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 <sys/param.h> 30*0Sstevel@tonic-gate #include <sys/errno.h> 31*0Sstevel@tonic-gate #include <sys/proc.h> 32*0Sstevel@tonic-gate #include <sys/disp.h> 33*0Sstevel@tonic-gate #include <sys/vfs.h> 34*0Sstevel@tonic-gate #include <sys/vnode.h> 35*0Sstevel@tonic-gate #include <sys/uio.h> 36*0Sstevel@tonic-gate #include <sys/kmem.h> 37*0Sstevel@tonic-gate #include <sys/cred.h> 38*0Sstevel@tonic-gate #include <sys/statvfs.h> 39*0Sstevel@tonic-gate #include <sys/mount.h> 40*0Sstevel@tonic-gate #include <sys/tiuser.h> 41*0Sstevel@tonic-gate #include <sys/cmn_err.h> 42*0Sstevel@tonic-gate #include <sys/debug.h> 43*0Sstevel@tonic-gate #include <sys/mkdev.h> 44*0Sstevel@tonic-gate #include <sys/systm.h> 45*0Sstevel@tonic-gate #include <sys/sysmacros.h> 46*0Sstevel@tonic-gate #include <sys/pathname.h> 47*0Sstevel@tonic-gate #include <rpc/types.h> 48*0Sstevel@tonic-gate #include <rpc/auth.h> 49*0Sstevel@tonic-gate #include <rpc/clnt.h> 50*0Sstevel@tonic-gate #include <sys/dnlc.h> 51*0Sstevel@tonic-gate #include <fs/fs_subr.h> 52*0Sstevel@tonic-gate #include <sys/fs/autofs.h> 53*0Sstevel@tonic-gate #include <rpcsvc/autofs_prot.h> 54*0Sstevel@tonic-gate #include <sys/note.h> 55*0Sstevel@tonic-gate #include <sys/modctl.h> 56*0Sstevel@tonic-gate #include <sys/mntent.h> 57*0Sstevel@tonic-gate #include <sys/policy.h> 58*0Sstevel@tonic-gate #include <sys/zone.h> 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate static int autofs_init(int, char *); 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate static major_t autofs_major; 63*0Sstevel@tonic-gate static minor_t autofs_minor; 64*0Sstevel@tonic-gate static kmutex_t autofs_minor_lock; 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate zone_key_t autofs_key; 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate static mntopts_t auto_mntopts; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate /* 71*0Sstevel@tonic-gate * The AUTOFS system call. 72*0Sstevel@tonic-gate */ 73*0Sstevel@tonic-gate static struct sysent autofssysent = { 74*0Sstevel@tonic-gate 2, 75*0Sstevel@tonic-gate SE_32RVAL1 | SE_ARGC | SE_NOUNLOAD, 76*0Sstevel@tonic-gate autofssys 77*0Sstevel@tonic-gate }; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate static struct modlsys modlsys = { 80*0Sstevel@tonic-gate &mod_syscallops, 81*0Sstevel@tonic-gate "AUTOFS syscall", 82*0Sstevel@tonic-gate &autofssysent 83*0Sstevel@tonic-gate }; 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 86*0Sstevel@tonic-gate static struct modlsys modlsys32 = { 87*0Sstevel@tonic-gate &mod_syscallops32, 88*0Sstevel@tonic-gate "AUTOFS syscall (32-bit)", 89*0Sstevel@tonic-gate &autofssysent 90*0Sstevel@tonic-gate }; 91*0Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate static vfsdef_t vfw = { 94*0Sstevel@tonic-gate VFSDEF_VERSION, 95*0Sstevel@tonic-gate "autofs", 96*0Sstevel@tonic-gate autofs_init, 97*0Sstevel@tonic-gate VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT, 98*0Sstevel@tonic-gate &auto_mntopts 99*0Sstevel@tonic-gate }; 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate /* 102*0Sstevel@tonic-gate * Module linkage information for the kernel. 103*0Sstevel@tonic-gate */ 104*0Sstevel@tonic-gate static struct modlfs modlfs = { 105*0Sstevel@tonic-gate &mod_fsops, "filesystem for autofs", &vfw 106*0Sstevel@tonic-gate }; 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 109*0Sstevel@tonic-gate MODREV_1, 110*0Sstevel@tonic-gate &modlsys, 111*0Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 112*0Sstevel@tonic-gate &modlsys32, 113*0Sstevel@tonic-gate #endif 114*0Sstevel@tonic-gate &modlfs, 115*0Sstevel@tonic-gate NULL 116*0Sstevel@tonic-gate }; 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate /* 119*0Sstevel@tonic-gate * There are not enough stubs for rpcmod so we must force load it 120*0Sstevel@tonic-gate */ 121*0Sstevel@tonic-gate char _depends_on[] = "strmod/rpcmod misc/rpcsec fs/mntfs"; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate /* 124*0Sstevel@tonic-gate * This is the module initialization routine. 