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("$FreeBSD$"); 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> 45197850Sdelphij#include <sys/sched.h> 46197850Sdelphij#include <sys/sf_buf.h> 47170808Sdelphij#include <sys/stat.h> 48170808Sdelphij#include <sys/systm.h> 49233851Sgleb#include <sys/sysctl.h> 50170808Sdelphij#include <sys/unistd.h> 51170808Sdelphij#include <sys/vnode.h> 52170808Sdelphij 53170808Sdelphij#include <vm/vm.h> 54240238Skib#include <vm/vm_param.h> 55170808Sdelphij#include <vm/vm_object.h> 56170808Sdelphij#include <vm/vm_page.h> 57170808Sdelphij#include <vm/vm_pager.h> 58188929Salc 59170808Sdelphij#include <machine/_inttypes.h> 60170808Sdelphij 61170808Sdelphij#include <fs/fifofs/fifo.h> 62170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 63170808Sdelphij#include <fs/tmpfs/tmpfs.h> 64170808Sdelphij 65233851SglebSYSCTL_DECL(_vfs_tmpfs); 66233851Sgleb 67233851Sglebstatic volatile int tmpfs_rename_restarts; 68233851SglebSYSCTL_INT(_vfs_tmpfs, OID_AUTO, rename_restarts, CTLFLAG_RD, 69233851Sgleb __DEVOLATILE(int *, &tmpfs_rename_restarts), 0, 70233851Sgleb "Times rename had to restart due to lock contention"); 71233851Sgleb 72170808Sdelphij/* --------------------------------------------------------------------- */ 73170808Sdelphij 74171069Sdelphijstatic int 75170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 76170808Sdelphij{ 77170808Sdelphij struct vnode *dvp = v->a_dvp; 78170808Sdelphij struct vnode **vpp = v->a_vpp; 79170808Sdelphij struct componentname *cnp = v->a_cnp; 80170808Sdelphij 81170808Sdelphij int error; 82170808Sdelphij struct tmpfs_dirent *de; 83170808Sdelphij struct tmpfs_node *dnode; 84170808Sdelphij 85170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 86170808Sdelphij *vpp = NULLVP; 87170808Sdelphij 88170808Sdelphij /* Check accessibility of requested node as a first step. */ 89191990Sattilio error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_thread); 90170808Sdelphij if (error != 0) 91170808Sdelphij goto out; 92170808Sdelphij 93170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 94170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 95170808Sdelphij dnode->tn_dir.tn_parent == dnode, 96170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 97170808Sdelphij 98197953Sdelphij TMPFS_ASSERT_LOCKED(dnode); 99197953Sdelphij if (dnode->tn_dir.tn_parent == NULL) { 100197953Sdelphij error = ENOENT; 101197953Sdelphij goto out; 102197953Sdelphij } 103170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 104171799Sdelphij int ltype = 0; 105171799Sdelphij 106176559Sattilio ltype = VOP_ISLOCKED(dvp); 107171802Sdelphij vhold(dvp); 108175294Sattilio VOP_UNLOCK(dvp, 0); 109170808Sdelphij /* Allocate a new vnode on the matching entry. */ 110171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 111191990Sattilio cnp->cn_lkflags, vpp); 112170808Sdelphij 113175202Sattilio vn_lock(dvp, ltype | LK_RETRY); 114171802Sdelphij vdrop(dvp); 115170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 116170808Sdelphij VREF(dvp); 117170808Sdelphij *vpp = dvp; 118170808Sdelphij error = 0; 119170808Sdelphij } else { 120188318Skib de = tmpfs_dir_lookup(dnode, NULL, cnp); 121211598Sed if (de != NULL && de->td_node == NULL) 122211598Sed cnp->cn_flags |= ISWHITEOUT; 123211598Sed if (de == NULL || de->td_node == NULL) { 124170808Sdelphij /* The entry was not found in the directory. 125170808Sdelphij * This is OK if we are creating or renaming an 126170808Sdelphij * entry and are working on the last component of 127170808Sdelphij * the path name. */ 128170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 129170808Sdelphij (cnp->cn_nameiop == CREATE || \ 130211598Sed cnp->cn_nameiop == RENAME || 131211598Sed (cnp->cn_nameiop == DELETE && 132211598Sed cnp->cn_flags & DOWHITEOUT && 133211598Sed cnp->cn_flags & ISWHITEOUT))) { 134170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 135170808Sdelphij cnp->cn_thread); 136170808Sdelphij if (error != 0) 137170808Sdelphij goto out; 138170808Sdelphij 139170808Sdelphij /* Keep the component name in the buffer for 140170808Sdelphij * future uses. */ 141170808Sdelphij cnp->cn_flags |= SAVENAME; 142170808Sdelphij 143170808Sdelphij error = EJUSTRETURN; 144170808Sdelphij } else 145170808Sdelphij error = ENOENT; 146170808Sdelphij } else { 147170808Sdelphij struct tmpfs_node *tnode; 148170808Sdelphij 149170808Sdelphij /* The entry was found, so get its associated 150170808Sdelphij * tmpfs_node. */ 151170808Sdelphij tnode = de->td_node; 152170808Sdelphij 153170808Sdelphij /* If we are not at the last path component and 154170808Sdelphij * found a non-directory or non-link entry (which 155170808Sdelphij * may itself be pointing to a directory), raise 156170808Sdelphij * an error. */ 157170808Sdelphij if ((tnode->tn_type != VDIR && 158170808Sdelphij tnode->tn_type != VLNK) && 159170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 160170808Sdelphij error = ENOTDIR; 161170808Sdelphij goto out; 162170808Sdelphij } 163170808Sdelphij 164170808Sdelphij /* If we are deleting or renaming the entry, keep 165170808Sdelphij * track of its tmpfs_dirent so that it can be 166170808Sdelphij * easily deleted later. */ 167170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 168170808Sdelphij (cnp->cn_nameiop == DELETE || 169170808Sdelphij cnp->cn_nameiop == RENAME)) { 170170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 171170808Sdelphij cnp->cn_thread); 172170808Sdelphij if (error != 0) 173170808Sdelphij goto out; 174171070Sdelphij 175170808Sdelphij /* Allocate a new vnode on the matching entry. */ 176171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 177191990Sattilio cnp->cn_lkflags, vpp); 178170808Sdelphij if (error != 0) 179170808Sdelphij goto out; 180170808Sdelphij 181170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 182170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 183170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 184170808Sdelphij error = EPERM; 185170808Sdelphij vput(*vpp); 186170808Sdelphij *vpp = NULL; 187170808Sdelphij goto out; 188171070Sdelphij } 189170808Sdelphij cnp->cn_flags |= SAVENAME; 190171799Sdelphij } else { 191171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 192191990Sattilio cnp->cn_lkflags, vpp); 193170808Sdelphij } 194170808Sdelphij } 195170808Sdelphij } 196170808Sdelphij 197170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 198170808Sdelphij * request was for creation, as it does not improve timings on 199170808Sdelphij * emprical tests. */ 200170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 201170808Sdelphij cache_enter(dvp, *vpp, cnp); 202170808Sdelphij 203170808Sdelphijout: 204170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 205170808Sdelphij * locked. */ 206176559Sattilio MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 207170808Sdelphij 208170808Sdelphij return error; 209170808Sdelphij} 210170808Sdelphij 211170808Sdelphij/* --------------------------------------------------------------------- */ 212170808Sdelphij 213171069Sdelphijstatic int 214170808Sdelphijtmpfs_create(struct vop_create_args *v) 215170808Sdelphij{ 216170808Sdelphij struct vnode *dvp = v->a_dvp; 217170808Sdelphij struct vnode **vpp = v->a_vpp; 218170808Sdelphij struct componentname *cnp = v->a_cnp; 219170808Sdelphij struct vattr *vap = v->a_vap; 220170808Sdelphij 221170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 222170808Sdelphij 223170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 224170808Sdelphij} 225170808Sdelphij/* --------------------------------------------------------------------- */ 226170808Sdelphij 227171069Sdelphijstatic int 228170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 229170808Sdelphij{ 230170808Sdelphij struct vnode *dvp = v->a_dvp; 231170808Sdelphij struct vnode **vpp = v->a_vpp; 232170808Sdelphij struct componentname *cnp = v->a_cnp; 233170808Sdelphij struct vattr *vap = v->a_vap; 234170808Sdelphij 235170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 236170808Sdelphij vap->va_type != VFIFO) 237170808Sdelphij return EINVAL; 238170808Sdelphij 239170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 240170808Sdelphij} 241170808Sdelphij 242170808Sdelphij/* --------------------------------------------------------------------- */ 243170808Sdelphij 244171069Sdelphijstatic int 245170808Sdelphijtmpfs_open(struct vop_open_args *v) 246170808Sdelphij{ 247170808Sdelphij struct vnode *vp = v->a_vp; 248170808Sdelphij int mode = v->a_mode; 249170808Sdelphij 250170808Sdelphij int error; 251170808Sdelphij