tmpfs_vnops.c revision 171802
1171802Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2170808Sdelphij 3170808Sdelphij/* 4171802Sdelphij * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 3. All advertising materials mentioning features or use of this software 20170808Sdelphij * must display the following acknowledgement: 21170808Sdelphij * This product includes software developed by the NetBSD 22170808Sdelphij * Foundation, Inc. and its contributors. 23170808Sdelphij * 4. Neither the name of The NetBSD Foundation nor the names of its 24170808Sdelphij * contributors may be used to endorse or promote products derived 25170808Sdelphij * from this software without specific prior written permission. 26170808Sdelphij * 27170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 38170808Sdelphij */ 39170808Sdelphij 40170808Sdelphij/* 41170808Sdelphij * tmpfs vnode interface. 42170808Sdelphij */ 43170808Sdelphij#include <sys/cdefs.h> 44170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 171802 2007-08-10 11:00:30Z 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) { 98171799Sdelphij int ltype = 0; 99171799Sdelphij 100171799Sdelphij ltype = VOP_ISLOCKED(dvp, td); 101171802Sdelphij vhold(dvp); 102170808Sdelphij VOP_UNLOCK(dvp, 0, td); 103170808Sdelphij /* Allocate a new vnode on the matching entry. */ 104171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 105171799Sdelphij cnp->cn_lkflags, vpp, td); 106170808Sdelphij 107171799Sdelphij vn_lock(dvp, ltype | LK_RETRY, td); 108171802Sdelphij vdrop(dvp); 109170808Sdelphij 110170808Sdelphij dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 111170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 112170808Sdelphij VREF(dvp); 113170808Sdelphij *vpp = dvp; 114170808Sdelphij dnode->tn_lookup_dirent = NULL; 115170808Sdelphij error = 0; 116170808Sdelphij } else { 117170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 118170808Sdelphij if (de == NULL) { 119170808Sdelphij /* The entry was not found in the directory. 120170808Sdelphij * This is OK if we are creating or renaming an 121170808Sdelphij * entry and are working on the last component of 122170808Sdelphij * the path name. */ 123170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 124170808Sdelphij (cnp->cn_nameiop == CREATE || \ 125170808Sdelphij cnp->cn_nameiop == RENAME)) { 126170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 127170808Sdelphij cnp->cn_thread); 128170808Sdelphij if (error != 0) 129170808Sdelphij goto out; 130170808Sdelphij 131170808Sdelphij /* Keep the component name in the buffer for 132170808Sdelphij * future uses. */ 133170808Sdelphij cnp->cn_flags |= SAVENAME; 134170808Sdelphij 135170808Sdelphij error = EJUSTRETURN; 136170808Sdelphij } else 137170808Sdelphij error = ENOENT; 138170808Sdelphij } else { 139170808Sdelphij struct tmpfs_node *tnode; 140170808Sdelphij 141170808Sdelphij /* The entry was found, so get its associated 142170808Sdelphij * tmpfs_node. */ 143170808Sdelphij tnode = de->td_node; 144170808Sdelphij 145170808Sdelphij /* If we are not at the last path component and 146170808Sdelphij * found a non-directory or non-link entry (which 147170808Sdelphij * may itself be pointing to a directory), raise 148170808Sdelphij * an error. */ 149170808Sdelphij if ((tnode->tn_type != VDIR && 150170808Sdelphij tnode->tn_type != VLNK) && 151170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 152170808Sdelphij error = ENOTDIR; 153170808Sdelphij goto out; 154170808Sdelphij } 155170808Sdelphij 156170808Sdelphij /* If we are deleting or renaming the entry, keep 157170808Sdelphij * track of its tmpfs_dirent so that it can be 158170808Sdelphij * easily deleted later. */ 159170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 160170808Sdelphij (cnp->cn_nameiop == DELETE || 161170808Sdelphij cnp->cn_nameiop == RENAME)) { 162170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 163170808Sdelphij cnp->cn_thread); 164170808Sdelphij if (error != 0) 165170808Sdelphij goto out; 166171070Sdelphij 167170808Sdelphij /* Allocate a new vnode on the matching entry. */ 168171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 169171799Sdelphij cnp->cn_lkflags, vpp, td); 170170808Sdelphij if (error != 0) 171170808Sdelphij goto out; 172170808Sdelphij 173170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 174170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 175170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 176170808Sdelphij error = EPERM; 177170808Sdelphij vput(*vpp); 178170808Sdelphij *vpp = NULL; 179170808Sdelphij goto out; 180171070Sdelphij } 181170808Sdelphij tnode->tn_lookup_dirent = de; 182170808Sdelphij cnp->cn_flags |= SAVENAME; 183171799Sdelphij } else { 184171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 185171799Sdelphij cnp->cn_lkflags, vpp, td); 186170808Sdelphij } 187170808Sdelphij } 188170808Sdelphij } 189170808Sdelphij 190170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 191170808Sdelphij * request was for creation, as it does not improve timings on 192170808Sdelphij * emprical tests. */ 193170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 194170808Sdelphij cache_enter(dvp, *vpp, cnp); 195170808Sdelphij 196170808Sdelphijout: 197170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 198170808Sdelphij * locked. */ 199170808Sdelphij MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 200170808Sdelphij 201170808Sdelphij return error; 202170808Sdelphij} 203170808Sdelphij 204170808Sdelphij/* --------------------------------------------------------------------- */ 205170808Sdelphij 206171069Sdelphijstatic int 207170808Sdelphijtmpfs_create(struct vop_create_args *v) 208170808Sdelphij{ 209170808Sdelphij struct vnode *dvp = v->a_dvp; 210170808Sdelphij struct vnode **vpp = v->a_vpp; 211170808Sdelphij struct componentname *cnp = v->a_cnp; 212170808Sdelphij struct vattr *vap = v->a_vap; 213170808Sdelphij 214170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 215170808Sdelphij 216170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 217170808Sdelphij} 218170808Sdelphij/* --------------------------------------------------------------------- */ 219170808Sdelphij 220171069Sdelphijstatic int 221170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 222170808Sdelphij{ 223170808Sdelphij struct vnode *dvp = v->a_dvp; 224170808Sdelphij struct vnode **vpp = v->a_vpp; 225170808Sdelphij struct componentname *cnp = v->a_cnp; 226170808Sdelphij struct vattr *vap = v->a_vap; 227170808Sdelphij 228170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 229170808Sdelphij vap->va_type != VFIFO) 230170808Sdelphij return EINVAL; 231170808Sdelphij 232170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 233170808Sdelphij} 234170808Sdelphij 235170808Sdelphij/* --------------------------------------------------------------------- */ 236170808Sdelphij 237171069Sdelphijstatic int 238170808Sdelphijtmpfs_open(struct vop_open_args *v) 239170808Sdelphij{ 240170808Sdelphij struct vnode *vp = v->a_vp; 241170808Sdelphij int mode = v->a_mode; 242170808Sdelphij 243170808Sdelphij