125*0Sstevel@tonic-gate */ 126*0Sstevel@tonic-gate int 127*0Sstevel@tonic-gate _init(void) 128*0Sstevel@tonic-gate { 129*0Sstevel@tonic-gate return (mod_install(&modlinkage)); 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate int 133*0Sstevel@tonic-gate _fini(void) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate /* 136*0Sstevel@tonic-gate * Don't allow the autofs module to be unloaded for now. 137*0Sstevel@tonic-gate */ 138*0Sstevel@tonic-gate return (EBUSY); 139*0Sstevel@tonic-gate } 140*0Sstevel@tonic-gate 141*0Sstevel@tonic-gate int 142*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 143*0Sstevel@tonic-gate { 144*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 145*0Sstevel@tonic-gate } 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate static int autofs_fstype; 148*0Sstevel@tonic-gate 149*0Sstevel@tonic-gate /* 150*0Sstevel@tonic-gate * autofs VFS operations 151*0Sstevel@tonic-gate */ 152*0Sstevel@tonic-gate static int auto_mount(vfs_t *, vnode_t *, struct mounta *, cred_t *); 153*0Sstevel@tonic-gate static int auto_unmount(vfs_t *, int, cred_t *); 154*0Sstevel@tonic-gate static int auto_root(vfs_t *, vnode_t **); 155*0Sstevel@tonic-gate static int auto_statvfs(vfs_t *, struct statvfs64 *); 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate /* 158*0Sstevel@tonic-gate * Auto Mount options table 159*0Sstevel@tonic-gate */ 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate static char *direct_cancel[] = { MNTOPT_INDIRECT, NULL }; 162*0Sstevel@tonic-gate static char *indirect_cancel[] = { MNTOPT_DIRECT, NULL }; 163*0Sstevel@tonic-gate static char *browse_cancel[] = { MNTOPT_NOBROWSE, NULL }; 164*0Sstevel@tonic-gate static char *nobrowse_cancel[] = { MNTOPT_BROWSE, NULL }; 165*0Sstevel@tonic-gate 166*0Sstevel@tonic-gate static mntopt_t mntopts[] = { 167*0Sstevel@tonic-gate /* 168*0Sstevel@tonic-gate * option name cancel options default arg flags 169*0Sstevel@tonic-gate */ 170*0Sstevel@tonic-gate { MNTOPT_DIRECT, direct_cancel, NULL, 0, 171*0Sstevel@tonic-gate NULL }, 172*0Sstevel@tonic-gate { MNTOPT_INDIRECT, indirect_cancel, NULL, 0, 173*0Sstevel@tonic-gate NULL }, 174*0Sstevel@tonic-gate { MNTOPT_IGNORE, NULL, NULL, 175*0Sstevel@tonic-gate MO_DEFAULT|MO_TAG, NULL }, 176*0Sstevel@tonic-gate { "nest", NULL, NULL, MO_TAG, 177*0Sstevel@tonic-gate NULL }, 178*0Sstevel@tonic-gate { MNTOPT_BROWSE, browse_cancel, NULL, MO_TAG, 179*0Sstevel@tonic-gate NULL }, 180*0Sstevel@tonic-gate { MNTOPT_NOBROWSE, nobrowse_cancel, NULL, MO_TAG, 181*0Sstevel@tonic-gate NULL }, 182*0Sstevel@tonic-gate { MNTOPT_RESTRICT, NULL, NULL, MO_TAG, 183*0Sstevel@tonic-gate NULL }, 184*0Sstevel@tonic-gate }; 185*0Sstevel@tonic-gate 186*0Sstevel@tonic-gate static mntopts_t auto_mntopts = { 187*0Sstevel@tonic-gate sizeof (mntopts) / sizeof (mntopt_t), 188*0Sstevel@tonic-gate mntopts 189*0Sstevel@tonic-gate }; 190*0Sstevel@tonic-gate 191*0Sstevel@tonic-gate /*ARGSUSED*/ 192*0Sstevel@tonic-gate static void 193*0Sstevel@tonic-gate autofs_zone_destructor(zoneid_t zoneid, void *arg) 194*0Sstevel@tonic-gate { 195*0Sstevel@tonic-gate struct autofs_globals *fngp = arg; 196*0Sstevel@tonic-gate vnode_t *vp; 197*0Sstevel@tonic-gate 198*0Sstevel@tonic-gate if (fngp == NULL) 199*0Sstevel@tonic-gate return; 200*0Sstevel@tonic-gate ASSERT(fngp->fng_fnnode_count == 1); 201*0Sstevel@tonic-gate ASSERT(fngp->fng_unmount_threads == 0); 202*0Sstevel@tonic-gate /* 203*0Sstevel@tonic-gate * vn_alloc() initialized the rootnode with a count of 1; we need to 204*0Sstevel@tonic-gate * make this 0 to placate auto_freefnnode(). 205*0Sstevel@tonic-gate */ 206*0Sstevel@tonic-gate vp = fntovn(fngp->fng_rootfnnodep); 207*0Sstevel@tonic-gate ASSERT(vp->v_count == 1); 208*0Sstevel@tonic-gate vp->v_count--; 209*0Sstevel@tonic-gate auto_freefnnode(fngp->fng_rootfnnodep); 210*0Sstevel@tonic-gate mutex_destroy(&fngp->fng_unmount_threads_lock); 211*0Sstevel@tonic-gate kmem_free(fngp, sizeof (*fngp)); 212*0Sstevel@tonic-gate } 213*0Sstevel@tonic-gate 214*0Sstevel@tonic-gate /* 215*0Sstevel@tonic-gate * rootfnnodep is allocated here. Its sole purpose is to provide 216*0Sstevel@tonic-gate * read/write locking for top level fnnodes. This object is 217*0Sstevel@tonic-gate * persistent and will not be deallocated until the zone is destroyed. 218*0Sstevel@tonic-gate * 219*0Sstevel@tonic-gate * The current zone is implied as the zone of interest, since we will be 220*0Sstevel@tonic-gate * calling zthread_create() which must be called from the correct zone. 221*0Sstevel@tonic-gate */ 222*0Sstevel@tonic-gate static struct autofs_globals * 223*0Sstevel@tonic-gate autofs_zone_init(void) 224*0Sstevel@tonic-gate { 225*0Sstevel@tonic-gate char rootname[sizeof ("root_fnnode_zone_") + ZONEID_WIDTH]; 226*0Sstevel@tonic-gate struct autofs_globals *fngp; 227*0Sstevel@tonic-gate zoneid_t zoneid = getzoneid(); 228*0Sstevel@tonic-gate 229*0Sstevel@tonic-gate fngp = kmem_zalloc(sizeof (*fngp), KM_SLEEP); 230*0Sstevel@tonic-gate (void) snprintf(rootname, sizeof (rootname), "root_fnnode_zone_%d", 231*0Sstevel@tonic-gate zoneid); 232*0Sstevel@tonic-gate fngp->fng_rootfnnodep = auto_makefnnode(VNON, NULL, rootname, CRED(), 233*0Sstevel@tonic-gate fngp); 234*0Sstevel@tonic-gate /* 235*0Sstevel@tonic-gate * Don't need to hold fng_rootfnnodep as it's never really used for 236*0Sstevel@tonic-gate * anything. 