| 1 | /* $NetBSD: nfs_vnops.c,v 1.309 2016/01/19 10:56:59 hannken Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Rick Macklem at The University of Guelph. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | * vnode op calls for Sun NFS version 2 and 3 |
| 39 | */ |
| 40 | |
| 41 | #include <sys/cdefs.h> |
| 42 | __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.309 2016/01/19 10:56:59 hannken Exp $" ); |
| 43 | |
| 44 | #ifdef _KERNEL_OPT |
| 45 | #include "opt_nfs.h" |
| 46 | #include "opt_uvmhist.h" |
| 47 | #endif |
| 48 | |
| 49 | #include <sys/param.h> |
| 50 | #include <sys/proc.h> |
| 51 | #include <sys/kernel.h> |
| 52 | #include <sys/systm.h> |
| 53 | #include <sys/resourcevar.h> |
| 54 | #include <sys/mount.h> |
| 55 | #include <sys/buf.h> |
| 56 | #include <sys/condvar.h> |
| 57 | #include <sys/disk.h> |
| 58 | #include <sys/malloc.h> |
| 59 | #include <sys/kmem.h> |
| 60 | #include <sys/mbuf.h> |
| 61 | #include <sys/mutex.h> |
| 62 | #include <sys/namei.h> |
| 63 | #include <sys/vnode.h> |
| 64 | #include <sys/dirent.h> |
| 65 | #include <sys/fcntl.h> |
| 66 | #include <sys/hash.h> |
| 67 | #include <sys/lockf.h> |
| 68 | #include <sys/stat.h> |
| 69 | #include <sys/unistd.h> |
| 70 | #include <sys/kauth.h> |
| 71 | #include <sys/cprng.h> |
| 72 | |
| 73 | #include <uvm/uvm_extern.h> |
| 74 | #include <uvm/uvm.h> |
| 75 | |
| 76 | #include <miscfs/fifofs/fifo.h> |
| 77 | #include <miscfs/genfs/genfs.h> |
| 78 | #include <miscfs/genfs/genfs_node.h> |
| 79 | #include <miscfs/specfs/specdev.h> |
| 80 | |
| 81 | #include <nfs/rpcv2.h> |
| 82 | #include <nfs/nfsproto.h> |
| 83 | #include <nfs/nfs.h> |
| 84 | #include <nfs/nfsnode.h> |
| 85 | #include <nfs/nfsmount.h> |
| 86 | #include <nfs/xdr_subs.h> |
| 87 | #include <nfs/nfsm_subs.h> |
| 88 | #include <nfs/nfs_var.h> |
| 89 | |
| 90 | #include <net/if.h> |
| 91 | #include <netinet/in.h> |
| 92 | #include <netinet/in_var.h> |
| 93 | |
| 94 | /* |
| 95 | * Global vfs data structures for nfs |
| 96 | */ |
| 97 | int (**nfsv2_vnodeop_p)(void *); |
| 98 | const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { |
| 99 | { &vop_default_desc, vn_default_error }, |
| 100 | { &vop_lookup_desc, nfs_lookup }, /* lookup */ |
| 101 | { &vop_create_desc, nfs_create }, /* create */ |
| 102 | { &vop_mknod_desc, nfs_mknod }, /* mknod */ |
| 103 | { &vop_open_desc, nfs_open }, /* open */ |
| 104 | { &vop_close_desc, nfs_close }, /* close */ |
| 105 | { &vop_access_desc, nfs_access }, /* access */ |
| 106 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
| 107 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
| 108 | { &vop_read_desc, nfs_read }, /* read */ |
| 109 | { &vop_write_desc, nfs_write }, /* write */ |
| 110 | { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ |
| 111 | { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ |
| 112 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 113 | { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ |
| 114 | { &vop_poll_desc, nfs_poll }, /* poll */ |
| 115 | { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ |
| 116 | { &vop_revoke_desc, nfs_revoke }, /* revoke */ |
| 117 | { &vop_mmap_desc, nfs_mmap }, /* mmap */ |
| 118 | { &vop_fsync_desc, nfs_fsync }, /* fsync */ |
| 119 | { &vop_seek_desc, nfs_seek }, /* seek */ |
| 120 | { &vop_remove_desc, nfs_remove }, /* remove */ |
| 121 | { &vop_link_desc, nfs_link }, /* link */ |
| 122 | { &vop_rename_desc, nfs_rename }, /* rename */ |
| 123 | { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ |
| 124 | { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ |
| 125 | { &vop_symlink_desc, nfs_symlink }, /* symlink */ |
| 126 | { &vop_readdir_desc, nfs_readdir }, /* readdir */ |
| 127 | { &vop_readlink_desc, nfs_readlink }, /* readlink */ |
| 128 | { &vop_abortop_desc, nfs_abortop }, /* abortop */ |
| 129 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
| 130 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
| 131 | { &vop_lock_desc, nfs_lock }, /* lock */ |
| 132 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
| 133 | { &vop_bmap_desc, nfs_bmap }, /* bmap */ |
| 134 | { &vop_strategy_desc, nfs_strategy }, /* strategy */ |
| 135 | { &vop_print_desc, nfs_print }, /* print */ |
| 136 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
| 137 | { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ |
| 138 | { &vop_advlock_desc, nfs_advlock }, /* advlock */ |
| 139 | { &vop_bwrite_desc, genfs_badop }, /* bwrite */ |
| 140 | { &vop_getpages_desc, nfs_getpages }, /* getpages */ |
| 141 | { &vop_putpages_desc, genfs_putpages }, /* putpages */ |
| 142 | { NULL, NULL } |
| 143 | }; |
| 144 | const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = |
| 145 | { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; |
| 146 | |
| 147 | /* |
| 148 | * Special device vnode ops |
| 149 | */ |
| 150 | int (**spec_nfsv2nodeop_p)(void *); |
| 151 | const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { |
| 152 | { &vop_default_desc, vn_default_error }, |
| 153 | { &vop_lookup_desc, spec_lookup }, /* lookup */ |
| 154 | { &vop_create_desc, spec_create }, /* create */ |
| 155 | { &vop_mknod_desc, spec_mknod }, /* mknod */ |
| 156 | { &vop_open_desc, spec_open }, /* open */ |
| 157 | { &vop_close_desc, nfsspec_close }, /* close */ |
| 158 | { &vop_access_desc, nfsspec_access }, /* access */ |
| 159 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
| 160 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
| 161 | { &vop_read_desc, nfsspec_read }, /* read */ |
| 162 | { &vop_write_desc, nfsspec_write }, /* write */ |
| 163 | { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ |
| 164 | { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ |
| 165 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 166 | { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ |
| 167 | { &vop_poll_desc, spec_poll }, /* poll */ |
| 168 | { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ |
| 169 | { &vop_revoke_desc, spec_revoke }, /* revoke */ |
| 170 | { &vop_mmap_desc, spec_mmap }, /* mmap */ |
| 171 | { &vop_fsync_desc, spec_fsync }, /* fsync */ |
| 172 | { &vop_seek_desc, spec_seek }, /* seek */ |
| 173 | { &vop_remove_desc, spec_remove }, /* remove */ |
| 174 | { &vop_link_desc, spec_link }, /* link */ |
| 175 | { &vop_rename_desc, spec_rename }, /* rename */ |
| 176 | { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ |
| 177 | { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ |
| 178 | { &vop_symlink_desc, spec_symlink }, /* symlink */ |
| 179 | { &vop_readdir_desc, spec_readdir }, /* readdir */ |
| 180 | { &vop_readlink_desc, spec_readlink }, /* readlink */ |
| 181 | { &vop_abortop_desc, spec_abortop }, /* abortop */ |
| 182 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
| 183 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
| 184 | { &vop_lock_desc, nfs_lock }, /* lock */ |
| 185 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
| 186 | { &vop_bmap_desc, spec_bmap }, /* bmap */ |
| 187 | { &vop_strategy_desc, spec_strategy }, /* strategy */ |
| 188 | { &vop_print_desc, nfs_print }, /* print */ |
| 189 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
| 190 | { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ |
| 191 | { &vop_advlock_desc, spec_advlock }, /* advlock */ |
| 192 | { &vop_bwrite_desc, spec_bwrite }, /* bwrite */ |
| 193 | { &vop_getpages_desc, spec_getpages }, /* getpages */ |
| 194 | { &vop_putpages_desc, spec_putpages }, /* putpages */ |
| 195 | { NULL, NULL } |
| 196 | }; |
| 197 | const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = |
| 198 | { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; |
| 199 | |
| 200 | int (**fifo_nfsv2nodeop_p)(void *); |
| 201 | const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { |
| 202 | { &vop_default_desc, vn_default_error }, |
| 203 | { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */ |
| 204 | { &vop_create_desc, vn_fifo_bypass }, /* create */ |
| 205 | { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */ |
| 206 | { &vop_open_desc, vn_fifo_bypass }, /* open */ |
| 207 | { &vop_close_desc, nfsfifo_close }, /* close */ |
| 208 | { &vop_access_desc, nfsspec_access }, /* access */ |
| 209 | { &vop_getattr_desc, nfs_getattr }, /* getattr */ |
| 210 | { &vop_setattr_desc, nfs_setattr }, /* setattr */ |
| 211 | { &vop_read_desc, nfsfifo_read }, /* read */ |
| 212 | { &vop_write_desc, nfsfifo_write }, /* write */ |
| 213 | { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ |
| 214 | { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ |
| 215 | { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ |
| 216 | { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ |
| 217 | { &vop_poll_desc, vn_fifo_bypass }, /* poll */ |
| 218 | { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ |
| 219 | { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */ |
| 220 | { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */ |
| 221 | { &vop_fsync_desc, nfs_fsync }, /* fsync */ |
| 222 | { &vop_seek_desc, vn_fifo_bypass }, /* seek */ |
| 223 | { &vop_remove_desc, vn_fifo_bypass }, /* remove */ |
| 224 | { &vop_link_desc, vn_fifo_bypass }, /* link */ |
