tmpfs_vnops.c revision 171799
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 171799 2007-08-10 05:24:49Z 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); 101171799Sdelphij vholdl(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); 108171799Sdelphij if (ltype & LK_INTERLOCK) 109171799Sdelphij vdropl(dvp); 110171799Sdelphij else 111171799Sdelphij vdrop(dvp); 112170808Sdelphij 113170808Sdelphij dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 114170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 115170808Sdelphij VREF(dvp); 116170808Sdelphij *vpp = dvp; 117170808Sdelphij dnode->tn_lookup_dirent = NULL; 118170808Sdelphij error = 0; 119170808Sdelphij } else { 120170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 121170808Sdelphij if (de == NULL) { 122170808Sdelphij /* The entry was not found in the directory. 123170808Sdelphij * This is OK if we are creating or renaming an 124170808Sdelphij * entry and are working on the last component of 125170808Sdelphij * the path name. */ 126170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 127170808Sdelphij (cnp->cn_nameiop == CREATE || \ 128170808Sdelphij cnp->cn_nameiop == RENAME)) { 129170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 130170808Sdelphij cnp->cn_thread); 131170808Sdelphij if (error != 0) 132170808Sdelphij goto out; 133170808Sdelphij 134170808Sdelphij /* Keep the component name in the buffer for 135170808Sdelphij * future uses. */ 136170808Sdelphij cnp->cn_flags |= SAVENAME; 137170808Sdelphij 138170808Sdelphij error = EJUSTRETURN; 139170808Sdelphij } else 140170808Sdelphij error = ENOENT; 141170808Sdelphij } else { 142170808Sdelphij struct tmpfs_node *tnode; 143170808Sdelphij 144170808Sdelphij /* The entry was found, so get its associated 145170808Sdelphij * tmpfs_node. */ 146170808Sdelphij tnode = de->td_node; 147170808Sdelphij 148170808Sdelphij /* If we are not at the last path component and 149170808Sdelphij * found a non-directory or non-link entry (which 150170808Sdelphij * may itself be pointing to a directory), raise 151170808Sdelphij * an error. */ 152170808Sdelphij if ((tnode->tn_type != VDIR && 153170808Sdelphij tnode->tn_type != VLNK) && 154170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 155170808Sdelphij error = ENOTDIR; 156170808Sdelphij goto out; 157170808Sdelphij } 158170808Sdelphij 159170808Sdelphij /* If we are deleting or renaming the entry, keep 160170808Sdelphij * track of its tmpfs_dirent so that it can be 161170808Sdelphij * easily deleted later. */ 162170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 163170808Sdelphij (cnp->cn_nameiop == DELETE || 164170808Sdelphij cnp->cn_nameiop == RENAME)) { 165170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 166170808Sdelphij cnp->cn_thread); 167170808Sdelphij if (error != 0) 168170808Sdelphij goto out; 169171070Sdelphij 170170808Sdelphij /* Allocate a new vnode on the matching entry. */ 171171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 172171799Sdelphij cnp->cn_lkflags, vpp, td); 173170808Sdelphij if (error != 0) 174170808Sdelphij goto out; 175170808Sdelphij 176170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 177170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 178170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 179170808Sdelphij error = EPERM; 180170808Sdelphij vput(*vpp); 181170808Sdelphij *vpp = NULL; 182170808Sdelphij goto out; 183171070Sdelphij } 184170808Sdelphij tnode->tn_lookup_dirent = de; 185170808Sdelphij cnp->cn_flags |= SAVENAME; 186171799Sdelphij } else { 187171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 188171799Sdelphij cnp->cn_lkflags, vpp, td); 189170808Sdelphij } 190170808Sdelphij } 191170808Sdelphij } 192170808Sdelphij 193170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 194170808Sdelphij * request was for creation, as it does not improve timings on 195170808Sdelphij * emprical tests. */ 196170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 197170808Sdelphij cache_enter(dvp, *vpp, cnp); 198170808Sdelphij 199170808Sdelphijout: 200170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 201170808Sdelphij * locked. */ 202170808Sdelphij MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 203170808Sdelphij 204170808Sdelphij return error; 205170808Sdelphij} 206170808Sdelphij 207170808Sdelphij/* --------------------------------------------------------------------- */ 208170808Sdelphij 209171069Sdelphijstatic int 210170808Sdelphijtmpfs_create(struct vop_create_args *v) 211170808Sdelphij{ 212170808Sdelphij struct vnode *dvp = v->a_dvp; 213170808Sdelphij struct vnode **vpp = v->a_vpp; 214170808Sdelphij struct componentname *cnp = v->a_cnp; 215170808Sdelphij struct vattr *vap = v->a_vap; 216170808Sdelphij 217170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 218170808Sdelphij 219170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 220170808Sdelphij} 221170808Sdelphij/* --------------------------------------------------------------------- */ 222170808Sdelphij 223171069Sdelphijstatic int 224170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 225170808Sdelphij{ 226170808Sdelphij struct vnode *dvp = v->a_dvp; 227170808Sdelphij struct vnode **vpp = v->a_vpp; 228170808Sdelphij struct componentname *cnp = v->a_cnp; 229170808Sdelphij struct vattr *vap = v->a_vap; 230170808Sdelphij 231170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 232170808Sdelphij vap->va_type != VFIFO) 233170808Sdelphij return EINVAL; 234170808Sdelphij 235170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 236170808Sdelphij} 237170808Sdelphij 238170808Sdelphij/* --------------------------------------------------------------------- */ 239170808Sdelphij 240171069Sdelphijstatic int 241170808Sdelphijtmpfs_open(struct vop_open_args *v) 242170808Sdelphij{ 243170808Sdelphij struct vnode *vp = v->a_vp; 244170808Sdelphij int mode = v->a_mode; 245170808Sdelphij 246170808Sdelphij int error; 247170808Sdelphij struct tmpfs_node *node; 248170808Sdelphij 249170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 250170808Sdelphij 251170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 252171070Sdelphij 253170808Sdelphij /* The file is still active but all its names have been removed 254170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 255170808Sdelphij * it is about to die. */ 256170808Sdelphij if (node->tn_links < 1) 257170808Sdelphij return (ENOENT); 258170808Sdelphij 259170808Sdelphij /* If the file is marked append-only, deny write requests. */ 260170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 261170808Sdelphij error = EPERM; 262170808Sdelphij else { 263170808Sdelphij error = 0; 264171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 265170808Sdelphij } 266170808Sdelphij 267170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 268170808Sdelphij return error; 269170808Sdelphij} 270170808Sdelphij 271170808Sdelphij/* --------------------------------------------------------------------- */ 272170808Sdelphij 273171069Sdelphijstatic