struct tmpfs_node *node; 252170808Sdelphij 253176559Sattilio MPASS(VOP_ISLOCKED(vp)); 254170808Sdelphij 255170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 256171070Sdelphij 257170808Sdelphij /* The file is still active but all its names have been removed 258170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 259170808Sdelphij * it is about to die. */ 260170808Sdelphij if (node->tn_links < 1) 261170808Sdelphij return (ENOENT); 262170808Sdelphij 263170808Sdelphij /* If the file is marked append-only, deny write requests. */ 264170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 265170808Sdelphij error = EPERM; 266170808Sdelphij else { 267170808Sdelphij error = 0; 268171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 269170808Sdelphij } 270170808Sdelphij 271176559Sattilio MPASS(VOP_ISLOCKED(vp)); 272170808Sdelphij return error; 273170808Sdelphij} 274170808Sdelphij 275170808Sdelphij/* --------------------------------------------------------------------- */ 276170808Sdelphij 277171069Sdelphijstatic int 278170808Sdelphijtmpfs_close(struct vop_close_args *v) 279170808Sdelphij{ 280170808Sdelphij struct vnode *vp = v->a_vp; 281170808Sdelphij 282176559Sattilio MPASS(VOP_ISLOCKED(vp)); 283170808Sdelphij 284218949Salc /* Update node times. */ 285218949Salc tmpfs_update(vp); 286170808Sdelphij 287218949Salc return (0); 288170808Sdelphij} 289170808Sdelphij 290170808Sdelphij/* --------------------------------------------------------------------- */ 291170808Sdelphij 292170808Sdelphijint 293170808Sdelphijtmpfs_access(struct vop_access_args *v) 294170808Sdelphij{ 295170808Sdelphij struct vnode *vp = v->a_vp; 296184413Strasz accmode_t accmode = v->a_accmode; 297170808Sdelphij struct ucred *cred = v->a_cred; 298170808Sdelphij 299170808Sdelphij int error; 300170808Sdelphij struct tmpfs_node *node; 301170808Sdelphij 302176559Sattilio MPASS(VOP_ISLOCKED(vp)); 303170808Sdelphij 304170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 305170808Sdelphij 306170808Sdelphij switch (vp->v_type) { 307170808Sdelphij case VDIR: 308170808Sdelphij /* FALLTHROUGH */ 309170808Sdelphij case VLNK: 310170808Sdelphij /* FALLTHROUGH */ 311170808Sdelphij case VREG: 312184413Strasz if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 313170808Sdelphij error = EROFS; 314170808Sdelphij goto out; 315170808Sdelphij } 316170808Sdelphij break; 317170808Sdelphij 318170808Sdelphij case VBLK: 319170808Sdelphij /* FALLTHROUGH */ 320170808Sdelphij case VCHR: 321170808Sdelphij /* FALLTHROUGH */ 322170808Sdelphij case VSOCK: 323170808Sdelphij /* FALLTHROUGH */ 324170808Sdelphij case VFIFO: 325170808Sdelphij break; 326170808Sdelphij 327170808Sdelphij default: 328170808Sdelphij error = EINVAL; 329170808Sdelphij goto out; 330170808Sdelphij } 331170808Sdelphij 332184413Strasz if (accmode & VWRITE && node->tn_flags & IMMUTABLE) { 333170808Sdelphij error = EPERM; 334170808Sdelphij goto out; 335170808Sdelphij } 336170808Sdelphij 337170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 338184413Strasz node->tn_gid, accmode, cred, NULL); 339170808Sdelphij 340170808Sdelphijout: 341176559Sattilio MPASS(VOP_ISLOCKED(vp)); 342170808Sdelphij 343170808Sdelphij return error; 344170808Sdelphij} 345170808Sdelphij 346170808Sdelphij/* --------------------------------------------------------------------- */ 347170808Sdelphij 348170808Sdelphijint 349170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 350170808Sdelphij{ 351170808Sdelphij struct vnode *vp = v->a_vp; 352170808Sdelphij struct vattr *vap = v->a_vap; 353170808Sdelphij 354170808Sdelphij struct tmpfs_node *node; 355170808Sdelphij 356170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 357170808Sdelphij 358170808Sdelphij tmpfs_update(vp); 359170808Sdelphij 360170808Sdelphij vap->va_type = vp->v_type; 361170808Sdelphij vap->va_mode = node->tn_mode; 362170808Sdelphij vap->va_nlink = node->tn_links; 363170808Sdelphij vap->va_uid = node->tn_uid; 364170808Sdelphij vap->va_gid = node->tn_gid; 365170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 366170808Sdelphij vap->va_fileid = node->tn_id; 367170808Sdelphij vap->va_size = node->tn_size; 368170808Sdelphij vap->va_blocksize = PAGE_SIZE; 369170808Sdelphij vap->va_atime = node->tn_atime; 370170808Sdelphij vap->va_mtime = node->tn_mtime; 371170808Sdelphij vap->va_ctime = node->tn_ctime; 372170808Sdelphij vap->va_birthtime = node->tn_birthtime; 373170808Sdelphij vap->va_gen = node->tn_gen; 374170808Sdelphij vap->va_flags = node->tn_flags; 375170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 376183214Skib node->tn_rdev : NODEV; 377170808Sdelphij vap->va_bytes = round_page(node->tn_size); 378183212Skib vap->va_filerev = 0; 379170808Sdelphij 380170808Sdelphij return 0; 381170808Sdelphij} 382170808Sdelphij 383170808Sdelphij/* --------------------------------------------------------------------- */ 384170808Sdelphij 385170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 386170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 387170808Sdelphijint 388170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 389170808Sdelphij{ 390170808Sdelphij struct vnode *vp = v->a_vp; 391170808Sdelphij struct vattr *vap = v->a_vap; 392170808Sdelphij struct ucred *cred = v->a_cred; 393182371Sattilio struct thread *td = curthread; 394170808Sdelphij 395170808Sdelphij int error; 396170808Sdelphij 397176559Sattilio MPASS(VOP_ISLOCKED(vp)); 398170808Sdelphij 399170808Sdelphij error = 0; 400170808Sdelphij 401170808Sdelphij /* Abort if any unsettable attribute is given. */ 402170808Sdelphij if (vap->va_type != VNON || 403170808Sdelphij vap->va_nlink != VNOVAL || 404170808Sdelphij vap->va_fsid != VNOVAL || 405170808Sdelphij vap->va_fileid != VNOVAL || 406170808Sdelphij vap->va_blocksize != VNOVAL || 407170808Sdelphij vap->va_gen != VNOVAL || 408170808Sdelphij vap->va_rdev != VNOVAL || 409170808Sdelphij vap->va_bytes != VNOVAL) 410170808Sdelphij error = EINVAL; 411170808Sdelphij 412170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 413182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 414170808Sdelphij 415170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 416182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 417170808Sdelphij 418170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 419182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 420170808Sdelphij 421170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 422182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 423170808Sdelphij 424170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 425170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 426170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 427170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 428170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 429170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 430171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 431182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 432170808Sdelphij 433170808Sdelphij /* Update the node times. We give preference to the error codes 434170808Sdelphij * generated by this function rather than the ones that may arise 435170808Sdelphij * from tmpfs_update. */ 436170808Sdelphij tmpfs_update(vp); 437170808Sdelphij 438176559Sattilio MPASS(VOP_ISLOCKED(vp)); 439170808Sdelphij 440170808Sdelphij return error; 441170808Sdelphij} 442170808Sdelphij 443170808Sdelphij/* --------------------------------------------------------------------- */ 444197850Sdelphijstatic int 445197850Sdelphijtmpfs_nocacheread(vm_object_t tobj, vm_pindex_t idx, 446197850Sdelphij vm_offset_t offset, size_t tlen, struct uio *uio) 447197850Sdelphij{ 448197850Sdelphij vm_page_t m; 449236209Salc int error, rv; 450171489Sdelphij 451197850Sdelphij VM_OBJECT_LOCK(tobj); 452197850Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 453231775Salc VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 454197850Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 455197850Sdelphij if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 456236209Salc rv = vm_pager_get_pages(tobj, &m, 1, 0); 457236209Salc if (rv != VM_PAGER_OK) { 458236209Salc vm_page_lock(m); 459236209Salc vm_page_free(m); 460236209Salc vm_page_unlock(m); 461236209Salc VM_OBJECT_UNLOCK(tobj); 462236209Salc return (EIO); 463197850Sdelphij } 464197850Sdelphij } else 465197850Sdelphij vm_page_zero_invalid(m, TRUE); 466197850Sdelphij } 467197850Sdelphij VM_OBJECT_UNLOCK(tobj); 468197850Sdelphij error = uiomove_fromphys(&m, offset, tlen, uio); 469197850Sdelphij VM_OBJECT_LOCK(tobj); 