| 225 | { &vop_rename_desc, vn_fifo_bypass }, /* rename */ |
| 226 | { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */ |
| 227 | { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */ |
| 228 | { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */ |
| 229 | { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */ |
| 230 | { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */ |
| 231 | { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */ |
| 232 | { &vop_inactive_desc, nfs_inactive }, /* inactive */ |
| 233 | { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ |
| 234 | { &vop_lock_desc, nfs_lock }, /* lock */ |
| 235 | { &vop_unlock_desc, nfs_unlock }, /* unlock */ |
| 236 | { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */ |
| 237 | { &vop_strategy_desc, genfs_badop }, /* strategy */ |
| 238 | { &vop_print_desc, nfs_print }, /* print */ |
| 239 | { &vop_islocked_desc, nfs_islocked }, /* islocked */ |
| 240 | { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ |
| 241 | { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */ |
| 242 | { &vop_bwrite_desc, genfs_badop }, /* bwrite */ |
| 243 | { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */ |
| 244 | { NULL, NULL } |
| 245 | }; |
| 246 | const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = |
| 247 | { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; |
| 248 | |
| 249 | static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, |
| 250 | size_t, kauth_cred_t, struct lwp *); |
| 251 | static void nfs_writerpc_extfree(struct mbuf *, void *, size_t, void *); |
| 252 | |
| 253 | /* |
| 254 | * Global variables |
| 255 | */ |
| 256 | extern u_int32_t nfs_true, nfs_false; |
| 257 | extern u_int32_t nfs_xdrneg1; |
| 258 | extern const nfstype nfsv3_type[9]; |
| 259 | |
| 260 | int nfs_numasync = 0; |
| 261 | #define DIRHDSIZ _DIRENT_NAMEOFF(dp) |
| 262 | #define UIO_ADVANCE(uio, siz) \ |
| 263 | (void)((uio)->uio_resid -= (siz), \ |
| 264 | (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ |
| 265 | (uio)->uio_iov->iov_len -= (siz)) |
| 266 | |
| 267 | static void nfs_cache_enter(struct vnode *, struct vnode *, |
| 268 | struct componentname *); |
| 269 | |
| 270 | static void |
| 271 | nfs_cache_enter(struct vnode *dvp, struct vnode *vp, |
| 272 | struct componentname *cnp) |
| 273 | { |
| 274 | struct nfsnode *dnp = VTONFS(dvp); |
| 275 | |
| 276 | if ((cnp->cn_flags & MAKEENTRY) == 0) { |
| 277 | return; |
| 278 | } |
| 279 | if (vp != NULL) { |
| 280 | struct nfsnode *np = VTONFS(vp); |
| 281 | |
| 282 | np->n_ctime = np->n_vattr->va_ctime.tv_sec; |
| 283 | } |
| 284 | |
| 285 | if (!timespecisset(&dnp->n_nctime)) |
| 286 | dnp->n_nctime = dnp->n_vattr->va_mtime; |
| 287 | |
| 288 | cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_flags); |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * nfs null call from vfs. |
| 293 | */ |
| 294 | int |
| 295 | nfs_null(struct vnode *vp, kauth_cred_t cred, struct lwp *l) |
| 296 | { |
| 297 | char *bpos, *dpos; |
| 298 | int error = 0; |
| 299 | struct mbuf *mreq, *mrep, *md, *mb __unused; |
| 300 | struct nfsnode *np = VTONFS(vp); |
| 301 | |
| 302 | nfsm_reqhead(np, NFSPROC_NULL, 0); |
| 303 | nfsm_request(np, NFSPROC_NULL, l, cred); |
| 304 | nfsm_reqdone; |
| 305 | return (error); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * nfs access vnode op. |
| 310 | * For nfs version 2, just return ok. File accesses may fail later. |
| 311 | * For nfs version 3, use the access rpc to check accessibility. If file modes |
| 312 | * are changed on the server, accesses might still fail later. |
| 313 | */ |
| 314 | int |
| 315 | nfs_access(void *v) |
| 316 | { |
| 317 | struct vop_access_args /* { |
| 318 | struct vnode *a_vp; |
| 319 | int a_mode; |
| 320 | kauth_cred_t a_cred; |
| 321 | } */ *ap = v; |
| 322 | struct vnode *vp = ap->a_vp; |
| 323 | #ifndef NFS_V2_ONLY |
| 324 | u_int32_t *tl; |
| 325 | char *cp; |
| 326 | int32_t t1, t2; |
| 327 | char *bpos, *dpos, *cp2; |
| 328 | int error = 0, attrflag; |
| 329 | struct mbuf *mreq, *mrep, *md, *mb; |
| 330 | u_int32_t mode, rmode; |
| 331 | const int v3 = NFS_ISV3(vp); |
| 332 | #endif |
| 333 | int cachevalid; |
| 334 | struct nfsnode *np = VTONFS(vp); |
| 335 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 336 | |
| 337 | cachevalid = (np->n_accstamp != -1 && |
| 338 | (time_uptime - np->n_accstamp) < nfs_attrtimeo(nmp, np) && |
| 339 | np->n_accuid == kauth_cred_geteuid(ap->a_cred)); |
| 340 | |
| 341 | /* |
| 342 | * Check access cache first. If this request has been made for this |
| 343 | * uid shortly before, use the cached result. |
| 344 | */ |
| 345 | if (cachevalid) { |
| 346 | if (!np->n_accerror) { |
| 347 | if ((np->n_accmode & ap->a_mode) == ap->a_mode) |
| 348 | return np->n_accerror; |
| 349 | } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) |
| 350 | return np->n_accerror; |
| 351 | } |
| 352 | |
| 353 | #ifndef NFS_V2_ONLY |
| 354 | /* |
| 355 | * For nfs v3, do an access rpc, otherwise you are stuck emulating |
| 356 | * ufs_access() locally using the vattr. This may not be correct, |
| 357 | * since the server may apply other access criteria such as |
| 358 | * client uid-->server uid mapping that we do not know about, but |
| 359 | * this is better than just returning anything that is lying about |
| 360 | * in the cache. |
| 361 | */ |
| 362 | if (v3) { |
| 363 | nfsstats.rpccnt[NFSPROC_ACCESS]++; |
| 364 | nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); |
| 365 | nfsm_fhtom(np, v3); |
| 366 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 367 | if (ap->a_mode & VREAD) |
| 368 | mode = NFSV3ACCESS_READ; |
| 369 | else |
| 370 | mode = 0; |
| 371 | if (vp->v_type != VDIR) { |
| 372 | if (ap->a_mode & VWRITE) |
| 373 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); |
| 374 | if (ap->a_mode & VEXEC) |
| 375 | mode |= NFSV3ACCESS_EXECUTE; |
| 376 | } else { |
| 377 | if (ap->a_mode & VWRITE) |
| 378 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | |
| 379 | NFSV3ACCESS_DELETE); |
| 380 | if (ap->a_mode & VEXEC) |
| 381 | mode |= NFSV3ACCESS_LOOKUP; |
| 382 | } |
| 383 | *tl = txdr_unsigned(mode); |
| 384 | nfsm_request(np, NFSPROC_ACCESS, curlwp, ap->a_cred); |
| 385 | nfsm_postop_attr(vp, attrflag, 0); |
| 386 | if (!error) { |
| 387 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 388 | rmode = fxdr_unsigned(u_int32_t, *tl); |
| 389 | /* |
| 390 | * The NFS V3 spec does not clarify whether or not |
| 391 | * the returned access bits can be a superset of |
| 392 | * the ones requested, so... |
| 393 | */ |
| 394 | if ((rmode & mode) != mode) |
| 395 | error = EACCES; |
| 396 | } |
| 397 | nfsm_reqdone; |
| 398 | } else |
| 399 | #endif |
| 400 | return (nfsspec_access(ap)); |
| 401 | #ifndef NFS_V2_ONLY |
| 402 | /* |
| 403 | * Disallow write attempts on filesystems mounted read-only; |
| 404 | * unless the file is a socket, fifo, or a block or character |
| 405 | * device resident on the filesystem. |
| 406 | */ |
| 407 | if (!error && (ap->a_mode & VWRITE) && |
| 408 | (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 409 | switch (vp->v_type) { |
| 410 | case VREG: |
| 411 | case VDIR: |
| 412 | case VLNK: |
| 413 | error = EROFS; |
| 414 | default: |
| 415 | break; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | if (!error || error == EACCES) { |
| 420 | /* |
| 421 | * If we got the same result as for a previous, |
| 422 | * different request, OR it in. Don't update |
| 423 | * the timestamp in that case. |
| 424 | */ |
| 425 | if (cachevalid && np->n_accstamp != -1 && |
| 426 | error == np->n_accerror) { |
| 427 | if (!error) |
| 428 | np->n_accmode |= ap->a_mode; |
| 429 | else if ((np->n_accmode & ap->a_mode) == ap->a_mode) |
| 430 | np->n_accmode = ap->a_mode; |
| 431 | } else { |
| 432 | np->n_accstamp = time_uptime; |
| 433 | np->n_accuid = kauth_cred_geteuid(ap->a_cred); |
| 434 | np->n_accmode = ap->a_mode; |
| 435 | np->n_accerror = error; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | return (error); |
| 440 | #endif |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * nfs open vnode op |
| 445 | * Check to see if the type is ok |
| 446 | * and that deletion is not in progress. |
| 447 | * For paged in text files, you will need to flush the page cache |
| 448 | * if consistency is lost. |
| 449 | */ |
| 450 | /* ARGSUSED */ |
| 451 | int |
| 452 | nfs_open(void *v) |
| 453 | { |
| 454 | struct vop_open_args /* { |
| 455 | struct vnode *a_vp; |
| 456 | int a_mode; |
| 457 | kauth_cred_t a_cred; |
| 458 | } */ *ap = v; |
| 459 | struct vnode *vp = ap->a_vp; |
| 460 | struct nfsnode *np = VTONFS(vp); |
| 461 | int error; |
| 462 | |
| 463 | if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { |
| 464 | return (EACCES); |
| 465 | } |
| 466 | |
| 467 | if (ap->a_mode & FREAD) { |
| 468 | if (np->n_rcred != NULL) |
| 469 | kauth_cred_free(np->n_rcred); |
| 470 | np->n_rcred = ap->a_cred; |
| 471 | kauth_cred_hold(np->n_rcred); |
| 472 | } |
| 473 | if (ap->a_mode & FWRITE) { |
| 474 | if (np->n_wcred != NULL) |
| 475 | kauth_cred_free(np->n_wcred); |
| 476 | np->n_wcred = ap->a_cred; |
| 477 | kauth_cred_hold(np->n_wcred); |