int 274170808Sdelphijtmpfs_close(struct vop_close_args *v) 275170808Sdelphij{ 276170808Sdelphij struct vnode *vp = v->a_vp; 277170808Sdelphij 278170808Sdelphij struct tmpfs_node *node; 279170808Sdelphij 280170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 281170808Sdelphij 282170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 283170808Sdelphij 284170808Sdelphij if (node->tn_links > 0) { 285170808Sdelphij /* Update node times. No need to do it if the node has 286170808Sdelphij * been deleted, because it will vanish after we return. */ 287170808Sdelphij tmpfs_update(vp); 288170808Sdelphij } 289170808Sdelphij 290170808Sdelphij return 0; 291170808Sdelphij} 292170808Sdelphij 293170808Sdelphij/* --------------------------------------------------------------------- */ 294170808Sdelphij 295170808Sdelphijint 296170808Sdelphijtmpfs_access(struct vop_access_args *v) 297170808Sdelphij{ 298170808Sdelphij struct vnode *vp = v->a_vp; 299170808Sdelphij int mode = v->a_mode; 300170808Sdelphij struct ucred *cred = v->a_cred; 301170808Sdelphij 302170808Sdelphij int error; 303170808Sdelphij struct tmpfs_node *node; 304170808Sdelphij 305170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 306170808Sdelphij 307170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 308170808Sdelphij 309170808Sdelphij switch (vp->v_type) { 310170808Sdelphij case VDIR: 311170808Sdelphij /* FALLTHROUGH */ 312170808Sdelphij case VLNK: 313170808Sdelphij /* FALLTHROUGH */ 314170808Sdelphij case VREG: 315170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 316170808Sdelphij error = EROFS; 317170808Sdelphij goto out; 318170808Sdelphij } 319170808Sdelphij break; 320170808Sdelphij 321170808Sdelphij case VBLK: 322170808Sdelphij /* FALLTHROUGH */ 323170808Sdelphij case VCHR: 324170808Sdelphij /* FALLTHROUGH */ 325170808Sdelphij case VSOCK: 326170808Sdelphij /* FALLTHROUGH */ 327170808Sdelphij case VFIFO: 328170808Sdelphij break; 329170808Sdelphij 330170808Sdelphij default: 331170808Sdelphij error = EINVAL; 332170808Sdelphij goto out; 333170808Sdelphij } 334170808Sdelphij 335170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 336170808Sdelphij error = EPERM; 337170808Sdelphij goto out; 338170808Sdelphij } 339170808Sdelphij 340170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 341170808Sdelphij node->tn_gid, mode, cred, NULL); 342170808Sdelphij 343170808Sdelphijout: 344170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 345170808Sdelphij 346170808Sdelphij return error; 347170808Sdelphij} 348170808Sdelphij 349170808Sdelphij/* --------------------------------------------------------------------- */ 350170808Sdelphij 351170808Sdelphijint 352170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 353170808Sdelphij{ 354170808Sdelphij struct vnode *vp = v->a_vp; 355170808Sdelphij struct vattr *vap = v->a_vap; 356170808Sdelphij 357170808Sdelphij struct tmpfs_node *node; 358170808Sdelphij 359170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 360170808Sdelphij 361170808Sdelphij VATTR_NULL(vap); 362170808Sdelphij 363170808Sdelphij tmpfs_update(vp); 364170808Sdelphij 365170808Sdelphij vap->va_type = vp->v_type; 366170808Sdelphij vap->va_mode = node->tn_mode; 367170808Sdelphij vap->va_nlink = node->tn_links; 368170808Sdelphij vap->va_uid = node->tn_uid; 369170808Sdelphij vap->va_gid = node->tn_gid; 370170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 371170808Sdelphij vap->va_fileid = node->tn_id; 372170808Sdelphij vap->va_size = node->tn_size; 373170808Sdelphij vap->va_blocksize = PAGE_SIZE; 374170808Sdelphij vap->va_atime = node->tn_atime; 375170808Sdelphij vap->va_mtime = node->tn_mtime; 376170808Sdelphij vap->va_ctime = node->tn_ctime; 377170808Sdelphij vap->va_birthtime = node->tn_birthtime; 378170808Sdelphij vap->va_gen = node->tn_gen; 379170808Sdelphij vap->va_flags = node->tn_flags; 380170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 381170808Sdelphij node->tn_rdev : VNOVAL; 382170808Sdelphij vap->va_bytes = round_page(node->tn_size); 383170808Sdelphij vap->va_filerev = VNOVAL; 384170808Sdelphij vap->va_vaflags = 0; 385170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 386170808Sdelphij 387170808Sdelphij return 0; 388170808Sdelphij} 389170808Sdelphij 390170808Sdelphij/* --------------------------------------------------------------------- */ 391170808Sdelphij 392170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 393170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 394170808Sdelphijint 395170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 396170808Sdelphij{ 397170808Sdelphij struct vnode *vp = v->a_vp; 398170808Sdelphij struct vattr *vap = v->a_vap; 399170808Sdelphij struct ucred *cred = v->a_cred; 400170808Sdelphij struct thread *l = v->a_td; 401170808Sdelphij 402170808Sdelphij int error; 403170808Sdelphij 404170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 405170808Sdelphij 406170808Sdelphij error = 0; 407170808Sdelphij 408170808Sdelphij /* Abort if any unsettable attribute is given. */ 409170808Sdelphij if (vap->va_type != VNON || 410170808Sdelphij vap->va_nlink != VNOVAL || 411170808Sdelphij vap->va_fsid != VNOVAL || 412170808Sdelphij vap->va_fileid != VNOVAL || 413170808Sdelphij vap->va_blocksize != VNOVAL || 414170808Sdelphij vap->va_gen != VNOVAL || 415170808Sdelphij vap->va_rdev != VNOVAL || 416170808Sdelphij vap->va_bytes != VNOVAL) 417170808Sdelphij error = EINVAL; 418170808Sdelphij 419170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 420170808Sdelphij error = tmpfs_chflags(vp, vap->va_flags, cred, l); 421170808Sdelphij 422170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 423170808Sdelphij error = tmpfs_chsize(vp, vap->va_size, cred, l); 424170808Sdelphij 425170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 426170808Sdelphij error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 427170808Sdelphij l); 428170808Sdelphij 429170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 430170808Sdelphij error = tmpfs_chmod(vp, vap->va_mode, cred, l); 431170808Sdelphij 432170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 433170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 434170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 435170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 436170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 437170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 438171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 439170808Sdelphij &vap->va_birthtime, vap->va_vaflags, cred, l); 440170808Sdelphij 441170808Sdelphij /* Update the node times. We give preference to the error codes 442170808Sdelphij * generated by this function rather than the ones that may arise 443170808Sdelphij * from tmpfs_update. */ 444170808Sdelphij tmpfs_update(vp); 445170808Sdelphij 446170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 447170808Sdelphij 448170808Sdelphij return error; 449170808Sdelphij} 450170808Sdelphij 451170808Sdelphij/* --------------------------------------------------------------------- */ 