237*0Sstevel@tonic-gate */ 238*0Sstevel@tonic-gate fngp->fng_fnnode_count = 1; 239*0Sstevel@tonic-gate fngp->fng_printed_not_running_msg = 0; 240*0Sstevel@tonic-gate fngp->fng_zoneid = zoneid; 241*0Sstevel@tonic-gate mutex_init(&fngp->fng_unmount_threads_lock, NULL, MUTEX_DEFAULT, 242*0Sstevel@tonic-gate NULL); 243*0Sstevel@tonic-gate fngp->fng_unmount_threads = 0; 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate /* 246*0Sstevel@tonic-gate * Start the unmounter thread for this zone. 247*0Sstevel@tonic-gate */ 248*0Sstevel@tonic-gate (void) zthread_create(NULL, 0, auto_do_unmount, fngp, 0, minclsyspri); 249*0Sstevel@tonic-gate return (fngp); 250*0Sstevel@tonic-gate } 251*0Sstevel@tonic-gate 252*0Sstevel@tonic-gate int 253*0Sstevel@tonic-gate autofs_init(int fstype, char *name) 254*0Sstevel@tonic-gate { 255*0Sstevel@tonic-gate static const fs_operation_def_t auto_vfsops_template[] = { 256*0Sstevel@tonic-gate VFSNAME_MOUNT, auto_mount, 257*0Sstevel@tonic-gate VFSNAME_UNMOUNT, auto_unmount, 258*0Sstevel@tonic-gate VFSNAME_ROOT, auto_root, 259*0Sstevel@tonic-gate VFSNAME_STATVFS, auto_statvfs, 260*0Sstevel@tonic-gate NULL, NULL 261*0Sstevel@tonic-gate }; 262*0Sstevel@tonic-gate int error; 263*0Sstevel@tonic-gate 264*0Sstevel@tonic-gate autofs_fstype = fstype; 265*0Sstevel@tonic-gate ASSERT(autofs_fstype != 0); 266*0Sstevel@tonic-gate /* 267*0Sstevel@tonic-gate * Associate VFS ops vector with this fstype 268*0Sstevel@tonic-gate */ 269*0Sstevel@tonic-gate error = vfs_setfsops(fstype, auto_vfsops_template, NULL); 270*0Sstevel@tonic-gate if (error != 0) { 271*0Sstevel@tonic-gate cmn_err(CE_WARN, "autofs_init: bad vfs ops template"); 272*0Sstevel@tonic-gate return (error); 273*0Sstevel@tonic-gate } 274*0Sstevel@tonic-gate 275*0Sstevel@tonic-gate error = vn_make_ops(name, auto_vnodeops_template, &auto_vnodeops); 276*0Sstevel@tonic-gate if (error != 0) { 277*0Sstevel@tonic-gate (void) vfs_freevfsops_by_type(fstype); 278*0Sstevel@tonic-gate cmn_err(CE_WARN, "autofs_init: bad vnode ops template"); 279*0Sstevel@tonic-gate return (error); 280*0Sstevel@tonic-gate } 281*0Sstevel@tonic-gate 282*0Sstevel@tonic-gate mutex_init(&autofs_minor_lock, NULL, MUTEX_DEFAULT, NULL); 283*0Sstevel@tonic-gate /* 284*0Sstevel@tonic-gate * Assign unique major number for all autofs mounts 285*0Sstevel@tonic-gate */ 286*0Sstevel@tonic-gate if ((autofs_major = getudev()) == (major_t)-1) { 287*0Sstevel@tonic-gate cmn_err(CE_WARN, 288*0Sstevel@tonic-gate "autofs: autofs_init: can't get unique device number"); 289*0Sstevel@tonic-gate mutex_destroy(&autofs_minor_lock); 290*0Sstevel@tonic-gate return (1); 291*0Sstevel@tonic-gate } 292*0Sstevel@tonic-gate 293*0Sstevel@tonic-gate /* 294*0Sstevel@tonic-gate * We'd like to be able to provide a constructor here, but we can't 295*0Sstevel@tonic-gate * since it wants to zthread_create(), something it can't do in a ZSD 296*0Sstevel@tonic-gate * constructor. 297*0Sstevel@tonic-gate */ 298*0Sstevel@tonic-gate zone_key_create(&autofs_key, NULL, NULL, autofs_zone_destructor); 299*0Sstevel@tonic-gate 300*0Sstevel@tonic-gate return (0); 301*0Sstevel@tonic-gate } 302*0Sstevel@tonic-gate 303*0Sstevel@tonic-gate static char *restropts[] = { 304*0Sstevel@tonic-gate RESTRICTED_MNTOPTS 305*0Sstevel@tonic-gate }; 306*0Sstevel@tonic-gate 307*0Sstevel@tonic-gate /* 308*0Sstevel@tonic-gate * This routine adds those options to the option string `buf' which are 309*0Sstevel@tonic-gate * forced by secpolicy_fs_mount. If the automatic "security" options 310*0Sstevel@tonic-gate * are set, the option string gets them added if they aren't already 311*0Sstevel@tonic-gate * there. We search the string with "strstr" and make sure that 312*0Sstevel@tonic-gate * the string we find is bracketed with <start|",">MNTOPT<","|"\0"> 313*0Sstevel@tonic-gate * 314*0Sstevel@tonic-gate * This is one half of the option inheritence algorithm which 315*0Sstevel@tonic-gate * implements the "restrict" option. The other half is implemented 316*0Sstevel@tonic-gate * in automountd; it takes its cue from the options we add here. 317*0Sstevel@tonic-gate */ 318*0Sstevel@tonic-gate static int 319*0Sstevel@tonic-gate autofs_restrict_opts(struct vfs *vfsp, char *buf, size_t maxlen, size_t *curlen) 320*0Sstevel@tonic-gate { 321*0Sstevel@tonic-gate int i; 322*0Sstevel@tonic-gate char *p; 323*0Sstevel@tonic-gate size_t len = *curlen - 1; 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate /* Unrestricted */ 326*0Sstevel@tonic-gate if (!vfs_optionisset(vfsp, restropts[0], NULL)) 327*0Sstevel@tonic-gate return (0); 328*0Sstevel@tonic-gate 329*0Sstevel@tonic-gate for (i = 0; i < sizeof (restropts)/sizeof (restropts[0]); i++) { 330*0Sstevel@tonic-gate size_t olen = strlen(restropts[i]); 331*0Sstevel@tonic-gate 332*0Sstevel@tonic-gate /* Add "restrict" always and the others insofar set */ 333*0Sstevel@tonic-gate if ((i == 0 || vfs_optionisset(vfsp, restropts[i], NULL)) && 334*0Sstevel@tonic-gate ((p = strstr(buf, restropts[i])) == NULL || 335*0Sstevel@tonic-gate !