tmpfs_vnops.c revision 207573
1171802Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2170808Sdelphij 3182739Sdelphij/*- 4171802Sdelphij * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 20170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 31170808Sdelphij */ 32170808Sdelphij 33170808Sdelphij/* 34170808Sdelphij * tmpfs vnode interface. 35170808Sdelphij */ 36170808Sdelphij#include <sys/cdefs.h> 37170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 207573 2010-05-03 16:41:11Z alc $"); 38170808Sdelphij 39170808Sdelphij#include <sys/param.h> 40170808Sdelphij#include <sys/fcntl.h> 41170808Sdelphij#include <sys/lockf.h> 42170808Sdelphij#include <sys/namei.h> 43170808Sdelphij#include <sys/priv.h> 44170808Sdelphij#include <sys/proc.h> 45170808Sdelphij#include <sys/resourcevar.h> 46197850Sdelphij#include <sys/sched.h> 47197850Sdelphij#include <sys/sf_buf.h> 48170808Sdelphij#include <sys/stat.h> 49170808Sdelphij#include <sys/systm.h> 50170808Sdelphij#include <sys/unistd.h> 51170808Sdelphij#include <sys/vnode.h> 52170808Sdelphij 53170808Sdelphij#include <vm/vm.h> 54170808Sdelphij#include <vm/vm_object.h> 55170808Sdelphij#include <vm/vm_page.h> 56170808Sdelphij#include <vm/vm_pager.h> 57188929Salc 58170808Sdelphij#include <machine/_inttypes.h> 59170808Sdelphij 60170808Sdelphij#include <fs/fifofs/fifo.h> 61170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 62170808Sdelphij#include <fs/tmpfs/tmpfs.h> 63170808Sdelphij 64170808Sdelphij/* --------------------------------------------------------------------- */ 65170808Sdelphij 66171069Sdelphijstatic int 67170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 68170808Sdelphij{ 69170808Sdelphij struct vnode *dvp = v->a_dvp; 70170808Sdelphij struct vnode **vpp = v->a_vpp; 71170808Sdelphij struct componentname *cnp = v->a_cnp; 72170808Sdelphij 73170808Sdelphij int error; 74170808Sdelphij struct tmpfs_dirent *de; 75170808Sdelphij struct tmpfs_node *dnode; 76170808Sdelphij 77170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 78170808Sdelphij *vpp = NULLVP; 79170808Sdelphij 80170808Sdelphij /* Check accessibility of requested node as a first step. */ 81191990Sattilio error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_thread); 82170808Sdelphij if (error != 0) 83170808Sdelphij goto out; 84170808Sdelphij 85170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 86170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 87170808Sdelphij dnode->tn_dir.tn_parent == dnode, 88170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 89170808Sdelphij 90197953Sdelphij TMPFS_ASSERT_LOCKED(dnode); 91197953Sdelphij if (dnode->tn_dir.tn_parent == NULL) { 92197953Sdelphij error = ENOENT; 93197953Sdelphij goto out; 94197953Sdelphij } 95170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 96171799Sdelphij int ltype = 0; 97171799Sdelphij 98176559Sattilio ltype = VOP_ISLOCKED(dvp); 99171802Sdelphij vhold(dvp); 100175294Sattilio VOP_UNLOCK(dvp, 0); 101170808Sdelphij /* Allocate a new vnode on the matching entry. */ 102171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 103191990Sattilio cnp->cn_lkflags, vpp); 104170808Sdelphij 105175202Sattilio vn_lock(dvp, ltype | LK_RETRY); 106171802Sdelphij vdrop(dvp); 107170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 108170808Sdelphij VREF(dvp); 109170808Sdelphij *vpp = dvp; 110170808Sdelphij error = 0; 111170808Sdelphij } else { 112188318Skib de = tmpfs_dir_lookup(dnode, NULL, cnp); 113170808Sdelphij if (de == NULL) { 114170808Sdelphij /* The entry was not found in the directory. 115170808Sdelphij * This is OK if we are creating or renaming an 116170808Sdelphij * entry and are working on the last component of 117170808Sdelphij * the path name. */ 118170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 119170808Sdelphij (cnp->cn_nameiop == CREATE || \ 120170808Sdelphij cnp->cn_nameiop == RENAME)) { 121170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 122170808Sdelphij cnp->cn_thread); 123170808Sdelphij if (error != 0) 124170808Sdelphij goto out; 125170808Sdelphij 126170808Sdelphij /* Keep the component name in the buffer for 127170808Sdelphij * future uses. */ 128170808Sdelphij cnp->cn_flags |= SAVENAME; 129170808Sdelphij 130170808Sdelphij error = EJUSTRETURN; 131170808Sdelphij } else 132170808Sdelphij error = ENOENT; 133170808Sdelphij } else { 134170808Sdelphij struct tmpfs_node *tnode; 135170808Sdelphij 136170808Sdelphij /* The entry was found, so get its associated 137170808Sdelphij * tmpfs_node. */ 138170808Sdelphij tnode = de->td_node; 139170808Sdelphij 140170808Sdelphij /* If we are not at the last path component and 141170808Sdelphij * found a non-directory or non-link entry (which 142170808Sdelphij * may itself be pointing to a directory), raise 143170808Sdelphij * an error. */ 144170808Sdelphij if ((tnode->tn_type != VDIR && 145170808Sdelphij tnode->tn_type != VLNK) && 146170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 147170808Sdelphij error = ENOTDIR; 148170808Sdelphij goto out; 149170808Sdelphij } 150170808Sdelphij 151170808Sdelphij /* If we are deleting or renaming the entry, keep 152170808Sdelphij * track of its tmpfs_dirent so that it can be 153170808Sdelphij * easily deleted later. */ 154170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 155170808Sdelphij (cnp->cn_nameiop == DELETE || 156170808Sdelphij cnp->cn_nameiop == RENAME)) { 157170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 158170808Sdelphij cnp->cn_thread); 159170808Sdelphij if (error != 0) 160170808Sdelphij goto out; 161171070Sdelphij 162170808Sdelphij /* Allocate a new vnode on the matching entry. */ 163171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 164191990Sattilio cnp->cn_lkflags, vpp); 165170808Sdelphij if (error != 0) 166170808Sdelphij goto out; 167170808Sdelphij 168170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 169170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 170170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 171170808Sdelphij error = EPERM; 172170808Sdelphij vput(*vpp); 173170808Sdelphij *vpp = NULL; 174170808Sdelphij goto out; 175171070Sdelphij } 176170808Sdelphij cnp->cn_flags |= SAVENAME; 177171799Sdelphij } else { 178171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 179191990Sattilio cnp->cn_lkflags, vpp); 180170808Sdelphij } 181170808Sdelphij } 182170808Sdelphij } 183170808Sdelphij 184170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 185170808Sdelphij * request was for creation, as it does not improve timings on 186170808Sdelphij * emprical tests. */ 187170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 188170808Sdelphij cache_enter(dvp, *vpp, cnp); 189170808Sdelphij 190170808Sdelphijout: 191170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 192170808Sdelphij * locked. */ 193176559Sattilio MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 194170808Sdelphij 195170808Sdelphij return error; 196170808Sdelphij} 197170808Sdelphij 198170808Sdelphij/* --------------------------------------------------------------------- */ 199170808Sdelphij 200171069Sdelphijstatic int 201170808Sdelphijtmpfs_create(struct vop_create_args *v) 202170808Sdelphij{ 203170808Sdelphij struct vnode *dvp = v->a_dvp; 204170808Sdelphij struct vnode **vpp = v->a_vpp; 205170808Sdelphij struct componentname *cnp = v->a_cnp; 206170808Sdelphij struct vattr *vap = v->a_vap; 207170808Sdelphij 208170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 209170808Sdelphij 210170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 211170808Sdelphij} 212170808Sdelphij/* --------------------------------------------------------------------- */ 213170808Sdelphij 214171069Sdelphijstatic int 215170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 