452171489Sdelphij 453170808Sdelphijstatic int 454171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 455170808Sdelphij{ 456171489Sdelphij vm_pindex_t idx; 457171489Sdelphij vm_page_t m; 458171489Sdelphij struct sf_buf *sf; 459171489Sdelphij off_t offset, addr; 460171489Sdelphij size_t tlen; 461171489Sdelphij caddr_t va; 462171489Sdelphij int error; 463170808Sdelphij 464171489Sdelphij addr = uio->uio_offset; 465171489Sdelphij idx = OFF_TO_IDX(addr); 466171489Sdelphij offset = addr & PAGE_MASK; 467171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 468170808Sdelphij 469171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) 470171489Sdelphij goto nocache; 471170808Sdelphij 472171489Sdelphij VM_OBJECT_LOCK(vobj); 473171489Sdelphijlookupvpg: 474171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 475171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 476171489Sdelphij if (vm_page_sleep_if_busy(m, FALSE, "tmfsmr")) 477171489Sdelphij goto lookupvpg; 478171489Sdelphij vm_page_busy(m); 479171489Sdelphij VM_OBJECT_UNLOCK(vobj); 480170808Sdelphij sched_pin(); 481170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 482171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 483171489Sdelphij error = uiomove(va + offset, tlen, uio); 484170808Sdelphij sf_buf_free(sf); 485170808Sdelphij sched_unpin(); 486171489Sdelphij VM_OBJECT_LOCK(vobj); 487171489Sdelphij vm_page_wakeup(m); 488171489Sdelphij VM_OBJECT_UNLOCK(vobj); 489171489Sdelphij return (error); 490171799Sdelphij } 491171489Sdelphij VM_OBJECT_UNLOCK(vobj); 492171489Sdelphijnocache: 493171489Sdelphij VM_OBJECT_LOCK(tobj); 494171489Sdelphij vm_object_pip_add(tobj, 1); 495171489Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 496171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 497171489Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 498171489Sdelphij int behind, ahead; 499171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 500171489Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 501171489Sdelphij if (error != 0) { 502171489Sdelphij printf("tmpfs get pages from pager error [read]\n"); 503171489Sdelphij goto out; 504171489Sdelphij } 505171489Sdelphij } else 506170808Sdelphij vm_page_zero_invalid(m, TRUE); 507170808Sdelphij } 508171489Sdelphij VM_OBJECT_UNLOCK(tobj); 509171489Sdelphij sched_pin(); 510171489Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 511171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 512171489Sdelphij error = uiomove(va + offset, tlen, uio); 513171489Sdelphij sf_buf_free(sf); 514171489Sdelphij sched_unpin(); 515171489Sdelphij VM_OBJECT_LOCK(tobj); 516171308Sdelphijout: 517171489Sdelphij vm_page_lock_queues(); 518171489Sdelphij vm_page_unwire(m, 0); 519171489Sdelphij vm_page_activate(m); 520171489Sdelphij vm_page_unlock_queues(); 521171489Sdelphij vm_page_wakeup(m); 522171489Sdelphij vm_object_pip_subtract(tobj, 1); 523171489Sdelphij VM_OBJECT_UNLOCK(tobj); 524171489Sdelphij 525171489Sdelphij return (error); 526170808Sdelphij} 527170808Sdelphij 528171069Sdelphijstatic int 529170808Sdelphijtmpfs_read(struct vop_read_args *v) 530170808Sdelphij{ 531170808Sdelphij struct vnode *vp = v->a_vp; 532170808Sdelphij struct uio *uio = v->a_uio; 533170808Sdelphij 534170808Sdelphij struct tmpfs_node *node; 535170808Sdelphij vm_object_t uobj; 536171489Sdelphij size_t len; 537171489Sdelphij int resid; 538170808Sdelphij 539170808Sdelphij int error; 540170808Sdelphij 541170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 542170808Sdelphij 543170808Sdelphij if (vp->v_type != VREG) { 544170808Sdelphij error = EISDIR; 545170808Sdelphij goto out; 546170808Sdelphij } 547170808Sdelphij 548170808Sdelphij if (uio->uio_offset < 0) { 549170808Sdelphij error = EINVAL; 550170808Sdelphij goto out; 551170808Sdelphij } 552170808Sdelphij 553170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 554170808Sdelphij 555170808Sdelphij uobj = node->tn_reg.tn_aobj; 556171489Sdelphij while ((resid = uio->uio_resid) > 0) { 557171489Sdelphij error = 0; 558171489Sdelphij if (node->tn_size <= uio->uio_offset) 559171489Sdelphij break; 560171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 561171489Sdelphij if (len == 0) 562171489Sdelphij break; 563171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 564171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 565171489Sdelphij break; 566171489Sdelphij } 567170808Sdelphij 568170808Sdelphijout: 569170808Sdelphij 570170808Sdelphij return error; 571170808Sdelphij} 572170808Sdelphij 573170808Sdelphij/* --------------------------------------------------------------------- */ 574170808Sdelphij 575171069Sdelphijstatic int 576171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 577171489Sdelphij{ 578171489Sdelphij vm_pindex_t idx; 579171489Sdelphij vm_page_t vpg, tpg; 580171489Sdelphij struct sf_buf *sf; 581171489Sdelphij off_t offset, addr; 582171489Sdelphij size_t tlen; 583171489Sdelphij caddr_t va; 584171489Sdelphij int error; 585171489Sdelphij 586171489Sdelphij addr = uio->uio_offset; 587171489Sdelphij idx = OFF_TO_IDX(addr); 588171489Sdelphij offset = addr & PAGE_MASK; 589171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 590171489Sdelphij 591171489Sdelphij if ((vobj == NULL) || (vobj->resident_page_count == 0)) { 592171489Sdelphij vpg = NULL; 593171489Sdelphij goto nocache; 594171489Sdelphij } 595171489Sdelphij 596171489Sdelphij VM_OBJECT_LOCK(vobj); 597171489Sdelphijlookupvpg: 598171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 599171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 600171489Sdelphij if (vm_page_sleep_if_busy(vpg, FALSE, "tmfsmw")) 601171489Sdelphij goto lookupvpg; 602171489Sdelphij vm_page_busy(vpg); 603171489Sdelphij vm_page_lock_queues(); 604171489Sdelphij vm_page_undirty(vpg); 605171489Sdelphij vm_page_unlock_queues(); 606171489Sdelphij VM_OBJECT_UNLOCK(vobj); 607171489Sdelphij sched_pin(); 608171489Sdelphij sf = sf_buf_alloc(vpg, SFB_CPUPRIVATE); 609171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 610171489Sdelphij error = uiomove(va + offset, tlen, uio); 611171489Sdelphij sf_buf_free(sf); 612171489Sdelphij sched_unpin(); 613171489Sdelphij } else { 614171489Sdelphij VM_OBJECT_UNLOCK(vobj); 615171489Sdelphij vpg = NULL; 616171489Sdelphij } 617171489Sdelphijnocache: 618171489Sdelphij VM_OBJECT_LOCK(tobj); 619171489Sdelphij vm_object_pip_add(tobj, 1); 620171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 621171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 622171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 623171489Sdelphij int behind, ahead; 624171489Sdelphij if (vm_pager_has_page(tobj, idx, &behind, &ahead)) { 625171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 626171489Sdelphij if (error != 0) { 627171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 628171489Sdelphij goto out; 629171489Sdelphij } 630171489Sdelphij } else 631171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 632171489Sdelphij } 633171489Sdelphij