tmpfs_vnops.c revision 182739
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 182739 2008-09-03 18:53:48Z delphij $"); 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) ? 367170808Sdelphij node->tn_rdev : VNOVAL; 368170808Sdelphij vap->va_bytes = round_page(node->tn_size); 369170808Sdelphij vap->va_filerev = VNOVAL; 370170808Sdelphij vap->va_vaflags = 0; 371170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 372170808Sdelphij 373170808Sdelphij return 0; 374170808Sdelphij} 375170808Sdelphij 376170808Sdelphij/* --------------------------------------------------------------------- */ 377170808Sdelphij 378170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 379170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 380170808Sdelphijint 381170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 382170808Sdelphij{ 383170808Sdelphij struct vnode *vp = v->a_vp; 384170808Sdelphij struct vattr *vap = v->a_vap; 385170808Sdelphij struct ucred *cred = v->a_cred; 386182371Sattilio struct thread *td = curthread; 387170808Sdelphij 388170808Sdelphij int error; 389170808Sdelphij 390176559Sattilio MPASS(VOP_ISLOCKED(vp)); 391170808Sdelphij 392170808Sdelphij error = 0; 393170808Sdelphij 394170808Sdelphij /* Abort if any unsettable attribute is given. */ 395170808Sdelphij if (vap->va_type != VNON || 396170808Sdelphij vap->va_nlink != VNOVAL || 397170808Sdelphij vap->va_fsid != VNOVAL || 398170808Sdelphij vap->va_fileid != VNOVAL || 399170808Sdelphij vap->va_blocksize != VNOVAL || 400170808Sdelphij vap->va_gen != VNOVAL || 401170808Sdelphij vap->va_rdev != VNOVAL || 402170808Sdelphij vap->va_bytes != VNOVAL) 403170808Sdelphij error = EINVAL; 404170808Sdelphij 405170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 406182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 407170808Sdelphij 408170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 409182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 410170808Sdelphij 411170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 412182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 413170808Sdelphij 414170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 415182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 416170808Sdelphij 417170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 418170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 419170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 420170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 421170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 422170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 423171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 424182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 425170808Sdelphij 426170808Sdelphij /* Update the node times. We give preference to the error codes 427170808Sdelphij * generated by this function rather than the ones that may arise 428170808Sdelphij * from tmpfs_update. */ 429170808Sdelphij tmpfs_update(vp); 430170808Sdelphij 431176559Sattilio MPASS(VOP_ISLOCKED(vp)); 432170808Sdelphij 433170808Sdelphij return error; 434170808Sdelphij} 435170808Sdelphij 436170808Sdelphij/* --------------------------------------------------------------------- */ 437171489Sdelphij 438170808Sdelphijstatic int 439171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 440170808Sdelphij{ 441171489Sdelphij vm_pindex_t idx; 442171489Sdelphij vm_page_t m; 443171489Sdelphij struct sf_buf *sf; 444171489Sdelphij off_t offset, addr; 445171489Sdelphij size_t tlen; 446171489Sdelphij caddr_t va; 447171489Sdelphij int error; 448170808Sdelphij 449171489Sdelphij addr = uio->uio_offset; 450171489Sdelphij idx = OFF_TO_IDX(addr); 451171489Sdelphij offset = addr & PAGE_MASK; 452171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 453170808Sdelphij 454171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 455171489Sdelphij goto nocache; 456170808Sdelphij 457171489Sdelphij VM_OBJECT_LOCK(vobj); 458171489Sdelphijlookupvpg: 459171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 460171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 461171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 462171489Sdelphij goto lookupvpg; 463171489Sdelphij vm_page_busy(m); 464171489Sdelphij VM_OBJECT_UNLOCK(vobj); 465170808Sdelphij sched_pin(); 466170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 467171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 468171489Sdelphij error = uiomove(va + offset, tlen, uio); 469170808Sdelphij sf_buf_free(sf); 470170808Sdelphij sched_unpin(); 471171489Sdelphij VM_OBJECT_LOCK(vobj); 472171489Sdelphij vm_page_wakeup(m); 473171489Sdelphij VM_OBJECT_UNLOCK(vobj); 474171489Sdelphij return (error); 475171799Sdelphij } 476171489Sdelphij VM_OBJECT_UNLOCK(vobj); 477171489Sdelphijnocache: 478171489Sdelphij VM_OBJECT_LOCK(tobj); 479171489Sdelphij vm_object_pip_add(tobj, 1); 480171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 481171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 482171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 483171489Sdelphij int behind, ahead; 484171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 485171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 486171489Sdelphij if (error != 0) { 487171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 488171489Sdelphij goto out; 489171489Sdelphij } 490171489Sdelphij } else 491170808Sdelphij vm_page_zero_invalid(m, TRUE); 492170808Sdelphij } 493171489Sdelphij VM_OBJECT_UNLOCK(tobj); 