tmpfs_vnops.c revision 171489
1171069Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.35 2007/01/04 15:42:37 elad Exp $ */ 2170808Sdelphij 3170808Sdelphij/* 4170808Sdelphij * Copyright (c) 2005 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 171489 2007-07-19 03:34:50Z delphij $"); 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) { 98170808Sdelphij VOP_UNLOCK(dvp, 0, td); 99170808Sdelphij 100170808Sdelphij /* Allocate a new vnode on the matching entry. */ 101170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, vpp, td); 102170808Sdelphij 103170808Sdelphij vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 104170808Sdelphij 105170808Sdelphij dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 106170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 107170808Sdelphij VREF(dvp); 108170808Sdelphij *vpp = dvp; 109170808Sdelphij dnode->tn_lookup_dirent = NULL; 110170808Sdelphij error = 0; 111170808Sdelphij } else { 112170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 113170808Sdelphij if (de == NULL) { 114170808Sdelphij /* The entry was not found in the directory. 115170808Sdelphij * This is OK if we are creating or renaming an 116170808Sdelphij * entry and are working on the last component of 117170808Sdelphij * the path name. */ 118170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 119170808Sdelphij (cnp->cn_nameiop == CREATE || \ 120170808Sdelphij cnp->cn_nameiop == RENAME)) { 121170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 122170808Sdelphij cnp->cn_thread); 123170808Sdelphij if (error != 0) 124170808Sdelphij goto out; 125170808Sdelphij 126170808Sdelphij /* Keep the component name in the buffer for 127170808Sdelphij * future uses. */ 128170808Sdelphij cnp->cn_flags |= SAVENAME; 129170808Sdelphij 130170808Sdelphij error = EJUSTRETURN; 131170808Sdelphij } else 132170808Sdelphij error = ENOENT; 133170808Sdelphij } else { 134170808Sdelphij struct tmpfs_node *tnode; 135170808Sdelphij 136170808Sdelphij /* The entry was found, so get its associated 137170808Sdelphij * tmpfs_node. */ 138170808Sdelphij tnode = de->td_node; 139170808Sdelphij 140170808Sdelphij /* If we are not at the last path component and 141170808Sdelphij * found a non-directory or non-link entry (which 142170808Sdelphij * may itself be pointing to a directory), raise 143170808Sdelphij * an error. */ 144170808Sdelphij if ((tnode->tn_type != VDIR && 145170808Sdelphij tnode->tn_type != VLNK) && 146170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 147170808Sdelphij error = ENOTDIR; 148170808Sdelphij goto out; 149170808Sdelphij } 150170808Sdelphij 151170808Sdelphij /* If we are deleting or renaming the entry, keep 152170808Sdelphij * track of its tmpfs_dirent so that it can be 153170808Sdelphij * easily deleted later. */ 154170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 155170808Sdelphij (cnp->cn_nameiop == DELETE || 156170808Sdelphij cnp->cn_nameiop == RENAME)) { 157170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 158170808Sdelphij cnp->cn_thread); 159170808Sdelphij if (error != 0) 160170808Sdelphij goto out; 161171070Sdelphij 162170808Sdelphij /* Allocate a new vnode on the matching entry. */ 163170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 164170808Sdelphij if (error != 0) 165170808Sdelphij goto out; 166170808Sdelphij 167170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 168170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 169170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 170170808Sdelphij error = EPERM; 171170808Sdelphij vput(*vpp); 172170808Sdelphij *vpp = NULL; 173170808Sdelphij goto out; 174171070Sdelphij } 175170808Sdelphij tnode->tn_lookup_dirent = de; 176170808Sdelphij cnp->cn_flags |= SAVENAME; 177170808Sdelphij } 178170808Sdelphij else 179170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 180170808Sdelphij 181170808Sdelphij } 182170808Sdelphij } 183170808Sdelphij 184170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 185170808Sdelphij * request was for creation, as it does not improve timings on 186170808Sdelphij * emprical tests. */ 187170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 188170808Sdelphij cache_enter(dvp, *vpp, cnp); 189170808Sdelphij 190170808Sdelphijout: 191170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 192170808Sdelphij * locked. */ 193170808Sdelphij MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 194170808Sdelphij 195170808Sdelphij return error; 196170808Sdelphij} 197170808Sdelphij 198170808Sdelphij/* --------------------------------------------------------------------- */ 199170808Sdelphij 200171069Sdelphijstatic int 201170808Sdelphijtmpfs_create(struct vop_create_args *v) 202170808Sdelphij{ 203170808Sdelphij struct vnode *dvp = v->a_dvp; 204170808Sdelphij struct vnode **vpp = v->a_vpp; 205170808Sdelphij struct componentname *cnp = v->a_cnp; 206170808Sdelphij struct vattr *vap = v->a_vap; 207170808Sdelphij 208170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 209170808Sdelphij 210170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 211170808Sdelphij} 212170808Sdelphij/* --------------------------------------------------------------------- */ 213170808Sdelphij 214171069Sdelphijstatic int 215170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 216170808Sdelphij{ 217170808Sdelphij struct vnode *dvp = v->a_dvp; 218170808Sdelphij struct vnode **vpp = v->a_vpp; 219170808Sdelphij struct componentname *cnp = v->a_cnp; 220170808Sdelphij struct vattr *vap = v->a_vap; 221170808Sdelphij 222170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 223170808Sdelphij vap->va_type != VFIFO) 224170808Sdelphij return EINVAL; 225170808Sdelphij 226170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 227170808Sdelphij} 228170808Sdelphij 229170808Sdelphij/* --------------------------------------------------------------------- */ 230170808Sdelphij 231171069Sdelphijstatic int 232170808Sdelphijtmpfs_open(struct vop_open_args *v) 233170808Sdelphij{ 234170808Sdelphij struct vnode *vp = v->a_vp; 235170808Sdelphij int mode = v->a_mode; 236170808Sdelphij 237170808Sdelphij int error; 238170808Sdelphij struct tmpfs_node *node; 239170808Sdelphij 240170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 241170808Sdelphij 242170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 243171070Sdelphij 244170808Sdelphij /* The file is still active but all its names have been removed 245170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 246170808Sdelphij * it is about to die. */ 247170808Sdelphij if (node->tn_links < 1) 248170808Sdelphij return (ENOENT); 249170808Sdelphij 250170808Sdelphij /* If the file is marked append-only, deny write requests. */ 251170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 252170808Sdelphij error = EPERM; 253170808Sdelphij else { 254170808Sdelphij error = 0; 255171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 256170808Sdelphij } 257170808Sdelphij 258170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 