VM_OBJECT_UNLOCK(tobj); 634171489Sdelphij if (vpg == NULL) { 635171489Sdelphij sched_pin(); 636171489Sdelphij sf = sf_buf_alloc(tpg, SFB_CPUPRIVATE); 637171489Sdelphij va = (caddr_t)sf_buf_kva(sf); 638171489Sdelphij error = uiomove(va + offset, tlen, uio); 639171489Sdelphij sf_buf_free(sf); 640171489Sdelphij sched_unpin(); 641171489Sdelphij } else { 642171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 643171489Sdelphij pmap_copy_page(vpg, tpg); 644171489Sdelphij } 645171489Sdelphij VM_OBJECT_LOCK(tobj); 646171489Sdelphijout: 647171489Sdelphij if (vobj != NULL) 648171489Sdelphij VM_OBJECT_LOCK(vobj); 649171489Sdelphij vm_page_lock_queues(); 650171489Sdelphij if (error == 0) { 651171489Sdelphij vm_page_set_validclean(tpg, offset, tlen); 652171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 653171489Sdelphij vm_page_dirty(tpg); 654171489Sdelphij } 655171489Sdelphij vm_page_unwire(tpg, 0); 656171489Sdelphij vm_page_activate(tpg); 657171489Sdelphij vm_page_unlock_queues(); 658171489Sdelphij vm_page_wakeup(tpg); 659171489Sdelphij if (vpg != NULL) 660171489Sdelphij vm_page_wakeup(vpg); 661171489Sdelphij if (vobj != NULL) 662171489Sdelphij VM_OBJECT_UNLOCK(vobj); 663171489Sdelphij vm_object_pip_subtract(tobj, 1); 664171489Sdelphij VM_OBJECT_UNLOCK(tobj); 665171489Sdelphij 666171489Sdelphij return (error); 667171489Sdelphij} 668171489Sdelphij 669171489Sdelphijstatic int 670170808Sdelphijtmpfs_write(struct vop_write_args *v) 671170808Sdelphij{ 672170808Sdelphij struct vnode *vp = v->a_vp; 673170808Sdelphij struct uio *uio = v->a_uio; 674170808Sdelphij int ioflag = v->a_ioflag; 675170808Sdelphij struct thread *td = uio->uio_td; 676170808Sdelphij 677170808Sdelphij boolean_t extended; 678171489Sdelphij int error = 0; 679170808Sdelphij off_t oldsize; 680170808Sdelphij struct tmpfs_node *node; 681170808Sdelphij vm_object_t uobj; 682171489Sdelphij size_t len; 683171489Sdelphij int resid; 684170808Sdelphij 685170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 686170808Sdelphij oldsize = node->tn_size; 687170808Sdelphij 688170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 689170808Sdelphij error = EINVAL; 690170808Sdelphij goto out; 691170808Sdelphij } 692170808Sdelphij 693170808Sdelphij if (uio->uio_resid == 0) { 694170808Sdelphij error = 0; 695170808Sdelphij goto out; 696170808Sdelphij } 697170808Sdelphij 698170808Sdelphij if (ioflag & IO_APPEND) 699170808Sdelphij uio->uio_offset = node->tn_size; 700171070Sdelphij 701171070Sdelphij if (uio->uio_offset + uio->uio_resid > 702170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 703170808Sdelphij return (EFBIG); 704170808Sdelphij 705170808Sdelphij if (vp->v_type == VREG && td != NULL) { 706170808Sdelphij PROC_LOCK(td->td_proc); 707170808Sdelphij if (uio->uio_offset + uio->uio_resid > 708170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 709170808Sdelphij psignal(td->td_proc, SIGXFSZ); 710170808Sdelphij PROC_UNLOCK(td->td_proc); 711170808Sdelphij return (EFBIG); 712170808Sdelphij } 713170808Sdelphij PROC_UNLOCK(td->td_proc); 714170808Sdelphij } 715170808Sdelphij 716170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 717170808Sdelphij if (extended) { 718170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 719170808Sdelphij if (error != 0) 720170808Sdelphij goto out; 721170808Sdelphij } 722170808Sdelphij 723170808Sdelphij uobj = node->tn_reg.tn_aobj; 724171489Sdelphij while ((resid = uio->uio_resid) > 0) { 725171489Sdelphij if (node->tn_size <= uio->uio_offset) 726171489Sdelphij break; 727171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 728171489Sdelphij if (len == 0) 729171489Sdelphij break; 730171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 731171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 732171489Sdelphij break; 733171489Sdelphij } 734170808Sdelphij 735170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 736170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 737170808Sdelphij 738170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 739170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 740170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 741170808Sdelphij } 742170808Sdelphij 743170808Sdelphij if (error != 0) 744170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 745170808Sdelphij 746170808Sdelphijout: 747170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 748170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 749170808Sdelphij 750170808Sdelphij return error; 751170808Sdelphij} 752170808Sdelphij 753170808Sdelphij/* --------------------------------------------------------------------- */ 754170808Sdelphij 755171069Sdelphijstatic int 756170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 757170808Sdelphij{ 758170808Sdelphij struct vnode *vp = v->a_vp; 759170808Sdelphij 760170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 761170808Sdelphij 762170808Sdelphij tmpfs_update(vp); 763170808Sdelphij 764170808Sdelphij return 0; 765170808Sdelphij} 766170808Sdelphij 767170808Sdelphij/* --------------------------------------------------------------------- */ 768170808Sdelphij 769171069Sdelphijstatic int 770170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 771170808Sdelphij{ 772170808Sdelphij struct vnode *dvp = v->a_dvp; 773170808Sdelphij struct vnode *vp = v->a_vp; 774170808Sdelphij 775170808Sdelphij int error; 776170808Sdelphij struct tmpfs_dirent *de; 777170808Sdelphij struct tmpfs_mount *tmp; 778170808Sdelphij struct tmpfs_node *dnode; 779170808Sdelphij struct tmpfs_node *node; 780170808Sdelphij 781170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 782170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 783170808Sdelphij 784170808Sdelphij if (vp->v_type == VDIR) { 785170808Sdelphij error = EISDIR; 786170808Sdelphij goto out; 787170808Sdelphij } 788170808Sdelphij 789170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 790170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 791170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 792170808Sdelphij de = node->tn_lookup_dirent; 793170808Sdelphij MPASS(de != NULL); 794170808Sdelphij 795170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 796170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 797170808Sdelphij (dnode->tn_flags & APPEND)) { 798170808Sdelphij error = EPERM; 799170808Sdelphij goto out; 800170808Sdelphij } 801170808Sdelphij 802170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 803170808Sdelphij * have to change the number of hard links of the directory. */ 804170808Sdelphij tmpfs_dir_detach(dvp, de); 805170808Sdelphij 806170808Sdelphij /* Free the directory entry we just deleted. Note that the node 807170808Sdelphij * referred by it will not be removed until the vnode is really 808170808Sdelphij * reclaimed. */ 809170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 810170808Sdelphij 811170808Sdelphij if (node->tn_links > 0) 812170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 813170808Sdelphij TMPFS_NODE_MODIFIED; 814170808Sdelphij