int error; 244170808Sdelphij struct tmpfs_node *node; 245170808Sdelphij 246170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 247170808Sdelphij 248170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 249171070Sdelphij 250170808Sdelphij /* The file is still active but all its names have been removed 251170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 252170808Sdelphij * it is about to die. */ 253170808Sdelphij if (node->tn_links < 1) 254170808Sdelphij return (ENOENT); 255170808Sdelphij 256170808Sdelphij /* If the file is marked append-only, deny write requests. */ 257170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 258170808Sdelphij error = EPERM; 259170808Sdelphij else { 260170808Sdelphij error = 0; 261171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 262170808Sdelphij } 263170808Sdelphij 264170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 265170808Sdelphij return error; 266170808Sdelphij} 267170808Sdelphij 268170808Sdelphij/* --------------------------------------------------------------------- */ 269170808Sdelphij 270171069Sdelphijstatic int 271170808Sdelphijtmpfs_close(struct vop_close_args *v) 272170808Sdelphij{ 273170808Sdelphij struct vnode *vp = v->a_vp; 274170808Sdelphij 275170808Sdelphij struct tmpfs_node *node; 276170808Sdelphij 277170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 278170808Sdelphij 279170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 280170808Sdelphij 281170808Sdelphij if (node->tn_links > 0) { 282170808Sdelphij /* Update node times. No need to do it if the node has 283170808Sdelphij * been deleted, because it will vanish after we return. */ 284170808Sdelphij tmpfs_update(vp); 285170808Sdelphij } 286170808Sdelphij 287170808Sdelphij return 0; 288170808Sdelphij} 289170808Sdelphij 290170808Sdelphij/* --------------------------------------------------------------------- */ 291170808Sdelphij 292170808Sdelphijint 293170808Sdelphijtmpfs_access(struct vop_access_args *v) 294170808Sdelphij{ 295170808Sdelphij struct vnode *vp = v->a_vp; 296170808Sdelphij int mode = v->a_mode; 297170808Sdelphij struct ucred *cred = v->a_cred; 298170808Sdelphij 299170808Sdelphij int error; 300170808Sdelphij struct tmpfs_node *node; 301170808Sdelphij 302170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 303170808Sdelphij 304170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 305170808Sdelphij 306170808Sdelphij switch (vp->v_type) { 307170808Sdelphij case VDIR: 308170808Sdelphij /* FALLTHROUGH */ 309170808Sdelphij case VLNK: 310170808Sdelphij /* FALLTHROUGH */ 311170808Sdelphij case VREG: 312170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 313170808Sdelphij error = EROFS; 314170808Sdelphij goto out; 315170808Sdelphij } 316170808Sdelphij break; 317170808Sdelphij 318170808Sdelphij case VBLK: 319170808Sdelphij /* FALLTHROUGH */ 320170808Sdelphij case VCHR: 321170808Sdelphij /* FALLTHROUGH */ 322170808Sdelphij case VSOCK: 323170808Sdelphij /* FALLTHROUGH */ 324170808Sdelphij case VFIFO: 325170808Sdelphij break; 326170808Sdelphij 327170808Sdelphij default: 328170808Sdelphij error = EINVAL; 329170808Sdelphij goto out; 330170808Sdelphij } 331170808Sdelphij 332170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 333170808Sdelphij error = EPERM; 334170808Sdelphij goto out; 335170808Sdelphij } 336170808Sdelphij 337170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 338170808Sdelphij node->tn_gid, mode, cred, NULL); 339170808Sdelphij 340170808Sdelphijout: 341170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 342170808Sdelphij 343170808Sdelphij return error; 344170808Sdelphij} 345170808Sdelphij 346170808Sdelphij/* --------------------------------------------------------------------- */ 347170808Sdelphij 348170808Sdelphijint 349170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 350170808Sdelphij{ 351170808Sdelphij struct vnode *vp = v->a_vp; 352170808Sdelphij struct vattr *vap = v->a_vap; 353170808Sdelphij 354170808Sdelphij struct tmpfs_node *node; 355170808Sdelphij 356170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 357170808Sdelphij 358170808Sdelphij VATTR_NULL(vap); 359170808Sdelphij 360170808Sdelphij tmpfs_update(vp); 361170808Sdelphij 362170808Sdelphij vap->va_type = vp->v_type; 363170808Sdelphij vap->va_mode = node->tn_mode; 364170808Sdelphij vap->va_nlink = node->tn_links; 365170808Sdelphij vap->va_uid = node->tn_uid; 366170808Sdelphij vap->va_gid = node->tn_gid; 367170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 368170808Sdelphij vap->va_fileid = node->tn_id; 369170808Sdelphij vap->va_size = node->tn_size; 370170808Sdelphij vap->va_blocksize = PAGE_SIZE; 371170808Sdelphij vap->va_atime = node->tn_atime; 372170808Sdelphij vap->va_mtime = node->tn_mtime; 373170808Sdelphij vap->va_ctime = node->tn_ctime; 374170808Sdelphij vap->va_birthtime = node->tn_birthtime; 375170808Sdelphij vap->va_gen = node->tn_gen; 376170808Sdelphij vap->va_flags = node->tn_flags; 377170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 378170808Sdelphij node->tn_rdev : VNOVAL; 379170808Sdelphij vap->va_bytes = round_page(node->tn_size); 380170808Sdelphij vap->va_filerev = VNOVAL; 381170808Sdelphij vap->va_vaflags = 0; 382170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 383170808Sdelphij 384170808Sdelphij return 0; 385170808Sdelphij} 386170808Sdelphij 387170808Sdelphij/* --------------------------------------------------------------------- */ 388170808Sdelphij 389170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 390170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 391170808Sdelphijint 392170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 393170808Sdelphij{ 394170808Sdelphij struct vnode *vp = v->a_vp; 395170808Sdelphij struct vattr *vap = v->a_vap; 396170808Sdelphij struct ucred *cred = v->a_cred; 397170808Sdelphij struct thread *l = v->a_td; 398170808Sdelphij 399170808Sdelphij int error; 400170808Sdelphij 401170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 402170808Sdelphij 403170808Sdelphij error = 0; 404170808Sdelphij 405170808Sdelphij /* Abort if any unsettable attribute is given. */ 406170808Sdelphij if (vap->va_type != VNON || 407170808Sdelphij vap->va_nlink != VNOVAL || 408170808Sdelphij vap->va_fsid != VNOVAL || 409170808Sdelphij vap->va_fileid != VNOVAL || 410170808Sdelphij vap->va_blocksize != VNOVAL || 411170808Sdelphij vap->va_gen != VNOVAL || 412170808Sdelphij vap->va_rdev != VNOVAL || 413170808Sdelphij vap->va_bytes != VNOVAL) 414170808Sdelphij error = EINVAL; 415170808Sdelphij 416170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 417170808Sdelphij error = tmpfs_chflags(vp, vap->va_flags, cred, l); 418170808Sdelphij 419170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 420170808Sdelphij error = tmpfs_chsize(vp, vap->va_size, cred, l); 421170808Sdelphij 422170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 423170808Sdelphij error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 424170808Sdelphij l); 425170808Sdelphij 426170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 427170808Sdelphij