494171489Sdelphij sched_pin(); 495171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 496171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 497171489Sdelphij error = uiomove(va + offset, tlen, uio); 498171489Sdelphij sf_buf_free(sf); 499171489Sdelphij sched_unpin(); 500171489Sdelphij VM_OBJECT_LOCK(tobj); 501171308Sdelphijout: 502171489Sdelphij vm_page_lock_queues(); 503171489Sdelphij vm_page_unwire(m, 0); 504171489Sdelphij vm_page_activate(m); 505171489Sdelphij vm_page_unlock_queues(); 506171489Sdelphij vm_page_wakeup(m); 507171489Sdelphij vm_object_pip_subtract(tobj, 1); 508171489Sdelphij VM_OBJECT_UNLOCK(tobj); 509171489Sdelphij 510171489Sdelphij return (error); 511170808Sdelphij} 512170808Sdelphij 513171069Sdelphijstatic int 514170808Sdelphijtmpfs_read(struct vop_read_args *v) 515170808Sdelphij{ 516170808Sdelphij struct vnode *vp = v->a_vp; 517170808Sdelphij struct uio *uio = v->a_uio; 518170808Sdelphij 519170808Sdelphij struct tmpfs_node *node; 520170808Sdelphij vm_object_t uobj; 521171489Sdelphij size_t len; 522171489Sdelphij int resid; 523170808Sdelphij 524174265Swkoszek int error = 0; 525170808Sdelphij 526170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 527170808Sdelphij 528170808Sdelphij if (vp->v_type != VREG) { 529170808Sdelphij error = EISDIR; 530170808Sdelphij goto out; 531170808Sdelphij } 532170808Sdelphij 533170808Sdelphij if (uio->uio_offset < 0) { 534170808Sdelphij error = EINVAL; 535170808Sdelphij goto out; 536170808Sdelphij } 537170808Sdelphij 538170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 539170808Sdelphij 540170808Sdelphij uobj = node->tn_reg.tn_aobj; 541171489Sdelphij while ((resid = uio->uio_resid) > 0) { 542171489Sdelphij error = 0; 543171489Sdelphij if (node->tn_size <= uio->uio_offset) 544171489Sdelphij break; 545171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 546171489Sdelphij if (len == 0) 547171489Sdelphij break; 548171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 549171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 550171489Sdelphij break; 551171489Sdelphij } 552170808Sdelphij 553170808Sdelphijout: 554170808Sdelphij 555170808Sdelphij return error; 556170808Sdelphij} 557170808Sdelphij 558170808Sdelphij/* --------------------------------------------------------------------- */ 559170808Sdelphij 560171069Sdelphijstatic int 561171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 562171489Sdelphij{ 563171489Sdelphij vm_pindex_t idx; 564171489Sdelphij vm_page_t vpg, tpg; 565171489Sdelphij struct sf_buf *sf; 566171489Sdelphij off_t offset, addr; 567171489Sdelphij size_t tlen; 568171489Sdelphij caddr_t va; 569171489Sdelphij int error; 570171489Sdelphij 571174265Swkoszek error = 0; 572174265Swkoszek 573171489Sdelphij addr = uio->uio_offset; 574171489Sdelphij idx = OFF_TO_IDX(addr); 575171489Sdelphij offset = addr & PAGE_MASK; 576171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 577171489Sdelphij 578171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 579171489Sdelphij vpg = NULL; 580171489Sdelphij goto nocache; 581171489Sdelphij } 582171489Sdelphij 583171489Sdelphij VM_OBJECT_LOCK(vobj); 584171489Sdelphijlookupvpg: 585171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 586171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 587171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 588171489Sdelphij goto lookupvpg; 589171489Sdelphij vm_page_busy(vpg); 590171489Sdelphij vm_page_lock_queues(); 591171489Sdelphij vm_page_undirty(vpg); 592171489Sdelphij vm_page_unlock_queues(); 593171489Sdelphij VM_OBJECT_UNLOCK(vobj); 594171489Sdelphij sched_pin(); 595171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 596171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 597171489Sdelphij error = uiomove(va + offset, tlen, uio); 598171489Sdelphij sf_buf_free(sf); 599171489Sdelphij sched_unpin(); 600171489Sdelphij } else { 601171489Sdelphij VM_OBJECT_UNLOCK(vobj); 602171489Sdelphij vpg = NULL; 603171489Sdelphij } 604171489Sdelphijnocache: 605171489Sdelphij VM_OBJECT_LOCK(tobj); 606171489Sdelphij vm_object_pip_add(tobj, 1); 607171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 608171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 609171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 610171489Sdelphij int behind, ahead; 611171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 612171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 613171489Sdelphij if (error != 0) { 614171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 615171489Sdelphij goto out; 616171489Sdelphij } 617171489Sdelphij } else 618171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 619171489Sdelphij } 620171489Sdelphij VM_OBJECT_UNLOCK(tobj); 621171489Sdelphij if (vpg == NULL) { 622171489Sdelphij sched_pin(); 623171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 624171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 625171489Sdelphij error = uiomove(va + offset, tlen, uio); 626171489Sdelphij sf_buf_free(sf); 627171489Sdelphij sched_unpin(); 628171489Sdelphij } else { 629171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 630171489Sdelphij pmap_copy_page(vpg, tpg); 631171489Sdelphij } 632171489Sdelphij VM_OBJECT_LOCK(tobj); 633171489Sdelphijout: 634171489Sdelphij if (vobj != NULL) 635171489Sdelphij VM_OBJECT_LOCK(vobj); 636171489Sdelphij vm_page_lock_queues(); 637171489Sdelphij if (error == 0) { 638171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 639171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 