((p == buf || p[-1] == ',') && 336*0Sstevel@tonic-gate (p[olen] == '\0' || p[olen] == ',')))) { 337*0Sstevel@tonic-gate 338*0Sstevel@tonic-gate if (len + olen + 1 > maxlen) 339*0Sstevel@tonic-gate return (-1); 340*0Sstevel@tonic-gate 341*0Sstevel@tonic-gate if (*buf != '\0') 342*0Sstevel@tonic-gate buf[len++] = ','; 343*0Sstevel@tonic-gate (void) strcpy(&buf[len], restropts[i]); 344*0Sstevel@tonic-gate len += olen; 345*0Sstevel@tonic-gate } 346*0Sstevel@tonic-gate } 347*0Sstevel@tonic-gate *curlen = len + 1; 348*0Sstevel@tonic-gate return (0); 349*0Sstevel@tonic-gate } 350*0Sstevel@tonic-gate 351*0Sstevel@tonic-gate /* ARGSUSED */ 352*0Sstevel@tonic-gate static int 353*0Sstevel@tonic-gate auto_mount(vfs_t *vfsp, vnode_t *vp, struct mounta *uap, cred_t *cr) 354*0Sstevel@tonic-gate { 355*0Sstevel@tonic-gate int error; 356*0Sstevel@tonic-gate size_t len = 0; 357*0Sstevel@tonic-gate struct autofs_args args; 358*0Sstevel@tonic-gate fninfo_t *fnip = NULL; 359*0Sstevel@tonic-gate vnode_t *rootvp = NULL; 360*0Sstevel@tonic-gate fnnode_t *rootfnp = NULL; 361*0Sstevel@tonic-gate char *data = uap->dataptr; 362*0Sstevel@tonic-gate char datalen = uap->datalen; 363*0Sstevel@tonic-gate dev_t autofs_dev; 364*0Sstevel@tonic-gate char strbuff[MAXPATHLEN+1]; 365*0Sstevel@tonic-gate vnode_t *kvp; 366*0Sstevel@tonic-gate struct autofs_globals *fngp; 367*0Sstevel@tonic-gate zone_t *zone = curproc->p_zone; 368*0Sstevel@tonic-gate 369*0Sstevel@tonic-gate AUTOFS_DPRINT((4, "auto_mount: vfs %p vp %p\n", (void *)vfsp, 370*0Sstevel@tonic-gate (void *)vp)); 371*0Sstevel@tonic-gate 372*0Sstevel@tonic-gate if ((error = secpolicy_fs_mount(cr, vp, vfsp)) != 0) 373*0Sstevel@tonic-gate return (EPERM); 374*0Sstevel@tonic-gate 375*0Sstevel@tonic-gate if (zone == global_zone) { 376*0Sstevel@tonic-gate zone_t *mntzone; 377*0Sstevel@tonic-gate 378*0Sstevel@tonic-gate mntzone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt)); 379*0Sstevel@tonic-gate ASSERT(mntzone != NULL); 380*0Sstevel@tonic-gate zone_rele(mntzone); 381*0Sstevel@tonic-gate if (mntzone != zone) { 382*0Sstevel@tonic-gate return (EBUSY); 383*0Sstevel@tonic-gate } 384*0Sstevel@tonic-gate } 385*0Sstevel@tonic-gate 386*0Sstevel@tonic-gate /* 387*0Sstevel@tonic-gate * Stop the mount from going any further if the zone is going away. 388*0Sstevel@tonic-gate */ 389*0Sstevel@tonic-gate if (zone_status_get(zone) >= ZONE_IS_SHUTTING_DOWN) 390*0Sstevel@tonic-gate return (EBUSY); 391*0Sstevel@tonic-gate 392*0Sstevel@tonic-gate /* 393*0Sstevel@tonic-gate * We need a lock to serialize this; minor_lock is as good as any. 394*0Sstevel@tonic-gate */ 395*0Sstevel@tonic-gate mutex_enter(&autofs_minor_lock); 396*0Sstevel@tonic-gate if ((fngp = zone_getspecific(autofs_key, zone)) == NULL) { 397*0Sstevel@tonic-gate fngp = autofs_zone_init(); 398*0Sstevel@tonic-gate (void) zone_setspecific(autofs_key, zone, fngp); 399*0Sstevel@tonic-gate } 400*0Sstevel@tonic-gate mutex_exit(&autofs_minor_lock); 401*0Sstevel@tonic-gate ASSERT(fngp != NULL); 402*0Sstevel@tonic-gate 403*0Sstevel@tonic-gate /* 404*0Sstevel@tonic-gate * Get arguments 405*0Sstevel@tonic-gate */ 406*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) { 407*0Sstevel@tonic-gate if (datalen != sizeof (args)) 408*0Sstevel@tonic-gate return (EINVAL); 409*0Sstevel@tonic-gate error = kcopy(data, &args, sizeof (args)); 410*0Sstevel@tonic-gate } else { 411*0Sstevel@tonic-gate if (get_udatamodel() == DATAMODEL_NATIVE) { 412*0Sstevel@tonic-gate if (datalen != sizeof (args)) 413*0Sstevel@tonic-gate return (EINVAL); 414*0Sstevel@tonic-gate error = copyin(data, &args, sizeof (args)); 415*0Sstevel@tonic-gate } else { 416*0Sstevel@tonic-gate struct autofs_args32 args32; 417*0Sstevel@tonic-gate 418*0Sstevel@tonic-gate if (datalen != sizeof (args32)) 419*0Sstevel@tonic-gate return (EINVAL); 420*0Sstevel@tonic-gate error = copyin(data, &args32, sizeof (args32)); 421*0Sstevel@tonic-gate 422*0Sstevel@tonic-gate args.addr.maxlen = args32.addr.maxlen; 423*0Sstevel@tonic-gate args.addr.len = args32.addr.len; 424*0Sstevel@tonic-gate args.addr.buf = (char *)(uintptr_t)args32.addr.buf; 425*0Sstevel@tonic-gate args.path = (char *)(uintptr_t)args32.path; 426*0Sstevel@tonic-gate args.opts = (char *)(uintptr_t)args32.opts; 427*0Sstevel@tonic-gate args.map = (char *)(uintptr_t)args32.map; 428*0Sstevel@tonic-gate args.subdir = (char *)(uintptr_t)args32.subdir; 429*0Sstevel@tonic-gate args.key = (char *)(uintptr_t)args32.key; 430*0Sstevel@tonic-gate args.mount_to = args32.mount_to; 431*0Sstevel@tonic-gate args.rpc_to = args32.rpc_to; 432*0Sstevel@tonic-gate args.direct = args32.direct; 433*0Sstevel@tonic-gate } 434*0Sstevel@tonic-gate } 435*0Sstevel@tonic-gate if (error) 