tmpfs_vnops.c revision 183214
1171802Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2170808Sdelphij 3182739Sdelphij/*- 4171802Sdelphij * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 20170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 31170808Sdelphij */ 32170808Sdelphij 33170808Sdelphij/* 34170808Sdelphij * tmpfs vnode interface. 35170808Sdelphij */ 36170808Sdelphij#include <sys/cdefs.h> 37170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 183214 2008-09-20 19:49:15Z kib $"); 38170808Sdelphij 39170808Sdelphij#include <sys/param.h> 40170808Sdelphij#include <sys/fcntl.h> 41170808Sdelphij#include <sys/lockf.h> 42170808Sdelphij#include <sys/namei.h> 43170808Sdelphij#include <sys/priv.h> 44170808Sdelphij#include <sys/proc.h> 45170808Sdelphij#include <sys/resourcevar.h> 46170808Sdelphij#include <sys/stat.h> 47170808Sdelphij#include <sys/systm.h> 48170808Sdelphij#include <sys/unistd.h> 49170808Sdelphij#include <sys/vnode.h> 50170808Sdelphij 51170808Sdelphij#include <vm/vm.h> 52170808Sdelphij#include <vm/vm_object.h> 53170808Sdelphij#include <vm/vm_page.h> 54170808Sdelphij#include <vm/vm_pager.h> 55170808Sdelphij#include <sys/sched.h> 56170808Sdelphij#include <sys/sf_buf.h> 57170808Sdelphij#include <machine/_inttypes.h> 58170808Sdelphij 59170808Sdelphij#include <fs/fifofs/fifo.h> 60170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 61170808Sdelphij#include <fs/tmpfs/tmpfs.h> 62170808Sdelphij 63170808Sdelphij/* --------------------------------------------------------------------- */ 64170808Sdelphij 65171069Sdelphijstatic int 66170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 67170808Sdelphij{ 68170808Sdelphij struct vnode *dvp = v->a_dvp; 69170808Sdelphij struct vnode **vpp = v->a_vpp; 70170808Sdelphij struct componentname *cnp = v->a_cnp; 71170808Sdelphij struct thread *td = cnp->cn_thread; 72170808Sdelphij 73170808Sdelphij int error; 74170808Sdelphij struct tmpfs_dirent *de; 75170808Sdelphij struct tmpfs_node *dnode; 76170808Sdelphij 77170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 78170808Sdelphij *vpp = NULLVP; 79170808Sdelphij 80170808Sdelphij /* Check accessibility of requested node as a first step. */ 81170808Sdelphij error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 82170808Sdelphij if (error != 0) 83170808Sdelphij goto out; 84170808Sdelphij 85170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 86170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 87170808Sdelphij dnode->tn_dir.tn_parent == dnode, 88170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 89170808Sdelphij 90170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 91171799Sdelphij int ltype = 0; 92171799Sdelphij 93176559Sattilio ltype = VOP_ISLOCKED(dvp); 94171802Sdelphij vhold(dvp); 95175294Sattilio VOP_UNLOCK(dvp, 0); 96170808Sdelphij /* Allocate a new vnode on the matching entry. */ 97171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 98171799Sdelphij cnp->cn_lkflags, vpp, td); 99170808Sdelphij 100175202Sattilio vn_lock(dvp, ltype | LK_RETRY); 101171802Sdelphij vdrop(dvp); 102170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 103170808Sdelphij VREF(dvp); 104170808Sdelphij *vpp = dvp; 105170808Sdelphij error = 0; 106170808Sdelphij } else { 107170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 108170808Sdelphij if (de == NULL) { 109170808Sdelphij /* The entry was not found in the directory. 110170808Sdelphij * This is OK if we are creating or renaming an 111170808Sdelphij * entry and are working on the last component of 112170808Sdelphij * the path name. */ 113170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 114170808Sdelphij (cnp->cn_nameiop == CREATE || \ 115170808Sdelphij cnp->cn_nameiop == RENAME)) { 116170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 117170808Sdelphij cnp->cn_thread); 118170808Sdelphij if (error != 0) 119170808Sdelphij goto out; 120170808Sdelphij 121170808Sdelphij /* Keep the component name in the buffer for 122170808Sdelphij * future uses. */ 123170808Sdelphij cnp->cn_flags |= SAVENAME; 124170808Sdelphij 125170808Sdelphij error = EJUSTRETURN; 126170808Sdelphij } else 127170808Sdelphij error = ENOENT; 128170808Sdelphij } else { 129170808Sdelphij struct tmpfs_node *tnode; 130170808Sdelphij 131170808Sdelphij /* The entry was found, so get its associated 132170808Sdelphij * tmpfs_node. */ 133170808Sdelphij tnode = de->td_node; 134170808Sdelphij 135170808Sdelphij /* If we are not at the last path component and 136170808Sdelphij * found a non-directory or non-link entry (which 137170808Sdelphij * may itself be pointing to a directory), raise 138170808Sdelphij * an error. */ 139170808Sdelphij if ((tnode->tn_type != VDIR && 140170808Sdelphij tnode->tn_type != VLNK) && 141170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 142170808Sdelphij error = ENOTDIR; 143170808Sdelphij goto out; 144170808Sdelphij } 145170808Sdelphij 146170808Sdelphij /* If we are deleting or renaming the entry, keep 147170808Sdelphij * track of its tmpfs_dirent so that it can be 148170808Sdelphij * easily deleted later. */ 149170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 150170808Sdelphij (cnp->cn_nameiop == DELETE || 151170808Sdelphij cnp->cn_nameiop == RENAME)) { 152170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 153170808Sdelphij cnp->cn_thread); 154170808Sdelphij if (error != 0) 155170808Sdelphij goto out; 156171070Sdelphij 157170808Sdelphij /* Allocate a new vnode on the matching entry. */ 158171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 159171799Sdelphij cnp->cn_lkflags, vpp, td); 160170808Sdelphij if (error != 0) 161170808Sdelphij goto out; 162170808Sdelphij 163170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 164170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 165170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 166170808Sdelphij error = EPERM; 167170808Sdelphij vput(*vpp); 168170808Sdelphij *vpp = NULL; 169170808Sdelphij goto out; 170171070Sdelphij } 171170808Sdelphij cnp->cn_flags |= SAVENAME; 172171799Sdelphij } else { 173171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 174171799Sdelphij cnp->cn_lkflags, vpp, td); 175170808Sdelphij } 176170808Sdelphij } 177170808Sdelphij } 178170808Sdelphij 179170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 180170808Sdelphij * request was for creation, as it does not improve timings on 181170808Sdelphij * emprical tests. */ 182170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 183170808Sdelphij cache_enter(dvp, *vpp, cnp); 184170808Sdelphij 185170808Sdelphijout: 186170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 187170808Sdelphij * locked. */ 188176559Sattilio MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 189170808Sdelphij 190170808Sdelphij return error; 191170808Sdelphij} 192170808Sdelphij 193170808Sdelphij/* --------------------------------------------------------------------- */ 194170808Sdelphij 195171069Sdelphijstatic int 196170808Sdelphijtmpfs_create(struct vop_create_args *v) 197170808Sdelphij{ 198170808Sdelphij struct vnode *dvp = v->a_dvp; 199170808Sdelphij struct vnode **vpp = v->a_vpp; 