tmpfs_vnops.c revision 182371
1171802Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2170808Sdelphij 3170808Sdelphij/* 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 * 3. All advertising materials mentioning features or use of this software 20170808Sdelphij * must display the following acknowledgement: 21170808Sdelphij * This product includes software developed by the NetBSD 22170808Sdelphij * Foundation, Inc. and its contributors. 23170808Sdelphij * 4. Neither the name of The NetBSD Foundation nor the names of its 24170808Sdelphij * contributors may be used to endorse or promote products derived 25170808Sdelphij * from this software without specific prior written permission. 26170808Sdelphij * 27170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 38170808Sdelphij */ 39170808Sdelphij 40170808Sdelphij/* 41170808Sdelphij * tmpfs vnode interface. 42170808Sdelphij */ 43170808Sdelphij#include <sys/cdefs.h> 44170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 182371 2008-08-28 15:23:18Z attilio $"); 45170808Sdelphij 46170808Sdelphij#include <sys/param.h> 47170808Sdelphij#include <sys/fcntl.h> 48170808Sdelphij#include <sys/lockf.h> 49170808Sdelphij#include <sys/namei.h> 50170808Sdelphij#include <sys/priv.h> 51170808Sdelphij#include <sys/proc.h> 52170808Sdelphij#include <sys/resourcevar.h> 53170808Sdelphij#include <sys/stat.h> 54170808Sdelphij#include <sys/systm.h> 55170808Sdelphij#include <sys/unistd.h> 56170808Sdelphij#include <sys/vnode.h> 57170808Sdelphij 58170808Sdelphij#include <vm/vm.h> 59170808Sdelphij#include <vm/vm_object.h> 60170808Sdelphij#include <vm/vm_page.h> 61170808Sdelphij#include <vm/vm_pager.h> 62170808Sdelphij#include <sys/sched.h> 63170808Sdelphij#include <sys/sf_buf.h> 64170808Sdelphij#include <machine/_inttypes.h> 65170808Sdelphij 66170808Sdelphij#include <fs/fifofs/fifo.h> 67170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 68170808Sdelphij#include <fs/tmpfs/tmpfs.h> 69170808Sdelphij 70170808Sdelphij/* --------------------------------------------------------------------- */ 71170808Sdelphij 72171069Sdelphijstatic int 73170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 74170808Sdelphij{ 75170808Sdelphij struct vnode *dvp = v->a_dvp; 76170808Sdelphij struct vnode **vpp = v->a_vpp; 77170808Sdelphij struct componentname *cnp = v->a_cnp; 78170808Sdelphij struct thread *td = cnp->cn_thread; 79170808Sdelphij 80170808Sdelphij int error; 81170808Sdelphij struct tmpfs_dirent *de; 82170808Sdelphij struct tmpfs_node *dnode; 83170808Sdelphij 84170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 85170808Sdelphij *vpp = NULLVP; 86170808Sdelphij 87170808Sdelphij /* Check accessibility of requested node as a first step. */ 88170808Sdelphij error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 89170808Sdelphij if (error != 0) 90170808Sdelphij goto out; 91170808Sdelphij 92170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 93170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 94170808Sdelphij dnode->tn_dir.tn_parent == dnode, 95170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 96170808Sdelphij 97170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 98171799Sdelphij int ltype = 0; 99171799Sdelphij 100176559Sattilio ltype = VOP_ISLOCKED(dvp); 101171802Sdelphij vhold(dvp); 102175294Sattilio VOP_UNLOCK(dvp, 0); 103170808Sdelphij /* Allocate a new vnode on the matching entry. */ 104171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 105171799Sdelphij cnp->cn_lkflags, vpp, td); 106170808Sdelphij 107175202Sattilio vn_lock(dvp, ltype | LK_RETRY); 108171802Sdelphij vdrop(dvp); 109170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 110170808Sdelphij VREF(dvp); 111170808Sdelphij *vpp = dvp; 112170808Sdelphij error = 0; 113170808Sdelphij } else { 114170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 115170808Sdelphij if (de == NULL) { 116170808Sdelphij /* The entry was not found in the directory. 117170808Sdelphij * This is OK if we are creating or renaming an 118170808Sdelphij * entry and are working on the last component of 119170808Sdelphij * the path name. */ 120170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 121170808Sdelphij (cnp->cn_nameiop == CREATE || \ 122170808Sdelphij cnp->cn_nameiop == RENAME)) { 123170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 124170808Sdelphij cnp->cn_thread); 125170808Sdelphij if (error != 0) 126170808Sdelphij goto out; 127170808Sdelphij 128170808Sdelphij /* Keep the component name in the buffer for 129170808Sdelphij * future uses. */ 130170808Sdelphij cnp->cn_flags |= SAVENAME; 131170808Sdelphij 132170808Sdelphij error = EJUSTRETURN; 133170808Sdelphij } else 134170808Sdelphij error = ENOENT; 135170808Sdelphij } else { 136170808Sdelphij struct tmpfs_node *tnode; 137170808Sdelphij 138170808Sdelphij /* The entry was found, so get its associated 139170808Sdelphij * tmpfs_node. */ 140170808Sdelphij tnode = de->td_node; 141170808Sdelphij 142170808Sdelphij /* If we are not at the last path component and 143170808Sdelphij * found a non-directory or non-link entry (which 144170808Sdelphij * may itself be pointing to a directory), raise 145170808Sdelphij * an error. */ 146170808Sdelphij if ((tnode->tn_type != VDIR && 147170808Sdelphij tnode->tn_type != VLNK) && 148170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 149170808Sdelphij error = ENOTDIR; 150170808Sdelphij goto out; 151170808Sdelphij } 152170808Sdelphij 153170808Sdelphij /* If we are deleting or renaming the entry, keep 154170808Sdelphij * track of its tmpfs_dirent so that it can be 155170808Sdelphij * easily deleted later. */ 156170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 157170808Sdelphij (cnp->cn_nameiop == DELETE || 158170808Sdelphij cnp->cn_nameiop == RENAME)) { 159170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 160170808Sdelphij cnp->cn_thread); 161170808Sdelphij if (error != 0) 162170808Sdelphij goto out; 163171070Sdelphij 164170808Sdelphij /* Allocate a new vnode on the matching entry. */ 165171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 166171799Sdelphij cnp->cn_lkflags, vpp, td); 167170808Sdelphij if (error != 0) 168170808Sdelphij goto out; 169170808Sdelphij 170170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 171170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 172170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 173170808Sdelphij error = EPERM; 174170808Sdelphij vput(*vpp); 175170808Sdelphij *vpp = NULL; 176170808Sdelphij goto out; 177171070Sdelphij } 178170808Sdelphij cnp->cn_flags |= SAVENAME; 179171799Sdelphij } else { 180171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 181171799Sdelphij cnp->cn_lkflags, vpp, td); 182170808Sdelphij } 183170808Sdelphij } 184170808Sdelphij } 185170808Sdelphij 186170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 187170808Sdelphij * request was for creation, as it does not improve timings on 188170808Sdelphij * emprical tests. */ 189170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 190170808Sdelphij cache_enter(dvp, *vpp, cnp); 191170808Sdelphij 192170808Sdelphijout: 193170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 194170808Sdelphij * locked. */ 195176559Sattilio MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 196170808Sdelphij 197170808Sdelphij return error; 198170808Sdelphij} 199170808Sdelphij 200170808Sdelphij/* --------------------------------------------------------------------- */ 201170808Sdelphij 202171069Sdelphijstatic int 203170808Sdelphijtmpfs_create(struct vop_create_args *v) 204170808Sdelphij{ 205170808Sdelphij struct vnode *dvp = v->a_dvp; 206170808Sdelphij struct vnode **vpp = v->a_vpp; 207170808Sdelphij struct componentname *cnp = v->a_cnp; 208170808Sdelphij struct vattr *vap = v->a_vap; 209170808Sdelphij 210170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 211170808Sdelphij 212170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 213170808Sdelphij} 214170808Sdelphij/* --------------------------------------------------------------------- */ 215170808Sdelphij 216171069Sdelphijstatic int 217170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 218170808Sdelphij{ 219170808Sdelphij struct vnode *dvp = v->a_dvp; 220170808Sdelphij struct vnode **vpp = v->a_vpp; 221170808Sdelphij struct componentname *cnp = v->a_cnp; 222170808Sdelphij struct vattr *vap = v->a_vap; 223170808Sdelphij 224170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 225170808Sdelphij vap->va_type != VFIFO) 226170808Sdelphij return EINVAL; 227170808Sdelphij 228170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 229170808Sdelphij} 230170808Sdelphij 231170808Sdelphij/* --------------------------------------------------------------------- */ 232170808Sdelphij 233171069Sdelphijstatic int 234170808Sdelphijtmpfs_open(struct vop_open_args *v) 235170808Sdelphij{ 236170808Sdelphij struct vnode *vp = v->a_vp; 237170808Sdelphij int mode = v->a_mode; 238170808Sdelphij 239170808Sdelphij int error; 240170808Sdelphij struct tmpfs_node *node; 241170808Sdelphij 242176559Sattilio MPASS(VOP_ISLOCKED(vp)); 243170808Sdelphij 244170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 245171070Sdelphij 246170808Sdelphij /* The file is still active but all its names have been removed 247170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 248170808Sdelphij * it is about to die. */ 249170808Sdelphij if (node->tn_links < 1) 250170808Sdelphij return (ENOENT); 251170808Sdelphij 252170808Sdelphij /* If the file is marked append-only, deny write requests. */ 253170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 254170808Sdelphij error = EPERM; 255170808Sdelphij else { 256170808Sdelphij error = 0; 257171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 258170808Sdelphij } 259170808Sdelphij 260176559Sattilio MPASS(VOP_ISLOCKED(vp)); 261170808Sdelphij return error; 262170808Sdelphij} 263170808Sdelphij 264170808Sdelphij/* --------------------------------------------------------------------- */ 265170808Sdelphij 266171069Sdelphijstatic int 267170808Sdelphijtmpfs_close(struct vop_close_args *v) 268170808Sdelphij{ 269170808Sdelphij struct vnode *vp = v->a_vp; 270170808Sdelphij 271170808Sdelphij struct tmpfs_node *node; 272170808Sdelphij 273176559Sattilio MPASS(VOP_ISLOCKED(vp)); 274170808Sdelphij 275170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 276170808Sdelphij 277170808Sdelphij if (node->tn_links > 0) { 278170808Sdelphij /* Update node times. No need to do it if the node has 279170808Sdelphij * been deleted, because it will vanish after we return. */ 280170808Sdelphij tmpfs_update(vp); 281170808Sdelphij } 282170808Sdelphij 283170808Sdelphij return 0; 284170808Sdelphij} 285170808Sdelphij 286170808Sdelphij/* --------------------------------------------------------------------- */ 287170808Sdelphij 288170808Sdelphijint 289170808Sdelphijtmpfs_access(struct vop_access_args *v) 290170808Sdelphij{ 291170808Sdelphij struct vnode *vp = v->a_vp; 292170808Sdelphij int mode = v->a_mode; 293170808Sdelphij struct ucred *cred = v->a_cred; 294170808Sdelphij 295170808Sdelphij int error; 296170808Sdelphij struct tmpfs_node *node; 297170808Sdelphij 298176559Sattilio MPASS(VOP_ISLOCKED(vp)); 299170808Sdelphij 300170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 301170808Sdelphij 302170808Sdelphij switch (vp->v_type) { 303170808Sdelphij case VDIR: 304170808Sdelphij /* FALLTHROUGH */ 305170808Sdelphij case VLNK: 306170808Sdelphij /* FALLTHROUGH */ 307170808Sdelphij case VREG: 308170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 309170808Sdelphij error = EROFS; 310170808Sdelphij goto out; 311170808Sdelphij } 312170808Sdelphij break; 313170808Sdelphij 314170808Sdelphij case VBLK: 315170808Sdelphij /* FALLTHROUGH */ 316170808Sdelphij case VCHR: 317170808Sdelphij /* FALLTHROUGH */ 318170808Sdelphij case VSOCK: 319170808Sdelphij /* FALLTHROUGH */ 320170808Sdelphij case VFIFO: 321170808Sdelphij break; 322170808Sdelphij 323170808Sdelphij default: 324170808Sdelphij error = EINVAL; 325170808Sdelphij goto out; 326170808Sdelphij } 327170808Sdelphij 328170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 329170808Sdelphij error = EPERM; 330170808Sdelphij goto out; 331170808Sdelphij } 332170808Sdelphij 333170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 334170808Sdelphij node->tn_gid, mode, cred, NULL); 335170808Sdelphij 336170808Sdelphijout: 337176559Sattilio MPASS(VOP_ISLOCKED(vp)); 338170808Sdelphij 339170808Sdelphij return error; 340170808Sdelphij} 341170808Sdelphij 342170808Sdelphij/* --------------------------------------------------------------------- */ 343170808Sdelphij 344170808Sdelphijint 345170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 346170808Sdelphij{ 347170808Sdelphij struct vnode *vp = v->a_vp; 348170808Sdelphij struct vattr *vap = v->a_vap; 349170808Sdelphij 350170808Sdelphij struct tmpfs_node *node; 351170808Sdelphij 352170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 353170808Sdelphij 354170808Sdelphij VATTR_NULL(vap); 355170808Sdelphij 356170808Sdelphij tmpfs_update(vp); 357170808Sdelphij 358170808Sdelphij vap->va_type = vp->v_type; 359170808Sdelphij vap->va_mode = node->tn_mode; 360170808Sdelphij vap->va_nlink = node->tn_links; 361170808Sdelphij vap->va_uid = node->tn_uid; 362170808Sdelphij vap->va_gid = node->tn_gid; 363170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 364170808Sdelphij vap->va_fileid = node->tn_id; 365170808Sdelphij vap->va_size = node->tn_size; 366170808Sdelphij vap->va_blocksize = PAGE_SIZE; 367170808Sdelphij vap->va_atime = node->tn_atime; 368170808Sdelphij vap->va_mtime = node->tn_mtime; 369170808Sdelphij vap->va_ctime = node->tn_ctime; 370170808Sdelphij vap->va_birthtime = node->tn_birthtime; 371170808Sdelphij vap->va_gen = node->tn_gen; 372170808Sdelphij vap->va_flags = node->tn_flags; 373170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 374170808Sdelphij node->tn_rdev : VNOVAL; 375170808Sdelphij vap->va_bytes = round_page(node->tn_size); 376170808Sdelphij vap->va_filerev = VNOVAL; 377170808Sdelphij vap->va_vaflags = 0; 378170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 379170808Sdelphij 380170808Sdelphij return 0; 381170808Sdelphij} 382170808Sdelphij 383170808Sdelphij/* --------------------------------------------------------------------- */ 384170808Sdelphij 385170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 386170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 