| 478 | } |
| 479 | |
| 480 | error = nfs_flushstalebuf(vp, ap->a_cred, curlwp, 0); |
| 481 | if (error) |
| 482 | return error; |
| 483 | |
| 484 | NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ |
| 485 | |
| 486 | return (0); |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * nfs close vnode op |
| 491 | * What an NFS client should do upon close after writing is a debatable issue. |
| 492 | * Most NFS clients push delayed writes to the server upon close, basically for |
| 493 | * two reasons: |
| 494 | * 1 - So that any write errors may be reported back to the client process |
| 495 | * doing the close system call. By far the two most likely errors are |
| 496 | * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. |
| 497 | * 2 - To put a worst case upper bound on cache inconsistency between |
| 498 | * multiple clients for the file. |
| 499 | * There is also a consistency problem for Version 2 of the protocol w.r.t. |
| 500 | * not being able to tell if other clients are writing a file concurrently, |
| 501 | * since there is no way of knowing if the changed modify time in the reply |
| 502 | * is only due to the write for this client. |
| 503 | * (NFS Version 3 provides weak cache consistency data in the reply that |
| 504 | * should be sufficient to detect and handle this case.) |
| 505 | * |
| 506 | * The current code does the following: |
| 507 | * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers |
| 508 | * for NFS Version 3 - flush dirty buffers to the server but don't invalidate |
| 509 | * or commit them (this satisfies 1 and 2 except for the |
| 510 | * case where the server crashes after this close but |
| 511 | * before the commit RPC, which is felt to be "good |
| 512 | * enough". Changing the last argument to nfs_flush() to |
| 513 | * a 1 would force a commit operation, if it is felt a |
| 514 | * commit is necessary now. |
| 515 | */ |
| 516 | /* ARGSUSED */ |
| 517 | int |
| 518 | nfs_close(void *v) |
| 519 | { |
| 520 | struct vop_close_args /* { |
| 521 | struct vnodeop_desc *a_desc; |
| 522 | struct vnode *a_vp; |
| 523 | int a_fflag; |
| 524 | kauth_cred_t a_cred; |
| 525 | } */ *ap = v; |
| 526 | struct vnode *vp = ap->a_vp; |
| 527 | struct nfsnode *np = VTONFS(vp); |
| 528 | int error = 0; |
| 529 | UVMHIST_FUNC("nfs_close" ); UVMHIST_CALLED(ubchist); |
| 530 | |
| 531 | if (vp->v_type == VREG) { |
| 532 | if (np->n_flag & NMODIFIED) { |
| 533 | #ifndef NFS_V2_ONLY |
| 534 | if (NFS_ISV3(vp)) { |
| 535 | error = nfs_flush(vp, ap->a_cred, MNT_WAIT, curlwp, 0); |
| 536 | np->n_flag &= ~NMODIFIED; |
| 537 | } else |
| 538 | #endif |
| 539 | error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1); |
| 540 | NFS_INVALIDATE_ATTRCACHE(np); |
| 541 | } |
| 542 | if (np->n_flag & NWRITEERR) { |
| 543 | np->n_flag &= ~NWRITEERR; |
| 544 | error = np->n_error; |
| 545 | } |
| 546 | } |
| 547 | UVMHIST_LOG(ubchist, "returning %d" , error,0,0,0); |
| 548 | return (error); |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * nfs getattr call from vfs. |
| 553 | */ |
| 554 | int |
| 555 | nfs_getattr(void *v) |
| 556 | { |
| 557 | struct vop_getattr_args /* { |
| 558 | struct vnode *a_vp; |
| 559 | struct vattr *a_vap; |
| 560 | kauth_cred_t a_cred; |
| 561 | } */ *ap = v; |
| 562 | struct vnode *vp = ap->a_vp; |
| 563 | struct nfsnode *np = VTONFS(vp); |
| 564 | char *cp; |
| 565 | u_int32_t *tl; |
| 566 | int32_t t1, t2; |
| 567 | char *bpos, *dpos; |
| 568 | int error = 0; |
| 569 | struct mbuf *mreq, *mrep, *md, *mb; |
| 570 | const int v3 = NFS_ISV3(vp); |
| 571 | |
| 572 | /* |
| 573 | * Update local times for special files. |
| 574 | */ |
| 575 | if (np->n_flag & (NACC | NUPD)) |
| 576 | np->n_flag |= NCHG; |
| 577 | |
| 578 | /* |
| 579 | * if we have delayed truncation, do it now. |
| 580 | */ |
| 581 | nfs_delayedtruncate(vp); |
| 582 | |
| 583 | /* |
| 584 | * First look in the cache. |
| 585 | */ |
| 586 | if (nfs_getattrcache(vp, ap->a_vap) == 0) |
| 587 | return (0); |
| 588 | nfsstats.rpccnt[NFSPROC_GETATTR]++; |
| 589 | nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); |
| 590 | nfsm_fhtom(np, v3); |
| 591 | nfsm_request(np, NFSPROC_GETATTR, curlwp, ap->a_cred); |
| 592 | if (!error) { |
| 593 | nfsm_loadattr(vp, ap->a_vap, 0); |
| 594 | if (vp->v_type == VDIR && |
| 595 | ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) |
| 596 | ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; |
| 597 | } |
| 598 | nfsm_reqdone; |
| 599 | return (error); |
| 600 | } |
| 601 | |
| 602 | /* |
| 603 | * nfs setattr call. |
| 604 | */ |
| 605 | int |
| 606 | nfs_setattr(void *v) |
| 607 | { |
| 608 | struct vop_setattr_args /* { |
| 609 | struct vnodeop_desc *a_desc; |
| 610 | struct vnode *a_vp; |
| 611 | struct vattr *a_vap; |
| 612 | kauth_cred_t a_cred; |
| 613 | } */ *ap = v; |
| 614 | struct vnode *vp = ap->a_vp; |
| 615 | struct nfsnode *np = VTONFS(vp); |
| 616 | struct vattr *vap = ap->a_vap; |
| 617 | int error = 0; |
| 618 | u_quad_t tsize = 0; |
| 619 | |
| 620 | /* |
| 621 | * Setting of flags is not supported. |
| 622 | */ |
| 623 | if (vap->va_flags != VNOVAL) |
| 624 | return (EOPNOTSUPP); |
| 625 | |
| 626 | /* |
| 627 | * Disallow write attempts if the filesystem is mounted read-only. |
| 628 | */ |
| 629 | if ((vap->va_uid != (uid_t)VNOVAL || |
| 630 | vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || |
| 631 | vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && |
| 632 | (vp->v_mount->mnt_flag & MNT_RDONLY)) |
| 633 | return (EROFS); |
| 634 | if (vap->va_size != VNOVAL) { |
| 635 | if (vap->va_size > VFSTONFS(vp->v_mount)->nm_maxfilesize) { |
| 636 | return EFBIG; |
| 637 | } |
| 638 | switch (vp->v_type) { |
| 639 | case VDIR: |
| 640 | return (EISDIR); |
| 641 | case VCHR: |
| 642 | case VBLK: |
| 643 | case VSOCK: |
| 644 | case VFIFO: |
| 645 | if (vap->va_mtime.tv_sec == VNOVAL && |
| 646 | vap->va_atime.tv_sec == VNOVAL && |
| 647 | vap->va_mode == (mode_t)VNOVAL && |
| 648 | vap->va_uid == (uid_t)VNOVAL && |
| 649 | vap->va_gid == (gid_t)VNOVAL) |
| 650 | return (0); |
| 651 | vap->va_size = VNOVAL; |
| 652 | break; |
| 653 | default: |
| 654 | /* |
| 655 | * Disallow write attempts if the filesystem is |
| 656 | * mounted read-only. |
| 657 | */ |
| 658 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 659 | return (EROFS); |
| 660 | genfs_node_wrlock(vp); |
| 661 | uvm_vnp_setsize(vp, vap->va_size); |
| 662 | tsize = np->n_size; |
| 663 | np->n_size = vap->va_size; |
| 664 | if (vap->va_size == 0) |
| 665 | error = nfs_vinvalbuf(vp, 0, |
| 666 | ap->a_cred, curlwp, 1); |
| 667 | else |
| 668 | error = nfs_vinvalbuf(vp, V_SAVE, |
| 669 | ap->a_cred, curlwp, 1); |
| 670 | if (error) { |
| 671 | uvm_vnp_setsize(vp, tsize); |
| 672 | genfs_node_unlock(vp); |
| 673 | return (error); |
| 674 | } |
| 675 | np->n_vattr->va_size = vap->va_size; |
| 676 | } |
| 677 | } else { |
| 678 | /* |
| 679 | * flush files before setattr because a later write of |
| 680 | * cached data might change timestamps or reset sugid bits |
| 681 | */ |
| 682 | if ((vap->va_mtime.tv_sec != VNOVAL || |
| 683 | vap->va_atime.tv_sec != VNOVAL || |
| 684 | vap->va_mode != VNOVAL) && |
| 685 | vp->v_type == VREG && |
| 686 | (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, |
| 687 | curlwp, 1)) == EINTR) |
| 688 | return (error); |
| 689 | } |
| 690 | error = nfs_setattrrpc(vp, vap, ap->a_cred, curlwp); |
| 691 | if (vap->va_size != VNOVAL) { |
| 692 | if (error) { |
| 693 | np->n_size = np->n_vattr->va_size = tsize; |
| 694 | uvm_vnp_setsize(vp, np->n_size); |
| 695 | } |
| 696 | genfs_node_unlock(vp); |
| 697 | } |
| 698 | VN_KNOTE(vp, NOTE_ATTRIB); |
| 699 | return (error); |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * Do an nfs setattr rpc. |
| 704 | */ |
| 705 | int |
| 706 | nfs_setattrrpc(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, struct lwp *l) |
| 707 | { |
| 708 | struct nfsv2_sattr *sp; |
| 709 | char *cp; |
| 710 | int32_t t1, t2; |
| 711 | char *bpos, *dpos; |
| 712 | u_int32_t *tl; |
| 713 | int error = 0; |
| 714 | struct mbuf *mreq, *mrep, *md, *mb; |
| 715 | const int v3 = NFS_ISV3(vp); |
| 716 | struct nfsnode *np = VTONFS(vp); |
| 717 | #ifndef NFS_V2_ONLY |
| 718 | int wccflag = NFSV3_WCCRATTR; |
| 719 | char *cp2; |
| 720 | #endif |
| 721 | |
| 722 | nfsstats.rpccnt[NFSPROC_SETATTR]++; |
| 723 | nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); |
| 724 | nfsm_fhtom(np, v3); |
| 725 | #ifndef NFS_V2_ONLY |
| 726 | if (v3) { |
| 727 | nfsm_v3attrbuild(vap, true); |
| 728 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 729 | *tl = nfs_false; |
| 730 | } else { |
| 731 | #endif |
| 732 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 733 | if (vap->va_mode == (mode_t)VNOVAL) |
| 734 | sp->sa_mode = nfs_xdrneg1; |
| 735 | else |
| 736 | sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); |
| 737 | if (vap->va_uid == (uid_t)VNOVAL) |
| 738 | sp->sa_uid = nfs_xdrneg1; |
| 739 | else |
| 740 | sp->sa_uid = txdr_unsigned(vap->va_uid); |
| 741 | if (vap->va_gid == (gid_t)VNOVAL) |
| 742 | sp->sa_gid = nfs_xdrneg1; |
| 743 | else |
| 744 | sp->sa_gid = txdr_unsigned(vap->va_gid); |
