tmpfs_vnops.c revision 230180
1171802Sdelphij/* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ 2170808Sdelphij 3182739Sdelphij/*- 4171802Sdelphij * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. 5170808Sdelphij * All rights reserved. 6170808Sdelphij * 7170808Sdelphij * This code is derived from software contributed to The NetBSD Foundation 8170808Sdelphij * by Julio M. Merino Vidal, developed as part of Google's Summer of Code 9170808Sdelphij * 2005 program. 10170808Sdelphij * 11170808Sdelphij * Redistribution and use in source and binary forms, with or without 12170808Sdelphij * modification, are permitted provided that the following conditions 13170808Sdelphij * are met: 14170808Sdelphij * 1. Redistributions of source code must retain the above copyright 15170808Sdelphij * notice, this list of conditions and the following disclaimer. 16170808Sdelphij * 2. Redistributions in binary form must reproduce the above copyright 17170808Sdelphij * notice, this list of conditions and the following disclaimer in the 18170808Sdelphij * documentation and/or other materials provided with the distribution. 19170808Sdelphij * 20170808Sdelphij * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21170808Sdelphij * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22170808Sdelphij * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23170808Sdelphij * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24170808Sdelphij * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25170808Sdelphij * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26170808Sdelphij * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27170808Sdelphij * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28170808Sdelphij * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29170808Sdelphij * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30170808Sdelphij * POSSIBILITY OF SUCH DAMAGE. 31170808Sdelphij */ 32170808Sdelphij 33170808Sdelphij/* 34170808Sdelphij * tmpfs vnode interface. 35170808Sdelphij */ 36170808Sdelphij#include <sys/cdefs.h> 37170808Sdelphij__FBSDID("$FreeBSD: head/sys/fs/tmpfs/tmpfs_vnops.c 230180 2012-01-16 00:26:49Z alc $"); 38170808Sdelphij 39170808Sdelphij#include <sys/param.h> 40170808Sdelphij#include <sys/fcntl.h> 41170808Sdelphij#include <sys/lockf.h> 42170808Sdelphij#include <sys/namei.h> 43170808Sdelphij#include <sys/priv.h> 44170808Sdelphij#include <sys/proc.h> 45197850Sdelphij#include <sys/sched.h> 46197850Sdelphij#include <sys/sf_buf.h> 47170808Sdelphij#include <sys/stat.h> 48170808Sdelphij#include <sys/systm.h> 49170808Sdelphij#include <sys/unistd.h> 50170808Sdelphij#include <sys/vnode.h> 51170808Sdelphij 52170808Sdelphij#include <vm/vm.h> 53170808Sdelphij#include <vm/vm_object.h> 54170808Sdelphij#include <vm/vm_page.h> 55170808Sdelphij#include <vm/vm_pager.h> 56188929Salc 57170808Sdelphij#include <machine/_inttypes.h> 58170808Sdelphij 59170808Sdelphij#include <fs/fifofs/fifo.h> 60170808Sdelphij#include <fs/tmpfs/tmpfs_vnops.h> 61170808Sdelphij#include <fs/tmpfs/tmpfs.h> 62170808Sdelphij 63170808Sdelphij/* --------------------------------------------------------------------- */ 64170808Sdelphij 65171069Sdelphijstatic int 66170808Sdelphijtmpfs_lookup(struct vop_cachedlookup_args *v) 67170808Sdelphij{ 68170808Sdelphij struct vnode *dvp = v->a_dvp; 69170808Sdelphij struct vnode **vpp = v->a_vpp; 70170808Sdelphij struct componentname *cnp = v->a_cnp; 71170808Sdelphij 72170808Sdelphij int error; 73170808Sdelphij struct tmpfs_dirent *de; 74170808Sdelphij struct tmpfs_node *dnode; 75170808Sdelphij 76170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 77170808Sdelphij *vpp = NULLVP; 78170808Sdelphij 79170808Sdelphij /* Check accessibility of requested node as a first step. */ 80191990Sattilio error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_thread); 81170808Sdelphij if (error != 0) 82170808Sdelphij goto out; 83170808Sdelphij 84170808Sdelphij /* We cannot be requesting the parent directory of the root node. */ 85170808Sdelphij MPASS(IMPLIES(dnode->tn_type == VDIR && 86170808Sdelphij dnode->tn_dir.tn_parent == dnode, 87170808Sdelphij !(cnp->cn_flags & ISDOTDOT))); 88170808Sdelphij 89197953Sdelphij TMPFS_ASSERT_LOCKED(dnode); 90197953Sdelphij if (dnode->tn_dir.tn_parent == NULL) { 91197953Sdelphij error = ENOENT; 92197953Sdelphij goto out; 93197953Sdelphij } 94170808Sdelphij if (cnp->cn_flags & ISDOTDOT) { 95171799Sdelphij int ltype = 0; 96171799Sdelphij 97176559Sattilio ltype = VOP_ISLOCKED(dvp); 98171802Sdelphij vhold(dvp); 99175294Sattilio VOP_UNLOCK(dvp, 0); 100170808Sdelphij /* Allocate a new vnode on the matching entry. */ 101171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, dnode->tn_dir.tn_parent, 102191990Sattilio cnp->cn_lkflags, vpp); 103170808Sdelphij 104175202Sattilio vn_lock(dvp, ltype | LK_RETRY); 105171802Sdelphij vdrop(dvp); 106170808Sdelphij } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 107170808Sdelphij VREF(dvp); 108170808Sdelphij *vpp = dvp; 109170808Sdelphij error = 0; 110170808Sdelphij } else { 111188318Skib de = tmpfs_dir_lookup(dnode, NULL, cnp); 112211598Sed if (de != NULL && de->td_node == NULL) 113211598Sed cnp->cn_flags |= ISWHITEOUT; 114211598Sed if (de == NULL || de->td_node == NULL) { 115170808Sdelphij /* The entry was not found in the directory. 116170808Sdelphij * This is OK if we are creating or renaming an 117170808Sdelphij * entry and are working on the last component of 118170808Sdelphij * the path name. */ 119170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 120170808Sdelphij (cnp->cn_nameiop == CREATE || \ 121211598Sed cnp->cn_nameiop == RENAME || 122211598Sed (cnp->cn_nameiop == DELETE && 123211598Sed cnp->cn_flags & DOWHITEOUT && 124211598Sed cnp->cn_flags & ISWHITEOUT))) { 125170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 126170808Sdelphij cnp->cn_thread); 127170808Sdelphij if (error != 0) 128170808Sdelphij goto out; 129170808Sdelphij 130170808Sdelphij /* Keep the component name in the buffer for 131170808Sdelphij * future uses. */ 132170808Sdelphij cnp->cn_flags |= SAVENAME; 133170808Sdelphij 134170808Sdelphij error = EJUSTRETURN; 135170808Sdelphij } else 136170808Sdelphij error = ENOENT; 137170808Sdelphij } else { 138170808Sdelphij struct tmpfs_node *tnode; 139170808Sdelphij 140170808Sdelphij /* The entry was found, so get its associated 141170808Sdelphij * tmpfs_node. */ 142170808Sdelphij tnode = de->td_node; 143170808Sdelphij 144170808Sdelphij /* If we are not at the last path component and 145170808Sdelphij * found a non-directory or non-link entry (which 146170808Sdelphij * may itself be pointing to a directory), raise 147170808Sdelphij * an error. */ 148170808Sdelphij if ((tnode->tn_type != VDIR && 149170808Sdelphij tnode->tn_type != VLNK) && 150170808Sdelphij !(cnp->cn_flags & ISLASTCN)) { 151170808Sdelphij error = ENOTDIR; 152170808Sdelphij goto out; 153170808Sdelphij } 154170808Sdelphij 155170808Sdelphij /* If we are deleting or renaming the entry, keep 156170808Sdelphij * track of its tmpfs_dirent so that it can be 157170808Sdelphij * easily deleted later. */ 158170808Sdelphij if ((cnp->cn_flags & ISLASTCN) && 159170808Sdelphij (cnp->cn_nameiop == DELETE || 160170808Sdelphij cnp->cn_nameiop == RENAME)) { 161170808Sdelphij error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, 162170808Sdelphij cnp->cn_thread); 163170808Sdelphij if (error != 0) 164170808Sdelphij goto out; 165171070Sdelphij 166170808Sdelphij /* Allocate a new vnode on the matching entry. */ 167171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 168191990Sattilio cnp->cn_lkflags, vpp); 169170808Sdelphij if (error != 0) 170170808Sdelphij goto out; 171170808Sdelphij 172170808Sdelphij if ((dnode->tn_mode & S_ISTXT) && 173170808Sdelphij VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && 174170808Sdelphij VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { 175170808Sdelphij error = EPERM; 176170808Sdelphij vput(*vpp); 177170808Sdelphij *vpp = NULL; 178170808Sdelphij goto out; 179171070Sdelphij } 180170808Sdelphij cnp->cn_flags |= SAVENAME; 181171799Sdelphij } else { 182171799Sdelphij error = tmpfs_alloc_vp(dvp->v_mount, tnode, 183191990Sattilio