error = tmpfs_chmod(vp, vap->va_mode, cred, l); 428170808Sdelphij 429170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 430170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 431170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 432170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 433170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 434170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 435171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 436170808Sdelphij &vap->va_birthtime, vap->va_vaflags, cred, l); 437170808Sdelphij 438170808Sdelphij /* Update the node times. We give preference to the error codes 439170808Sdelphij * generated by this function rather than the ones that may arise 440170808Sdelphij * from tmpfs_update. */ 441170808Sdelphij tmpfs_update(vp); 442170808Sdelphij 443170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 444170808Sdelphij 445170808Sdelphij return error; 446170808Sdelphij} 447170808Sdelphij 448170808Sdelphij/* --------------------------------------------------------------------- */ 449171489Sdelphij 450170808Sdelphijstatic int 451171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 452170808Sdelphij{ 453171489Sdelphij vm_pindex_t idx; 454171489Sdelphij vm_page_t m; 455171489Sdelphij struct sf_buf *sf; 456171489Sdelphij off_t offset, addr; 457171489Sdelphij size_t tlen; 458171489Sdelphij caddr_t va; 459171489Sdelphij int error; 460170808Sdelphij 461171489Sdelphij addr = uio->uio_offset; 462171489Sdelphij idx = OFF_TO_IDX(addr); 463171489Sdelphij offset = addr & PAGE_MASK; 464171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 465170808Sdelphij 466171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 467171489Sdelphij goto nocache; 468170808Sdelphij 469171489Sdelphij VM_OBJECT_LOCK(vobj); 470171489Sdelphijlookupvpg: 471171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 472171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 473171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 474171489Sdelphij goto lookupvpg; 475171489Sdelphij vm_page_busy(m); 476171489Sdelphij VM_OBJECT_UNLOCK(vobj); 477170808Sdelphij sched_pin(); 478170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 479171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 480171489Sdelphij error = uiomove(va + offset, tlen, uio); 481170808Sdelphij sf_buf_free(sf); 482170808Sdelphij sched_unpin(); 483171489Sdelphij VM_OBJECT_LOCK(vobj); 484171489Sdelphij vm_page_wakeup(m); 485171489Sdelphij VM_OBJECT_UNLOCK(vobj); 486171489Sdelphij return (error); 487171799Sdelphij } 488171489Sdelphij VM_OBJECT_UNLOCK(vobj); 489171489Sdelphijnocache: 490171489Sdelphij VM_OBJECT_LOCK(tobj); 491171489Sdelphij vm_object_pip_add(tobj, 1); 492171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 493171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 494171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 495171489Sdelphij int behind, ahead; 496171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 497171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 498171489Sdelphij if (error != 0) { 499171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 500171489Sdelphij goto out; 501171489Sdelphij } 502171489Sdelphij } else 503170808Sdelphij vm_page_zero_invalid(m, TRUE); 504170808Sdelphij } 505171489Sdelphij VM_OBJECT_UNLOCK(tobj); 506171489Sdelphij sched_pin(); 507171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 508171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 509171489Sdelphij error = uiomove(va + offset, tlen, uio); 510171489Sdelphij sf_buf_free(sf); 511171489Sdelphij sched_unpin(); 512171489Sdelphij VM_OBJECT_LOCK(tobj); 513171308Sdelphijout: 514171489Sdelphij vm_page_lock_queues(); 515171489Sdelphij vm_page_unwire(m, 0); 516171489Sdelphij vm_page_activate(m); 517171489Sdelphij vm_page_unlock_queues(); 518171489Sdelphij vm_page_wakeup(m); 519171489Sdelphij vm_object_pip_subtract(tobj, 1); 520171489Sdelphij VM_OBJECT_UNLOCK(tobj); 521171489Sdelphij 522171489Sdelphij return (error); 523170808Sdelphij} 524170808Sdelphij 525171069Sdelphijstatic int 526170808Sdelphijtmpfs_read(struct vop_read_args *v) 527170808Sdelphij{ 528170808Sdelphij struct vnode *vp = v->a_vp; 529170808Sdelphij struct uio *uio = v->a_uio; 530170808Sdelphij 531170808Sdelphij struct tmpfs_node *node; 532170808Sdelphij vm_object_t uobj; 533171489Sdelphij size_t len; 534171489Sdelphij int resid; 535170808Sdelphij 536170808Sdelphij int error; 537170808Sdelphij 538170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 539170808Sdelphij 540170808Sdelphij if (vp->v_type != VREG) { 541170808Sdelphij error = EISDIR; 542170808Sdelphij goto out; 543170808Sdelphij } 544170808Sdelphij 545170808Sdelphij if (uio->uio_offset < 0) { 546170808Sdelphij error = EINVAL; 547170808Sdelphij goto out; 548170808Sdelphij } 549170808Sdelphij 550170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 551170808Sdelphij 552170808Sdelphij uobj = node->tn_reg.tn_aobj; 553171489Sdelphij while ((resid = uio->uio_resid) > 0) { 554171489Sdelphij error = 0; 555171489Sdelphij if (node->tn_size <= uio->uio_offset) 556171489Sdelphij break; 557171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 558171489Sdelphij if (len == 0) 559171489Sdelphij break; 560171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 561171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 562171489Sdelphij break; 563171489Sdelphij } 564170808Sdelphij 565170808Sdelphijout: 566170808Sdelphij 567170808Sdelphij return error; 568170808Sdelphij} 569170808Sdelphij 570170808Sdelphij/* --------------------------------------------------------------------- */ 571170808Sdelphij 572171069Sdelphijstatic int 573171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 574171489Sdelphij{ 575171489Sdelphij vm_pindex_t idx; 576171489Sdelphij vm_page_t vpg, tpg; 577171489Sdelphij struct sf_buf *sf; 578171489Sdelphij off_t offset, addr; 579171489Sdelphij size_t tlen; 580171489Sdelphij caddr_t va; 581171489Sdelphij int error; 582171489Sdelphij 583171489Sdelphij addr = uio->uio_offset; 584171489Sdelphij idx = OFF_TO_IDX(addr); 585171489Sdelphij offset = addr & PAGE_MASK; 586171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 587171489Sdelphij 588171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 589171489Sdelphij vpg = NULL; 590171489Sdelphij goto nocache; 591171489Sdelphij } 592171489Sdelphij 593171489Sdelphij VM_OBJECT_LOCK(vobj); 594171489Sdelphijlookupvpg: 595171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 596171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 597171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 598171489Sdelphij goto lookupvpg; 599171489Sdelphij vm_page_busy(vpg); 600171489Sdelphij vm_page_lock_queues(); 601171489Sdelphij vm_page_undirty(vpg); 602171489Sdelphij vm_page_unlock_queues(); 603171489Sdelphij VM_OBJECT_UNLOCK(vobj); 604171489Sdelphij sched_pin(); 605171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 606171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 607171489Sdelphij error = uiomove(va + offset, tlen, uio); 