470207573Salc vm_page_lock(m); 471197850Sdelphij vm_page_unwire(m, TRUE); 472207573Salc vm_page_unlock(m); 473197850Sdelphij vm_page_wakeup(m); 474197850Sdelphij VM_OBJECT_UNLOCK(tobj); 475197850Sdelphij 476197850Sdelphij return (error); 477197850Sdelphij} 478197850Sdelphij 479197850Sdelphijstatic __inline int 480197850Sdelphijtmpfs_nocacheread_buf(vm_object_t tobj, vm_pindex_t idx, 481197850Sdelphij vm_offset_t offset, size_t tlen, void *buf) 482197850Sdelphij{ 483197850Sdelphij struct uio uio; 484197850Sdelphij struct iovec iov; 485197850Sdelphij 486197850Sdelphij uio.uio_iovcnt = 1; 487197850Sdelphij uio.uio_iov = &iov; 488197850Sdelphij iov.iov_base = buf; 489197850Sdelphij iov.iov_len = tlen; 490197850Sdelphij 491197850Sdelphij uio.uio_offset = 0; 492197850Sdelphij uio.uio_resid = tlen; 493197850Sdelphij uio.uio_rw = UIO_READ; 494197850Sdelphij uio.uio_segflg = UIO_SYSSPACE; 495197850Sdelphij uio.uio_td = curthread; 496197850Sdelphij 497197850Sdelphij return (tmpfs_nocacheread(tobj, idx, offset, tlen, &uio)); 498197850Sdelphij} 499197850Sdelphij 500170808Sdelphijstatic int 501171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 502170808Sdelphij{ 503197850Sdelphij struct sf_buf *sf; 504171489Sdelphij vm_pindex_t idx; 505171489Sdelphij vm_page_t m; 506188929Salc vm_offset_t offset; 507188929Salc off_t addr; 508171489Sdelphij size_t tlen; 509197850Sdelphij char *ma; 510171489Sdelphij int error; 511170808Sdelphij 512171489Sdelphij addr = uio->uio_offset; 513171489Sdelphij idx = OFF_TO_IDX(addr); 514171489Sdelphij offset = addr & PAGE_MASK; 515171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 516170808Sdelphij 517197740Sdelphij if ((vobj == NULL) || 518197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) 519171489Sdelphij goto nocache; 520170808Sdelphij 521171489Sdelphij VM_OBJECT_LOCK(vobj); 522171489Sdelphijlookupvpg: 523171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 524171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 525207530Salc if ((m->oflags & VPO_BUSY) != 0) { 526207530Salc /* 527207530Salc * Reference the page before unlocking and sleeping so 528207530Salc * that the page daemon is less likely to reclaim it. 529207530Salc */ 530225418Skib vm_page_reference(m); 531207530Salc vm_page_sleep(m, "tmfsmr"); 532171489Sdelphij goto lookupvpg; 533207530Salc } 534171489Sdelphij vm_page_busy(m); 535171489Sdelphij VM_OBJECT_UNLOCK(vobj); 536188929Salc error = uiomove_fromphys(&m, offset, tlen, uio); 537171489Sdelphij VM_OBJECT_LOCK(vobj); 538171489Sdelphij vm_page_wakeup(m); 539171489Sdelphij VM_OBJECT_UNLOCK(vobj); 540171489Sdelphij return (error); 541197850Sdelphij } else if (m != NULL && uio->uio_segflg == UIO_NOCOPY) { 542213735Savg KASSERT(offset == 0, 543213735Savg ("unexpected offset in tmpfs_mappedread for sendfile")); 544207530Salc if ((m->oflags & VPO_BUSY) != 0) { 545207530Salc /* 546207530Salc * Reference the page before unlocking and sleeping so 547207530Salc * that the page daemon is less likely to reclaim it. 548207530Salc */ 549225418Skib vm_page_reference(m); 550207530Salc vm_page_sleep(m, "tmfsmr"); 551197850Sdelphij goto lookupvpg; 552207530Salc } 553197850Sdelphij vm_page_busy(m); 554197850Sdelphij VM_OBJECT_UNLOCK(vobj); 555197850Sdelphij sched_pin(); 556197850Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 557197850Sdelphij ma = (char *)sf_buf_kva(sf); 558213735Savg error = tmpfs_nocacheread_buf(tobj, idx, 0, tlen, ma); 559197850Sdelphij if (error == 0) { 560213735Savg if (tlen != PAGE_SIZE) 561213735Savg bzero(ma + tlen, PAGE_SIZE - tlen); 562197850Sdelphij uio->uio_offset += tlen; 563197850Sdelphij uio->uio_resid -= tlen; 564197850Sdelphij } 565197850Sdelphij sf_buf_free(sf); 566197850Sdelphij sched_unpin(); 567197850Sdelphij VM_OBJECT_LOCK(vobj); 568212650Savg if (error == 0) 569213735Savg m->valid = VM_PAGE_BITS_ALL; 570197850Sdelphij vm_page_wakeup(m); 571197850Sdelphij VM_OBJECT_UNLOCK(vobj); 572197850Sdelphij return (error); 573171799Sdelphij } 574171489Sdelphij VM_OBJECT_UNLOCK(vobj); 575171489Sdelphijnocache: 576197850Sdelphij error = tmpfs_nocacheread(tobj, idx, offset, tlen, uio); 577171489Sdelphij 578171489Sdelphij return (error); 579170808Sdelphij} 580170808Sdelphij 581171069Sdelphijstatic int 582170808Sdelphijtmpfs_read(struct vop_read_args *v) 583170808Sdelphij{ 584170808Sdelphij struct vnode *vp = v->a_vp; 585170808Sdelphij struct uio *uio = v->a_uio; 586170808Sdelphij 587170808Sdelphij struct tmpfs_node *node; 588170808Sdelphij vm_object_t uobj; 589171489Sdelphij size_t len; 590171489Sdelphij int resid; 591170808Sdelphij 592174265Swkoszek int error = 0; 593170808Sdelphij 594170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 595170808Sdelphij 596170808Sdelphij if (vp->v_type != VREG) { 597170808Sdelphij error = EISDIR; 598170808Sdelphij goto out; 599170808Sdelphij } 600170808Sdelphij 601170808Sdelphij if (uio->uio_offset < 0) { 602170808Sdelphij error = EINVAL; 603170808Sdelphij goto out; 604170808Sdelphij } 605170808Sdelphij 606170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 607170808Sdelphij 608170808Sdelphij uobj = node->tn_reg.tn_aobj; 609171489Sdelphij while ((resid = uio->uio_resid) > 0) { 610171489Sdelphij error = 0; 611171489Sdelphij if (node->tn_size <= uio->uio_offset) 612171489Sdelphij break; 613171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 614171489Sdelphij if (len == 0) 615171489Sdelphij break; 616171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 617171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 618171489Sdelphij break; 619171489Sdelphij } 620170808Sdelphij 621170808Sdelphijout: 622170808Sdelphij 623170808Sdelphij return error; 624170808Sdelphij} 625170808Sdelphij 626170808Sdelphij/* --------------------------------------------------------------------- */ 627170808Sdelphij 628171069Sdelphijstatic int 629171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 630171489Sdelphij{ 631171489Sdelphij vm_pindex_t idx; 632171489Sdelphij vm_page_t vpg, tpg; 633188929Salc vm_offset_t offset; 634188929Salc off_t addr; 635171489Sdelphij size_t tlen; 636236209Salc int error, rv; 637171489Sdelphij 638174265Swkoszek error = 0; 639174265Swkoszek 640171489Sdelphij addr = uio->uio_offset; 641171489Sdelphij idx = OFF_TO_IDX(addr); 642171489Sdelphij offset = addr & PAGE_MASK; 643171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 644171489Sdelphij 645197740Sdelphij if ((vobj == NULL) || 646197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) { 647171489Sdelphij vpg = NULL; 648171489Sdelphij goto nocache; 649171489Sdelphij } 650171489Sdelphij 651171489Sdelphij VM_OBJECT_LOCK(vobj); 652171489Sdelphijlookupvpg: 653171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 654171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 655207530Salc if ((vpg->oflags & VPO_BUSY) != 0) { 656207530Salc /* 657207530Salc * Reference the page before unlocking and sleeping so 658207530Salc * that the page daemon is less likely to reclaim it. 659207530Salc */ 660225418Skib vm_page_reference(vpg); 661207530Salc vm_page_sleep(vpg, "tmfsmw"); 662171489Sdelphij goto lookupvpg; 663207530Salc } 664171489Sdelphij vm_page_busy(vpg); 665171489Sdelphij vm_page_undirty(vpg); 666171489Sdelphij VM_OBJECT_UNLOCK(vobj); 667188929Salc error = uiomove_fromphys(&vpg, offset, tlen, uio); 668171489Sdelphij } else { 669197740Sdelphij if (__predict_false(vobj->cache != NULL)) 670197740Sdelphij vm_page_cache_free(vobj, idx, idx + 1); 671171489Sdelphij VM_OBJECT_UNLOCK(vobj); 672171489Sdelphij vpg = NULL; 673171489Sdelphij } 674171489Sdelphijnocache: 675171489Sdelphij VM_OBJECT_LOCK(tobj); 676171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 677231775Salc VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 678171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 679194124Salc if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 680236209Salc rv = vm_pager_get_pages(tobj, &tpg, 1, 0); 681236209Salc if (rv != VM_PAGER_OK) { 682236209Salc vm_page_lock(tpg); 683236209Salc vm_page_free(tpg); 684236209Salc vm_page_unlock(tpg); 685236209Salc error = EIO; 686171489Sdelphij goto out; 687171489Sdelphij } 688171489Sdelphij } else 689171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 690171489Sdelphij } 691171489Sdelphij VM_OBJECT_UNLOCK(tobj); 692188929Salc if (vpg == NULL) 693188929Salc error = uiomove_fromphys(&tpg, offset, tlen, uio); 694188929Salc else { 695171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 696171489Sdelphij pmap_copy_page(vpg, tpg); 697171489Sdelphij } 698171489Sdelphij