640171489Sdelphij vm_page_dirty(tpg); 641171489Sdelphij } 642171489Sdelphij vm_page_unwire(tpg, 0); 643171489Sdelphij vm_page_activate(tpg); 644171489Sdelphij vm_page_unlock_queues(); 645171489Sdelphij vm_page_wakeup(tpg); 646171489Sdelphij if (vpg != NULL) 647171489Sdelphij vm_page_wakeup(vpg); 648171489Sdelphij if (vobj != NULL) 649171489Sdelphij VM_OBJECT_UNLOCK(vobj); 650171489Sdelphij vm_object_pip_subtract(tobj, 1); 651171489Sdelphij VM_OBJECT_UNLOCK(tobj); 652171489Sdelphij 653171489Sdelphij return (error); 654171489Sdelphij} 655171489Sdelphij 656171489Sdelphijstatic int 657170808Sdelphijtmpfs_write(struct vop_write_args *v) 658170808Sdelphij{ 659170808Sdelphij struct vnode *vp = v->a_vp; 660170808Sdelphij struct uio *uio = v->a_uio; 661170808Sdelphij int ioflag = v->a_ioflag; 662170808Sdelphij struct thread *td = uio->uio_td; 663170808Sdelphij 664170808Sdelphij boolean_t extended; 665171489Sdelphij int error = 0; 666170808Sdelphij off_t oldsize; 667170808Sdelphij struct tmpfs_node *node; 668170808Sdelphij vm_object_t uobj; 669171489Sdelphij size_t len; 670171489Sdelphij int resid; 671170808Sdelphij 672170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 673170808Sdelphij oldsize = node->tn_size; 674170808Sdelphij 675170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 676170808Sdelphij error = EINVAL; 677170808Sdelphij goto out; 678170808Sdelphij } 679170808Sdelphij 680170808Sdelphij if (uio->uio_resid == 0) { 681170808Sdelphij error = 0; 682170808Sdelphij goto out; 683170808Sdelphij } 684170808Sdelphij 685170808Sdelphij if (ioflag & IO_APPEND) 686170808Sdelphij uio->uio_offset = node->tn_size; 687171070Sdelphij 688171070Sdelphij if (uio->uio_offset + uio->uio_resid > 689170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 690170808Sdelphij return (EFBIG); 691170808Sdelphij 692170808Sdelphij if (vp->v_type == VREG && td != NULL) { 693170808Sdelphij PROC_LOCK(td->td_proc); 694170808Sdelphij if (uio->uio_offset + uio->uio_resid > 695170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 696170808Sdelphij psignal(td->td_proc, SIGXFSZ); 697170808Sdelphij PROC_UNLOCK(td->td_proc); 698170808Sdelphij return (EFBIG); 699170808Sdelphij } 700170808Sdelphij PROC_UNLOCK(td->td_proc); 701170808Sdelphij } 702170808Sdelphij 703170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 704170808Sdelphij if (extended) { 705170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 706170808Sdelphij if (error != 0) 707170808Sdelphij goto out; 708170808Sdelphij } 709170808Sdelphij 710170808Sdelphij uobj = node->tn_reg.tn_aobj; 711171489Sdelphij while ((resid = uio->uio_resid) > 0) { 712171489Sdelphij if (node->tn_size <= uio->uio_offset) 713171489Sdelphij break; 714171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 715171489Sdelphij if (len == 0) 716171489Sdelphij break; 717171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 718171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 719171489Sdelphij break; 720171489Sdelphij } 721170808Sdelphij 722170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 723170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 724170808Sdelphij 725170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 726170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 727170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 728170808Sdelphij } 729170808Sdelphij 730170808Sdelphij if (error != 0) 731170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 732170808Sdelphij 733170808Sdelphijout: 734170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 735170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 736170808Sdelphij 737170808Sdelphij return error; 738170808Sdelphij} 739170808Sdelphij 740170808Sdelphij/* --------------------------------------------------------------------- */ 741170808Sdelphij 742171069Sdelphijstatic int 743170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 744170808Sdelphij{ 745170808Sdelphij struct vnode *vp = v->a_vp; 746170808Sdelphij 747176559Sattilio MPASS(VOP_ISLOCKED(vp)); 748170808Sdelphij 749170808Sdelphij tmpfs_update(vp); 750170808Sdelphij 751170808Sdelphij return 0; 752170808Sdelphij} 753170808Sdelphij 754170808Sdelphij/* --------------------------------------------------------------------- */ 755170808Sdelphij 756171069Sdelphijstatic int 757170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 758170808Sdelphij{ 759170808Sdelphij struct vnode *dvp = v->a_dvp; 760170808Sdelphij struct vnode *vp = v->a_vp; 761170808Sdelphij 762170808Sdelphij int error; 763170808Sdelphij struct tmpfs_dirent *de; 764170808Sdelphij struct tmpfs_mount *tmp; 765170808Sdelphij struct tmpfs_node *dnode; 766170808Sdelphij struct tmpfs_node *node; 767170808Sdelphij 768176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 769176559Sattilio MPASS(VOP_ISLOCKED(vp)); 770170808Sdelphij 771170808Sdelphij if (vp->v_type == VDIR) { 772170808Sdelphij error = EISDIR; 773170808Sdelphij goto out; 774170808Sdelphij } 775170808Sdelphij 776170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 777170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 778170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 779173725Sdelphij de = tmpfs_dir_search(dnode, node); 780170808Sdelphij MPASS(de != NULL); 781170808Sdelphij 782170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 783170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 784170808Sdelphij (dnode->tn_flags & APPEND)) { 785170808Sdelphij error = EPERM; 