216170808Sdelphij{ 217170808Sdelphij struct vnode *dvp = v->a_dvp; 218170808Sdelphij struct vnode **vpp = v->a_vpp; 219170808Sdelphij struct componentname *cnp = v->a_cnp; 220170808Sdelphij struct vattr *vap = v->a_vap; 221170808Sdelphij 222170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 223170808Sdelphij vap->va_type != VFIFO) 224170808Sdelphij return EINVAL; 225170808Sdelphij 226170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 227170808Sdelphij} 228170808Sdelphij 229170808Sdelphij/* --------------------------------------------------------------------- */ 230170808Sdelphij 231171069Sdelphijstatic int 232170808Sdelphijtmpfs_open(struct vop_open_args *v) 233170808Sdelphij{ 234170808Sdelphij struct vnode *vp = v->a_vp; 235170808Sdelphij int mode = v->a_mode; 236170808Sdelphij 237170808Sdelphij int error; 238170808Sdelphij struct tmpfs_node *node; 239170808Sdelphij 240176559Sattilio MPASS(VOP_ISLOCKED(vp)); 241170808Sdelphij 242170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 243171070Sdelphij 244170808Sdelphij /* The file is still active but all its names have been removed 245170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 246170808Sdelphij * it is about to die. */ 247170808Sdelphij if (node->tn_links < 1) 248170808Sdelphij return (ENOENT); 249170808Sdelphij 250170808Sdelphij /* If the file is marked append-only, deny write requests. */ 251170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 252170808Sdelphij error = EPERM; 253170808Sdelphij else { 254170808Sdelphij error = 0; 255171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 256170808Sdelphij } 257170808Sdelphij 258176559Sattilio MPASS(VOP_ISLOCKED(vp)); 259170808Sdelphij return error; 260170808Sdelphij} 261170808Sdelphij 262170808Sdelphij/* --------------------------------------------------------------------- */ 263170808Sdelphij 264171069Sdelphijstatic int 265170808Sdelphijtmpfs_close(struct vop_close_args *v) 266170808Sdelphij{ 267170808Sdelphij struct vnode *vp = v->a_vp; 268170808Sdelphij 269170808Sdelphij struct tmpfs_node *node; 270170808Sdelphij 271176559Sattilio MPASS(VOP_ISLOCKED(vp)); 272170808Sdelphij 273170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 274170808Sdelphij 275170808Sdelphij if (node->tn_links > 0) { 276170808Sdelphij /* Update node times. No need to do it if the node has 277170808Sdelphij * been deleted, because it will vanish after we return. */ 278170808Sdelphij tmpfs_update(vp); 279170808Sdelphij } 280170808Sdelphij 281170808Sdelphij return 0; 282170808Sdelphij} 283170808Sdelphij 284170808Sdelphij/* --------------------------------------------------------------------- */ 285170808Sdelphij 286170808Sdelphijint 287170808Sdelphijtmpfs_access(struct vop_access_args *v) 288170808Sdelphij{ 289170808Sdelphij struct vnode *vp = v->a_vp; 290184413Strasz accmode_t accmode = v->a_accmode; 291170808Sdelphij struct ucred *cred = v->a_cred; 292170808Sdelphij 293170808Sdelphij int error; 294170808Sdelphij struct tmpfs_node *node; 295170808Sdelphij 296176559Sattilio MPASS(VOP_ISLOCKED(vp)); 297170808Sdelphij 298170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 299170808Sdelphij 300170808Sdelphij switch (vp->v_type) { 301170808Sdelphij case VDIR: 302170808Sdelphij /* FALLTHROUGH */ 303170808Sdelphij case VLNK: 304170808Sdelphij /* FALLTHROUGH */ 305170808Sdelphij case VREG: 306184413Strasz if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 307170808Sdelphij error = EROFS; 308170808Sdelphij goto out; 309170808Sdelphij } 310170808Sdelphij break; 311170808Sdelphij 312170808Sdelphij case VBLK: 313170808Sdelphij /* FALLTHROUGH */ 314170808Sdelphij case VCHR: 315170808Sdelphij /* FALLTHROUGH */ 316170808Sdelphij case VSOCK: 317170808Sdelphij /* FALLTHROUGH */ 318170808Sdelphij case VFIFO: 319170808Sdelphij break; 320170808Sdelphij 321170808Sdelphij default: 322170808Sdelphij error = EINVAL; 323170808Sdelphij goto out; 324170808Sdelphij } 325170808Sdelphij 326184413Strasz if (accmode & VWRITE && node->tn_flags & IMMUTABLE) { 327170808Sdelphij error = EPERM; 328170808Sdelphij goto out; 329170808Sdelphij } 330170808Sdelphij 331170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 332184413Strasz node->tn_gid, accmode, cred, NULL); 333170808Sdelphij 334170808Sdelphijout: 335176559Sattilio MPASS(VOP_ISLOCKED(vp)); 336170808Sdelphij 337170808Sdelphij return error; 338170808Sdelphij} 339170808Sdelphij 340170808Sdelphij/* --------------------------------------------------------------------- */ 341170808Sdelphij 342170808Sdelphijint 343170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 344170808Sdelphij{ 345170808Sdelphij struct vnode *vp = v->a_vp; 346170808Sdelphij struct vattr *vap = v->a_vap; 347170808Sdelphij 348170808Sdelphij struct tmpfs_node *node; 349170808Sdelphij 350170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 351170808Sdelphij 352170808Sdelphij tmpfs_update(vp); 353170808Sdelphij 354170808Sdelphij vap->va_type = vp->v_type; 355170808Sdelphij vap->va_mode = node->tn_mode; 356170808Sdelphij vap->va_nlink = node->tn_links; 357170808Sdelphij vap->va_uid = node->tn_uid; 358170808Sdelphij vap->va_gid = node->tn_gid; 359170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 360170808Sdelphij vap->va_fileid = node->tn_id; 361170808Sdelphij vap->va_size = node->tn_size; 362170808Sdelphij vap->va_blocksize = PAGE_SIZE; 363170808Sdelphij vap->va_atime = node->tn_atime; 364170808Sdelphij vap->va_mtime = node->tn_mtime; 365170808Sdelphij vap->va_ctime = node->tn_ctime; 366170808Sdelphij vap->va_birthtime = node->tn_birthtime; 367170808Sdelphij vap->va_gen = node->tn_gen; 368170808Sdelphij vap->va_flags = node->tn_flags; 369170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 370183214Skib node->tn_rdev : NODEV; 371170808Sdelphij vap->va_bytes = round_page(node->tn_size); 372183212Skib vap->va_filerev = 0; 373170808Sdelphij 374170808Sdelphij return 0; 375170808Sdelphij} 376170808Sdelphij 377170808Sdelphij/* --------------------------------------------------------------------- */ 378170808Sdelphij 379170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 380170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 381170808Sdelphijint 382170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 383170808Sdelphij{ 384170808Sdelphij struct vnode *vp = v->a_vp; 385170808Sdelphij struct vattr *vap = v->a_vap; 386170808Sdelphij struct ucred *cred = v->a_cred; 387182371Sattilio struct thread *td = curthread; 388170808Sdelphij 389170808Sdelphij int error; 390170808Sdelphij 391176559Sattilio MPASS(VOP_ISLOCKED(vp)); 392170808Sdelphij 393170808Sdelphij error = 0; 394170808Sdelphij 395170808Sdelphij /* Abort if any unsettable attribute is given. */ 396170808Sdelphij if (vap->va_type != VNON || 397170808Sdelphij vap->va_nlink != VNOVAL || 398170808Sdelphij vap->va_fsid != VNOVAL || 399170808Sdelphij vap->va_fileid != VNOVAL || 400170808Sdelphij vap->va_blocksize != VNOVAL || 401170808Sdelphij vap->va_gen != VNOVAL || 402170808Sdelphij vap->va_rdev != VNOVAL || 403170808Sdelphij vap->va_bytes != VNOVAL) 404170808Sdelphij error = EINVAL; 405170808Sdelphij 406170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 407182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 408170808Sdelphij 409170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 410182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 411170808Sdelphij 412170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 413182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 414170808Sdelphij 415170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 416182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 417170808Sdelphij 418170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 