VM_OBJECT_LOCK(tobj); 699171489Sdelphij if (error == 0) { 700192917Salc KASSERT(tpg->valid == VM_PAGE_BITS_ALL, 701192917Salc ("parts of tpg invalid")); 702171489Sdelphij vm_page_dirty(tpg); 703171489Sdelphij } 704209226Salc vm_page_lock(tpg); 705188921Salc vm_page_unwire(tpg, TRUE); 706207573Salc vm_page_unlock(tpg); 707171489Sdelphij vm_page_wakeup(tpg); 708236209Salcout: 709236209Salc VM_OBJECT_UNLOCK(tobj); 710236209Salc if (vpg != NULL) { 711236209Salc VM_OBJECT_LOCK(vobj); 712171489Sdelphij vm_page_wakeup(vpg); 713171489Sdelphij VM_OBJECT_UNLOCK(vobj); 714236209Salc } 715171489Sdelphij 716171489Sdelphij return (error); 717171489Sdelphij} 718171489Sdelphij 719171489Sdelphijstatic int 720170808Sdelphijtmpfs_write(struct vop_write_args *v) 721170808Sdelphij{ 722170808Sdelphij struct vnode *vp = v->a_vp; 723170808Sdelphij struct uio *uio = v->a_uio; 724170808Sdelphij int ioflag = v->a_ioflag; 725170808Sdelphij 726170808Sdelphij boolean_t extended; 727171489Sdelphij int error = 0; 728170808Sdelphij off_t oldsize; 729170808Sdelphij struct tmpfs_node *node; 730170808Sdelphij vm_object_t uobj; 731171489Sdelphij size_t len; 732171489Sdelphij int resid; 733170808Sdelphij 734170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 735170808Sdelphij oldsize = node->tn_size; 736170808Sdelphij 737170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 738170808Sdelphij error = EINVAL; 739170808Sdelphij goto out; 740170808Sdelphij } 741170808Sdelphij 742170808Sdelphij if (uio->uio_resid == 0) { 743170808Sdelphij error = 0; 744170808Sdelphij goto out; 745170808Sdelphij } 746170808Sdelphij 747170808Sdelphij if (ioflag & IO_APPEND) 748170808Sdelphij uio->uio_offset = node->tn_size; 749171070Sdelphij 750171070Sdelphij if (uio->uio_offset + uio->uio_resid > 751170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 752170808Sdelphij return (EFBIG); 753170808Sdelphij 754207719Strasz if (vn_rlimit_fsize(vp, uio, uio->uio_td)) 755207662Strasz return (EFBIG); 756170808Sdelphij 757170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 758170808Sdelphij if (extended) { 759236208Salc error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid, 760236208Salc FALSE); 761170808Sdelphij if (error != 0) 762170808Sdelphij goto out; 763170808Sdelphij } 764170808Sdelphij 765170808Sdelphij uobj = node->tn_reg.tn_aobj; 766171489Sdelphij while ((resid = uio->uio_resid) > 0) { 767171489Sdelphij if (node->tn_size <= uio->uio_offset) 768171489Sdelphij break; 769171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 770171489Sdelphij if (len == 0) 771171489Sdelphij break; 772171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 773171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 774171489Sdelphij break; 775171489Sdelphij } 776170808Sdelphij 777170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 778170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 779170808Sdelphij 780170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 781170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 782170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 783170808Sdelphij } 784170808Sdelphij 785170808Sdelphij if (error != 0) 786236208Salc (void)tmpfs_reg_resize(vp, oldsize, TRUE); 787170808Sdelphij 788170808Sdelphijout: 789170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 790170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 791170808Sdelphij 792170808Sdelphij return error; 793170808Sdelphij} 794170808Sdelphij 795170808Sdelphij/* --------------------------------------------------------------------- */ 796170808Sdelphij 797171069Sdelphijstatic int 798170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 799170808Sdelphij{ 800170808Sdelphij struct vnode *vp = v->a_vp; 801170808Sdelphij 802176559Sattilio MPASS(VOP_ISLOCKED(vp)); 803170808Sdelphij 804170808Sdelphij tmpfs_update(vp); 805170808Sdelphij 806170808Sdelphij return 0; 807170808Sdelphij} 808170808Sdelphij 809170808Sdelphij/* --------------------------------------------------------------------- */ 810170808Sdelphij 811171069Sdelphijstatic int 812170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 813170808Sdelphij{ 814170808Sdelphij struct vnode *dvp = v->a_dvp; 815170808Sdelphij struct vnode *vp = v->a_vp; 816170808Sdelphij 817170808Sdelphij int error; 818170808Sdelphij struct tmpfs_dirent *de; 819170808Sdelphij struct tmpfs_mount *tmp; 820170808Sdelphij struct tmpfs_node *dnode; 821170808Sdelphij struct tmpfs_node *node; 822170808Sdelphij 823176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 824176559Sattilio MPASS(VOP_ISLOCKED(vp)); 825170808Sdelphij 826170808Sdelphij if (vp->v_type == VDIR) { 827170808Sdelphij error = EISDIR; 828170808Sdelphij goto out; 829170808Sdelphij } 830170808Sdelphij 831170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 832170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 833170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 834188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 835170808Sdelphij MPASS(de != NULL); 836170808Sdelphij 837170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 838170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 839170808Sdelphij (dnode->tn_flags & APPEND)) { 840170808Sdelphij error = EPERM; 841170808Sdelphij goto out; 842170808Sdelphij } 843170808Sdelphij 844170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 845170808Sdelphij * have to change the number of hard links of the directory. */ 846170808Sdelphij tmpfs_dir_detach(dvp, de); 847211598Sed if (v->a_cnp->cn_flags & DOWHITEOUT) 848211598Sed tmpfs_dir_whiteout_add(dvp, v->a_cnp); 849170808Sdelphij 850170808Sdelphij /* Free the directory entry we just deleted. Note that the node 851170808Sdelphij * referred by it will not be removed until the vnode is really 852170808Sdelphij * reclaimed. */ 853170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 854170808Sdelphij 855218949Salc node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED; 856170808Sdelphij error = 0; 857170808Sdelphij 858170808Sdelphijout: 859170808Sdelphij 860170808Sdelphij return error; 861170808Sdelphij} 862170808Sdelphij 863170808Sdelphij/* --------------------------------------------------------------------- */ 864170808Sdelphij 865171069Sdelphijstatic int 866170808Sdelphijtmpfs_link(struct vop_link_args *v) 867170808Sdelphij{ 868170808Sdelphij struct vnode *dvp = v->a_tdvp; 869170808Sdelphij struct vnode *vp = v->a_vp; 870170808Sdelphij struct componentname *cnp = v->a_cnp; 871170808Sdelphij 872170808Sdelphij int error; 873170808Sdelphij struct tmpfs_dirent *de; 874170808Sdelphij struct tmpfs_node *node; 875170808Sdelphij 876176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 877170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 878170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 879170808Sdelphij 880170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 881170808Sdelphij 882170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 883170808Sdelphij 884170808Sdelphij /* Hard links of directories are forbidden. */ 885170808Sdelphij if (vp->v_type == VDIR) { 886170808Sdelphij error = EPERM; 887170808Sdelphij goto out; 888170808Sdelphij } 889170808Sdelphij 890170808Sdelphij /* Cannot create cross-device links. */ 891170808Sdelphij if (dvp->v_mount != vp->v_mount) { 892170808Sdelphij error = EXDEV; 893170808Sdelphij goto out; 894170808Sdelphij } 895170808Sdelphij 896170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 897170808Sdelphij * by the system. */ 898170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 899170808Sdelphij if (node->tn_links == LINK_MAX) { 900170808Sdelphij error = EMLINK; 901170808Sdelphij goto out; 902170808Sdelphij } 903170808Sdelphij 904170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 905170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 906170808Sdelphij error = EPERM; 907170808Sdelphij goto out; 908170808Sdelphij } 909170808Sdelphij 910170808Sdelphij /* Allocate a new directory entry to represent the node. */ 911170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 912170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 913170808Sdelphij if (error != 0) 914170808Sdelphij goto out; 915170808Sdelphij 916170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 917211598Sed if (cnp->cn_flags & ISWHITEOUT) 918211598Sed tmpfs_dir_whiteout_remove(dvp, cnp); 919170808Sdelphij tmpfs_dir_attach(dvp, de); 920170808Sdelphij 921170808Sdelphij /* vp link count has changed, so update node times. */ 922170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 