436*0Sstevel@tonic-gate return (EFAULT); 437*0Sstevel@tonic-gate 438*0Sstevel@tonic-gate /* 439*0Sstevel@tonic-gate * For a remount, only update mount information 440*0Sstevel@tonic-gate * i.e. default mount options, map name, etc. 441*0Sstevel@tonic-gate */ 442*0Sstevel@tonic-gate if (uap->flags & MS_REMOUNT) { 443*0Sstevel@tonic-gate fnip = vfstofni(vfsp); 444*0Sstevel@tonic-gate if (fnip == NULL) 445*0Sstevel@tonic-gate return (EINVAL); 446*0Sstevel@tonic-gate 447*0Sstevel@tonic-gate if (args.direct == 1) 448*0Sstevel@tonic-gate fnip->fi_flags |= MF_DIRECT; 449*0Sstevel@tonic-gate else 450*0Sstevel@tonic-gate fnip->fi_flags &= ~MF_DIRECT; 451*0Sstevel@tonic-gate fnip->fi_mount_to = args.mount_to; 452*0Sstevel@tonic-gate fnip->fi_rpc_to = args.rpc_to; 453*0Sstevel@tonic-gate 454*0Sstevel@tonic-gate /* 455*0Sstevel@tonic-gate * Get default options 456*0Sstevel@tonic-gate */ 457*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 458*0Sstevel@tonic-gate error = copystr(args.opts, strbuff, sizeof (strbuff), 459*0Sstevel@tonic-gate &len); 460*0Sstevel@tonic-gate else 461*0Sstevel@tonic-gate error = copyinstr(args.opts, strbuff, sizeof (strbuff), 462*0Sstevel@tonic-gate &len); 463*0Sstevel@tonic-gate if (error) 464*0Sstevel@tonic-gate return (EFAULT); 465*0Sstevel@tonic-gate 466*0Sstevel@tonic-gate if (autofs_restrict_opts(vfsp, strbuff, sizeof (strbuff), &len) 467*0Sstevel@tonic-gate != 0) { 468*0Sstevel@tonic-gate return (EFAULT); 469*0Sstevel@tonic-gate } 470*0Sstevel@tonic-gate 471*0Sstevel@tonic-gate kmem_free(fnip->fi_opts, fnip->fi_optslen); 472*0Sstevel@tonic-gate fnip->fi_opts = kmem_alloc(len, KM_SLEEP); 473*0Sstevel@tonic-gate fnip->fi_optslen = (int)len; 474*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_opts, len); 475*0Sstevel@tonic-gate 476*0Sstevel@tonic-gate /* 477*0Sstevel@tonic-gate * Get context/map name 478*0Sstevel@tonic-gate */ 479*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 480*0Sstevel@tonic-gate error = copystr(args.map, strbuff, sizeof (strbuff), 481*0Sstevel@tonic-gate &len); 482*0Sstevel@tonic-gate else 483*0Sstevel@tonic-gate error = copyinstr(args.map, strbuff, sizeof (strbuff), 484*0Sstevel@tonic-gate &len); 485*0Sstevel@tonic-gate if (error) 486*0Sstevel@tonic-gate return (EFAULT); 487*0Sstevel@tonic-gate 488*0Sstevel@tonic-gate kmem_free(fnip->fi_map, fnip->fi_maplen); 489*0Sstevel@tonic-gate fnip->fi_map = kmem_alloc(len, KM_SLEEP); 490*0Sstevel@tonic-gate fnip->fi_maplen = (int)len; 491*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_map, len); 492*0Sstevel@tonic-gate 493*0Sstevel@tonic-gate return (0); 494*0Sstevel@tonic-gate } 495*0Sstevel@tonic-gate 496*0Sstevel@tonic-gate /* 497*0Sstevel@tonic-gate * Allocate fninfo struct and attach it to vfs 498*0Sstevel@tonic-gate */ 499*0Sstevel@tonic-gate fnip = kmem_zalloc(sizeof (*fnip), KM_SLEEP); 500*0Sstevel@tonic-gate fnip->fi_mountvfs = vfsp; 501*0Sstevel@tonic-gate 502*0Sstevel@tonic-gate fnip->fi_mount_to = args.mount_to; 503*0Sstevel@tonic-gate fnip->fi_rpc_to = args.rpc_to; 504*0Sstevel@tonic-gate fnip->fi_refcnt = 0; 505*0Sstevel@tonic-gate vfsp->vfs_bsize = AUTOFS_BLOCKSIZE; 506*0Sstevel@tonic-gate vfsp->vfs_fstype = autofs_fstype; 507*0Sstevel@tonic-gate 508*0Sstevel@tonic-gate /* 509*0Sstevel@tonic-gate * Assign a unique device id to the mount 510*0Sstevel@tonic-gate */ 511*0Sstevel@tonic-gate mutex_enter(&autofs_minor_lock); 512*0Sstevel@tonic-gate do { 513*0Sstevel@tonic-gate autofs_minor = (autofs_minor + 1) & L_MAXMIN32; 514*0Sstevel@tonic-gate autofs_dev = makedevice(autofs_major, autofs_minor); 515*0Sstevel@tonic-gate } while (vfs_devismounted(autofs_dev)); 516*0Sstevel@tonic-gate mutex_exit(&autofs_minor_lock); 517*0Sstevel@tonic-gate vfsp->vfs_dev = autofs_dev; 518*0Sstevel@tonic-gate vfs_make_fsid(&vfsp->vfs_fsid, autofs_dev, autofs_fstype); 519*0Sstevel@tonic-gate vfsp->vfs_data = (void *)fnip; 520*0Sstevel@tonic-gate vfsp->vfs_bcount = 0; 521*0Sstevel@tonic-gate 522*0Sstevel@tonic-gate /* 523*0Sstevel@tonic-gate * Get daemon address 524*0Sstevel@tonic-gate */ 525*0Sstevel@tonic-gate fnip->fi_addr.len = args.addr.len; 526*0Sstevel@tonic-gate fnip->fi_addr.maxlen = fnip->fi_addr.len; 527*0Sstevel@tonic-gate fnip->fi_addr.buf = kmem_alloc(args.addr.len, KM_SLEEP); 528*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 529*0Sstevel@tonic-gate error = kcopy(args.addr.buf, fnip->fi_addr.buf, args.addr.len); 530*0Sstevel@tonic-gate else 531*0Sstevel@tonic-gate error = copyin(args.addr.buf, fnip->fi_addr.buf, args.addr.len); 532*0Sstevel@tonic-gate if (error) { 533*0Sstevel@tonic-gate error = EFAULT; 534*0Sstevel@tonic-gate goto errout; 535*0Sstevel@tonic-gate } 536*0Sstevel@tonic-gate 537*0Sstevel@tonic-gate fnip->fi_zoneid = getzoneid(); 538*0Sstevel@tonic-gate /* 