608171489Sdelphij sf_buf_free(sf); 609171489Sdelphij sched_unpin(); 610171489Sdelphij } else { 611171489Sdelphij VM_OBJECT_UNLOCK(vobj); 612171489Sdelphij vpg = NULL; 613171489Sdelphij } 614171489Sdelphijnocache: 615171489Sdelphij VM_OBJECT_LOCK(tobj); 616171489Sdelphij vm_object_pip_add(tobj, 1); 617171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 618171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 619171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 620171489Sdelphij int behind, ahead; 621171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 622171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 623171489Sdelphij if (error != 0) { 624171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 625171489Sdelphij goto out; 626171489Sdelphij } 627171489Sdelphij } else 628171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 629171489Sdelphij } 630171489Sdelphij VM_OBJECT_UNLOCK(tobj); 631171489Sdelphij if (vpg == NULL) { 632171489Sdelphij sched_pin(); 633171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 634171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 635171489Sdelphij error = uiomove(va + offset, tlen, uio); 636171489Sdelphij sf_buf_free(sf); 637171489Sdelphij sched_unpin(); 638171489Sdelphij } else { 639171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 640171489Sdelphij pmap_copy_page(vpg, tpg); 641171489Sdelphij } 642171489Sdelphij VM_OBJECT_LOCK(tobj); 643171489Sdelphijout: 644171489Sdelphij if (vobj != NULL) 645171489Sdelphij VM_OBJECT_LOCK(vobj); 646171489Sdelphij vm_page_lock_queues(); 647171489Sdelphij if (error == 0) { 648171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 649171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 650171489Sdelphij vm_page_dirty(tpg); 651171489Sdelphij } 652171489Sdelphij vm_page_unwire(tpg, 0); 653171489Sdelphij vm_page_activate(tpg); 654171489Sdelphij vm_page_unlock_queues(); 655171489Sdelphij vm_page_wakeup(tpg); 656171489Sdelphij if (vpg != NULL) 657171489Sdelphij vm_page_wakeup(vpg); 658171489Sdelphij if (vobj != NULL) 659171489Sdelphij VM_OBJECT_UNLOCK(vobj); 660171489Sdelphij vm_object_pip_subtract(tobj, 1); 661171489Sdelphij VM_OBJECT_UNLOCK(tobj); 662171489Sdelphij 663171489Sdelphij return (error); 664171489Sdelphij} 665171489Sdelphij 666171489Sdelphijstatic int 667170808Sdelphijtmpfs_write(struct vop_write_args *v) 668170808Sdelphij{ 669170808Sdelphij struct vnode *vp = v->a_vp; 670170808Sdelphij struct uio *uio = v->a_uio; 671170808Sdelphij int ioflag = v->a_ioflag; 672170808Sdelphij struct thread *td = uio->uio_td; 673170808Sdelphij 674170808Sdelphij boolean_t extended; 675171489Sdelphij int error = 0; 676170808Sdelphij off_t oldsize; 677170808Sdelphij struct tmpfs_node *node; 678170808Sdelphij vm_object_t uobj; 679171489Sdelphij size_t len; 680171489Sdelphij int resid; 681170808Sdelphij 682170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 683170808Sdelphij oldsize = node->tn_size; 684170808Sdelphij 685170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 686170808Sdelphij error = EINVAL; 687170808Sdelphij goto out; 688170808Sdelphij } 689170808Sdelphij 690170808Sdelphij if (uio->uio_resid == 0) { 691170808Sdelphij error = 0; 692170808Sdelphij goto out; 693170808Sdelphij } 694170808Sdelphij 695170808Sdelphij if (ioflag & IO_APPEND) 696170808Sdelphij uio->uio_offset = node->tn_size; 697171070Sdelphij 698171070Sdelphij if (uio->uio_offset + uio->uio_resid > 699170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 700170808Sdelphij return (EFBIG); 701170808Sdelphij 702170808Sdelphij if (vp->v_type == VREG && td != NULL) { 703170808Sdelphij PROC_LOCK(td->td_proc); 704170808Sdelphij if (uio->uio_offset + uio->uio_resid > 705170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 706170808Sdelphij psignal(td->td_proc, SIGXFSZ); 707170808Sdelphij PROC_UNLOCK(td->td_proc); 708170808Sdelphij return (EFBIG); 709170808Sdelphij } 710170808Sdelphij PROC_UNLOCK(td->td_proc); 711170808Sdelphij } 712170808Sdelphij 713170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 714170808Sdelphij if (extended) { 715170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 716170808Sdelphij if (error != 0) 717170808Sdelphij goto out; 718170808Sdelphij } 719170808Sdelphij 720170808Sdelphij uobj = node->tn_reg.tn_aobj; 721171489Sdelphij while ((resid = uio->uio_resid) > 0) { 722171489Sdelphij if (node->tn_size <= uio->uio_offset) 723171489Sdelphij break; 724171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 725171489Sdelphij if (len == 0) 726171489Sdelphij break; 727171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 728171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 729171489Sdelphij break; 730171489Sdelphij } 731170808Sdelphij 732170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 733170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 734170808Sdelphij 735170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 736170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 737170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 738170808Sdelphij } 739170808Sdelphij 740170808Sdelphij if (error != 0) 741170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 742170808Sdelphij 743170808Sdelphijout: 744170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 745170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 746170808Sdelphij 747170808Sdelphij return error; 748170808Sdelphij} 749170808Sdelphij 750170808Sdelphij/* --------------------------------------------------------------------- */ 751170808Sdelphij 752171069Sdelphijstatic int 753170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 754170808Sdelphij{ 755170808Sdelphij struct vnode *vp = v->a_vp; 756170808Sdelphij 757170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 758170808Sdelphij 759170808Sdelphij tmpfs_update(vp); 760170808Sdelphij 761170808Sdelphij return 0; 762170808Sdelphij} 763170808Sdelphij 764170808Sdelphij/* --------------------------------------------------------------------- */ 765170808Sdelphij 766171069Sdelphijstatic int 767170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 768170808Sdelphij{ 769170808Sdelphij struct vnode *dvp = v->a_dvp; 770170808Sdelphij struct vnode *vp = v->a_vp; 771170808Sdelphij 772170808Sdelphij int error; 773170808Sdelphij struct tmpfs_dirent *de; 774170808Sdelphij struct tmpfs_mount *tmp; 775170808Sdelphij struct tmpfs_node *dnode; 776170808Sdelphij struct tmpfs_node *node; 777170808Sdelphij 778170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 779170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 780170808Sdelphij 781170808Sdelphij if (vp->v_type == VDIR) { 782170808Sdelphij error = EISDIR; 783170808Sdelphij goto out; 784170808Sdelphij } 785170808Sdelphij 786170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 787170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 788170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 789170808Sdelphij de = node->tn_lookup_dirent; 790170808Sdelphij MPASS(de != NULL); 791170808Sdelphij 792170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 