786170808Sdelphij goto out; 787170808Sdelphij } 788170808Sdelphij 789170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 790170808Sdelphij * have to change the number of hard links of the directory. */ 791170808Sdelphij tmpfs_dir_detach(dvp, de); 792170808Sdelphij 793170808Sdelphij /* Free the directory entry we just deleted. Note that the node 794170808Sdelphij * referred by it will not be removed until the vnode is really 795170808Sdelphij * reclaimed. */ 796170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 797170808Sdelphij 798170808Sdelphij if (node->tn_links > 0) 799170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 800170808Sdelphij TMPFS_NODE_MODIFIED; 801170808Sdelphij error = 0; 802170808Sdelphij 803170808Sdelphijout: 804170808Sdelphij 805170808Sdelphij return error; 806170808Sdelphij} 807170808Sdelphij 808170808Sdelphij/* --------------------------------------------------------------------- */ 809170808Sdelphij 810171069Sdelphijstatic int 811170808Sdelphijtmpfs_link(struct vop_link_args *v) 812170808Sdelphij{ 813170808Sdelphij struct vnode *dvp = v->a_tdvp; 814170808Sdelphij struct vnode *vp = v->a_vp; 815170808Sdelphij struct componentname *cnp = v->a_cnp; 816170808Sdelphij 817170808Sdelphij int error; 818170808Sdelphij struct tmpfs_dirent *de; 819170808Sdelphij struct tmpfs_node *node; 820170808Sdelphij 821176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 822170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 823170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 824170808Sdelphij 825170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 826170808Sdelphij 827170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 828170808Sdelphij 829170808Sdelphij /* Hard links of directories are forbidden. */ 830170808Sdelphij if (vp->v_type == VDIR) { 831170808Sdelphij error = EPERM; 832170808Sdelphij goto out; 833170808Sdelphij } 834170808Sdelphij 835170808Sdelphij /* Cannot create cross-device links. */ 836170808Sdelphij if (dvp->v_mount != vp->v_mount) { 837170808Sdelphij error = EXDEV; 838170808Sdelphij goto out; 839170808Sdelphij } 840170808Sdelphij 841170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 842170808Sdelphij * by the system. */ 843170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 844170808Sdelphij if (node->tn_links == LINK_MAX) { 845170808Sdelphij error = EMLINK; 846170808Sdelphij goto out; 847170808Sdelphij } 848170808Sdelphij 849170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 850170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 851170808Sdelphij error = EPERM; 852170808Sdelphij goto out; 853170808Sdelphij } 854170808Sdelphij 855170808Sdelphij /* Allocate a new directory entry to represent the node. */ 856170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 857170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 858170808Sdelphij if (error != 0) 859170808Sdelphij goto out; 860170808Sdelphij 861170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 862170808Sdelphij tmpfs_dir_attach(dvp, de); 863170808Sdelphij 864170808Sdelphij /* vp link count has changed, so update node times. */ 865170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 866170808Sdelphij tmpfs_update(vp); 867170808Sdelphij 868170808Sdelphij error = 0; 869171070Sdelphij 870170808Sdelphijout: 871170808Sdelphij return error; 872170808Sdelphij} 873170808Sdelphij 874170808Sdelphij/* --------------------------------------------------------------------- */ 875170808Sdelphij 876171069Sdelphijstatic int 877170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 878170808Sdelphij{ 879170808Sdelphij struct vnode *fdvp = v->a_fdvp; 880170808Sdelphij struct vnode *fvp = v->a_fvp; 881170808Sdelphij struct componentname *fcnp = v->a_fcnp; 882170808Sdelphij struct vnode *tdvp = v->a_tdvp; 883170808Sdelphij struct vnode *tvp = v->a_tvp; 884170808Sdelphij struct componentname *tcnp = v->a_tcnp; 885170808Sdelphij 886170808Sdelphij char *newname; 887170808Sdelphij int error; 888170808Sdelphij struct tmpfs_dirent *de; 889170808Sdelphij struct tmpfs_node *fdnode; 890170808Sdelphij struct tmpfs_node *fnode; 891171799Sdelphij struct tmpfs_node *tnode; 892170808Sdelphij struct tmpfs_node *tdnode; 893170808Sdelphij 894176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 895176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 896170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 897170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 898170808Sdelphij 899171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 900170808Sdelphij 901170808Sdelphij /* Disallow cross-device renames. 902170808Sdelphij * XXX Why isn't this done by the caller? */ 903170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 904170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 905170808Sdelphij error = EXDEV; 906170808Sdelphij goto out; 907170808Sdelphij } 908170808Sdelphij 909170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 910170808Sdelphij 911170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 912170808Sdelphij if (fvp == tvp) { 913170808Sdelphij error = 0; 914170808Sdelphij goto out; 915170808Sdelphij } 916170808Sdelphij 917173725Sdelphij /* If we need to move the directory between entries, lock the 918173725Sdelphij * source so that we can safely operate on it. */ 919173725Sdelphij if (tdvp != fdvp) { 920175202Sattilio error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 921173725Sdelphij if (error != 0) 922173725Sdelphij goto out; 923173725Sdelphij } 924173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 925173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 926173725Sdelphij de = tmpfs_dir_search(fdnode, fnode); 927173725Sdelphij 928170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 929170808Sdelphij if (de == NULL) { 930170808Sdelphij MPASS(fvp->v_type == VDIR); 931170808Sdelphij error = EINVAL; 932173725Sdelphij goto out_locked; 933170808Sdelphij } 934170808Sdelphij MPASS(de->td_node == fnode); 935170808Sdelphij 936171070Sdelphij /* If re-naming a directory to another preexisting directory 937170808Sdelphij * ensure that the target directory is empty so that its 938171070Sdelphij * removal causes no side effects. 