200170808Sdelphij struct componentname *cnp = v->a_cnp; 201170808Sdelphij struct vattr *vap = v->a_vap; 202170808Sdelphij 203170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 204170808Sdelphij 205170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 206170808Sdelphij} 207170808Sdelphij/* --------------------------------------------------------------------- */ 208170808Sdelphij 209171069Sdelphijstatic int 210170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 211170808Sdelphij{ 212170808Sdelphij struct vnode *dvp = v->a_dvp; 213170808Sdelphij struct vnode **vpp = v->a_vpp; 214170808Sdelphij struct componentname *cnp = v->a_cnp; 215170808Sdelphij struct vattr *vap = v->a_vap; 216170808Sdelphij 217170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 218170808Sdelphij vap->va_type != VFIFO) 219170808Sdelphij return EINVAL; 220170808Sdelphij 221170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 222170808Sdelphij} 223170808Sdelphij 224170808Sdelphij/* --------------------------------------------------------------------- */ 225170808Sdelphij 226171069Sdelphijstatic int 227170808Sdelphijtmpfs_open(struct vop_open_args *v) 228170808Sdelphij{ 229170808Sdelphij struct vnode *vp = v->a_vp; 230170808Sdelphij int mode = v->a_mode; 231170808Sdelphij 232170808Sdelphij int error; 233170808Sdelphij struct tmpfs_node *node; 234170808Sdelphij 235176559Sattilio MPASS(VOP_ISLOCKED(vp)); 236170808Sdelphij 237170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 238171070Sdelphij 239170808Sdelphij /* The file is still active but all its names have been removed 240170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 241170808Sdelphij * it is about to die. */ 242170808Sdelphij if (node->tn_links < 1) 243170808Sdelphij return (ENOENT); 244170808Sdelphij 245170808Sdelphij /* If the file is marked append-only, deny write requests. */ 246170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 247170808Sdelphij error = EPERM; 248170808Sdelphij else { 249170808Sdelphij error = 0; 250171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 251170808Sdelphij } 252170808Sdelphij 253176559Sattilio MPASS(VOP_ISLOCKED(vp)); 254170808Sdelphij return error; 255170808Sdelphij} 256170808Sdelphij 257170808Sdelphij/* --------------------------------------------------------------------- */ 258170808Sdelphij 259171069Sdelphijstatic int 260170808Sdelphijtmpfs_close(struct vop_close_args *v) 261170808Sdelphij{ 262170808Sdelphij struct vnode *vp = v->a_vp; 263170808Sdelphij 264170808Sdelphij struct tmpfs_node *node; 265170808Sdelphij 266176559Sattilio MPASS(VOP_ISLOCKED(vp)); 267170808Sdelphij 268170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 269170808Sdelphij 270170808Sdelphij if (node->tn_links > 0) { 271170808Sdelphij /* Update node times. No need to do it if the node has 272170808Sdelphij * been deleted, because it will vanish after we return. */ 273170808Sdelphij tmpfs_update(vp); 274170808Sdelphij } 275170808Sdelphij 276170808Sdelphij return 0; 277170808Sdelphij} 278170808Sdelphij 279170808Sdelphij/* --------------------------------------------------------------------- */ 280170808Sdelphij 281170808Sdelphijint 282170808Sdelphijtmpfs_access(struct vop_access_args *v) 283170808Sdelphij{ 284170808Sdelphij struct vnode *vp = v->a_vp; 285170808Sdelphij int mode = v->a_mode; 286170808Sdelphij struct ucred *cred = v->a_cred; 287170808Sdelphij 288170808Sdelphij int error; 289170808Sdelphij struct tmpfs_node *node; 290170808Sdelphij 291176559Sattilio MPASS(VOP_ISLOCKED(vp)); 292170808Sdelphij 293170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 294170808Sdelphij 295170808Sdelphij switch (vp->v_type) { 296170808Sdelphij case VDIR: 297170808Sdelphij /* FALLTHROUGH */ 298170808Sdelphij case VLNK: 299170808Sdelphij /* FALLTHROUGH */ 300170808Sdelphij case VREG: 301170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 302170808Sdelphij error = EROFS; 303170808Sdelphij goto out; 304170808Sdelphij } 305170808Sdelphij break; 306170808Sdelphij 307170808Sdelphij case VBLK: 308170808Sdelphij /* FALLTHROUGH */ 309170808Sdelphij case VCHR: 310170808Sdelphij /* FALLTHROUGH */ 311170808Sdelphij case VSOCK: 312170808Sdelphij /* FALLTHROUGH */ 313170808Sdelphij case VFIFO: 314170808Sdelphij break; 315170808Sdelphij 316170808Sdelphij default: 317170808Sdelphij error = EINVAL; 318170808Sdelphij goto out; 319170808Sdelphij } 320170808Sdelphij 321170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 322170808Sdelphij error = EPERM; 323170808Sdelphij goto out; 324170808Sdelphij } 325170808Sdelphij 326170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 327170808Sdelphij node->tn_gid, mode, cred, NULL); 328170808Sdelphij 329170808Sdelphijout: 330176559Sattilio MPASS(VOP_ISLOCKED(vp)); 331170808Sdelphij 332170808Sdelphij return error; 333170808Sdelphij} 334170808Sdelphij 335170808Sdelphij/* --------------------------------------------------------------------- */ 336170808Sdelphij 337170808Sdelphijint 338170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 339170808Sdelphij{ 340170808Sdelphij struct vnode *vp = v->a_vp; 341170808Sdelphij struct vattr *vap = v->a_vap; 342170808Sdelphij 343170808Sdelphij struct tmpfs_node *node; 344170808Sdelphij 345170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 346170808Sdelphij 347170808Sdelphij VATTR_NULL(vap); 348170808Sdelphij 349170808Sdelphij tmpfs_update(vp); 350170808Sdelphij 351170808Sdelphij vap->va_type = vp->v_type; 352170808Sdelphij vap->va_mode = node->tn_mode; 353170808Sdelphij vap->va_nlink = node->tn_links; 354170808Sdelphij vap->va_uid = node->tn_uid; 355170808Sdelphij vap->va_gid = node->tn_gid; 356170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 357170808Sdelphij vap->va_fileid = node->tn_id; 358170808Sdelphij vap->va_size = node->tn_size; 359170808Sdelphij vap->va_blocksize = PAGE_SIZE; 360170808Sdelphij vap->va_atime = node->tn_atime; 361170808Sdelphij vap->va_mtime = node->tn_mtime; 362170808Sdelphij vap->va_ctime = node->tn_ctime; 363170808Sdelphij vap->va_birthtime = node->tn_birthtime; 364170808Sdelphij vap->va_gen = node->tn_gen; 365170808Sdelphij vap->va_flags = node->tn_flags; 366170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 367183214Skib node->tn_rdev : NODEV; 368170808Sdelphij vap->va_bytes = round_page(node->tn_size); 369183212Skib vap->va_filerev = 0; 370170808Sdelphij 371170808Sdelphij return 0; 372170808Sdelphij} 373170808Sdelphij 374170808Sdelphij/* --------------------------------------------------------------------- */ 375170808Sdelphij 376170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 377170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 378170808Sdelphijint 379170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 380170808Sdelphij{ 381170808Sdelphij struct vnode *vp = v->a_vp; 382170808Sdelphij struct vattr *vap = v->a_vap; 383170808Sdelphij struct ucred *cred = v->a_cred; 384182371Sattilio struct thread *td = curthread; 385170808Sdelphij 386170808Sdelphij int error; 387170808Sdelphij 388176559Sattilio MPASS(VOP_ISLOCKED(vp)); 389170808Sdelphij 390170808Sdelphij error = 0; 