tmpfs_vnops.c revision 170808
1170808Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.20 2006/01/26 20:07:34 jmmv Exp $ */ 2170808Sdelphij 3170808Sdelphij/* 4170808Sdelphij * Copyright (c) 2005 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 3. All advertising materials mentioning features or use of this software 20170808Sdelphij * must display the following acknowledgement: 21170808Sdelphij * This product includes software developed by the NetBSD 22170808Sdelphij * Foundation, Inc. and its contributors. 23170808Sdelphij * 4. Neither the name of The NetBSD Foundation nor the names of its 24170808Sdelphij * contributors may be used to endorse or promote products derived 25170808Sdelphij * from this software without specific prior written permission. 26170808Sdelphij * 27170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 38170808Sdelphij */ 39170808Sdelphij 40170808Sdelphij/* 41170808Sdelphij * tmpfs vnode interface. 42170808Sdelphij */ 43170808Sdelphij#include <sys/cdefs.h> 44170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 170808 2007-06-16 01:56:05Z delphij $"); 45170808Sdelphij 46170808Sdelphij#include <sys/param.h> 47170808Sdelphij#include <sys/fcntl.h> 48170808Sdelphij#include <sys/lockf.h> 49170808Sdelphij#include <sys/namei.h> 50170808Sdelphij#include <sys/priv.h> 51170808Sdelphij#include <sys/proc.h> 52170808Sdelphij#include <sys/resourcevar.h> 53170808Sdelphij#include <sys/stat.h> 54170808Sdelphij#include <sys/systm.h> 55170808Sdelphij#include <sys/unistd.h> 56170808Sdelphij#include <sys/vnode.h> 57170808Sdelphij 58170808Sdelphij#include <vm/vm.h> 59170808Sdelphij#include <vm/vm_object.h> 60170808Sdelphij#include <vm/vm_page.h> 61170808Sdelphij#include <vm/vm_pager.h> 62170808Sdelphij#include <sys/sched.h> 63170808Sdelphij#include <sys/sf_buf.h> 64170808Sdelphij#include <machine/_inttypes.h> 65170808Sdelphij 66170808Sdelphij#include <fs/fifofs/fifo.h> 67170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 68170808Sdelphij#include <fs/tmpfs/tmpfs.h> 69170808Sdelphij 70170808Sdelphij/* --------------------------------------------------------------------- */ 71170808Sdelphij 72170808Sdelphij/* 73170808Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 74170808Sdelphij */ 75170808Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 76170808Sdelphij .vop_default = &default_vnodeops, 77170808Sdelphij .vop_lookup = vfs_cache_lookup, 78170808Sdelphij .vop_cachedlookup = tmpfs_lookup, 79170808Sdelphij .vop_create = tmpfs_create, 80170808Sdelphij .vop_mknod = tmpfs_mknod, 81170808Sdelphij .vop_open = tmpfs_open, 82170808Sdelphij .vop_close = tmpfs_close, 83170808Sdelphij .vop_access = tmpfs_access, 84170808Sdelphij .vop_getattr = tmpfs_getattr, 85170808Sdelphij .vop_setattr = tmpfs_setattr, 86170808Sdelphij .vop_read = tmpfs_read, 87170808Sdelphij .vop_write = tmpfs_write, 88170808Sdelphij .vop_fsync = tmpfs_fsync, 89170808Sdelphij .vop_remove = tmpfs_remove, 90170808Sdelphij .vop_link = tmpfs_link, 91170808Sdelphij .vop_rename = tmpfs_rename, 92170808Sdelphij .vop_mkdir = tmpfs_mkdir, 93170808Sdelphij .vop_rmdir = tmpfs_rmdir, 94170808Sdelphij .vop_symlink = tmpfs_symlink, 95170808Sdelphij .vop_readdir = tmpfs_readdir, 96170808Sdelphij .vop_readlink = tmpfs_readlink, 97170808Sdelphij .vop_inactive = tmpfs_inactive, 98170808Sdelphij .vop_reclaim = tmpfs_reclaim, 99170808Sdelphij .vop_print = tmpfs_print, 100170808Sdelphij .vop_pathconf = tmpfs_pathconf, 101170808Sdelphij .vop_advlock = tmpfs_advlock, 102170808Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 103170808Sdelphij}; 104170808Sdelphij 105170808Sdelphij/* --------------------------------------------------------------------- */ 106170808Sdelphij 107170808Sdelphijint 108170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 109170808Sdelphij{ 110170808Sdelphij struct vnode *dvp = v->a_dvp; 111170808Sdelphij struct vnode **vpp = v->a_vpp; 112170808Sdelphij struct componentname *cnp = v->a_cnp; 113170808Sdelphij struct thread *td = cnp->cn_thread; 114170808Sdelphij 115170808Sdelphij int error; 116170808Sdelphij struct tmpfs_dirent *de; 117170808Sdelphij struct tmpfs_node *dnode; 118170808Sdelphij 119170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 120170808Sdelphij *vpp = NULLVP; 121170808Sdelphij 122170808Sdelphij /* Check accessibility of requested node as a first step. */ 123170808Sdelphij error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td); 124170808Sdelphij if (error != 0) 125170808Sdelphij goto out; 126170808Sdelphij 127170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 128170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 129170808Sdelphij dnode->tn_dir.tn_parent == dnode, 130170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 131170808Sdelphij 132170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 133170808Sdelphij VOP_UNLOCK(dvp, 0, td); 134170808Sdelphij 135170808Sdelphij /* Allocate a new vnode on the matching entry. */ 136170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, vpp, td); 137170808Sdelphij 138170808Sdelphij vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 139170808Sdelphij 140170808Sdelphij dnode->tn_dir.tn_parent->tn_lookup_dirent = NULL; 141170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 142170808Sdelphij VREF(dvp); 143170808Sdelphij *vpp = dvp; 144170808Sdelphij dnode->tn_lookup_dirent = NULL; 145170808Sdelphij error = 0; 146170808Sdelphij } else { 147170808Sdelphij de = tmpfs_dir_lookup(dnode, cnp); 148170808Sdelphij if (de == NULL) { 149170808Sdelphij /* The entry was not found in the directory. 150170808Sdelphij * This is OK if we are creating or renaming an 151170808Sdelphij * entry and are working on the last component of 152170808Sdelphij * the path name. */ 153170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 154170808Sdelphij (cnp->cn_nameiop == CREATE || \ 155170808Sdelphij cnp->cn_nameiop == RENAME)) { 156170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 157170808Sdelphij cnp->cn_thread); 158170808Sdelphij if (error != 0) 159170808Sdelphij goto out; 160170808Sdelphij 161170808Sdelphij /* Keep the component name in the buffer for 162170808Sdelphij * future uses. */ 163170808Sdelphij cnp->cn_flags |= SAVENAME; 164170808Sdelphij 165170808Sdelphij error = EJUSTRETURN; 166170808Sdelphij } else 167170808Sdelphij error = ENOENT; 168170808Sdelphij } else { 169170808Sdelphij struct tmpfs_node *tnode; 170170808Sdelphij 171170808Sdelphij /* The entry was found, so get its associated 172170808Sdelphij * tmpfs_node. */ 173170808Sdelphij tnode = de->td_node; 174170808Sdelphij 175170808Sdelphij /* If we are not at the last path component and 176170808Sdelphij * found a non-directory or