259170808Sdelphij return error; 260170808Sdelphij} 261170808Sdelphij 262170808Sdelphij/* --------------------------------------------------------------------- */ 263170808Sdelphij 264171069Sdelphijstatic int 265170808Sdelphijtmpfs_close(struct vop_close_args *v) 266170808Sdelphij{ 267170808Sdelphij struct vnode *vp = v->a_vp; 268170808Sdelphij 269170808Sdelphij struct tmpfs_node *node; 270170808Sdelphij 271170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 272170808Sdelphij 273170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 274170808Sdelphij 275170808Sdelphij if (node->tn_links > 0) { 276170808Sdelphij /* Update node times. No need to do it if the node has 277170808Sdelphij * been deleted, because it will vanish after we return. */ 278170808Sdelphij tmpfs_update(vp); 279170808Sdelphij } 280170808Sdelphij 281170808Sdelphij return 0; 282170808Sdelphij} 283170808Sdelphij 284170808Sdelphij/* --------------------------------------------------------------------- */ 285170808Sdelphij 286170808Sdelphijint 287170808Sdelphijtmpfs_access(struct vop_access_args *v) 288170808Sdelphij{ 289170808Sdelphij struct vnode *vp = v->a_vp; 290170808Sdelphij int mode = v->a_mode; 291170808Sdelphij struct ucred *cred = v->a_cred; 292170808Sdelphij 293170808Sdelphij int error; 294170808Sdelphij struct tmpfs_node *node; 295170808Sdelphij 296170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 297170808Sdelphij 298170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 299170808Sdelphij 300170808Sdelphij switch (vp->v_type) { 301170808Sdelphij case VDIR: 302170808Sdelphij /* FALLTHROUGH */ 303170808Sdelphij case VLNK: 304170808Sdelphij /* FALLTHROUGH */ 305170808Sdelphij case VREG: 306170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 307170808Sdelphij error = EROFS; 308170808Sdelphij goto out; 309170808Sdelphij } 310170808Sdelphij break; 311170808Sdelphij 312170808Sdelphij case VBLK: 313170808Sdelphij /* FALLTHROUGH */ 314170808Sdelphij case VCHR: 315170808Sdelphij /* FALLTHROUGH */ 316170808Sdelphij case VSOCK: 317170808Sdelphij /* FALLTHROUGH */ 318170808Sdelphij case VFIFO: 319170808Sdelphij break; 320170808Sdelphij 321170808Sdelphij default: 322170808Sdelphij error = EINVAL; 323170808Sdelphij goto out; 324170808Sdelphij } 325170808Sdelphij 326170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 327170808Sdelphij error = EPERM; 328170808Sdelphij goto out; 329170808Sdelphij } 330170808Sdelphij 331170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 332170808Sdelphij node->tn_gid, mode, cred, NULL); 333170808Sdelphij 334170808Sdelphijout: 335170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 336170808Sdelphij 337170808Sdelphij return error; 338170808Sdelphij} 339170808Sdelphij 340170808Sdelphij/* --------------------------------------------------------------------- */ 341170808Sdelphij 342170808Sdelphijint 343170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 344170808Sdelphij{ 345170808Sdelphij struct vnode *vp = v->a_vp; 346170808Sdelphij struct vattr *vap = v->a_vap; 347170808Sdelphij 348170808Sdelphij struct tmpfs_node *node; 349170808Sdelphij 350170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 351170808Sdelphij 352170808Sdelphij VATTR_NULL(vap); 353170808Sdelphij 354170808Sdelphij tmpfs_update(vp); 355170808Sdelphij 356170808Sdelphij vap->va_type = vp->v_type; 357170808Sdelphij vap->va_mode = node->tn_mode; 358170808Sdelphij vap->va_nlink = node->tn_links; 359170808Sdelphij vap->va_uid = node->tn_uid; 360170808Sdelphij vap->va_gid = node->tn_gid; 361170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 362170808Sdelphij vap->va_fileid = node->tn_id; 363170808Sdelphij vap->va_size = node->tn_size; 364170808Sdelphij vap->va_blocksize = PAGE_SIZE; 365170808Sdelphij vap->va_atime = node->tn_atime; 366170808Sdelphij vap->va_mtime = node->tn_mtime; 367170808Sdelphij vap->va_ctime = node->tn_ctime; 368170808Sdelphij vap->va_birthtime = node->tn_birthtime; 369170808Sdelphij vap->va_gen = node->tn_gen; 370170808Sdelphij vap->va_flags = node->tn_flags; 371170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 372170808Sdelphij node->tn_rdev : VNOVAL; 373170808Sdelphij vap->va_bytes = round_page(node->tn_size); 374170808Sdelphij vap->va_filerev = VNOVAL; 375170808Sdelphij vap->va_vaflags = 0; 376170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 377170808Sdelphij 378170808Sdelphij return 0; 379170808Sdelphij} 380170808Sdelphij 381170808Sdelphij/* --------------------------------------------------------------------- */ 382170808Sdelphij 383170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 384170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 385170808Sdelphijint 386170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 387170808Sdelphij{ 388170808Sdelphij struct vnode *vp = v->a_vp; 389170808Sdelphij struct vattr *vap = v->a_vap; 390170808Sdelphij struct ucred *cred = v->a_cred; 391170808Sdelphij struct thread *l = v->a_td; 392170808Sdelphij 393170808Sdelphij int error; 394170808Sdelphij 395170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 396170808Sdelphij 397170808Sdelphij error = 0; 398170808Sdelphij 399170808Sdelphij /* Abort if any unsettable attribute is given. */ 400170808Sdelphij if (vap->va_type != VNON || 401170808Sdelphij vap->va_nlink != VNOVAL || 402170808Sdelphij vap->va_fsid != VNOVAL || 403170808Sdelphij vap->va_fileid != VNOVAL || 404170808Sdelphij vap->va_blocksize != VNOVAL || 405170808Sdelphij vap->va_gen != VNOVAL || 406170808Sdelphij vap->va_rdev != VNOVAL || 407170808Sdelphij vap->va_bytes != VNOVAL) 408170808Sdelphij error = EINVAL; 409170808Sdelphij 410170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 411170808Sdelphij error = tmpfs_chflags(vp, vap->va_flags, cred, l); 412170808Sdelphij 413170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 414170808Sdelphij error = tmpfs_chsize(vp, vap->va_size, cred, l); 415170808Sdelphij 416170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 417170808Sdelphij error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 418170808Sdelphij l); 419170808Sdelphij 420170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 421170808Sdelphij error = tmpfs_chmod(vp, vap->va_mode, cred, l); 422170808Sdelphij 423170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 424170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 425170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 426170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 427170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 428170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 429171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 430170808Sdelphij &vap->va_birthtime, vap->va_vaflags, cred, l); 431170808Sdelphij 432170808Sdelphij /* Update the node times. We give preference to the error codes 433170808Sdelphij * generated by this function rather than the ones that may arise 434170808Sdelphij * from