387170808Sdelphijint 388170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 389170808Sdelphij{ 390170808Sdelphij struct vnode *vp = v->a_vp; 391170808Sdelphij struct vattr *vap = v->a_vap; 392170808Sdelphij struct ucred *cred = v->a_cred; 393182371Sattilio struct thread *td = curthread; 394170808Sdelphij 395170808Sdelphij int error; 396170808Sdelphij 397176559Sattilio MPASS(VOP_ISLOCKED(vp)); 398170808Sdelphij 399170808Sdelphij error = 0; 400170808Sdelphij 401170808Sdelphij /* Abort if any unsettable attribute is given. */ 402170808Sdelphij if (vap->va_type != VNON || 403170808Sdelphij vap->va_nlink != VNOVAL || 404170808Sdelphij vap->va_fsid != VNOVAL || 405170808Sdelphij vap->va_fileid != VNOVAL || 406170808Sdelphij vap->va_blocksize != VNOVAL || 407170808Sdelphij vap->va_gen != VNOVAL || 408170808Sdelphij vap->va_rdev != VNOVAL || 409170808Sdelphij vap->va_bytes != VNOVAL) 410170808Sdelphij error = EINVAL; 411170808Sdelphij 412170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 413182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 414170808Sdelphij 415170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 416182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 417170808Sdelphij 418170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 419182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 420170808Sdelphij 421170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 422182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 423170808Sdelphij 424170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 425170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 426170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 427170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 428170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 429170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 430171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 431182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 432170808Sdelphij 433170808Sdelphij /* Update the node times. We give preference to the error codes 434170808Sdelphij * generated by this function rather than the ones that may arise 435170808Sdelphij * from tmpfs_update. */ 436170808Sdelphij tmpfs_update(vp); 437170808Sdelphij 438176559Sattilio MPASS(VOP_ISLOCKED(vp)); 439170808Sdelphij 440170808Sdelphij return error; 441170808Sdelphij} 442170808Sdelphij 443170808Sdelphij/* --------------------------------------------------------------------- */ 444171489Sdelphij 445170808Sdelphijstatic int 446171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 447170808Sdelphij{ 448171489Sdelphij vm_pindex_t idx; 449171489Sdelphij vm_page_t m; 450171489Sdelphij struct sf_buf *sf; 451171489Sdelphij off_t offset, addr; 452171489Sdelphij size_t tlen; 453171489Sdelphij caddr_t va; 454171489Sdelphij int error; 455170808Sdelphij 456171489Sdelphij addr = uio->uio_offset; 457171489Sdelphij idx = OFF_TO_IDX(addr); 458171489Sdelphij offset = addr & PAGE_MASK; 459171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 460170808Sdelphij 461171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 462171489Sdelphij goto nocache; 463170808Sdelphij 464171489Sdelphij VM_OBJECT_LOCK(vobj); 465171489Sdelphijlookupvpg: 466171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 467171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 468171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 469171489Sdelphij goto lookupvpg; 470171489Sdelphij vm_page_busy(m); 471171489Sdelphij VM_OBJECT_UNLOCK(vobj); 472170808Sdelphij sched_pin(); 473170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 474171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 475171489Sdelphij error = uiomove(va + offset, tlen, uio); 476170808Sdelphij sf_buf_free(sf); 477170808Sdelphij sched_unpin(); 478171489Sdelphij VM_OBJECT_LOCK(vobj); 479171489Sdelphij vm_page_wakeup(m); 480171489Sdelphij VM_OBJECT_UNLOCK(vobj); 481171489Sdelphij return (error); 482171799Sdelphij } 483171489Sdelphij VM_OBJECT_UNLOCK(vobj); 484171489Sdelphijnocache: 485171489Sdelphij VM_OBJECT_LOCK(tobj); 486171489Sdelphij vm_object_pip_add(tobj, 1); 487171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 488171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 489171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 490171489Sdelphij int behind, ahead; 491171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 492171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 493171489Sdelphij if (error != 0) { 494171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 495171489Sdelphij goto out; 496171489Sdelphij } 497171489Sdelphij } else 498170808Sdelphij vm_page_zero_invalid(m, TRUE); 499170808Sdelphij } 500171489Sdelphij VM_OBJECT_UNLOCK(tobj); 501171489Sdelphij sched_pin(); 502171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 503171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 504171489Sdelphij error = uiomove(va + offset, tlen, uio); 505171489Sdelphij sf_buf_free(sf); 506171489Sdelphij sched_unpin(); 507171489Sdelphij VM_OBJECT_LOCK(tobj); 508171308Sdelphijout: 509171489Sdelphij vm_page_lock_queues(); 510171489Sdelphij vm_page_unwire(m, 0); 511171489Sdelphij vm_page_activate(m); 512171489Sdelphij vm_page_unlock_queues(); 513171489Sdelphij vm_page_wakeup(m); 514171489Sdelphij vm_object_pip_subtract(tobj, 1); 515171489Sdelphij VM_OBJECT_UNLOCK(tobj); 516171489Sdelphij 517171489Sdelphij return (error); 518170808Sdelphij} 519170808Sdelphij 520171069Sdelphijstatic int 521170808Sdelphijtmpfs_read(struct vop_read_args *v) 522170808Sdelphij{ 523170808Sdelphij struct vnode *vp = v->a_vp; 524170808Sdelphij struct uio *uio = v->a_uio; 525170808Sdelphij 526170808Sdelphij struct tmpfs_node *node; 527170808Sdelphij vm_object_t uobj; 528171489Sdelphij size_t len; 529171489Sdelphij int resid; 530170808Sdelphij 531174265Swkoszek int error = 0; 532170808Sdelphij 533170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 534170808Sdelphij 535170808Sdelphij if (vp->v_type != VREG) { 536170808Sdelphij error = EISDIR; 537170808Sdelphij goto out; 538170808Sdelphij } 539170808Sdelphij 540170808Sdelphij if (uio->uio_offset < 0) { 541170808Sdelphij error = EINVAL; 542170808Sdelphij goto out; 543170808Sdelphij } 544170808Sdelphij 545170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 546170808Sdelphij 547170808Sdelphij uobj = node->tn_reg.tn_aobj; 548171489Sdelphij while ((resid = uio->uio_resid) > 0) { 549171489Sdelphij error = 0; 550171489Sdelphij if (node->tn_size <= uio->uio_offset) 551171489Sdelphij break; 552171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 553171489Sdelphij if (len == 0) 554171489Sdelphij break; 555171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 556171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 557171489Sdelphij break; 558171489Sdelphij } 559170808Sdelphij 560170808Sdelphijout: 561170808Sdelphij 562170808Sdelphij return error; 563170808Sdelphij} 564170808Sdelphij 565170808Sdelphij/* --------------------------------------------------------------------- */ 566170808Sdelphij 567171069Sdelphijstatic int 568171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 569171489Sdelphij{ 