cnp->cn_lkflags, vpp); 184170808Sdelphij } 185170808Sdelphij } 186170808Sdelphij } 187170808Sdelphij 188170808Sdelphij /* Store the result of this lookup in the cache. Avoid this if the 189170808Sdelphij * request was for creation, as it does not improve timings on 190170808Sdelphij * emprical tests. */ 191170808Sdelphij if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) 192170808Sdelphij cache_enter(dvp, *vpp, cnp); 193170808Sdelphij 194170808Sdelphijout: 195170808Sdelphij /* If there were no errors, *vpp cannot be null and it must be 196170808Sdelphij * locked. */ 197176559Sattilio MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); 198170808Sdelphij 199170808Sdelphij return error; 200170808Sdelphij} 201170808Sdelphij 202170808Sdelphij/* --------------------------------------------------------------------- */ 203170808Sdelphij 204171069Sdelphijstatic int 205170808Sdelphijtmpfs_create(struct vop_create_args *v) 206170808Sdelphij{ 207170808Sdelphij struct vnode *dvp = v->a_dvp; 208170808Sdelphij struct vnode **vpp = v->a_vpp; 209170808Sdelphij struct componentname *cnp = v->a_cnp; 210170808Sdelphij struct vattr *vap = v->a_vap; 211170808Sdelphij 212170808Sdelphij MPASS(vap->va_type == VREG || vap->va_type == VSOCK); 213170808Sdelphij 214170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 215170808Sdelphij} 216170808Sdelphij/* --------------------------------------------------------------------- */ 217170808Sdelphij 218171069Sdelphijstatic int 219170808Sdelphijtmpfs_mknod(struct vop_mknod_args *v) 220170808Sdelphij{ 221170808Sdelphij struct vnode *dvp = v->a_dvp; 222170808Sdelphij struct vnode **vpp = v->a_vpp; 223170808Sdelphij struct componentname *cnp = v->a_cnp; 224170808Sdelphij struct vattr *vap = v->a_vap; 225170808Sdelphij 226170808Sdelphij if (vap->va_type != VBLK && vap->va_type != VCHR && 227170808Sdelphij vap->va_type != VFIFO) 228170808Sdelphij return EINVAL; 229170808Sdelphij 230170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 231170808Sdelphij} 232170808Sdelphij 233170808Sdelphij/* --------------------------------------------------------------------- */ 234170808Sdelphij 235171069Sdelphijstatic int 236170808Sdelphijtmpfs_open(struct vop_open_args *v) 237170808Sdelphij{ 238170808Sdelphij struct vnode *vp = v->a_vp; 239170808Sdelphij int mode = v->a_mode; 240170808Sdelphij 241170808Sdelphij int error; 242170808Sdelphij struct tmpfs_node *node; 243170808Sdelphij 244176559Sattilio MPASS(VOP_ISLOCKED(vp)); 245170808Sdelphij 246170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 247171070Sdelphij 248170808Sdelphij /* The file is still active but all its names have been removed 249170808Sdelphij * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as 250170808Sdelphij * it is about to die. */ 251170808Sdelphij if (node->tn_links < 1) 252170808Sdelphij return (ENOENT); 253170808Sdelphij 254170808Sdelphij /* If the file is marked append-only, deny write requests. */ 255170808Sdelphij if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) 256170808Sdelphij error = EPERM; 257170808Sdelphij else { 258170808Sdelphij error = 0; 259171070Sdelphij vnode_create_vobject(vp, node->tn_size, v->a_td); 260170808Sdelphij } 261170808Sdelphij 262176559Sattilio MPASS(VOP_ISLOCKED(vp)); 263170808Sdelphij return error; 264170808Sdelphij} 265170808Sdelphij 266170808Sdelphij/* --------------------------------------------------------------------- */ 267170808Sdelphij 268171069Sdelphijstatic int 269170808Sdelphijtmpfs_close(struct vop_close_args *v) 270170808Sdelphij{ 271170808Sdelphij struct vnode *vp = v->a_vp; 272170808Sdelphij 273176559Sattilio MPASS(VOP_ISLOCKED(vp)); 274170808Sdelphij 275218949Salc /* Update node times. */ 276218949Salc tmpfs_update(vp); 277170808Sdelphij 278218949Salc return (0); 279170808Sdelphij} 280170808Sdelphij 281170808Sdelphij/* --------------------------------------------------------------------- */ 282170808Sdelphij 283170808Sdelphijint 284170808Sdelphijtmpfs_access(struct vop_access_args *v) 285170808Sdelphij{ 286170808Sdelphij struct vnode *vp = v->a_vp; 287184413Strasz accmode_t accmode = v->a_accmode; 288170808Sdelphij struct ucred *cred = v->a_cred; 289170808Sdelphij 290170808Sdelphij int error; 291170808Sdelphij struct tmpfs_node *node; 292170808Sdelphij 293176559Sattilio MPASS(VOP_ISLOCKED(vp)); 294170808Sdelphij 295170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 296170808Sdelphij 297170808Sdelphij switch (vp->v_type) { 298170808Sdelphij case VDIR: 299170808Sdelphij /* FALLTHROUGH */ 300170808Sdelphij case VLNK: 301170808Sdelphij /* FALLTHROUGH */ 302170808Sdelphij case VREG: 303184413Strasz if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { 304170808Sdelphij error = EROFS; 305170808Sdelphij goto out; 306170808Sdelphij } 307170808Sdelphij break; 308170808Sdelphij 309170808Sdelphij case VBLK: 310170808Sdelphij /* FALLTHROUGH */ 311170808Sdelphij case VCHR: 312170808Sdelphij /* FALLTHROUGH */ 313170808Sdelphij case VSOCK: 314170808Sdelphij /* FALLTHROUGH */ 315170808Sdelphij case VFIFO: 316170808Sdelphij break; 317170808Sdelphij 318170808Sdelphij default: 319170808Sdelphij error = EINVAL; 320170808Sdelphij goto out; 321170808Sdelphij } 322170808Sdelphij 323184413Strasz if (accmode & VWRITE && node->tn_flags & IMMUTABLE) { 324170808Sdelphij error = EPERM; 325170808Sdelphij goto out; 326170808Sdelphij } 327170808Sdelphij 328170808Sdelphij error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, 329184413Strasz node->tn_gid, accmode, cred, NULL); 330170808Sdelphij 331170808Sdelphijout: 332176559Sattilio MPASS(VOP_ISLOCKED(vp)); 333170808Sdelphij 334170808Sdelphij return error; 335170808Sdelphij} 336170808Sdelphij 337170808Sdelphij/* --------------------------------------------------------------------- */ 338170808Sdelphij 339170808Sdelphijint 340170808Sdelphijtmpfs_getattr(struct vop_getattr_args *v) 341170808Sdelphij{ 342170808Sdelphij struct vnode *vp = v->a_vp; 343170808Sdelphij struct vattr *vap = v->a_vap; 344170808Sdelphij 345170808Sdelphij struct tmpfs_node *node; 346170808Sdelphij 347170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 348170808Sdelphij 349170808Sdelphij tmpfs_update(vp); 350170808Sdelphij 351170808Sdelphij vap->va_type = vp->v_type; 352170808Sdelphij vap->va_mode = node->tn_mode; 353170808Sdelphij vap->va_nlink = node->tn_links; 354170808Sdelphij vap->va_uid = node->tn_uid; 355170808Sdelphij vap->va_gid = node->tn_gid; 356170808Sdelphij vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 357170808Sdelphij vap->va_fileid = node->tn_id; 358170808Sdelphij vap->va_size = node->tn_size; 359170808Sdelphij vap->va_blocksize = PAGE_SIZE; 360170808Sdelphij vap->va_atime = node->tn_atime; 361170808Sdelphij vap->va_mtime = node->tn_mtime; 362170808Sdelphij vap->va_ctime = node->tn_ctime; 363170808Sdelphij vap->va_birthtime = node->tn_birthtime; 364170808Sdelphij vap->va_gen = node->tn_gen; 365170808Sdelphij vap->va_flags = node->tn_flags; 366170808Sdelphij vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? 