419170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 420170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 421170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 422170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 423170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 424171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 425182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 426170808Sdelphij 427170808Sdelphij /* Update the node times. We give preference to the error codes 428170808Sdelphij * generated by this function rather than the ones that may arise 429170808Sdelphij * from tmpfs_update. */ 430170808Sdelphij tmpfs_update(vp); 431170808Sdelphij 432176559Sattilio MPASS(VOP_ISLOCKED(vp)); 433170808Sdelphij 434170808Sdelphij return error; 435170808Sdelphij} 436170808Sdelphij 437170808Sdelphij/* --------------------------------------------------------------------- */ 438197850Sdelphijstatic int 439197850Sdelphijtmpfs_nocacheread(vm_object_t tobj, vm_pindex_t idx, 440197850Sdelphij vm_offset_t offset, size_t tlen, struct uio *uio) 441197850Sdelphij{ 442197850Sdelphij vm_page_t m; 443197850Sdelphij int error; 444171489Sdelphij 445197850Sdelphij VM_OBJECT_LOCK(tobj); 446197850Sdelphij vm_object_pip_add(tobj, 1); 447197850Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 448197850Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 449197850Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 450197850Sdelphij if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 451197850Sdelphij error = vm_pager_get_pages(tobj, &m, 1, 0); 452197850Sdelphij if (error != 0) { 453197850Sdelphij printf("tmpfs get pages from pager error [read]\n"); 454197850Sdelphij goto out; 455197850Sdelphij } 456197850Sdelphij } else 457197850Sdelphij vm_page_zero_invalid(m, TRUE); 458197850Sdelphij } 459197850Sdelphij VM_OBJECT_UNLOCK(tobj); 460197850Sdelphij error = uiomove_fromphys(&m, offset, tlen, uio); 461197850Sdelphij VM_OBJECT_LOCK(tobj); 462197850Sdelphijout: 463207573Salc vm_page_lock(m); 464197850Sdelphij vm_page_lock_queues(); 465197850Sdelphij vm_page_unwire(m, TRUE); 466197850Sdelphij vm_page_unlock_queues(); 467207573Salc vm_page_unlock(m); 468197850Sdelphij vm_page_wakeup(m); 469197850Sdelphij vm_object_pip_subtract(tobj, 1); 470197850Sdelphij VM_OBJECT_UNLOCK(tobj); 471197850Sdelphij 472197850Sdelphij return (error); 473197850Sdelphij} 474197850Sdelphij 475197850Sdelphijstatic __inline int 476197850Sdelphijtmpfs_nocacheread_buf(vm_object_t tobj, vm_pindex_t idx, 477197850Sdelphij vm_offset_t offset, size_t tlen, void *buf) 478197850Sdelphij{ 479197850Sdelphij struct uio uio; 480197850Sdelphij struct iovec iov; 481197850Sdelphij 482197850Sdelphij uio.uio_iovcnt = 1; 483197850Sdelphij uio.uio_iov = &iov; 484197850Sdelphij iov.iov_base = buf; 485197850Sdelphij iov.iov_len = tlen; 486197850Sdelphij 487197850Sdelphij uio.uio_offset = 0; 488197850Sdelphij uio.uio_resid = tlen; 489197850Sdelphij uio.uio_rw = UIO_READ; 490197850Sdelphij uio.uio_segflg = UIO_SYSSPACE; 491197850Sdelphij uio.uio_td = curthread; 492197850Sdelphij 493197850Sdelphij return (tmpfs_nocacheread(tobj, idx, offset, tlen, &uio)); 494197850Sdelphij} 495197850Sdelphij 496170808Sdelphijstatic int 497171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 498170808Sdelphij{ 499197850Sdelphij struct sf_buf *sf; 500171489Sdelphij vm_pindex_t idx; 501171489Sdelphij vm_page_t m; 502188929Salc vm_offset_t offset; 503188929Salc off_t addr; 504171489Sdelphij size_t tlen; 505197850Sdelphij char *ma; 506171489Sdelphij int error; 507170808Sdelphij 508171489Sdelphij addr = uio->uio_offset; 509171489Sdelphij idx = OFF_TO_IDX(addr); 510171489Sdelphij offset = addr & PAGE_MASK; 511171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 512170808Sdelphij 513197740Sdelphij if ((vobj == NULL) || 514197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) 515171489Sdelphij goto nocache; 516170808Sdelphij 517171489Sdelphij VM_OBJECT_LOCK(vobj); 518171489Sdelphijlookupvpg: 519171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 520171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 521207530Salc if ((m->oflags & VPO_BUSY) != 0) { 522207530Salc /* 523207530Salc * Reference the page before unlocking and sleeping so 524207530Salc * that the page daemon is less likely to reclaim it. 525207530Salc */ 526207530Salc vm_page_lock_queues(); 527207530Salc vm_page_flag_set(m, PG_REFERENCED); 528207530Salc vm_page_sleep(m, "tmfsmr"); 529171489Sdelphij goto lookupvpg; 530207530Salc } 531171489Sdelphij vm_page_busy(m); 532171489Sdelphij VM_OBJECT_UNLOCK(vobj); 533188929Salc error = uiomove_fromphys(&m, offset, tlen, uio); 534171489Sdelphij VM_OBJECT_LOCK(vobj); 535171489Sdelphij vm_page_wakeup(m); 536171489Sdelphij VM_OBJECT_UNLOCK(vobj); 537171489Sdelphij return (error); 538197850Sdelphij } else if (m != NULL && uio->uio_segflg == UIO_NOCOPY) { 539207530Salc if ((m->oflags & VPO_BUSY) != 0) { 540207530Salc /* 541207530Salc * Reference the page before unlocking and sleeping so 542207530Salc * that the page daemon is less likely to reclaim it. 543207530Salc */ 544207530Salc vm_page_lock_queues(); 545207530Salc vm_page_flag_set(m, PG_REFERENCED); 546207530Salc vm_page_sleep(m, "tmfsmr"); 547197850Sdelphij goto lookupvpg; 548207530Salc } 549197850Sdelphij vm_page_busy(m); 550197850Sdelphij VM_OBJECT_UNLOCK(vobj); 551197850Sdelphij sched_pin(); 552197850Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 553197850Sdelphij ma = (char *)sf_buf_kva(sf); 554197850Sdelphij error = tmpfs_nocacheread_buf(tobj, idx, offset, tlen, 555197850Sdelphij ma + offset); 556197850Sdelphij if (error == 0) { 557197850Sdelphij uio->uio_offset += tlen; 558197850Sdelphij uio->uio_resid -= tlen; 559197850Sdelphij } 560197850Sdelphij sf_buf_free(sf); 561197850Sdelphij sched_unpin(); 562197850Sdelphij VM_OBJECT_LOCK(vobj); 563197850Sdelphij vm_page_wakeup(m); 564197850Sdelphij VM_OBJECT_UNLOCK(vobj); 565197850Sdelphij return (error); 566171799Sdelphij } 567171489Sdelphij VM_OBJECT_UNLOCK(vobj); 568171489Sdelphijnocache: 569197850Sdelphij error = tmpfs_nocacheread(tobj, idx, offset, tlen, uio); 570171489Sdelphij 571171489Sdelphij return (error); 572170808Sdelphij} 573170808Sdelphij 574171069Sdelphijstatic int 575170808Sdelphijtmpfs_read(struct vop_read_args *v) 576170808Sdelphij{ 577170808Sdelphij struct vnode *vp = v->a_vp; 578170808Sdelphij struct uio *uio = v->a_uio; 579170808Sdelphij 580170808Sdelphij struct tmpfs_node *node; 581170808Sdelphij vm_object_t uobj; 582171489Sdelphij size_t len; 583171489Sdelphij int resid; 584170808Sdelphij 585174265Swkoszek int error = 0; 586170808Sdelphij 587170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 588170808Sdelphij 589170808Sdelphij if (vp->v_type != VREG) { 590170808Sdelphij error = EISDIR; 591170808Sdelphij goto out; 592170808Sdelphij } 593170808Sdelphij 594170808Sdelphij if (uio->uio_offset < 0) { 595170808Sdelphij error = EINVAL; 596170808Sdelphij goto out; 597170808Sdelphij } 598170808Sdelphij 599170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 600170808Sdelphij 601170808Sdelphij uobj = node->tn_reg.tn_aobj; 602171489Sdelphij while ((resid = uio->uio_resid) > 0) { 603171489Sdelphij error = 0; 604171489Sdelphij if (node->tn_size <= uio->uio_offset) 605171489Sdelphij break; 606171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 607171489Sdelphij if (len == 0) 608171489Sdelphij break; 609171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 610171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 611171489Sdelphij break; 612171489Sdelphij } 613170808Sdelphij 614170808Sdelphijout: 615170808Sdelphij 616170808Sdelphij return error; 617170808Sdelphij} 618170808Sdelphij 619170808Sdelphij/* --------------------------------------------------------------------- */ 