539*0Sstevel@tonic-gate * Get path for mountpoint 540*0Sstevel@tonic-gate */ 541*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 542*0Sstevel@tonic-gate error = copystr(args.path, strbuff, sizeof (strbuff), &len); 543*0Sstevel@tonic-gate else 544*0Sstevel@tonic-gate error = copyinstr(args.path, strbuff, sizeof (strbuff), &len); 545*0Sstevel@tonic-gate if (error) { 546*0Sstevel@tonic-gate error = EFAULT; 547*0Sstevel@tonic-gate goto errout; 548*0Sstevel@tonic-gate } 549*0Sstevel@tonic-gate fnip->fi_path = kmem_alloc(len, KM_SLEEP); 550*0Sstevel@tonic-gate fnip->fi_pathlen = (int)len; 551*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_path, len); 552*0Sstevel@tonic-gate 553*0Sstevel@tonic-gate /* 554*0Sstevel@tonic-gate * Get default options 555*0Sstevel@tonic-gate */ 556*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 557*0Sstevel@tonic-gate error = copystr(args.opts, strbuff, sizeof (strbuff), &len); 558*0Sstevel@tonic-gate else 559*0Sstevel@tonic-gate error = copyinstr(args.opts, strbuff, sizeof (strbuff), &len); 560*0Sstevel@tonic-gate 561*0Sstevel@tonic-gate if (error != 0 || 562*0Sstevel@tonic-gate autofs_restrict_opts(vfsp, strbuff, sizeof (strbuff), &len) != 0) { 563*0Sstevel@tonic-gate error = EFAULT; 564*0Sstevel@tonic-gate goto errout; 565*0Sstevel@tonic-gate } 566*0Sstevel@tonic-gate fnip->fi_opts = kmem_alloc(len, KM_SLEEP); 567*0Sstevel@tonic-gate fnip->fi_optslen = (int)len; 568*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_opts, len); 569*0Sstevel@tonic-gate 570*0Sstevel@tonic-gate /* 571*0Sstevel@tonic-gate * Get context/map name 572*0Sstevel@tonic-gate */ 573*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 574*0Sstevel@tonic-gate error = copystr(args.map, strbuff, sizeof (strbuff), &len); 575*0Sstevel@tonic-gate else 576*0Sstevel@tonic-gate error = copyinstr(args.map, strbuff, sizeof (strbuff), &len); 577*0Sstevel@tonic-gate if (error) { 578*0Sstevel@tonic-gate error = EFAULT; 579*0Sstevel@tonic-gate goto errout; 580*0Sstevel@tonic-gate } 581*0Sstevel@tonic-gate fnip->fi_map = kmem_alloc(len, KM_SLEEP); 582*0Sstevel@tonic-gate fnip->fi_maplen = (int)len; 583*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_map, len); 584*0Sstevel@tonic-gate 585*0Sstevel@tonic-gate /* 586*0Sstevel@tonic-gate * Get subdirectory within map 587*0Sstevel@tonic-gate */ 588*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 589*0Sstevel@tonic-gate error = copystr(args.subdir, strbuff, sizeof (strbuff), &len); 590*0Sstevel@tonic-gate else 591*0Sstevel@tonic-gate error = copyinstr(args.subdir, strbuff, sizeof (strbuff), &len); 592*0Sstevel@tonic-gate if (error) { 593*0Sstevel@tonic-gate error = EFAULT; 594*0Sstevel@tonic-gate goto errout; 595*0Sstevel@tonic-gate } 596*0Sstevel@tonic-gate fnip->fi_subdir = kmem_alloc(len, KM_SLEEP); 597*0Sstevel@tonic-gate fnip->fi_subdirlen = (int)len; 598*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_subdir, len); 599*0Sstevel@tonic-gate 600*0Sstevel@tonic-gate /* 601*0Sstevel@tonic-gate * Get the key 602*0Sstevel@tonic-gate */ 603*0Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) 604*0Sstevel@tonic-gate error = copystr(args.key, strbuff, sizeof (strbuff), &len); 605*0Sstevel@tonic-gate else 606*0Sstevel@tonic-gate error = copyinstr(args.key, strbuff, sizeof (strbuff), &len); 607*0Sstevel@tonic-gate if (error) { 608*0Sstevel@tonic-gate error = EFAULT; 609*0Sstevel@tonic-gate goto errout; 610*0Sstevel@tonic-gate } 611*0Sstevel@tonic-gate fnip->fi_key = kmem_alloc(len, KM_SLEEP); 612*0Sstevel@tonic-gate fnip->fi_keylen = (int)len; 613*0Sstevel@tonic-gate bcopy(strbuff, fnip->fi_key, len); 614*0Sstevel@tonic-gate 615*0Sstevel@tonic-gate /* 616*0Sstevel@tonic-gate * Is this a direct mount? 617*0Sstevel@tonic-gate */ 618*0Sstevel@tonic-gate if (args.direct == 1) 619*0Sstevel@tonic-gate fnip->fi_flags |= MF_DIRECT; 620*0Sstevel@tonic-gate 621*0Sstevel@tonic-gate /* 622*0Sstevel@tonic-gate * Setup netconfig. 623*0Sstevel@tonic-gate * Can I pass in knconf as mount argument? what 624*0Sstevel@tonic-gate * happens when the daemon gets restarted? 