391170808Sdelphij 392170808Sdelphij /* Abort if any unsettable attribute is given. */ 393170808Sdelphij if (vap->va_type != VNON || 394170808Sdelphij vap->va_nlink != VNOVAL || 395170808Sdelphij vap->va_fsid != VNOVAL || 396170808Sdelphij vap->va_fileid != VNOVAL || 397170808Sdelphij vap->va_blocksize != VNOVAL || 398170808Sdelphij vap->va_gen != VNOVAL || 399170808Sdelphij vap->va_rdev != VNOVAL || 400170808Sdelphij vap->va_bytes != VNOVAL) 401170808Sdelphij error = EINVAL; 402170808Sdelphij 403170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 404182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 405170808Sdelphij 406170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 407182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 408170808Sdelphij 409170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 410182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 411170808Sdelphij 412170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 413182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 414170808Sdelphij 415170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 416170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 417170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 418170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 419170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 420170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 421171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 422182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 423170808Sdelphij 424170808Sdelphij /* Update the node times. We give preference to the error codes 425170808Sdelphij * generated by this function rather than the ones that may arise 426170808Sdelphij * from tmpfs_update. */ 427170808Sdelphij tmpfs_update(vp); 428170808Sdelphij 429176559Sattilio MPASS(VOP_ISLOCKED(vp)); 430170808Sdelphij 431170808Sdelphij return error; 432170808Sdelphij} 433170808Sdelphij 434170808Sdelphij/* --------------------------------------------------------------------- */ 435171489Sdelphij 436170808Sdelphijstatic int 437171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 438170808Sdelphij{ 439171489Sdelphij vm_pindex_t idx; 440171489Sdelphij vm_page_t m; 441171489Sdelphij struct sf_buf *sf; 442171489Sdelphij off_t offset, addr; 443171489Sdelphij size_t tlen; 444171489Sdelphij caddr_t va; 445171489Sdelphij int error; 446170808Sdelphij 447171489Sdelphij addr = uio->uio_offset; 448171489Sdelphij idx = OFF_TO_IDX(addr); 449171489Sdelphij offset = addr & PAGE_MASK; 450171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 451170808Sdelphij 452171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 453171489Sdelphij goto nocache; 454170808Sdelphij 455171489Sdelphij VM_OBJECT_LOCK(vobj); 456171489Sdelphijlookupvpg: 457171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 458171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 459171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 460171489Sdelphij goto lookupvpg; 461171489Sdelphij vm_page_busy(m); 462171489Sdelphij VM_OBJECT_UNLOCK(vobj); 463170808Sdelphij sched_pin(); 464170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 465171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 466171489Sdelphij error = uiomove(va + offset, tlen, uio); 467170808Sdelphij sf_buf_free(sf); 468170808Sdelphij sched_unpin(); 469171489Sdelphij VM_OBJECT_LOCK(vobj); 470171489Sdelphij vm_page_wakeup(m); 471171489Sdelphij VM_OBJECT_UNLOCK(vobj); 472171489Sdelphij return (error); 473171799Sdelphij } 474171489Sdelphij VM_OBJECT_UNLOCK(vobj); 475171489Sdelphijnocache: 476171489Sdelphij VM_OBJECT_LOCK(tobj); 477171489Sdelphij vm_object_pip_add(tobj, 1); 478171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 479171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 480171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 481171489Sdelphij int behind, ahead; 482171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 483171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 484171489Sdelphij if (error != 0) { 485171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 486171489Sdelphij goto out; 487171489Sdelphij } 488171489Sdelphij } else 489170808Sdelphij vm_page_zero_invalid(m, TRUE); 490170808Sdelphij } 491171489Sdelphij VM_OBJECT_UNLOCK(tobj); 492171489Sdelphij sched_pin(); 493171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 494171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 495171489Sdelphij error = uiomove(va + offset, tlen, uio); 496171489Sdelphij sf_buf_free(sf); 497171489Sdelphij sched_unpin(); 498171489Sdelphij VM_OBJECT_LOCK(tobj); 499171308Sdelphijout: 500171489Sdelphij vm_page_lock_queues(); 501171489Sdelphij vm_page_unwire(m, 0); 502171489Sdelphij vm_page_activate(m); 503171489Sdelphij vm_page_unlock_queues(); 504171489Sdelphij vm_page_wakeup(m); 505171489Sdelphij vm_object_pip_subtract(tobj, 1); 506171489Sdelphij VM_OBJECT_UNLOCK(tobj); 507171489Sdelphij 508171489Sdelphij return (error); 509170808Sdelphij} 510170808Sdelphij 511171069Sdelphijstatic int 512170808Sdelphijtmpfs_read(struct vop_read_args *v) 513170808Sdelphij{ 514170808Sdelphij struct vnode *vp = v->a_vp; 515170808Sdelphij struct uio *uio = v->a_uio; 516170808Sdelphij 517170808Sdelphij struct tmpfs_node *node; 518170808Sdelphij vm_object_t uobj; 519171489Sdelphij size_t len; 520171489Sdelphij int resid; 521170808Sdelphij 522174265Swkoszek int error = 0; 523170808Sdelphij 524170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 525170808Sdelphij 526170808Sdelphij if (vp->v_type != VREG) { 527170808Sdelphij error = EISDIR; 528170808Sdelphij goto out; 529170808Sdelphij } 530170808Sdelphij 531170808Sdelphij if (uio->uio_offset < 0) { 532170808Sdelphij error = EINVAL; 533170808Sdelphij goto out; 534170808Sdelphij } 535170808Sdelphij 536170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 537170808Sdelphij 538170808Sdelphij uobj = node->tn_reg.tn_aobj; 539171489Sdelphij while ((resid = uio->uio_resid) > 0) { 540171489Sdelphij error = 0; 541171489Sdelphij if (node->tn_size <= uio->uio_offset) 542171489Sdelphij break; 543171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 544171489Sdelphij if (len == 0) 545171489Sdelphij break; 546171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 547171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 548171489Sdelphij break; 549171489Sdelphij } 550170808Sdelphij 551170808Sdelphijout: 552170808Sdelphij 553170808Sdelphij return error; 554170808Sdelphij} 555170808Sdelphij 556170808Sdelphij/* --------------------------------------------------------------------- */ 557170808Sdelphij 558171069Sdelphijstatic int 559171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 560171489Sdelphij{ 561171489Sdelphij vm_pindex_t idx; 562171489Sdelphij vm_page_t vpg, tpg; 563171489Sdelphij struct sf_buf *sf; 564171489Sdelphij off_t offset, addr; 565171489Sdelphij size_t tlen; 566171489Sdelphij caddr_t va; 567171489Sdelphij int error; 568171489Sdelphij 569174265Swkoszek error = 0; 570174265Swkoszek 571171489Sdelphij addr = uio->uio_offset; 572171489Sdelphij idx = OFF_TO_IDX(addr); 573171489Sdelphij