570171489Sdelphij vm_pindex_t idx; 571171489Sdelphij vm_page_t vpg, tpg; 572171489Sdelphij struct sf_buf *sf; 573171489Sdelphij off_t offset, addr; 574171489Sdelphij size_t tlen; 575171489Sdelphij caddr_t va; 576171489Sdelphij int error; 577171489Sdelphij 578174265Swkoszek error = 0; 579174265Swkoszek 580171489Sdelphij addr = uio->uio_offset; 581171489Sdelphij idx = OFF_TO_IDX(addr); 582171489Sdelphij offset = addr & PAGE_MASK; 583171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 584171489Sdelphij 585171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 586171489Sdelphij vpg = NULL; 587171489Sdelphij goto nocache; 588171489Sdelphij } 589171489Sdelphij 590171489Sdelphij VM_OBJECT_LOCK(vobj); 591171489Sdelphijlookupvpg: 592171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 593171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 594171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 595171489Sdelphij goto lookupvpg; 596171489Sdelphij vm_page_busy(vpg); 597171489Sdelphij vm_page_lock_queues(); 598171489Sdelphij vm_page_undirty(vpg); 599171489Sdelphij vm_page_unlock_queues(); 600171489Sdelphij VM_OBJECT_UNLOCK(vobj); 601171489Sdelphij sched_pin(); 602171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 603171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 604171489Sdelphij error = uiomove(va + offset, tlen, uio); 605171489Sdelphij sf_buf_free(sf); 606171489Sdelphij sched_unpin(); 607171489Sdelphij } else { 608171489Sdelphij VM_OBJECT_UNLOCK(vobj); 609171489Sdelphij vpg = NULL; 610171489Sdelphij } 611171489Sdelphijnocache: 612171489Sdelphij VM_OBJECT_LOCK(tobj); 613171489Sdelphij vm_object_pip_add(tobj, 1); 614171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 615171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 616171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 617171489Sdelphij int behind, ahead; 618171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 619171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 620171489Sdelphij if (error != 0) { 621171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 622171489Sdelphij goto out; 623171489Sdelphij } 624171489Sdelphij } else 625171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 626171489Sdelphij } 627171489Sdelphij VM_OBJECT_UNLOCK(tobj); 628171489Sdelphij if (vpg == NULL) { 629171489Sdelphij sched_pin(); 630171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 631171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 632171489Sdelphij error = uiomove(va + offset, tlen, uio); 633171489Sdelphij sf_buf_free(sf); 634171489Sdelphij sched_unpin(); 635171489Sdelphij } else { 636171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 637171489Sdelphij pmap_copy_page(vpg, tpg); 638171489Sdelphij } 639171489Sdelphij VM_OBJECT_LOCK(tobj); 640171489Sdelphijout: 641171489Sdelphij if (vobj != NULL) 642171489Sdelphij VM_OBJECT_LOCK(vobj); 643171489Sdelphij vm_page_lock_queues(); 644171489Sdelphij if (error == 0) { 645171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 646171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 647171489Sdelphij vm_page_dirty(tpg); 648171489Sdelphij } 649171489Sdelphij vm_page_unwire(tpg, 0); 650171489Sdelphij vm_page_activate(tpg); 651171489Sdelphij vm_page_unlock_queues(); 652171489Sdelphij vm_page_wakeup(tpg); 653171489Sdelphij if (vpg != NULL) 654171489Sdelphij vm_page_wakeup(vpg); 655171489Sdelphij if (vobj != NULL) 656171489Sdelphij VM_OBJECT_UNLOCK(vobj); 657171489Sdelphij vm_object_pip_subtract(tobj, 1); 658171489Sdelphij VM_OBJECT_UNLOCK(tobj); 659171489Sdelphij 660171489Sdelphij return (error); 661171489Sdelphij} 662171489Sdelphij 663171489Sdelphijstatic int 664170808Sdelphijtmpfs_write(struct vop_write_args *v) 665170808Sdelphij{ 666170808Sdelphij struct vnode *vp = v->a_vp; 667170808Sdelphij struct uio *uio = v->a_uio; 668170808Sdelphij int ioflag = v->a_ioflag; 669170808Sdelphij struct thread *td = uio->uio_td; 670170808Sdelphij 671170808Sdelphij boolean_t extended; 672171489Sdelphij int error = 0; 673170808Sdelphij off_t oldsize; 674170808Sdelphij struct tmpfs_node *node; 675170808Sdelphij vm_object_t uobj; 676171489Sdelphij size_t len; 677171489Sdelphij int resid; 678170808Sdelphij 679170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 680170808Sdelphij oldsize = node->tn_size; 681170808Sdelphij 682170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 683170808Sdelphij error = EINVAL; 684170808Sdelphij goto out; 685170808Sdelphij } 686170808Sdelphij 687170808Sdelphij if (uio->uio_resid == 0) { 688170808Sdelphij error = 0; 689170808Sdelphij goto out; 690170808Sdelphij } 691170808Sdelphij 692170808Sdelphij if (ioflag & IO_APPEND) 693170808Sdelphij uio->uio_offset = node->tn_size; 694171070Sdelphij 695171070Sdelphij if (uio->uio_offset + uio->uio_resid > 696170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 697170808Sdelphij return (EFBIG); 698170808Sdelphij 699170808Sdelphij if (vp->v_type == VREG && td != NULL) { 700170808Sdelphij PROC_LOCK(td->td_proc); 701170808Sdelphij if (uio->uio_offset + uio->uio_resid > 702170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 703170808Sdelphij psignal(td->td_proc, SIGXFSZ); 704170808Sdelphij PROC_UNLOCK(td->td_proc); 705170808Sdelphij return (EFBIG); 706170808Sdelphij } 707170808Sdelphij PROC_UNLOCK(td->td_proc); 708170808Sdelphij } 709170808Sdelphij 710170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 711170808Sdelphij if (extended) { 712170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 713170808Sdelphij if (error != 0) 714170808Sdelphij goto out; 715170808Sdelphij } 716170808Sdelphij 717170808Sdelphij uobj = node->tn_reg.tn_aobj; 718171489Sdelphij while ((resid = uio->uio_resid) > 0) { 719171489Sdelphij if (node->tn_size <= uio->uio_offset) 720171489Sdelphij break; 721171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 722171489Sdelphij if (len == 0) 723171489Sdelphij break; 724171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 725171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 726171489Sdelphij break; 727171489Sdelphij } 728170808Sdelphij 729170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 730170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 731170808Sdelphij 732170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 733170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 734170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 735170808Sdelphij } 736170808Sdelphij 737170808Sdelphij if (error != 0) 738170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 739170808Sdelphij 740170808Sdelphijout: 741170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 742170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 743170808Sdelphij 744170808Sdelphij return error; 745170808Sdelphij} 746170808Sdelphij 747170808Sdelphij/* --------------------------------------------------------------------- */ 748170808Sdelphij 749171069Sdelphijstatic int 750170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 751170808Sdelphij{ 752170808Sdelphij struct vnode *vp = v->a_vp; 753170808Sdelphij 754176559Sattilio MPASS(VOP_ISLOCKED(vp)); 755170808Sdelphij 756170808Sdelphij tmpfs_update(vp); 757170808Sdelphij 758170808Sdelphij