non-link entry (which 177170808Sdelphij * may itself be pointing to a directory), raise 178170808Sdelphij * an error. */ 179170808Sdelphij if ((tnode->tn_type != VDIR && 180170808Sdelphij tnode->tn_type != VLNK) && 181170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 182170808Sdelphij error = ENOTDIR; 183170808Sdelphij goto out; 184170808Sdelphij } 185170808Sdelphij 186170808Sdelphij /* If we are deleting or renaming the entry, keep 187170808Sdelphij * track of its tmpfs_dirent so that it can be 188170808Sdelphij * easily deleted later. */ 189170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 190170808Sdelphij (cnp->cn_nameiop == DELETE || 191170808Sdelphij cnp->cn_nameiop == RENAME)) { 192170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 193170808Sdelphij cnp->cn_thread); 194170808Sdelphij if (error != 0) 195170808Sdelphij goto out; 196170808Sdelphij 197170808Sdelphij /* Allocate a new vnode on the matching entry. */ 198170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 199170808Sdelphij if (error != 0) 200170808Sdelphij goto out; 201170808Sdelphij 202170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 203170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 204170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 205170808Sdelphij error = EPERM; 206170808Sdelphij vput(*vpp); 207170808Sdelphij *vpp = NULL; 208170808Sdelphij goto out; 209170808Sdelphij } 210170808Sdelphij tnode->tn_lookup_dirent = de; 211170808Sdelphij cnp->cn_flags |= SAVENAME; 212170808Sdelphij } 213170808Sdelphij else 214170808Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, vpp, td); 215170808Sdelphij 216170808Sdelphij } 217170808Sdelphij } 218170808Sdelphij 219170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 220170808Sdelphij * request was for creation, as it does not improve timings on 221170808Sdelphij * emprical tests. */ 222170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 223170808Sdelphij cache_enter(dvp, *vpp, cnp); 224170808Sdelphij 225170808Sdelphijout: 226170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 227170808Sdelphij * locked. */ 228170808Sdelphij MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp, td))); 229170808Sdelphij 230170808Sdelphij return error; 231170808Sdelphij} 232170808Sdelphij 233170808Sdelphij/* --------------------------------------------------------------------- */ 234170808Sdelphij 235170808Sdelphijint 236170808Sdelphijtmpfs_create(struct vop_create_args *v) 237170808Sdelphij{ 238170808Sdelphij struct vnode *dvp = v->a_dvp; 239170808Sdelphij struct vnode **vpp = v->a_vpp; 240170808Sdelphij struct componentname *cnp = v->a_cnp; 241170808Sdelphij struct vattr *vap = v->a_vap; 242170808Sdelphij 243170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 244170808Sdelphij 245170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 246170808Sdelphij} 247170808Sdelphij/* --------------------------------------------------------------------- */ 248170808Sdelphij 249170808Sdelphijint 250170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 251170808Sdelphij{ 252170808Sdelphij struct vnode *dvp = v->a_dvp; 253170808Sdelphij struct vnode **vpp = v->a_vpp; 254170808Sdelphij struct componentname *cnp = v->a_cnp; 255170808Sdelphij struct vattr *vap = v->a_vap; 256170808Sdelphij 257170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 258170808Sdelphij vap->va_type != VFIFO) 259170808Sdelphij return EINVAL; 260170808Sdelphij 261170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 262170808Sdelphij} 263170808Sdelphij 264170808Sdelphij/* --------------------------------------------------------------------- */ 265170808Sdelphij 266170808Sdelphijint 267170808Sdelphijtmpfs_open(struct vop_open_args *v) 268170808Sdelphij{ 269170808Sdelphij struct vnode *vp = v->a_vp; 270170808Sdelphij int mode = v->a_mode; 271170808Sdelphij 272170808Sdelphij int error; 273170808Sdelphij struct tmpfs_node *node; 274170808Sdelphij 275170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 276170808Sdelphij 277170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 278170808Sdelphij 279170808Sdelphij /* The file is still active but all its names have been removed 280170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 281170808Sdelphij * it is about to die. */ 282170808Sdelphij if (node->tn_links < 1) 283170808Sdelphij return (ENOENT); 284170808Sdelphij 285170808Sdelphij /* If the file is marked append-only, deny write requests. */ 286170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 287170808Sdelphij error = EPERM; 288170808Sdelphij else { 289170808Sdelphij error = 0; 290170808Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 291170808Sdelphij } 292170808Sdelphij 293170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 294170808Sdelphij return error; 295170808Sdelphij} 296170808Sdelphij 297170808Sdelphij/* --------------------------------------------------------------------- */ 298170808Sdelphij 299170808Sdelphijint 300170808Sdelphijtmpfs_close(struct vop_close_args *v) 301170808Sdelphij{ 302170808Sdelphij struct vnode *vp = v->a_vp; 303170808Sdelphij 304170808Sdelphij struct tmpfs_node *node; 305170808Sdelphij 306170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 307170808Sdelphij 308170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 309170808Sdelphij 310170808Sdelphij if (node->tn_links > 0) { 311170808Sdelphij /* Update node times. No need to do it if the node has 312170808Sdelphij * been deleted, because it will vanish after we return. */ 313170808Sdelphij tmpfs_update(vp); 314170808Sdelphij } 315170808Sdelphij 316170808Sdelphij return 0; 317170808Sdelphij} 318170808Sdelphij 319170808Sdelphij/* --------------------------------------------------------------------- */ 320170808Sdelphij 321170808Sdelphijint 322170808Sdelphijtmpfs_access(struct vop_access_args *v) 323170808Sdelphij{ 324170808Sdelphij struct vnode *vp = v->a_vp; 325170808Sdelphij int mode = v->a_mode; 326170808Sdelphij struct ucred *cred = v->a_cred; 327170808Sdelphij 328170808Sdelphij int error; 329170808Sdelphij struct tmpfs_node *node; 330170808Sdelphij 331170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 332170808Sdelphij 333170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 334170808Sdelphij 335170808Sdelphij switch (vp->v_type) { 336170808Sdelphij case VDIR: 337170808Sdelphij /* FALLTHROUGH */ 338170808Sdelphij case VLNK: 339170808Sdelphij /* FALLTHROUGH */ 340170808Sdelphij case VREG: 341170808Sdelphij if (mode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 342170808Sdelphij error = EROFS; 343170808Sdelphij goto out; 344170808Sdelphij } 345170808Sdelphij break; 346170808Sdelphij 347170808Sdelphij case VBLK: 