offset = addr & PAGE_MASK; 574171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 575171489Sdelphij 576171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 577171489Sdelphij vpg = NULL; 578171489Sdelphij goto nocache; 579171489Sdelphij } 580171489Sdelphij 581171489Sdelphij VM_OBJECT_LOCK(vobj); 582171489Sdelphijlookupvpg: 583171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 584171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 585171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 586171489Sdelphij goto lookupvpg; 587171489Sdelphij vm_page_busy(vpg); 588171489Sdelphij vm_page_lock_queues(); 589171489Sdelphij vm_page_undirty(vpg); 590171489Sdelphij vm_page_unlock_queues(); 591171489Sdelphij VM_OBJECT_UNLOCK(vobj); 592171489Sdelphij sched_pin(); 593171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 594171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 595171489Sdelphij error = uiomove(va + offset, tlen, uio); 596171489Sdelphij sf_buf_free(sf); 597171489Sdelphij sched_unpin(); 598171489Sdelphij } else { 599171489Sdelphij VM_OBJECT_UNLOCK(vobj); 600171489Sdelphij vpg = NULL; 601171489Sdelphij } 602171489Sdelphijnocache: 603171489Sdelphij VM_OBJECT_LOCK(tobj); 604171489Sdelphij vm_object_pip_add(tobj, 1); 605171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 606171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 607171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 608171489Sdelphij int behind, ahead; 609171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 610171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 611171489Sdelphij if (error != 0) { 612171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 613171489Sdelphij goto out; 614171489Sdelphij } 615171489Sdelphij } else 616171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 617171489Sdelphij } 618171489Sdelphij VM_OBJECT_UNLOCK(tobj); 619171489Sdelphij if (vpg == NULL) { 620171489Sdelphij sched_pin(); 621171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 622171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 623171489Sdelphij error = uiomove(va + offset, tlen, uio); 624171489Sdelphij sf_buf_free(sf); 625171489Sdelphij sched_unpin(); 626171489Sdelphij } else { 627171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 628171489Sdelphij pmap_copy_page(vpg, tpg); 629171489Sdelphij } 630171489Sdelphij VM_OBJECT_LOCK(tobj); 631171489Sdelphijout: 632171489Sdelphij if (vobj != NULL) 633171489Sdelphij VM_OBJECT_LOCK(vobj); 634171489Sdelphij vm_page_lock_queues(); 635171489Sdelphij if (error == 0) { 636171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 637171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 638171489Sdelphij vm_page_dirty(tpg); 639171489Sdelphij } 640171489Sdelphij vm_page_unwire(tpg, 0); 641171489Sdelphij vm_page_activate(tpg); 642171489Sdelphij vm_page_unlock_queues(); 643171489Sdelphij vm_page_wakeup(tpg); 644171489Sdelphij if (vpg != NULL) 645171489Sdelphij vm_page_wakeup(vpg); 646171489Sdelphij if (vobj != NULL) 647171489Sdelphij VM_OBJECT_UNLOCK(vobj); 648171489Sdelphij vm_object_pip_subtract(tobj, 1); 649171489Sdelphij VM_OBJECT_UNLOCK(tobj); 650171489Sdelphij 651171489Sdelphij return (error); 652171489Sdelphij} 653171489Sdelphij 654171489Sdelphijstatic int 655170808Sdelphijtmpfs_write(struct vop_write_args *v) 656170808Sdelphij{ 657170808Sdelphij struct vnode *vp = v->a_vp; 658170808Sdelphij struct uio *uio = v->a_uio; 659170808Sdelphij int ioflag = v->a_ioflag; 660170808Sdelphij struct thread *td = uio->uio_td; 661170808Sdelphij 662170808Sdelphij boolean_t extended; 663171489Sdelphij int error = 0; 664170808Sdelphij off_t oldsize; 665170808Sdelphij struct tmpfs_node *node; 666170808Sdelphij vm_object_t uobj; 667171489Sdelphij size_t len; 668171489Sdelphij int resid; 669170808Sdelphij 670170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 671170808Sdelphij oldsize = node->tn_size; 672170808Sdelphij 673170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 674170808Sdelphij error = EINVAL; 675170808Sdelphij goto out; 676170808Sdelphij } 677170808Sdelphij 678170808Sdelphij if (uio->uio_resid == 0) { 679170808Sdelphij error = 0; 680170808Sdelphij goto out; 681170808Sdelphij } 682170808Sdelphij 683170808Sdelphij if (ioflag & IO_APPEND) 684170808Sdelphij uio->uio_offset = node->tn_size; 685171070Sdelphij 686171070Sdelphij if (uio->uio_offset + uio->uio_resid > 687170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 688170808Sdelphij return (EFBIG); 689170808Sdelphij 690170808Sdelphij if (vp->v_type == VREG && td != NULL) { 691170808Sdelphij PROC_LOCK(td->td_proc); 692170808Sdelphij if (uio->uio_offset + uio->uio_resid > 693170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 694170808Sdelphij psignal(td->td_proc, SIGXFSZ); 695170808Sdelphij PROC_UNLOCK(td->td_proc); 696170808Sdelphij return (EFBIG); 697170808Sdelphij } 698170808Sdelphij PROC_UNLOCK(td->td_proc); 699170808Sdelphij } 700170808Sdelphij 701170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 702170808Sdelphij if (extended) { 703170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 704170808Sdelphij if (error != 0) 705170808Sdelphij goto out; 706170808Sdelphij } 707170808Sdelphij 708170808Sdelphij uobj = node->tn_reg.tn_aobj; 709171489Sdelphij while ((resid = uio->uio_resid) > 0) { 710171489Sdelphij if (node->tn_size <= uio->uio_offset) 711171489Sdelphij break; 712171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 713171489Sdelphij if (len == 0) 714171489Sdelphij break; 715171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 716171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 717171489Sdelphij break; 718171489Sdelphij } 719170808Sdelphij 720170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 721170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 722170808Sdelphij 723170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 724170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 725170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 726170808Sdelphij } 727170808Sdelphij 728170808Sdelphij if (error != 0) 729170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 730170808Sdelphij 731170808Sdelphijout: 732170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 733170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 734170808Sdelphij 735170808Sdelphij return error; 736170808Sdelphij} 737170808Sdelphij 738170808Sdelphij/* --------------------------------------------------------------------- */ 739170808Sdelphij 740171069Sdelphijstatic int 741170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 742170808Sdelphij{ 743170808Sdelphij struct vnode *vp = v->a_vp; 744170808Sdelphij 745176559Sattilio MPASS(VOP_ISLOCKED(vp)); 746170808Sdelphij 747170808Sdelphij tmpfs_update(vp); 748170808Sdelphij 749170808Sdelphij return 0; 750170808Sdelphij} 751170808Sdelphij 752170808Sdelphij/* --------------------------------------------------------------------- */ 753170808Sdelphij 754171069Sdelphijstatic int 755170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 756170808Sdelphij{ 757170808Sdelphij struct vnode *dvp = v->a_dvp; 