tmpfs_update. */ 435170808Sdelphij tmpfs_update(vp); 436170808Sdelphij 437170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 438170808Sdelphij 439170808Sdelphij return error; 440170808Sdelphij} 441170808Sdelphij 442170808Sdelphij/* --------------------------------------------------------------------- */ 443171489Sdelphij 444170808Sdelphijstatic int 445171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 446170808Sdelphij{ 447171489Sdelphij vm_pindex_t idx; 448171489Sdelphij vm_page_t m; 449171489Sdelphij struct sf_buf *sf; 450171489Sdelphij off_t offset, addr; 451171489Sdelphij size_t tlen; 452171489Sdelphij caddr_t va; 453171489Sdelphij int error; 454170808Sdelphij 455171489Sdelphij addr = uio->uio_offset; 456171489Sdelphij idx = OFF_TO_IDX(addr); 457171489Sdelphij offset = addr & PAGE_MASK; 458171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 459170808Sdelphij 460171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 461171489Sdelphij goto nocache; 462170808Sdelphij 463171489Sdelphij VM_OBJECT_LOCK(vobj); 464171489Sdelphijlookupvpg: 465171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 466171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 467171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 468171489Sdelphij goto lookupvpg; 469171489Sdelphij vm_page_busy(m); 470171489Sdelphij VM_OBJECT_UNLOCK(vobj); 471170808Sdelphij sched_pin(); 472170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 473171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 474171489Sdelphij error = uiomove(va + offset, tlen, uio); 475170808Sdelphij sf_buf_free(sf); 476170808Sdelphij sched_unpin(); 477171489Sdelphij VM_OBJECT_LOCK(vobj); 478171489Sdelphij vm_page_wakeup(m); 479171489Sdelphij VM_OBJECT_UNLOCK(vobj); 480171489Sdelphij return (error); 481171489Sdelphij } 482171489Sdelphij VM_OBJECT_UNLOCK(vobj); 483171489Sdelphijnocache: 484171489Sdelphij VM_OBJECT_LOCK(tobj); 485171489Sdelphij vm_object_pip_add(tobj, 1); 486171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 487171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 488171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 489171489Sdelphij int behind, ahead; 490171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 491171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 492171489Sdelphij if (error != 0) { 493171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 494171489Sdelphij goto out; 495171489Sdelphij } 496171489Sdelphij } else 497170808Sdelphij vm_page_zero_invalid(m, TRUE); 498170808Sdelphij } 499171489Sdelphij VM_OBJECT_UNLOCK(tobj); 500171489Sdelphij sched_pin(); 501171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 502171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 503171489Sdelphij error = uiomove(va + offset, tlen, uio); 504171489Sdelphij sf_buf_free(sf); 505171489Sdelphij sched_unpin(); 506171489Sdelphij VM_OBJECT_LOCK(tobj); 507171308Sdelphijout: 508171489Sdelphij vm_page_lock_queues(); 509171489Sdelphij vm_page_unwire(m, 0); 510171489Sdelphij vm_page_activate(m); 511171489Sdelphij vm_page_unlock_queues(); 512171489Sdelphij vm_page_wakeup(m); 513171489Sdelphij vm_object_pip_subtract(tobj, 1); 514171489Sdelphij VM_OBJECT_UNLOCK(tobj); 515171489Sdelphij 516171489Sdelphij return (error); 517170808Sdelphij} 518170808Sdelphij 519171069Sdelphijstatic int 520170808Sdelphijtmpfs_read(struct vop_read_args *v) 521170808Sdelphij{ 522170808Sdelphij struct vnode *vp = v->a_vp; 523170808Sdelphij struct uio *uio = v->a_uio; 524170808Sdelphij 525170808Sdelphij struct tmpfs_node *node; 526170808Sdelphij vm_object_t uobj; 527171489Sdelphij size_t len; 528171489Sdelphij int resid; 529170808Sdelphij 530170808Sdelphij int error; 531170808Sdelphij 532170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 533170808Sdelphij 534170808Sdelphij if (vp->v_type != VREG) { 535170808Sdelphij error = EISDIR; 536170808Sdelphij goto out; 537170808Sdelphij } 538170808Sdelphij 539170808Sdelphij if (uio->uio_offset < 0) { 540170808Sdelphij error = EINVAL; 541170808Sdelphij goto out; 542170808Sdelphij } 543170808Sdelphij 544170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 545170808Sdelphij 546170808Sdelphij uobj = node->tn_reg.tn_aobj; 547171489Sdelphij while ((resid = uio->uio_resid) > 0) { 548171489Sdelphij error = 0; 549171489Sdelphij if (node->tn_size <= uio->uio_offset) 550171489Sdelphij break; 551171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 552171489Sdelphij if (len == 0) 553171489Sdelphij break; 554171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 555171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 556171489Sdelphij break; 557171489Sdelphij } 558170808Sdelphij 559170808Sdelphijout: 560170808Sdelphij 561170808Sdelphij return error; 562170808Sdelphij} 563170808Sdelphij 564170808Sdelphij/* --------------------------------------------------------------------- */ 565170808Sdelphij 566171069Sdelphijstatic int 567171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 568171489Sdelphij{ 569171489Sdelphij vm_pindex_t idx; 570171489Sdelphij vm_page_t vpg, tpg; 571171489Sdelphij struct sf_buf *sf; 572171489Sdelphij off_t offset, addr; 573171489Sdelphij size_t tlen; 574171489Sdelphij caddr_t va; 575171489Sdelphij int error; 576171489Sdelphij 577171489Sdelphij addr = uio->uio_offset; 578171489Sdelphij idx = OFF_TO_IDX(addr); 579171489Sdelphij offset = addr & PAGE_MASK; 580171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 581171489Sdelphij 582171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 583171489Sdelphij vpg = NULL; 584171489Sdelphij goto nocache; 585171489Sdelphij } 586171489Sdelphij 587171489Sdelphij VM_OBJECT_LOCK(vobj); 588171489Sdelphijlookupvpg: 589171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 590171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 591171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 592171489Sdelphij goto lookupvpg; 593171489Sdelphij vm_page_busy(vpg); 594171489Sdelphij vm_page_lock_queues(); 595171489Sdelphij vm_page_undirty(vpg); 596171489Sdelphij vm_page_unlock_queues(); 597171489Sdelphij VM_OBJECT_UNLOCK(vobj); 598171489Sdelphij sched_pin(); 599171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 600171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 601171489Sdelphij error = uiomove(va + offset, tlen, uio); 602171489Sdelphij sf_buf_free(sf); 603171489Sdelphij sched_unpin(); 604171489Sdelphij } else { 605171489Sdelphij VM_OBJECT_UNLOCK(vobj); 606171489Sdelphij vpg = NULL; 607171489Sdelphij } 608171489Sdelphijnocache: 609171489Sdelphij VM_OBJECT_LOCK(tobj); 610171489Sdelphij vm_object_pip_add(tobj, 1); 611171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 612171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 613171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 614171489Sdelphij int behind, ahead; 615171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 616171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 617171489Sdelphij if (error != 0) { 618171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 619171489Sdelphij goto out; 620171489Sdelphij } 621171489Sdelphij } else 622171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 623171489Sdelphij } 624171489Sdelphij VM_OBJECT_UNLOCK(tobj); 625171489Sdelphij if (vpg == NULL) { 626171489Sdelphij sched_pin(); 627171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 628171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 629171489Sdelphij error = uiomove(va + offset, tlen, uio); 630171489Sdelphij sf_buf_free(sf); 631171489Sdelphij sched_unpin(); 632171489Sdelphij } else { 633171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 634171489Sdelphij pmap_copy_page(vpg, tpg); 635171489Sdelphij } 636171489Sdelphij VM_OBJECT_LOCK(tobj); 637171489Sdelphijout: 638171489Sdelphij if (vobj != NULL) 639171489Sdelphij VM_OBJECT_LOCK(vobj); 640171489Sdelphij vm_page_lock_queues(); 641171489Sdelphij if (error == 0) { 642171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 643171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 644171489Sdelphij vm_page_dirty(tpg); 645171489Sdelphij } 646171489Sdelphij vm_page_unwire(tpg, 0); 647171489Sdelphij vm_page_activate(tpg); 648171489Sdelphij vm_page_unlock_queues(); 649171489Sdelphij vm_page_wakeup(tpg); 650171489Sdelphij if (vpg != NULL) 651171489Sdelphij vm_page_wakeup(vpg); 652171489Sdelphij if (vobj != NULL) 653171489Sdelphij VM_OBJECT_UNLOCK(vobj); 654171489Sdelphij vm_object_pip_subtract(tobj, 1); 655171489Sdelphij VM_OBJECT_UNLOCK(tobj); 656171489Sdelphij 657171489Sdelphij return (error); 658171489Sdelphij} 659171489Sdelphij 660171489Sdelphijstatic int 661170808Sdelphijtmpfs_write(struct vop_write_args *v) 662170808Sdelphij{ 663170808Sdelphij struct vnode *vp = v->a_vp; 664170808Sdelphij struct uio *uio = v->a_uio; 665170808Sdelphij int ioflag = v->a_ioflag; 666170808Sdelphij struct thread *td = uio->uio_td; 667170808Sdelphij 668170808Sdelphij boolean_t extended; 669171489Sdelphij int error = 0; 670170808Sdelphij off_t oldsize; 671170808Sdelphij struct tmpfs_node *node; 672170808Sdelphij vm_object_t uobj; 673171489Sdelphij size_t len; 674171489Sdelphij int resid; 675170808Sdelphij 676170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 677170808Sdelphij oldsize = node->tn_size; 678170808Sdelphij 679170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 680170808Sdelphij error = EINVAL; 681170808Sdelphij goto out; 682170808Sdelphij } 683170808Sdelphij 684170808Sdelphij if (uio->uio_resid == 0) { 685170808Sdelphij error = 0; 686170808Sdelphij goto out; 687170808Sdelphij } 688170808Sdelphij 689170808Sdelphij if (ioflag & IO_APPEND) 690170808Sdelphij uio->uio_offset = node->tn_size; 691171070Sdelphij 692171070Sdelphij if (uio->uio_offset + uio->uio_resid > 693170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 694170808Sdelphij return (EFBIG); 695170808Sdelphij 696170808Sdelphij if (vp->v_type == VREG && td != NULL) { 697170808Sdelphij PROC_LOCK(td->td_proc); 698170808Sdelphij if (uio->uio_offset + uio->uio_resid > 699170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 700170808Sdelphij psignal(td->td_proc, SIGXFSZ); 701170808Sdelphij PROC_UNLOCK(td->td_proc); 702170808Sdelphij return (EFBIG); 703170808Sdelphij } 704170808Sdelphij PROC_UNLOCK(td->td_proc); 705170808Sdelphij } 706170808Sdelphij 707170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 708170808Sdelphij if (extended) { 709170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 710170808Sdelphij if (error != 0) 711170808Sdelphij goto out; 712170808Sdelphij } 713170808Sdelphij 714170808Sdelphij uobj = node->tn_reg.tn_aobj; 715171489Sdelphij while ((resid = uio->uio_resid) > 0) { 716171489Sdelphij if (node->tn_size <= uio->uio_offset) 717171489Sdelphij break; 718171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 719171489Sdelphij if (len == 0) 720171489Sdelphij break; 721171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 722171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 723171489Sdelphij break; 724171489Sdelphij } 725170808Sdelphij 726170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 727170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 728170808Sdelphij 729170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 730170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 731170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 732170808Sdelphij } 733170808Sdelphij 734170808Sdelphij if (error != 0) 735170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 736170808Sdelphij 737170808Sdelphijout: 738170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 739170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 740170808Sdelphij 741170808Sdelphij return error; 742170808Sdelphij} 743170808Sdelphij 744170808Sdelphij/* --------------------------------------------------------------------- */ 745170808Sdelphij 746171069Sdelphijstatic int 747170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 748170808Sdelphij{ 749170808Sdelphij struct vnode *vp = v->a_vp; 750170808Sdelphij 751170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 752170808Sdelphij 753170808Sdelphij tmpfs_update(vp); 754170808Sdelphij 755170808Sdelphij return 0; 756170808Sdelphij} 757170808Sdelphij 758170808Sdelphij/* --------------------------------------------------------------------- */ 759170808Sdelphij 760171069Sdelphijstatic int 761170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 762170808Sdelphij{ 763170808Sdelphij struct vnode *dvp = v->a_dvp; 764170808Sdelphij struct vnode *vp = v->a_vp; 765170808Sdelphij 766170808Sdelphij int error; 767170808Sdelphij struct tmpfs_dirent *de; 768170808Sdelphij struct tmpfs_mount *tmp; 769170808Sdelphij struct tmpfs_node *dnode; 770170808Sdelphij struct tmpfs_node *node; 771170808Sdelphij 772170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 773170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 774170808Sdelphij 775170808Sdelphij if (vp->v_type == VDIR) { 776170808Sdelphij error = EISDIR; 777170808Sdelphij goto out; 778170808Sdelphij } 779170808Sdelphij 780170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 781170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 782170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 783170808Sdelphij de = node->tn_lookup_dirent; 784170808Sdelphij MPASS(de != NULL); 785170808Sdelphij 786170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 787170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 788170808Sdelphij (dnode->tn_flags & APPEND)) { 789170808Sdelphij error = EPERM; 790170808Sdelphij goto out; 791170808Sdelphij } 792170808Sdelphij 793170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 794170808Sdelphij * have to change the number of hard links of the directory. */ 795170808Sdelphij tmpfs_dir_detach(dvp, de); 796170808Sdelphij 797170808Sdelphij /* Free the directory entry we just deleted. Note that the node 798170808Sdelphij * referred by it will not be