793170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 794170808Sdelphij (dnode->tn_flags & APPEND)) { 795170808Sdelphij error = EPERM; 796170808Sdelphij goto out; 797170808Sdelphij } 798170808Sdelphij 799170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 800170808Sdelphij * have to change the number of hard links of the directory. */ 801170808Sdelphij tmpfs_dir_detach(dvp, de); 802170808Sdelphij 803170808Sdelphij /* Free the directory entry we just deleted. Note that the node 804170808Sdelphij * referred by it will not be removed until the vnode is really 805170808Sdelphij * reclaimed. */ 806170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 807170808Sdelphij 808170808Sdelphij if (node->tn_links > 0) 809170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 810170808Sdelphij TMPFS_NODE_MODIFIED; 811170808Sdelphij error = 0; 812170808Sdelphij 813170808Sdelphijout: 814170808Sdelphij 815170808Sdelphij return error; 816170808Sdelphij} 817170808Sdelphij 818170808Sdelphij/* --------------------------------------------------------------------- */ 819170808Sdelphij 820171069Sdelphijstatic int 821170808Sdelphijtmpfs_link(struct vop_link_args *v) 822170808Sdelphij{ 823170808Sdelphij struct vnode *dvp = v->a_tdvp; 824170808Sdelphij struct vnode *vp = v->a_vp; 825170808Sdelphij struct componentname *cnp = v->a_cnp; 826170808Sdelphij 827170808Sdelphij int error; 828170808Sdelphij struct tmpfs_dirent *de; 829170808Sdelphij struct tmpfs_node *node; 830170808Sdelphij 831170808Sdelphij MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 832170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 833170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 834170808Sdelphij 835170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 836170808Sdelphij 837170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 838170808Sdelphij 839170808Sdelphij /* Hard links of directories are forbidden. */ 840170808Sdelphij if (vp->v_type == VDIR) { 841170808Sdelphij error = EPERM; 842170808Sdelphij goto out; 843170808Sdelphij } 844170808Sdelphij 845170808Sdelphij /* Cannot create cross-device links. */ 846170808Sdelphij if (dvp->v_mount != vp->v_mount) { 847170808Sdelphij error = EXDEV; 848170808Sdelphij goto out; 849170808Sdelphij } 850170808Sdelphij 851170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 852170808Sdelphij * by the system. */ 853170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 854170808Sdelphij if (node->tn_links == LINK_MAX) { 855170808Sdelphij error = EMLINK; 856170808Sdelphij goto out; 857170808Sdelphij } 858170808Sdelphij 859170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 860170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 861170808Sdelphij error = EPERM; 862170808Sdelphij goto out; 863170808Sdelphij } 864170808Sdelphij 865170808Sdelphij /* Allocate a new directory entry to represent the node. */ 866170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 867170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 868170808Sdelphij if (error != 0) 869170808Sdelphij goto out; 870170808Sdelphij 871170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 872170808Sdelphij tmpfs_dir_attach(dvp, de); 873170808Sdelphij 874170808Sdelphij /* vp link count has changed, so update node times. */ 875170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 876170808Sdelphij tmpfs_update(vp); 877170808Sdelphij 878170808Sdelphij error = 0; 879171070Sdelphij 880170808Sdelphijout: 881170808Sdelphij return error; 882170808Sdelphij} 883170808Sdelphij 884170808Sdelphij/* --------------------------------------------------------------------- */ 885170808Sdelphij 886171069Sdelphijstatic int 887170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 888170808Sdelphij{ 889170808Sdelphij struct vnode *fdvp = v->a_fdvp; 890170808Sdelphij struct vnode *fvp = v->a_fvp; 891170808Sdelphij struct componentname *fcnp = v->a_fcnp; 892170808Sdelphij struct vnode *tdvp = v->a_tdvp; 893170808Sdelphij struct vnode *tvp = v->a_tvp; 894170808Sdelphij struct componentname *tcnp = v->a_tcnp; 895170808Sdelphij 896170808Sdelphij char *newname; 897170808Sdelphij int error; 898170808Sdelphij struct tmpfs_dirent *de; 899170808Sdelphij struct tmpfs_node *fdnode; 900170808Sdelphij struct tmpfs_node *fnode; 901171799Sdelphij struct tmpfs_node *tnode; 902170808Sdelphij struct tmpfs_node *tdnode; 903170808Sdelphij 904170808Sdelphij MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 905170808Sdelphij MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 906170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 907170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 908170808Sdelphij 909170808Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 910170808Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 911171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 912170808Sdelphij de = fnode->tn_lookup_dirent; 913170808Sdelphij 914170808Sdelphij /* Disallow cross-device renames. 915170808Sdelphij * XXX Why isn't this done by the caller? */ 916170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 917170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 918170808Sdelphij error = EXDEV; 919170808Sdelphij goto out; 920170808Sdelphij } 921170808Sdelphij 922170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 923170808Sdelphij 924170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 925170808Sdelphij if (fvp == tvp) { 926170808Sdelphij error = 0; 927170808Sdelphij goto out; 928170808Sdelphij } 929170808Sdelphij 930170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 931170808Sdelphij if (de == NULL) { 932170808Sdelphij MPASS(fvp->v_type == VDIR); 933170808Sdelphij error = EINVAL; 934170808Sdelphij goto out; 935170808Sdelphij } 936170808Sdelphij MPASS(de->td_node == fnode); 937170808Sdelphij 938171070Sdelphij /* If re-naming a directory to another preexisting directory 939170808Sdelphij * ensure that the target directory is empty so that its 940171070Sdelphij * removal causes no side effects. 