758170808Sdelphij struct vnode *vp = v->a_vp; 759170808Sdelphij 760170808Sdelphij int error; 761170808Sdelphij struct tmpfs_dirent *de; 762170808Sdelphij struct tmpfs_mount *tmp; 763170808Sdelphij struct tmpfs_node *dnode; 764170808Sdelphij struct tmpfs_node *node; 765170808Sdelphij 766176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 767176559Sattilio MPASS(VOP_ISLOCKED(vp)); 768170808Sdelphij 769170808Sdelphij if (vp->v_type == VDIR) { 770170808Sdelphij error = EISDIR; 771170808Sdelphij goto out; 772170808Sdelphij } 773170808Sdelphij 774170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 775170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 776170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 777173725Sdelphij de = tmpfs_dir_search(dnode, node); 778170808Sdelphij MPASS(de != NULL); 779170808Sdelphij 780170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 781170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 782170808Sdelphij (dnode->tn_flags & APPEND)) { 783170808Sdelphij error = EPERM; 784170808Sdelphij goto out; 785170808Sdelphij } 786170808Sdelphij 787170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 788170808Sdelphij * have to change the number of hard links of the directory. */ 789170808Sdelphij tmpfs_dir_detach(dvp, de); 790170808Sdelphij 791170808Sdelphij /* Free the directory entry we just deleted. Note that the node 792170808Sdelphij * referred by it will not be removed until the vnode is really 793170808Sdelphij * reclaimed. */ 794170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 795170808Sdelphij 796170808Sdelphij if (node->tn_links > 0) 797170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 798170808Sdelphij TMPFS_NODE_MODIFIED; 799170808Sdelphij error = 0; 800170808Sdelphij 801170808Sdelphijout: 802170808Sdelphij 803170808Sdelphij return error; 804170808Sdelphij} 805170808Sdelphij 806170808Sdelphij/* --------------------------------------------------------------------- */ 807170808Sdelphij 808171069Sdelphijstatic int 809170808Sdelphijtmpfs_link(struct vop_link_args *v) 810170808Sdelphij{ 811170808Sdelphij struct vnode *dvp = v->a_tdvp; 812170808Sdelphij struct vnode *vp = v->a_vp; 813170808Sdelphij struct componentname *cnp = v->a_cnp; 814170808Sdelphij 815170808Sdelphij int error; 816170808Sdelphij struct tmpfs_dirent *de; 817170808Sdelphij struct tmpfs_node *node; 818170808Sdelphij 819176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 820170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 821170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 822170808Sdelphij 823170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 824170808Sdelphij 825170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 826170808Sdelphij 827170808Sdelphij /* Hard links of directories are forbidden. */ 828170808Sdelphij if (vp->v_type == VDIR) { 829170808Sdelphij error = EPERM; 830170808Sdelphij goto out; 831170808Sdelphij } 832170808Sdelphij 833170808Sdelphij /* Cannot create cross-device links. */ 834170808Sdelphij if (dvp->v_mount != vp->v_mount) { 835170808Sdelphij error = EXDEV; 836170808Sdelphij goto out; 837170808Sdelphij } 838170808Sdelphij 839170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 840170808Sdelphij * by the system. */ 841170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 842170808Sdelphij if (node->tn_links == LINK_MAX) { 843170808Sdelphij error = EMLINK; 844170808Sdelphij goto out; 845170808Sdelphij } 846170808Sdelphij 847170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 848170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 849170808Sdelphij error = EPERM; 850170808Sdelphij goto out; 851170808Sdelphij } 852170808Sdelphij 853170808Sdelphij /* Allocate a new directory entry to represent the node. */ 854170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 855170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 856170808Sdelphij if (error != 0) 857170808Sdelphij goto out; 858170808Sdelphij 859170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 860170808Sdelphij tmpfs_dir_attach(dvp, de); 861170808Sdelphij 862170808Sdelphij /* vp link count has changed, so update node times. */ 863170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 864170808Sdelphij tmpfs_update(vp); 865170808Sdelphij 866170808Sdelphij error = 0; 867171070Sdelphij 868170808Sdelphijout: 869170808Sdelphij return error; 870170808Sdelphij} 871170808Sdelphij 872170808Sdelphij/* --------------------------------------------------------------------- */ 873170808Sdelphij 874171069Sdelphijstatic int 875170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 876170808Sdelphij{ 877170808Sdelphij struct vnode *fdvp = v->a_fdvp; 878170808Sdelphij struct vnode *fvp = v->a_fvp; 879170808Sdelphij struct componentname *fcnp = v->a_fcnp; 880170808Sdelphij struct vnode *tdvp = v->a_tdvp; 881170808Sdelphij struct vnode *tvp = v->a_tvp; 882170808Sdelphij struct componentname *tcnp = v->a_tcnp; 883170808Sdelphij 884170808Sdelphij char *newname; 885170808Sdelphij int error; 886170808Sdelphij struct tmpfs_dirent *de; 887170808Sdelphij struct tmpfs_node *fdnode; 888170808Sdelphij struct tmpfs_node *fnode; 889171799Sdelphij struct tmpfs_node *tnode; 890170808Sdelphij struct tmpfs_node *tdnode; 891170808Sdelphij 892176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 893176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 894170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 895170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 896170808Sdelphij 897171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 898170808Sdelphij 899170808Sdelphij /* Disallow cross-device renames. 900170808Sdelphij * XXX Why isn't this done by the caller? */ 901170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 902170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 903170808Sdelphij error = EXDEV; 904170808Sdelphij goto out; 905170808Sdelphij } 906170808Sdelphij 907170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 908170808Sdelphij 909170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 910170808Sdelphij if (fvp == tvp) { 911170808Sdelphij error = 0; 912170808Sdelphij goto out; 913170808Sdelphij } 914170808Sdelphij 915173725Sdelphij /* If we need to move the directory between entries, lock the 916173725Sdelphij * source so that we can safely operate on it. */ 917173725Sdelphij if (tdvp != fdvp) { 918175202Sattilio error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 919173725Sdelphij if (error != 0) 920173725Sdelphij goto out; 921173725Sdelphij } 922173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 923173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 924173725Sdelphij de = tmpfs_dir_search(fdnode, fnode); 925173725Sdelphij 926170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 927170808Sdelphij if (de == NULL) { 928170808Sdelphij MPASS(fvp->v_type == VDIR); 929170808Sdelphij error = EINVAL; 930173725Sdelphij goto out_locked; 931170808Sdelphij } 932170808Sdelphij MPASS(de->td_node == fnode); 933170808Sdelphij 934171070Sdelphij /* If re-naming a directory to another preexisting directory 935170808Sdelphij * ensure that the target directory is empty so that its 936171070Sdelphij * removal causes no side effects. 