923170808Sdelphij tmpfs_update(vp); 924170808Sdelphij 925170808Sdelphij error = 0; 926171070Sdelphij 927170808Sdelphijout: 928170808Sdelphij return error; 929170808Sdelphij} 930170808Sdelphij 931170808Sdelphij/* --------------------------------------------------------------------- */ 932170808Sdelphij 933233851Sgleb/* 934233851Sgleb * We acquire all but fdvp locks using non-blocking acquisitions. If we 935233851Sgleb * fail to acquire any lock in the path we will drop all held locks, 936233851Sgleb * acquire the new lock in a blocking fashion, and then release it and 937233851Sgleb * restart the rename. This acquire/release step ensures that we do not 938233851Sgleb * spin on a lock waiting for release. On error release all vnode locks 939233851Sgleb * and decrement references the way tmpfs_rename() would do. 940233851Sgleb */ 941171069Sdelphijstatic int 942233851Sglebtmpfs_rename_relock(struct vnode *fdvp, struct vnode **fvpp, 943233851Sgleb struct vnode *tdvp, struct vnode **tvpp, 944233851Sgleb struct componentname *fcnp, struct componentname *tcnp) 945233851Sgleb{ 946233851Sgleb struct vnode *nvp; 947233851Sgleb struct mount *mp; 948233851Sgleb struct tmpfs_dirent *de; 949233851Sgleb int error, restarts = 0; 950233851Sgleb 951233851Sgleb VOP_UNLOCK(tdvp, 0); 952233851Sgleb if (*tvpp != NULL && *tvpp != tdvp) 953233851Sgleb VOP_UNLOCK(*tvpp, 0); 954233851Sgleb mp = fdvp->v_mount; 955233851Sgleb 956233851Sglebrelock: 957233851Sgleb restarts += 1; 958233851Sgleb error = vn_lock(fdvp, LK_EXCLUSIVE); 959233851Sgleb if (error) 960233851Sgleb goto releout; 961233851Sgleb if (vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { 962233851Sgleb VOP_UNLOCK(fdvp, 0); 963233851Sgleb error = vn_lock(tdvp, LK_EXCLUSIVE); 964233851Sgleb if (error) 965233851Sgleb goto releout; 966233851Sgleb VOP_UNLOCK(tdvp, 0); 967233851Sgleb goto relock; 968233851Sgleb } 969233851Sgleb /* 970233851Sgleb * Re-resolve fvp to be certain it still exists and fetch the 971233851Sgleb * correct vnode. 972233851Sgleb */ 973233851Sgleb de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(fdvp), NULL, fcnp); 974233851Sgleb if (de == NULL) { 975233851Sgleb VOP_UNLOCK(fdvp, 0); 976233851Sgleb VOP_UNLOCK(tdvp, 0); 977233851Sgleb if ((fcnp->cn_flags & ISDOTDOT) != 0 || 978233851Sgleb (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')) 979233851Sgleb error = EINVAL; 980233851Sgleb else 981233851Sgleb error = ENOENT; 982233851Sgleb goto releout; 983233851Sgleb } 984233851Sgleb error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE | LK_NOWAIT, &nvp); 985233851Sgleb if (error != 0) { 986233851Sgleb VOP_UNLOCK(fdvp, 0); 987233851Sgleb VOP_UNLOCK(tdvp, 0); 988233851Sgleb if (error != EBUSY) 989233851Sgleb goto releout; 990233851Sgleb error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE, &nvp); 991233851Sgleb if (error != 0) 992233851Sgleb goto releout; 993233851Sgleb VOP_UNLOCK(nvp, 0); 994233851Sgleb /* 995233851Sgleb * Concurrent rename race. 996233851Sgleb */ 997233851Sgleb if (nvp == tdvp) { 998233851Sgleb vrele(nvp); 999233851Sgleb error = EINVAL; 1000233851Sgleb goto releout; 1001233851Sgleb } 1002233851Sgleb vrele(*fvpp); 1003233851Sgleb *fvpp = nvp; 1004233851Sgleb goto relock; 1005233851Sgleb } 1006233851Sgleb vrele(*fvpp); 1007233851Sgleb *fvpp = nvp; 1008233851Sgleb VOP_UNLOCK(*fvpp, 0); 1009233851Sgleb /* 1010233851Sgleb * Re-resolve tvp and acquire the vnode lock if present. 1011233851Sgleb */ 1012233851Sgleb de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(tdvp), NULL, tcnp); 1013233851Sgleb /* 1014233851Sgleb * If tvp disappeared we just carry on. 1015233851Sgleb */ 1016233851Sgleb if (de == NULL && *tvpp != NULL) { 1017233851Sgleb vrele(*tvpp); 1018233851Sgleb *tvpp = NULL; 1019233851Sgleb } 1020233851Sgleb /* 1021233851Sgleb * Get the tvp ino if the lookup succeeded. We may have to restart 1022233851Sgleb * if the non-blocking acquire fails. 1023233851Sgleb */ 1024233851Sgleb if (de != NULL) { 1025233851Sgleb nvp = NULL; 1026233851Sgleb error = tmpfs_alloc_vp(mp, de->td_node, 1027233851Sgleb LK_EXCLUSIVE | LK_NOWAIT, &nvp); 1028233851Sgleb if (*tvpp != NULL) 1029233851Sgleb vrele(*tvpp); 1030233851Sgleb *tvpp = nvp; 1031233851Sgleb if (error != 0) { 1032233851Sgleb VOP_UNLOCK(fdvp, 0); 1033233851Sgleb VOP_UNLOCK(tdvp, 0); 1034233851Sgleb if (error != EBUSY) 1035233851Sgleb goto releout; 1036233851Sgleb error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE, 1037233851Sgleb &nvp); 1038233851Sgleb if (error != 0) 1039233851Sgleb goto releout; 1040233851Sgleb VOP_UNLOCK(nvp, 0); 1041233851Sgleb /* 1042233851Sgleb * fdvp contains fvp, thus tvp (=fdvp) is not empty. 1043233851Sgleb */ 1044233851Sgleb if (nvp == fdvp) { 1045233851Sgleb error = ENOTEMPTY; 1046233851Sgleb goto releout; 1047233851Sgleb } 1048233851Sgleb goto relock; 1049233851Sgleb } 1050233851Sgleb } 1051233851Sgleb tmpfs_rename_restarts += restarts; 1052233851Sgleb 1053233851Sgleb return (0); 1054233851Sgleb 1055233851Sglebreleout: 1056233851Sgleb vrele(fdvp); 1057233851Sgleb vrele(*fvpp); 1058233851Sgleb vrele(tdvp); 1059233851Sgleb if (*tvpp != NULL) 1060233851Sgleb vrele(*tvpp); 1061233851Sgleb tmpfs_rename_restarts += restarts; 1062233851Sgleb 1063233851Sgleb return (error); 1064233851Sgleb} 1065233851Sgleb 1066233851Sglebstatic int 1067170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 1068170808Sdelphij{ 1069170808Sdelphij struct vnode *fdvp = v->a_fdvp; 1070170808Sdelphij struct vnode *fvp = v->a_fvp; 1071170808Sdelphij struct componentname *fcnp = v->a_fcnp; 1072170808Sdelphij struct vnode *tdvp = v->a_tdvp; 1073170808Sdelphij struct vnode *tvp = v->a_tvp; 1074170808Sdelphij struct componentname *tcnp = v->a_tcnp; 1075233851Sgleb struct mount *mp = NULL; 1076170808Sdelphij 1077170808Sdelphij char *newname; 1078170808Sdelphij int error; 1079170808Sdelphij struct tmpfs_dirent *de; 1080197953Sdelphij struct tmpfs_mount *tmp; 1081170808Sdelphij struct tmpfs_node *fdnode; 1082170808Sdelphij struct tmpfs_node *fnode; 1083171799Sdelphij struct tmpfs_node *tnode; 1084170808Sdelphij struct tmpfs_node *tdnode; 1085170808Sdelphij 1086176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 1087176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 1088170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 1089170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 1090170808Sdelphij 1091170808Sdelphij /* Disallow cross-device renames. 1092170808Sdelphij * XXX Why isn't this done by the caller? */ 1093170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 1094170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 1095170808Sdelphij error = EXDEV; 1096170808Sdelphij goto out; 1097170808Sdelphij } 1098170808Sdelphij 1099170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 1100170808Sdelphij if (fvp == tvp) { 1101170808Sdelphij error = 0; 1102170808Sdelphij goto out; 1103170808Sdelphij } 1104170808Sdelphij 1105173725Sdelphij /* If we need to move the directory between entries, lock the 1106173725Sdelphij * source so that we can safely operate on it. */ 1107233851Sgleb if (fdvp != tdvp && fdvp != tvp) { 1108233851Sgleb if (vn_lock(fdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { 1109233851Sgleb mp = tdvp->v_mount; 1110233851Sgleb error = vfs_busy(mp, 0); 1111233851Sgleb if (error != 0) { 1112233851Sgleb mp = NULL; 1113233851Sgleb goto out; 1114233851Sgleb } 1115233851Sgleb error = tmpfs_rename_relock(fdvp, &fvp, tdvp, &tvp, 1116233851Sgleb fcnp, tcnp); 1117233851Sgleb if (error != 0) { 1118233851Sgleb vfs_unbusy(mp); 1119233851Sgleb return (error); 1120233851Sgleb } 1121233851Sgleb ASSERT_VOP_ELOCKED(fdvp, 1122233851Sgleb "tmpfs_rename: fdvp not locked"); 1123233851Sgleb ASSERT_VOP_ELOCKED(tdvp, 1124233851Sgleb "tmpfs_rename: tdvp not locked"); 1125233851Sgleb if (tvp != NULL) 1126233851Sgleb ASSERT_VOP_ELOCKED(tvp, 1127233851Sgleb "tmpfs_rename: tvp not locked"); 1128233851Sgleb if (fvp == tvp) { 1129233851Sgleb error = 0; 1130233851Sgleb goto out_locked; 1131233851Sgleb } 1132233851Sgleb } 1133233851Sgleb } 1134233851Sgleb 1135233851Sgleb tmp = VFS_TO_TMPFS(tdvp->v_mount); 1136233851Sgleb tdnode = VP_TO_TMPFS_DIR(tdvp); 1137233851Sgleb tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 1138173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 1139173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 1140188318Skib de = tmpfs_dir_lookup(fdnode, fnode, fcnp); 1141173725Sdelphij 1142212305Sivoras /* Entry can disappear before we lock fdvp, 1143212305Sivoras * also avoid manipulating '.' and '..' entries. */ 1144170808Sdelphij if (de == NULL) { 1145212305Sivoras if ((fcnp->cn_flags & ISDOTDOT) != 0 || 1146212305Sivoras (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')) 1147212305Sivoras error = EINVAL; 1148212305Sivoras else 1149212305Sivoras error = ENOENT; 1150173725Sdelphij goto out_locked; 1151170808Sdelphij } 1152170808Sdelphij MPASS(de->td_node == fnode); 1153170808Sdelphij 1154171070Sdelphij /* If re-naming a directory to another preexisting directory 1155170808Sdelphij * ensure that the target directory is empty so that its 1156171070Sdelphij * removal causes no side effects. 