return 0; 759170808Sdelphij} 760170808Sdelphij 761170808Sdelphij/* --------------------------------------------------------------------- */ 762170808Sdelphij 763171069Sdelphijstatic int 764170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 765170808Sdelphij{ 766170808Sdelphij struct vnode *dvp = v->a_dvp; 767170808Sdelphij struct vnode *vp = v->a_vp; 768170808Sdelphij 769170808Sdelphij int error; 770170808Sdelphij struct tmpfs_dirent *de; 771170808Sdelphij struct tmpfs_mount *tmp; 772170808Sdelphij struct tmpfs_node *dnode; 773170808Sdelphij struct tmpfs_node *node; 774170808Sdelphij 775176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 776176559Sattilio MPASS(VOP_ISLOCKED(vp)); 777170808Sdelphij 778170808Sdelphij if (vp->v_type == VDIR) { 779170808Sdelphij error = EISDIR; 780170808Sdelphij goto out; 781170808Sdelphij } 782170808Sdelphij 783170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 784170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 785170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 786173725Sdelphij de = tmpfs_dir_search(dnode, node); 787170808Sdelphij MPASS(de != NULL); 788170808Sdelphij 789170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 790170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 791170808Sdelphij (dnode->tn_flags & APPEND)) { 792170808Sdelphij error = EPERM; 793170808Sdelphij goto out; 794170808Sdelphij } 795170808Sdelphij 796170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 797170808Sdelphij * have to change the number of hard links of the directory. */ 798170808Sdelphij tmpfs_dir_detach(dvp, de); 799170808Sdelphij 800170808Sdelphij /* Free the directory entry we just deleted. Note that the node 801170808Sdelphij * referred by it will not be removed until the vnode is really 802170808Sdelphij * reclaimed. */ 803170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 804170808Sdelphij 805170808Sdelphij if (node->tn_links > 0) 806170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 807170808Sdelphij TMPFS_NODE_MODIFIED; 808170808Sdelphij error = 0; 809170808Sdelphij 810170808Sdelphijout: 811170808Sdelphij 812170808Sdelphij return error; 813170808Sdelphij} 814170808Sdelphij 815170808Sdelphij/* --------------------------------------------------------------------- */ 816170808Sdelphij 817171069Sdelphijstatic int 818170808Sdelphijtmpfs_link(struct vop_link_args *v) 819170808Sdelphij{ 820170808Sdelphij struct vnode *dvp = v->a_tdvp; 821170808Sdelphij struct vnode *vp = v->a_vp; 822170808Sdelphij struct componentname *cnp = v->a_cnp; 823170808Sdelphij 824170808Sdelphij int error; 825170808Sdelphij struct tmpfs_dirent *de; 826170808Sdelphij struct tmpfs_node *node; 827170808Sdelphij 828176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 829170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 830170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 831170808Sdelphij 832170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 833170808Sdelphij 834170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 835170808Sdelphij 836170808Sdelphij /* Hard links of directories are forbidden. */ 837170808Sdelphij if (vp->v_type == VDIR) { 838170808Sdelphij error = EPERM; 839170808Sdelphij goto out; 840170808Sdelphij } 841170808Sdelphij 842170808Sdelphij /* Cannot create cross-device links. */ 843170808Sdelphij if (dvp->v_mount != vp->v_mount) { 844170808Sdelphij error = EXDEV; 845170808Sdelphij goto out; 846170808Sdelphij } 847170808Sdelphij 848170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 849170808Sdelphij * by the system. */ 850170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 851170808Sdelphij if (node->tn_links == LINK_MAX) { 852170808Sdelphij error = EMLINK; 853170808Sdelphij goto out; 854170808Sdelphij } 855170808Sdelphij 856170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 857170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 858170808Sdelphij error = EPERM; 859170808Sdelphij goto out; 860170808Sdelphij } 861170808Sdelphij 862170808Sdelphij /* Allocate a new directory entry to represent the node. */ 863170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 864170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 865170808Sdelphij if (error != 0) 866170808Sdelphij goto out; 867170808Sdelphij 868170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 869170808Sdelphij tmpfs_dir_attach(dvp, de); 870170808Sdelphij 871170808Sdelphij /* vp link count has changed, so update node times. */ 872170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 873170808Sdelphij tmpfs_update(vp); 874170808Sdelphij 875170808Sdelphij error = 0; 876171070Sdelphij 877170808Sdelphijout: 878170808Sdelphij return error; 879170808Sdelphij} 880170808Sdelphij 881170808Sdelphij/* --------------------------------------------------------------------- */ 882170808Sdelphij 883171069Sdelphijstatic int 884170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 885170808Sdelphij{ 886170808Sdelphij struct vnode *fdvp = v->a_fdvp; 887170808Sdelphij struct vnode *fvp = v->a_fvp; 888170808Sdelphij struct componentname *fcnp = v->a_fcnp; 889170808Sdelphij struct vnode *tdvp = v->a_tdvp; 890170808Sdelphij struct vnode *tvp = v->a_tvp; 891170808Sdelphij struct componentname *tcnp = v->a_tcnp; 892170808Sdelphij 893170808Sdelphij char *newname; 894170808Sdelphij int error; 895170808Sdelphij struct tmpfs_dirent *de; 896170808Sdelphij struct tmpfs_node *fdnode; 897170808Sdelphij struct tmpfs_node *fnode; 898171799Sdelphij struct tmpfs_node *tnode; 899170808Sdelphij struct tmpfs_node *tdnode; 900170808Sdelphij 901176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 902176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 903170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 904170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 905170808Sdelphij 906171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 907170808Sdelphij 908170808Sdelphij /* Disallow cross-device renames. 909170808Sdelphij * XXX Why isn't this done by the caller? */ 910170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 911170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 912170808Sdelphij error = EXDEV; 913170808Sdelphij goto out; 914170808Sdelphij } 915170808Sdelphij 916170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 917170808Sdelphij 918170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 919170808Sdelphij if (fvp == tvp) { 920170808Sdelphij error = 0; 921170808Sdelphij goto out; 922170808Sdelphij } 923170808Sdelphij 924173725Sdelphij /* If we need to move the directory between entries, lock the 925173725Sdelphij * source so that we can safely operate on it. */ 926173725Sdelphij if (tdvp != fdvp) { 927175202Sattilio error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 928173725Sdelphij if (error != 0) 929173725Sdelphij goto out; 930173725Sdelphij } 931173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 932173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 933173725Sdelphij de = tmpfs_dir_search(fdnode, fnode); 934173725Sdelphij 935170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 936170808Sdelphij if (de == NULL) { 937170808Sdelphij MPASS(fvp->v_type == VDIR); 938170808Sdelphij error = EINVAL; 939173725Sdelphij goto out_locked; 940170808Sdelphij } 941170808Sdelphij MPASS(de->td_node == fnode); 942170808Sdelphij 943171070Sdelphij /* If re-naming a directory to another preexisting directory 944170808Sdelphij * ensure that the target directory is empty so that its 945171070Sdelphij * removal causes no side effects. 