937170808Sdelphij * Kern_rename gurantees the destination to be a directory 938170808Sdelphij * if the source is one. */ 939170808Sdelphij if (tvp != NULL) { 940171799Sdelphij MPASS(tnode != NULL); 941171070Sdelphij 942170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 943170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 944170808Sdelphij error = EPERM; 945173725Sdelphij goto out_locked; 946170808Sdelphij } 947170808Sdelphij 948171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 949171799Sdelphij if (tnode->tn_size > 0) { 950171799Sdelphij error = ENOTEMPTY; 951173725Sdelphij goto out_locked; 952171799Sdelphij } 953171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 954171799Sdelphij error = ENOTDIR; 955173725Sdelphij goto out_locked; 956171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 957171799Sdelphij error = EISDIR; 958173725Sdelphij goto out_locked; 959171799Sdelphij } else { 960171799Sdelphij MPASS(fnode->tn_type != VDIR && 961171799Sdelphij tnode->tn_type != VDIR); 962170808Sdelphij } 963170808Sdelphij } 964170808Sdelphij 965170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 966170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 967170808Sdelphij error = EPERM; 968170808Sdelphij goto out_locked; 969170808Sdelphij } 970170808Sdelphij 971170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 972170808Sdelphij * has to be changed. */ 973170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 974170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 975171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 976170808Sdelphij } else 977170808Sdelphij newname = NULL; 978170808Sdelphij 979170808Sdelphij /* If the node is being moved to another directory, we have to do 980170808Sdelphij * the move. */ 981170808Sdelphij if (fdnode != tdnode) { 982170808Sdelphij /* In case we are moving a directory, we have to adjust its 983170808Sdelphij * parent to point to the new parent. */ 984170808Sdelphij if (de->td_node->tn_type == VDIR) { 985170808Sdelphij struct tmpfs_node *n; 986170808Sdelphij 987170808Sdelphij /* Ensure the target directory is not a child of the 988170808Sdelphij * directory being moved. Otherwise, we'd end up 989170808Sdelphij * with stale nodes. */ 990170808Sdelphij n = tdnode; 991170808Sdelphij while (n != n->tn_dir.tn_parent) { 992170808Sdelphij if (n == fnode) { 993170808Sdelphij error = EINVAL; 994170808Sdelphij if (newname != NULL) 995171087Sdelphij free(newname, M_TMPFSNAME); 996170808Sdelphij goto out_locked; 997170808Sdelphij } 998170808Sdelphij n = n->tn_dir.tn_parent; 999170808Sdelphij } 1000170808Sdelphij 1001170808Sdelphij /* Adjust the parent pointer. */ 1002170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1003170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1004170808Sdelphij 1005170808Sdelphij /* As a result of changing the target of the '..' 1006170808Sdelphij * entry, the link count of the source and target 1007170808Sdelphij * directories has to be adjusted. */ 1008170808Sdelphij fdnode->tn_links--; 1009170808Sdelphij tdnode->tn_links++; 1010170808Sdelphij } 1011170808Sdelphij 1012170808Sdelphij /* Do the move: just remove the entry from the source directory 1013170808Sdelphij * and insert it into the target one. */ 1014170808Sdelphij tmpfs_dir_detach(fdvp, de); 1015170808Sdelphij tmpfs_dir_attach(tdvp, de); 1016170808Sdelphij } 1017170808Sdelphij 1018170808Sdelphij /* If the name has changed, we need to make it effective by changing 1019170808Sdelphij * it in the directory entry. */ 1020170808Sdelphij if (newname != NULL) { 1021170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1022170808Sdelphij 1023171087Sdelphij free(de->td_name, M_TMPFSNAME); 1024170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1025170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1026170808Sdelphij de->td_name = newname; 1027170808Sdelphij 1028170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1029170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1030170808Sdelphij } 1031170808Sdelphij 1032170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1033170808Sdelphij * from the target directory. */ 1034170808Sdelphij if (tvp != NULL) { 1035170808Sdelphij /* Remove the old entry from the target directory. */ 1036173725Sdelphij de = tmpfs_dir_search(tdnode, tnode); 1037170808Sdelphij tmpfs_dir_detach(tdvp, de); 1038170808Sdelphij 1039170808Sdelphij /* Free the directory entry we just deleted. Note that the 1040170808Sdelphij * node referred by it will not be removed until the vnode is 1041170808Sdelphij * really reclaimed. */ 1042170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1043170808Sdelphij } 1044170808Sdelphij 1045170808Sdelphij error = 0; 1046170808Sdelphij 1047170808Sdelphijout_locked: 1048170808Sdelphij if (fdnode != tdnode) 1049175294Sattilio VOP_UNLOCK(fdvp, 0); 1050170808Sdelphij 1051170808Sdelphijout: 1052170808Sdelphij /* Release target nodes. */ 1053170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1054170808Sdelphij * other code takes care of this... */ 1055170808Sdelphij if (tdvp == tvp) 1056170808Sdelphij vrele(tdvp); 1057170808Sdelphij else 1058170808Sdelphij vput(tdvp); 1059170808Sdelphij if (tvp != NULL) 1060170808Sdelphij vput(tvp); 1061170808Sdelphij 1062170808Sdelphij /* Release source nodes. */ 1063170808Sdelphij vrele(fdvp); 1064170808Sdelphij vrele(fvp); 1065170808Sdelphij 1066170808Sdelphij return error; 1067170808Sdelphij} 1068170808Sdelphij 1069170808Sdelphij/* --------------------------------------------------------------------- */ 1070170808Sdelphij 1071171069Sdelphijstatic int 1072170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1073170808Sdelphij{ 1074170808Sdelphij struct vnode *dvp = v->a_dvp; 1075170808Sdelphij struct vnode **vpp = v->a_vpp; 1076170808Sdelphij struct componentname *cnp = v->a_cnp; 1077170808Sdelphij struct vattr *vap = v->a_vap; 1078170808Sdelphij 1079170808Sdelphij MPASS(vap->va_type == VDIR); 1080170808Sdelphij 1081170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1082170808Sdelphij} 1083170808Sdelphij 1084170808Sdelphij/* --------------------------------------------------------------------- */ 1085170808Sdelphij 1086171069Sdelphijstatic int 1087170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1088170808Sdelphij{ 1089170808Sdelphij struct vnode *dvp = v->a_dvp; 1090170808Sdelphij struct vnode *vp = v->a_vp; 1091170808Sdelphij 1092170808Sdelphij int error; 1093170808Sdelphij struct tmpfs_dirent *de; 1094170808Sdelphij struct tmpfs_mount *tmp; 1095170808Sdelphij struct tmpfs_node *dnode; 1096170808Sdelphij struct tmpfs_node *node; 1097170808Sdelphij 1098176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1099176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1100170808Sdelphij 1101170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1102170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1103170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1104170808Sdelphij 