941170808Sdelphij * Kern_rename gurantees the destination to be a directory 942170808Sdelphij * if the source is one. */ 943170808Sdelphij if (tvp != NULL) { 944171799Sdelphij MPASS(tnode != NULL); 945171070Sdelphij 946170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 947170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 948170808Sdelphij error = EPERM; 949170808Sdelphij goto out; 950170808Sdelphij } 951170808Sdelphij 952171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 953171799Sdelphij if (tnode->tn_size > 0) { 954171799Sdelphij error = ENOTEMPTY; 955171799Sdelphij goto out; 956171799Sdelphij } 957171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 958171799Sdelphij error = ENOTDIR; 959170808Sdelphij goto out; 960171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 961171799Sdelphij error = EISDIR; 962171799Sdelphij goto out; 963171799Sdelphij } else { 964171799Sdelphij MPASS(fnode->tn_type != VDIR && 965171799Sdelphij tnode->tn_type != VDIR); 966170808Sdelphij } 967170808Sdelphij } 968170808Sdelphij 969170808Sdelphij /* If we need to move the directory between entries, lock the 970170808Sdelphij * source so that we can safely operate on it. */ 971170808Sdelphij if (fdnode != tdnode) { 972170808Sdelphij error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 973170808Sdelphij if (error != 0) 974170808Sdelphij goto out; 975170808Sdelphij } 976170808Sdelphij 977170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 978170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 979170808Sdelphij error = EPERM; 980170808Sdelphij goto out_locked; 981170808Sdelphij } 982170808Sdelphij 983170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 984170808Sdelphij * has to be changed. */ 985170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 986170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 987171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 988170808Sdelphij } else 989170808Sdelphij newname = NULL; 990170808Sdelphij 991170808Sdelphij /* If the node is being moved to another directory, we have to do 992170808Sdelphij * the move. */ 993170808Sdelphij if (fdnode != tdnode) { 994170808Sdelphij /* In case we are moving a directory, we have to adjust its 995170808Sdelphij * parent to point to the new parent. */ 996170808Sdelphij if (de->td_node->tn_type == VDIR) { 997170808Sdelphij struct tmpfs_node *n; 998170808Sdelphij 999170808Sdelphij /* Ensure the target directory is not a child of the 1000170808Sdelphij * directory being moved. Otherwise, we'd end up 1001170808Sdelphij * with stale nodes. */ 1002170808Sdelphij n = tdnode; 1003170808Sdelphij while (n != n->tn_dir.tn_parent) { 1004170808Sdelphij if (n == fnode) { 1005170808Sdelphij error = EINVAL; 1006170808Sdelphij if (newname != NULL) 1007171087Sdelphij free(newname, M_TMPFSNAME); 1008170808Sdelphij goto out_locked; 1009170808Sdelphij } 1010170808Sdelphij n = n->tn_dir.tn_parent; 1011170808Sdelphij } 1012170808Sdelphij 1013170808Sdelphij /* Adjust the parent pointer. */ 1014170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1015170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1016170808Sdelphij 1017170808Sdelphij /* As a result of changing the target of the '..' 1018170808Sdelphij * entry, the link count of the source and target 1019170808Sdelphij * directories has to be adjusted. */ 1020170808Sdelphij fdnode->tn_links--; 1021170808Sdelphij tdnode->tn_links++; 1022170808Sdelphij } 1023170808Sdelphij 1024170808Sdelphij /* Do the move: just remove the entry from the source directory 1025170808Sdelphij * and insert it into the target one. */ 1026170808Sdelphij tmpfs_dir_detach(fdvp, de); 1027170808Sdelphij tmpfs_dir_attach(tdvp, de); 1028170808Sdelphij } 1029170808Sdelphij 1030170808Sdelphij /* If the name has changed, we need to make it effective by changing 1031170808Sdelphij * it in the directory entry. */ 1032170808Sdelphij if (newname != NULL) { 1033170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1034170808Sdelphij 1035171087Sdelphij free(de->td_name, M_TMPFSNAME); 1036170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1037170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1038170808Sdelphij de->td_name = newname; 1039170808Sdelphij 1040170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1041170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1042170808Sdelphij } 1043170808Sdelphij 1044170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1045170808Sdelphij * from the target directory. */ 1046170808Sdelphij if (tvp != NULL) { 1047170808Sdelphij /* Remove the old entry from the target directory. */ 1048170808Sdelphij de = tnode->tn_lookup_dirent; 1049170808Sdelphij tmpfs_dir_detach(tdvp, de); 1050170808Sdelphij 1051170808Sdelphij /* Free the directory entry we just deleted. Note that the 1052170808Sdelphij * node referred by it will not be removed until the vnode is 1053170808Sdelphij * really reclaimed. */ 1054170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1055170808Sdelphij } 1056170808Sdelphij 1057170808Sdelphij error = 0; 1058170808Sdelphij 1059170808Sdelphijout_locked: 1060170808Sdelphij if (fdnode != tdnode) 1061170808Sdelphij VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 1062170808Sdelphij 1063170808Sdelphijout: 1064170808Sdelphij /* Release target nodes. */ 1065170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1066170808Sdelphij * other code takes care of this... */ 1067170808Sdelphij if (tdvp == tvp) 1068170808Sdelphij vrele(tdvp); 1069170808Sdelphij else 1070170808Sdelphij vput(tdvp); 1071170808Sdelphij if (tvp != NULL) 1072170808Sdelphij vput(tvp); 1073170808Sdelphij 1074170808Sdelphij /* Release source nodes. */ 1075170808Sdelphij vrele(fdvp); 1076170808Sdelphij vrele(fvp); 1077170808Sdelphij 1078170808Sdelphij return error; 1079170808Sdelphij} 1080170808Sdelphij 1081170808Sdelphij/* --------------------------------------------------------------------- */ 1082170808Sdelphij 1083171069Sdelphijstatic int 1084170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1085170808Sdelphij{ 1086170808Sdelphij struct vnode *dvp = v->a_dvp; 1087170808Sdelphij struct vnode **vpp = v->a_vpp; 1088170808Sdelphij struct componentname *cnp = v->a_cnp; 1089170808Sdelphij struct vattr *vap = v->a_vap; 1090170808Sdelphij 1091170808Sdelphij MPASS(vap->va_type == VDIR); 1092170808Sdelphij 1093170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1094170808Sdelphij} 1095170808Sdelphij 1096170808Sdelphij/* --------------------------------------------------------------------- */ 1097170808Sdelphij 1098171069Sdelphijstatic int 1099170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1100170808Sdelphij{ 1101170808Sdelphij struct vnode *dvp = v->a_dvp; 1102170808Sdelphij struct vnode *vp = v->a_vp; 1103170808Sdelphij 1104170808Sdelphij int error; 1105170808Sdelphij struct tmpfs_dirent *de; 1106170808Sdelphij struct tmpfs_mount *tmp; 1107170808Sdelphij struct tmpfs_node *dnode; 1108170808Sdelphij struct tmpfs_node *node; 1109170808Sdelphij 1110170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 1111170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 1112170808Sdelphij 1113170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1114170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1115170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1116170808Sdelphij 1117171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1118171070Sdelphij * removed. */ 1119171070Sdelphij if (node->tn_size > 0) { 1120171070Sdelphij error = ENOTEMPTY; 1121171070Sdelphij goto out; 1122171070Sdelphij } 1123170808Sdelphij 1124170808Sdelphij if ((dnode->tn_flags & APPEND) 1125170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1126170808Sdelphij error = EPERM; 1127170808Sdelphij goto out; 1128170808Sdelphij } 1129170808Sdelphij 1130171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1131171070Sdelphij * We checked for that above so this is safe now. */ 1132170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1133170808Sdelphij 1134170808Sdelphij /* Get the directory entry associated with node (vp). This was 