939170808Sdelphij * Kern_rename gurantees the destination to be a directory 940170808Sdelphij * if the source is one. */ 941170808Sdelphij if (tvp != NULL) { 942171799Sdelphij MPASS(tnode != NULL); 943171070Sdelphij 944170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 945170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 946170808Sdelphij error = EPERM; 947173725Sdelphij goto out_locked; 948170808Sdelphij } 949170808Sdelphij 950171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 951171799Sdelphij if (tnode->tn_size > 0) { 952171799Sdelphij error = ENOTEMPTY; 953173725Sdelphij goto out_locked; 954171799Sdelphij } 955171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 956171799Sdelphij error = ENOTDIR; 957173725Sdelphij goto out_locked; 958171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 959171799Sdelphij error = EISDIR; 960173725Sdelphij goto out_locked; 961171799Sdelphij } else { 962171799Sdelphij MPASS(fnode->tn_type != VDIR && 963171799Sdelphij tnode->tn_type != VDIR); 964170808Sdelphij } 965170808Sdelphij } 966170808Sdelphij 967170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 968170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 969170808Sdelphij error = EPERM; 970170808Sdelphij goto out_locked; 971170808Sdelphij } 972170808Sdelphij 973170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 974170808Sdelphij * has to be changed. */ 975170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 976170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 977171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 978170808Sdelphij } else 979170808Sdelphij newname = NULL; 980170808Sdelphij 981170808Sdelphij /* If the node is being moved to another directory, we have to do 982170808Sdelphij * the move. */ 983170808Sdelphij if (fdnode != tdnode) { 984170808Sdelphij /* In case we are moving a directory, we have to adjust its 985170808Sdelphij * parent to point to the new parent. */ 986170808Sdelphij if (de->td_node->tn_type == VDIR) { 987170808Sdelphij struct tmpfs_node *n; 988170808Sdelphij 989170808Sdelphij /* Ensure the target directory is not a child of the 990170808Sdelphij * directory being moved. Otherwise, we'd end up 991170808Sdelphij * with stale nodes. */ 992170808Sdelphij n = tdnode; 993170808Sdelphij while (n != n->tn_dir.tn_parent) { 994170808Sdelphij if (n == fnode) { 995170808Sdelphij error = EINVAL; 996170808Sdelphij if (newname != NULL) 997171087Sdelphij free(newname, M_TMPFSNAME); 998170808Sdelphij goto out_locked; 999170808Sdelphij } 1000170808Sdelphij n = n->tn_dir.tn_parent; 1001170808Sdelphij } 1002170808Sdelphij 1003170808Sdelphij /* Adjust the parent pointer. */ 1004170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1005170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1006170808Sdelphij 1007170808Sdelphij /* As a result of changing the target of the '..' 1008170808Sdelphij * entry, the link count of the source and target 1009170808Sdelphij * directories has to be adjusted. */ 1010170808Sdelphij fdnode->tn_links--; 1011170808Sdelphij tdnode->tn_links++; 1012170808Sdelphij } 1013170808Sdelphij 1014170808Sdelphij /* Do the move: just remove the entry from the source directory 1015170808Sdelphij * and insert it into the target one. */ 1016170808Sdelphij tmpfs_dir_detach(fdvp, de); 1017170808Sdelphij tmpfs_dir_attach(tdvp, de); 1018170808Sdelphij } 1019170808Sdelphij 1020170808Sdelphij /* If the name has changed, we need to make it effective by changing 1021170808Sdelphij * it in the directory entry. */ 1022170808Sdelphij if (newname != NULL) { 1023170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1024170808Sdelphij 1025171087Sdelphij free(de->td_name, M_TMPFSNAME); 1026170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1027170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1028170808Sdelphij de->td_name = newname; 1029170808Sdelphij 1030170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1031170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1032170808Sdelphij } 1033170808Sdelphij 1034170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1035170808Sdelphij * from the target directory. */ 1036170808Sdelphij if (tvp != NULL) { 1037170808Sdelphij /* Remove the old entry from the target directory. */ 1038173725Sdelphij de = tmpfs_dir_search(tdnode, tnode); 1039170808Sdelphij tmpfs_dir_detach(tdvp, de); 1040170808Sdelphij 1041170808Sdelphij /* Free the directory entry we just deleted. Note that the 1042170808Sdelphij * node referred by it will not be removed until the vnode is 1043170808Sdelphij * really reclaimed. */ 1044170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1045170808Sdelphij } 1046170808Sdelphij 1047170808Sdelphij error = 0; 1048170808Sdelphij 1049170808Sdelphijout_locked: 