error = 0; 815170808Sdelphij 816170808Sdelphijout: 817170808Sdelphij 818170808Sdelphij return error; 819170808Sdelphij} 820170808Sdelphij 821170808Sdelphij/* --------------------------------------------------------------------- */ 822170808Sdelphij 823171069Sdelphijstatic int 824170808Sdelphijtmpfs_link(struct vop_link_args *v) 825170808Sdelphij{ 826170808Sdelphij struct vnode *dvp = v->a_tdvp; 827170808Sdelphij struct vnode *vp = v->a_vp; 828170808Sdelphij struct componentname *cnp = v->a_cnp; 829170808Sdelphij 830170808Sdelphij int error; 831170808Sdelphij struct tmpfs_dirent *de; 832170808Sdelphij struct tmpfs_node *node; 833170808Sdelphij 834170808Sdelphij MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 835170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 836170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 837170808Sdelphij 838170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 839170808Sdelphij 840170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 841170808Sdelphij 842170808Sdelphij /* Hard links of directories are forbidden. */ 843170808Sdelphij if (vp->v_type == VDIR) { 844170808Sdelphij error = EPERM; 845170808Sdelphij goto out; 846170808Sdelphij } 847170808Sdelphij 848170808Sdelphij /* Cannot create cross-device links. */ 849170808Sdelphij if (dvp->v_mount != vp->v_mount) { 850170808Sdelphij error = EXDEV; 851170808Sdelphij goto out; 852170808Sdelphij } 853170808Sdelphij 854170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 855170808Sdelphij * by the system. */ 856170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 857170808Sdelphij if (node->tn_links == LINK_MAX) { 858170808Sdelphij error = EMLINK; 859170808Sdelphij goto out; 860170808Sdelphij } 861170808Sdelphij 862170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 863170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 864170808Sdelphij error = EPERM; 865170808Sdelphij goto out; 866170808Sdelphij } 867170808Sdelphij 868170808Sdelphij /* Allocate a new directory entry to represent the node. */ 869170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 870170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 871170808Sdelphij if (error != 0) 872170808Sdelphij goto out; 873170808Sdelphij 874170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 875170808Sdelphij tmpfs_dir_attach(dvp, de); 876170808Sdelphij 877170808Sdelphij /* vp link count has changed, so update node times. */ 878170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 879170808Sdelphij tmpfs_update(vp); 880170808Sdelphij 881170808Sdelphij error = 0; 882171070Sdelphij 883170808Sdelphijout: 884170808Sdelphij return error; 885170808Sdelphij} 886170808Sdelphij 887170808Sdelphij/* --------------------------------------------------------------------- */ 888170808Sdelphij 889171069Sdelphijstatic int 890170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 891170808Sdelphij{ 892170808Sdelphij struct vnode *fdvp = v->a_fdvp; 893170808Sdelphij struct vnode *fvp = v->a_fvp; 894170808Sdelphij struct componentname *fcnp = v->a_fcnp; 895170808Sdelphij struct vnode *tdvp = v->a_tdvp; 896170808Sdelphij struct vnode *tvp = v->a_tvp; 897170808Sdelphij struct componentname *tcnp = v->a_tcnp; 898170808Sdelphij 899170808Sdelphij char *newname; 900170808Sdelphij int error; 901170808Sdelphij struct tmpfs_dirent *de; 902170808Sdelphij struct tmpfs_node *fdnode; 903170808Sdelphij struct tmpfs_node *fnode; 904171799Sdelphij struct tmpfs_node *tnode; 905170808Sdelphij struct tmpfs_node *tdnode; 906170808Sdelphij 907170808Sdelphij MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 908170808Sdelphij MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 909170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 910170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 911170808Sdelphij 912170808Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 913170808Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 914171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 915170808Sdelphij de = fnode->tn_lookup_dirent; 916170808Sdelphij 917170808Sdelphij /* Disallow cross-device renames. 918170808Sdelphij * XXX Why isn't this done by the caller? */ 919170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 920170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 921170808Sdelphij error = EXDEV; 922170808Sdelphij goto out; 923170808Sdelphij } 924170808Sdelphij 925170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 926170808Sdelphij 927170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 928170808Sdelphij if (fvp == tvp) { 929170808Sdelphij error = 0; 930170808Sdelphij goto out; 931170808Sdelphij } 932170808Sdelphij 933170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 934170808Sdelphij if (de == NULL) { 935170808Sdelphij MPASS(fvp->v_type == VDIR); 936170808Sdelphij error = EINVAL; 937170808Sdelphij goto out; 938170808Sdelphij } 939170808Sdelphij MPASS(de->td_node == fnode); 940170808Sdelphij 941171070Sdelphij /* If re-naming a directory to another preexisting directory 942170808Sdelphij * ensure that the target directory is empty so that its 943171070Sdelphij * removal causes no side effects. 944170808Sdelphij * Kern_rename gurantees the destination to be a directory 945170808Sdelphij * if the source is one. */ 946170808Sdelphij if (tvp != NULL) { 947171799Sdelphij MPASS(tnode != NULL); 948171070Sdelphij 949170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 950170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 951170808Sdelphij error = EPERM; 952170808Sdelphij goto out; 953170808Sdelphij } 954170808Sdelphij 955171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 956171799Sdelphij if (tnode->tn_size > 0) { 957171799Sdelphij error = ENOTEMPTY; 958171799Sdelphij goto out; 959171799Sdelphij } 960171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 961171799Sdelphij error = ENOTDIR; 962170808Sdelphij goto out; 963171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 964171799Sdelphij error = EISDIR; 965171799Sdelphij goto out; 966171799Sdelphij } else { 967171799Sdelphij MPASS(fnode->tn_type != VDIR && 968171799Sdelphij tnode->tn_type != VDIR); 969170808Sdelphij } 970170808Sdelphij } 971170808Sdelphij 972170808Sdelphij /* If we need to move the directory between entries, lock the 973170808Sdelphij * source so that we can safely operate on it. */ 974170808Sdelphij if (fdnode != tdnode) { 975170808Sdelphij error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 976170808Sdelphij if (error != 0) 977170808Sdelphij goto out; 978170808Sdelphij } 979170808Sdelphij 980170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 981170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 982170808Sdelphij error = EPERM; 983170808Sdelphij goto out_locked; 984170808Sdelphij } 985170808Sdelphij 986170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 987170808Sdelphij * has to be changed. */ 988170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 989170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 