| 745 | sp->sa_size = txdr_unsigned(vap->va_size); |
| 746 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 747 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 748 | #ifndef NFS_V2_ONLY |
| 749 | } |
| 750 | #endif |
| 751 | nfsm_request(np, NFSPROC_SETATTR, l, cred); |
| 752 | #ifndef NFS_V2_ONLY |
| 753 | if (v3) { |
| 754 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); |
| 755 | } else |
| 756 | #endif |
| 757 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
| 758 | nfsm_reqdone; |
| 759 | return (error); |
| 760 | } |
| 761 | |
| 762 | /* |
| 763 | * nfs lookup call, one step at a time... |
| 764 | * First look in cache |
| 765 | * If not found, do the rpc. |
| 766 | */ |
| 767 | int |
| 768 | nfs_lookup(void *v) |
| 769 | { |
| 770 | struct vop_lookup_v2_args /* { |
| 771 | struct vnodeop_desc *a_desc; |
| 772 | struct vnode *a_dvp; |
| 773 | struct vnode **a_vpp; |
| 774 | struct componentname *a_cnp; |
| 775 | } */ *ap = v; |
| 776 | struct componentname *cnp = ap->a_cnp; |
| 777 | struct vnode *dvp = ap->a_dvp; |
| 778 | struct vnode **vpp = ap->a_vpp; |
| 779 | int flags; |
| 780 | struct vnode *newvp; |
| 781 | u_int32_t *tl; |
| 782 | char *cp; |
| 783 | int32_t t1, t2; |
| 784 | char *bpos, *dpos, *cp2; |
| 785 | struct mbuf *mreq, *mrep, *md, *mb; |
| 786 | long len; |
| 787 | nfsfh_t *fhp; |
| 788 | struct nfsnode *np; |
| 789 | int cachefound; |
| 790 | int error = 0, attrflag, fhsize; |
| 791 | const int v3 = NFS_ISV3(dvp); |
| 792 | |
| 793 | flags = cnp->cn_flags; |
| 794 | |
| 795 | *vpp = NULLVP; |
| 796 | newvp = NULLVP; |
| 797 | if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && |
| 798 | (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) |
| 799 | return (EROFS); |
| 800 | if (dvp->v_type != VDIR) |
| 801 | return (ENOTDIR); |
| 802 | |
| 803 | /* |
| 804 | * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. |
| 805 | */ |
| 806 | if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { |
| 807 | error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); |
| 808 | if (error) |
| 809 | return error; |
| 810 | if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) |
| 811 | return EISDIR; |
| 812 | vref(dvp); |
| 813 | *vpp = dvp; |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | np = VTONFS(dvp); |
| 818 | |
| 819 | /* |
| 820 | * Before performing an RPC, check the name cache to see if |
| 821 | * the directory/name pair we are looking for is known already. |
| 822 | * If the directory/name pair is found in the name cache, |
| 823 | * we have to ensure the directory has not changed from |
| 824 | * the time the cache entry has been created. If it has, |
| 825 | * the cache entry has to be ignored. |
| 826 | */ |
| 827 | cachefound = cache_lookup_raw(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 828 | cnp->cn_flags, NULL, vpp); |
| 829 | KASSERT(dvp != *vpp); |
| 830 | KASSERT((cnp->cn_flags & ISWHITEOUT) == 0); |
| 831 | if (cachefound) { |
| 832 | struct vattr vattr; |
| 833 | |
| 834 | error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); |
| 835 | if (error != 0) { |
| 836 | if (*vpp != NULLVP) |
| 837 | vrele(*vpp); |
| 838 | *vpp = NULLVP; |
| 839 | return error; |
| 840 | } |
| 841 | |
| 842 | if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred) |
| 843 | || timespeccmp(&vattr.va_mtime, |
| 844 | &VTONFS(dvp)->n_nctime, !=)) { |
| 845 | if (*vpp != NULLVP) { |
| 846 | vrele(*vpp); |
| 847 | *vpp = NULLVP; |
| 848 | } |
| 849 | cache_purge1(dvp, NULL, 0, PURGE_CHILDREN); |
| 850 | timespecclear(&np->n_nctime); |
| 851 | goto dorpc; |
| 852 | } |
| 853 | |
| 854 | if (*vpp == NULLVP) { |
| 855 | /* namecache gave us a negative result */ |
| 856 | error = ENOENT; |
| 857 | goto noentry; |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | * investigate the vnode returned by cache_lookup_raw. |
| 862 | * if it isn't appropriate, do an rpc. |
| 863 | */ |
| 864 | newvp = *vpp; |
| 865 | if ((flags & ISDOTDOT) != 0) { |
| 866 | VOP_UNLOCK(dvp); |
| 867 | } |
| 868 | error = vn_lock(newvp, LK_SHARED); |
| 869 | if ((flags & ISDOTDOT) != 0) { |
| 870 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
| 871 | } |
| 872 | if (error != 0) { |
| 873 | /* newvp has been reclaimed. */ |
| 874 | vrele(newvp); |
| 875 | *vpp = NULLVP; |
| 876 | goto dorpc; |
| 877 | } |
| 878 | if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) |
| 879 | && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { |
| 880 | nfsstats.lookupcache_hits++; |
| 881 | KASSERT(newvp->v_type != VNON); |
| 882 | VOP_UNLOCK(newvp); |
| 883 | return (0); |
| 884 | } |
| 885 | cache_purge1(newvp, NULL, 0, PURGE_PARENTS); |
| 886 | vput(newvp); |
| 887 | *vpp = NULLVP; |
| 888 | } |
| 889 | dorpc: |
| 890 | #if 0 |
| 891 | /* |
| 892 | * because nfsv3 has the same CREATE semantics as ours, |
| 893 | * we don't have to perform LOOKUPs beforehand. |
| 894 | * |
| 895 | * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. |
| 896 | * XXX although we have no way to know if O_EXCL is requested or not. |
| 897 | */ |
| 898 | |
| 899 | if (v3 && cnp->cn_nameiop == CREATE && |
| 900 | (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && |
| 901 | (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 902 | return (EJUSTRETURN); |
| 903 | } |
| 904 | #endif /* 0 */ |
| 905 | |
| 906 | error = 0; |
| 907 | newvp = NULLVP; |
| 908 | nfsstats.lookupcache_misses++; |
| 909 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 910 | len = cnp->cn_namelen; |
| 911 | nfsm_reqhead(np, NFSPROC_LOOKUP, |
| 912 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 913 | nfsm_fhtom(np, v3); |
| 914 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 915 | nfsm_request(np, NFSPROC_LOOKUP, curlwp, cnp->cn_cred); |
| 916 | if (error) { |
| 917 | nfsm_postop_attr(dvp, attrflag, 0); |
| 918 | m_freem(mrep); |
| 919 | goto nfsmout; |
| 920 | } |
| 921 | nfsm_getfh(fhp, fhsize, v3); |
| 922 | |
| 923 | /* |
| 924 | * Handle RENAME case... |
| 925 | */ |
| 926 | if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { |
| 927 | if (NFS_CMPFH(np, fhp, fhsize)) { |
| 928 | m_freem(mrep); |
| 929 | return (EISDIR); |
| 930 | } |
| 931 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 932 | if (error) { |
| 933 | m_freem(mrep); |
| 934 | return error; |
| 935 | } |
| 936 | newvp = NFSTOV(np); |
| 937 | #ifndef NFS_V2_ONLY |
| 938 | if (v3) { |
| 939 | nfsm_postop_attr(newvp, attrflag, 0); |
| 940 | nfsm_postop_attr(dvp, attrflag, 0); |
| 941 | } else |
| 942 | #endif |
| 943 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
| 944 | *vpp = newvp; |
| 945 | m_freem(mrep); |
| 946 | goto validate; |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | * The postop attr handling is duplicated for each if case, |
| 951 | * because it should be done while dvp is locked (unlocking |
| 952 | * dvp is different for each case). |
| 953 | */ |
| 954 | |
| 955 | if (NFS_CMPFH(np, fhp, fhsize)) { |
| 956 | /* |
| 957 | * As we handle "." lookup locally, this is |
| 958 | * a broken server. |
| 959 | */ |
| 960 | m_freem(mrep); |
| 961 | return EBADRPC; |
| 962 | } else if (flags & ISDOTDOT) { |
| 963 | /* |
| 964 | * ".." lookup |
| 965 | */ |
| 966 | VOP_UNLOCK(dvp); |
| 967 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 968 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
| 969 | if (error) { |
| 970 | m_freem(mrep); |
| 971 | return error; |
| 972 | } |
| 973 | newvp = NFSTOV(np); |
| 974 | |
| 975 | #ifndef NFS_V2_ONLY |
| 976 | if (v3) { |
| 977 | nfsm_postop_attr(newvp, attrflag, 0); |
| 978 | nfsm_postop_attr(dvp, attrflag, 0); |
| 979 | } else |
| 980 | #endif |
| 981 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
| 982 | } else { |
| 983 | /* |
| 984 | * Other lookups. |
| 985 | */ |
| 986 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 987 | if (error) { |
| 988 | m_freem(mrep); |
| 989 | return error; |
| 990 | } |
| 991 | newvp = NFSTOV(np); |
| 992 | #ifndef NFS_V2_ONLY |
| 993 | if (v3) { |
| 994 | nfsm_postop_attr(newvp, attrflag, 0); |
| 995 | nfsm_postop_attr(dvp, attrflag, 0); |
| 996 | } else |
| 997 | #endif |
| 998 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
| 999 | } |
| 1000 | if (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) { |
| 1001 | nfs_cache_enter(dvp, newvp, cnp); |
| 1002 | } |
| 1003 | *vpp = newvp; |
| 1004 | nfsm_reqdone; |
| 1005 | if (error) { |
| 1006 | /* |
| 1007 | * We get here only because of errors returned by |
| 1008 | * the RPC. Otherwise we'll have returned above |
| 1009 | * (the nfsm_* macros will jump to nfsm_reqdone |
| 1010 | * on error). |
| 1011 | */ |
| 1012 | if (error == ENOENT && cnp->cn_nameiop != CREATE) { |
| 1013 | nfs_cache_enter(dvp, NULL, cnp); |
| 1014 | } |
| 1015 | if (newvp != NULLVP) { |
| 1016 | if (newvp == dvp) { |
| 1017 | vrele(newvp); |
| 1018 | } else { |
| 1019 | vput(newvp); |
| 1020 | } |
| 1021 | } |
| 1022 | noentry: |
| 1023 | if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && |
| 1024 | (flags & ISLASTCN) && error == ENOENT) { |
| 1025 | if (dvp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1026 | error = EROFS; |
| 1027 | } else { |
| 1028 | error = EJUSTRETURN; |