1135170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1136170808Sdelphij de = node->tn_lookup_dirent; 1137170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1138170808Sdelphij v->a_cnp->cn_nameptr, 1139170808Sdelphij v->a_cnp->cn_namelen)); 1140170808Sdelphij 1141170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1142170808Sdelphij if (dnode->tn_flags & APPEND 1143170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1144170808Sdelphij error = EPERM; 1145170808Sdelphij goto out; 1146170808Sdelphij } 1147170808Sdelphij 1148170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1149170808Sdelphij tmpfs_dir_detach(dvp, de); 1150170808Sdelphij 1151170808Sdelphij node->tn_links--; 1152170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1153170808Sdelphij TMPFS_NODE_MODIFIED; 1154170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1155170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1156170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1157170808Sdelphij 1158171070Sdelphij cache_purge(dvp); 1159170808Sdelphij cache_purge(vp); 1160170808Sdelphij 1161170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1162170808Sdelphij * referred by it will not be removed until the vnode is really 1163170808Sdelphij * reclaimed. */ 1164170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1165170808Sdelphij 1166170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1167170808Sdelphij * interested parties and clean it from the cache). */ 1168170808Sdelphij 1169170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1170170808Sdelphij tmpfs_update(dvp); 1171170808Sdelphij 1172170808Sdelphij error = 0; 1173170808Sdelphij 1174170808Sdelphijout: 1175170808Sdelphij return error; 1176170808Sdelphij} 1177170808Sdelphij 1178170808Sdelphij/* --------------------------------------------------------------------- */ 1179170808Sdelphij 1180171069Sdelphijstatic int 1181170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1182170808Sdelphij{ 1183170808Sdelphij struct vnode *dvp = v->a_dvp; 1184170808Sdelphij struct vnode **vpp = v->a_vpp; 1185170808Sdelphij struct componentname *cnp = v->a_cnp; 1186170808Sdelphij struct vattr *vap = v->a_vap; 1187170808Sdelphij char *target = v->a_target; 1188170808Sdelphij 1189170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1190170808Sdelphij MPASS(vap->va_type == VLNK); 1191170808Sdelphij#else 1192170808Sdelphij vap->va_type = VLNK; 1193170808Sdelphij#endif 1194170808Sdelphij 1195170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1196170808Sdelphij} 1197170808Sdelphij 1198170808Sdelphij/* --------------------------------------------------------------------- */ 1199170808Sdelphij 1200171069Sdelphijstatic int 1201170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1202170808Sdelphij{ 1203170808Sdelphij struct vnode *vp = v->a_vp; 1204170808Sdelphij struct uio *uio = v->a_uio; 1205170808Sdelphij int *eofflag = v->a_eofflag; 1206170808Sdelphij u_long **cookies = v->a_cookies; 1207170808Sdelphij int *ncookies = v->a_ncookies; 1208170808Sdelphij 1209170808Sdelphij int error; 1210170808Sdelphij off_t startoff; 1211171802Sdelphij off_t cnt = 0; 1212170808Sdelphij struct tmpfs_node *node; 1213170808Sdelphij 1214170808Sdelphij /* This operation only makes sense on directory nodes. */ 1215171802Sdelphij if (vp->v_type != VDIR) 1216171802Sdelphij return ENOTDIR; 1217170808Sdelphij 1218170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1219170808Sdelphij 1220170808Sdelphij startoff = uio->uio_offset; 1221170808Sdelphij 1222171802Sdelphij switch (startoff) { 1223171802Sdelphij case TMPFS_DIRCOOKIE_DOT: 1224170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1225171802Sdelphij if (error == 0) 1226171802Sdelphij cnt++; 1227171802Sdelphij break; 1228171802Sdelphij case TMPFS_DIRCOOKIE_DOTDOT: 1229170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1230171802Sdelphij if (error == 0) 1231171802Sdelphij cnt++; 1232171802Sdelphij break; 1233171802Sdelphij default: 1234171802Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1235171802Sdelphij MPASS(error >= -1); 1236170808Sdelphij } 1237170808Sdelphij 1238170808Sdelphij if (error == -1) 1239170808Sdelphij error = 0; 1240170808Sdelphij 1241170808Sdelphij if (eofflag != NULL) 1242170808Sdelphij *eofflag = 1243170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1244170808Sdelphij 1245170808Sdelphij /* Update NFS-related variables. */ 1246170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1247170808Sdelphij off_t i; 1248170808Sdelphij off_t off = startoff; 1249170808Sdelphij struct tmpfs_dirent *de = NULL; 1250170808Sdelphij 1251170808Sdelphij *ncookies = cnt; 1252170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1253170808Sdelphij 1254170808Sdelphij for (i = 0; i < cnt; i++) { 1255170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1256170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1257170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1258170808Sdelphij } else { 1259170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1260170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1261170808Sdelphij } else if (de != NULL) { 1262170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1263170808Sdelphij } else { 1264170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1265170808Sdelphij off); 1266170808Sdelphij MPASS(de != NULL); 1267170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1268170808Sdelphij } 1269171802Sdelphij if (de == NULL) 1270170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1271171802Sdelphij else 1272171802Sdelphij off = tmpfs_dircookie(de); 1273170808Sdelphij } 1274170808Sdelphij 1275170808Sdelphij (*cookies)[i] = off; 1276170808Sdelphij } 1277170808Sdelphij MPASS(uio->uio_offset == off); 1278170808Sdelphij } 1279170808Sdelphij 1280170808Sdelphij return error; 1281170808Sdelphij} 1282170808Sdelphij 1283170808Sdelphij/* --------------------------------------------------------------------- */ 1284170808Sdelphij 1285171069Sdelphijstatic int 1286170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1287170808Sdelphij{ 1288170808Sdelphij struct vnode *vp = v->a_vp; 1289170808Sdelphij struct uio *uio = v->a_uio; 1290170808Sdelphij 1291170808Sdelphij int error; 1292170808Sdelphij struct tmpfs_node *node; 1293170808Sdelphij 1294170808Sdelphij MPASS(uio->uio_offset == 0); 1295170808Sdelphij MPASS(vp->v_type == VLNK); 1296170808Sdelphij 1297170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1298170808Sdelphij 1299170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1300170808Sdelphij uio); 1301170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1302170808Sdelphij 1303170808Sdelphij return error; 1304170808Sdelphij} 1305170808Sdelphij 1306170808Sdelphij/* --------------------------------------------------------------------- */ 1307170808Sdelphij 1308171069Sdelphijstatic int 1309170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1310170808Sdelphij{ 1311170808Sdelphij struct vnode *vp = v->a_vp; 1312170808Sdelphij struct thread *l = v->a_td; 1313170808Sdelphij 1314170808Sdelphij