990171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 991170808Sdelphij } else 992170808Sdelphij newname = NULL; 993170808Sdelphij 994170808Sdelphij /* If the node is being moved to another directory, we have to do 995170808Sdelphij * the move. */ 996170808Sdelphij if (fdnode != tdnode) { 997170808Sdelphij /* In case we are moving a directory, we have to adjust its 998170808Sdelphij * parent to point to the new parent. */ 999170808Sdelphij if (de->td_node->tn_type == VDIR) { 1000170808Sdelphij struct tmpfs_node *n; 1001170808Sdelphij 1002170808Sdelphij /* Ensure the target directory is not a child of the 1003170808Sdelphij * directory being moved. Otherwise, we'd end up 1004170808Sdelphij * with stale nodes. */ 1005170808Sdelphij n = tdnode; 1006170808Sdelphij while (n != n->tn_dir.tn_parent) { 1007170808Sdelphij if (n == fnode) { 1008170808Sdelphij error = EINVAL; 1009170808Sdelphij if (newname != NULL) 1010171087Sdelphij free(newname, M_TMPFSNAME); 1011170808Sdelphij goto out_locked; 1012170808Sdelphij } 1013170808Sdelphij n = n->tn_dir.tn_parent; 1014170808Sdelphij } 1015170808Sdelphij 1016170808Sdelphij /* Adjust the parent pointer. */ 1017170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1018170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1019170808Sdelphij 1020170808Sdelphij /* As a result of changing the target of the '..' 1021170808Sdelphij * entry, the link count of the source and target 1022170808Sdelphij * directories has to be adjusted. */ 1023170808Sdelphij fdnode->tn_links--; 1024170808Sdelphij tdnode->tn_links++; 1025170808Sdelphij } 1026170808Sdelphij 1027170808Sdelphij /* Do the move: just remove the entry from the source directory 1028170808Sdelphij * and insert it into the target one. */ 1029170808Sdelphij tmpfs_dir_detach(fdvp, de); 1030170808Sdelphij tmpfs_dir_attach(tdvp, de); 1031170808Sdelphij } 1032170808Sdelphij 1033170808Sdelphij /* If the name has changed, we need to make it effective by changing 1034170808Sdelphij * it in the directory entry. */ 1035170808Sdelphij if (newname != NULL) { 1036170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1037170808Sdelphij 1038171087Sdelphij free(de->td_name, M_TMPFSNAME); 1039170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1040170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1041170808Sdelphij de->td_name = newname; 1042170808Sdelphij 1043170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1044170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1045170808Sdelphij } 1046170808Sdelphij 1047170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1048170808Sdelphij * from the target directory. */ 1049170808Sdelphij if (tvp != NULL) { 1050170808Sdelphij /* Remove the old entry from the target directory. */ 1051170808Sdelphij de = tnode->tn_lookup_dirent; 1052170808Sdelphij tmpfs_dir_detach(tdvp, de); 1053170808Sdelphij 1054170808Sdelphij /* Free the directory entry we just deleted. Note that the 1055170808Sdelphij * node referred by it will not be removed until the vnode is 1056170808Sdelphij * really reclaimed. */ 1057170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1058170808Sdelphij } 1059170808Sdelphij 1060170808Sdelphij error = 0; 1061170808Sdelphij 1062170808Sdelphijout_locked: 1063170808Sdelphij if (fdnode != tdnode) 1064170808Sdelphij VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 1065170808Sdelphij 1066170808Sdelphijout: 1067170808Sdelphij /* Release target nodes. */ 1068170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1069170808Sdelphij * other code takes care of this... */ 1070170808Sdelphij if (tdvp == tvp) 1071170808Sdelphij vrele(tdvp); 1072170808Sdelphij else 1073170808Sdelphij vput(tdvp); 1074170808Sdelphij if (tvp != NULL) 1075170808Sdelphij vput(tvp); 1076170808Sdelphij 1077170808Sdelphij /* Release source nodes. */ 1078170808Sdelphij vrele(fdvp); 1079170808Sdelphij vrele(fvp); 1080170808Sdelphij 1081170808Sdelphij return error; 1082170808Sdelphij} 1083170808Sdelphij 1084170808Sdelphij/* --------------------------------------------------------------------- */ 1085170808Sdelphij 1086171069Sdelphijstatic int 1087170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1088170808Sdelphij{ 1089170808Sdelphij struct vnode *dvp = v->a_dvp; 1090170808Sdelphij struct vnode **vpp = v->a_vpp; 1091170808Sdelphij struct componentname *cnp = v->a_cnp; 1092170808Sdelphij struct vattr *vap = v->a_vap; 1093170808Sdelphij 1094170808Sdelphij MPASS(vap->va_type == VDIR); 1095170808Sdelphij 1096170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1097170808Sdelphij} 1098170808Sdelphij 1099170808Sdelphij/* --------------------------------------------------------------------- */ 1100170808Sdelphij 1101171069Sdelphijstatic int 1102170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1103170808Sdelphij{ 1104170808Sdelphij struct vnode *dvp = v->a_dvp; 1105170808Sdelphij struct vnode *vp = v->a_vp; 1106170808Sdelphij 1107170808Sdelphij int error; 1108170808Sdelphij struct tmpfs_dirent *de; 1109170808Sdelphij struct tmpfs_mount *tmp; 1110170808Sdelphij struct tmpfs_node *dnode; 1111170808Sdelphij struct tmpfs_node *node; 1112170808Sdelphij 1113170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 1114170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 1115170808Sdelphij 1116170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1117170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1118170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1119170808Sdelphij 1120171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1121171070Sdelphij * removed. */ 1122171070Sdelphij if (node->tn_size > 0) { 1123171070Sdelphij error = ENOTEMPTY; 1124171070Sdelphij goto out; 1125171070Sdelphij } 1126170808Sdelphij 1127170808Sdelphij if ((dnode->tn_flags & APPEND) 1128170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1129170808Sdelphij error = EPERM; 1130170808Sdelphij goto out; 1131170808Sdelphij } 1132170808Sdelphij 1133171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1134171070Sdelphij * We checked for that above so this is safe now. */ 1135170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1136170808Sdelphij 1137170808Sdelphij /* Get the directory entry associated with node (vp). This was 1138170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1139170808Sdelphij de = node->tn_lookup_dirent; 1140170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1141170808Sdelphij v->a_cnp->cn_nameptr, 1142170808Sdelphij v->a_cnp->cn_namelen)); 1143170808Sdelphij 1144170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1145170808Sdelphij if (dnode->tn_flags & APPEND 1146170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1147170808Sdelphij error = EPERM; 1148170808Sdelphij goto out; 1149170808Sdelphij } 1150170808Sdelphij 1151170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1152170808Sdelphij tmpfs_dir_detach(dvp, de); 1153170808Sdelphij 1154170808Sdelphij node->tn_links--; 