| 1029 | } |
| 1030 | } |
| 1031 | *vpp = NULL; |
| 1032 | return error; |
| 1033 | } |
| 1034 | |
| 1035 | validate: |
| 1036 | /* |
| 1037 | * make sure we have valid type and size. |
| 1038 | */ |
| 1039 | |
| 1040 | newvp = *vpp; |
| 1041 | if (newvp->v_type == VNON) { |
| 1042 | struct vattr vattr; /* dummy */ |
| 1043 | |
| 1044 | KASSERT(VTONFS(newvp)->n_attrstamp == 0); |
| 1045 | error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred); |
| 1046 | if (error) { |
| 1047 | vput(newvp); |
| 1048 | *vpp = NULL; |
| 1049 | } |
| 1050 | } |
| 1051 | if (error) |
| 1052 | return error; |
| 1053 | if (newvp != dvp) |
| 1054 | VOP_UNLOCK(newvp); |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
| 1058 | /* |
| 1059 | * nfs read call. |
| 1060 | * Just call nfs_bioread() to do the work. |
| 1061 | */ |
| 1062 | int |
| 1063 | nfs_read(void *v) |
| 1064 | { |
| 1065 | struct vop_read_args /* { |
| 1066 | struct vnode *a_vp; |
| 1067 | struct uio *a_uio; |
| 1068 | int a_ioflag; |
| 1069 | kauth_cred_t a_cred; |
| 1070 | } */ *ap = v; |
| 1071 | struct vnode *vp = ap->a_vp; |
| 1072 | |
| 1073 | if (vp->v_type != VREG) |
| 1074 | return EISDIR; |
| 1075 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * nfs readlink call |
| 1080 | */ |
| 1081 | int |
| 1082 | nfs_readlink(void *v) |
| 1083 | { |
| 1084 | struct vop_readlink_args /* { |
| 1085 | struct vnode *a_vp; |
| 1086 | struct uio *a_uio; |
| 1087 | kauth_cred_t a_cred; |
| 1088 | } */ *ap = v; |
| 1089 | struct vnode *vp = ap->a_vp; |
| 1090 | struct nfsnode *np = VTONFS(vp); |
| 1091 | |
| 1092 | if (vp->v_type != VLNK) |
| 1093 | return (EPERM); |
| 1094 | |
| 1095 | if (np->n_rcred != NULL) { |
| 1096 | kauth_cred_free(np->n_rcred); |
| 1097 | } |
| 1098 | np->n_rcred = ap->a_cred; |
| 1099 | kauth_cred_hold(np->n_rcred); |
| 1100 | |
| 1101 | return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * Do a readlink rpc. |
| 1106 | * Called by nfs_doio() from below the buffer cache. |
| 1107 | */ |
| 1108 | int |
| 1109 | nfs_readlinkrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
| 1110 | { |
| 1111 | u_int32_t *tl; |
| 1112 | char *cp; |
| 1113 | int32_t t1, t2; |
| 1114 | char *bpos, *dpos, *cp2; |
| 1115 | int error = 0; |
| 1116 | uint32_t len; |
| 1117 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1118 | const int v3 = NFS_ISV3(vp); |
| 1119 | struct nfsnode *np = VTONFS(vp); |
| 1120 | #ifndef NFS_V2_ONLY |
| 1121 | int attrflag; |
| 1122 | #endif |
| 1123 | |
| 1124 | nfsstats.rpccnt[NFSPROC_READLINK]++; |
| 1125 | nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); |
| 1126 | nfsm_fhtom(np, v3); |
| 1127 | nfsm_request(np, NFSPROC_READLINK, curlwp, cred); |
| 1128 | #ifndef NFS_V2_ONLY |
| 1129 | if (v3) |
| 1130 | nfsm_postop_attr(vp, attrflag, 0); |
| 1131 | #endif |
| 1132 | if (!error) { |
| 1133 | #ifndef NFS_V2_ONLY |
| 1134 | if (v3) { |
| 1135 | nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); |
| 1136 | len = fxdr_unsigned(uint32_t, *tl); |
| 1137 | if (len > NFS_MAXPATHLEN) { |
| 1138 | /* |
| 1139 | * this pathname is too long for us. |
| 1140 | */ |
| 1141 | m_freem(mrep); |
| 1142 | /* Solaris returns EINVAL. should we follow? */ |
| 1143 | error = ENAMETOOLONG; |
| 1144 | goto nfsmout; |
| 1145 | } |
| 1146 | } else |
| 1147 | #endif |
| 1148 | { |
| 1149 | nfsm_strsiz(len, NFS_MAXPATHLEN); |
| 1150 | } |
| 1151 | nfsm_mtouio(uiop, len); |
| 1152 | } |
| 1153 | nfsm_reqdone; |
| 1154 | return (error); |
| 1155 | } |
| 1156 | |
| 1157 | /* |
| 1158 | * nfs read rpc call |
| 1159 | * Ditto above |
| 1160 | */ |
| 1161 | int |
| 1162 | nfs_readrpc(struct vnode *vp, struct uio *uiop) |
| 1163 | { |
| 1164 | u_int32_t *tl; |
| 1165 | char *cp; |
| 1166 | int32_t t1, t2; |
| 1167 | char *bpos, *dpos, *cp2; |
| 1168 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1169 | struct nfsmount *nmp; |
| 1170 | int error = 0, len, retlen, tsiz, eof __unused, byte_count; |
| 1171 | const int v3 = NFS_ISV3(vp); |
| 1172 | struct nfsnode *np = VTONFS(vp); |
| 1173 | #ifndef NFS_V2_ONLY |
| 1174 | int attrflag; |
| 1175 | #endif |
| 1176 | |
| 1177 | #ifndef nolint |
| 1178 | eof = 0; |
| 1179 | #endif |
| 1180 | nmp = VFSTONFS(vp->v_mount); |
| 1181 | tsiz = uiop->uio_resid; |
| 1182 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1183 | return (EFBIG); |
| 1184 | iostat_busy(nmp->nm_stats); |
| 1185 | byte_count = 0; /* count bytes actually transferred */ |
| 1186 | while (tsiz > 0) { |
| 1187 | nfsstats.rpccnt[NFSPROC_READ]++; |
| 1188 | len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; |
| 1189 | nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); |
| 1190 | nfsm_fhtom(np, v3); |
| 1191 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); |
| 1192 | #ifndef NFS_V2_ONLY |
| 1193 | if (v3) { |
| 1194 | txdr_hyper(uiop->uio_offset, tl); |
| 1195 | *(tl + 2) = txdr_unsigned(len); |
| 1196 | } else |
| 1197 | #endif |
| 1198 | { |
| 1199 | *tl++ = txdr_unsigned(uiop->uio_offset); |
| 1200 | *tl++ = txdr_unsigned(len); |
| 1201 | *tl = 0; |
| 1202 | } |
| 1203 | nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); |
| 1204 | #ifndef NFS_V2_ONLY |
| 1205 | if (v3) { |
| 1206 | nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); |
| 1207 | if (error) { |
| 1208 | m_freem(mrep); |
| 1209 | goto nfsmout; |
| 1210 | } |
| 1211 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1212 | eof = fxdr_unsigned(int, *(tl + 1)); |
| 1213 | } else |
| 1214 | #endif |
| 1215 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
| 1216 | nfsm_strsiz(retlen, nmp->nm_rsize); |
| 1217 | nfsm_mtouio(uiop, retlen); |
| 1218 | m_freem(mrep); |
| 1219 | tsiz -= retlen; |
| 1220 | byte_count += retlen; |
| 1221 | #ifndef NFS_V2_ONLY |
| 1222 | if (v3) { |
| 1223 | if (eof || retlen == 0) |
| 1224 | tsiz = 0; |
| 1225 | } else |
| 1226 | #endif |
| 1227 | if (retlen < len) |
| 1228 | tsiz = 0; |
| 1229 | } |
| 1230 | nfsmout: |
| 1231 | iostat_unbusy(nmp->nm_stats, byte_count, 1); |
| 1232 | return (error); |
| 1233 | } |
| 1234 | |
| 1235 | struct nfs_writerpc_context { |
| 1236 | kmutex_t nwc_lock; |
| 1237 | kcondvar_t nwc_cv; |
| 1238 | int nwc_mbufcount; |
| 1239 | }; |
| 1240 | |
| 1241 | /* |
| 1242 | * free mbuf used to refer protected pages while write rpc call. |
| 1243 | * called at splvm. |
| 1244 | */ |
| 1245 | static void |
| 1246 | nfs_writerpc_extfree(struct mbuf *m, void *tbuf, size_t size, void *arg) |
| 1247 | { |
| 1248 | struct nfs_writerpc_context *ctx = arg; |
| 1249 | |
| 1250 | KASSERT(m != NULL); |
| 1251 | KASSERT(ctx != NULL); |
| 1252 | pool_cache_put(mb_cache, m); |
| 1253 | mutex_enter(&ctx->nwc_lock); |
| 1254 | if (--ctx->nwc_mbufcount == 0) { |
| 1255 | cv_signal(&ctx->nwc_cv); |
| 1256 | } |
| 1257 | mutex_exit(&ctx->nwc_lock); |
| 1258 | } |
| 1259 | |
| 1260 | /* |
| 1261 | * nfs write call |
| 1262 | */ |
| 1263 | int |
| 1264 | nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, bool pageprotected, bool *stalewriteverfp) |
| 1265 | { |
| 1266 | u_int32_t *tl; |
| 1267 | char *cp; |
| 1268 | int32_t t1, t2; |
| 1269 | char *bpos, *dpos; |
| 1270 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1271 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 1272 | int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; |
| 1273 | const int v3 = NFS_ISV3(vp); |
| 1274 | int committed = NFSV3WRITE_FILESYNC; |
| 1275 | struct nfsnode *np = VTONFS(vp); |
| 1276 | struct nfs_writerpc_context ctx; |
| 1277 | int byte_count; |
| 1278 | size_t origresid; |
| 1279 | #ifndef NFS_V2_ONLY |
| 1280 | char *cp2; |
| 1281 | int rlen, commit; |
| 1282 | #endif |
| 1283 | |
| 1284 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1285 | panic("writerpc readonly vp %p" , vp); |
| 1286 | } |
| 1287 | |
| 1288 | #ifdef DIAGNOSTIC |
| 1289 | if (uiop->uio_iovcnt != 1) |
| 1290 | panic("nfs: writerpc iovcnt > 1" ); |
| 1291 | #endif |
| 1292 | tsiz = uiop->uio_resid; |
| 1293 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1294 | return EFBIG; |
| 1295 | |
| 1296 | mutex_init(&ctx.nwc_lock, MUTEX_DRIVER, IPL_VM); |
| 1297 | cv_init(&ctx.nwc_cv, "nfsmblk" ); |
| 1298 | ctx.nwc_mbufcount = 1; |
| 1299 | |
| 1300 | retry: |
| 1301 | origresid = uiop->uio_resid; |
| 1302 | KASSERT(origresid == uiop->uio_iov->iov_len); |
| 1303 | iostat_busy(nmp->nm_stats); |
| 1304 | byte_count = 0; /* count of bytes actually written */ |
| 1305 | while (tsiz > 0) { |
| 1306 | uint32_t datalen; /* data bytes need to be allocated in mbuf */ |
| 1307 | size_t backup; |
| 1308 | bool stalewriteverf = false; |
| 1309 | |
| 1310 | nfsstats.rpccnt[NFSPROC_WRITE]++; |
| 1311 | len = min(tsiz, nmp->nm_wsize); |
| 1312 | datalen = pageprotected ? 0 : nfsm_rndup(len); |
| 1313 | nfsm_reqhead(np, NFSPROC_WRITE, |
| 1314 | NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); |
| 1315 | nfsm_fhtom(np, v3); |
| 1316 | #ifndef NFS_V2_ONLY |
| 1317 | if (v3) { |
| 1318 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 1319 | txdr_hyper(uiop->uio_offset, tl); |
| 1320 | tl += 2; |
| 1321 | *tl++ = txdr_unsigned(len); |
| 1322 | *tl++ = txdr_unsigned(*iomode); |
| 1323 | *tl = txdr_unsigned(len); |
| 1324 | } else |