348170808Sdelphij /* FALLTHROUGH */ 349170808Sdelphij case VCHR: 350170808Sdelphij /* FALLTHROUGH */ 351170808Sdelphij case VSOCK: 352170808Sdelphij /* FALLTHROUGH */ 353170808Sdelphij case VFIFO: 354170808Sdelphij break; 355170808Sdelphij 356170808Sdelphij default: 357170808Sdelphij error = EINVAL; 358170808Sdelphij goto out; 359170808Sdelphij } 360170808Sdelphij 361170808Sdelphij if (mode & VWRITE && node->tn_flags & IMMUTABLE) { 362170808Sdelphij error = EPERM; 363170808Sdelphij goto out; 364170808Sdelphij } 365170808Sdelphij 366170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 367170808Sdelphij node->tn_gid, mode, cred, NULL); 368170808Sdelphij 369170808Sdelphijout: 370170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 371170808Sdelphij 372170808Sdelphij return error; 373170808Sdelphij} 374170808Sdelphij 375170808Sdelphij/* --------------------------------------------------------------------- */ 376170808Sdelphij 377170808Sdelphijint 378170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 379170808Sdelphij{ 380170808Sdelphij struct vnode *vp = v->a_vp; 381170808Sdelphij struct vattr *vap = v->a_vap; 382170808Sdelphij 383170808Sdelphij struct tmpfs_node *node; 384170808Sdelphij 385170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 386170808Sdelphij 387170808Sdelphij VATTR_NULL(vap); 388170808Sdelphij 389170808Sdelphij tmpfs_update(vp); 390170808Sdelphij 391170808Sdelphij vap->va_type = vp->v_type; 392170808Sdelphij vap->va_mode = node->tn_mode; 393170808Sdelphij vap->va_nlink = node->tn_links; 394170808Sdelphij vap->va_uid = node->tn_uid; 395170808Sdelphij vap->va_gid = node->tn_gid; 396170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 397170808Sdelphij vap->va_fileid = node->tn_id; 398170808Sdelphij vap->va_size = node->tn_size; 399170808Sdelphij vap->va_blocksize = PAGE_SIZE; 400170808Sdelphij vap->va_atime = node->tn_atime; 401170808Sdelphij vap->va_mtime = node->tn_mtime; 402170808Sdelphij vap->va_ctime = node->tn_ctime; 403170808Sdelphij vap->va_birthtime = node->tn_birthtime; 404170808Sdelphij vap->va_gen = node->tn_gen; 405170808Sdelphij vap->va_flags = node->tn_flags; 406170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 407170808Sdelphij node->tn_rdev : VNOVAL; 408170808Sdelphij vap->va_bytes = round_page(node->tn_size); 409170808Sdelphij vap->va_filerev = VNOVAL; 410170808Sdelphij vap->va_vaflags = 0; 411170808Sdelphij vap->va_spare = VNOVAL; /* XXX */ 412170808Sdelphij 413170808Sdelphij return 0; 414170808Sdelphij} 415170808Sdelphij 416170808Sdelphij/* --------------------------------------------------------------------- */ 417170808Sdelphij 418170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 419170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 420170808Sdelphijint 421170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 422170808Sdelphij{ 423170808Sdelphij struct vnode *vp = v->a_vp; 424170808Sdelphij struct vattr *vap = v->a_vap; 425170808Sdelphij struct ucred *cred = v->a_cred; 426170808Sdelphij struct thread *l = v->a_td; 427170808Sdelphij 428170808Sdelphij int error; 429170808Sdelphij 430170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 431170808Sdelphij 432170808Sdelphij error = 0; 433170808Sdelphij 434170808Sdelphij /* Abort if any unsettable attribute is given. */ 435170808Sdelphij if (vap->va_type != VNON || 436170808Sdelphij vap->va_nlink != VNOVAL || 437170808Sdelphij vap->va_fsid != VNOVAL || 438170808Sdelphij vap->va_fileid != VNOVAL || 439170808Sdelphij vap->va_blocksize != VNOVAL || 440170808Sdelphij vap->va_gen != VNOVAL || 441170808Sdelphij vap->va_rdev != VNOVAL || 442170808Sdelphij vap->va_bytes != VNOVAL) 443170808Sdelphij error = EINVAL; 444170808Sdelphij 445170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 446170808Sdelphij error = tmpfs_chflags(vp, vap->va_flags, cred, l); 447170808Sdelphij 448170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 449170808Sdelphij error = tmpfs_chsize(vp, vap->va_size, cred, l); 450170808Sdelphij 451170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 452170808Sdelphij error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, 453170808Sdelphij l); 454170808Sdelphij 455170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 456170808Sdelphij error = tmpfs_chmod(vp, vap->va_mode, cred, l); 457170808Sdelphij 458170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 459170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 460170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 461170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 462170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 463170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 464170808Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 465170808Sdelphij &vap->va_birthtime, vap->va_vaflags, cred, l); 466170808Sdelphij 467170808Sdelphij /* Update the node times. We give preference to the error codes 468170808Sdelphij * generated by this function rather than the ones that may arise 469170808Sdelphij * from tmpfs_update. */ 470170808Sdelphij tmpfs_update(vp); 471170808Sdelphij 472170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 473170808Sdelphij 474170808Sdelphij return error; 475170808Sdelphij} 476170808Sdelphij 477170808Sdelphij/* --------------------------------------------------------------------- */ 478170808Sdelphijstatic int 479170808Sdelphijtmpfs_uio_xfer(struct tmpfs_mount *tmp, struct tmpfs_node *node, 480170808Sdelphij struct uio *uio, vm_object_t uobj) 481170808Sdelphij{ 482170808Sdelphij struct sf_buf *sf; 483170808Sdelphij vm_pindex_t idx; 484170808Sdelphij vm_offset_t d; 485170808Sdelphij vm_page_t m; 486170808Sdelphij size_t len; 487170808Sdelphij int error = 0; 488170808Sdelphij 489170808Sdelphij /* uobj - locked by caller */ 490170808Sdelphij 491170808Sdelphij VM_OBJECT_LOCK(uobj); 492170808Sdelphij vm_object_pip_add(uobj, 1); 493170808Sdelphij while (error == 0 && uio->uio_resid > 0) { 494170808Sdelphij if (node->tn_size <= uio->uio_offset) 495170808Sdelphij break; 496170808Sdelphij 497170808Sdelphij len = MIN(node->tn_size - uio->uio_offset, uio->uio_resid); 498170808Sdelphij if (len == 0) 499170808Sdelphij break; 500170808Sdelphij 501170808Sdelphij idx = OFF_TO_IDX(uio->uio_offset); 502170808Sdelphij d = uio->uio_offset - IDX_TO_OFF(idx); 503170808Sdelphij len = MIN(len, (PAGE_SIZE - d)); 504170808Sdelphij m = vm_page_grab(uobj, idx, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 505170808Sdelphij if (uio->uio_rw == UIO_READ && m->valid != VM_PAGE_BITS_ALL) 506170808Sdelphij if (vm_pager_get_pages(uobj, &m, 1, 0) != VM_PAGER_OK) 507170808Sdelphij vm_page_zero_invalid(m, TRUE); 508170808Sdelphij VM_OBJECT_UNLOCK(uobj); 