removed until the vnode is really 799170808Sdelphij * reclaimed. */ 800170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 801170808Sdelphij 802170808Sdelphij if (node->tn_links > 0) 803170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 804170808Sdelphij TMPFS_NODE_MODIFIED; 805170808Sdelphij error = 0; 806170808Sdelphij 807170808Sdelphijout: 808170808Sdelphij 809170808Sdelphij return error; 810170808Sdelphij} 811170808Sdelphij 812170808Sdelphij/* --------------------------------------------------------------------- */ 813170808Sdelphij 814171069Sdelphijstatic int 815170808Sdelphijtmpfs_link(struct vop_link_args *v) 816170808Sdelphij{ 817170808Sdelphij struct vnode *dvp = v->a_tdvp; 818170808Sdelphij struct vnode *vp = v->a_vp; 819170808Sdelphij struct componentname *cnp = v->a_cnp; 820170808Sdelphij 821170808Sdelphij int error; 822170808Sdelphij struct tmpfs_dirent *de; 823170808Sdelphij struct tmpfs_node *node; 824170808Sdelphij 825170808Sdelphij MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 826170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 827170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 828170808Sdelphij 829170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 830170808Sdelphij 831170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 832170808Sdelphij 833170808Sdelphij /* Hard links of directories are forbidden. */ 834170808Sdelphij if (vp->v_type == VDIR) { 835170808Sdelphij error = EPERM; 836170808Sdelphij goto out; 837170808Sdelphij } 838170808Sdelphij 839170808Sdelphij /* Cannot create cross-device links. */ 840170808Sdelphij if (dvp->v_mount != vp->v_mount) { 841170808Sdelphij error = EXDEV; 842170808Sdelphij goto out; 843170808Sdelphij } 844170808Sdelphij 845170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 846170808Sdelphij * by the system. */ 847170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 848170808Sdelphij if (node->tn_links == LINK_MAX) { 849170808Sdelphij error = EMLINK; 850170808Sdelphij goto out; 851170808Sdelphij } 852170808Sdelphij 853170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 854170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 855170808Sdelphij error = EPERM; 856170808Sdelphij goto out; 857170808Sdelphij } 858170808Sdelphij 859170808Sdelphij /* Allocate a new directory entry to represent the node. */ 860170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 861170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 862170808Sdelphij if (error != 0) 863170808Sdelphij goto out; 864170808Sdelphij 865170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 866170808Sdelphij tmpfs_dir_attach(dvp, de); 867170808Sdelphij 868170808Sdelphij /* vp link count has changed, so update node times. */ 869170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 870170808Sdelphij tmpfs_update(vp); 871170808Sdelphij 872170808Sdelphij error = 0; 873171070Sdelphij 874170808Sdelphijout: 875170808Sdelphij return error; 876170808Sdelphij} 877170808Sdelphij 878170808Sdelphij/* --------------------------------------------------------------------- */ 879170808Sdelphij 880171069Sdelphijstatic int 881170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 882170808Sdelphij{ 883170808Sdelphij struct vnode *fdvp = v->a_fdvp; 884170808Sdelphij struct vnode *fvp = v->a_fvp; 885170808Sdelphij struct componentname *fcnp = v->a_fcnp; 886170808Sdelphij struct vnode *tdvp = v->a_tdvp; 887170808Sdelphij struct vnode *tvp = v->a_tvp; 888170808Sdelphij struct componentname *tcnp = v->a_tcnp; 889170808Sdelphij struct tmpfs_node *tnode = 0; /* pacify gcc */ 890170808Sdelphij 891170808Sdelphij char *newname; 892170808Sdelphij int error; 893170808Sdelphij struct tmpfs_dirent *de; 894170808Sdelphij struct tmpfs_node *fdnode; 895170808Sdelphij struct tmpfs_node *fnode; 896170808Sdelphij struct tmpfs_node *tdnode; 897170808Sdelphij 898170808Sdelphij MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 899170808Sdelphij MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 900170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 901170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 902170808Sdelphij 903170808Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 904170808Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 905170808Sdelphij de = fnode->tn_lookup_dirent; 906170808Sdelphij 907170808Sdelphij /* Disallow cross-device renames. 908170808Sdelphij * XXX Why isn't this done by the caller? */ 909170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 910170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 911170808Sdelphij error = EXDEV; 912170808Sdelphij goto out; 913170808Sdelphij } 914170808Sdelphij 915170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 916170808Sdelphij 917170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 918170808Sdelphij if (fvp == tvp) { 919170808Sdelphij error = 0; 920170808Sdelphij goto out; 921170808Sdelphij } 922170808Sdelphij 923170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 924170808Sdelphij if (de == NULL) { 925170808Sdelphij MPASS(fvp->v_type == VDIR); 926170808Sdelphij error = EINVAL; 927170808Sdelphij goto out; 928170808Sdelphij } 929170808Sdelphij MPASS(de->td_node == fnode); 930170808Sdelphij 931171070Sdelphij /* If re-naming a directory to another preexisting directory 932170808Sdelphij * ensure that the target directory is empty so that its 933171070Sdelphij * removal causes no side effects. 934170808Sdelphij * Kern_rename gurantees the destination to be a directory 935170808Sdelphij * if the source is one. */ 936170808Sdelphij if (tvp != NULL) { 937170808Sdelphij tnode = VP_TO_TMPFS_NODE(tvp); 938171070Sdelphij 939170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 940170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 941170808Sdelphij error = EPERM; 942170808Sdelphij goto out; 943170808Sdelphij } 944170808Sdelphij 945171070Sdelphij if ((de->td_node->tn_type == VDIR) && (tnode->tn_size > 0)) { 946170808Sdelphij error = ENOTEMPTY; 947170808Sdelphij goto out; 948170808Sdelphij } 949170808Sdelphij } 950170808Sdelphij 951170808Sdelphij /* If we need to move the directory between entries, lock the 952170808Sdelphij * source so that we can safely operate on it. */ 953170808Sdelphij if (fdnode != tdnode) { 954170808Sdelphij error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 955170808Sdelphij if (error != 0) 956170808Sdelphij goto out; 957170808Sdelphij } 958170808Sdelphij 959170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 960170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 961170808Sdelphij error = EPERM; 962170808Sdelphij goto out_locked; 963170808Sdelphij } 964170808Sdelphij 965170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 966170808Sdelphij * has to be changed. */ 967170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 968170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 969171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 970170808Sdelphij } else 971170808Sdelphij newname = NULL; 972170808Sdelphij 973170808Sdelphij /* If the node is being moved to another directory, we have to do 974170808Sdelphij * the move. */ 975170808Sdelphij if (fdnode != tdnode) { 976170808Sdelphij /* In case we are moving a directory, we have to adjust its 977170808Sdelphij * parent to point to the new parent. */ 978170808Sdelphij if (de->td_node->tn_type == VDIR) { 979170808Sdelphij struct tmpfs_node *n; 980170808Sdelphij 981170808Sdelphij /* Ensure the target directory is not a child of the 982170808Sdelphij * directory being moved. Otherwise, we'd end up 983170808Sdelphij * with stale nodes. */ 984170808Sdelphij n = tdnode; 985170808Sdelphij while (n != n->tn_dir.tn_parent) { 986170808Sdelphij if (n == fnode) { 987170808Sdelphij error = EINVAL; 988170808Sdelphij if (newname != NULL) 989171087Sdelphij free(newname, M_TMPFSNAME); 990170808Sdelphij goto out_locked; 991170808Sdelphij } 992170808Sdelphij n = n->tn_dir.tn_parent; 993170808Sdelphij } 994170808Sdelphij 995170808Sdelphij /* Adjust the parent pointer. */ 996170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 997170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 998170808Sdelphij 999170808Sdelphij /* As a result of changing the target of the '..' 1000170808Sdelphij * entry, the link count of the source and target 1001170808Sdelphij * directories has to be adjusted. */ 1002170808Sdelphij fdnode->tn_links--; 1003170808Sdelphij tdnode->tn_links++; 1004170808Sdelphij } 1005170808Sdelphij 1006170808Sdelphij /* Do the move: just remove the entry from the source directory 1007170808Sdelphij * and insert it into the target one. */ 1008170808Sdelphij tmpfs_dir_detach(fdvp, de); 1009170808Sdelphij tmpfs_dir_attach(tdvp, de); 1010170808Sdelphij } 1011170808Sdelphij 1012170808Sdelphij /* If the name has changed, we need to make it effective by changing 1013170808Sdelphij * it in the directory entry. */ 1014170808Sdelphij if (newname != NULL) { 1015170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1016170808Sdelphij 1017171087Sdelphij free(de->td_name, M_TMPFSNAME); 1018170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1019170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1020170808Sdelphij de->td_name = newname; 1021170808Sdelphij 1022170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1023170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1024170808Sdelphij } 1025170808Sdelphij 1026170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1027170808Sdelphij * from the target directory. */ 1028170808Sdelphij if (tvp != NULL) { 1029170808Sdelphij /* Remove the old entry from the target directory. */ 1030170808Sdelphij de = tnode->tn_lookup_dirent; 1031170808Sdelphij tmpfs_dir_detach(tdvp, de); 1032170808Sdelphij 1033170808Sdelphij /* Free the directory entry we just deleted. Note that the 1034170808Sdelphij * node referred by it will not be removed until the vnode is 1035170808Sdelphij * really reclaimed. */ 1036170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1037170808Sdelphij } 1038170808Sdelphij 1039170808Sdelphij error = 0; 1040170808Sdelphij 1041170808Sdelphijout_locked: 1042170808Sdelphij if (fdnode != tdnode) 1043170808Sdelphij VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 1044170808Sdelphij 1045170808Sdelphijout: 1046170808Sdelphij /* Release target nodes. */ 1047170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1048170808Sdelphij * other code takes care of this... */ 1049170808Sdelphij if (tdvp == tvp) 1050170808Sdelphij vrele(tdvp); 1051170808Sdelphij else 1052170808Sdelphij vput(tdvp); 1053170808Sdelphij if (tvp != NULL) 1054170808Sdelphij vput(tvp); 1055170808Sdelphij 1056170808Sdelphij /* Release source nodes. */ 1057170808Sdelphij vrele(fdvp); 1058170808Sdelphij vrele(fvp); 1059170808Sdelphij 1060170808Sdelphij return error; 1061170808Sdelphij} 1062170808Sdelphij 1063170808Sdelphij/* --------------------------------------------------------------------- */ 1064170808Sdelphij 1065171069Sdelphijstatic int 1066170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1067170808Sdelphij{ 1068170808Sdelphij struct vnode *dvp = v->a_dvp; 1069170808Sdelphij struct vnode **vpp = v->a_vpp; 1070170808Sdelphij struct componentname *cnp = v->a_cnp; 1071170808Sdelphij struct vattr *vap = v->a_vap; 1072170808Sdelphij 1073170808Sdelphij MPASS(vap->va_type == VDIR); 1074170808Sdelphij 1075170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1076170808Sdelphij} 1077170808Sdelphij 1078170808Sdelphij/* --------------------------------------------------------------------- */ 1079170808Sdelphij 1080171069Sdelphijstatic int 1081170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1082170808Sdelphij{ 1083170808Sdelphij struct vnode *dvp = v->a_dvp; 1084170808Sdelphij struct vnode *vp = v->a_vp; 1085170808Sdelphij 1086170808Sdelphij int error; 1087170808Sdelphij struct tmpfs_dirent *de; 1088170808Sdelphij struct tmpfs_mount *tmp; 1089170808Sdelphij struct tmpfs_node *dnode; 1090170808Sdelphij struct tmpfs_node *node; 1091170808Sdelphij 1092170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 1093170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 1094170808Sdelphij 1095170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1096170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1097170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1098170808Sdelphij 1099171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1100171070Sdelphij * removed. */ 1101171070Sdelphij if (node->tn_size > 0) { 1102171070Sdelphij error = ENOTEMPTY; 1103171070Sdelphij goto out; 1104171070Sdelphij } 1105170808Sdelphij 1106170808Sdelphij if ((dnode->tn_flags & APPEND) 1107170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1108170808Sdelphij error = EPERM; 1109170808Sdelphij goto out; 1110170808Sdelphij } 1111170808Sdelphij 1112171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1113171070Sdelphij * We checked for that above so this is safe now. */ 1114170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1115170808Sdelphij 1116170808Sdelphij /* Get the directory entry associated with node (vp). This was 1117170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1118170808Sdelphij de = node->tn_lookup_dirent; 1119170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1120170808Sdelphij v->a_cnp->cn_nameptr, 1121170808Sdelphij v->a_cnp->cn_namelen)); 1122170808Sdelphij 1123170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1124170808Sdelphij if (dnode->tn_flags & APPEND 1125170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1126170808Sdelphij error = EPERM; 1127170808Sdelphij goto out; 1128170808Sdelphij } 1129170808Sdelphij 1130170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1131170808Sdelphij tmpfs_dir_detach(dvp, de); 1132170808Sdelphij 1133170808Sdelphij node->tn_links--; 1134170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1135170808Sdelphij TMPFS_NODE_MODIFIED; 