| 1325 | #endif |
| 1326 | { |
| 1327 | u_int32_t x; |
| 1328 | |
| 1329 | nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); |
| 1330 | /* Set both "begin" and "current" to non-garbage. */ |
| 1331 | x = txdr_unsigned((u_int32_t)uiop->uio_offset); |
| 1332 | *tl++ = x; /* "begin offset" */ |
| 1333 | *tl++ = x; /* "current offset" */ |
| 1334 | x = txdr_unsigned(len); |
| 1335 | *tl++ = x; /* total to this offset */ |
| 1336 | *tl = x; /* size of this write */ |
| 1337 | |
| 1338 | } |
| 1339 | if (pageprotected) { |
| 1340 | /* |
| 1341 | * since we know pages can't be modified during i/o, |
| 1342 | * no need to copy them for us. |
| 1343 | */ |
| 1344 | struct mbuf *m; |
| 1345 | struct iovec *iovp = uiop->uio_iov; |
| 1346 | |
| 1347 | m = m_get(M_WAIT, MT_DATA); |
| 1348 | MCLAIM(m, &nfs_mowner); |
| 1349 | MEXTADD(m, iovp->iov_base, len, M_MBUF, |
| 1350 | nfs_writerpc_extfree, &ctx); |
| 1351 | m->m_flags |= M_EXT_ROMAP; |
| 1352 | m->m_len = len; |
| 1353 | mb->m_next = m; |
| 1354 | /* |
| 1355 | * no need to maintain mb and bpos here |
| 1356 | * because no one care them later. |
| 1357 | */ |
| 1358 | #if 0 |
| 1359 | mb = m; |
| 1360 | bpos = mtod(void *, mb) + mb->m_len; |
| 1361 | #endif |
| 1362 | UIO_ADVANCE(uiop, len); |
| 1363 | uiop->uio_offset += len; |
| 1364 | mutex_enter(&ctx.nwc_lock); |
| 1365 | ctx.nwc_mbufcount++; |
| 1366 | mutex_exit(&ctx.nwc_lock); |
| 1367 | nfs_zeropad(mb, 0, nfsm_padlen(len)); |
| 1368 | } else { |
| 1369 | nfsm_uiotom(uiop, len); |
| 1370 | } |
| 1371 | nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); |
| 1372 | #ifndef NFS_V2_ONLY |
| 1373 | if (v3) { |
| 1374 | wccflag = NFSV3_WCCCHK; |
| 1375 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); |
| 1376 | if (!error) { |
| 1377 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED |
| 1378 | + NFSX_V3WRITEVERF); |
| 1379 | rlen = fxdr_unsigned(int, *tl++); |
| 1380 | if (rlen == 0) { |
| 1381 | error = NFSERR_IO; |
| 1382 | m_freem(mrep); |
| 1383 | break; |
| 1384 | } else if (rlen < len) { |
| 1385 | backup = len - rlen; |
| 1386 | UIO_ADVANCE(uiop, -backup); |
| 1387 | uiop->uio_offset -= backup; |
| 1388 | len = rlen; |
| 1389 | } |
| 1390 | commit = fxdr_unsigned(int, *tl++); |
| 1391 | |
| 1392 | /* |
| 1393 | * Return the lowest committment level |
| 1394 | * obtained by any of the RPCs. |
| 1395 | */ |
| 1396 | if (committed == NFSV3WRITE_FILESYNC) |
| 1397 | committed = commit; |
| 1398 | else if (committed == NFSV3WRITE_DATASYNC && |
| 1399 | commit == NFSV3WRITE_UNSTABLE) |
| 1400 | committed = commit; |
| 1401 | mutex_enter(&nmp->nm_lock); |
| 1402 | if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ |
| 1403 | memcpy(nmp->nm_writeverf, tl, |
| 1404 | NFSX_V3WRITEVERF); |
| 1405 | nmp->nm_iflag |= NFSMNT_HASWRITEVERF; |
| 1406 | } else if ((nmp->nm_iflag & |
| 1407 | NFSMNT_STALEWRITEVERF) || |
| 1408 | memcmp(tl, nmp->nm_writeverf, |
| 1409 | NFSX_V3WRITEVERF)) { |
| 1410 | memcpy(nmp->nm_writeverf, tl, |
| 1411 | NFSX_V3WRITEVERF); |
| 1412 | /* |
| 1413 | * note NFSMNT_STALEWRITEVERF |
| 1414 | * if we're the first thread to |
| 1415 | * notice it. |
| 1416 | */ |
| 1417 | if ((nmp->nm_iflag & |
| 1418 | NFSMNT_STALEWRITEVERF) == 0) { |
| 1419 | stalewriteverf = true; |
| 1420 | nmp->nm_iflag |= |
| 1421 | NFSMNT_STALEWRITEVERF; |
| 1422 | } |
| 1423 | } |
| 1424 | mutex_exit(&nmp->nm_lock); |
| 1425 | } |
| 1426 | } else |
| 1427 | #endif |
| 1428 | nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); |
| 1429 | if (wccflag) |
| 1430 | VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; |
| 1431 | m_freem(mrep); |
| 1432 | if (error) |
| 1433 | break; |
| 1434 | tsiz -= len; |
| 1435 | byte_count += len; |
| 1436 | if (stalewriteverf) { |
| 1437 | *stalewriteverfp = true; |
| 1438 | stalewriteverf = false; |
| 1439 | if (committed == NFSV3WRITE_UNSTABLE && |
| 1440 | len != origresid) { |
| 1441 | /* |
| 1442 | * if our write requests weren't atomic but |
| 1443 | * unstable, datas in previous iterations |
| 1444 | * might have already been lost now. |
| 1445 | * then, we should resend them to nfsd. |
| 1446 | */ |
| 1447 | backup = origresid - tsiz; |
| 1448 | UIO_ADVANCE(uiop, -backup); |
| 1449 | uiop->uio_offset -= backup; |
| 1450 | tsiz = origresid; |
| 1451 | goto retry; |
| 1452 | } |
| 1453 | } |
| 1454 | } |
| 1455 | nfsmout: |
| 1456 | iostat_unbusy(nmp->nm_stats, byte_count, 0); |
| 1457 | if (pageprotected) { |
| 1458 | /* |
| 1459 | * wait until mbufs go away. |
| 1460 | * retransmitted mbufs can survive longer than rpc requests |
| 1461 | * themselves. |
| 1462 | */ |
| 1463 | mutex_enter(&ctx.nwc_lock); |
| 1464 | ctx.nwc_mbufcount--; |
| 1465 | while (ctx.nwc_mbufcount > 0) { |
| 1466 | cv_wait(&ctx.nwc_cv, &ctx.nwc_lock); |
| 1467 | } |
| 1468 | mutex_exit(&ctx.nwc_lock); |
| 1469 | } |
| 1470 | mutex_destroy(&ctx.nwc_lock); |
| 1471 | cv_destroy(&ctx.nwc_cv); |
| 1472 | *iomode = committed; |
| 1473 | if (error) |
| 1474 | uiop->uio_resid = tsiz; |
| 1475 | return (error); |
| 1476 | } |
| 1477 | |
| 1478 | /* |
| 1479 | * nfs mknod rpc |
| 1480 | * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the |
| 1481 | * mode set to specify the file type and the size field for rdev. |
| 1482 | */ |
| 1483 | int |
| 1484 | nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct vattr *vap) |
| 1485 | { |
| 1486 | struct nfsv2_sattr *sp; |
| 1487 | u_int32_t *tl; |
| 1488 | char *cp; |
| 1489 | int32_t t1, t2; |
| 1490 | struct vnode *newvp = (struct vnode *)0; |
| 1491 | struct nfsnode *dnp, *np; |
| 1492 | char *cp2; |
| 1493 | char *bpos, *dpos; |
| 1494 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
| 1495 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1496 | u_int32_t rdev; |
| 1497 | const int v3 = NFS_ISV3(dvp); |
| 1498 | |
| 1499 | if (vap->va_type == VCHR || vap->va_type == VBLK) |
| 1500 | rdev = txdr_unsigned(vap->va_rdev); |
| 1501 | else if (vap->va_type == VFIFO || vap->va_type == VSOCK) |
| 1502 | rdev = nfs_xdrneg1; |
| 1503 | else { |
| 1504 | VOP_ABORTOP(dvp, cnp); |
| 1505 | return (EOPNOTSUPP); |
| 1506 | } |
| 1507 | nfsstats.rpccnt[NFSPROC_MKNOD]++; |
| 1508 | dnp = VTONFS(dvp); |
| 1509 | nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + |
| 1510 | + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1511 | nfsm_fhtom(dnp, v3); |
| 1512 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1513 | #ifndef NFS_V2_ONLY |
| 1514 | if (v3) { |
| 1515 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1516 | *tl++ = vtonfsv3_type(vap->va_type); |
| 1517 | nfsm_v3attrbuild(vap, false); |
| 1518 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
| 1519 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1520 | *tl++ = txdr_unsigned(major(vap->va_rdev)); |
| 1521 | *tl = txdr_unsigned(minor(vap->va_rdev)); |
| 1522 | } |
| 1523 | } else |
| 1524 | #endif |
| 1525 | { |
| 1526 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1527 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1528 | sp->sa_uid = nfs_xdrneg1; |
| 1529 | sp->sa_gid = nfs_xdrneg1; |
| 1530 | sp->sa_size = rdev; |
| 1531 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1532 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1533 | } |
| 1534 | nfsm_request(dnp, NFSPROC_MKNOD, curlwp, cnp->cn_cred); |
| 1535 | if (!error) { |
| 1536 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1537 | if (!gotvp) { |
| 1538 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1539 | cnp->cn_namelen, cnp->cn_cred, curlwp, &np); |
| 1540 | if (!error) |
| 1541 | newvp = NFSTOV(np); |
| 1542 | } |
| 1543 | } |
| 1544 | #ifndef NFS_V2_ONLY |
| 1545 | if (v3) |
| 1546 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 1547 | #endif |
| 1548 | nfsm_reqdone; |
| 1549 | if (error) { |
| 1550 | if (newvp) |
| 1551 | vput(newvp); |
| 1552 | } else { |
| 1553 | nfs_cache_enter(dvp, newvp, cnp); |
| 1554 | *vpp = newvp; |
| 1555 | VOP_UNLOCK(newvp); |
| 1556 | } |
| 1557 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1558 | if (!wccflag) |
| 1559 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 1560 | return (error); |
| 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * nfs mknod vop |
| 1565 | * just call nfs_mknodrpc() to do the work. |
| 1566 | */ |
| 1567 | /* ARGSUSED */ |
| 1568 | int |
| 1569 | nfs_mknod(void *v) |
| 1570 | { |
| 1571 | struct vop_mknod_v3_args /* { |
| 1572 | struct vnode *a_dvp; |
| 1573 | struct vnode **a_vpp; |
| 1574 | struct componentname *a_cnp; |
| 1575 | struct vattr *a_vap; |
| 1576 | } */ *ap = v; |
| 1577 | struct vnode *dvp = ap->a_dvp; |
| 1578 | struct componentname *cnp = ap->a_cnp; |
| 1579 | int error; |
| 1580 | |
| 1581 | error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); |
| 1582 | VN_KNOTE(dvp, NOTE_WRITE); |
| 1583 | if (error == 0 || error == EEXIST) |
| 1584 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
| 1585 | return (error); |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * nfs file create call |
| 1590 | */ |
| 1591 | int |
| 1592 | nfs_create(void *v) |
| 1593 | { |
| 1594 | struct vop_create_v3_args /* { |
| 1595 | struct vnode *a_dvp; |
| 1596 | struct vnode **a_vpp; |