509170808Sdelphij sched_pin(); 510170808Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 511170808Sdelphij error = uiomove((void *)(sf_buf_kva(sf) + d), len, uio); 512170808Sdelphij sf_buf_free(sf); 513170808Sdelphij sched_unpin(); 514170808Sdelphij VM_OBJECT_LOCK(uobj); 515170808Sdelphij vm_page_lock_queues(); 516170808Sdelphij if (error == 0 && uio->uio_rw == UIO_WRITE) { 517170808Sdelphij vm_page_set_validclean(m, d, len); 518170808Sdelphij vm_page_zero_invalid(m, TRUE); 519170808Sdelphij vm_page_dirty(m); 520170808Sdelphij } 521170808Sdelphij vm_page_activate(m); 522170808Sdelphij vm_page_wakeup(m); 523170808Sdelphij vm_page_unlock_queues(); 524170808Sdelphij } 525170808Sdelphij vm_object_pip_subtract(uobj, 1); 526170808Sdelphij VM_OBJECT_UNLOCK(uobj); 527170808Sdelphij return error; 528170808Sdelphij} 529170808Sdelphij 530170808Sdelphijint 531170808Sdelphijtmpfs_read(struct vop_read_args *v) 532170808Sdelphij{ 533170808Sdelphij struct vnode *vp = v->a_vp; 534170808Sdelphij struct uio *uio = v->a_uio; 535170808Sdelphij 536170808Sdelphij struct tmpfs_node *node; 537170808Sdelphij vm_object_t uobj; 538170808Sdelphij 539170808Sdelphij int error; 540170808Sdelphij 541170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 542170808Sdelphij 543170808Sdelphij if (vp->v_type != VREG) { 544170808Sdelphij error = EISDIR; 545170808Sdelphij goto out; 546170808Sdelphij } 547170808Sdelphij 548170808Sdelphij if (uio->uio_offset < 0) { 549170808Sdelphij error = EINVAL; 550170808Sdelphij goto out; 551170808Sdelphij } 552170808Sdelphij 553170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 554170808Sdelphij 555170808Sdelphij uobj = node->tn_reg.tn_aobj; 556170808Sdelphij error = tmpfs_uio_xfer(VFS_TO_TMPFS(vp->v_mount), node, uio, uobj); 557170808Sdelphij 558170808Sdelphijout: 559170808Sdelphij 560170808Sdelphij return error; 561170808Sdelphij} 562170808Sdelphij 563170808Sdelphij/* --------------------------------------------------------------------- */ 564170808Sdelphij 565170808Sdelphijint 566170808Sdelphijtmpfs_write(struct vop_write_args *v) 567170808Sdelphij{ 568170808Sdelphij struct vnode *vp = v->a_vp; 569170808Sdelphij struct uio *uio = v->a_uio; 570170808Sdelphij int ioflag = v->a_ioflag; 571170808Sdelphij struct thread *td = uio->uio_td; 572170808Sdelphij 573170808Sdelphij boolean_t extended; 574170808Sdelphij int error; 575170808Sdelphij off_t oldsize; 576170808Sdelphij struct tmpfs_node *node; 577170808Sdelphij vm_object_t uobj; 578170808Sdelphij 579170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 580170808Sdelphij oldsize = node->tn_size; 581170808Sdelphij 582170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 583170808Sdelphij error = EINVAL; 584170808Sdelphij goto out; 585170808Sdelphij } 586170808Sdelphij 587170808Sdelphij if (uio->uio_resid == 0) { 588170808Sdelphij error = 0; 589170808Sdelphij goto out; 590170808Sdelphij } 591170808Sdelphij 592170808Sdelphij if (ioflag & IO_APPEND) 593170808Sdelphij uio->uio_offset = node->tn_size; 594170808Sdelphij 595170808Sdelphij if (uio->uio_offset + uio->uio_resid > 596170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 597170808Sdelphij return (EFBIG); 598170808Sdelphij 599170808Sdelphij if (vp->v_type == VREG && td != NULL) { 600170808Sdelphij PROC_LOCK(td->td_proc); 601170808Sdelphij if (uio->uio_offset + uio->uio_resid > 602170808Sdelphij lim_cur(td->td_proc, RLIMIT_FSIZE)) { 603170808Sdelphij psignal(td->td_proc, SIGXFSZ); 604170808Sdelphij PROC_UNLOCK(td->td_proc); 605170808Sdelphij return (EFBIG); 606170808Sdelphij } 607170808Sdelphij PROC_UNLOCK(td->td_proc); 608170808Sdelphij } 609170808Sdelphij 610170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 611170808Sdelphij if (extended) { 612170808Sdelphij error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid); 613170808Sdelphij if (error != 0) 614170808Sdelphij goto out; 615170808Sdelphij } 616170808Sdelphij 617170808Sdelphij uobj = node->tn_reg.tn_aobj; 618170808Sdelphij error = tmpfs_uio_xfer(VFS_TO_TMPFS(vp->v_mount), node, uio, uobj); 619170808Sdelphij 620170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 621170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 622170808Sdelphij 623170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 624170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 625170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 626170808Sdelphij } 627170808Sdelphij 628170808Sdelphij if (error != 0) 629170808Sdelphij (void)tmpfs_reg_resize(vp, oldsize); 630170808Sdelphij 631170808Sdelphijout: 632170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 633170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 634170808Sdelphij 635170808Sdelphij return error; 636170808Sdelphij} 637170808Sdelphij 638170808Sdelphij/* --------------------------------------------------------------------- */ 639170808Sdelphij 640170808Sdelphijint 641170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 642170808Sdelphij{ 643170808Sdelphij struct vnode *vp = v->a_vp; 644170808Sdelphij 645170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_td)); 646170808Sdelphij 647170808Sdelphij tmpfs_update(vp); 648170808Sdelphij 649170808Sdelphij return 0; 650170808Sdelphij} 651170808Sdelphij 652170808Sdelphij/* --------------------------------------------------------------------- */ 653170808Sdelphij 654170808Sdelphijint 655170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 656170808Sdelphij{ 657170808Sdelphij struct vnode *dvp = v->a_dvp; 658170808Sdelphij struct vnode *vp = v->a_vp; 659170808Sdelphij 660170808Sdelphij int error; 661170808Sdelphij struct tmpfs_dirent *de; 662170808Sdelphij struct tmpfs_mount *tmp; 663170808Sdelphij struct tmpfs_node *dnode; 664170808Sdelphij struct tmpfs_node *node; 665170808Sdelphij 666170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 667170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 668170808Sdelphij 669170808Sdelphij if (vp->v_type == VDIR) { 670170808Sdelphij error = EISDIR; 671170808Sdelphij goto out; 672170808Sdelphij } 673170808Sdelphij 674170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 675170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 676170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 677170808Sdelphij de = node->tn_lookup_dirent; 678170808Sdelphij MPASS(de != NULL); 679170808Sdelphij 680170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 681170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 682170808Sdelphij (dnode->tn_flags & APPEND)) { 683170808Sdelphij error = EPERM; 684170808Sdelphij goto out; 685170808Sdelphij } 686170808Sdelphij 687170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 688170808Sdelphij * have to