1105171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1106171070Sdelphij * removed. */ 1107171070Sdelphij if (node->tn_size > 0) { 1108171070Sdelphij error = ENOTEMPTY; 1109171070Sdelphij goto out; 1110171070Sdelphij } 1111170808Sdelphij 1112170808Sdelphij if ((dnode->tn_flags & APPEND) 1113170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1114170808Sdelphij error = EPERM; 1115170808Sdelphij goto out; 1116170808Sdelphij } 1117170808Sdelphij 1118171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1119171070Sdelphij * We checked for that above so this is safe now. */ 1120170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1121170808Sdelphij 1122170808Sdelphij /* Get the directory entry associated with node (vp). This was 1123170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1124173725Sdelphij de = tmpfs_dir_search(dnode, node); 1125170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1126170808Sdelphij v->a_cnp->cn_nameptr, 1127170808Sdelphij v->a_cnp->cn_namelen)); 1128170808Sdelphij 1129170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1130170808Sdelphij if (dnode->tn_flags & APPEND 1131170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1132170808Sdelphij error = EPERM; 1133170808Sdelphij goto out; 1134170808Sdelphij } 1135170808Sdelphij 1136170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1137170808Sdelphij tmpfs_dir_detach(dvp, de); 1138170808Sdelphij 1139170808Sdelphij node->tn_links--; 1140170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1141170808Sdelphij TMPFS_NODE_MODIFIED; 1142170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1143170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1144170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1145170808Sdelphij 1146171070Sdelphij cache_purge(dvp); 1147170808Sdelphij cache_purge(vp); 1148170808Sdelphij 1149170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1150170808Sdelphij * referred by it will not be removed until the vnode is really 1151170808Sdelphij * reclaimed. */ 1152170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1153170808Sdelphij 1154170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1155170808Sdelphij * interested parties and clean it from the cache). */ 1156170808Sdelphij 1157170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1158170808Sdelphij tmpfs_update(dvp); 1159170808Sdelphij 1160170808Sdelphij error = 0; 1161170808Sdelphij 1162170808Sdelphijout: 1163170808Sdelphij return error; 1164170808Sdelphij} 1165170808Sdelphij 1166170808Sdelphij/* --------------------------------------------------------------------- */ 1167170808Sdelphij 1168171069Sdelphijstatic int 1169170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1170170808Sdelphij{ 1171170808Sdelphij struct vnode *dvp = v->a_dvp; 1172170808Sdelphij struct vnode **vpp = v->a_vpp; 1173170808Sdelphij struct componentname *cnp = v->a_cnp; 1174170808Sdelphij struct vattr *vap = v->a_vap; 1175170808Sdelphij char *target = v->a_target; 1176170808Sdelphij 1177170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1178170808Sdelphij MPASS(vap->va_type == VLNK); 1179170808Sdelphij#else 1180170808Sdelphij vap->va_type = VLNK; 1181170808Sdelphij#endif 1182170808Sdelphij 1183170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1184170808Sdelphij} 1185170808Sdelphij 1186170808Sdelphij/* --------------------------------------------------------------------- */ 1187170808Sdelphij 1188171069Sdelphijstatic int 1189170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1190170808Sdelphij{ 1191170808Sdelphij struct vnode *vp = v->a_vp; 1192170808Sdelphij struct uio *uio = v->a_uio; 1193170808Sdelphij int *eofflag = v->a_eofflag; 1194170808Sdelphij u_long **cookies = v->a_cookies; 1195170808Sdelphij int *ncookies = v->a_ncookies; 1196170808Sdelphij 1197170808Sdelphij int error; 1198170808Sdelphij off_t startoff; 1199171802Sdelphij off_t cnt = 0; 1200170808Sdelphij struct tmpfs_node *node; 1201170808Sdelphij 1202170808Sdelphij /* This operation only makes sense on directory nodes. */ 1203171802Sdelphij if (vp->v_type != VDIR) 1204171802Sdelphij return ENOTDIR; 1205170808Sdelphij 1206170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1207170808Sdelphij 1208170808Sdelphij startoff = uio->uio_offset; 1209170808Sdelphij 1210171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1211170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1212171862Sdelphij if (error != 0) 1213171862Sdelphij goto outok; 1214171862Sdelphij cnt++; 1215171862Sdelphij } 1216171862Sdelphij 1217171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1218170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1219171862Sdelphij if (error != 0) 1220171862Sdelphij goto outok; 1221171862Sdelphij cnt++; 1222170808Sdelphij } 1223170808Sdelphij 1224171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1225171862Sdelphij 1226171862Sdelphijoutok: 1227171862Sdelphij MPASS(error >= -1); 1228171862Sdelphij 1229170808Sdelphij if (error == -1) 1230170808Sdelphij error = 0; 1231170808Sdelphij 1232170808Sdelphij if (eofflag != NULL) 1233170808Sdelphij *eofflag = 1234170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1235170808Sdelphij 1236170808Sdelphij /* Update NFS-related variables. */ 1237170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1238170808Sdelphij off_t i; 1239170808Sdelphij off_t off = startoff; 1240170808Sdelphij struct tmpfs_dirent *de = NULL; 1241170808Sdelphij 1242170808Sdelphij *ncookies = cnt; 1243170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1244170808Sdelphij 1245170808Sdelphij for (i = 0; i < cnt; i++) { 1246170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1247170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1248170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1249170808Sdelphij } else { 1250170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1251170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1252170808Sdelphij } else if (de != NULL) { 1253170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1254170808Sdelphij } else { 1255170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1256170808Sdelphij off); 1257170808Sdelphij MPASS(de != NULL); 1258170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1259170808Sdelphij } 1260171802Sdelphij if (de == NULL) 1261170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1262171802Sdelphij else 1263171802Sdelphij off = tmpfs_dircookie(de); 1264170808Sdelphij } 1265170808Sdelphij 1266170808Sdelphij (*cookies)[i] = off; 1267170808Sdelphij } 1268170808Sdelphij MPASS(uio->uio_offset == off); 1269170808Sdelphij } 1270170808Sdelphij 1271170808Sdelphij return error; 1272170808Sdelphij} 1273170808Sdelphij 1274170808Sdelphij/* --------------------------------------------------------------------- */ 1275170808Sdelphij 1276171069Sdelphijstatic int 1277170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1278170808Sdelphij{ 1279170808Sdelphij struct vnode *vp = v->a_vp; 1280170808Sdelphij struct uio *uio = v->a_uio; 1281170808Sdelphij 1282170808Sdelphij int error; 1283170808Sdelphij struct tmpfs_node *node; 1284170808Sdelphij 1285170808Sdelphij