1050170808Sdelphij if (fdnode != tdnode) 1051175294Sattilio VOP_UNLOCK(fdvp, 0); 1052170808Sdelphij 1053170808Sdelphijout: 1054170808Sdelphij /* Release target nodes. */ 1055170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1056170808Sdelphij * other code takes care of this... */ 1057170808Sdelphij if (tdvp == tvp) 1058170808Sdelphij vrele(tdvp); 1059170808Sdelphij else 1060170808Sdelphij vput(tdvp); 1061170808Sdelphij if (tvp != NULL) 1062170808Sdelphij vput(tvp); 1063170808Sdelphij 1064170808Sdelphij /* Release source nodes. */ 1065170808Sdelphij vrele(fdvp); 1066170808Sdelphij vrele(fvp); 1067170808Sdelphij 1068170808Sdelphij return error; 1069170808Sdelphij} 1070170808Sdelphij 1071170808Sdelphij/* --------------------------------------------------------------------- */ 1072170808Sdelphij 1073171069Sdelphijstatic int 1074170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1075170808Sdelphij{ 1076170808Sdelphij struct vnode *dvp = v->a_dvp; 1077170808Sdelphij struct vnode **vpp = v->a_vpp; 1078170808Sdelphij struct componentname *cnp = v->a_cnp; 1079170808Sdelphij struct vattr *vap = v->a_vap; 1080170808Sdelphij 1081170808Sdelphij MPASS(vap->va_type == VDIR); 1082170808Sdelphij 1083170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1084170808Sdelphij} 1085170808Sdelphij 1086170808Sdelphij/* --------------------------------------------------------------------- */ 1087170808Sdelphij 1088171069Sdelphijstatic int 1089170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1090170808Sdelphij{ 1091170808Sdelphij struct vnode *dvp = v->a_dvp; 1092170808Sdelphij struct vnode *vp = v->a_vp; 1093170808Sdelphij 1094170808Sdelphij int error; 1095170808Sdelphij struct tmpfs_dirent *de; 1096170808Sdelphij struct tmpfs_mount *tmp; 1097170808Sdelphij struct tmpfs_node *dnode; 1098170808Sdelphij struct tmpfs_node *node; 1099170808Sdelphij 1100176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1101176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1102170808Sdelphij 1103170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1104170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1105170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1106170808Sdelphij 1107171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1108171070Sdelphij * removed. */ 1109171070Sdelphij if (node->tn_size > 0) { 1110171070Sdelphij error = ENOTEMPTY; 1111171070Sdelphij goto out; 1112171070Sdelphij } 1113170808Sdelphij 1114170808Sdelphij if ((dnode->tn_flags & APPEND) 1115170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1116170808Sdelphij error = EPERM; 1117170808Sdelphij goto out; 1118170808Sdelphij } 1119170808Sdelphij 1120171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1121171070Sdelphij * We checked for that above so this is safe now. */ 1122170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1123170808Sdelphij 1124170808Sdelphij /* Get the directory entry associated with node (vp). This was 1125170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1126173725Sdelphij de = tmpfs_dir_search(dnode, node); 1127170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1128170808Sdelphij v->a_cnp->cn_nameptr, 1129170808Sdelphij v->a_cnp->cn_namelen)); 1130170808Sdelphij 1131170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1132170808Sdelphij if (dnode->tn_flags & APPEND 1133170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1134170808Sdelphij error = EPERM; 1135170808Sdelphij goto out; 1136170808Sdelphij } 1137170808Sdelphij 1138170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1139170808Sdelphij tmpfs_dir_detach(dvp, de); 1140170808Sdelphij 1141170808Sdelphij node->tn_links--; 1142170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1143170808Sdelphij TMPFS_NODE_MODIFIED; 1144170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1145170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1146170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1147170808Sdelphij 1148171070Sdelphij cache_purge(dvp); 1149170808Sdelphij cache_purge(vp); 1150170808Sdelphij 1151170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1152170808Sdelphij * referred by it will not be removed until the vnode is really 1153170808Sdelphij * reclaimed. */ 1154170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1155170808Sdelphij 1156170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1157170808Sdelphij * interested parties and clean it from the cache). */ 1158170808Sdelphij 1159170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1160170808Sdelphij tmpfs_update(dvp); 1161170808Sdelphij 1162170808Sdelphij error = 0; 1163170808Sdelphij 1164170808Sdelphijout: 1165170808Sdelphij return error; 1166170808Sdelphij} 1167170808Sdelphij 1168170808Sdelphij/* --------------------------------------------------------------------- */ 1169170808Sdelphij 1170171069Sdelphijstatic int 1171170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1172170808Sdelphij{ 1173170808Sdelphij struct vnode *dvp = v->a_dvp; 1174170808Sdelphij struct vnode **vpp = v->a_vpp; 1175170808Sdelphij struct componentname *cnp = v->a_cnp; 1176170808Sdelphij struct vattr *vap = v->a_vap; 1177170808Sdelphij char *target = v->a_target; 1178170808Sdelphij 1179170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1180170808Sdelphij MPASS(vap->va_type == VLNK); 1181170808Sdelphij#else 1182170808Sdelphij vap->va_type = VLNK; 1183170808Sdelphij#endif 1184170808Sdelphij 1185170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1186170808Sdelphij} 