change the number of hard links of the directory. */ 689170808Sdelphij tmpfs_dir_detach(dvp, de); 690170808Sdelphij 691170808Sdelphij /* Free the directory entry we just deleted. Note that the node 692170808Sdelphij * referred by it will not be removed until the vnode is really 693170808Sdelphij * reclaimed. */ 694170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 695170808Sdelphij 696170808Sdelphij if (node->tn_links > 0) 697170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 698170808Sdelphij TMPFS_NODE_MODIFIED; 699170808Sdelphij error = 0; 700170808Sdelphij 701170808Sdelphijout: 702170808Sdelphij 703170808Sdelphij return error; 704170808Sdelphij} 705170808Sdelphij 706170808Sdelphij/* --------------------------------------------------------------------- */ 707170808Sdelphij 708170808Sdelphijint 709170808Sdelphijtmpfs_link(struct vop_link_args *v) 710170808Sdelphij{ 711170808Sdelphij struct vnode *dvp = v->a_tdvp; 712170808Sdelphij struct vnode *vp = v->a_vp; 713170808Sdelphij struct componentname *cnp = v->a_cnp; 714170808Sdelphij 715170808Sdelphij int error; 716170808Sdelphij struct tmpfs_dirent *de; 717170808Sdelphij struct tmpfs_node *dnode; 718170808Sdelphij struct tmpfs_node *node; 719170808Sdelphij 720170808Sdelphij MPASS(VOP_ISLOCKED(dvp, cnp->cn_thread)); 721170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 722170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 723170808Sdelphij 724170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 725170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 726170808Sdelphij 727170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 728170808Sdelphij 729170808Sdelphij /* Hard links of directories are forbidden. */ 730170808Sdelphij if (vp->v_type == VDIR) { 731170808Sdelphij error = EPERM; 732170808Sdelphij goto out; 733170808Sdelphij } 734170808Sdelphij 735170808Sdelphij /* Cannot create cross-device links. */ 736170808Sdelphij if (dvp->v_mount != vp->v_mount) { 737170808Sdelphij error = EXDEV; 738170808Sdelphij goto out; 739170808Sdelphij } 740170808Sdelphij 741170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 742170808Sdelphij * by the system. */ 743170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 744170808Sdelphij if (node->tn_links == LINK_MAX) { 745170808Sdelphij error = EMLINK; 746170808Sdelphij goto out; 747170808Sdelphij } 748170808Sdelphij 749170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 750170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 751170808Sdelphij error = EPERM; 752170808Sdelphij goto out; 753170808Sdelphij } 754170808Sdelphij 755170808Sdelphij /* Allocate a new directory entry to represent the node. */ 756170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 757170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 758170808Sdelphij if (error != 0) 759170808Sdelphij goto out; 760170808Sdelphij 761170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 762170808Sdelphij tmpfs_dir_attach(dvp, de); 763170808Sdelphij 764170808Sdelphij /* vp link count has changed, so update node times. */ 765170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 766170808Sdelphij tmpfs_update(vp); 767170808Sdelphij 768170808Sdelphij error = 0; 769170808Sdelphijout: 770170808Sdelphij 771170808Sdelphij return error; 772170808Sdelphij} 773170808Sdelphij 774170808Sdelphij/* --------------------------------------------------------------------- */ 775170808Sdelphij 776170808Sdelphijint 777170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 778170808Sdelphij{ 779170808Sdelphij struct vnode *fdvp = v->a_fdvp; 780170808Sdelphij struct vnode *fvp = v->a_fvp; 781170808Sdelphij struct componentname *fcnp = v->a_fcnp; 782170808Sdelphij struct vnode *tdvp = v->a_tdvp; 783170808Sdelphij struct vnode *tvp = v->a_tvp; 784170808Sdelphij struct componentname *tcnp = v->a_tcnp; 785170808Sdelphij struct tmpfs_node *tnode = 0; /* pacify gcc */ 786170808Sdelphij 787170808Sdelphij char *newname; 788170808Sdelphij int error; 789170808Sdelphij struct tmpfs_dirent *de; 790170808Sdelphij struct tmpfs_mount *tmp; 791170808Sdelphij struct tmpfs_node *fdnode; 792170808Sdelphij struct tmpfs_node *fnode; 793170808Sdelphij struct tmpfs_node *tdnode; 794170808Sdelphij 795170808Sdelphij MPASS(VOP_ISLOCKED(tdvp, tcnp->cn_thread)); 796170808Sdelphij MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp, tcnp->cn_thread))); 797170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 798170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 799170808Sdelphij 800170808Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 801170808Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 802170808Sdelphij de = fnode->tn_lookup_dirent; 803170808Sdelphij 804170808Sdelphij /* Disallow cross-device renames. 805170808Sdelphij * XXX Why isn't this done by the caller? */ 806170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 807170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 808170808Sdelphij error = EXDEV; 809170808Sdelphij goto out; 810170808Sdelphij } 811170808Sdelphij 812170808Sdelphij tmp = VFS_TO_TMPFS(tdvp->v_mount); 813170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 814170808Sdelphij 815170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 816170808Sdelphij if (fvp == tvp) { 817170808Sdelphij error = 0; 818170808Sdelphij goto out; 819170808Sdelphij } 820170808Sdelphij 821170808Sdelphij /* Avoid manipulating '.' and '..' entries. */ 822170808Sdelphij if (de == NULL) { 823170808Sdelphij MPASS(fvp->v_type == VDIR); 824170808Sdelphij error = EINVAL; 825170808Sdelphij goto out; 826170808Sdelphij } 827170808Sdelphij MPASS(de->td_node == fnode); 828170808Sdelphij 829170808Sdelphij /* If re-naming a directory to another preexisting directory 830170808Sdelphij * ensure that the target directory is empty so that its 831170808Sdelphij * removal causes no side effects. 