620170808Sdelphij 621171069Sdelphijstatic int 622171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 623171489Sdelphij{ 624171489Sdelphij vm_pindex_t idx; 625171489Sdelphij vm_page_t vpg, tpg; 626188929Salc vm_offset_t offset; 627188929Salc off_t addr; 628171489Sdelphij size_t tlen; 629171489Sdelphij int error; 630171489Sdelphij 631174265Swkoszek error = 0; 632174265Swkoszek 633171489Sdelphij addr = uio->uio_offset; 634171489Sdelphij idx = OFF_TO_IDX(addr); 635171489Sdelphij offset = addr & PAGE_MASK; 636171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 637171489Sdelphij 638197740Sdelphij if ((vobj == NULL) || 639197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) { 640171489Sdelphij vpg = NULL; 641171489Sdelphij goto nocache; 642171489Sdelphij } 643171489Sdelphij 644171489Sdelphij VM_OBJECT_LOCK(vobj); 645171489Sdelphijlookupvpg: 646171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 647171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 648207530Salc if ((vpg->oflags & VPO_BUSY) != 0) { 649207530Salc /* 650207530Salc * Reference the page before unlocking and sleeping so 651207530Salc * that the page daemon is less likely to reclaim it. 652207530Salc */ 653207530Salc vm_page_lock_queues(); 654207530Salc vm_page_flag_set(vpg, PG_REFERENCED); 655207530Salc vm_page_sleep(vpg, "tmfsmw"); 656171489Sdelphij goto lookupvpg; 657207530Salc } 658171489Sdelphij vm_page_busy(vpg); 659171489Sdelphij vm_page_lock_queues(); 660171489Sdelphij vm_page_undirty(vpg); 661171489Sdelphij vm_page_unlock_queues(); 662171489Sdelphij VM_OBJECT_UNLOCK(vobj); 663188929Salc error = uiomove_fromphys(&vpg, offset, tlen, uio); 664171489Sdelphij } else { 665197740Sdelphij if (__predict_false(vobj->cache != NULL)) 666197740Sdelphij vm_page_cache_free(vobj, idx, idx + 1); 667171489Sdelphij VM_OBJECT_UNLOCK(vobj); 668171489Sdelphij vpg = NULL; 669171489Sdelphij } 670171489Sdelphijnocache: 671171489Sdelphij VM_OBJECT_LOCK(tobj); 672171489Sdelphij vm_object_pip_add(tobj, 1); 673171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 674171489Sdelphij VM_ALLOC_ZERO | VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 675171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 676194124Salc if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 677171489Sdelphij error = vm_pager_get_pages(tobj, &tpg, 1, 0); 678171489Sdelphij if (error != 0) { 679171489Sdelphij printf("tmpfs get pages from pager error [write]\n"); 680171489Sdelphij goto out; 681171489Sdelphij } 682171489Sdelphij } else 683171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 684171489Sdelphij } 685171489Sdelphij VM_OBJECT_UNLOCK(tobj); 686188929Salc if (vpg == NULL) 687188929Salc error = uiomove_fromphys(&tpg, offset, tlen, uio); 688188929Salc else { 689171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 690171489Sdelphij pmap_copy_page(vpg, tpg); 691171489Sdelphij } 692171489Sdelphij VM_OBJECT_LOCK(tobj); 693171489Sdelphijout: 694171489Sdelphij if (vobj != NULL) 695171489Sdelphij VM_OBJECT_LOCK(vobj); 696207573Salc vm_page_lock(tpg); 697171489Sdelphij vm_page_lock_queues(); 698171489Sdelphij if (error == 0) { 699192917Salc KASSERT(tpg->valid == VM_PAGE_BITS_ALL, 700192917Salc ("parts of tpg invalid")); 701171489Sdelphij vm_page_dirty(tpg); 702171489Sdelphij } 703188921Salc vm_page_unwire(tpg, TRUE); 704171489Sdelphij vm_page_unlock_queues(); 705207573Salc vm_page_unlock(tpg); 706171489Sdelphij vm_page_wakeup(tpg); 707171489Sdelphij if (vpg != NULL) 708171489Sdelphij vm_page_wakeup(vpg); 709171489Sdelphij if (vobj != NULL) 710171489Sdelphij VM_OBJECT_UNLOCK(vobj); 711171489Sdelphij vm_object_pip_subtract(tobj, 1); 712171489Sdelphij VM_OBJECT_UNLOCK(tobj); 713171489Sdelphij 714171489Sdelphij return (error); 715171489Sdelphij} 716171489Sdelphij 717171489Sdelphijstatic int 718170808Sdelphijtmpfs_write(struct vop_write_args *v) 719170808Sdelphij{ 720170808Sdelphij struct vnode *vp = v->a_vp; 721170808Sdelphij struct uio *uio = v->a_uio; 722170808Sdelphij int ioflag = v->a_ioflag; 723170808Sdelphij struct thread *td = uio->uio_td; 724170808Sdelphij 725170808Sdelphij boolean_t extended; 726171489Sdelphij int error = 0; 727170808Sdelphij off_t oldsize; 728170808Sdelphij struct tmpfs_node *node; 729170808Sdelphij vm_object_t uobj; 730171489Sdelphij size_t len; 731171489Sdelphij int resid; 732170808Sdelphij 733170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 734170808Sdelphij oldsize = node->tn_size; 735170808Sdelphij 736170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 737170808Sdelphij error = EINVAL; 738170808Sdelphij goto out; 739170808Sdelphij } 740170808Sdelphij 741170808Sdelphij if (uio->uio_resid == 0) { 742170808Sdelphij error = 0; 743170808Sdelphij goto out; 744170808Sdelphij } 745170808Sdelphij 746170808Sdelphij if (ioflag & IO_APPEND) 747170808Sdelphij uio->uio_offset = node->tn_size; 748171070Sdelphij 749171070Sdelphij if (uio->uio_offset + uio->uio_resid > 750170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 751170808Sdelphij return (EFBIG); 752170808Sdelphij 753170808Sdelphij if (vp->v_type == VREG && td != NULL) { 754170808Sdelphij PROC_LOCK(td->td_proc); 755170808Sdelphij if (uio->uio_offset + uio->uio_resid > 756170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 757170808Sdelphij psignal(td->td_proc, SIGXFSZ); 758170808Sdelphij PROC_UNLOCK(td->td_proc); 759170808Sdelphij return (EFBIG); 760170808Sdelphij } 761170808Sdelphij PROC_UNLOCK(td->td_proc); 762170808Sdelphij } 763170808Sdelphij 764170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 765170808Sdelphij if (extended) { 766170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 767170808Sdelphij if (error != 0) 768170808Sdelphij goto out; 769170808Sdelphij } 770170808Sdelphij 771170808Sdelphij uobj = node->tn_reg.tn_aobj; 772171489Sdelphij while ((resid = uio->uio_resid) > 0) { 773171489Sdelphij if (node->tn_size <= uio->uio_offset) 774171489Sdelphij break; 775171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 776171489Sdelphij if (len == 0) 777171489Sdelphij break; 778171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 779171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 780171489Sdelphij break; 781171489Sdelphij } 782170808Sdelphij 783170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 784170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 785170808Sdelphij 786170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 787170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 788170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 789170808Sdelphij } 790170808Sdelphij 791170808Sdelphij if (error != 0) 792170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 793170808Sdelphij 794170808Sdelphijout: 795170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 796170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 797170808Sdelphij 798170808Sdelphij return error; 799170808Sdelphij} 800170808Sdelphij 801170808Sdelphij/* --------------------------------------------------------------------- */ 802170808Sdelphij 803171069Sdelphijstatic int 804170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 805170808Sdelphij{ 806170808Sdelphij struct vnode *vp = v->a_vp; 807170808Sdelphij 808176559Sattilio MPASS(VOP_ISLOCKED(vp)); 809170808Sdelphij 810170808Sdelphij tmpfs_update(vp); 811170808Sdelphij 812170808Sdelphij return 0; 813170808Sdelphij} 814170808Sdelphij 815170808Sdelphij/* --------------------------------------------------------------------- */ 816170808Sdelphij 817171069Sdelphijstatic int 818170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 819170808Sdelphij{ 820170808Sdelphij struct vnode *dvp = v->a_dvp; 821170808Sdelphij struct vnode *vp = v->a_vp; 