1187170808Sdelphij 1188170808Sdelphij/* --------------------------------------------------------------------- */ 1189170808Sdelphij 1190171069Sdelphijstatic int 1191170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1192170808Sdelphij{ 1193170808Sdelphij struct vnode *vp = v->a_vp; 1194170808Sdelphij struct uio *uio = v->a_uio; 1195170808Sdelphij int *eofflag = v->a_eofflag; 1196170808Sdelphij u_long **cookies = v->a_cookies; 1197170808Sdelphij int *ncookies = v->a_ncookies; 1198170808Sdelphij 1199170808Sdelphij int error; 1200170808Sdelphij off_t startoff; 1201171802Sdelphij off_t cnt = 0; 1202170808Sdelphij struct tmpfs_node *node; 1203170808Sdelphij 1204170808Sdelphij /* This operation only makes sense on directory nodes. */ 1205171802Sdelphij if (vp->v_type != VDIR) 1206171802Sdelphij return ENOTDIR; 1207170808Sdelphij 1208170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1209170808Sdelphij 1210170808Sdelphij startoff = uio->uio_offset; 1211170808Sdelphij 1212171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1213170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1214171862Sdelphij if (error != 0) 1215171862Sdelphij goto outok; 1216171862Sdelphij cnt++; 1217171862Sdelphij } 1218171862Sdelphij 1219171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1220170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1221171862Sdelphij if (error != 0) 1222171862Sdelphij goto outok; 1223171862Sdelphij cnt++; 1224170808Sdelphij } 1225170808Sdelphij 1226171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1227171862Sdelphij 1228171862Sdelphijoutok: 1229171862Sdelphij MPASS(error >= -1); 1230171862Sdelphij 1231170808Sdelphij if (error == -1) 1232170808Sdelphij error = 0; 1233170808Sdelphij 1234170808Sdelphij if (eofflag != NULL) 1235170808Sdelphij *eofflag = 1236170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1237170808Sdelphij 1238170808Sdelphij /* Update NFS-related variables. */ 1239170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1240170808Sdelphij off_t i; 1241170808Sdelphij off_t off = startoff; 1242170808Sdelphij struct tmpfs_dirent *de = NULL; 1243170808Sdelphij 1244170808Sdelphij *ncookies = cnt; 1245170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1246170808Sdelphij 1247170808Sdelphij for (i = 0; i < cnt; i++) { 1248170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1249170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1250170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1251170808Sdelphij } else { 1252170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1253170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1254170808Sdelphij } else if (de != NULL) { 1255170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1256170808Sdelphij } else { 1257170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1258170808Sdelphij off); 1259170808Sdelphij MPASS(de != NULL); 1260170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1261170808Sdelphij } 1262171802Sdelphij if (de == NULL) 1263170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1264171802Sdelphij else 1265171802Sdelphij off = tmpfs_dircookie(de); 1266170808Sdelphij } 1267170808Sdelphij 1268170808Sdelphij (*cookies)[i] = off; 1269170808Sdelphij } 1270170808Sdelphij MPASS(uio->uio_offset == off); 1271170808Sdelphij } 1272170808Sdelphij 1273170808Sdelphij return error; 1274170808Sdelphij} 1275170808Sdelphij 1276170808Sdelphij/* --------------------------------------------------------------------- */ 1277170808Sdelphij 1278171069Sdelphijstatic int 1279170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1280170808Sdelphij{ 1281170808Sdelphij struct vnode *vp = v->a_vp; 1282170808Sdelphij struct uio *uio = v->a_uio; 1283170808Sdelphij 1284170808Sdelphij int error; 1285170808Sdelphij struct tmpfs_node *node; 1286170808Sdelphij 1287170808Sdelphij MPASS(uio->uio_offset == 0); 1288170808Sdelphij MPASS(vp->v_type == VLNK); 1289170808Sdelphij 1290170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1291170808Sdelphij 1292170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1293170808Sdelphij uio); 1294170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1295170808Sdelphij 1296170808Sdelphij return error; 1297170808Sdelphij} 1298170808Sdelphij 1299170808Sdelphij/* --------------------------------------------------------------------- */ 1300170808Sdelphij 1301171069Sdelphijstatic int 1302170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1303170808Sdelphij{ 1304170808Sdelphij struct vnode *vp = v->a_vp; 1305170808Sdelphij struct thread *l = v->a_td; 1306170808Sdelphij 1307170808Sdelphij struct tmpfs_node *node; 1308170808Sdelphij 1309176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1310170808Sdelphij 1311170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1312170808Sdelphij 1313170808Sdelphij if (node->tn_links == 0) 1314170808Sdelphij vrecycle(vp, l); 1315170808Sdelphij 1316170808Sdelphij return 0; 1317170808Sdelphij} 1318170808Sdelphij 1319170808Sdelphij/* --------------------------------------------------------------------- */ 1320170808Sdelphij 1321170808Sdelphijint 1322170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1323170808Sdelphij{ 1324170808Sdelphij struct vnode *vp = v->a_vp; 1325170808Sdelphij 1326170808Sdelphij struct tmpfs_mount *tmp; 1327170808Sdelphij struct tmpfs_node *node; 1328170808Sdelphij 1329170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1330170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1331171070Sdelphij 