625*0Sstevel@tonic-gate */ 626*0Sstevel@tonic-gate if ((error = lookupname("/dev/ticotsord", UIO_SYSSPACE, FOLLOW, 627*0Sstevel@tonic-gate NULLVPP, &kvp)) != 0) { 628*0Sstevel@tonic-gate cmn_err(CE_WARN, "autofs: lookupname: %d", error); 629*0Sstevel@tonic-gate goto errout; 630*0Sstevel@tonic-gate } 631*0Sstevel@tonic-gate 632*0Sstevel@tonic-gate fnip->fi_knconf.knc_rdev = kvp->v_rdev; 633*0Sstevel@tonic-gate fnip->fi_knconf.knc_protofmly = NC_LOOPBACK; 634*0Sstevel@tonic-gate fnip->fi_knconf.knc_semantics = NC_TPI_COTS_ORD; 635*0Sstevel@tonic-gate VN_RELE(kvp); 636*0Sstevel@tonic-gate 637*0Sstevel@tonic-gate /* 638*0Sstevel@tonic-gate * Make the root vnode 639*0Sstevel@tonic-gate */ 640*0Sstevel@tonic-gate rootfnp = auto_makefnnode(VDIR, vfsp, fnip->fi_path, cr, fngp); 641*0Sstevel@tonic-gate if (rootfnp == NULL) { 642*0Sstevel@tonic-gate error = ENOMEM; 643*0Sstevel@tonic-gate goto errout; 644*0Sstevel@tonic-gate } 645*0Sstevel@tonic-gate rootvp = fntovn(rootfnp); 646*0Sstevel@tonic-gate 647*0Sstevel@tonic-gate rootvp->v_flag |= VROOT; 648*0Sstevel@tonic-gate rootfnp->fn_mode = AUTOFS_MODE; 649*0Sstevel@tonic-gate rootfnp->fn_parent = rootfnp; 650*0Sstevel@tonic-gate /* account for ".." entry */ 651*0Sstevel@tonic-gate rootfnp->fn_linkcnt = rootfnp->fn_size = 1; 652*0Sstevel@tonic-gate fnip->fi_rootvp = rootvp; 653*0Sstevel@tonic-gate 654*0Sstevel@tonic-gate /* 655*0Sstevel@tonic-gate * Add to list of top level AUTOFS' if it is being mounted by 656*0Sstevel@tonic-gate * a user level process. 657*0Sstevel@tonic-gate */ 658*0Sstevel@tonic-gate if (!(uap->flags & MS_SYSSPACE)) { 659*0Sstevel@tonic-gate rw_enter(&fngp->fng_rootfnnodep->fn_rwlock, RW_WRITER); 660*0Sstevel@tonic-gate rootfnp->fn_parent = fngp->fng_rootfnnodep; 661*0Sstevel@tonic-gate rootfnp->fn_next = fngp->fng_rootfnnodep->fn_dirents; 662*0Sstevel@tonic-gate fngp->fng_rootfnnodep->fn_dirents = rootfnp; 663*0Sstevel@tonic-gate rw_exit(&fngp->fng_rootfnnodep->fn_rwlock); 664*0Sstevel@tonic-gate } 665*0Sstevel@tonic-gate 666*0Sstevel@tonic-gate AUTOFS_DPRINT((5, "auto_mount: vfs %p root %p fnip %p return %d\n", 667*0Sstevel@tonic-gate (void *)vfsp, (void *)rootvp, (void *)fnip, error)); 668*0Sstevel@tonic-gate 669*0Sstevel@tonic-gate return (0); 670*0Sstevel@tonic-gate 671*0Sstevel@tonic-gate errout: 672*0Sstevel@tonic-gate ASSERT(fnip != NULL); 673*0Sstevel@tonic-gate ASSERT((uap->flags & MS_REMOUNT) == 0); 674*0Sstevel@tonic-gate 675*0Sstevel@tonic-gate if (fnip->fi_addr.buf != NULL) 676*0Sstevel@tonic-gate kmem_free(fnip->fi_addr.buf, fnip->fi_addr.len); 677*0Sstevel@tonic-gate if (fnip->fi_path != NULL) 678*0Sstevel@tonic-gate kmem_free(fnip->fi_path, fnip->fi_pathlen); 679*0Sstevel@tonic-gate if (fnip->fi_opts != NULL) 680*0Sstevel@tonic-gate kmem_free(fnip->fi_opts, fnip->fi_optslen); 681*0Sstevel@tonic-gate if (fnip->fi_map != NULL) 682*0Sstevel@tonic-gate kmem_free(fnip->fi_map, fnip->fi_maplen); 683*0Sstevel@tonic-gate if (fnip->fi_subdir != NULL) 684*0Sstevel@tonic-gate kmem_free(fnip->fi_subdir, fnip->fi_subdirlen); 685*0Sstevel@tonic-gate if (fnip->fi_key != NULL) 686*0Sstevel@tonic-gate kmem_free(fnip->fi_key, fnip->fi_keylen); 687*0Sstevel@tonic-gate kmem_free(fnip, sizeof (*fnip)); 688*0Sstevel@tonic-gate 689*0Sstevel@tonic-gate AUTOFS_DPRINT((5, "auto_mount: vfs %p root %p fnip %p return %d\n", 690*0Sstevel@tonic-gate (void *)vfsp, (void *)rootvp, (void *)fnip, error)); 691*0Sstevel@tonic-gate 692*0Sstevel@tonic-gate return (error); 693*0Sstevel@tonic-gate } 694*0Sstevel@tonic-gate 695*0Sstevel@tonic-gate /* ARGSUSED */ 696*0Sstevel@tonic-gate static int 697*0Sstevel@tonic-gate auto_unmount(vfs_t *vfsp, int flag, cred_t *cr) 698*0Sstevel@tonic-gate { 699*0Sstevel@tonic-gate fninfo_t *fnip; 700*0Sstevel@tonic-gate vnode_t *rvp; 701*0Sstevel@tonic-gate fnnode_t *rfnp, *fnp, *pfnp; 702*0Sstevel@tonic-gate fnnode_t *myrootfnnodep; 703*0Sstevel@tonic-gate 704*0Sstevel@tonic-gate fnip = vfstofni(vfsp); 705*0Sstevel@tonic-gate AUTOFS_DPRINT((4, "auto_unmount vfsp %p fnip %p\n", (void *)vfsp, 706*0Sstevel@tonic-gate (void *)fnip)); 707*0Sstevel@tonic-gate 708*0Sstevel@tonic-gate if (secpolicy_fs_unmount(cr, vfsp) != 0) 709*0Sstevel@tonic-gate return (EPERM); 710*0Sstevel@tonic-gate /* 711*0Sstevel@tonic-gate * forced unmount is not supported by this file system 712*0Sstevel@tonic-gate * and thus, ENOTSUP, is being returned. 713*0Sstevel@tonic-gate */ 714*0Sstevel@tonic-gate if (flag & MS_FORCE) 715*0Sstevel@tonic-gate return (ENOTSUP); 716*0Sstevel@tonic-gate 717*0Sstevel@tonic-gate ASSERT(vn_vfswlock_held(vfsp->vfs_vnodecovered)); 718*0Sstevel@tonic-gate rvp = fnip->fi_rootvp; 719*0Sstevel@tonic-gate rfnp = vntofn(rvp); 720*0Sstevel@tonic-gate 721*0Sstevel@tonic-gate if (rvp->v_count > 1 || rfnp->fn_dirents != NULL) 722*0Sstevel@tonic-gate return (EBUSY); 723*0Sstevel@tonic-gate 724*0Sstevel@tonic-gate /* 725*0Sstevel@tonic-gate * The root vnode is on the linked list of root fnnodes only if 726*0Sstevel@tonic-gate * this was not a trigger node. Since we have no way of knowing, 727*0Sstevel@tonic-gate * if we don't find it, then we assume it was a trigger node. 728*0Sstevel@tonic-gate */ 729*0Sstevel@tonic-gate myrootfnnodep = rfnp->fn_globals->fng_rootfnnodep; 730*0Sstevel@tonic-gate pfnp = NULL; 731*0Sstevel@tonic-gate rw_enter(&myrootfnnodep->fn_rwlock, RW_WRITER); 732*0Sstevel@tonic-gate fnp = myrootfnnodep->fn_dirents; 733*0Sstevel@tonic-gate while (fnp != NULL) { 734*0Sstevel@tonic-gate if (fnp == rfnp) { 