367183214Skib node->tn_rdev : NODEV; 368170808Sdelphij vap->va_bytes = round_page(node->tn_size); 369183212Skib vap->va_filerev = 0; 370170808Sdelphij 371170808Sdelphij return 0; 372170808Sdelphij} 373170808Sdelphij 374170808Sdelphij/* --------------------------------------------------------------------- */ 375170808Sdelphij 376170808Sdelphij/* XXX Should this operation be atomic? I think it should, but code in 377170808Sdelphij * XXX other places (e.g., ufs) doesn't seem to be... */ 378170808Sdelphijint 379170808Sdelphijtmpfs_setattr(struct vop_setattr_args *v) 380170808Sdelphij{ 381170808Sdelphij struct vnode *vp = v->a_vp; 382170808Sdelphij struct vattr *vap = v->a_vap; 383170808Sdelphij struct ucred *cred = v->a_cred; 384182371Sattilio struct thread *td = curthread; 385170808Sdelphij 386170808Sdelphij int error; 387170808Sdelphij 388176559Sattilio MPASS(VOP_ISLOCKED(vp)); 389170808Sdelphij 390170808Sdelphij error = 0; 391170808Sdelphij 392170808Sdelphij /* Abort if any unsettable attribute is given. */ 393170808Sdelphij if (vap->va_type != VNON || 394170808Sdelphij vap->va_nlink != VNOVAL || 395170808Sdelphij vap->va_fsid != VNOVAL || 396170808Sdelphij vap->va_fileid != VNOVAL || 397170808Sdelphij vap->va_blocksize != VNOVAL || 398170808Sdelphij vap->va_gen != VNOVAL || 399170808Sdelphij vap->va_rdev != VNOVAL || 400170808Sdelphij vap->va_bytes != VNOVAL) 401170808Sdelphij error = EINVAL; 402170808Sdelphij 403170808Sdelphij if (error == 0 && (vap->va_flags != VNOVAL)) 404182371Sattilio error = tmpfs_chflags(vp, vap->va_flags, cred, td); 405170808Sdelphij 406170808Sdelphij if (error == 0 && (vap->va_size != VNOVAL)) 407182371Sattilio error = tmpfs_chsize(vp, vap->va_size, cred, td); 408170808Sdelphij 409170808Sdelphij if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) 410182371Sattilio error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); 411170808Sdelphij 412170808Sdelphij if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) 413182371Sattilio error = tmpfs_chmod(vp, vap->va_mode, cred, td); 414170808Sdelphij 415170808Sdelphij if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && 416170808Sdelphij vap->va_atime.tv_nsec != VNOVAL) || 417170808Sdelphij (vap->va_mtime.tv_sec != VNOVAL && 418170808Sdelphij vap->va_mtime.tv_nsec != VNOVAL) || 419170808Sdelphij (vap->va_birthtime.tv_sec != VNOVAL && 420170808Sdelphij vap->va_birthtime.tv_nsec != VNOVAL))) 421171070Sdelphij error = tmpfs_chtimes(vp, &vap->va_atime, &vap->va_mtime, 422182371Sattilio &vap->va_birthtime, vap->va_vaflags, cred, td); 423170808Sdelphij 424170808Sdelphij /* Update the node times. We give preference to the error codes 425170808Sdelphij * generated by this function rather than the ones that may arise 426170808Sdelphij * from tmpfs_update. */ 427170808Sdelphij tmpfs_update(vp); 428170808Sdelphij 429176559Sattilio MPASS(VOP_ISLOCKED(vp)); 430170808Sdelphij 431170808Sdelphij return error; 432170808Sdelphij} 433170808Sdelphij 434170808Sdelphij/* --------------------------------------------------------------------- */ 435197850Sdelphijstatic int 436197850Sdelphijtmpfs_nocacheread(vm_object_t tobj, vm_pindex_t idx, 437197850Sdelphij vm_offset_t offset, size_t tlen, struct uio *uio) 438197850Sdelphij{ 439197850Sdelphij vm_page_t m; 440230120Salc int error, rv; 441171489Sdelphij 442197850Sdelphij VM_OBJECT_LOCK(tobj); 443197850Sdelphij m = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 444229363Salc VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 445197850Sdelphij if (m->valid != VM_PAGE_BITS_ALL) { 446197850Sdelphij if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 447230120Salc rv = vm_pager_get_pages(tobj, &m, 1, 0); 448230120Salc if (rv != VM_PAGER_OK) { 449230120Salc vm_page_lock(m); 450230120Salc vm_page_free(m); 451230120Salc vm_page_unlock(m); 452230120Salc VM_OBJECT_UNLOCK(tobj); 453230120Salc return (EIO); 454197850Sdelphij } 455197850Sdelphij } else 456197850Sdelphij vm_page_zero_invalid(m, TRUE); 457197850Sdelphij } 458197850Sdelphij VM_OBJECT_UNLOCK(tobj); 459197850Sdelphij error = uiomove_fromphys(&m, offset, tlen, uio); 460197850Sdelphij VM_OBJECT_LOCK(tobj); 461207573Salc vm_page_lock(m); 462197850Sdelphij vm_page_unwire(m, TRUE); 463207573Salc vm_page_unlock(m); 464197850Sdelphij vm_page_wakeup(m); 465197850Sdelphij VM_OBJECT_UNLOCK(tobj); 466197850Sdelphij 467197850Sdelphij return (error); 468197850Sdelphij} 469197850Sdelphij 470197850Sdelphijstatic __inline int 471197850Sdelphijtmpfs_nocacheread_buf(vm_object_t tobj, vm_pindex_t idx, 472197850Sdelphij vm_offset_t offset, size_t tlen, void *buf) 473197850Sdelphij{ 474197850Sdelphij struct uio uio; 475197850Sdelphij struct iovec iov; 476197850Sdelphij 477197850Sdelphij uio.uio_iovcnt = 1; 478197850Sdelphij uio.uio_iov = &iov; 479197850Sdelphij iov.iov_base = buf; 480197850Sdelphij iov.iov_len = tlen; 481197850Sdelphij 482197850Sdelphij uio.uio_offset = 0; 483197850Sdelphij uio.uio_resid = tlen; 484197850Sdelphij uio.uio_rw = UIO_READ; 485197850Sdelphij uio.uio_segflg = UIO_SYSSPACE; 486197850Sdelphij uio.uio_td = curthread; 487197850Sdelphij 488197850Sdelphij return (tmpfs_nocacheread(tobj, idx, offset, tlen, &uio)); 489197850Sdelphij} 490197850Sdelphij 491170808Sdelphijstatic int 492171489Sdelphijtmpfs_mappedread(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 493170808Sdelphij{ 494197850Sdelphij struct sf_buf *sf; 495171489Sdelphij vm_pindex_t idx; 496171489Sdelphij vm_page_t m; 497188929Salc vm_offset_t offset; 498188929Salc off_t addr; 499171489Sdelphij size_t tlen; 500197850Sdelphij char *ma; 501171489Sdelphij int error; 502170808Sdelphij 503171489Sdelphij addr = uio->uio_offset; 504171489Sdelphij idx = OFF_TO_IDX(addr); 505171489Sdelphij offset = addr & PAGE_MASK; 506171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 507170808Sdelphij 508197740Sdelphij if ((vobj == NULL) || 509197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) 510171489Sdelphij goto nocache; 511170808Sdelphij 512171489Sdelphij VM_OBJECT_LOCK(vobj); 513171489Sdelphijlookupvpg: 514171489Sdelphij if (((m = vm_page_lookup(vobj, idx)) != NULL) && 515171489Sdelphij vm_page_is_valid(m, offset, tlen)) { 516207530Salc if ((m->oflags & VPO_BUSY) != 0) { 517207530Salc /* 518207530Salc * Reference the page before unlocking and sleeping so 519207530Salc * that the page daemon is less likely to reclaim it. 520207530Salc */ 521225418Skib vm_page_reference(m); 522207530Salc vm_page_sleep(m, "tmfsmr"); 523171489Sdelphij goto lookupvpg; 524207530Salc } 525171489Sdelphij vm_page_busy(m); 526171489Sdelphij VM_OBJECT_UNLOCK(vobj); 527188929Salc error = uiomove_fromphys(&m, offset, tlen, uio); 528171489Sdelphij VM_OBJECT_LOCK(vobj); 529171489Sdelphij vm_page_wakeup(m); 530171489Sdelphij VM_OBJECT_UNLOCK(vobj); 531171489Sdelphij return (error); 532197850Sdelphij } else if (m != NULL && uio->uio_segflg == UIO_NOCOPY) { 533213735Savg KASSERT(offset == 0, 534213735Savg ("unexpected offset in tmpfs_mappedread for sendfile")); 535207530Salc if ((m->oflags & VPO_BUSY) != 0) { 536207530Salc /* 537207530Salc * Reference the page before unlocking and sleeping so 538207530Salc * that the page daemon is less likely to reclaim it. 539207530Salc */ 540225418Skib vm_page_reference(m); 541207530Salc vm_page_sleep(m, "tmfsmr"); 542197850Sdelphij goto lookupvpg; 543207530Salc } 544197850Sdelphij vm_page_busy(m); 545197850Sdelphij VM_OBJECT_UNLOCK(vobj); 546197850Sdelphij sched_pin(); 547197850Sdelphij sf = sf_buf_alloc(m, SFB_CPUPRIVATE); 548197850Sdelphij ma = (char *)sf_buf_kva(sf); 549213735Savg error = tmpfs_nocacheread_buf(tobj, idx, 0, tlen, ma); 550197850Sdelphij if (error == 0) { 551213735Savg if (tlen != PAGE_SIZE) 552213735Savg bzero(ma + tlen, PAGE_SIZE - tlen); 553197850Sdelphij uio->uio_offset += tlen; 554197850Sdelphij uio->uio_resid -= tlen; 555197850Sdelphij } 556197850Sdelphij sf_buf_free(sf); 557197850Sdelphij sched_unpin(); 558197850Sdelphij VM_OBJECT_LOCK(vobj); 559212650Savg if (error == 0) 560213735Savg m->valid = VM_PAGE_BITS_ALL; 561197850Sdelphij vm_page_wakeup(m); 562197850Sdelphij VM_OBJECT_UNLOCK(vobj); 563197850Sdelphij return (error); 564171799Sdelphij } 565171489Sdelphij VM_OBJECT_UNLOCK(vobj); 566171489Sdelphijnocache: 567197850Sdelphij error = tmpfs_nocacheread(tobj, idx, offset, tlen, uio); 568171489Sdelphij 569171489Sdelphij return (error); 570170808Sdelphij} 571170808Sdelphij 572171069Sdelphijstatic int 573170808Sdelphijtmpfs_read(struct vop_read_args *v) 574170808Sdelphij{ 575170808Sdelphij struct vnode *vp = v->a_vp; 576170808Sdelphij struct uio *uio = v->a_uio; 577170808Sdelphij 578170808Sdelphij struct tmpfs_node *node; 579170808Sdelphij vm_object_t uobj; 580171489Sdelphij size_t len; 581171489Sdelphij int resid; 582170808Sdelphij 583174265Swkoszek int error = 0; 584170808Sdelphij 585170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 586170808Sdelphij 587170808Sdelphij if (vp->v_type != VREG) { 588170808Sdelphij error = EISDIR; 589170808Sdelphij goto out; 590170808Sdelphij } 591170808Sdelphij 592170808Sdelphij if (uio->uio_offset < 0) { 593170808Sdelphij error = EINVAL; 594170808Sdelphij goto out; 595170808Sdelphij } 596170808Sdelphij 597170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 598170808Sdelphij 599170808Sdelphij uobj = node->tn_reg.tn_aobj; 600171489Sdelphij while ((resid = uio->uio_resid) > 0) { 601171489Sdelphij error = 0; 602171489Sdelphij if (node->tn_size <= uio->uio_offset) 603171489Sdelphij break; 604171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 605171489Sdelphij if (len == 0) 606171489Sdelphij break; 607171489Sdelphij error = tmpfs_mappedread(vp->v_object, uobj, len, uio); 608171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 609171489Sdelphij break; 610171489Sdelphij } 611170808Sdelphij 612170808Sdelphijout: 613170808Sdelphij 614170808Sdelphij return error; 615170808Sdelphij} 616170808Sdelphij 617170808Sdelphij/* --------------------------------------------------------------------- */ 618170808Sdelphij 619171069Sdelphijstatic int 620171489Sdelphijtmpfs_mappedwrite(vm_object_t vobj, vm_object_t tobj, size_t len, struct uio *uio) 621171489Sdelphij{ 622171489Sdelphij vm_pindex_t idx; 623171489Sdelphij vm_page_t vpg, tpg; 624188929Salc vm_offset_t offset; 625188929Salc off_t addr; 626171489Sdelphij size_t tlen; 627230120Salc int error, rv; 628171489Sdelphij 629174265Swkoszek error = 0; 630174265Swkoszek 631171489Sdelphij addr = uio->uio_offset; 632171489Sdelphij idx = OFF_TO_IDX(addr); 633171489Sdelphij offset = addr & PAGE_MASK; 634171489Sdelphij tlen = MIN(PAGE_SIZE - offset, len); 635171489Sdelphij 636197740Sdelphij if ((vobj == NULL) || 637197740Sdelphij (vobj->resident_page_count == 0 && vobj->cache == NULL)) { 638171489Sdelphij vpg = NULL; 639171489Sdelphij goto nocache; 640171489Sdelphij } 641171489Sdelphij 642171489Sdelphij VM_OBJECT_LOCK(vobj); 643171489Sdelphijlookupvpg: 644171489Sdelphij if (((vpg = vm_page_lookup(vobj, idx)) != NULL) && 645171489Sdelphij vm_page_is_valid(vpg, offset, tlen)) { 646207530Salc if ((vpg->oflags & VPO_BUSY) != 0) { 647207530Salc /* 648207530Salc * Reference the page before unlocking and sleeping so 649207530Salc * that the page daemon is less likely to reclaim it. 650207530Salc */ 651225418Skib vm_page_reference(vpg); 652207530Salc vm_page_sleep(vpg, "tmfsmw"); 653171489Sdelphij goto lookupvpg; 654207530Salc } 655171489Sdelphij vm_page_busy(vpg); 656171489Sdelphij vm_page_undirty(vpg); 657171489Sdelphij VM_OBJECT_UNLOCK(vobj); 658188929Salc error = uiomove_fromphys(&vpg, offset, tlen, uio); 659171489Sdelphij } else { 660197740Sdelphij if (__predict_false(vobj->cache != NULL)) 661197740Sdelphij vm_page_cache_free(vobj, idx, idx + 1); 662171489Sdelphij VM_OBJECT_UNLOCK(vobj); 663171489Sdelphij vpg = NULL; 664171489Sdelphij } 665171489Sdelphijnocache: 666171489Sdelphij VM_OBJECT_LOCK(tobj); 667171489Sdelphij tpg = vm_page_grab(tobj, idx, VM_ALLOC_WIRED | 668229363Salc VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 669171489Sdelphij if (tpg->valid != VM_PAGE_BITS_ALL) { 670194124Salc if (vm_pager_has_page(tobj, idx, NULL, NULL)) { 671230120Salc rv = vm_pager_get_pages(tobj, &tpg, 1, 0); 672230120Salc if (rv != VM_PAGER_OK) { 673230120Salc vm_page_lock(tpg); 674230120Salc vm_page_free(tpg); 675230120Salc vm_page_unlock(tpg); 676230120Salc error = EIO; 677171489Sdelphij goto out; 678171489Sdelphij } 679171489Sdelphij } else 680171489Sdelphij vm_page_zero_invalid(tpg, TRUE); 681171489Sdelphij } 682171489Sdelphij VM_OBJECT_UNLOCK(tobj); 683188929Salc if (vpg == NULL) 684188929Salc error = uiomove_fromphys(&tpg, offset, tlen, uio); 685188929Salc else { 686171489Sdelphij KASSERT(vpg->valid == VM_PAGE_BITS_ALL, ("parts of vpg invalid")); 687171489Sdelphij pmap_copy_page(vpg, tpg); 688171489Sdelphij } 689171489Sdelphij VM_OBJECT_LOCK(tobj); 690171489Sdelphij if (error == 0) { 691192917Salc KASSERT(tpg->valid == VM_PAGE_BITS_ALL, 692192917Salc ("parts of tpg invalid")); 693171489Sdelphij vm_page_dirty(tpg); 694171489Sdelphij } 695209226Salc vm_page_lock(tpg); 696188921Salc vm_page_unwire(tpg, TRUE); 697207573Salc vm_page_unlock(tpg); 698171489Sdelphij vm_page_wakeup(tpg); 699230120Salcout: 700230120Salc VM_OBJECT_UNLOCK(tobj); 701230120Salc if (vpg != NULL) { 702230120Salc VM_OBJECT_LOCK(vobj); 703171489Sdelphij vm_page_wakeup(vpg); 704171489Sdelphij VM_OBJECT_UNLOCK(vobj); 705230120Salc } 706171489Sdelphij 707171489Sdelphij return (error); 708171489Sdelphij} 709171489Sdelphij 710171489Sdelphijstatic int 711170808Sdelphijtmpfs_write(struct vop_write_args *v) 712170808Sdelphij{ 713170808Sdelphij struct vnode *vp = v->a_vp; 714170808Sdelphij struct uio *uio = v->a_uio; 715170808Sdelphij int ioflag = v->a_ioflag; 716170808Sdelphij 717170808Sdelphij boolean_t extended; 718171489Sdelphij int error = 0; 719170808Sdelphij off_t oldsize; 720170808Sdelphij struct tmpfs_node *node; 721170808Sdelphij vm_object_t uobj; 722171489Sdelphij size_t len; 723171489Sdelphij int resid; 724170808Sdelphij 725170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 726170808Sdelphij oldsize = node->tn_size; 727170808Sdelphij 728170808Sdelphij if (uio->uio_offset < 0 || vp->v_type != VREG) { 729170808Sdelphij error = EINVAL; 730170808Sdelphij goto out; 731170808Sdelphij } 732170808Sdelphij 733170808Sdelphij if (uio->uio_resid == 0) { 734170808Sdelphij error = 0; 735170808Sdelphij goto out; 736170808Sdelphij } 737170808Sdelphij 738170808Sdelphij if (ioflag & IO_APPEND) 739170808Sdelphij uio->uio_offset = node->tn_size; 740171070Sdelphij 741171070Sdelphij if (uio->uio_offset + uio->uio_resid > 742170808Sdelphij VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) 743170808Sdelphij return (EFBIG); 744170808Sdelphij 745207719Strasz if (vn_rlimit_fsize(vp, uio, uio->uio_td)) 746207662Strasz return (EFBIG); 747170808Sdelphij 748170808Sdelphij extended = uio->uio_offset + uio->uio_resid > node->tn_size; 749170808Sdelphij if (extended) { 750230180Salc error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid, 751230180Salc FALSE); 752170808Sdelphij if (error != 0) 753170808Sdelphij goto out; 754170808Sdelphij } 755170808Sdelphij 756170808Sdelphij uobj = node->tn_reg.tn_aobj; 757171489Sdelphij while ((resid = uio->uio_resid) > 0) { 758171489Sdelphij if (node->tn_size <= uio->uio_offset) 759171489Sdelphij break; 760171489Sdelphij len = MIN(node->tn_size - uio->uio_offset, resid); 761171489Sdelphij if (len == 0) 762171489Sdelphij break; 763171489Sdelphij error = tmpfs_mappedwrite(vp->v_object, uobj, len, uio); 764171489Sdelphij if ((error != 0) || (resid == uio->uio_resid)) 765171489Sdelphij break; 766171489Sdelphij } 767170808Sdelphij 768170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | 769170808Sdelphij (extended ? TMPFS_NODE_CHANGED : 0); 770170808Sdelphij 771170808Sdelphij if (node->tn_mode & (S_ISUID | S_ISGID)) { 772170808Sdelphij if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID, 0)) 773170808Sdelphij node->tn_mode &= ~(S_ISUID | S_ISGID); 774170808Sdelphij } 775170808Sdelphij 776170808Sdelphij if (error != 0) 777230180Salc (void)tmpfs_reg_resize(vp, oldsize, TRUE); 778170808Sdelphij 779170808Sdelphijout: 780170808Sdelphij MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); 781170808Sdelphij MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); 782170808Sdelphij 783170808Sdelphij return error; 784170808Sdelphij} 785170808Sdelphij 786170808Sdelphij/* --------------------------------------------------------------------- */ 787170808Sdelphij 788171069Sdelphijstatic int 789170808Sdelphijtmpfs_fsync(struct vop_fsync_args *v) 790170808Sdelphij{ 791170808Sdelphij struct vnode *vp = v->a_vp; 792170808Sdelphij 793176559Sattilio MPASS(VOP_ISLOCKED(vp)); 794170808Sdelphij 795170808Sdelphij tmpfs_update(vp); 796170808Sdelphij 797170808Sdelphij return 0; 798170808Sdelphij} 799170808Sdelphij 800170808Sdelphij/* --------------------------------------------------------------------- */ 801170808Sdelphij 802171069Sdelphijstatic int 803170808Sdelphijtmpfs_remove(struct vop_remove_args *v) 804170808Sdelphij{ 805170808Sdelphij struct vnode *dvp = v->a_dvp; 806170808Sdelphij struct vnode *vp = v->a_vp; 807170808Sdelphij 808170808Sdelphij int error; 809170808Sdelphij struct tmpfs_dirent *de; 810170808Sdelphij struct tmpfs_mount *tmp; 811170808Sdelphij struct tmpfs_node *dnode; 812170808Sdelphij struct tmpfs_node *node; 813170808Sdelphij 814176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 815176559Sattilio MPASS(VOP_ISLOCKED(vp)); 816170808Sdelphij 