832170808Sdelphij * Kern_rename gurantees the destination to be a directory 833170808Sdelphij * if the source is one. */ 834170808Sdelphij if (tvp != NULL) { 835170808Sdelphij tnode = VP_TO_TMPFS_NODE(tvp); 836170808Sdelphij 837170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 838170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 839170808Sdelphij error = EPERM; 840170808Sdelphij goto out; 841170808Sdelphij } 842170808Sdelphij 843170808Sdelphij if ((de->td_node->tn_type == VDIR) && (tnode->tn_size > 0)) { 844170808Sdelphij error = ENOTEMPTY; 845170808Sdelphij goto out; 846170808Sdelphij } 847170808Sdelphij } 848170808Sdelphij 849170808Sdelphij /* If we need to move the directory between entries, lock the 850170808Sdelphij * source so that we can safely operate on it. */ 851170808Sdelphij if (fdnode != tdnode) { 852170808Sdelphij error = vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY, tcnp->cn_thread); 853170808Sdelphij if (error != 0) 854170808Sdelphij goto out; 855170808Sdelphij } 856170808Sdelphij 857170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 858170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 859170808Sdelphij error = EPERM; 860170808Sdelphij goto out_locked; 861170808Sdelphij } 862170808Sdelphij 863170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 864170808Sdelphij * has to be changed. */ 865170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 866170808Sdelphij memcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 867170808Sdelphij newname = tmpfs_str_zone_alloc(&tmp->tm_str_pool, M_WAITOK, 868170808Sdelphij tcnp->cn_namelen); 869170808Sdelphij if (newname == NULL) { 870170808Sdelphij error = ENOSPC; 871170808Sdelphij goto out_locked; 872170808Sdelphij } 873170808Sdelphij } else 874170808Sdelphij newname = NULL; 875170808Sdelphij 876170808Sdelphij /* If the node is being moved to another directory, we have to do 877170808Sdelphij * the move. */ 878170808Sdelphij if (fdnode != tdnode) { 879170808Sdelphij /* In case we are moving a directory, we have to adjust its 880170808Sdelphij * parent to point to the new parent. */ 881170808Sdelphij if (de->td_node->tn_type == VDIR) { 882170808Sdelphij struct tmpfs_node *n; 883170808Sdelphij 884170808Sdelphij /* Ensure the target directory is not a child of the 885170808Sdelphij * directory being moved. Otherwise, we'd end up 886170808Sdelphij * with stale nodes. */ 887170808Sdelphij n = tdnode; 888170808Sdelphij while (n != n->tn_dir.tn_parent) { 889170808Sdelphij if (n == fnode) { 890170808Sdelphij error = EINVAL; 891170808Sdelphij if (newname != NULL) 892170808Sdelphij tmpfs_str_zone_free(&tmp->tm_str_pool, 893170808Sdelphij newname, tcnp->cn_namelen); 894170808Sdelphij goto out_locked; 895170808Sdelphij } 896170808Sdelphij n = n->tn_dir.tn_parent; 897170808Sdelphij } 898170808Sdelphij 899170808Sdelphij /* Adjust the parent pointer. */ 900170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 901170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 902170808Sdelphij 903170808Sdelphij /* As a result of changing the target of the '..' 904170808Sdelphij * entry, the link count of the source and target 905170808Sdelphij * directories has to be adjusted. */ 906170808Sdelphij fdnode->tn_links--; 907170808Sdelphij tdnode->tn_links++; 908170808Sdelphij } 909170808Sdelphij 910170808Sdelphij /* Do the move: just remove the entry from the source directory 911170808Sdelphij * and insert it into the target one. */ 912170808Sdelphij tmpfs_dir_detach(fdvp, de); 913170808Sdelphij tmpfs_dir_attach(tdvp, de); 914170808Sdelphij } 915170808Sdelphij 916170808Sdelphij /* If the name has changed, we need to make it effective by changing 917170808Sdelphij * it in the directory entry. */ 918170808Sdelphij if (newname != NULL) { 919170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 920170808Sdelphij 921170808Sdelphij tmpfs_str_zone_free(&tmp->tm_str_pool, de->td_name, 922170808Sdelphij de->td_namelen); 923170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 924170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 925170808Sdelphij de->td_name = newname; 926170808Sdelphij 927170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 928170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 929170808Sdelphij } 930170808Sdelphij 931170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 932170808Sdelphij * from the target directory. */ 933170808Sdelphij if (tvp != NULL) { 934170808Sdelphij /* Remove the old entry from the target directory. */ 935170808Sdelphij de = tnode->tn_lookup_dirent; 936170808Sdelphij tmpfs_dir_detach(tdvp, de); 937170808Sdelphij 938170808Sdelphij /* Free the directory entry we just deleted. Note that the 939170808Sdelphij * node referred by it will not be removed until the vnode is 940170808Sdelphij * really reclaimed. */ 941170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 942170808Sdelphij } 943170808Sdelphij 944170808Sdelphij error = 0; 945170808Sdelphij 946170808Sdelphijout_locked: 947170808Sdelphij if (fdnode != tdnode) 948170808Sdelphij VOP_UNLOCK(fdvp, 0, tcnp->cn_thread); 949170808Sdelphij 950170808Sdelphijout: 951170808Sdelphij /* Release target nodes. */ 952170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 953170808Sdelphij * other code takes care of this... */ 954170808Sdelphij if (tdvp == tvp) 955170808Sdelphij vrele(tdvp); 956170808Sdelphij else 957170808Sdelphij vput(tdvp); 958170808Sdelphij if (tvp != NULL) 959170808Sdelphij vput(tvp); 960170808Sdelphij 961170808Sdelphij /* Release source nodes. */ 962170808Sdelphij vrele(fdvp); 963170808Sdelphij vrele(fvp); 964170808Sdelphij 965170808Sdelphij return error; 966170808Sdelphij} 967170808Sdelphij 968170808Sdelphij/* --------------------------------------------------------------------- */ 969170808Sdelphij 970170808Sdelphijint 971170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 972170808Sdelphij{ 973170808Sdelphij struct vnode *dvp = v->a_dvp; 974170808Sdelphij struct vnode **vpp = v->a_vpp; 975170808Sdelphij struct componentname *cnp = v->a_cnp; 976170808Sdelphij struct vattr *vap = v->a_vap; 977170808Sdelphij 978170808Sdelphij MPASS(vap->va_type == VDIR); 979170808Sdelphij 980170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 981170808Sdelphij} 982170808Sdelphij 983170808Sdelphij/* --------------------------------------------------------------------- */ 984170808Sdelphij 985170808Sdelphijint 986170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 987170808Sdelphij{ 988170808Sdelphij struct vnode *dvp = v->a_dvp; 989170808Sdelphij struct vnode *vp = v->a_vp; 990170808Sdelphij 991170808Sdelphij int error; 992170808Sdelphij struct tmpfs_dirent *de; 993170808Sdelphij struct tmpfs_mount *tmp; 994170808Sdelphij struct tmpfs_node *dnode; 995170808Sdelphij struct tmpfs_node *node; 996170808Sdelphij 997170808Sdelphij MPASS(VOP_ISLOCKED(dvp, v->a_cnp->cn_thread)); 998170808Sdelphij MPASS(VOP_ISLOCKED(vp, v->a_cnp->cn_thread)); 999170808Sdelphij 1000170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1001170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1002170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1003170808Sdelphij 1004170808Sdelphij 1005170808Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1006170808Sdelphij * removed. */ 1007170808Sdelphij if (node->tn_size > 0) { 1008170808Sdelphij error = ENOTEMPTY; 1009170808Sdelphij goto out; 1010170808Sdelphij } 1011170808Sdelphij 1012170808Sdelphij if ((dnode->tn_flags & APPEND) 1013170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1014170808Sdelphij error = EPERM; 1015170808Sdelphij goto out; 1016170808Sdelphij } 1017170808Sdelphij 1018170808Sdelphij /* This invariant holds only if we are not trying to remove "..". 