735*0Sstevel@tonic-gate /* 736*0Sstevel@tonic-gate * A check here is made to see if rvp is busy. If 737*0Sstevel@tonic-gate * so, return EBUSY. Otherwise proceed with 738*0Sstevel@tonic-gate * disconnecting it from the list. 739*0Sstevel@tonic-gate */ 740*0Sstevel@tonic-gate if (rvp->v_count > 1 || rfnp->fn_dirents != NULL) { 741*0Sstevel@tonic-gate rw_exit(&myrootfnnodep->fn_rwlock); 742*0Sstevel@tonic-gate return (EBUSY); 743*0Sstevel@tonic-gate } 744*0Sstevel@tonic-gate if (pfnp) 745*0Sstevel@tonic-gate pfnp->fn_next = fnp->fn_next; 746*0Sstevel@tonic-gate else 747*0Sstevel@tonic-gate myrootfnnodep->fn_dirents = fnp->fn_next; 748*0Sstevel@tonic-gate fnp->fn_next = NULL; 749*0Sstevel@tonic-gate break; 750*0Sstevel@tonic-gate } 751*0Sstevel@tonic-gate pfnp = fnp; 752*0Sstevel@tonic-gate fnp = fnp->fn_next; 753*0Sstevel@tonic-gate } 754*0Sstevel@tonic-gate rw_exit(&myrootfnnodep->fn_rwlock); 755*0Sstevel@tonic-gate 756*0Sstevel@tonic-gate ASSERT(rvp->v_count == 1); 757*0Sstevel@tonic-gate ASSERT(rfnp->fn_size == 1); 758*0Sstevel@tonic-gate ASSERT(rfnp->fn_linkcnt == 1); 759*0Sstevel@tonic-gate /* 760*0Sstevel@tonic-gate * The following drops linkcnt to 0, therefore the disconnect is 761*0Sstevel@tonic-gate * not attempted when auto_inactive() is called by 762*0Sstevel@tonic-gate * vn_rele(). This is necessary because we have nothing to get 763*0Sstevel@tonic-gate * disconnected from since we're the root of the filesystem. As a 764*0Sstevel@tonic-gate * side effect the node is not freed, therefore I should free the 765*0Sstevel@tonic-gate * node here. 766*0Sstevel@tonic-gate * 767*0Sstevel@tonic-gate * XXX - I really need to think of a better way of doing this. 768*0Sstevel@tonic-gate */ 769*0Sstevel@tonic-gate rfnp->fn_size--; 770*0Sstevel@tonic-gate rfnp->fn_linkcnt--; 771*0Sstevel@tonic-gate 772*0Sstevel@tonic-gate /* 773*0Sstevel@tonic-gate * release of last reference causes node 774*0Sstevel@tonic-gate * to be freed 775*0Sstevel@tonic-gate */ 776*0Sstevel@tonic-gate VN_RELE(rvp); 777*0Sstevel@tonic-gate rfnp->fn_parent = NULL; 778*0Sstevel@tonic-gate 779*0Sstevel@tonic-gate auto_freefnnode(rfnp); 780*0Sstevel@tonic-gate 781*0Sstevel@tonic-gate kmem_free(fnip->fi_addr.buf, fnip->fi_addr.len); 782*0Sstevel@tonic-gate kmem_free(fnip->fi_path, fnip->fi_pathlen); 783*0Sstevel@tonic-gate kmem_free(fnip->fi_map, fnip->fi_maplen); 784*0Sstevel@tonic-gate kmem_free(fnip->fi_subdir, fnip->fi_subdirlen); 785*0Sstevel@tonic-gate kmem_free(fnip->fi_key, fnip->fi_keylen); 786*0Sstevel@tonic-gate kmem_free(fnip->fi_opts, fnip->fi_optslen); 787*0Sstevel@tonic-gate kmem_free(fnip, sizeof (*fnip)); 788*0Sstevel@tonic-gate AUTOFS_DPRINT((5, "auto_unmount: return=0\n")); 789*0Sstevel@tonic-gate 790*0Sstevel@tonic-gate return (0); 791*0Sstevel@tonic-gate } 792*0Sstevel@tonic-gate 793*0Sstevel@tonic-gate 794*0Sstevel@tonic-gate /* 795*0Sstevel@tonic-gate * find root of autofs 796*0Sstevel@tonic-gate */ 797*0Sstevel@tonic-gate static int 798*0Sstevel@tonic-gate auto_root(vfs_t *vfsp, vnode_t **vpp) 799*0Sstevel@tonic-gate { 800*0Sstevel@tonic-gate *vpp = (vnode_t *)vfstofni(vfsp)->fi_rootvp; 801*0Sstevel@tonic-gate VN_HOLD(*vpp); 802*0Sstevel@tonic-gate 803*0Sstevel@tonic-gate AUTOFS_DPRINT((5, "auto_root: vfs %p, *vpp %p\n", (void *)vfsp, 804*0Sstevel@tonic-gate (void *)*vpp)); 805*0Sstevel@tonic-gate return (0); 806*0Sstevel@tonic-gate } 807*0Sstevel@tonic-gate 808*0Sstevel@tonic-gate /* 809*0Sstevel@tonic-gate * Get file system statistics. 810*0Sstevel@tonic-gate */ 811*0Sstevel@tonic-gate static int 812*0Sstevel@tonic-gate auto_statvfs(vfs_t *vfsp, struct statvfs64 *sbp) 813*0Sstevel@tonic-gate { 814*0Sstevel@tonic-gate dev32_t d32; 815*0Sstevel@tonic-gate 816*0Sstevel@tonic-gate AUTOFS_DPRINT((4, "auto_statvfs %p\n", (void *)vfsp)); 817*0Sstevel@tonic-gate 818*0Sstevel@tonic-gate bzero(sbp, sizeof (*sbp)); 819*0Sstevel@tonic-gate sbp->f_bsize = vfsp->vfs_bsize; 820*0Sstevel@tonic-gate sbp->f_frsize = sbp->f_bsize; 821*0Sstevel@tonic-gate sbp->f_blocks = (fsblkcnt64_t)0; 822*0Sstevel@tonic-gate sbp->f_bfree = (fsblkcnt64_t)0; 823*0Sstevel@tonic-gate sbp->f_bavail = (fsblkcnt64_t)0; 824*0Sstevel@tonic-gate sbp->f_files = (fsfilcnt64_t)0; 825*0Sstevel@tonic-gate sbp->f_ffree = (fsfilcnt64_t)0; 826*0Sstevel@tonic-gate sbp->f_favail = (fsfilcnt64_t)0; 827*0Sstevel@tonic-gate (void) cmpldev(&d32, vfsp->vfs_dev); 828*0Sstevel@tonic-gate sbp->f_fsid = d32; 829*0Sstevel@tonic-gate (void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name); 830*0Sstevel@tonic-gate sbp->f_flag = vf_to_stf(vfsp->vfs_flag); 831*0Sstevel@tonic-gate sbp->f_namemax = MAXNAMELEN; 832*0Sstevel@tonic-gate (void) strcpy(sbp->f_fstr, MNTTYPE_AUTOFS); 833*0Sstevel@tonic-gate 834*0Sstevel@tonic-gate return (0); 835*0Sstevel@tonic-gate } 836