946170808Sdelphij * Kern_rename gurantees the destination to be a directory 947170808Sdelphij * if the source is one. */ 948170808Sdelphij if (tvp != NULL) { 949171799Sdelphij MPASS(tnode != NULL); 950171070Sdelphij 951170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 952170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 953170808Sdelphij error = EPERM; 954173725Sdelphij goto out_locked; 955170808Sdelphij } 956170808Sdelphij 957171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 958171799Sdelphij if (tnode->tn_size > 0) { 959171799Sdelphij error = ENOTEMPTY; 960173725Sdelphij goto out_locked; 961171799Sdelphij } 962171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 963171799Sdelphij error = ENOTDIR; 964173725Sdelphij goto out_locked; 965171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 966171799Sdelphij error = EISDIR; 967173725Sdelphij goto out_locked; 968171799Sdelphij } else { 969171799Sdelphij MPASS(fnode->tn_type != VDIR && 970171799Sdelphij tnode->tn_type != VDIR); 971170808Sdelphij } 972170808Sdelphij } 973170808Sdelphij 974170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 975170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 976170808Sdelphij error = EPERM; 977170808Sdelphij goto out_locked; 978170808Sdelphij } 979170808Sdelphij 980170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 981170808Sdelphij * has to be changed. */ 982170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 983170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 984171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 985170808Sdelphij } else 986170808Sdelphij newname = NULL; 987170808Sdelphij 988170808Sdelphij /* If the node is being moved to another directory, we have to do 989170808Sdelphij * the move. */ 990170808Sdelphij if (fdnode != tdnode) { 991170808Sdelphij /* In case we are moving a directory, we have to adjust its 992170808Sdelphij * parent to point to the new parent. */ 993170808Sdelphij if (de->td_node->tn_type == VDIR) { 994170808Sdelphij struct tmpfs_node *n; 995170808Sdelphij 996170808Sdelphij /* Ensure the target directory is not a child of the 997170808Sdelphij * directory being moved. Otherwise, we'd end up 998170808Sdelphij * with stale nodes. */ 999170808Sdelphij n = tdnode; 1000170808Sdelphij while (n != n->tn_dir.tn_parent) { 1001170808Sdelphij if (n == fnode) { 1002170808Sdelphij error = EINVAL; 1003170808Sdelphij if (newname != NULL) 1004171087Sdelphij free(newname, M_TMPFSNAME); 1005170808Sdelphij goto out_locked; 1006170808Sdelphij } 1007170808Sdelphij n = n->tn_dir.tn_parent; 1008170808Sdelphij } 1009170808Sdelphij 1010170808Sdelphij /* Adjust the parent pointer. */ 1011170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1012170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1013170808Sdelphij 1014170808Sdelphij /* As a result of changing the target of the '..' 1015170808Sdelphij * entry, the link count of the source and target 1016170808Sdelphij * directories has to be adjusted. */ 1017170808Sdelphij fdnode->tn_links--; 1018170808Sdelphij tdnode->tn_links++; 1019170808Sdelphij } 1020170808Sdelphij 1021170808Sdelphij /* Do the move: just remove the entry from the source directory 1022170808Sdelphij * and insert it into the target one. */ 1023170808Sdelphij tmpfs_dir_detach(fdvp, de); 1024170808Sdelphij tmpfs_dir_attach(tdvp, de); 1025170808Sdelphij } 1026170808Sdelphij 1027170808Sdelphij /* If the name has changed, we need to make it effective by changing 1028170808Sdelphij * it in the directory entry. */ 1029170808Sdelphij if (newname != NULL) { 1030170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1031170808Sdelphij 1032171087Sdelphij free(de->td_name, M_TMPFSNAME); 1033170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1034170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1035170808Sdelphij de->td_name = newname; 1036170808Sdelphij 1037170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1038170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1039170808Sdelphij } 1040170808Sdelphij 1041170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1042170808Sdelphij * from the target directory. */ 1043170808Sdelphij if (tvp != NULL) { 1044170808Sdelphij /* Remove the old entry from the target directory. */ 1045173725Sdelphij de = tmpfs_dir_search(tdnode, tnode); 1046170808Sdelphij tmpfs_dir_detach(tdvp, de); 1047170808Sdelphij 1048170808Sdelphij /* Free the directory entry we just deleted. Note that the 1049170808Sdelphij * node referred by it will not be removed until the vnode is 1050170808Sdelphij * really reclaimed. */ 1051170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1052170808Sdelphij } 1053170808Sdelphij 1054170808Sdelphij error = 0; 1055170808Sdelphij 1056170808Sdelphijout_locked: 1057170808Sdelphij if (fdnode != tdnode) 1058175294Sattilio VOP_UNLOCK(fdvp, 0); 1059170808Sdelphij 1060170808Sdelphijout: 1061170808Sdelphij /* Release target nodes. */ 1062170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1063170808Sdelphij * other code takes care of this... */ 1064170808Sdelphij if (tdvp == tvp) 1065170808Sdelphij vrele(tdvp); 1066170808Sdelphij else 1067170808Sdelphij vput(tdvp); 1068170808Sdelphij if (tvp != NULL) 1069170808Sdelphij vput(tvp); 1070170808Sdelphij 1071170808Sdelphij /* Release source nodes. */ 1072170808Sdelphij vrele(fdvp); 1073170808Sdelphij vrele(fvp); 1074170808Sdelphij 1075170808Sdelphij return error; 1076170808Sdelphij} 1077170808Sdelphij 1078170808Sdelphij/* --------------------------------------------------------------------- */ 1079170808Sdelphij 1080171069Sdelphijstatic int 1081170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1082170808Sdelphij{ 1083170808Sdelphij struct vnode *dvp = v->a_dvp; 1084170808Sdelphij struct vnode **vpp = v->a_vpp; 1085170808Sdelphij struct componentname *cnp = v->a_cnp; 1086170808Sdelphij struct vattr *vap = v->a_vap; 1087170808Sdelphij 1088170808Sdelphij MPASS(vap->va_type == VDIR); 1089170808Sdelphij 1090170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1091170808Sdelphij} 1092170808Sdelphij 1093170808Sdelphij/* --------------------------------------------------------------------- */ 1094170808Sdelphij 1095171069Sdelphijstatic int 1096170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1097170808Sdelphij{ 1098170808Sdelphij struct vnode *dvp = v->a_dvp; 1099170808Sdelphij struct vnode *vp = v->a_vp; 1100170808Sdelphij 1101170808Sdelphij int error; 1102170808Sdelphij struct tmpfs_dirent *de; 1103170808Sdelphij struct tmpfs_mount *tmp; 1104170808Sdelphij struct tmpfs_node *dnode; 1105170808Sdelphij struct tmpfs_node *node; 1106170808Sdelphij 1107176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1108176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1109170808Sdelphij 