1155170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1156170808Sdelphij TMPFS_NODE_MODIFIED; 1157170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1158170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1159170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1160170808Sdelphij 1161171070Sdelphij cache_purge(dvp); 1162170808Sdelphij cache_purge(vp); 1163170808Sdelphij 1164170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1165170808Sdelphij * referred by it will not be removed until the vnode is really 1166170808Sdelphij * reclaimed. */ 1167170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1168170808Sdelphij 1169170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1170170808Sdelphij * interested parties and clean it from the cache). */ 1171170808Sdelphij 1172170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1173170808Sdelphij tmpfs_update(dvp); 1174170808Sdelphij 1175170808Sdelphij error = 0; 1176170808Sdelphij 1177170808Sdelphijout: 1178170808Sdelphij return error; 1179170808Sdelphij} 1180170808Sdelphij 1181170808Sdelphij/* --------------------------------------------------------------------- */ 1182170808Sdelphij 1183171069Sdelphijstatic int 1184170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1185170808Sdelphij{ 1186170808Sdelphij struct vnode *dvp = v->a_dvp; 1187170808Sdelphij struct vnode **vpp = v->a_vpp; 1188170808Sdelphij struct componentname *cnp = v->a_cnp; 1189170808Sdelphij struct vattr *vap = v->a_vap; 1190170808Sdelphij char *target = v->a_target; 1191170808Sdelphij 1192170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1193170808Sdelphij MPASS(vap->va_type == VLNK); 1194170808Sdelphij#else 1195170808Sdelphij vap->va_type = VLNK; 1196170808Sdelphij#endif 1197170808Sdelphij 1198170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1199170808Sdelphij} 1200170808Sdelphij 1201170808Sdelphij/* --------------------------------------------------------------------- */ 1202170808Sdelphij 1203171069Sdelphijstatic int 1204170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1205170808Sdelphij{ 1206170808Sdelphij struct vnode *vp = v->a_vp; 1207170808Sdelphij struct uio *uio = v->a_uio; 1208170808Sdelphij int *eofflag = v->a_eofflag; 1209170808Sdelphij u_long **cookies = v->a_cookies; 1210170808Sdelphij int *ncookies = v->a_ncookies; 1211170808Sdelphij 1212170808Sdelphij int error; 1213170808Sdelphij off_t startoff; 1214170808Sdelphij off_t cnt; 1215170808Sdelphij struct tmpfs_node *node; 1216170808Sdelphij 1217170808Sdelphij /* This operation only makes sense on directory nodes. */ 1218170808Sdelphij if (vp->v_type != VDIR) { 1219170808Sdelphij error = ENOTDIR; 1220170808Sdelphij goto out; 1221170808Sdelphij } 1222170808Sdelphij 1223170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1224170808Sdelphij 1225170808Sdelphij startoff = uio->uio_offset; 1226170808Sdelphij 1227170808Sdelphij cnt = 0; 1228170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1229170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1230170808Sdelphij if (error == -1) { 1231170808Sdelphij error = 0; 1232170808Sdelphij goto outok; 1233170808Sdelphij } else if (error != 0) 1234170808Sdelphij goto outok; 1235170808Sdelphij cnt++; 1236170808Sdelphij } 1237170808Sdelphij 1238170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1239170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1240170808Sdelphij if (error == -1) { 1241170808Sdelphij error = 0; 1242170808Sdelphij goto outok; 1243170808Sdelphij } else if (error != 0) 1244170808Sdelphij goto outok; 1245170808Sdelphij cnt++; 1246170808Sdelphij } 1247170808Sdelphij 1248170808Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1249170808Sdelphij if (error == -1) 1250170808Sdelphij error = 0; 1251170808Sdelphij MPASS(error >= 0); 1252170808Sdelphij 1253170808Sdelphijoutok: 1254170808Sdelphij /* This label assumes that startoff has been 1255170808Sdelphij * initialized. If the compiler didn't spit out warnings, we'd 1256170808Sdelphij * simply make this one be 'out' and drop 'outok'. */ 1257170808Sdelphij 1258170808Sdelphij if (eofflag != NULL) 1259170808Sdelphij *eofflag = 1260170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1261170808Sdelphij 1262170808Sdelphij /* Update NFS-related variables. */ 1263170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1264170808Sdelphij off_t i; 1265170808Sdelphij off_t off = startoff; 1266170808Sdelphij struct tmpfs_dirent *de = NULL; 1267170808Sdelphij 1268170808Sdelphij *ncookies = cnt; 1269170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1270170808Sdelphij 1271170808Sdelphij for (i = 0; i < cnt; i++) { 1272170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1273170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1274170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1275170808Sdelphij } else { 1276170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1277170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1278170808Sdelphij } else if (de != NULL) { 1279170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1280170808Sdelphij } else { 1281170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1282170808Sdelphij off); 1283170808Sdelphij MPASS(de != NULL); 1284170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1285170808Sdelphij } 1286170808Sdelphij if (de == NULL) { 1287170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1288170808Sdelphij } else { 1289170808Sdelphij off = TMPFS_DIRCOOKIE(de); 1290170808Sdelphij } 1291170808Sdelphij } 1292170808Sdelphij 1293170808Sdelphij (*cookies)[i] = off; 1294170808Sdelphij } 1295170808Sdelphij MPASS(uio->uio_offset == off); 1296170808Sdelphij } 1297170808Sdelphij 1298170808Sdelphijout: 1299170808Sdelphij return error; 1300170808Sdelphij} 1301170808Sdelphij 1302170808Sdelphij/* --------------------------------------------------------------------- */ 1303170808Sdelphij 1304171069Sdelphijstatic int 1305170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1306170808Sdelphij{ 1307170808Sdelphij struct vnode *vp = v->a_vp; 1308170808Sdelphij struct uio *uio = v->a_uio; 1309170808Sdelphij 1310170808Sdelphij int error; 1311170808Sdelphij struct tmpfs_node *node; 1312170808Sdelphij 1313170808Sdelphij MPASS(uio->uio_offset == 0); 1314170808Sdelphij MPASS(vp->v_type == VLNK); 1315170808Sdelphij 1316170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1317170808Sdelphij 1318170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1319170808Sdelphij uio); 1320170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1321170808Sdelphij 1322170808Sdelphij return error; 1323170808Sdelphij} 1324170808Sdelphij 1325170808Sdelphij/* --------------------------------------------------------------------- */ 1326170808Sdelphij 1327171069Sdelphijstatic int 1328170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1329170808Sdelphij{ 1330170808Sdelphij struct vnode *vp = v->a_vp; 1331170808Sdelphij struct thread *l = v->a_td; 1332170808Sdelphij 1333170808Sdelphij struct tmpfs_node *node; 1334170808Sdelphij 