822170808Sdelphij 823170808Sdelphij int error; 824170808Sdelphij struct tmpfs_dirent *de; 825170808Sdelphij struct tmpfs_mount *tmp; 826170808Sdelphij struct tmpfs_node *dnode; 827170808Sdelphij struct tmpfs_node *node; 828170808Sdelphij 829176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 830176559Sattilio MPASS(VOP_ISLOCKED(vp)); 831170808Sdelphij 832170808Sdelphij if (vp->v_type == VDIR) { 833170808Sdelphij error = EISDIR; 834170808Sdelphij goto out; 835170808Sdelphij } 836170808Sdelphij 837170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 838170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 839170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 840188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 841170808Sdelphij MPASS(de != NULL); 842170808Sdelphij 843170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 844170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 845170808Sdelphij (dnode->tn_flags & APPEND)) { 846170808Sdelphij error = EPERM; 847170808Sdelphij goto out; 848170808Sdelphij } 849170808Sdelphij 850170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 851170808Sdelphij * have to change the number of hard links of the directory. */ 852170808Sdelphij tmpfs_dir_detach(dvp, de); 853170808Sdelphij 854170808Sdelphij /* Free the directory entry we just deleted. Note that the node 855170808Sdelphij * referred by it will not be removed until the vnode is really 856170808Sdelphij * reclaimed. */ 857170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 858170808Sdelphij 859170808Sdelphij if (node->tn_links > 0) 860170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 861170808Sdelphij TMPFS_NODE_MODIFIED; 862170808Sdelphij error = 0; 863170808Sdelphij 864170808Sdelphijout: 865170808Sdelphij 866170808Sdelphij return error; 867170808Sdelphij} 868170808Sdelphij 869170808Sdelphij/* --------------------------------------------------------------------- */ 870170808Sdelphij 871171069Sdelphijstatic int 872170808Sdelphijtmpfs_link(struct vop_link_args *v) 873170808Sdelphij{ 874170808Sdelphij struct vnode *dvp = v->a_tdvp; 875170808Sdelphij struct vnode *vp = v->a_vp; 876170808Sdelphij struct componentname *cnp = v->a_cnp; 877170808Sdelphij 878170808Sdelphij int error; 879170808Sdelphij struct tmpfs_dirent *de; 880170808Sdelphij struct tmpfs_node *node; 881170808Sdelphij 882176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 883170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 884170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 885170808Sdelphij 886170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 887170808Sdelphij 888170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 889170808Sdelphij 890170808Sdelphij /* Hard links of directories are forbidden. */ 891170808Sdelphij if (vp->v_type == VDIR) { 892170808Sdelphij error = EPERM; 893170808Sdelphij goto out; 894170808Sdelphij } 895170808Sdelphij 896170808Sdelphij /* Cannot create cross-device links. */ 897170808Sdelphij if (dvp->v_mount != vp->v_mount) { 898170808Sdelphij error = EXDEV; 899170808Sdelphij goto out; 900170808Sdelphij } 901170808Sdelphij 902170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 903170808Sdelphij * by the system. */ 904170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 905170808Sdelphij if (node->tn_links == LINK_MAX) { 906170808Sdelphij error = EMLINK; 907170808Sdelphij goto out; 908170808Sdelphij } 909170808Sdelphij 910170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 911170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 912170808Sdelphij error = EPERM; 913170808Sdelphij goto out; 914170808Sdelphij } 915170808Sdelphij 916170808Sdelphij /* Allocate a new directory entry to represent the node. */ 917170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 918170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 919170808Sdelphij if (error != 0) 920170808Sdelphij goto out; 921170808Sdelphij 922170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 923170808Sdelphij tmpfs_dir_attach(dvp, de); 924170808Sdelphij 925170808Sdelphij /* vp link count has changed, so update node times. */ 926170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 927170808Sdelphij tmpfs_update(vp); 928170808Sdelphij 929170808Sdelphij error = 0; 930171070Sdelphij 931170808Sdelphijout: 932170808Sdelphij return error; 933170808Sdelphij} 934170808Sdelphij 935170808Sdelphij/* --------------------------------------------------------------------- */ 936170808Sdelphij 937171069Sdelphijstatic int 938170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 939170808Sdelphij{ 940170808Sdelphij struct vnode *fdvp = v->a_fdvp; 941170808Sdelphij struct vnode *fvp = v->a_fvp; 942170808Sdelphij struct componentname *fcnp = v->a_fcnp; 943170808Sdelphij struct vnode *tdvp = v->a_tdvp; 944170808Sdelphij struct vnode *tvp = v->a_tvp; 945170808Sdelphij struct componentname *tcnp = v->a_tcnp; 946170808Sdelphij 947170808Sdelphij char *newname; 948170808Sdelphij int error; 949170808Sdelphij struct tmpfs_dirent *de; 950197953Sdelphij struct tmpfs_mount *tmp; 951170808Sdelphij struct tmpfs_node *fdnode; 952170808Sdelphij struct tmpfs_node *fnode; 953171799Sdelphij struct tmpfs_node *tnode; 954170808Sdelphij struct tmpfs_node *tdnode; 955170808Sdelphij 956176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 957176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 958170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 959170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 960170808Sdelphij 961171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 962170808Sdelphij 963170808Sdelphij /* Disallow cross-device renames. 964170808Sdelphij * XXX Why isn't this done by the caller? */ 965170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 966170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 967170808Sdelphij error = EXDEV; 968170808Sdelphij goto out; 969170808Sdelphij } 970170808Sdelphij 971197953Sdelphij tmp = VFS_TO_TMPFS(tdvp->v_mount); 972170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 973170808Sdelphij 974170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 975170808Sdelphij if (fvp == tvp) { 976170808Sdelphij error = 0; 977170808Sdelphij goto out; 978170808Sdelphij } 979170808Sdelphij 980173725Sdelphij /* If we need to move the directory between entries, lock the 981173725Sdelphij * source so that we can safely operate on it. */ 982173725Sdelphij if (tdvp != fdvp) { 983175202Sattilio error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 984173725Sdelphij if (error != 0) 985173725Sdelphij goto out; 986173725Sdelphij } 987173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 988173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 989188318Skib de = tmpfs_dir_lookup(fdnode, fnode, fcnp); 990173725Sdelphij 991170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 992170808Sdelphij if (de == NULL) { 993170808Sdelphij MPASS(fvp->v_type == VDIR); 994170808Sdelphij error = EINVAL; 995173725Sdelphij goto out_locked; 996170808Sdelphij } 997170808Sdelphij MPASS(de->td_node == fnode); 998170808Sdelphij 999171070Sdelphij /* If re-naming a directory to another preexisting directory 1000170808Sdelphij * ensure that the target directory is empty so that its 1001171070Sdelphij * removal causes no side effects. 