1110170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1111170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1112170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1113170808Sdelphij 1114171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1115171070Sdelphij * removed. */ 1116171070Sdelphij if (node->tn_size > 0) { 1117171070Sdelphij error = ENOTEMPTY; 1118171070Sdelphij goto out; 1119171070Sdelphij } 1120170808Sdelphij 1121170808Sdelphij if ((dnode->tn_flags & APPEND) 1122170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1123170808Sdelphij error = EPERM; 1124170808Sdelphij goto out; 1125170808Sdelphij } 1126170808Sdelphij 1127171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1128171070Sdelphij * We checked for that above so this is safe now. */ 1129170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1130170808Sdelphij 1131170808Sdelphij /* Get the directory entry associated with node (vp). This was 1132170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1133173725Sdelphij de = tmpfs_dir_search(dnode, node); 1134170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1135170808Sdelphij v->a_cnp->cn_nameptr, 1136170808Sdelphij v->a_cnp->cn_namelen)); 1137170808Sdelphij 1138170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1139170808Sdelphij if (dnode->tn_flags & APPEND 1140170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1141170808Sdelphij error = EPERM; 1142170808Sdelphij goto out; 1143170808Sdelphij } 1144170808Sdelphij 1145170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1146170808Sdelphij tmpfs_dir_detach(dvp, de); 1147170808Sdelphij 1148170808Sdelphij node->tn_links--; 1149170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1150170808Sdelphij TMPFS_NODE_MODIFIED; 1151170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1152170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1153170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1154170808Sdelphij 1155171070Sdelphij cache_purge(dvp); 1156170808Sdelphij cache_purge(vp); 1157170808Sdelphij 1158170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1159170808Sdelphij * referred by it will not be removed until the vnode is really 1160170808Sdelphij * reclaimed. */ 1161170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1162170808Sdelphij 1163170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1164170808Sdelphij * interested parties and clean it from the cache). */ 1165170808Sdelphij 1166170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1167170808Sdelphij tmpfs_update(dvp); 1168170808Sdelphij 1169170808Sdelphij error = 0; 1170170808Sdelphij 1171170808Sdelphijout: 1172170808Sdelphij return error; 1173170808Sdelphij} 1174170808Sdelphij 1175170808Sdelphij/* --------------------------------------------------------------------- */ 1176170808Sdelphij 1177171069Sdelphijstatic int 1178170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1179170808Sdelphij{ 1180170808Sdelphij struct vnode *dvp = v->a_dvp; 1181170808Sdelphij struct vnode **vpp = v->a_vpp; 1182170808Sdelphij struct componentname *cnp = v->a_cnp; 1183170808Sdelphij struct vattr *vap = v->a_vap; 1184170808Sdelphij char *target = v->a_target; 1185170808Sdelphij 1186170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1187170808Sdelphij MPASS(vap->va_type == VLNK); 1188170808Sdelphij#else 1189170808Sdelphij vap->va_type = VLNK; 1190170808Sdelphij#endif 1191170808Sdelphij 1192170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1193170808Sdelphij} 1194170808Sdelphij 1195170808Sdelphij/* --------------------------------------------------------------------- */ 1196170808Sdelphij 1197171069Sdelphijstatic int 1198170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1199170808Sdelphij{ 1200170808Sdelphij struct vnode *vp = v->a_vp; 1201170808Sdelphij struct uio *uio = v->a_uio; 1202170808Sdelphij int *eofflag = v->a_eofflag; 1203170808Sdelphij u_long **cookies = v->a_cookies; 1204170808Sdelphij int *ncookies = v->a_ncookies; 1205170808Sdelphij 1206170808Sdelphij int error; 1207170808Sdelphij off_t startoff; 1208171802Sdelphij off_t cnt = 0; 1209170808Sdelphij struct tmpfs_node *node; 1210170808Sdelphij 1211170808Sdelphij /* This operation only makes sense on directory nodes. */ 1212171802Sdelphij if (vp->v_type != VDIR) 1213171802Sdelphij return ENOTDIR; 1214170808Sdelphij 1215170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1216170808Sdelphij 1217170808Sdelphij startoff = uio->uio_offset; 1218170808Sdelphij 1219171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1220170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1221171862Sdelphij if (error != 0) 1222171862Sdelphij goto outok; 1223171862Sdelphij cnt++; 1224171862Sdelphij } 1225171862Sdelphij 1226171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1227170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1228171862Sdelphij if (error != 0) 1229171862Sdelphij goto outok; 1230171862Sdelphij cnt++; 1231170808Sdelphij } 1232170808Sdelphij 1233171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1234171862Sdelphij 1235171862Sdelphijoutok: 1236171862Sdelphij MPASS(error >= -1); 1237171862Sdelphij 1238170808Sdelphij if (error == -1) 1239170808Sdelphij error = 0; 1240170808Sdelphij 1241170808Sdelphij if (eofflag != NULL) 1242170808Sdelphij *eofflag = 1243170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1244170808Sdelphij 1245170808Sdelphij /* Update NFS-related variables. */ 1246170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1247170808Sdelphij off_t i; 1248170808Sdelphij off_t off = startoff; 1249170808Sdelphij struct tmpfs_dirent *de = NULL; 1250170808Sdelphij 1251170808Sdelphij *ncookies = cnt; 1252170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1253170808Sdelphij 1254170808Sdelphij for (i = 0; i < cnt; i++) { 1255170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1256170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1257170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1258170808Sdelphij } else { 1259170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1260170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1261170808Sdelphij } else if (de != NULL) { 1262170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1263170808Sdelphij } else { 1264170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1265170808Sdelphij off); 1266170808Sdelphij MPASS(de != NULL); 1267170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1268170808Sdelphij } 1269171802Sdelphij if (de == NULL) 1270170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1271171802Sdelphij else 1272171802Sdelphij off = tmpfs_dircookie(de); 1273170808Sdelphij } 1274170808Sdelphij 1275170808Sdelphij (*cookies)[i] = off; 1276170808Sdelphij } 1277170808Sdelphij MPASS(uio->uio_offset == off); 1278170808Sdelphij } 1279170808Sdelphij 1280170808Sdelphij return error; 1281170808Sdelphij} 1282170808Sdelphij 1283170808Sdelphij/* --------------------------------------------------------------------- */ 1284170808Sdelphij 1285171069Sdelphijstatic int 1286170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1287170808Sdelphij{ 1288170808Sdelphij struct vnode *vp = v->a_vp; 1289170808Sdelphij struct uio *uio = v->a_uio; 1290170808Sdelphij 1291170808Sdelphij int error; 