817170808Sdelphij if (vp->v_type == VDIR) { 818170808Sdelphij error = EISDIR; 819170808Sdelphij goto out; 820170808Sdelphij } 821170808Sdelphij 822170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 823170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 824170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 825188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 826170808Sdelphij MPASS(de != NULL); 827170808Sdelphij 828170808Sdelphij /* Files marked as immutable or append-only cannot be deleted. */ 829170808Sdelphij if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || 830170808Sdelphij (dnode->tn_flags & APPEND)) { 831170808Sdelphij error = EPERM; 832170808Sdelphij goto out; 833170808Sdelphij } 834170808Sdelphij 835170808Sdelphij /* Remove the entry from the directory; as it is a file, we do not 836170808Sdelphij * have to change the number of hard links of the directory. */ 837170808Sdelphij tmpfs_dir_detach(dvp, de); 838211598Sed if (v->a_cnp->cn_flags & DOWHITEOUT) 839211598Sed tmpfs_dir_whiteout_add(dvp, v->a_cnp); 840170808Sdelphij 841170808Sdelphij /* Free the directory entry we just deleted. Note that the node 842170808Sdelphij * referred by it will not be removed until the vnode is really 843170808Sdelphij * reclaimed. */ 844170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 845170808Sdelphij 846218949Salc node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED; 847170808Sdelphij error = 0; 848170808Sdelphij 849170808Sdelphijout: 850170808Sdelphij 851170808Sdelphij return error; 852170808Sdelphij} 853170808Sdelphij 854170808Sdelphij/* --------------------------------------------------------------------- */ 855170808Sdelphij 856171069Sdelphijstatic int 857170808Sdelphijtmpfs_link(struct vop_link_args *v) 858170808Sdelphij{ 859170808Sdelphij struct vnode *dvp = v->a_tdvp; 860170808Sdelphij struct vnode *vp = v->a_vp; 861170808Sdelphij struct componentname *cnp = v->a_cnp; 862170808Sdelphij 863170808Sdelphij int error; 864170808Sdelphij struct tmpfs_dirent *de; 865170808Sdelphij struct tmpfs_node *node; 866170808Sdelphij 867176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 868170808Sdelphij MPASS(cnp->cn_flags & HASBUF); 869170808Sdelphij MPASS(dvp != vp); /* XXX When can this be false? */ 870170808Sdelphij 871170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 872170808Sdelphij 873170808Sdelphij /* XXX: Why aren't the following two tests done by the caller? */ 874170808Sdelphij 875170808Sdelphij /* Hard links of directories are forbidden. */ 876170808Sdelphij if (vp->v_type == VDIR) { 877170808Sdelphij error = EPERM; 878170808Sdelphij goto out; 879170808Sdelphij } 880170808Sdelphij 881170808Sdelphij /* Cannot create cross-device links. */ 882170808Sdelphij if (dvp->v_mount != vp->v_mount) { 883170808Sdelphij error = EXDEV; 884170808Sdelphij goto out; 885170808Sdelphij } 886170808Sdelphij 887170808Sdelphij /* Ensure that we do not overflow the maximum number of links imposed 888170808Sdelphij * by the system. */ 889170808Sdelphij MPASS(node->tn_links <= LINK_MAX); 890170808Sdelphij if (node->tn_links == LINK_MAX) { 891170808Sdelphij error = EMLINK; 892170808Sdelphij goto out; 893170808Sdelphij } 894170808Sdelphij 895170808Sdelphij /* We cannot create links of files marked immutable or append-only. */ 896170808Sdelphij if (node->tn_flags & (IMMUTABLE | APPEND)) { 897170808Sdelphij error = EPERM; 898170808Sdelphij goto out; 899170808Sdelphij } 900170808Sdelphij 901170808Sdelphij /* Allocate a new directory entry to represent the node. */ 902170808Sdelphij error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, 903170808Sdelphij cnp->cn_nameptr, cnp->cn_namelen, &de); 904170808Sdelphij if (error != 0) 905170808Sdelphij goto out; 906170808Sdelphij 907170808Sdelphij /* Insert the new directory entry into the appropriate directory. */ 908211598Sed if (cnp->cn_flags & ISWHITEOUT) 909211598Sed tmpfs_dir_whiteout_remove(dvp, cnp); 910170808Sdelphij tmpfs_dir_attach(dvp, de); 911170808Sdelphij 912170808Sdelphij /* vp link count has changed, so update node times. */ 913170808Sdelphij node->tn_status |= TMPFS_NODE_CHANGED; 914170808Sdelphij tmpfs_update(vp); 915170808Sdelphij 916170808Sdelphij error = 0; 917171070Sdelphij 918170808Sdelphijout: 919170808Sdelphij return error; 920170808Sdelphij} 921170808Sdelphij 922170808Sdelphij/* --------------------------------------------------------------------- */ 923170808Sdelphij 924171069Sdelphijstatic int 925170808Sdelphijtmpfs_rename(struct vop_rename_args *v) 926170808Sdelphij{ 927170808Sdelphij struct vnode *fdvp = v->a_fdvp; 928170808Sdelphij struct vnode *fvp = v->a_fvp; 929170808Sdelphij struct componentname *fcnp = v->a_fcnp; 930170808Sdelphij struct vnode *tdvp = v->a_tdvp; 931170808Sdelphij struct vnode *tvp = v->a_tvp; 932170808Sdelphij struct componentname *tcnp = v->a_tcnp; 933170808Sdelphij 934170808Sdelphij char *newname; 935170808Sdelphij int error; 936170808Sdelphij struct tmpfs_dirent *de; 937197953Sdelphij struct tmpfs_mount *tmp; 938170808Sdelphij struct tmpfs_node *fdnode; 939170808Sdelphij struct tmpfs_node *fnode; 940171799Sdelphij struct tmpfs_node *tnode; 941170808Sdelphij struct tmpfs_node *tdnode; 942170808Sdelphij 943176559Sattilio MPASS(VOP_ISLOCKED(tdvp)); 944176559Sattilio MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); 945170808Sdelphij MPASS(fcnp->cn_flags & HASBUF); 946170808Sdelphij MPASS(tcnp->cn_flags & HASBUF); 947170808Sdelphij 948171799Sdelphij tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); 949170808Sdelphij 950170808Sdelphij /* Disallow cross-device renames. 951170808Sdelphij * XXX Why isn't this done by the caller? */ 952170808Sdelphij if (fvp->v_mount != tdvp->v_mount || 953170808Sdelphij (tvp != NULL && fvp->v_mount != tvp->v_mount)) { 954170808Sdelphij error = EXDEV; 955170808Sdelphij goto out; 956170808Sdelphij } 957170808Sdelphij 958197953Sdelphij tmp = VFS_TO_TMPFS(tdvp->v_mount); 959170808Sdelphij tdnode = VP_TO_TMPFS_DIR(tdvp); 960170808Sdelphij 961170808Sdelphij /* If source and target are the same file, there is nothing to do. */ 962170808Sdelphij if (fvp == tvp) { 963170808Sdelphij error = 0; 964170808Sdelphij goto out; 965170808Sdelphij } 966170808Sdelphij 967173725Sdelphij /* If we need to move the directory between entries, lock the 968173725Sdelphij * source so that we can safely operate on it. */ 969227822Sivoras if (fdvp != tdvp && fdvp != tvp) 970227822Sivoras vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 971173725Sdelphij fdnode = VP_TO_TMPFS_DIR(fdvp); 972173725Sdelphij fnode = VP_TO_TMPFS_NODE(fvp); 973188318Skib de = tmpfs_dir_lookup(fdnode, fnode, fcnp); 974173725Sdelphij 975212305Sivoras /* Entry can disappear before we lock fdvp, 976212305Sivoras * also avoid manipulating '.' and '..' entries. */ 977170808Sdelphij if (de == NULL) { 978212305Sivoras if ((fcnp->cn_flags & ISDOTDOT) != 0 || 979212305Sivoras (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')) 980212305Sivoras error = EINVAL; 981212305Sivoras else 982212305Sivoras error = ENOENT; 983173725Sdelphij goto out_locked; 984170808Sdelphij } 985170808Sdelphij MPASS(de->td_node == fnode); 986170808Sdelphij 987171070Sdelphij /* If re-naming a directory to another preexisting directory 988170808Sdelphij * ensure that the target directory is empty so that its 989171070Sdelphij * removal causes no side effects. 