MPASS(uio->uio_offset == 0); 1286170808Sdelphij MPASS(vp->v_type == VLNK); 1287170808Sdelphij 1288170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1289170808Sdelphij 1290170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1291170808Sdelphij uio); 1292170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1293170808Sdelphij 1294170808Sdelphij return error; 1295170808Sdelphij} 1296170808Sdelphij 1297170808Sdelphij/* --------------------------------------------------------------------- */ 1298170808Sdelphij 1299171069Sdelphijstatic int 1300170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1301170808Sdelphij{ 1302170808Sdelphij struct vnode *vp = v->a_vp; 1303170808Sdelphij struct thread *l = v->a_td; 1304170808Sdelphij 1305170808Sdelphij struct tmpfs_node *node; 1306170808Sdelphij 1307176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1308170808Sdelphij 1309170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1310170808Sdelphij 1311170808Sdelphij if (node->tn_links == 0) 1312170808Sdelphij vrecycle(vp, l); 1313170808Sdelphij 1314170808Sdelphij return 0; 1315170808Sdelphij} 1316170808Sdelphij 1317170808Sdelphij/* --------------------------------------------------------------------- */ 1318170808Sdelphij 1319170808Sdelphijint 1320170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1321170808Sdelphij{ 1322170808Sdelphij struct vnode *vp = v->a_vp; 1323170808Sdelphij 1324170808Sdelphij struct tmpfs_mount *tmp; 1325170808Sdelphij struct tmpfs_node *node; 1326170808Sdelphij 1327170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1328170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1329171070Sdelphij 1330170808Sdelphij vnode_destroy_vobject(vp); 1331170808Sdelphij cache_purge(vp); 1332170808Sdelphij tmpfs_free_vp(vp); 1333170808Sdelphij 1334170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1335170808Sdelphij * we must free its associated data structures (now that the vnode 1336170808Sdelphij * is being reclaimed). */ 1337170808Sdelphij if (node->tn_links == 0) 1338170808Sdelphij tmpfs_free_node(tmp, node); 1339170808Sdelphij 1340170808Sdelphij MPASS(vp->v_data == NULL); 1341170808Sdelphij return 0; 1342170808Sdelphij} 1343170808Sdelphij 1344170808Sdelphij/* --------------------------------------------------------------------- */ 1345170808Sdelphij 1346171069Sdelphijstatic int 1347170808Sdelphijtmpfs_print(struct vop_print_args *v) 1348170808Sdelphij{ 1349170808Sdelphij struct vnode *vp = v->a_vp; 1350170808Sdelphij 1351170808Sdelphij struct tmpfs_node *node; 1352170808Sdelphij 1353170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1354170808Sdelphij 1355170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1356170808Sdelphij node, node->tn_flags, node->tn_links); 1357170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1358170808Sdelphij ", status 0x%x\n", 1359170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1360170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1361170808Sdelphij 1362170808Sdelphij if (vp->v_type == VFIFO) 1363170808Sdelphij fifo_printinfo(vp); 1364170808Sdelphij 1365170808Sdelphij printf("\n"); 1366170808Sdelphij 1367170808Sdelphij return 0; 1368170808Sdelphij} 1369170808Sdelphij 1370170808Sdelphij/* --------------------------------------------------------------------- */ 1371170808Sdelphij 1372171069Sdelphijstatic int 1373170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1374170808Sdelphij{ 1375170808Sdelphij int name = v->a_name; 1376170808Sdelphij register_t *retval = v->a_retval; 1377170808Sdelphij 1378170808Sdelphij int error; 1379170808Sdelphij 1380170808Sdelphij error = 0; 1381170808Sdelphij 1382170808Sdelphij switch (name) { 1383170808Sdelphij case _PC_LINK_MAX: 1384170808Sdelphij *retval = LINK_MAX; 1385170808Sdelphij break; 1386170808Sdelphij 1387170808Sdelphij case _PC_NAME_MAX: 1388170808Sdelphij *retval = NAME_MAX; 1389170808Sdelphij break; 1390170808Sdelphij 1391170808Sdelphij case _PC_PATH_MAX: 1392170808Sdelphij *retval = PATH_MAX; 1393170808Sdelphij break; 1394170808Sdelphij 1395170808Sdelphij case _PC_PIPE_BUF: 1396170808Sdelphij *retval = PIPE_BUF; 1397170808Sdelphij break; 1398170808Sdelphij 1399170808Sdelphij case _PC_CHOWN_RESTRICTED: 1400170808Sdelphij *retval = 1; 1401170808Sdelphij break; 1402170808Sdelphij 1403170808Sdelphij case _PC_NO_TRUNC: 1404170808Sdelphij *retval = 1; 1405170808Sdelphij break; 1406170808Sdelphij 1407170808Sdelphij case _PC_SYNC_IO: 1408170808Sdelphij *retval = 1; 1409170808Sdelphij break; 1410170808Sdelphij 1411170808Sdelphij case _PC_FILESIZEBITS: 1412170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1413170808Sdelphij break; 1414170808Sdelphij 1415170808Sdelphij default: 1416170808Sdelphij error = EINVAL; 1417170808Sdelphij } 1418170808Sdelphij 1419170808Sdelphij return error; 1420170808Sdelphij} 1421170808Sdelphij 1422171069Sdelphijstatic int 1423170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1424170808Sdelphij{ 1425170808Sdelphij struct tmpfs_fid *tfhp; 1426170808Sdelphij struct tmpfs_node *node; 1427170808Sdelphij 1428170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1429170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1430170808Sdelphij 1431170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1432170808Sdelphij tfhp->tf_id = node->tn_id; 1433170808Sdelphij tfhp->tf_gen = node->tn_gen; 1434171070Sdelphij 1435170808Sdelphij return (0); 1436170808Sdelphij} 1437171069Sdelphij 1438171069Sdelphij/* --------------------------------------------------------------------- */ 1439171069Sdelphij 1440171069Sdelphij/* 1441171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1442171069Sdelphij */ 1443171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1444171069Sdelphij .vop_default = &default_vnodeops, 1445171069Sdelphij .vop_lookup = vfs_cache_lookup, 1446171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1447171069Sdelphij .vop_create = tmpfs_create, 1448171069Sdelphij .vop_mknod = tmpfs_mknod, 1449171069Sdelphij .vop_open = tmpfs_open, 1450171069Sdelphij .vop_close = tmpfs_close, 1451171069Sdelphij .vop_access = tmpfs_access, 1452171069Sdelphij .vop_getattr = tmpfs_getattr, 1453171069Sdelphij .vop_setattr = tmpfs_setattr, 1454171069Sdelphij .vop_read = tmpfs_read, 1455171069Sdelphij .vop_write = tmpfs_write, 1456171069Sdelphij .vop_fsync = tmpfs_fsync, 1457171069Sdelphij .vop_remove = tmpfs_remove, 1458171069Sdelphij .vop_link = tmpfs_link, 1459171069Sdelphij .vop_rename = tmpfs_rename, 1460171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1461171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1462171069Sdelphij .vop_symlink = tmpfs_symlink, 1463171069Sdelphij .vop_readdir = tmpfs_readdir, 1464171069Sdelphij .vop_readlink = tmpfs_readlink, 1465171069Sdelphij .vop_inactive = tmpfs_inactive, 1466171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1467171069Sdelphij .vop_print = tmpfs_print, 1468171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1469171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1470171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1471171069Sdelphij}; 1472171069Sdelphij 1473