1157170808Sdelphij * Kern_rename gurantees the destination to be a directory 1158170808Sdelphij * if the source is one. */ 1159170808Sdelphij if (tvp != NULL) { 1160171799Sdelphij MPASS(tnode != NULL); 1161171070Sdelphij 1162170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 1163170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 1164170808Sdelphij error = EPERM; 1165173725Sdelphij goto out_locked; 1166170808Sdelphij } 1167170808Sdelphij 1168171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 1169171799Sdelphij if (tnode->tn_size > 0) { 1170171799Sdelphij error = ENOTEMPTY; 1171173725Sdelphij goto out_locked; 1172171799Sdelphij } 1173171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 1174171799Sdelphij error = ENOTDIR; 1175173725Sdelphij goto out_locked; 1176171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 1177171799Sdelphij error = EISDIR; 1178173725Sdelphij goto out_locked; 1179171799Sdelphij } else { 1180171799Sdelphij MPASS(fnode->tn_type != VDIR && 1181171799Sdelphij tnode->tn_type != VDIR); 1182170808Sdelphij } 1183170808Sdelphij } 1184170808Sdelphij 1185170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 1186170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 1187170808Sdelphij error = EPERM; 1188170808Sdelphij goto out_locked; 1189170808Sdelphij } 1190170808Sdelphij 1191170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 1192170808Sdelphij * has to be changed. */ 1193170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 1194183299Sobrien bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 1195171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 1196170808Sdelphij } else 1197170808Sdelphij newname = NULL; 1198170808Sdelphij 1199170808Sdelphij /* If the node is being moved to another directory, we have to do 1200170808Sdelphij * the move. */ 1201170808Sdelphij if (fdnode != tdnode) { 1202170808Sdelphij /* In case we are moving a directory, we have to adjust its 1203170808Sdelphij * parent to point to the new parent. */ 1204170808Sdelphij if (de->td_node->tn_type == VDIR) { 1205170808Sdelphij struct tmpfs_node *n; 1206170808Sdelphij 1207170808Sdelphij /* Ensure the target directory is not a child of the 1208170808Sdelphij * directory being moved. Otherwise, we'd end up 1209170808Sdelphij * with stale nodes. */ 1210170808Sdelphij n = tdnode; 1211197953Sdelphij /* TMPFS_LOCK garanties that no nodes are freed while 1212197953Sdelphij * traversing the list. Nodes can only be marked as 1213197953Sdelphij * removed: tn_parent == NULL. */ 1214197953Sdelphij TMPFS_LOCK(tmp); 1215197953Sdelphij TMPFS_NODE_LOCK(n); 1216170808Sdelphij while (n != n->tn_dir.tn_parent) { 1217197953Sdelphij struct tmpfs_node *parent; 1218197953Sdelphij 1219170808Sdelphij if (n == fnode) { 1220197953Sdelphij TMPFS_NODE_UNLOCK(n); 1221197953Sdelphij TMPFS_UNLOCK(tmp); 1222170808Sdelphij error = EINVAL; 1223170808Sdelphij if (newname != NULL) 1224171087Sdelphij free(newname, M_TMPFSNAME); 1225170808Sdelphij goto out_locked; 1226170808Sdelphij } 1227197953Sdelphij parent = n->tn_dir.tn_parent; 1228197953Sdelphij TMPFS_NODE_UNLOCK(n); 1229197953Sdelphij if (parent == NULL) { 1230197953Sdelphij n = NULL; 1231197953Sdelphij break; 1232197953Sdelphij } 1233197953Sdelphij TMPFS_NODE_LOCK(parent); 1234197953Sdelphij if (parent->tn_dir.tn_parent == NULL) { 1235197953Sdelphij TMPFS_NODE_UNLOCK(parent); 1236197953Sdelphij n = NULL; 1237197953Sdelphij break; 1238197953Sdelphij } 1239197953Sdelphij n = parent; 1240170808Sdelphij } 1241197953Sdelphij TMPFS_UNLOCK(tmp); 1242197953Sdelphij if (n == NULL) { 1243197953Sdelphij error = EINVAL; 1244197953Sdelphij if (newname != NULL) 1245197953Sdelphij free(newname, M_TMPFSNAME); 1246197953Sdelphij goto out_locked; 1247197953Sdelphij } 1248197953Sdelphij TMPFS_NODE_UNLOCK(n); 1249170808Sdelphij 1250170808Sdelphij /* Adjust the parent pointer. */ 1251170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1252197953Sdelphij TMPFS_NODE_LOCK(de->td_node); 1253170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1254197953Sdelphij TMPFS_NODE_UNLOCK(de->td_node); 1255170808Sdelphij 1256170808Sdelphij /* As a result of changing the target of the '..' 1257170808Sdelphij * entry, the link count of the source and target 1258170808Sdelphij * directories has to be adjusted. */ 1259197953Sdelphij TMPFS_NODE_LOCK(tdnode); 1260197953Sdelphij TMPFS_ASSERT_LOCKED(tdnode); 1261197953Sdelphij tdnode->tn_links++; 1262197953Sdelphij TMPFS_NODE_UNLOCK(tdnode); 1263197953Sdelphij 1264197953Sdelphij TMPFS_NODE_LOCK(fdnode); 1265197953Sdelphij TMPFS_ASSERT_LOCKED(fdnode); 1266170808Sdelphij fdnode->tn_links--; 1267197953Sdelphij TMPFS_NODE_UNLOCK(fdnode); 1268170808Sdelphij } 1269170808Sdelphij 1270170808Sdelphij /* Do the move: just remove the entry from the source directory 1271170808Sdelphij * and insert it into the target one. */ 1272170808Sdelphij tmpfs_dir_detach(fdvp, de); 1273211598Sed if (fcnp->cn_flags & DOWHITEOUT) 1274211598Sed tmpfs_dir_whiteout_add(fdvp, fcnp); 1275211598Sed if (tcnp->cn_flags & ISWHITEOUT) 1276211598Sed tmpfs_dir_whiteout_remove(tdvp, tcnp); 1277170808Sdelphij tmpfs_dir_attach(tdvp, de); 1278170808Sdelphij } 1279170808Sdelphij 1280170808Sdelphij /* If the name has changed, we need to make it effective by changing 1281170808Sdelphij * it in the directory entry. */ 1282170808Sdelphij if (newname != NULL) { 1283170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1284170808Sdelphij 1285171087Sdelphij free(de->td_name, M_TMPFSNAME); 1286170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1287170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1288170808Sdelphij de->td_name = newname; 1289170808Sdelphij 1290170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1291170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1292170808Sdelphij } 1293170808Sdelphij 1294170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1295170808Sdelphij * from the target directory. */ 1296170808Sdelphij if (tvp != NULL) { 1297170808Sdelphij /* Remove the old entry from the target directory. */ 1298188318Skib de = tmpfs_dir_lookup(tdnode, tnode, tcnp); 1299170808Sdelphij tmpfs_dir_detach(tdvp, de); 1300170808Sdelphij 1301170808Sdelphij /* Free the directory entry we just deleted. Note that the 1302170808Sdelphij * node referred by it will not be removed until the vnode is 1303170808Sdelphij * really reclaimed. */ 1304170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1305170808Sdelphij } 1306229130Spho cache_purge(fvp); 1307233385Sjhb if (tvp != NULL) 1308233385Sjhb cache_purge(tvp); 1309248678Skib cache_purge_negative(tdvp); 1310170808Sdelphij 1311170808Sdelphij error = 0; 1312170808Sdelphij 1313170808Sdelphijout_locked: 1314229855Sivoras if (fdvp != tdvp && fdvp != tvp) 1315175294Sattilio VOP_UNLOCK(fdvp, 0); 1316170808Sdelphij 1317170808Sdelphijout: 1318170808Sdelphij /* Release target nodes. */ 1319170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1320170808Sdelphij * other code takes care of this... */ 1321170808Sdelphij if (tdvp == tvp) 1322170808Sdelphij vrele(tdvp); 1323170808Sdelphij else 1324170808Sdelphij vput(tdvp); 1325170808Sdelphij if (tvp != NULL) 1326170808Sdelphij vput(tvp); 1327170808Sdelphij 1328170808Sdelphij /* Release source nodes. */ 1329170808Sdelphij vrele(fdvp); 1330170808Sdelphij vrele(fvp); 1331170808Sdelphij 1332233851Sgleb if (mp != NULL) 1333233851Sgleb vfs_unbusy(mp); 1334233851Sgleb 1335170808Sdelphij return error; 1336170808Sdelphij} 1337170808Sdelphij 1338170808Sdelphij/* --------------------------------------------------------------------- */ 1339170808Sdelphij 1340171069Sdelphijstatic int 1341170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1342170808Sdelphij{ 1343170808Sdelphij struct vnode *dvp = v->a_dvp; 1344170808Sdelphij struct vnode **vpp = v->a_vpp; 1345170808Sdelphij struct componentname *cnp = v->a_cnp; 1346170808Sdelphij struct vattr *vap = v->a_vap; 1347170808Sdelphij 1348170808Sdelphij MPASS(vap->va_type == VDIR); 1349170808Sdelphij 1350170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1351170808Sdelphij} 1352170808Sdelphij 1353170808Sdelphij/* --------------------------------------------------------------------- */ 1354170808Sdelphij 1355171069Sdelphijstatic int 1356170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1357170808Sdelphij{ 1358170808Sdelphij struct vnode *dvp = v->a_dvp; 1359170808Sdelphij struct vnode *vp = v->a_vp; 1360170808Sdelphij 1361170808Sdelphij int error; 1362170808Sdelphij struct tmpfs_dirent *de; 1363170808Sdelphij struct tmpfs_mount *tmp; 1364170808Sdelphij struct tmpfs_node *dnode; 1365170808Sdelphij struct tmpfs_node *node; 1366170808Sdelphij 1367176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1368176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1369170808Sdelphij 1370170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1371170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1372170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1373170808Sdelphij 1374171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1375171070Sdelphij * removed. */ 1376171070Sdelphij if (node->tn_size > 0) { 1377171070Sdelphij error = ENOTEMPTY; 1378171070Sdelphij goto out; 1379171070Sdelphij } 1380170808Sdelphij 1381170808Sdelphij if ((dnode->tn_flags & APPEND) 1382170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1383170808Sdelphij error = EPERM; 1384170808Sdelphij goto out; 1385170808Sdelphij } 1386170808Sdelphij 1387171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1388171070Sdelphij * We checked for that above so this is safe now. */ 1389170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1390170808Sdelphij 1391170808Sdelphij /* Get the directory entry associated with node (vp). This was 1392170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1393188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 1394170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1395170808Sdelphij v->a_cnp->cn_nameptr, 1396170808Sdelphij v->a_cnp->cn_namelen)); 1397170808Sdelphij 1398170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1399170808Sdelphij if (dnode->tn_flags & APPEND 1400170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1401170808Sdelphij error = EPERM; 1402170808Sdelphij goto out; 1403170808Sdelphij } 1404170808Sdelphij 1405197953Sdelphij 1406170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1407170808Sdelphij tmpfs_dir_detach(dvp, de); 1408211598Sed if (v->a_cnp->cn_flags & DOWHITEOUT) 1409211598Sed tmpfs_dir_whiteout_add(dvp, v->a_cnp); 1410170808Sdelphij 1411197953Sdelphij /* No vnode should be allocated for this entry from this point */ 1412197953Sdelphij TMPFS_NODE_LOCK(node); 1413197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1414170808Sdelphij node->tn_links--; 1415197953Sdelphij node->tn_dir.tn_parent = NULL; 1416170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1417170808Sdelphij TMPFS_NODE_MODIFIED; 1418197953Sdelphij 1419197953Sdelphij TMPFS_NODE_UNLOCK(node); 1420197953Sdelphij 1421197953Sdelphij TMPFS_NODE_LOCK(dnode); 1422197953Sdelphij TMPFS_ASSERT_ELOCKED(dnode); 1423197953Sdelphij dnode->tn_links--; 1424197953Sdelphij dnode->tn_status |= TMPFS_NODE_ACCESSED | \ 1425170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1426197953Sdelphij TMPFS_NODE_UNLOCK(dnode); 1427170808Sdelphij 1428171070Sdelphij cache_purge(dvp); 1429170808Sdelphij cache_purge(vp); 1430170808Sdelphij 1431170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1432170808Sdelphij * referred by it will not be removed until the vnode is really 1433170808Sdelphij * reclaimed. */ 1434170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1435170808Sdelphij 1436170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1437170808Sdelphij * interested parties and clean it from the cache). */ 1438170808Sdelphij 1439170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1440170808Sdelphij tmpfs_update(dvp); 1441170808Sdelphij 1442170808Sdelphij error = 0; 1443170808Sdelphij 1444170808Sdelphijout: 1445170808Sdelphij return error; 1446170808Sdelphij} 1447170808Sdelphij 1448170808Sdelphij/* --------------------------------------------------------------------- */ 1449170808Sdelphij 1450171069Sdelphijstatic int 1451170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1452170808Sdelphij{ 1453170808Sdelphij struct vnode *dvp = v->a_dvp; 1454170808Sdelphij struct vnode **vpp = v->a_vpp; 1455170808Sdelphij struct componentname *cnp = v->a_cnp; 1456170808Sdelphij struct vattr *vap = v->a_vap; 1457170808Sdelphij char *target = v->a_target; 1458170808Sdelphij 1459170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1460170808Sdelphij MPASS(vap->va_type == VLNK); 1461170808Sdelphij#else 1462170808Sdelphij vap->va_type = VLNK; 1463170808Sdelphij#endif 1464170808Sdelphij 1465170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1466170808Sdelphij} 1467170808Sdelphij 1468170808Sdelphij/* --------------------------------------------------------------------- */ 1469170808Sdelphij 1470171069Sdelphijstatic int 1471170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1472170808Sdelphij{ 1473170808Sdelphij struct vnode *vp = v->a_vp; 1474170808Sdelphij struct uio *uio = v->a_uio; 1475170808Sdelphij int *eofflag = v->a_eofflag; 1476170808Sdelphij u_long **cookies = v->a_cookies; 1477170808Sdelphij int *ncookies = v->a_ncookies; 1478170808Sdelphij 1479170808Sdelphij int error; 1480170808Sdelphij off_t startoff; 1481171802Sdelphij off_t cnt = 0; 1482170808Sdelphij struct tmpfs_node *node; 1483170808Sdelphij 1484170808Sdelphij /* This operation only makes sense on directory nodes. */ 1485171802Sdelphij if (vp->v_type != VDIR) 1486171802Sdelphij return ENOTDIR; 1487170808Sdelphij 1488170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1489170808Sdelphij 1490170808Sdelphij startoff = uio->uio_offset; 1491170808Sdelphij 1492171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1493170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1494171862Sdelphij if (error != 0) 1495171862Sdelphij goto outok; 1496171862Sdelphij cnt++; 1497171862Sdelphij } 1498171862Sdelphij 1499171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1500170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1501171862Sdelphij if (error != 0) 1502171862Sdelphij goto outok; 1503171862Sdelphij cnt++; 1504170808Sdelphij } 1505170808Sdelphij 1506171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1507171862Sdelphij 1508171862Sdelphijoutok: 1509171862Sdelphij MPASS(error >= -1); 1510171862Sdelphij 1511170808Sdelphij if (error == -1) 1512217633Skib error = (cnt != 0) ? 0 : EINVAL; 1513170808Sdelphij 1514170808Sdelphij if (eofflag != NULL) 1515170808Sdelphij *eofflag = 1516170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1517170808Sdelphij 1518170808Sdelphij /* Update NFS-related variables. */ 1519170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1520170808Sdelphij off_t i; 1521170808Sdelphij off_t off = startoff; 1522170808Sdelphij struct tmpfs_dirent *de = NULL; 1523170808Sdelphij 1524170808Sdelphij *ncookies = cnt; 1525170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1526170808Sdelphij 1527170808Sdelphij for (i = 0; i < cnt; i++) { 1528170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1529170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1530170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1531170808Sdelphij } else { 1532170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1533170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1534170808Sdelphij } else if (de != NULL) { 1535170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1536170808Sdelphij } else { 1537170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1538170808Sdelphij off); 1539170808Sdelphij MPASS(de != NULL); 1540170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1541170808Sdelphij } 1542171802Sdelphij if (de == NULL) 1543170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1544171802Sdelphij else 1545171802Sdelphij off = tmpfs_dircookie(de); 1546170808Sdelphij } 1547170808Sdelphij 1548170808Sdelphij (*cookies)[i] = off; 1549170808Sdelphij } 1550170808Sdelphij MPASS(uio->uio_offset == off); 1551170808Sdelphij } 1552170808Sdelphij 1553170808Sdelphij return error; 1554170808Sdelphij} 1555170808Sdelphij 1556170808Sdelphij/* --------------------------------------------------------------------- */ 1557170808Sdelphij 1558171069Sdelphijstatic int 1559170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1560170808Sdelphij{ 1561170808Sdelphij