990170808Sdelphij * Kern_rename gurantees the destination to be a directory 991170808Sdelphij * if the source is one. */ 992170808Sdelphij if (tvp != NULL) { 993171799Sdelphij MPASS(tnode != NULL); 994171070Sdelphij 995170808Sdelphij if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 996170808Sdelphij (tdnode->tn_flags & (APPEND | IMMUTABLE))) { 997170808Sdelphij error = EPERM; 998173725Sdelphij goto out_locked; 999170808Sdelphij } 1000170808Sdelphij 1001171799Sdelphij if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { 1002171799Sdelphij if (tnode->tn_size > 0) { 1003171799Sdelphij error = ENOTEMPTY; 1004173725Sdelphij goto out_locked; 1005171799Sdelphij } 1006171799Sdelphij } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { 1007171799Sdelphij error = ENOTDIR; 1008173725Sdelphij goto out_locked; 1009171799Sdelphij } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { 1010171799Sdelphij error = EISDIR; 1011173725Sdelphij goto out_locked; 1012171799Sdelphij } else { 1013171799Sdelphij MPASS(fnode->tn_type != VDIR && 1014171799Sdelphij tnode->tn_type != VDIR); 1015170808Sdelphij } 1016170808Sdelphij } 1017170808Sdelphij 1018170808Sdelphij if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) 1019170808Sdelphij || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { 1020170808Sdelphij error = EPERM; 1021170808Sdelphij goto out_locked; 1022170808Sdelphij } 1023170808Sdelphij 1024170808Sdelphij /* Ensure that we have enough memory to hold the new name, if it 1025170808Sdelphij * has to be changed. */ 1026170808Sdelphij if (fcnp->cn_namelen != tcnp->cn_namelen || 1027183299Sobrien bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { 1028171087Sdelphij newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); 1029170808Sdelphij } else 1030170808Sdelphij newname = NULL; 1031170808Sdelphij 1032170808Sdelphij /* If the node is being moved to another directory, we have to do 1033170808Sdelphij * the move. */ 1034170808Sdelphij if (fdnode != tdnode) { 1035170808Sdelphij /* In case we are moving a directory, we have to adjust its 1036170808Sdelphij * parent to point to the new parent. */ 1037170808Sdelphij if (de->td_node->tn_type == VDIR) { 1038170808Sdelphij struct tmpfs_node *n; 1039170808Sdelphij 1040170808Sdelphij /* Ensure the target directory is not a child of the 1041170808Sdelphij * directory being moved. Otherwise, we'd end up 1042170808Sdelphij * with stale nodes. */ 1043170808Sdelphij n = tdnode; 1044197953Sdelphij /* TMPFS_LOCK garanties that no nodes are freed while 1045197953Sdelphij * traversing the list. Nodes can only be marked as 1046197953Sdelphij * removed: tn_parent == NULL. */ 1047197953Sdelphij TMPFS_LOCK(tmp); 1048197953Sdelphij TMPFS_NODE_LOCK(n); 1049170808Sdelphij while (n != n->tn_dir.tn_parent) { 1050197953Sdelphij struct tmpfs_node *parent; 1051197953Sdelphij 1052170808Sdelphij if (n == fnode) { 1053197953Sdelphij TMPFS_NODE_UNLOCK(n); 1054197953Sdelphij TMPFS_UNLOCK(tmp); 1055170808Sdelphij error = EINVAL; 1056170808Sdelphij if (newname != NULL) 1057171087Sdelphij free(newname, M_TMPFSNAME); 1058170808Sdelphij goto out_locked; 1059170808Sdelphij } 1060197953Sdelphij parent = n->tn_dir.tn_parent; 1061197953Sdelphij TMPFS_NODE_UNLOCK(n); 1062197953Sdelphij if (parent == NULL) { 1063197953Sdelphij n = NULL; 1064197953Sdelphij break; 1065197953Sdelphij } 1066197953Sdelphij TMPFS_NODE_LOCK(parent); 1067197953Sdelphij if (parent->tn_dir.tn_parent == NULL) { 1068197953Sdelphij TMPFS_NODE_UNLOCK(parent); 1069197953Sdelphij n = NULL; 1070197953Sdelphij break; 1071197953Sdelphij } 1072197953Sdelphij n = parent; 1073170808Sdelphij } 1074197953Sdelphij TMPFS_UNLOCK(tmp); 1075197953Sdelphij if (n == NULL) { 1076197953Sdelphij error = EINVAL; 1077197953Sdelphij if (newname != NULL) 1078197953Sdelphij free(newname, M_TMPFSNAME); 1079197953Sdelphij goto out_locked; 1080197953Sdelphij } 1081197953Sdelphij TMPFS_NODE_UNLOCK(n); 1082170808Sdelphij 1083170808Sdelphij /* Adjust the parent pointer. */ 1084170808Sdelphij TMPFS_VALIDATE_DIR(fnode); 1085197953Sdelphij TMPFS_NODE_LOCK(de->td_node); 1086170808Sdelphij de->td_node->tn_dir.tn_parent = tdnode; 1087197953Sdelphij TMPFS_NODE_UNLOCK(de->td_node); 1088170808Sdelphij 1089170808Sdelphij /* As a result of changing the target of the '..' 1090170808Sdelphij * entry, the link count of the source and target 1091170808Sdelphij * directories has to be adjusted. */ 1092197953Sdelphij TMPFS_NODE_LOCK(tdnode); 1093197953Sdelphij TMPFS_ASSERT_LOCKED(tdnode); 1094197953Sdelphij tdnode->tn_links++; 1095197953Sdelphij TMPFS_NODE_UNLOCK(tdnode); 1096197953Sdelphij 1097197953Sdelphij TMPFS_NODE_LOCK(fdnode); 1098197953Sdelphij TMPFS_ASSERT_LOCKED(fdnode); 1099170808Sdelphij fdnode->tn_links--; 1100197953Sdelphij TMPFS_NODE_UNLOCK(fdnode); 1101170808Sdelphij } 1102170808Sdelphij 1103170808Sdelphij /* Do the move: just remove the entry from the source directory 1104170808Sdelphij * and insert it into the target one. */ 1105170808Sdelphij tmpfs_dir_detach(fdvp, de); 1106211598Sed if (fcnp->cn_flags & DOWHITEOUT) 1107211598Sed tmpfs_dir_whiteout_add(fdvp, fcnp); 1108211598Sed if (tcnp->cn_flags & ISWHITEOUT) 1109211598Sed tmpfs_dir_whiteout_remove(tdvp, tcnp); 1110170808Sdelphij tmpfs_dir_attach(tdvp, de); 1111170808Sdelphij } 1112170808Sdelphij 1113170808Sdelphij /* If the name has changed, we need to make it effective by changing 1114170808Sdelphij * it in the directory entry. */ 1115170808Sdelphij if (newname != NULL) { 1116170808Sdelphij MPASS(tcnp->cn_namelen <= MAXNAMLEN); 1117170808Sdelphij 1118171087Sdelphij free(de->td_name, M_TMPFSNAME); 1119170808Sdelphij de->td_namelen = (uint16_t)tcnp->cn_namelen; 1120170808Sdelphij memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen); 1121170808Sdelphij de->td_name = newname; 1122170808Sdelphij 1123170808Sdelphij fnode->tn_status |= TMPFS_NODE_CHANGED; 1124170808Sdelphij tdnode->tn_status |= TMPFS_NODE_MODIFIED; 1125170808Sdelphij } 1126170808Sdelphij 1127170808Sdelphij /* If we are overwriting an entry, we have to remove the old one 1128170808Sdelphij * from the target directory. */ 1129170808Sdelphij if (tvp != NULL) { 1130170808Sdelphij /* Remove the old entry from the target directory. */ 1131188318Skib de = tmpfs_dir_lookup(tdnode, tnode, tcnp); 1132170808Sdelphij tmpfs_dir_detach(tdvp, de); 1133170808Sdelphij 1134170808Sdelphij /* Free the directory entry we just deleted. Note that the 1135170808Sdelphij * node referred by it will not be removed until the vnode is 1136170808Sdelphij * really reclaimed. */ 1137170808Sdelphij tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), de, TRUE); 1138170808Sdelphij } 1139226987Spho cache_purge(fvp); 1140170808Sdelphij 1141170808Sdelphij error = 0; 1142170808Sdelphij 1143170808Sdelphijout_locked: 1144227822Sivoras if (fdvp != tdvp && fdvp != tvp) 1145175294Sattilio VOP_UNLOCK(fdvp, 0); 1146170808Sdelphij 1147170808Sdelphijout: 1148170808Sdelphij /* Release target nodes. */ 1149170808Sdelphij /* XXX: I don't understand when tdvp can be the same as tvp, but 1150170808Sdelphij * other code takes care of this... */ 1151170808Sdelphij if (tdvp == tvp) 1152170808Sdelphij vrele(tdvp); 1153170808Sdelphij else 1154170808Sdelphij vput(tdvp); 1155170808Sdelphij if (tvp != NULL) 1156170808Sdelphij vput(tvp); 1157170808Sdelphij 1158170808Sdelphij /* Release source nodes. */ 1159170808Sdelphij vrele(fdvp); 1160170808Sdelphij vrele(fvp); 1161170808Sdelphij 1162170808Sdelphij return error; 1163170808Sdelphij} 1164170808Sdelphij 1165170808Sdelphij/* --------------------------------------------------------------------- */ 1166170808Sdelphij 1167171069Sdelphijstatic int 1168170808Sdelphijtmpfs_mkdir(struct vop_mkdir_args *v) 1169170808Sdelphij{ 1170170808Sdelphij struct vnode *dvp = v->a_dvp; 1171170808Sdelphij struct vnode **vpp = v->a_vpp; 1172170808Sdelphij struct componentname *cnp = v->a_cnp; 1173170808Sdelphij struct vattr *vap = v->a_vap; 1174170808Sdelphij 1175170808Sdelphij MPASS(vap->va_type == VDIR); 1176170808Sdelphij 1177170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); 1178170808Sdelphij} 1179170808Sdelphij 1180170808Sdelphij/* --------------------------------------------------------------------- */ 1181170808Sdelphij 1182171069Sdelphijstatic int 1183170808Sdelphijtmpfs_rmdir(struct vop_rmdir_args *v) 1184170808Sdelphij{ 1185170808Sdelphij struct vnode *dvp = v->a_dvp; 1186170808Sdelphij struct vnode *vp = v->a_vp; 1187170808Sdelphij 1188170808Sdelphij int error; 1189170808Sdelphij struct tmpfs_dirent *de; 1190170808Sdelphij struct tmpfs_mount *tmp; 1191170808Sdelphij struct tmpfs_node *dnode; 1192170808Sdelphij struct tmpfs_node *node; 1193170808Sdelphij 1194176559Sattilio MPASS(VOP_ISLOCKED(dvp)); 1195176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1196170808Sdelphij 1197170808Sdelphij tmp = VFS_TO_TMPFS(dvp->v_mount); 1198170808Sdelphij dnode = VP_TO_TMPFS_DIR(dvp); 1199170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1200170808Sdelphij 1201171070Sdelphij /* Directories with more than two entries ('.' and '..') cannot be 1202171070Sdelphij * removed. */ 1203171070Sdelphij if (node->tn_size > 0) { 1204171070Sdelphij error = ENOTEMPTY; 1205171070Sdelphij goto out; 1206171070Sdelphij } 1207170808Sdelphij 1208170808Sdelphij if ((dnode->tn_flags & APPEND) 1209170808Sdelphij || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1210170808Sdelphij error = EPERM; 1211170808Sdelphij goto out; 1212170808Sdelphij } 1213170808Sdelphij 1214171070Sdelphij /* This invariant holds only if we are not trying to remove "..". 