1332170808Sdelphij vnode_destroy_vobject(vp); 1333170808Sdelphij cache_purge(vp); 1334170808Sdelphij tmpfs_free_vp(vp); 1335170808Sdelphij 1336170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1337170808Sdelphij * we must free its associated data structures (now that the vnode 1338170808Sdelphij * is being reclaimed). */ 1339170808Sdelphij if (node->tn_links == 0) 1340170808Sdelphij tmpfs_free_node(tmp, node); 1341170808Sdelphij 1342170808Sdelphij MPASS(vp->v_data == NULL); 1343170808Sdelphij return 0; 1344170808Sdelphij} 1345170808Sdelphij 1346170808Sdelphij/* --------------------------------------------------------------------- */ 1347170808Sdelphij 1348171069Sdelphijstatic int 1349170808Sdelphijtmpfs_print(struct vop_print_args *v) 1350170808Sdelphij{ 1351170808Sdelphij struct vnode *vp = v->a_vp; 1352170808Sdelphij 1353170808Sdelphij struct tmpfs_node *node; 1354170808Sdelphij 1355170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1356170808Sdelphij 1357170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1358170808Sdelphij node, node->tn_flags, node->tn_links); 1359170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1360170808Sdelphij ", status 0x%x\n", 1361170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1362170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1363170808Sdelphij 1364170808Sdelphij if (vp->v_type == VFIFO) 1365170808Sdelphij fifo_printinfo(vp); 1366170808Sdelphij 1367170808Sdelphij printf("\n"); 1368170808Sdelphij 1369170808Sdelphij return 0; 1370170808Sdelphij} 1371170808Sdelphij 1372170808Sdelphij/* --------------------------------------------------------------------- */ 1373170808Sdelphij 1374171069Sdelphijstatic int 1375170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1376170808Sdelphij{ 1377170808Sdelphij int name = v->a_name; 1378170808Sdelphij register_t *retval = v->a_retval; 1379170808Sdelphij 1380170808Sdelphij int error; 1381170808Sdelphij 1382170808Sdelphij error = 0; 1383170808Sdelphij 1384170808Sdelphij switch (name) { 1385170808Sdelphij case _PC_LINK_MAX: 1386170808Sdelphij *retval = LINK_MAX; 1387170808Sdelphij break; 1388170808Sdelphij 1389170808Sdelphij case _PC_NAME_MAX: 1390170808Sdelphij *retval = NAME_MAX; 1391170808Sdelphij break; 1392170808Sdelphij 1393170808Sdelphij case _PC_PATH_MAX: 1394170808Sdelphij *retval = PATH_MAX; 1395170808Sdelphij break; 1396170808Sdelphij 1397170808Sdelphij case _PC_PIPE_BUF: 1398170808Sdelphij *retval = PIPE_BUF; 1399170808Sdelphij break; 1400170808Sdelphij 1401170808Sdelphij case _PC_CHOWN_RESTRICTED: 1402170808Sdelphij *retval = 1; 1403170808Sdelphij break; 1404170808Sdelphij 1405170808Sdelphij case _PC_NO_TRUNC: 1406170808Sdelphij *retval = 1; 1407170808Sdelphij break; 1408170808Sdelphij 1409170808Sdelphij case _PC_SYNC_IO: 1410170808Sdelphij *retval = 1; 1411170808Sdelphij break; 1412170808Sdelphij 1413170808Sdelphij case _PC_FILESIZEBITS: 1414170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1415170808Sdelphij break; 1416170808Sdelphij 1417170808Sdelphij default: 1418170808Sdelphij error = EINVAL; 1419170808Sdelphij } 1420170808Sdelphij 1421170808Sdelphij return error; 1422170808Sdelphij} 1423170808Sdelphij 1424171069Sdelphijstatic int 1425170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1426170808Sdelphij{ 1427170808Sdelphij struct tmpfs_fid *tfhp; 1428170808Sdelphij struct tmpfs_node *node; 1429170808Sdelphij 1430170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1431170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1432170808Sdelphij 1433170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1434170808Sdelphij tfhp->tf_id = node->tn_id; 1435170808Sdelphij tfhp->tf_gen = node->tn_gen; 1436171070Sdelphij 1437170808Sdelphij return (0); 1438170808Sdelphij} 1439171069Sdelphij 1440171069Sdelphij/* --------------------------------------------------------------------- */ 1441171069Sdelphij 1442171069Sdelphij/* 1443171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1444171069Sdelphij */ 1445171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1446171069Sdelphij .vop_default = &default_vnodeops, 1447171069Sdelphij .vop_lookup = vfs_cache_lookup, 1448171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1449171069Sdelphij .vop_create = tmpfs_create, 1450171069Sdelphij .vop_mknod = tmpfs_mknod, 1451171069Sdelphij .vop_open = tmpfs_open, 1452171069Sdelphij .vop_close = tmpfs_close, 1453171069Sdelphij .vop_access = tmpfs_access, 1454171069Sdelphij .vop_getattr = tmpfs_getattr, 1455171069Sdelphij .vop_setattr = tmpfs_setattr, 1456171069Sdelphij .vop_read = tmpfs_read, 1457171069Sdelphij .vop_write = tmpfs_write, 1458171069Sdelphij .vop_fsync = tmpfs_fsync, 1459171069Sdelphij .vop_remove = tmpfs_remove, 1460171069Sdelphij .vop_link = tmpfs_link, 1461171069Sdelphij .vop_rename = tmpfs_rename, 1462171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1463171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1464171069Sdelphij .vop_symlink = tmpfs_symlink, 1465171069Sdelphij .vop_readdir = tmpfs_readdir, 1466171069Sdelphij .vop_readlink = tmpfs_readlink, 1467171069Sdelphij .vop_inactive = tmpfs_inactive, 1468171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1469171069Sdelphij .vop_print = tmpfs_print, 1470171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1471171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1472171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1473171069Sdelphij}; 1474171069Sdelphij 1475