1292170808Sdelphij struct tmpfs_node *node; 1293170808Sdelphij 1294170808Sdelphij MPASS(uio->uio_offset == 0); 1295170808Sdelphij MPASS(vp->v_type == VLNK); 1296170808Sdelphij 1297170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1298170808Sdelphij 1299170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1300170808Sdelphij uio); 1301170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1302170808Sdelphij 1303170808Sdelphij return error; 1304170808Sdelphij} 1305170808Sdelphij 1306170808Sdelphij/* --------------------------------------------------------------------- */ 1307170808Sdelphij 1308171069Sdelphijstatic int 1309170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1310170808Sdelphij{ 1311170808Sdelphij struct vnode *vp = v->a_vp; 1312170808Sdelphij struct thread *l = v->a_td; 1313170808Sdelphij 1314170808Sdelphij struct tmpfs_node *node; 1315170808Sdelphij 1316176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1317170808Sdelphij 1318170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1319170808Sdelphij 1320170808Sdelphij if (node->tn_links == 0) 1321170808Sdelphij vrecycle(vp, l); 1322170808Sdelphij 1323170808Sdelphij return 0; 1324170808Sdelphij} 1325170808Sdelphij 1326170808Sdelphij/* --------------------------------------------------------------------- */ 1327170808Sdelphij 1328170808Sdelphijint 1329170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1330170808Sdelphij{ 1331170808Sdelphij struct vnode *vp = v->a_vp; 1332170808Sdelphij 1333170808Sdelphij struct tmpfs_mount *tmp; 1334170808Sdelphij struct tmpfs_node *node; 1335170808Sdelphij 1336170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1337170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1338171070Sdelphij 1339170808Sdelphij vnode_destroy_vobject(vp); 1340170808Sdelphij cache_purge(vp); 1341170808Sdelphij tmpfs_free_vp(vp); 1342170808Sdelphij 1343170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1344170808Sdelphij * we must free its associated data structures (now that the vnode 1345170808Sdelphij * is being reclaimed). */ 1346170808Sdelphij if (node->tn_links == 0) 1347170808Sdelphij tmpfs_free_node(tmp, node); 1348170808Sdelphij 1349170808Sdelphij MPASS(vp->v_data == NULL); 1350170808Sdelphij return 0; 1351170808Sdelphij} 1352170808Sdelphij 1353170808Sdelphij/* --------------------------------------------------------------------- */ 1354170808Sdelphij 1355171069Sdelphijstatic int 1356170808Sdelphijtmpfs_print(struct vop_print_args *v) 1357170808Sdelphij{ 1358170808Sdelphij struct vnode *vp = v->a_vp; 1359170808Sdelphij 1360170808Sdelphij struct tmpfs_node *node; 1361170808Sdelphij 1362170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1363170808Sdelphij 1364170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1365170808Sdelphij node, node->tn_flags, node->tn_links); 1366170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1367170808Sdelphij ", status 0x%x\n", 1368170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1369170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1370170808Sdelphij 1371170808Sdelphij if (vp->v_type == VFIFO) 1372170808Sdelphij fifo_printinfo(vp); 1373170808Sdelphij 1374170808Sdelphij printf("\n"); 1375170808Sdelphij 1376170808Sdelphij return 0; 1377170808Sdelphij} 1378170808Sdelphij 1379170808Sdelphij/* --------------------------------------------------------------------- */ 1380170808Sdelphij 1381171069Sdelphijstatic int 1382170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1383170808Sdelphij{ 1384170808Sdelphij int name = v->a_name; 1385170808Sdelphij register_t *retval = v->a_retval; 1386170808Sdelphij 1387170808Sdelphij int error; 1388170808Sdelphij 1389170808Sdelphij error = 0; 1390170808Sdelphij 1391170808Sdelphij switch (name) { 1392170808Sdelphij case _PC_LINK_MAX: 1393170808Sdelphij *retval = LINK_MAX; 1394170808Sdelphij break; 1395170808Sdelphij 1396170808Sdelphij case _PC_NAME_MAX: 1397170808Sdelphij *retval = NAME_MAX; 1398170808Sdelphij break; 1399170808Sdelphij 1400170808Sdelphij case _PC_PATH_MAX: 1401170808Sdelphij *retval = PATH_MAX; 1402170808Sdelphij break; 1403170808Sdelphij 1404170808Sdelphij case _PC_PIPE_BUF: 1405170808Sdelphij *retval = PIPE_BUF; 1406170808Sdelphij break; 1407170808Sdelphij 1408170808Sdelphij case _PC_CHOWN_RESTRICTED: 1409170808Sdelphij *retval = 1; 1410170808Sdelphij break; 1411170808Sdelphij 1412170808Sdelphij case _PC_NO_TRUNC: 1413170808Sdelphij *retval = 1; 1414170808Sdelphij break; 1415170808Sdelphij 1416170808Sdelphij case _PC_SYNC_IO: 1417170808Sdelphij *retval = 1; 1418170808Sdelphij break; 1419170808Sdelphij 1420170808Sdelphij case _PC_FILESIZEBITS: 1421170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1422170808Sdelphij break; 1423170808Sdelphij 1424170808Sdelphij default: 1425170808Sdelphij error = EINVAL; 1426170808Sdelphij } 1427170808Sdelphij 1428170808Sdelphij return error; 1429170808Sdelphij} 1430170808Sdelphij 1431171069Sdelphijstatic int 1432170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1433170808Sdelphij{ 1434170808Sdelphij struct tmpfs_fid *tfhp; 1435170808Sdelphij struct tmpfs_node *node; 1436170808Sdelphij 1437170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1438170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1439170808Sdelphij 1440170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1441170808Sdelphij tfhp->tf_id = node->tn_id; 1442170808Sdelphij tfhp->tf_gen = node->tn_gen; 1443171070Sdelphij 1444170808Sdelphij return (0); 1445170808Sdelphij} 1446171069Sdelphij 1447171069Sdelphij/* --------------------------------------------------------------------- */ 1448171069Sdelphij 1449171069Sdelphij/* 1450171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1451171069Sdelphij */ 1452171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1453171069Sdelphij .vop_default = &default_vnodeops, 1454171069Sdelphij .vop_lookup = vfs_cache_lookup, 1455171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1456171069Sdelphij .vop_create = tmpfs_create, 1457171069Sdelphij .vop_mknod = tmpfs_mknod, 1458171069Sdelphij .vop_open = tmpfs_open, 1459171069Sdelphij .vop_close = tmpfs_close, 1460171069Sdelphij .vop_access = tmpfs_access, 1461171069Sdelphij .vop_getattr = tmpfs_getattr, 1462171069Sdelphij .vop_setattr = tmpfs_setattr, 1463171069Sdelphij .vop_read = tmpfs_read, 1464171069Sdelphij .vop_write = tmpfs_write, 1465171069Sdelphij .vop_fsync = tmpfs_fsync, 1466171069Sdelphij .vop_remove = tmpfs_remove, 1467171069Sdelphij .vop_link = tmpfs_link, 1468171069Sdelphij .vop_rename = tmpfs_rename, 1469171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1470171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1471171069Sdelphij .vop_symlink = tmpfs_symlink, 1472171069Sdelphij .vop_readdir = tmpfs_readdir, 1473171069Sdelphij .vop_readlink = tmpfs_readlink, 1474171069Sdelphij .vop_inactive = tmpfs_inactive, 1475171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1476171069Sdelphij .vop_print = tmpfs_print, 1477171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1478171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1479171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1480171069Sdelphij}; 1481171069Sdelphij 1482