1215171070Sdelphij * We checked for that above so this is safe now. */ 1216170808Sdelphij MPASS(node->tn_dir.tn_parent == dnode); 1217170808Sdelphij 1218170808Sdelphij /* Get the directory entry associated with node (vp). This was 1219170808Sdelphij * filled by tmpfs_lookup while looking up the entry. */ 1220188318Skib de = tmpfs_dir_lookup(dnode, node, v->a_cnp); 1221170808Sdelphij MPASS(TMPFS_DIRENT_MATCHES(de, 1222170808Sdelphij v->a_cnp->cn_nameptr, 1223170808Sdelphij v->a_cnp->cn_namelen)); 1224170808Sdelphij 1225170808Sdelphij /* Check flags to see if we are allowed to remove the directory. */ 1226170808Sdelphij if (dnode->tn_flags & APPEND 1227170808Sdelphij || node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) { 1228170808Sdelphij error = EPERM; 1229170808Sdelphij goto out; 1230170808Sdelphij } 1231170808Sdelphij 1232197953Sdelphij 1233170808Sdelphij /* Detach the directory entry from the directory (dnode). */ 1234170808Sdelphij tmpfs_dir_detach(dvp, de); 1235211598Sed if (v->a_cnp->cn_flags & DOWHITEOUT) 1236211598Sed tmpfs_dir_whiteout_add(dvp, v->a_cnp); 1237170808Sdelphij 1238197953Sdelphij /* No vnode should be allocated for this entry from this point */ 1239197953Sdelphij TMPFS_NODE_LOCK(node); 1240197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1241170808Sdelphij node->tn_links--; 1242197953Sdelphij node->tn_dir.tn_parent = NULL; 1243170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | \ 1244170808Sdelphij TMPFS_NODE_MODIFIED; 1245197953Sdelphij 1246197953Sdelphij TMPFS_NODE_UNLOCK(node); 1247197953Sdelphij 1248197953Sdelphij TMPFS_NODE_LOCK(dnode); 1249197953Sdelphij TMPFS_ASSERT_ELOCKED(dnode); 1250197953Sdelphij dnode->tn_links--; 1251197953Sdelphij dnode->tn_status |= TMPFS_NODE_ACCESSED | \ 1252170808Sdelphij TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; 1253197953Sdelphij TMPFS_NODE_UNLOCK(dnode); 1254170808Sdelphij 1255171070Sdelphij cache_purge(dvp); 1256170808Sdelphij cache_purge(vp); 1257170808Sdelphij 1258170808Sdelphij /* Free the directory entry we just deleted. Note that the node 1259170808Sdelphij * referred by it will not be removed until the vnode is really 1260170808Sdelphij * reclaimed. */ 1261170808Sdelphij tmpfs_free_dirent(tmp, de, TRUE); 1262170808Sdelphij 1263170808Sdelphij /* Release the deleted vnode (will destroy the node, notify 1264170808Sdelphij * interested parties and clean it from the cache). */ 1265170808Sdelphij 1266170808Sdelphij dnode->tn_status |= TMPFS_NODE_CHANGED; 1267170808Sdelphij tmpfs_update(dvp); 1268170808Sdelphij 1269170808Sdelphij error = 0; 1270170808Sdelphij 1271170808Sdelphijout: 1272170808Sdelphij return error; 1273170808Sdelphij} 1274170808Sdelphij 1275170808Sdelphij/* --------------------------------------------------------------------- */ 1276170808Sdelphij 1277171069Sdelphijstatic int 1278170808Sdelphijtmpfs_symlink(struct vop_symlink_args *v) 1279170808Sdelphij{ 1280170808Sdelphij struct vnode *dvp = v->a_dvp; 1281170808Sdelphij struct vnode **vpp = v->a_vpp; 1282170808Sdelphij struct componentname *cnp = v->a_cnp; 1283170808Sdelphij struct vattr *vap = v->a_vap; 1284170808Sdelphij char *target = v->a_target; 1285170808Sdelphij 1286170808Sdelphij#ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ 1287170808Sdelphij MPASS(vap->va_type == VLNK); 1288170808Sdelphij#else 1289170808Sdelphij vap->va_type = VLNK; 1290170808Sdelphij#endif 1291170808Sdelphij 1292170808Sdelphij return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); 1293170808Sdelphij} 1294170808Sdelphij 1295170808Sdelphij/* --------------------------------------------------------------------- */ 1296170808Sdelphij 1297171069Sdelphijstatic int 1298170808Sdelphijtmpfs_readdir(struct vop_readdir_args *v) 1299170808Sdelphij{ 1300170808Sdelphij struct vnode *vp = v->a_vp; 1301170808Sdelphij struct uio *uio = v->a_uio; 1302170808Sdelphij int *eofflag = v->a_eofflag; 1303170808Sdelphij u_long **cookies = v->a_cookies; 1304170808Sdelphij int *ncookies = v->a_ncookies; 1305170808Sdelphij 1306170808Sdelphij int error; 1307170808Sdelphij off_t startoff; 1308171802Sdelphij off_t cnt = 0; 1309170808Sdelphij struct tmpfs_node *node; 1310170808Sdelphij 1311170808Sdelphij /* This operation only makes sense on directory nodes. */ 1312171802Sdelphij if (vp->v_type != VDIR) 1313171802Sdelphij return ENOTDIR; 1314170808Sdelphij 1315170808Sdelphij node = VP_TO_TMPFS_DIR(vp); 1316170808Sdelphij 1317170808Sdelphij startoff = uio->uio_offset; 1318170808Sdelphij 1319171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOT) { 1320170808Sdelphij error = tmpfs_dir_getdotdent(node, uio); 1321171862Sdelphij if (error != 0) 1322171862Sdelphij goto outok; 1323171862Sdelphij cnt++; 1324171862Sdelphij } 1325171862Sdelphij 1326171862Sdelphij if (uio->uio_offset == TMPFS_DIRCOOKIE_DOTDOT) { 1327170808Sdelphij error = tmpfs_dir_getdotdotdent(node, uio); 1328171862Sdelphij if (error != 0) 1329171862Sdelphij goto outok; 1330171862Sdelphij cnt++; 1331170808Sdelphij } 1332170808Sdelphij 1333171862Sdelphij error = tmpfs_dir_getdents(node, uio, &cnt); 1334171862Sdelphij 1335171862Sdelphijoutok: 1336171862Sdelphij MPASS(error >= -1); 1337171862Sdelphij 1338170808Sdelphij if (error == -1) 1339217633Skib error = (cnt != 0) ? 0 : EINVAL; 1340170808Sdelphij 1341170808Sdelphij if (eofflag != NULL) 1342170808Sdelphij *eofflag = 1343170808Sdelphij (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); 1344170808Sdelphij 1345170808Sdelphij /* Update NFS-related variables. */ 1346170808Sdelphij if (error == 0 && cookies != NULL && ncookies != NULL) { 1347170808Sdelphij off_t i; 1348170808Sdelphij off_t off = startoff; 1349170808Sdelphij struct tmpfs_dirent *de = NULL; 1350170808Sdelphij 1351170808Sdelphij *ncookies = cnt; 1352170808Sdelphij *cookies = malloc(cnt * sizeof(off_t), M_TEMP, M_WAITOK); 1353170808Sdelphij 1354170808Sdelphij for (i = 0; i < cnt; i++) { 1355170808Sdelphij MPASS(off != TMPFS_DIRCOOKIE_EOF); 1356170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOT) { 1357170808Sdelphij off = TMPFS_DIRCOOKIE_DOTDOT; 1358170808Sdelphij } else { 1359170808Sdelphij if (off == TMPFS_DIRCOOKIE_DOTDOT) { 1360170808Sdelphij de = TAILQ_FIRST(&node->tn_dir.tn_dirhead); 1361170808Sdelphij } else if (de != NULL) { 1362170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1363170808Sdelphij } else { 1364170808Sdelphij de = tmpfs_dir_lookupbycookie(node, 1365170808Sdelphij off); 1366170808Sdelphij MPASS(de != NULL); 1367170808Sdelphij de = TAILQ_NEXT(de, td_entries); 1368170808Sdelphij } 1369171802Sdelphij if (de == NULL) 1370170808Sdelphij off = TMPFS_DIRCOOKIE_EOF; 1371171802Sdelphij else 1372171802Sdelphij off = tmpfs_dircookie(de); 1373170808Sdelphij } 1374170808Sdelphij 1375170808Sdelphij (*cookies)[i] = off; 1376170808Sdelphij } 1377170808Sdelphij MPASS(uio->uio_offset == off); 1378170808Sdelphij } 1379170808Sdelphij 1380170808Sdelphij return error; 1381170808Sdelphij} 1382170808Sdelphij 1383170808Sdelphij/* --------------------------------------------------------------------- */ 1384170808Sdelphij 1385171069Sdelphijstatic int 1386170808Sdelphijtmpfs_readlink(struct vop_readlink_args *v) 1387170808Sdelphij{ 1388170808Sdelphij struct vnode *vp = v->a_vp; 1389170808Sdelphij struct uio *uio = v->a_uio; 1390170808Sdelphij 1391170808Sdelphij int error; 1392170808Sdelphij struct tmpfs_node *node; 1393170808Sdelphij 1394170808Sdelphij MPASS(uio->uio_offset == 0); 1395170808Sdelphij MPASS(vp->v_type == VLNK); 1396170808Sdelphij 1397170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1398170808Sdelphij 1399170808Sdelphij