struct tmpfs_node *node; 1315170808Sdelphij 1316170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 1317170808Sdelphij 1318170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1319170808Sdelphij 1320170808Sdelphij if (node->tn_links == 0) 1321170808Sdelphij vrecycle(vp, l); 1322170808Sdelphij 1323170808Sdelphij return 0; 1324170808Sdelphij} 1325170808Sdelphij 1326170808Sdelphij/* --------------------------------------------------------------------- */ 1327170808Sdelphij 1328170808Sdelphijint 1329170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1330170808Sdelphij{ 1331170808Sdelphij struct vnode *vp = v->a_vp; 1332170808Sdelphij 1333170808Sdelphij struct tmpfs_mount *tmp; 1334170808Sdelphij struct tmpfs_node *node; 1335170808Sdelphij 1336170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1337170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1338171070Sdelphij 1339170808Sdelphij vnode_destroy_vobject(vp); 1340170808Sdelphij cache_purge(vp); 1341170808Sdelphij tmpfs_free_vp(vp); 1342170808Sdelphij 1343170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1344170808Sdelphij * we must free its associated data structures (now that the vnode 1345170808Sdelphij * is being reclaimed). */ 1346170808Sdelphij if (node->tn_links == 0) 1347170808Sdelphij tmpfs_free_node(tmp, node); 1348170808Sdelphij 1349170808Sdelphij MPASS(vp->v_data == NULL); 1350170808Sdelphij return 0; 1351170808Sdelphij} 1352170808Sdelphij 1353170808Sdelphij/* --------------------------------------------------------------------- */ 1354170808Sdelphij 1355171069Sdelphijstatic int 1356170808Sdelphijtmpfs_print(struct vop_print_args *v) 1357170808Sdelphij{ 1358170808Sdelphij struct vnode *vp = v->a_vp; 1359170808Sdelphij 1360170808Sdelphij struct tmpfs_node *node; 1361170808Sdelphij 1362170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1363170808Sdelphij 1364170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1365170808Sdelphij node, node->tn_flags, node->tn_links); 1366170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1367170808Sdelphij ", status 0x%x\n", 1368170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1369170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1370170808Sdelphij 1371170808Sdelphij if (vp->v_type == VFIFO) 1372170808Sdelphij fifo_printinfo(vp); 1373170808Sdelphij 1374170808Sdelphij printf("\n"); 1375170808Sdelphij 1376170808Sdelphij return 0; 1377170808Sdelphij} 1378170808Sdelphij 1379170808Sdelphij/* --------------------------------------------------------------------- */ 1380170808Sdelphij 1381171069Sdelphijstatic int 1382170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1383170808Sdelphij{ 1384170808Sdelphij int name = v->a_name; 1385170808Sdelphij register_t *retval = v->a_retval; 1386170808Sdelphij 1387170808Sdelphij int error; 1388170808Sdelphij 1389170808Sdelphij error = 0; 1390170808Sdelphij 1391170808Sdelphij switch (name) { 1392170808Sdelphij case _PC_LINK_MAX: 1393170808Sdelphij *retval = LINK_MAX; 1394170808Sdelphij break; 1395170808Sdelphij 1396170808Sdelphij case _PC_NAME_MAX: 1397170808Sdelphij *retval = NAME_MAX; 1398170808Sdelphij break; 1399170808Sdelphij 1400170808Sdelphij case _PC_PATH_MAX: 1401170808Sdelphij *retval = PATH_MAX; 1402170808Sdelphij break; 1403170808Sdelphij 1404170808Sdelphij case _PC_PIPE_BUF: 1405170808Sdelphij *retval = PIPE_BUF; 1406170808Sdelphij break; 1407170808Sdelphij 1408170808Sdelphij case _PC_CHOWN_RESTRICTED: 1409170808Sdelphij *retval = 1; 1410170808Sdelphij break; 1411170808Sdelphij 1412170808Sdelphij case _PC_NO_TRUNC: 1413170808Sdelphij *retval = 1; 1414170808Sdelphij break; 1415170808Sdelphij 1416170808Sdelphij case _PC_SYNC_IO: 1417170808Sdelphij *retval = 1; 1418170808Sdelphij break; 1419170808Sdelphij 1420170808Sdelphij case _PC_FILESIZEBITS: 1421170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1422170808Sdelphij break; 1423170808Sdelphij 1424170808Sdelphij default: 1425170808Sdelphij error = EINVAL; 1426170808Sdelphij } 1427170808Sdelphij 1428170808Sdelphij return error; 1429170808Sdelphij} 1430170808Sdelphij 1431170808Sdelphij/* --------------------------------------------------------------------- */ 1432170808Sdelphij 1433171069Sdelphijstatic int 1434170808Sdelphijtmpfs_advlock(struct vop_advlock_args *v) 1435170808Sdelphij{ 1436170808Sdelphij struct vnode *vp = v->a_vp; 1437170808Sdelphij 1438170808Sdelphij struct tmpfs_node *node; 1439170808Sdelphij 1440170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1441170808Sdelphij 1442170808Sdelphij return lf_advlock(v, &node->tn_lockf, node->tn_size); 1443170808Sdelphij} 1444170808Sdelphij 1445170808Sdelphij/* --------------------------------------------------------------------- */ 1446170808Sdelphij 1447171069Sdelphijstatic int 1448170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1449170808Sdelphij{ 1450170808Sdelphij struct tmpfs_fid *tfhp; 1451170808Sdelphij struct tmpfs_node *node; 1452170808Sdelphij 1453170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1454170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1455170808Sdelphij 1456170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1457170808Sdelphij tfhp->tf_id = node->tn_id; 1458170808Sdelphij tfhp->tf_gen = node->tn_gen; 1459171070Sdelphij 1460170808Sdelphij return (0); 1461170808Sdelphij} 1462171069Sdelphij 1463171069Sdelphij/* --------------------------------------------------------------------- */ 1464171069Sdelphij 1465171069Sdelphij/* 1466171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1467171069Sdelphij */ 1468171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1469171069Sdelphij .vop_default = &default_vnodeops, 1470171069Sdelphij .vop_lookup = vfs_cache_lookup, 1471171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1472171069Sdelphij .vop_create = tmpfs_create, 1473171069Sdelphij .vop_mknod = tmpfs_mknod, 1474171069Sdelphij .vop_open = tmpfs_open, 1475171069Sdelphij .vop_close = tmpfs_close, 1476171069Sdelphij .vop_access = tmpfs_access, 1477171069Sdelphij .vop_getattr = tmpfs_getattr, 1478171069Sdelphij .vop_setattr = tmpfs_setattr, 1479171069Sdelphij .vop_read = tmpfs_read, 1480171069Sdelphij .vop_write = tmpfs_write, 1481171069Sdelphij .vop_fsync = tmpfs_fsync, 1482171069Sdelphij .vop_remove = tmpfs_remove, 1483171069Sdelphij .vop_link = tmpfs_link, 1484171069Sdelphij .vop_rename = tmpfs_rename, 1485171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1486171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1487171069Sdelphij .vop_symlink = tmpfs_symlink, 1488171069Sdelphij .vop_readdir = tmpfs_readdir, 1489171069Sdelphij .vop_readlink = tmpfs_readlink, 1490171069Sdelphij .vop_inactive = tmpfs_inactive, 1491171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1492171069Sdelphij .vop_print = tmpfs_print, 1493171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1494171069Sdelphij .vop_advlock = tmpfs_advlock, 1495171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1496171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1497171069Sdelphij}; 1498171069Sdelphij 1499