| 1597 | struct componentname *a_cnp; |
| 1598 | struct vattr *a_vap; |
| 1599 | } */ *ap = v; |
| 1600 | struct vnode *dvp = ap->a_dvp; |
| 1601 | struct vattr *vap = ap->a_vap; |
| 1602 | struct componentname *cnp = ap->a_cnp; |
| 1603 | struct nfsv2_sattr *sp; |
| 1604 | u_int32_t *tl; |
| 1605 | char *cp; |
| 1606 | int32_t t1, t2; |
| 1607 | struct nfsnode *dnp, *np = (struct nfsnode *)0; |
| 1608 | struct vnode *newvp = (struct vnode *)0; |
| 1609 | char *bpos, *dpos, *cp2; |
| 1610 | int error, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
| 1611 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1612 | const int v3 = NFS_ISV3(dvp); |
| 1613 | u_int32_t excl_mode = NFSV3CREATE_UNCHECKED; |
| 1614 | |
| 1615 | /* |
| 1616 | * Oops, not for me.. |
| 1617 | */ |
| 1618 | if (vap->va_type == VSOCK) |
| 1619 | return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); |
| 1620 | |
| 1621 | KASSERT(vap->va_type == VREG); |
| 1622 | |
| 1623 | #ifdef VA_EXCLUSIVE |
| 1624 | if (vap->va_vaflags & VA_EXCLUSIVE) { |
| 1625 | excl_mode = NFSV3CREATE_EXCLUSIVE; |
| 1626 | } |
| 1627 | #endif |
| 1628 | again: |
| 1629 | error = 0; |
| 1630 | nfsstats.rpccnt[NFSPROC_CREATE]++; |
| 1631 | dnp = VTONFS(dvp); |
| 1632 | nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + |
| 1633 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1634 | nfsm_fhtom(dnp, v3); |
| 1635 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1636 | #ifndef NFS_V2_ONLY |
| 1637 | if (v3) { |
| 1638 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1639 | if (excl_mode == NFSV3CREATE_EXCLUSIVE) { |
| 1640 | *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); |
| 1641 | nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); |
| 1642 | *tl++ = cprng_fast32(); |
| 1643 | *tl = cprng_fast32(); |
| 1644 | } else { |
| 1645 | *tl = txdr_unsigned(excl_mode); |
| 1646 | nfsm_v3attrbuild(vap, false); |
| 1647 | } |
| 1648 | } else |
| 1649 | #endif |
| 1650 | { |
| 1651 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1652 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1653 | sp->sa_uid = nfs_xdrneg1; |
| 1654 | sp->sa_gid = nfs_xdrneg1; |
| 1655 | sp->sa_size = 0; |
| 1656 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1657 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1658 | } |
| 1659 | nfsm_request(dnp, NFSPROC_CREATE, curlwp, cnp->cn_cred); |
| 1660 | if (!error) { |
| 1661 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1662 | if (!gotvp) { |
| 1663 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1664 | cnp->cn_namelen, cnp->cn_cred, curlwp, &np); |
| 1665 | if (!error) |
| 1666 | newvp = NFSTOV(np); |
| 1667 | } |
| 1668 | } |
| 1669 | #ifndef NFS_V2_ONLY |
| 1670 | if (v3) |
| 1671 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 1672 | #endif |
| 1673 | nfsm_reqdone; |
| 1674 | if (error) { |
| 1675 | /* |
| 1676 | * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. |
| 1677 | */ |
| 1678 | if (v3 && error == ENOTSUP) { |
| 1679 | if (excl_mode == NFSV3CREATE_EXCLUSIVE) { |
| 1680 | excl_mode = NFSV3CREATE_GUARDED; |
| 1681 | goto again; |
| 1682 | } else if (excl_mode == NFSV3CREATE_GUARDED) { |
| 1683 | excl_mode = NFSV3CREATE_UNCHECKED; |
| 1684 | goto again; |
| 1685 | } |
| 1686 | } |
| 1687 | } else if (v3 && (excl_mode == NFSV3CREATE_EXCLUSIVE)) { |
| 1688 | struct timespec ts; |
| 1689 | |
| 1690 | getnanotime(&ts); |
| 1691 | |
| 1692 | /* |
| 1693 | * make sure that we'll update timestamps as |
| 1694 | * most server implementations use them to store |
| 1695 | * the create verifier. |
| 1696 | * |
| 1697 | * XXX it's better to use TOSERVER always. |
| 1698 | */ |
| 1699 | |
| 1700 | if (vap->va_atime.tv_sec == VNOVAL) |
| 1701 | vap->va_atime = ts; |
| 1702 | if (vap->va_mtime.tv_sec == VNOVAL) |
| 1703 | vap->va_mtime = ts; |
| 1704 | |
| 1705 | error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, curlwp); |
| 1706 | } |
| 1707 | if (error == 0) { |
| 1708 | if (cnp->cn_flags & MAKEENTRY) |
| 1709 | nfs_cache_enter(dvp, newvp, cnp); |
| 1710 | else |
| 1711 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
| 1712 | *ap->a_vpp = newvp; |
| 1713 | VOP_UNLOCK(newvp); |
| 1714 | } else { |
| 1715 | if (newvp) |
| 1716 | vput(newvp); |
| 1717 | if (error == EEXIST) |
| 1718 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
| 1719 | } |
| 1720 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1721 | if (!wccflag) |
| 1722 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 1723 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 1724 | return (error); |
| 1725 | } |
| 1726 | |
| 1727 | /* |
| 1728 | * nfs file remove call |
| 1729 | * To try and make nfs semantics closer to ufs semantics, a file that has |
| 1730 | * other processes using the vnode is renamed instead of removed and then |
| 1731 | * removed later on the last close. |
| 1732 | * - If v_usecount > 1 |
| 1733 | * If a rename is not already in the works |
| 1734 | * call nfs_sillyrename() to set it up |
| 1735 | * else |
| 1736 | * do the remove rpc |
| 1737 | */ |
| 1738 | int |
| 1739 | nfs_remove(void *v) |
| 1740 | { |
| 1741 | struct vop_remove_args /* { |
| 1742 | struct vnodeop_desc *a_desc; |
| 1743 | struct vnode * a_dvp; |
| 1744 | struct vnode * a_vp; |
| 1745 | struct componentname * a_cnp; |
| 1746 | } */ *ap = v; |
| 1747 | struct vnode *vp = ap->a_vp; |
| 1748 | struct vnode *dvp = ap->a_dvp; |
| 1749 | struct componentname *cnp = ap->a_cnp; |
| 1750 | struct nfsnode *np = VTONFS(vp); |
| 1751 | int error = 0; |
| 1752 | struct vattr vattr; |
| 1753 | |
| 1754 | #ifndef DIAGNOSTIC |
| 1755 | if (vp->v_usecount < 1) |
| 1756 | panic("nfs_remove: bad v_usecount" ); |
| 1757 | #endif |
| 1758 | if (vp->v_type == VDIR) |
| 1759 | error = EPERM; |
| 1760 | else if (vp->v_usecount == 1 || (np->n_sillyrename && |
| 1761 | VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && |
| 1762 | vattr.va_nlink > 1)) { |
| 1763 | /* |
| 1764 | * Purge the name cache so that the chance of a lookup for |
| 1765 | * the name succeeding while the remove is in progress is |
| 1766 | * minimized. Without node locking it can still happen, such |
| 1767 | * that an I/O op returns ESTALE, but since you get this if |
| 1768 | * another host removes the file.. |
| 1769 | */ |
| 1770 | cache_purge(vp); |
| 1771 | /* |
| 1772 | * throw away biocache buffers, mainly to avoid |
| 1773 | * unnecessary delayed writes later. |
| 1774 | */ |
| 1775 | error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, curlwp, 1); |
| 1776 | /* Do the rpc */ |
| 1777 | if (error != EINTR) |
| 1778 | error = nfs_removerpc(dvp, cnp->cn_nameptr, |
| 1779 | cnp->cn_namelen, cnp->cn_cred, curlwp); |
| 1780 | } else if (!np->n_sillyrename) |
| 1781 | error = nfs_sillyrename(dvp, vp, cnp, false); |
| 1782 | if (!error && nfs_getattrcache(vp, &vattr) == 0 && |
| 1783 | vattr.va_nlink == 1) { |
| 1784 | np->n_flag |= NREMOVED; |
| 1785 | } |
| 1786 | NFS_INVALIDATE_ATTRCACHE(np); |
| 1787 | VN_KNOTE(vp, NOTE_DELETE); |
| 1788 | VN_KNOTE(dvp, NOTE_WRITE); |
| 1789 | if (dvp == vp) |
| 1790 | vrele(vp); |
| 1791 | else |
| 1792 | vput(vp); |
| 1793 | vput(dvp); |
| 1794 | return (error); |
| 1795 | } |
| 1796 | |
| 1797 | /* |
| 1798 | * nfs file remove rpc called from nfs_inactive |
| 1799 | */ |
| 1800 | int |
| 1801 | nfs_removeit(struct sillyrename *sp) |
| 1802 | { |
| 1803 | |
| 1804 | return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 1805 | (struct lwp *)0)); |
| 1806 | } |
| 1807 | |
| 1808 | /* |
| 1809 | * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). |
| 1810 | */ |
| 1811 | int |
| 1812 | nfs_removerpc(struct vnode *dvp, const char *name, int namelen, kauth_cred_t cred, struct lwp *l) |
| 1813 | { |
| 1814 | u_int32_t *tl; |
| 1815 | char *cp; |
| 1816 | #ifndef NFS_V2_ONLY |
| 1817 | int32_t t1; |
| 1818 | char *cp2; |
| 1819 | #endif |
| 1820 | int32_t t2; |
| 1821 | char *bpos, *dpos; |
| 1822 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 1823 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1824 | const int v3 = NFS_ISV3(dvp); |
| 1825 | int rexmit = 0; |
| 1826 | struct nfsnode *dnp = VTONFS(dvp); |
| 1827 | |
| 1828 | nfsstats.rpccnt[NFSPROC_REMOVE]++; |
| 1829 | nfsm_reqhead(dnp, NFSPROC_REMOVE, |
| 1830 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
| 1831 | nfsm_fhtom(dnp, v3); |
| 1832 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
| 1833 | nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); |
| 1834 | #ifndef NFS_V2_ONLY |
| 1835 | if (v3) |
| 1836 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 1837 | #endif |
| 1838 | nfsm_reqdone; |
| 1839 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1840 | if (!wccflag) |
| 1841 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 1842 | /* |
| 1843 | * Kludge City: If the first reply to the remove rpc is lost.. |
| 1844 | * the reply to the retransmitted request will be ENOENT |
| 1845 | * since the file was in fact removed |
| 1846 | * Therefore, we cheat and return success. |
| 1847 | */ |
| 1848 | if (rexmit && error == ENOENT) |
| 1849 | error = 0; |
| 1850 | return (error); |
| 1851 | } |
| 1852 | |
| 1853 | /* |