1019170808Sdelphij * We checked for that above so this is safe now. */ 1020170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1021170808Sdelphij 1022170808Sdelphij /* Get the directory entry associated with node (vp). This was 1023170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1024170808Sdelphij de = node->tn_lookup_dirent; 1025170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1026170808Sdelphij v->a_cnp->cn_nameptr, 1027170808Sdelphij v->a_cnp->cn_namelen)); 1028170808Sdelphij 1029170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1030170808Sdelphij if (dnode->tn_flags & APPEND 1031170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1032170808Sdelphij error = EPERM; 1033170808Sdelphij goto out; 1034170808Sdelphij } 1035170808Sdelphij 1036170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1037170808Sdelphij tmpfs_dir_detach(dvp, de); 1038170808Sdelphij 1039170808Sdelphij node->tn_links--; 1040170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1041170808Sdelphij TMPFS_NODE_MODIFIED; 1042170808Sdelphij node->tn_dir.tn_parent->tn_links--; 1043170808Sdelphij node->tn_dir.tn_parent->tn_status |= TMPFS_NODE_ACCESSED | \ 1044170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1045170808Sdelphij 1046170808Sdelphij cache_purge(dvp); 1047170808Sdelphij cache_purge(vp); 1048170808Sdelphij 1049170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1050170808Sdelphij * referred by it will not be removed until the vnode is really 1051170808Sdelphij * reclaimed. */ 1052170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1053170808Sdelphij 1054170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1055170808Sdelphij * interested parties and clean it from the cache). */ 1056170808Sdelphij 1057170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1058170808Sdelphij tmpfs_update(dvp); 1059170808Sdelphij 1060170808Sdelphij error = 0; 1061170808Sdelphij 1062170808Sdelphijout: 1063170808Sdelphij return error; 1064170808Sdelphij} 1065170808Sdelphij 1066170808Sdelphij/* --------------------------------------------------------------------- */ 1067170808Sdelphij 1068170808Sdelphijint 1069170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1070170808Sdelphij{ 1071170808Sdelphij struct vnode *dvp = v->a_dvp; 1072170808Sdelphij struct vnode **vpp = v->a_vpp; 1073170808Sdelphij struct componentname *cnp = v->a_cnp; 1074170808Sdelphij struct vattr *vap = v->a_vap; 1075170808Sdelphij char *target = v->a_target; 1076170808Sdelphij 1077170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1078170808Sdelphij MPASS(vap->va_type == VLNK); 1079170808Sdelphij#else 1080170808Sdelphij vap->va_type = VLNK; 1081170808Sdelphij#endif 1082170808Sdelphij 1083170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1084170808Sdelphij} 1085170808Sdelphij 1086170808Sdelphij/* --------------------------------------------------------------------- */ 1087170808Sdelphij 1088170808Sdelphijint 1089170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1090170808Sdelphij{ 1091170808Sdelphij struct vnode *vp = v->a_vp; 1092170808Sdelphij struct uio *uio = v->a_uio; 1093170808Sdelphij int *eofflag = v->a_eofflag; 1094170808Sdelphij u_long **cookies = v->a_cookies; 1095170808Sdelphij int *ncookies = v->a_ncookies; 1096170808Sdelphij 1097170808Sdelphij int error; 1098170808Sdelphij off_t startoff; 1099170808Sdelphij off_t cnt; 1100170808Sdelphij struct tmpfs_node *node; 1101170808Sdelphij 1102170808Sdelphij /* This operation only makes sense on directory nodes. */ 1103170808Sdelphij if (vp->v_type != VDIR) { 1104170808Sdelphij error = ENOTDIR; 1105170808Sdelphij goto out; 1106170808Sdelphij } 1107170808Sdelphij 1108170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1109170808Sdelphij 1110170808Sdelphij startoff = uio->uio_offset; 1111170808Sdelphij 1112170808Sdelphij cnt = 0; 1113170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1114170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1115170808Sdelphij if (error == -1) { 1116170808Sdelphij error = 0; 1117170808Sdelphij goto outok; 1118170808Sdelphij } else if (error != 0) 1119170808Sdelphij goto outok; 1120170808Sdelphij cnt++; 1121170808Sdelphij } 1122170808Sdelphij 1123170808Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1124170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1125170808Sdelphij if (error == -1) { 1126170808Sdelphij error = 0; 1127170808Sdelphij goto outok; 1128170808Sdelphij } else if (error != 0) 1129170808Sdelphij goto outok; 1130170808Sdelphij cnt++; 1131170808Sdelphij } 1132170808Sdelphij 1133170808Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1134170808Sdelphij if (error == -1) 1135170808Sdelphij error = 0; 1136170808Sdelphij MPASS(error >= 0); 1137170808Sdelphij 1138170808Sdelphijoutok: 1139170808Sdelphij /* This label assumes that startoff has been 1140170808Sdelphij * initialized. If the compiler didn't spit out warnings, we'd 1141170808Sdelphij * simply make this one be 'out' and drop 'outok'. */ 1142170808Sdelphij 1143170808Sdelphij if (eofflag != NULL) 1144170808Sdelphij *eofflag = 1145170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1146170808Sdelphij 1147170808Sdelphij /* Update NFS-related variables. */ 1148170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1149170808Sdelphij off_t i; 1150170808Sdelphij off_t off = startoff; 1151170808Sdelphij struct tmpfs_dirent *de = NULL; 1152170808Sdelphij 1153170808Sdelphij *ncookies = cnt; 1154170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1155170808Sdelphij 1156170808Sdelphij for (i = 0; i < cnt; i++) { 1157170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1158170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1159170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1160170808Sdelphij } else { 1161170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1162170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1163170808Sdelphij } else if (de != NULL) { 1164170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1165170808Sdelphij } else { 1166170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1167170808Sdelphij off); 1168170808Sdelphij MPASS(de != NULL); 1169170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1170170808Sdelphij } 1171170808Sdelphij if (de == NULL) { 1172170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1173170808Sdelphij } else { 1174170808Sdelphij off = TMPFS_DIRCOOKIE(de); 1175170808Sdelphij } 1176170808Sdelphij } 1177170808Sdelphij 1178170808Sdelphij (*cookies)[i] = off; 1179170808Sdelphij } 1180170808Sdelphij MPASS(uio->uio_offset == off); 1181170808Sdelphij } 1182170808Sdelphij 1183170808Sdelphijout: 1184170808Sdelphij return error; 1185170808Sdelphij} 1186170808Sdelphij 1187170808Sdelphij/* --------------------------------------------------------------------- */ 1188170808Sdelphij 1189170808Sdelphijint 1190170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1191170808Sdelphij{ 1192170808Sdelphij struct vnode *vp = v->a_vp; 1193170808Sdelphij struct uio *uio = v->a_uio; 1194170808Sdelphij 1195170808Sdelphij int error; 1196170808Sdelphij struct tmpfs_node *node; 1197170808Sdelphij 1198170808Sdelphij MPASS(uio->uio_offset == 0); 1199170808Sdelphij MPASS(vp->v_type == VLNK); 1200170808Sdelphij 1201170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1202170808Sdelphij 1203170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1204170808Sdelphij uio); 1205170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1206170808Sdelphij 1207170808Sdelphij return error; 1208170808Sdelphij} 1209170808Sdelphij 1210170808Sdelphij/* --------------------------------------------------------------------- */ 1211170808Sdelphij 1212170808Sdelphijint 1213170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1214170808Sdelphij{ 1215170808Sdelphij struct vnode *vp = v->a_vp; 1216170808Sdelphij struct thread *l = v->a_td; 1217170808Sdelphij 1218170808Sdelphij struct tmpfs_node *node; 1219170808Sdelphij 1220170808Sdelphij MPASS(VOP_ISLOCKED(vp, l)); 1221170808Sdelphij 1222170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1223170808Sdelphij 1224170808Sdelphij if (node->tn_links == 0) 1225170808Sdelphij vrecycle(vp, l); 1226170808Sdelphij 1227170808Sdelphij return 0; 1228170808Sdelphij} 1229170808Sdelphij 1230170808Sdelphij/* --------------------------------------------------------------------- */ 1231170808Sdelphij 1232170808Sdelphijint 1233170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1234170808Sdelphij{ 1235170808Sdelphij struct vnode *vp = v->a_vp; 1236170808Sdelphij 1237170808Sdelphij struct tmpfs_mount *tmp; 1238170808Sdelphij struct tmpfs_node *node; 1239170808Sdelphij 1240170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1241170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1242170808Sdelphij 1243170808Sdelphij vnode_destroy_vobject(vp); 1244170808Sdelphij cache_purge(vp); 1245170808Sdelphij tmpfs_free_vp(vp); 1246170808Sdelphij 1247170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1248170808Sdelphij * we must free its associated data structures (now that the vnode 1249170808Sdelphij * is being reclaimed). */ 1250170808Sdelphij if (node->tn_links == 0) 1251170808Sdelphij tmpfs_free_node(tmp, node); 1252170808Sdelphij 1253170808Sdelphij MPASS(vp->v_data == NULL); 1254170808Sdelphij return 0; 1255170808Sdelphij} 1256170808Sdelphij 1257170808Sdelphij/* --------------------------------------------------------------------- */ 1258170808Sdelphij 1259170808Sdelphijint 1260170808Sdelphijtmpfs_print(struct vop_print_args *v) 1261170808Sdelphij{ 1262170808Sdelphij struct vnode *vp = v->a_vp; 1263170808Sdelphij 1264170808Sdelphij struct tmpfs_node *node; 1265170808Sdelphij 1266170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1267170808Sdelphij 1268170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1269170808Sdelphij node, node->tn_flags, node->tn_links); 1270170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1271170808Sdelphij ", status 0x%x\n", 1272170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1273170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1274170808Sdelphij 1275170808Sdelphij if (vp->v_type == VFIFO) 1276170808Sdelphij fifo_printinfo(vp); 1277170808Sdelphij 1278170808Sdelphij printf("\n"); 1279170808Sdelphij 1280170808Sdelphij return 0; 1281170808Sdelphij} 1282170808Sdelphij 1283170808Sdelphij/* --------------------------------------------------------------------- */ 1284170808Sdelphij 1285170808Sdelphijint 1286170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1287170808Sdelphij{ 1288170808Sdelphij int name = v->a_name; 1289170808Sdelphij register_t *retval = v->a_retval; 1290170808Sdelphij 1291170808Sdelphij int error; 1292170808Sdelphij 1293170808Sdelphij error = 0; 1294170808Sdelphij 1295170808Sdelphij switch (name) { 1296170808Sdelphij case _PC_LINK_MAX: 1297170808Sdelphij *retval = LINK_MAX; 1298170808Sdelphij break; 1299170808Sdelphij 1300170808Sdelphij case _PC_NAME_MAX: 1301170808Sdelphij *retval = NAME_MAX; 1302170808Sdelphij break; 1303170808Sdelphij 1304170808Sdelphij case _PC_PATH_MAX: 1305170808Sdelphij *retval = PATH_MAX; 1306170808Sdelphij break; 1307170808Sdelphij 1308170808Sdelphij case _PC_PIPE_BUF: 1309170808Sdelphij *retval = PIPE_BUF; 1310170808Sdelphij break; 1311170808Sdelphij 1312170808Sdelphij case _PC_CHOWN_RESTRICTED: 1313170808Sdelphij *retval = 1; 1314170808Sdelphij break; 1315170808Sdelphij 1316170808Sdelphij case _PC_NO_TRUNC: 1317170808Sdelphij *retval = 1; 1318170808Sdelphij break; 1319170808Sdelphij 1320170808Sdelphij case _PC_SYNC_IO: 1321170808Sdelphij *retval = 1; 1322170808Sdelphij break; 1323170808Sdelphij 1324170808Sdelphij case _PC_FILESIZEBITS: 1325170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1326170808Sdelphij break; 1327170808Sdelphij 1328170808Sdelphij default: 1329170808Sdelphij error = EINVAL; 1330170808Sdelphij } 1331170808Sdelphij 1332170808Sdelphij return error; 1333170808Sdelphij} 1334170808Sdelphij 1335170808Sdelphij/* --------------------------------------------------------------------- */ 1336170808Sdelphij 1337170808Sdelphijint 1338170808Sdelphijtmpfs_advlock(struct vop_advlock_args *v) 1339170808Sdelphij{ 1340170808Sdelphij struct vnode *vp = v->a_vp; 1341170808Sdelphij 1342170808Sdelphij struct tmpfs_node *node; 1343170808Sdelphij 1344170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1345170808Sdelphij 1346170808Sdelphij return lf_advlock(v, &node->tn_lockf, node->tn_size); 1347170808Sdelphij} 1348170808Sdelphij 1349170808Sdelphij/* --------------------------------------------------------------------- */ 1350170808Sdelphij 1351170808Sdelphijint 1352170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1353170808Sdelphij{ 1354170808Sdelphij struct tmpfs_fid *tfhp; 1355170808Sdelphij struct tmpfs_node *node; 1356170808Sdelphij 1357170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1358170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1359170808Sdelphij 1360170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1361170808Sdelphij tfhp->tf_id = node->tn_id; 1362170808Sdelphij tfhp->tf_gen = node->tn_gen; 1363170808Sdelphij 1364170808Sdelphij return (0); 1365170808Sdelphij} 1366