1002170808Sdelphij * Kern_rename gurantees the destination to be a directory 1003170808Sdelphij * if the source is one. */ 1004170808Sdelphij if (tvp != NULL) { 1005171799Sdelphij MPASS(tnode != NULL); 1006171070Sdelphij 1007170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 1008170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 1009170808Sdelphij error = EPERM; 1010173725Sdelphij goto out_locked; 1011170808Sdelphij } 1012170808Sdelphij 1013171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 1014171799Sdelphij if (tnode->tn_size > 0) { 1015171799Sdelphij error = ENOTEMPTY; 1016173725Sdelphij goto out_locked; 1017171799Sdelphij } 1018171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 1019171799Sdelphij error = ENOTDIR; 1020173725Sdelphij goto out_locked; 1021171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 1022171799Sdelphij error = EISDIR; 1023173725Sdelphij goto out_locked; 1024171799Sdelphij } else { 1025171799Sdelphij MPASS(fnode->tn_type != VDIR && 1026171799Sdelphij tnode->tn_type != VDIR); 1027170808Sdelphij } 1028170808Sdelphij } 1029170808Sdelphij 1030170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 1031170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 1032170808Sdelphij error = EPERM; 1033170808Sdelphij goto out_locked; 1034170808Sdelphij } 1035170808Sdelphij 1036170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 1037170808Sdelphij * has to be changed. */ 1038170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 1039183299Sobrien bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 1040171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 1041170808Sdelphij } else 1042170808Sdelphij newname = NULL; 1043170808Sdelphij 1044170808Sdelphij /* If the node is being moved to another directory, we have to do 1045170808Sdelphij * the move. */ 1046170808Sdelphij if (fdnode != tdnode) { 1047170808Sdelphij /* In case we are moving a directory, we have to adjust its 1048170808Sdelphij * parent to point to the new parent. */ 1049170808Sdelphij if (de->td_node->tn_type == VDIR) { 1050170808Sdelphij struct tmpfs_node *n; 1051170808Sdelphij 1052170808Sdelphij /* Ensure the target directory is not a child of the 1053170808Sdelphij * directory being moved. Otherwise, we'd end up 1054170808Sdelphij * with stale nodes. */ 1055170808Sdelphij n = tdnode; 1056197953Sdelphij /* TMPFS_LOCK garanties that no nodes are freed while 1057197953Sdelphij * traversing the list. Nodes can only be marked as 1058197953Sdelphij * removed: tn_parent == NULL. */ 1059197953Sdelphij TMPFS_LOCK(tmp); 1060197953Sdelphij TMPFS_NODE_LOCK(n); 1061170808Sdelphij while (n != n->tn_dir.tn_parent) { 1062197953Sdelphij struct tmpfs_node *parent; 1063197953Sdelphij 1064170808Sdelphij if (n == fnode) { 1065197953Sdelphij TMPFS_NODE_UNLOCK(n); 1066197953Sdelphij TMPFS_UNLOCK(tmp); 1067170808Sdelphij error = EINVAL; 1068170808Sdelphij if (newname != NULL) 1069171087Sdelphij free(newname, M_TMPFSNAME); 1070170808Sdelphij goto out_locked; 1071170808Sdelphij } 1072197953Sdelphij parent = n->tn_dir.tn_parent; 1073197953Sdelphij TMPFS_NODE_UNLOCK(n); 1074197953Sdelphij if (parent == NULL) { 1075197953Sdelphij n = NULL; 1076197953Sdelphij break; 1077197953Sdelphij } 1078197953Sdelphij TMPFS_NODE_LOCK(parent); 1079197953Sdelphij if (parent->tn_dir.tn_parent == NULL) { 1080197953Sdelphij TMPFS_NODE_UNLOCK(parent); 1081197953Sdelphij n = NULL; 1082197953Sdelphij break; 1083197953Sdelphij } 1084197953Sdelphij n = parent; 1085170808Sdelphij } 1086197953Sdelphij TMPFS_UNLOCK(tmp); 1087197953Sdelphij if (n == NULL) { 1088197953Sdelphij error = EINVAL; 1089197953Sdelphij if (newname != NULL) 1090197953Sdelphij free(newname, M_TMPFSNAME); 1091197953Sdelphij goto out_locked; 1092197953Sdelphij } 1093197953Sdelphij TMPFS_NODE_UNLOCK(n); 1094170808Sdelphij 1095170808Sdelphij /* Adjust the parent pointer. */ 1096170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1097197953Sdelphij TMPFS_NODE_LOCK(de->td_node); 1098170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1099197953Sdelphij TMPFS_NODE_UNLOCK(de->td_node); 1100170808Sdelphij 1101170808Sdelphij /* As a result of changing the target of the '..' 1102170808Sdelphij * entry, the link count of the source and target 1103170808Sdelphij * directories has to be adjusted. */ 1104197953Sdelphij TMPFS_NODE_LOCK(tdnode); 1105197953Sdelphij TMPFS_ASSERT_LOCKED(tdnode); 1106197953Sdelphij tdnode->tn_links++; 1107197953Sdelphij TMPFS_NODE_UNLOCK(tdnode); 1108197953Sdelphij 1109197953Sdelphij TMPFS_NODE_LOCK(fdnode); 1110197953Sdelphij TMPFS_ASSERT_LOCKED(fdnode); 1111170808Sdelphij fdnode->tn_links--; 1112197953Sdelphij TMPFS_NODE_UNLOCK(fdnode); 1113170808Sdelphij } 1114170808Sdelphij 1115170808Sdelphij /* Do the move: just remove the entry from the source directory 1116170808Sdelphij * and insert it into the target one. */ 1117170808Sdelphij tmpfs_dir_detach(fdvp, de); 1118170808Sdelphij tmpfs_dir_attach(tdvp, de); 1119170808Sdelphij } 1120170808Sdelphij 1121170808Sdelphij /* If the name has changed, we need to make it effective by changing 1122170808Sdelphij * it in the directory entry. */ 1123170808Sdelphij if (newname != NULL) { 1124170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1125170808Sdelphij 1126171087Sdelphij free(de->td_name, M_TMPFSNAME); 1127170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1128170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1129170808Sdelphij de->td_name = newname; 1130170808Sdelphij 1131170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1132170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1133170808Sdelphij } 1134170808Sdelphij 1135170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1136170808Sdelphij * from the target directory. */ 1137170808Sdelphij if (tvp != NULL) { 1138170808Sdelphij /* Remove the old entry from the target directory. */ 1139188318Skib de = tmpfs_dir_lookup(tdnode, tnode, tcnp); 1140170808Sdelphij tmpfs_dir_detach(tdvp, de); 1141170808Sdelphij 1142170808Sdelphij /* Free the directory entry we just deleted. Note that the 1143170808Sdelphij * node referred by it will not be removed until the vnode is 1144170808Sdelphij * really reclaimed. */ 1145170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1146170808Sdelphij } 1147170808Sdelphij 1148170808Sdelphij error = 0; 1149170808Sdelphij 1150170808Sdelphijout_locked: 1151170808Sdelphij if (fdnode != tdnode) 1152175294Sattilio VOP_UNLOCK(fdvp, 0); 1153170808Sdelphij 1154170808Sdelphijout: 1155170808Sdelphij /* Release target nodes. */ 1156170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1157170808Sdelphij * other code takes care of this... */ 1158170808Sdelphij if (tdvp == tvp) 1159170808Sdelphij vrele(tdvp); 1160170808Sdelphij else 1161170808Sdelphij vput(tdvp); 1162170808Sdelphij if (tvp != NULL) 1163170808Sdelphij vput(tvp); 1164170808Sdelphij 1165170808Sdelphij /* Release source nodes. */ 1166170808Sdelphij vrele(fdvp); 1167170808Sdelphij vrele(fvp); 1168170808Sdelphij 1169170808Sdelphij return error; 1170170808Sdelphij} 1171170808Sdelphij 1172170808Sdelphij/* --------------------------------------------------------------------- */ 1173170808Sdelphij 1174171069Sdelphijstatic int 1175170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1176170808Sdelphij{ 1177170808Sdelphij struct vnode *dvp = v->a_dvp; 1178170808Sdelphij struct vnode **vpp = v->a_vpp; 1179170808Sdelphij struct componentname *cnp = v->a_cnp; 1180170808Sdelphij struct vattr *vap = v->a_vap; 1181170808Sdelphij 1182170808Sdelphij MPASS(vap->va_type == VDIR); 1183170808Sdelphij 1184170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1185170808Sdelphij} 1186170808Sdelphij 1187170808Sdelphij/* --------------------------------------------------------------------- */ 1188170808Sdelphij 1189171069Sdelphijstatic int 1190170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1191170808Sdelphij{ 1192170808Sdelphij struct vnode *dvp = v->a_dvp; 1193170808Sdelphij struct vnode *vp = v->a_vp; 1194170808Sdelphij 1195170808Sdelphij int error; 1196170808Sdelphij struct tmpfs_dirent *de; 1197170808Sdelphij struct tmpfs_mount *tmp; 1198170808Sdelphij struct tmpfs_node *dnode; 