1335170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 1336170808Sdelphij 1337170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1338170808Sdelphij 1339170808Sdelphij if (node->tn_links == 0) 1340170808Sdelphij vrecycle(vp, l); 1341170808Sdelphij 1342170808Sdelphij return 0; 1343170808Sdelphij} 1344170808Sdelphij 1345170808Sdelphij/* --------------------------------------------------------------------- */ 1346170808Sdelphij 1347170808Sdelphijint 1348170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1349170808Sdelphij{ 1350170808Sdelphij struct vnode *vp = v->a_vp; 1351170808Sdelphij 1352170808Sdelphij struct tmpfs_mount *tmp; 1353170808Sdelphij struct tmpfs_node *node; 1354170808Sdelphij 1355170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1356170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1357171070Sdelphij 1358170808Sdelphij vnode_destroy_vobject(vp); 1359170808Sdelphij cache_purge(vp); 1360170808Sdelphij tmpfs_free_vp(vp); 1361170808Sdelphij 1362170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1363170808Sdelphij * we must free its associated data structures (now that the vnode 1364170808Sdelphij * is being reclaimed). */ 1365170808Sdelphij if (node->tn_links == 0) 1366170808Sdelphij tmpfs_free_node(tmp, node); 1367170808Sdelphij 1368170808Sdelphij MPASS(vp->v_data == NULL); 1369170808Sdelphij return 0; 1370170808Sdelphij} 1371170808Sdelphij 1372170808Sdelphij/* --------------------------------------------------------------------- */ 1373170808Sdelphij 1374171069Sdelphijstatic int 1375170808Sdelphijtmpfs_print(struct vop_print_args *v) 1376170808Sdelphij{ 1377170808Sdelphij struct vnode *vp = v->a_vp; 1378170808Sdelphij 1379170808Sdelphij struct tmpfs_node *node; 1380170808Sdelphij 1381170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1382170808Sdelphij 1383170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1384170808Sdelphij node, node->tn_flags, node->tn_links); 1385170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1386170808Sdelphij ", status 0x%x\n", 1387170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1388170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1389170808Sdelphij 1390170808Sdelphij if (vp->v_type == VFIFO) 1391170808Sdelphij fifo_printinfo(vp); 1392170808Sdelphij 1393170808Sdelphij printf("\n"); 1394170808Sdelphij 1395170808Sdelphij return 0; 1396170808Sdelphij} 1397170808Sdelphij 1398170808Sdelphij/* --------------------------------------------------------------------- */ 1399170808Sdelphij 1400171069Sdelphijstatic int 1401170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1402170808Sdelphij{ 1403170808Sdelphij int name = v->a_name; 1404170808Sdelphij register_t *retval = v->a_retval; 1405170808Sdelphij 1406170808Sdelphij int error; 1407170808Sdelphij 1408170808Sdelphij error = 0; 1409170808Sdelphij 1410170808Sdelphij switch (name) { 1411170808Sdelphij case _PC_LINK_MAX: 1412170808Sdelphij *retval = LINK_MAX; 1413170808Sdelphij break; 1414170808Sdelphij 1415170808Sdelphij case _PC_NAME_MAX: 1416170808Sdelphij *retval = NAME_MAX; 1417170808Sdelphij break; 1418170808Sdelphij 1419170808Sdelphij case _PC_PATH_MAX: 1420170808Sdelphij *retval = PATH_MAX; 1421170808Sdelphij break; 1422170808Sdelphij 1423170808Sdelphij case _PC_PIPE_BUF: 1424170808Sdelphij *retval = PIPE_BUF; 1425170808Sdelphij break; 1426170808Sdelphij 1427170808Sdelphij case _PC_CHOWN_RESTRICTED: 1428170808Sdelphij *retval = 1; 1429170808Sdelphij break; 1430170808Sdelphij 1431170808Sdelphij case _PC_NO_TRUNC: 1432170808Sdelphij *retval = 1; 1433170808Sdelphij break; 1434170808Sdelphij 1435170808Sdelphij case _PC_SYNC_IO: 1436170808Sdelphij *retval = 1; 1437170808Sdelphij break; 1438170808Sdelphij 1439170808Sdelphij case _PC_FILESIZEBITS: 1440170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1441170808Sdelphij break; 1442170808Sdelphij 1443170808Sdelphij default: 1444170808Sdelphij error = EINVAL; 1445170808Sdelphij } 1446170808Sdelphij 1447170808Sdelphij return error; 1448170808Sdelphij} 1449170808Sdelphij 1450170808Sdelphij/* --------------------------------------------------------------------- */ 1451170808Sdelphij 1452171069Sdelphijstatic int 1453170808Sdelphijtmpfs_advlock(struct vop_advlock_args *v) 1454170808Sdelphij{ 1455170808Sdelphij struct vnode *vp = v->a_vp; 1456170808Sdelphij 1457170808Sdelphij struct tmpfs_node *node; 1458170808Sdelphij 1459170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1460170808Sdelphij 1461170808Sdelphij return lf_advlock(v, &node->tn_lockf, node->tn_size); 1462170808Sdelphij} 1463170808Sdelphij 1464170808Sdelphij/* --------------------------------------------------------------------- */ 1465170808Sdelphij 1466171069Sdelphijstatic int 1467170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1468170808Sdelphij{ 1469170808Sdelphij struct tmpfs_fid *tfhp; 1470170808Sdelphij struct tmpfs_node *node; 1471170808Sdelphij 1472170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1473170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1474170808Sdelphij 1475170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1476170808Sdelphij tfhp->tf_id = node->tn_id; 1477170808Sdelphij tfhp->tf_gen = node->tn_gen; 1478171070Sdelphij 1479170808Sdelphij return (0); 1480170808Sdelphij} 1481171069Sdelphij 1482171069Sdelphij/* --------------------------------------------------------------------- */ 1483171069Sdelphij 1484171069Sdelphij/* 1485171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1486171069Sdelphij */ 1487171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1488171069Sdelphij .vop_default = &default_vnodeops, 1489171069Sdelphij .vop_lookup = vfs_cache_lookup, 1490171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1491171069Sdelphij .vop_create = tmpfs_create, 1492171069Sdelphij .vop_mknod = tmpfs_mknod, 1493171069Sdelphij .vop_open = tmpfs_open, 1494171069Sdelphij .vop_close = tmpfs_close, 1495171069Sdelphij .vop_access = tmpfs_access, 1496171069Sdelphij .vop_getattr = tmpfs_getattr, 1497171069Sdelphij .vop_setattr = tmpfs_setattr, 1498171069Sdelphij .vop_read = tmpfs_read, 1499171069Sdelphij .vop_write = tmpfs_write, 1500171069Sdelphij .vop_fsync = tmpfs_fsync, 1501171069Sdelphij .vop_remove = tmpfs_remove, 1502171069Sdelphij .vop_link = tmpfs_link, 1503171069Sdelphij .vop_rename = tmpfs_rename, 1504171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1505171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1506171069Sdelphij .vop_symlink = tmpfs_symlink, 1507171069Sdelphij .vop_readdir = tmpfs_readdir, 1508171069Sdelphij .vop_readlink = tmpfs_readlink, 1509171069Sdelphij .vop_inactive = tmpfs_inactive, 1510171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1511171069Sdelphij .vop_print = tmpfs_print, 1512171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1513171069Sdelphij .vop_advlock = tmpfs_advlock, 1514171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1515171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1516171069Sdelphij}; 1517171069Sdelphij 1518