error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), 1400170808Sdelphij uio); 1401170808Sdelphij node->tn_status |= TMPFS_NODE_ACCESSED; 1402170808Sdelphij 1403170808Sdelphij return error; 1404170808Sdelphij} 1405170808Sdelphij 1406170808Sdelphij/* --------------------------------------------------------------------- */ 1407170808Sdelphij 1408171069Sdelphijstatic int 1409170808Sdelphijtmpfs_inactive(struct vop_inactive_args *v) 1410170808Sdelphij{ 1411170808Sdelphij struct vnode *vp = v->a_vp; 1412170808Sdelphij struct thread *l = v->a_td; 1413170808Sdelphij 1414170808Sdelphij struct tmpfs_node *node; 1415170808Sdelphij 1416176559Sattilio MPASS(VOP_ISLOCKED(vp)); 1417170808Sdelphij 1418170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1419170808Sdelphij 1420170808Sdelphij if (node->tn_links == 0) 1421170808Sdelphij vrecycle(vp, l); 1422170808Sdelphij 1423170808Sdelphij return 0; 1424170808Sdelphij} 1425170808Sdelphij 1426170808Sdelphij/* --------------------------------------------------------------------- */ 1427170808Sdelphij 1428170808Sdelphijint 1429170808Sdelphijtmpfs_reclaim(struct vop_reclaim_args *v) 1430170808Sdelphij{ 1431170808Sdelphij struct vnode *vp = v->a_vp; 1432170808Sdelphij 1433170808Sdelphij struct tmpfs_mount *tmp; 1434170808Sdelphij struct tmpfs_node *node; 1435170808Sdelphij 1436170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1437170808Sdelphij tmp = VFS_TO_TMPFS(vp->v_mount); 1438171070Sdelphij 1439170808Sdelphij vnode_destroy_vobject(vp); 1440170808Sdelphij cache_purge(vp); 1441197953Sdelphij 1442197953Sdelphij TMPFS_NODE_LOCK(node); 1443197953Sdelphij TMPFS_ASSERT_ELOCKED(node); 1444170808Sdelphij tmpfs_free_vp(vp); 1445170808Sdelphij 1446170808Sdelphij /* If the node referenced by this vnode was deleted by the user, 1447170808Sdelphij * we must free its associated data structures (now that the vnode 1448170808Sdelphij * is being reclaimed). */ 1449197953Sdelphij if (node->tn_links == 0 && 1450197953Sdelphij (node->tn_vpstate & TMPFS_VNODE_ALLOCATING) == 0) { 1451197953Sdelphij node->tn_vpstate = TMPFS_VNODE_DOOMED; 1452197953Sdelphij TMPFS_NODE_UNLOCK(node); 1453170808Sdelphij tmpfs_free_node(tmp, node); 1454197953Sdelphij } else 1455197953Sdelphij TMPFS_NODE_UNLOCK(node); 1456170808Sdelphij 1457170808Sdelphij MPASS(vp->v_data == NULL); 1458170808Sdelphij return 0; 1459170808Sdelphij} 1460170808Sdelphij 1461170808Sdelphij/* --------------------------------------------------------------------- */ 1462170808Sdelphij 1463171069Sdelphijstatic int 1464170808Sdelphijtmpfs_print(struct vop_print_args *v) 1465170808Sdelphij{ 1466170808Sdelphij struct vnode *vp = v->a_vp; 1467170808Sdelphij 1468170808Sdelphij struct tmpfs_node *node; 1469170808Sdelphij 1470170808Sdelphij node = VP_TO_TMPFS_NODE(vp); 1471170808Sdelphij 1472170808Sdelphij printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%x, links %d\n", 1473170808Sdelphij node, node->tn_flags, node->tn_links); 1474170808Sdelphij printf("\tmode 0%o, owner %d, group %d, size %" PRIdMAX 1475170808Sdelphij ", status 0x%x\n", 1476170808Sdelphij node->tn_mode, node->tn_uid, node->tn_gid, 1477170808Sdelphij (uintmax_t)node->tn_size, node->tn_status); 1478170808Sdelphij 1479170808Sdelphij if (vp->v_type == VFIFO) 1480170808Sdelphij fifo_printinfo(vp); 1481170808Sdelphij 1482170808Sdelphij printf("\n"); 1483170808Sdelphij 1484170808Sdelphij return 0; 1485170808Sdelphij} 1486170808Sdelphij 1487170808Sdelphij/* --------------------------------------------------------------------- */ 1488170808Sdelphij 1489171069Sdelphijstatic int 1490170808Sdelphijtmpfs_pathconf(struct vop_pathconf_args *v) 1491170808Sdelphij{ 1492170808Sdelphij int name = v->a_name; 1493170808Sdelphij register_t *retval = v->a_retval; 1494170808Sdelphij 1495170808Sdelphij int error; 1496170808Sdelphij 1497170808Sdelphij error = 0; 1498170808Sdelphij 1499170808Sdelphij switch (name) { 1500170808Sdelphij case _PC_LINK_MAX: 1501170808Sdelphij *retval = LINK_MAX; 1502170808Sdelphij break; 1503170808Sdelphij 1504170808Sdelphij case _PC_NAME_MAX: 1505170808Sdelphij *retval = NAME_MAX; 1506170808Sdelphij break; 1507170808Sdelphij 1508170808Sdelphij case _PC_PATH_MAX: 1509170808Sdelphij *retval = PATH_MAX; 1510170808Sdelphij break; 1511170808Sdelphij 1512170808Sdelphij case _PC_PIPE_BUF: 1513170808Sdelphij *retval = PIPE_BUF; 1514170808Sdelphij break; 1515170808Sdelphij 1516170808Sdelphij case _PC_CHOWN_RESTRICTED: 1517170808Sdelphij *retval = 1; 1518170808Sdelphij break; 1519170808Sdelphij 1520170808Sdelphij case _PC_NO_TRUNC: 1521170808Sdelphij *retval = 1; 1522170808Sdelphij break; 1523170808Sdelphij 1524170808Sdelphij case _PC_SYNC_IO: 1525170808Sdelphij *retval = 1; 1526170808Sdelphij break; 1527170808Sdelphij 1528170808Sdelphij case _PC_FILESIZEBITS: 1529170808Sdelphij *retval = 0; /* XXX Don't know which value should I return. */ 1530170808Sdelphij break; 1531170808Sdelphij 1532170808Sdelphij default: 1533170808Sdelphij error = EINVAL; 1534170808Sdelphij } 1535170808Sdelphij 1536170808Sdelphij return error; 1537170808Sdelphij} 1538170808Sdelphij 1539171069Sdelphijstatic int 1540170808Sdelphijtmpfs_vptofh(struct vop_vptofh_args *ap) 1541170808Sdelphij{ 1542170808Sdelphij struct tmpfs_fid *tfhp; 1543170808Sdelphij struct tmpfs_node *node; 1544170808Sdelphij 1545170808Sdelphij tfhp = (struct tmpfs_fid *)ap->a_fhp; 1546170808Sdelphij node = VP_TO_TMPFS_NODE(ap->a_vp); 1547170808Sdelphij 1548170808Sdelphij tfhp->tf_len = sizeof(struct tmpfs_fid); 1549170808Sdelphij tfhp->tf_id = node->tn_id; 1550170808Sdelphij tfhp->tf_gen = node->tn_gen; 1551171070Sdelphij 1552170808Sdelphij return (0); 1553170808Sdelphij} 1554171069Sdelphij 1555211598Sedstatic int 1556211598Sedtmpfs_whiteout(struct vop_whiteout_args *ap) 1557211598Sed{ 1558211598Sed struct vnode *dvp = ap->a_dvp; 1559211598Sed struct componentname *cnp = ap->a_cnp; 1560211598Sed struct tmpfs_dirent *de; 1561211598Sed 1562211598Sed switch (ap->a_flags) { 1563211598Sed case LOOKUP: 1564211598Sed return (0); 1565211598Sed case CREATE: 1566211598Sed de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(dvp), NULL, cnp); 1567211598Sed if (de != NULL) 1568211598Sed return (de->td_node == NULL ? 0 : EEXIST); 1569211598Sed return (tmpfs_dir_whiteout_add(dvp, cnp)); 1570211598Sed case DELETE: 1571211598Sed tmpfs_dir_whiteout_remove(dvp, cnp); 1572211598Sed return (0); 1573211598Sed default: 1574211598Sed panic("tmpfs_whiteout: unknown op"); 1575211598Sed } 1576211598Sed} 1577211598Sed 1578171069Sdelphij/* --------------------------------------------------------------------- */ 1579171069Sdelphij 1580171069Sdelphij/* 1581171069Sdelphij * vnode operations vector used for files stored in a tmpfs file system. 1582171069Sdelphij */ 1583171069Sdelphijstruct vop_vector tmpfs_vnodeop_entries = { 1584171069Sdelphij .vop_default = &default_vnodeops, 1585171069Sdelphij .vop_lookup = vfs_cache_lookup, 1586171069Sdelphij .vop_cachedlookup = tmpfs_lookup, 1587171069Sdelphij .vop_create = tmpfs_create, 1588171069Sdelphij .vop_mknod = tmpfs_mknod, 1589171069Sdelphij .vop_open = tmpfs_open, 1590171069Sdelphij .vop_close = tmpfs_close, 1591171069Sdelphij .vop_access = tmpfs_access, 1592171069Sdelphij .vop_getattr = tmpfs_getattr, 1593171069Sdelphij .vop_setattr = tmpfs_setattr, 1594171069Sdelphij .vop_read = tmpfs_read, 1595171069Sdelphij .vop_write = tmpfs_write, 1596171069Sdelphij .vop_fsync = tmpfs_fsync, 1597171069Sdelphij .vop_remove = tmpfs_remove, 1598171069Sdelphij .vop_link = tmpfs_link, 1599171069Sdelphij .vop_rename = tmpfs_rename, 1600171069Sdelphij .vop_mkdir = tmpfs_mkdir, 1601171069Sdelphij .vop_rmdir = tmpfs_rmdir, 1602171069Sdelphij .vop_symlink = tmpfs_symlink, 1603171069Sdelphij .vop_readdir = tmpfs_readdir, 1604171069Sdelphij .vop_readlink = tmpfs_readlink, 1605171069Sdelphij .vop_inactive = tmpfs_inactive, 1606171069Sdelphij .vop_reclaim = tmpfs_reclaim, 1607171069Sdelphij .vop_print = tmpfs_print, 1608171069Sdelphij .vop_pathconf = tmpfs_pathconf, 1609171069Sdelphij .vop_vptofh = tmpfs_vptofh, 1610211598Sed .vop_whiteout = tmpfs_whiteout, 1611171069Sdelphij .vop_bmap = VOP_EOPNOTSUPP, 1612171069Sdelphij}; 1613171069Sdelphij 1614