1199170808Sdelphij struct tmpfs_node *node; 1200170808Sdelphij 1201176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1202176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1203170808Sdelphij 1204170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1205170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1206170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1207170808Sdelphij 1208171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1209171070Sdelphij * removed. */ 1210171070Sdelphij if (node->tn_size > 0) { 1211171070Sdelphij error = ENOTEMPTY; 1212171070Sdelphij goto out; 1213171070Sdelphij } 1214170808Sdelphij 1215170808Sdelphij if ((dnode->tn_flags & APPEND) 1216170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1217170808Sdelphij error = EPERM; 1218170808Sdelphij goto out; 1219170808Sdelphij } 1220170808Sdelphij 1221171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1222171070Sdelphij * We checked for that above so this is safe now. */ 1223170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1224170808Sdelphij 1225170808Sdelphij /* Get the directory entry associated with node (vp). This was 1226170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1227188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 1228170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1229170808Sdelphij v->a_cnp->cn_nameptr, 1230170808Sdelphij v->a_cnp->cn_namelen)); 1231170808Sdelphij 1232170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1233170808Sdelphij if (dnode->tn_flags & APPEND 1234170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1235170808Sdelphij error = EPERM; 1236170808Sdelphij goto out; 1237170808Sdelphij } 1238170808Sdelphij 1239197953Sdelphij 1240170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1241170808Sdelphij tmpfs_dir_detach(dvp, de); 1242170808Sdelphij 1243197953Sdelphij /* No vnode should be allocated for this entry from this point */ 1244197953Sdelphij TMPFS_NODE_LOCK(node); 1245197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1246170808Sdelphij node->tn_links--; 1247197953Sdelphij node->tn_dir.tn_parent = NULL; 1248170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1249170808Sdelphij TMPFS_NODE_MODIFIED; 1250197953Sdelphij 1251197953Sdelphij TMPFS_NODE_UNLOCK(node); 1252197953Sdelphij 1253197953Sdelphij TMPFS_NODE_LOCK(dnode); 1254197953Sdelphij TMPFS_ASSERT_ELOCKED(dnode); 1255197953Sdelphij dnode->tn_links--; 1256197953Sdelphij dnode->tn_status |= TMPFS_NODE_ACCESSED | \ 1257170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1258197953Sdelphij TMPFS_NODE_UNLOCK(dnode); 1259170808Sdelphij 1260171070Sdelphij cache_purge(dvp); 1261170808Sdelphij cache_purge(vp); 1262170808Sdelphij 1263170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1264170808Sdelphij * referred by it will not be removed until the vnode is really 1265170808Sdelphij * reclaimed. */ 1266170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1267170808Sdelphij 1268170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1269170808Sdelphij * interested parties and clean it from the cache). */ 1270170808Sdelphij 1271170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1272170808Sdelphij tmpfs_update(dvp); 1273170808Sdelphij 1274170808Sdelphij error = 0; 1275170808Sdelphij 1276170808Sdelphijout: 1277170808Sdelphij return error; 1278170808Sdelphij} 1279170808Sdelphij 1280170808Sdelphij/* --------------------------------------------------------------------- */ 1281170808Sdelphij 1282171069Sdelphijstatic int 1283170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1284170808Sdelphij{ 1285170808Sdelphij struct vnode *dvp = v->a_dvp; 1286170808Sdelphij struct vnode **vpp = v->a_vpp; 1287170808Sdelphij struct componentname *cnp = v->a_cnp; 1288170808Sdelphij struct vattr *vap = v->a_vap; 1289170808Sdelphij char *target = v->a_target; 1290170808Sdelphij 1291170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1292170808Sdelphij MPASS(vap->va_type == VLNK); 1293170808Sdelphij#else 1294170808Sdelphij vap->va_type = VLNK; 1295170808Sdelphij#endif 1296170808Sdelphij 1297170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1298170808Sdelphij} 1299170808Sdelphij 1300170808Sdelphij/* --------------------------------------------------------------------- */ 1301170808Sdelphij 1302171069Sdelphijstatic int 1303170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1304170808Sdelphij{ 1305170808Sdelphij struct vnode *vp = v->a_vp; 1306170808Sdelphij struct uio *uio = v->a_uio; 1307170808Sdelphij int *eofflag = v->a_eofflag; 1308170808Sdelphij u_long **cookies = v->a_cookies; 1309170808Sdelphij int *ncookies = v->a_ncookies; 1310170808Sdelphij 1311170808Sdelphij int error; 1312170808Sdelphij off_t startoff; 1313171802Sdelphij off_t cnt = 0; 1314170808Sdelphij struct tmpfs_node *node; 1315170808Sdelphij 1316170808Sdelphij /* This operation only makes sense on directory nodes. */ 1317171802Sdelphij if (vp->v_type != VDIR) 1318171802Sdelphij return ENOTDIR; 1319170808Sdelphij 1320170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1321170808Sdelphij 1322170808Sdelphij startoff = uio->uio_offset; 1323170808Sdelphij 1324171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1325170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1326171862Sdelphij if (error != 0) 1327171862Sdelphij goto outok; 1328171862Sdelphij cnt++; 1329171862Sdelphij } 1330171862Sdelphij 1331171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1332170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1333171862Sdelphij if (error != 0) 1334171862Sdelphij goto outok; 1335171862Sdelphij cnt++; 1336170808Sdelphij } 1337170808Sdelphij 1338171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1339171862Sdelphij 1340171862Sdelphijoutok: 1341171862Sdelphij MPASS(error >= -1); 1342171862Sdelphij 1343170808Sdelphij if (error == -1) 1344170808Sdelphij error = 0; 1345170808Sdelphij 1346170808Sdelphij if (eofflag != NULL) 1347170808Sdelphij *eofflag = 1348170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1349170808Sdelphij 1350170808Sdelphij /* Update NFS-related variables. */ 1351170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1352170808Sdelphij off_t i; 1353170808Sdelphij off_t off = startoff; 1354170808Sdelphij struct tmpfs_dirent *de = NULL; 1355170808Sdelphij 1356170808Sdelphij *ncookies = cnt; 1357170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1358170808Sdelphij 1359170808Sdelphij for (i = 0; i < cnt; i++) { 1360170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1361170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1362170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1363170808Sdelphij } else { 1364170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1365170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1366170808Sdelphij } else if (de != NULL) { 1367170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1368170808Sdelphij } else { 1369170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1370170808Sdelphij off); 1371170808Sdelphij MPASS(de != NULL); 1372170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1373170808Sdelphij } 1374171802Sdelphij if (de == NULL) 1375170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1376171802Sdelphij else 1377171802Sdelphij off = tmpfs_dircookie(de); 1378170808Sdelphij } 1379170808Sdelphij 1380170808Sdelphij (*cookies)[i] = off; 1381170808Sdelphij } 1382170808Sdelphij MPASS(uio->uio_offset == off); 1383170808Sdelphij } 1384170808Sdelphij 1385170808Sdelphij return error; 1386170808Sdelphij} 1387170808Sdelphij 1388170808Sdelphij/* --------------------------------------------------------------------- */ 1389170808Sdelphij 1390171069Sdelphijstatic int 1391170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1392170808Sdelphij{ 