1136170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1137170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1138170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1139170808Sdelphij 1140171070Sdelphij cache_purge(dvp); 1141170808Sdelphij cache_purge(vp); 1142170808Sdelphij 1143170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1144170808Sdelphij * referred by it will not be removed until the vnode is really 1145170808Sdelphij * reclaimed. */ 1146170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1147170808Sdelphij 1148170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1149170808Sdelphij * interested parties and clean it from the cache). */ 1150170808Sdelphij 1151170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1152170808Sdelphij tmpfs_update(dvp); 1153170808Sdelphij 1154170808Sdelphij error = 0; 1155170808Sdelphij 1156170808Sdelphijout: 1157170808Sdelphij return error; 1158170808Sdelphij} 1159170808Sdelphij 1160170808Sdelphij/* --------------------------------------------------------------------- */ 1161170808Sdelphij 1162171069Sdelphijstatic int 1163170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1164170808Sdelphij{ 1165170808Sdelphij struct vnode *dvp = v->a_dvp; 1166170808Sdelphij struct vnode **vpp = v->a_vpp; 1167170808Sdelphij struct componentname *cnp = v->a_cnp; 1168170808Sdelphij struct vattr *vap = v->a_vap; 1169170808Sdelphij char *target = v->a_target; 1170170808Sdelphij 1171170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1172170808Sdelphij MPASS(vap->va_type == VLNK); 1173170808Sdelphij#else 1174170808Sdelphij vap->va_type = VLNK; 1175170808Sdelphij#endif 1176170808Sdelphij 1177170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1178170808Sdelphij} 1179170808Sdelphij 1180170808Sdelphij/* --------------------------------------------------------------------- */ 1181170808Sdelphij 1182171069Sdelphijstatic int 1183170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1184170808Sdelphij{ 1185170808Sdelphij struct vnode *vp = v->a_vp; 1186170808Sdelphij struct uio *uio = v->a_uio; 1187170808Sdelphij int *eofflag = v->a_eofflag; 1188170808Sdelphij u_long **cookies = v->a_cookies; 1189170808Sdelphij int *ncookies = v->a_ncookies; 1190170808Sdelphij 1191170808Sdelphij int error; 1192170808Sdelphij off_t startoff; 1193170808Sdelphij off_t cnt; 1194170808Sdelphij struct tmpfs_node *node; 1195170808Sdelphij 1196170808Sdelphij /* This operation only makes sense on directory nodes. */ 1197170808Sdelphij if (vp->v_type != VDIR) { 1198170808Sdelphij error = ENOTDIR; 1199170808Sdelphij goto out; 1200170808Sdelphij } 1201170808Sdelphij 1202170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1203170808Sdelphij 1204170808Sdelphij startoff = uio->uio_offset; 1205170808Sdelphij 1206170808Sdelphij cnt = 0; 1207170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1208170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1209170808Sdelphij if (error == -1) { 1210170808Sdelphij error = 0; 1211170808Sdelphij goto outok; 1212170808Sdelphij } else if (error != 0) 1213170808Sdelphij goto outok; 1214170808Sdelphij cnt++; 1215170808Sdelphij } 1216170808Sdelphij 1217170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1218170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1219170808Sdelphij if (error == -1) { 1220170808Sdelphij error = 0; 1221170808Sdelphij goto outok; 1222170808Sdelphij } else if (error != 0) 1223170808Sdelphij goto outok; 1224170808Sdelphij cnt++; 1225170808Sdelphij } 1226170808Sdelphij 1227170808Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1228170808Sdelphij if (error == -1) 1229170808Sdelphij error = 0; 1230170808Sdelphij MPASS(error >= 0); 1231170808Sdelphij 1232170808Sdelphijoutok: 1233170808Sdelphij /* This label assumes that startoff has been 1234170808Sdelphij * initialized. If the compiler didn't spit out warnings, we'd 1235170808Sdelphij * simply make this one be 'out' and drop 'outok'. */ 1236170808Sdelphij 1237170808Sdelphij if (eofflag != NULL) 1238170808Sdelphij *eofflag = 1239170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1240170808Sdelphij 1241170808Sdelphij /* Update NFS-related variables. */ 1242170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1243170808Sdelphij off_t i; 1244170808Sdelphij off_t off = startoff; 1245170808Sdelphij struct tmpfs_dirent *de = NULL; 1246170808Sdelphij 1247170808Sdelphij *ncookies = cnt; 1248170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1249170808Sdelphij 1250170808Sdelphij for (i = 0; i < cnt; i++) { 1251170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1252170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1253170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1254170808Sdelphij } else { 1255170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1256170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1257170808Sdelphij } else if (de != NULL) { 1258170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1259170808Sdelphij } else { 1260170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1261170808Sdelphij off); 1262170808Sdelphij MPASS(de != NULL); 1263170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1264170808Sdelphij } 1265170808Sdelphij if (de == NULL) { 1266170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1267170808Sdelphij } else { 1268170808Sdelphij off = TMPFS_DIRCOOKIE(de); 1269170808Sdelphij } 1270170808Sdelphij } 1271170808Sdelphij 1272170808Sdelphij (*cookies)[i] = off; 1273170808Sdelphij } 1274170808Sdelphij MPASS(uio->uio_offset == off); 1275170808Sdelphij } 1276170808Sdelphij 1277170808Sdelphijout: 1278170808Sdelphij return error; 1279170808Sdelphij} 1280170808Sdelphij 1281170808Sdelphij/* --------------------------------------------------------------------- */ 1282170808Sdelphij 1283171069Sdelphijstatic int 1284170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1285170808Sdelphij{ 1286170808Sdelphij struct vnode *vp = v->a_vp; 1287170808Sdelphij struct uio *uio = v->a_uio; 1288170808Sdelphij 1289170808Sdelphij int error; 1290170808Sdelphij struct tmpfs_node *node; 1291170808Sdelphij 1292170808Sdelphij MPASS(uio->uio_offset == 0); 1293170808Sdelphij MPASS(vp->v_type == VLNK); 1294170808Sdelphij 1295170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1296170808Sdelphij 1297170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1298170808Sdelphij uio); 1299170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1300170808Sdelphij 1301170808Sdelphij return error; 1302170808Sdelphij} 1303170808Sdelphij 1304170808Sdelphij/* --------------------------------------------------------------------- */ 1305170808Sdelphij 1306171069Sdelphijstatic int 1307170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1308170808Sdelphij{ 1309170808Sdelphij struct vnode *vp = v->a_vp; 1310170808Sdelphij struct thread *l = v->a_td; 1311170808Sdelphij 1312170808Sdelphij struct tmpfs_node *node; 1313170808Sdelphij 1314170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 