struct vnode *vp = v->a_vp; 1562170808Sdelphij struct uio *uio = v->a_uio; 1563170808Sdelphij 1564170808Sdelphij int error; 1565170808Sdelphij struct tmpfs_node *node; 1566170808Sdelphij 1567170808Sdelphij MPASS(uio->uio_offset == 0); 1568170808Sdelphij MPASS(vp->v_type == VLNK); 1569170808Sdelphij 1570170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1571170808Sdelphij 1572170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1573170808Sdelphij uio); 1574170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1575170808Sdelphij 1576170808Sdelphij return error; 1577170808Sdelphij} 1578170808Sdelphij 1579170808Sdelphij/* --------------------------------------------------------------------- */ 1580170808Sdelphij 1581171069Sdelphijstatic int 1582170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1583170808Sdelphij{ 1584170808Sdelphij struct vnode *vp = v->a_vp; 1585170808Sdelphij struct thread *l = v->a_td; 1586170808Sdelphij 1587170808Sdelphij struct tmpfs_node *node; 1588170808Sdelphij 1589176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1590170808Sdelphij 1591170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1592170808Sdelphij 1593170808Sdelphij if (node->tn_links == 0) 1594170808Sdelphij vrecycle(vp, l); 1595170808Sdelphij 1596170808Sdelphij return 0; 1597170808Sdelphij} 1598170808Sdelphij 1599170808Sdelphij/* --------------------------------------------------------------------- */ 1600170808Sdelphij 1601170808Sdelphijint 1602170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1603170808Sdelphij{ 1604170808Sdelphij struct vnode *vp = v->a_vp; 1605170808Sdelphij 1606170808Sdelphij struct tmpfs_mount *tmp; 1607170808Sdelphij struct tmpfs_node *node; 1608170808Sdelphij 1609170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1610170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1611171070Sdelphij 1612170808Sdelphij vnode_destroy_vobject(vp); 1613170808Sdelphij cache_purge(vp); 1614197953Sdelphij 1615197953Sdelphij TMPFS_NODE_LOCK(node); 1616197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1617170808Sdelphij tmpfs_free_vp(vp); 1618170808Sdelphij 1619170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1620170808Sdelphij * we must free its associated data structures (now that the vnode 1621170808Sdelphij * is being reclaimed). */ 1622197953Sdelphij if (node->tn_links == 0 && 1623197953Sdelphij (node->tn_vpstate & TMPFS_VNODE_ALLOCATING) == 0) { 1624197953Sdelphij node->tn_vpstate = TMPFS_VNODE_DOOMED; 1625197953Sdelphij TMPFS_NODE_UNLOCK(node); 1626170808Sdelphij tmpfs_free_node(tmp, node); 1627197953Sdelphij } else 1628197953Sdelphij TMPFS_NODE_UNLOCK(node); 1629170808Sdelphij 1630170808Sdelphij MPASS(vp->v_data == NULL); 1631170808Sdelphij return 0; 1632170808Sdelphij} 1633170808Sdelphij 1634170808Sdelphij/* --------------------------------------------------------------------- */ 1635170808Sdelphij 1636171069Sdelphijstatic int 1637170808Sdelphijtmpfs_print(struct vop_print_args *v) 1638170808Sdelphij{ 1639170808Sdelphij struct vnode *vp = v->a_vp; 1640170808Sdelphij 1641170808Sdelphij struct tmpfs_node *node; 1642170808Sdelphij 1643170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1644170808Sdelphij 1645170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1646170808Sdelphij node, node->tn_flags, node->tn_links); 1647170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1648170808Sdelphij ", status 0x%x\n", 1649170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1650170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1651170808Sdelphij 1652170808Sdelphij if (vp->v_type == VFIFO) 1653170808Sdelphij fifo_printinfo(vp); 1654170808Sdelphij 1655170808Sdelphij printf("\n"); 1656170808Sdelphij 1657170808Sdelphij return 0; 1658170808Sdelphij} 1659170808Sdelphij 1660170808Sdelphij/* --------------------------------------------------------------------- */ 1661170808Sdelphij 1662171069Sdelphijstatic int 1663170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1664170808Sdelphij{ 1665170808Sdelphij int name = v->a_name; 1666170808Sdelphij register_t *retval = v->a_retval; 1667170808Sdelphij 1668170808Sdelphij int error; 1669170808Sdelphij 1670170808Sdelphij error = 0; 1671170808Sdelphij 1672170808Sdelphij switch (name) { 1673170808Sdelphij case _PC_LINK_MAX: 1674170808Sdelphij *retval = LINK_MAX; 1675170808Sdelphij break; 1676170808Sdelphij 1677170808Sdelphij case _PC_NAME_MAX: 1678170808Sdelphij *retval = NAME_MAX; 1679170808Sdelphij break; 1680170808Sdelphij 1681170808Sdelphij case _PC_PATH_MAX: 1682170808Sdelphij *retval = PATH_MAX; 1683170808Sdelphij break; 1684170808Sdelphij 1685170808Sdelphij case _PC_PIPE_BUF: 1686170808Sdelphij *retval = PIPE_BUF; 1687170808Sdelphij break; 1688170808Sdelphij 1689170808Sdelphij case _PC_CHOWN_RESTRICTED: 1690170808Sdelphij *retval = 1; 1691170808Sdelphij break; 1692170808Sdelphij 1693170808Sdelphij case _PC_NO_TRUNC: 1694170808Sdelphij *retval = 1; 1695170808Sdelphij break; 1696170808Sdelphij 1697170808Sdelphij case _PC_SYNC_IO: 1698170808Sdelphij *retval = 1; 1699170808Sdelphij break; 1700170808Sdelphij 1701170808Sdelphij case _PC_FILESIZEBITS: 1702170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1703170808Sdelphij break; 1704170808Sdelphij 1705170808Sdelphij default: 1706170808Sdelphij error = EINVAL; 1707170808Sdelphij } 1708170808Sdelphij 1709170808Sdelphij return error; 1710170808Sdelphij} 1711170808Sdelphij 1712171069Sdelphijstatic int 1713170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1714170808Sdelphij{ 1715170808Sdelphij struct tmpfs_fid *tfhp; 1716170808Sdelphij struct tmpfs_node *node; 1717170808Sdelphij 1718170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1719170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1720170808Sdelphij 1721170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1722170808Sdelphij tfhp->tf_id = node->tn_id; 1723170808Sdelphij tfhp->tf_gen = node->tn_gen; 1724171070Sdelphij 1725170808Sdelphij return (0); 1726170808Sdelphij} 1727171069Sdelphij 1728211598Sedstatic int 1729211598Sedtmpfs_whiteout(struct vop_whiteout_args *ap) 1730211598Sed{ 1731211598Sed struct vnode *dvp = ap->a_dvp; 1732211598Sed struct componentname *cnp = ap->a_cnp; 1733211598Sed struct tmpfs_dirent *de; 1734211598Sed 1735211598Sed switch (ap->a_flags) { 1736211598Sed case LOOKUP: 1737211598Sed return (0); 1738211598Sed case CREATE: 1739211598Sed de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(dvp), NULL, cnp); 1740211598Sed if (de != NULL) 1741211598Sed return (de->td_node == NULL ? 0 : EEXIST); 1742211598Sed return (tmpfs_dir_whiteout_add(dvp, cnp)); 1743211598Sed case DELETE: 1744211598Sed tmpfs_dir_whiteout_remove(dvp, cnp); 1745211598Sed return (0); 1746211598Sed default: 1747211598Sed panic("tmpfs_whiteout: unknown op"); 1748211598Sed } 1749211598Sed} 1750211598Sed 1751171069Sdelphij/* --------------------------------------------------------------------- */ 1752171069Sdelphij 1753171069Sdelphij/* 1754171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1755171069Sdelphij */ 1756171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1757171069Sdelphij .vop_default = &default_vnodeops, 1758171069Sdelphij .vop_lookup = vfs_cache_lookup, 1759171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1760171069Sdelphij .vop_create = tmpfs_create, 1761171069Sdelphij .vop_mknod = tmpfs_mknod, 1762171069Sdelphij .vop_open = tmpfs_open, 1763171069Sdelphij .vop_close = tmpfs_close, 1764171069Sdelphij .vop_access = tmpfs_access, 1765171069Sdelphij .vop_getattr = tmpfs_getattr, 1766171069Sdelphij .vop_setattr = tmpfs_setattr, 1767171069Sdelphij .vop_read = tmpfs_read, 1768171069Sdelphij .vop_write = tmpfs_write, 1769171069Sdelphij .vop_fsync = tmpfs_fsync, 1770171069Sdelphij .vop_remove = tmpfs_remove, 1771171069Sdelphij .vop_link = tmpfs_link, 1772171069Sdelphij .vop_rename = tmpfs_rename, 1773171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1774171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1775171069Sdelphij .vop_symlink = tmpfs_symlink, 1776171069Sdelphij .vop_readdir = tmpfs_readdir, 1777171069Sdelphij .vop_readlink = tmpfs_readlink, 1778171069Sdelphij .vop_inactive = tmpfs_inactive, 1779171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1780171069Sdelphij .vop_print = tmpfs_print, 1781171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1782171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1783211598Sed .vop_whiteout = tmpfs_whiteout, 1784171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1785171069Sdelphij}; 1786171069Sdelphij 1787