1393170808Sdelphij struct vnode *vp = v->a_vp; 1394170808Sdelphij struct uio *uio = v->a_uio; 1395170808Sdelphij 1396170808Sdelphij int error; 1397170808Sdelphij struct tmpfs_node *node; 1398170808Sdelphij 1399170808Sdelphij MPASS(uio->uio_offset == 0); 1400170808Sdelphij MPASS(vp->v_type == VLNK); 1401170808Sdelphij 1402170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1403170808Sdelphij 1404170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1405170808Sdelphij uio); 1406170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1407170808Sdelphij 1408170808Sdelphij return error; 1409170808Sdelphij} 1410170808Sdelphij 1411170808Sdelphij/* --------------------------------------------------------------------- */ 1412170808Sdelphij 1413171069Sdelphijstatic int 1414170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1415170808Sdelphij{ 1416170808Sdelphij struct vnode *vp = v->a_vp; 1417170808Sdelphij struct thread *l = v->a_td; 1418170808Sdelphij 1419170808Sdelphij struct tmpfs_node *node; 1420170808Sdelphij 1421176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1422170808Sdelphij 1423170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1424170808Sdelphij 1425170808Sdelphij if (node->tn_links == 0) 1426170808Sdelphij vrecycle(vp, l); 1427170808Sdelphij 1428170808Sdelphij return 0; 1429170808Sdelphij} 1430170808Sdelphij 1431170808Sdelphij/* --------------------------------------------------------------------- */ 1432170808Sdelphij 1433170808Sdelphijint 1434170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1435170808Sdelphij{ 1436170808Sdelphij struct vnode *vp = v->a_vp; 1437170808Sdelphij 1438170808Sdelphij struct tmpfs_mount *tmp; 1439170808Sdelphij struct tmpfs_node *node; 1440170808Sdelphij 1441170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1442170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1443171070Sdelphij 1444170808Sdelphij vnode_destroy_vobject(vp); 1445170808Sdelphij cache_purge(vp); 1446197953Sdelphij 1447197953Sdelphij TMPFS_NODE_LOCK(node); 1448197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1449170808Sdelphij tmpfs_free_vp(vp); 1450170808Sdelphij 1451170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1452170808Sdelphij * we must free its associated data structures (now that the vnode 1453170808Sdelphij * is being reclaimed). */ 1454197953Sdelphij if (node->tn_links == 0 && 1455197953Sdelphij (node->tn_vpstate & TMPFS_VNODE_ALLOCATING) == 0) { 1456197953Sdelphij node->tn_vpstate = TMPFS_VNODE_DOOMED; 1457197953Sdelphij TMPFS_NODE_UNLOCK(node); 1458170808Sdelphij tmpfs_free_node(tmp, node); 1459197953Sdelphij } else 1460197953Sdelphij TMPFS_NODE_UNLOCK(node); 1461170808Sdelphij 1462170808Sdelphij MPASS(vp->v_data == NULL); 1463170808Sdelphij return 0; 1464170808Sdelphij} 1465170808Sdelphij 1466170808Sdelphij/* --------------------------------------------------------------------- */ 1467170808Sdelphij 1468171069Sdelphijstatic int 1469170808Sdelphijtmpfs_print(struct vop_print_args *v) 1470170808Sdelphij{ 1471170808Sdelphij struct vnode *vp = v->a_vp; 1472170808Sdelphij 1473170808Sdelphij struct tmpfs_node *node; 1474170808Sdelphij 1475170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1476170808Sdelphij 1477170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1478170808Sdelphij node, node->tn_flags, node->tn_links); 1479170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1480170808Sdelphij ", status 0x%x\n", 1481170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1482170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1483170808Sdelphij 1484170808Sdelphij if (vp->v_type == VFIFO) 1485170808Sdelphij fifo_printinfo(vp); 1486170808Sdelphij 1487170808Sdelphij printf("\n"); 1488170808Sdelphij 1489170808Sdelphij return 0; 1490170808Sdelphij} 1491170808Sdelphij 1492170808Sdelphij/* --------------------------------------------------------------------- */ 1493170808Sdelphij 1494171069Sdelphijstatic int 1495170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1496170808Sdelphij{ 1497170808Sdelphij int name = v->a_name; 1498170808Sdelphij register_t *retval = v->a_retval; 1499170808Sdelphij 1500170808Sdelphij int error; 1501170808Sdelphij 1502170808Sdelphij error = 0; 1503170808Sdelphij 1504170808Sdelphij switch (name) { 1505170808Sdelphij case _PC_LINK_MAX: 1506170808Sdelphij *retval = LINK_MAX; 1507170808Sdelphij break; 1508170808Sdelphij 1509170808Sdelphij case _PC_NAME_MAX: 1510170808Sdelphij *retval = NAME_MAX; 1511170808Sdelphij break; 1512170808Sdelphij 1513170808Sdelphij case _PC_PATH_MAX: 1514170808Sdelphij *retval = PATH_MAX; 1515170808Sdelphij break; 1516170808Sdelphij 1517170808Sdelphij case _PC_PIPE_BUF: 1518170808Sdelphij *retval = PIPE_BUF; 1519170808Sdelphij break; 1520170808Sdelphij 1521170808Sdelphij case _PC_CHOWN_RESTRICTED: 1522170808Sdelphij *retval = 1; 1523170808Sdelphij break; 1524170808Sdelphij 1525170808Sdelphij case _PC_NO_TRUNC: 1526170808Sdelphij *retval = 1; 1527170808Sdelphij break; 1528170808Sdelphij 1529170808Sdelphij case _PC_SYNC_IO: 1530170808Sdelphij *retval = 1; 1531170808Sdelphij break; 1532170808Sdelphij 1533170808Sdelphij case _PC_FILESIZEBITS: 1534170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1535170808Sdelphij break; 1536170808Sdelphij 1537170808Sdelphij default: 1538170808Sdelphij error = EINVAL; 1539170808Sdelphij } 1540170808Sdelphij 1541170808Sdelphij return error; 1542170808Sdelphij} 1543170808Sdelphij 1544171069Sdelphijstatic int 1545170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1546170808Sdelphij{ 1547170808Sdelphij struct tmpfs_fid *tfhp; 1548170808Sdelphij struct tmpfs_node *node; 1549170808Sdelphij 1550170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1551170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1552170808Sdelphij 1553170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1554170808Sdelphij tfhp->tf_id = node->tn_id; 1555170808Sdelphij tfhp->tf_gen = node->tn_gen; 1556171070Sdelphij 1557170808Sdelphij return (0); 1558170808Sdelphij} 1559171069Sdelphij 1560171069Sdelphij/* --------------------------------------------------------------------- */ 1561171069Sdelphij 1562171069Sdelphij/* 1563171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1564171069Sdelphij */ 1565171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1566171069Sdelphij .vop_default = &default_vnodeops, 1567171069Sdelphij .vop_lookup = vfs_cache_lookup, 1568171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1569171069Sdelphij .vop_create = tmpfs_create, 1570171069Sdelphij .vop_mknod = tmpfs_mknod, 1571171069Sdelphij .vop_open = tmpfs_open, 1572171069Sdelphij .vop_close = tmpfs_close, 1573171069Sdelphij .vop_access = tmpfs_access, 1574171069Sdelphij .vop_getattr = tmpfs_getattr, 1575171069Sdelphij .vop_setattr = tmpfs_setattr, 1576171069Sdelphij .vop_read = tmpfs_read, 1577171069Sdelphij .vop_write = tmpfs_write, 1578171069Sdelphij .vop_fsync = tmpfs_fsync, 1579171069Sdelphij .vop_remove = tmpfs_remove, 1580171069Sdelphij .vop_link = tmpfs_link, 1581171069Sdelphij .vop_rename = tmpfs_rename, 1582171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1583171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1584171069Sdelphij .vop_symlink = tmpfs_symlink, 1585171069Sdelphij .vop_readdir = tmpfs_readdir, 1586171069Sdelphij .vop_readlink = tmpfs_readlink, 1587171069Sdelphij .vop_inactive = tmpfs_inactive, 1588171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1589171069Sdelphij .vop_print = tmpfs_print, 1590171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1591171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1592171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1593171069Sdelphij}; 1594171069Sdelphij 1595