1315170808Sdelphij 1316170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1317170808Sdelphij 1318170808Sdelphij if (node->tn_links == 0) 1319170808Sdelphij vrecycle(vp, l); 1320170808Sdelphij 1321170808Sdelphij return 0; 1322170808Sdelphij} 1323170808Sdelphij 1324170808Sdelphij/* --------------------------------------------------------------------- */ 1325170808Sdelphij 1326170808Sdelphijint 1327170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1328170808Sdelphij{ 1329170808Sdelphij struct vnode *vp = v->a_vp; 1330170808Sdelphij 1331170808Sdelphij struct tmpfs_mount *tmp; 1332170808Sdelphij struct tmpfs_node *node; 1333170808Sdelphij 1334170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1335170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1336171070Sdelphij 1337170808Sdelphij vnode_destroy_vobject(vp); 1338170808Sdelphij cache_purge(vp); 1339170808Sdelphij tmpfs_free_vp(vp); 1340170808Sdelphij 1341170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1342170808Sdelphij * we must free its associated data structures (now that the vnode 1343170808Sdelphij * is being reclaimed). */ 1344170808Sdelphij if (node->tn_links == 0) 1345170808Sdelphij tmpfs_free_node(tmp, node); 1346170808Sdelphij 1347170808Sdelphij MPASS(vp->v_data == NULL); 1348170808Sdelphij return 0; 1349170808Sdelphij} 1350170808Sdelphij 1351170808Sdelphij/* --------------------------------------------------------------------- */ 1352170808Sdelphij 1353171069Sdelphijstatic int 1354170808Sdelphijtmpfs_print(struct vop_print_args *v) 1355170808Sdelphij{ 1356170808Sdelphij struct vnode *vp = v->a_vp; 1357170808Sdelphij 1358170808Sdelphij struct tmpfs_node *node; 1359170808Sdelphij 1360170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1361170808Sdelphij 1362170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1363170808Sdelphij node, node->tn_flags, node->tn_links); 1364170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1365170808Sdelphij ", status 0x%x\n", 1366170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1367170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1368170808Sdelphij 1369170808Sdelphij if (vp->v_type == VFIFO) 1370170808Sdelphij fifo_printinfo(vp); 1371170808Sdelphij 1372170808Sdelphij printf("\n"); 1373170808Sdelphij 1374170808Sdelphij return 0; 1375170808Sdelphij} 1376170808Sdelphij 1377170808Sdelphij/* --------------------------------------------------------------------- */ 1378170808Sdelphij 1379171069Sdelphijstatic int 1380170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1381170808Sdelphij{ 1382170808Sdelphij int name = v->a_name; 1383170808Sdelphij register_t *retval = v->a_retval; 1384170808Sdelphij 1385170808Sdelphij int error; 1386170808Sdelphij 1387170808Sdelphij error = 0; 1388170808Sdelphij 1389170808Sdelphij switch (name) { 1390170808Sdelphij case _PC_LINK_MAX: 1391170808Sdelphij *retval = LINK_MAX; 1392170808Sdelphij break; 1393170808Sdelphij 1394170808Sdelphij case _PC_NAME_MAX: 1395170808Sdelphij *retval = NAME_MAX; 1396170808Sdelphij break; 1397170808Sdelphij 1398170808Sdelphij case _PC_PATH_MAX: 1399170808Sdelphij *retval = PATH_MAX; 1400170808Sdelphij break; 1401170808Sdelphij 1402170808Sdelphij case _PC_PIPE_BUF: 1403170808Sdelphij *retval = PIPE_BUF; 1404170808Sdelphij break; 1405170808Sdelphij 1406170808Sdelphij case _PC_CHOWN_RESTRICTED: 1407170808Sdelphij *retval = 1; 1408170808Sdelphij break; 1409170808Sdelphij 1410170808Sdelphij case _PC_NO_TRUNC: 1411170808Sdelphij *retval = 1; 1412170808Sdelphij break; 1413170808Sdelphij 1414170808Sdelphij case _PC_SYNC_IO: 1415170808Sdelphij *retval = 1; 1416170808Sdelphij break; 1417170808Sdelphij 1418170808Sdelphij case _PC_FILESIZEBITS: 1419170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1420170808Sdelphij break; 1421170808Sdelphij 1422170808Sdelphij default: 1423170808Sdelphij error = EINVAL; 1424170808Sdelphij } 1425170808Sdelphij 1426170808Sdelphij return error; 1427170808Sdelphij} 1428170808Sdelphij 1429170808Sdelphij/* --------------------------------------------------------------------- */ 1430170808Sdelphij 1431171069Sdelphijstatic int 1432170808Sdelphijtmpfs_advlock(struct vop_advlock_args *v) 1433170808Sdelphij{ 1434170808Sdelphij struct vnode *vp = v->a_vp; 1435170808Sdelphij 1436170808Sdelphij struct tmpfs_node *node; 1437170808Sdelphij 1438170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1439170808Sdelphij 1440170808Sdelphij return lf_advlock(v, &node->tn_lockf, node->tn_size); 1441170808Sdelphij} 1442170808Sdelphij 1443170808Sdelphij/* --------------------------------------------------------------------- */ 1444170808Sdelphij 1445171069Sdelphijstatic int 1446170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1447170808Sdelphij{ 1448170808Sdelphij struct tmpfs_fid *tfhp; 1449170808Sdelphij struct tmpfs_node *node; 1450170808Sdelphij 1451170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1452170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1453170808Sdelphij 1454170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1455170808Sdelphij tfhp->tf_id = node->tn_id; 1456170808Sdelphij tfhp->tf_gen = node->tn_gen; 1457171070Sdelphij 1458170808Sdelphij return (0); 1459170808Sdelphij} 1460171069Sdelphij 1461171069Sdelphij/* --------------------------------------------------------------------- */ 1462171069Sdelphij 1463171069Sdelphij/* 1464171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1465171069Sdelphij */ 1466171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1467171069Sdelphij .vop_default = &default_vnodeops, 1468171069Sdelphij .vop_lookup = vfs_cache_lookup, 1469171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1470171069Sdelphij .vop_create = tmpfs_create, 1471171069Sdelphij .vop_mknod = tmpfs_mknod, 1472171069Sdelphij .vop_open = tmpfs_open, 1473171069Sdelphij .vop_close = tmpfs_close, 1474171069Sdelphij .vop_access = tmpfs_access, 1475171069Sdelphij .vop_getattr = tmpfs_getattr, 1476171069Sdelphij .vop_setattr = tmpfs_setattr, 1477171069Sdelphij .vop_read = tmpfs_read, 1478171069Sdelphij .vop_write = tmpfs_write, 1479171069Sdelphij .vop_fsync = tmpfs_fsync, 1480171069Sdelphij .vop_remove = tmpfs_remove, 1481171069Sdelphij .vop_link = tmpfs_link, 1482171069Sdelphij .vop_rename = tmpfs_rename, 1483171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1484171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1485171069Sdelphij .vop_symlink = tmpfs_symlink, 1486171069Sdelphij .vop_readdir = tmpfs_readdir, 1487171069Sdelphij .vop_readlink = tmpfs_readlink, 1488171069Sdelphij .vop_inactive = tmpfs_inactive, 1489171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1490171069Sdelphij .vop_print = tmpfs_print, 1491171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1492171069Sdelphij .vop_advlock = tmpfs_advlock, 1493171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1494171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1495171069Sdelphij}; 1496171069Sdelphij 1497