| 1854 | * nfs file rename call |
| 1855 | */ |
| 1856 | int |
| 1857 | nfs_rename(void *v) |
| 1858 | { |
| 1859 | struct vop_rename_args /* { |
| 1860 | struct vnode *a_fdvp; |
| 1861 | struct vnode *a_fvp; |
| 1862 | struct componentname *a_fcnp; |
| 1863 | struct vnode *a_tdvp; |
| 1864 | struct vnode *a_tvp; |
| 1865 | struct componentname *a_tcnp; |
| 1866 | } */ *ap = v; |
| 1867 | struct vnode *fvp = ap->a_fvp; |
| 1868 | struct vnode *tvp = ap->a_tvp; |
| 1869 | struct vnode *fdvp = ap->a_fdvp; |
| 1870 | struct vnode *tdvp = ap->a_tdvp; |
| 1871 | struct componentname *tcnp = ap->a_tcnp; |
| 1872 | struct componentname *fcnp = ap->a_fcnp; |
| 1873 | int error; |
| 1874 | |
| 1875 | /* Check for cross-device rename */ |
| 1876 | if ((fvp->v_mount != tdvp->v_mount) || |
| 1877 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
| 1878 | error = EXDEV; |
| 1879 | goto out; |
| 1880 | } |
| 1881 | |
| 1882 | /* |
| 1883 | * If the tvp exists and is in use, sillyrename it before doing the |
| 1884 | * rename of the new file over it. |
| 1885 | * |
| 1886 | * Have sillyrename use link instead of rename if possible, |
| 1887 | * so that we don't lose the file if the rename fails, and so |
| 1888 | * that there's no window when the "to" file doesn't exist. |
| 1889 | */ |
| 1890 | if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && |
| 1891 | tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, true)) { |
| 1892 | VN_KNOTE(tvp, NOTE_DELETE); |
| 1893 | vput(tvp); |
| 1894 | tvp = NULL; |
| 1895 | } |
| 1896 | |
| 1897 | error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
| 1898 | tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, |
| 1899 | curlwp); |
| 1900 | |
| 1901 | VN_KNOTE(fdvp, NOTE_WRITE); |
| 1902 | VN_KNOTE(tdvp, NOTE_WRITE); |
| 1903 | if (error == 0 || error == EEXIST) { |
| 1904 | if (fvp->v_type == VDIR) |
| 1905 | cache_purge(fvp); |
| 1906 | else |
| 1907 | cache_purge1(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
| 1908 | 0); |
| 1909 | if (tvp != NULL && tvp->v_type == VDIR) |
| 1910 | cache_purge(tvp); |
| 1911 | else |
| 1912 | cache_purge1(tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, |
| 1913 | 0); |
| 1914 | } |
| 1915 | out: |
| 1916 | if (tdvp == tvp) |
| 1917 | vrele(tdvp); |
| 1918 | else |
| 1919 | vput(tdvp); |
| 1920 | if (tvp) |
| 1921 | vput(tvp); |
| 1922 | vrele(fdvp); |
| 1923 | vrele(fvp); |
| 1924 | return (error); |
| 1925 | } |
| 1926 | |
| 1927 | /* |
| 1928 | * nfs file rename rpc called from nfs_remove() above |
| 1929 | */ |
| 1930 | int |
| 1931 | nfs_renameit(struct vnode *sdvp, struct componentname *scnp, struct sillyrename *sp) |
| 1932 | { |
| 1933 | return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, |
| 1934 | sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, curlwp)); |
| 1935 | } |
| 1936 | |
| 1937 | /* |
| 1938 | * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). |
| 1939 | */ |
| 1940 | int |
| 1941 | nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, struct vnode *tdvp, const char *tnameptr, int tnamelen, kauth_cred_t cred, struct lwp *l) |
| 1942 | { |
| 1943 | u_int32_t *tl; |
| 1944 | char *cp; |
| 1945 | #ifndef NFS_V2_ONLY |
| 1946 | int32_t t1; |
| 1947 | char *cp2; |
| 1948 | #endif |
| 1949 | int32_t t2; |
| 1950 | char *bpos, *dpos; |
| 1951 | int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; |
| 1952 | struct mbuf *mreq, *mrep, *md, *mb; |
| 1953 | const int v3 = NFS_ISV3(fdvp); |
| 1954 | int rexmit = 0; |
| 1955 | struct nfsnode *fdnp = VTONFS(fdvp); |
| 1956 | |
| 1957 | nfsstats.rpccnt[NFSPROC_RENAME]++; |
| 1958 | nfsm_reqhead(fdnp, NFSPROC_RENAME, |
| 1959 | (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + |
| 1960 | nfsm_rndup(tnamelen)); |
| 1961 | nfsm_fhtom(fdnp, v3); |
| 1962 | nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); |
| 1963 | nfsm_fhtom(VTONFS(tdvp), v3); |
| 1964 | nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); |
| 1965 | nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); |
| 1966 | #ifndef NFS_V2_ONLY |
| 1967 | if (v3) { |
| 1968 | nfsm_wcc_data(fdvp, fwccflag, 0, !error); |
| 1969 | nfsm_wcc_data(tdvp, twccflag, 0, !error); |
| 1970 | } |
| 1971 | #endif |
| 1972 | nfsm_reqdone; |
| 1973 | VTONFS(fdvp)->n_flag |= NMODIFIED; |
| 1974 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
| 1975 | if (!fwccflag) |
| 1976 | NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); |
| 1977 | if (!twccflag) |
| 1978 | NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); |
| 1979 | /* |
| 1980 | * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. |
| 1981 | */ |
| 1982 | if (rexmit && error == ENOENT) |
| 1983 | error = 0; |
| 1984 | return (error); |
| 1985 | } |
| 1986 | |
| 1987 | /* |
| 1988 | * NFS link RPC, called from nfs_link. |
| 1989 | * Assumes dvp and vp locked, and leaves them that way. |
| 1990 | */ |
| 1991 | |
| 1992 | static int |
| 1993 | nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, |
| 1994 | size_t namelen, kauth_cred_t cred, struct lwp *l) |
| 1995 | { |
| 1996 | u_int32_t *tl; |
| 1997 | char *cp; |
| 1998 | #ifndef NFS_V2_ONLY |
| 1999 | int32_t t1; |
| 2000 | char *cp2; |
| 2001 | #endif |
| 2002 | int32_t t2; |
| 2003 | char *bpos, *dpos; |
| 2004 | int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; |
| 2005 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2006 | const int v3 = NFS_ISV3(dvp); |
| 2007 | int rexmit = 0; |
| 2008 | struct nfsnode *np = VTONFS(vp); |
| 2009 | |
| 2010 | nfsstats.rpccnt[NFSPROC_LINK]++; |
| 2011 | nfsm_reqhead(np, NFSPROC_LINK, |
| 2012 | NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
| 2013 | nfsm_fhtom(np, v3); |
| 2014 | nfsm_fhtom(VTONFS(dvp), v3); |
| 2015 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
| 2016 | nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); |
| 2017 | #ifndef NFS_V2_ONLY |
| 2018 | if (v3) { |
| 2019 | nfsm_postop_attr(vp, attrflag, 0); |
| 2020 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 2021 | } |
| 2022 | #endif |
| 2023 | nfsm_reqdone; |
| 2024 | |
| 2025 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2026 | if (!attrflag) |
| 2027 | NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); |
| 2028 | if (!wccflag) |
| 2029 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 2030 | |
| 2031 | /* |
| 2032 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
| 2033 | */ |
| 2034 | if (rexmit && error == EEXIST) |
| 2035 | error = 0; |
| 2036 | |
| 2037 | return error; |
| 2038 | } |
| 2039 | |
| 2040 | /* |
| 2041 | * nfs hard link create call |
| 2042 | */ |
| 2043 | int |
| 2044 | nfs_link(void *v) |
| 2045 | { |
| 2046 | struct vop_link_v2_args /* { |
| 2047 | struct vnode *a_dvp; |
| 2048 | struct vnode *a_vp; |
| 2049 | struct componentname *a_cnp; |
| 2050 | } */ *ap = v; |
| 2051 | struct vnode *vp = ap->a_vp; |
| 2052 | struct vnode *dvp = ap->a_dvp; |
| 2053 | struct componentname *cnp = ap->a_cnp; |
| 2054 | int error = 0; |
| 2055 | |
| 2056 | error = vn_lock(vp, LK_EXCLUSIVE); |
| 2057 | if (error != 0) { |
| 2058 | VOP_ABORTOP(dvp, cnp); |
| 2059 | return error; |
| 2060 | } |
| 2061 | |
| 2062 | /* |
| 2063 | * Push all writes to the server, so that the attribute cache |
| 2064 | * doesn't get "out of sync" with the server. |
| 2065 | * XXX There should be a better way! |
| 2066 | */ |
| 2067 | VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0); |
| 2068 | |
| 2069 | error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, |
| 2070 | cnp->cn_cred, curlwp); |
| 2071 | |
| 2072 | if (error == 0) { |
| 2073 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
| 2074 | } |
| 2075 | VOP_UNLOCK(vp); |
| 2076 | VN_KNOTE(vp, NOTE_LINK); |
| 2077 | VN_KNOTE(dvp, NOTE_WRITE); |
| 2078 | return (error); |
| 2079 | } |
| 2080 | |
| 2081 | /* |
| 2082 | * nfs symbolic link create call |
| 2083 | */ |
| 2084 | int |
| 2085 | nfs_symlink(void *v) |
| 2086 | { |
| 2087 | struct vop_symlink_v3_args /* { |
| 2088 | struct vnode *a_dvp; |
| 2089 | struct vnode **a_vpp; |
| 2090 | struct componentname *a_cnp; |
| 2091 | struct vattr *a_vap; |
| 2092 | char *a_target; |
| 2093 | } */ *ap = v; |
| 2094 | struct vnode *dvp = ap->a_dvp; |
| 2095 | struct vattr *vap = ap->a_vap; |
| 2096 | struct componentname *cnp = ap->a_cnp; |
| 2097 | struct nfsv2_sattr *sp; |
| 2098 | u_int32_t *tl; |
| 2099 | char *cp; |
| 2100 | int32_t t1, t2; |
| 2101 | char *bpos, *dpos, *cp2; |
| 2102 | int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; |
| 2103 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2104 | struct vnode *newvp = (struct vnode *)0; |
| 2105 | const int v3 = NFS_ISV3(dvp); |
| 2106 | int rexmit = 0; |
| 2107 | struct nfsnode *dnp = VTONFS(dvp); |
| 2108 | |
| 2109 | *ap->a_vpp = NULL; |
| 2110 | nfsstats.rpccnt[NFSPROC_SYMLINK]++; |
| 2111 | slen = strlen(ap->a_target); |
| 2112 | nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + |
| 2113 | nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); |
| 2114 | nfsm_fhtom(dnp, v3); |
| 2115 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 2116 | #ifndef NFS_V2_ONlY |
| 2117 | if (v3) |
| 2118 | nfsm_v3attrbuild(vap, false); |
| 2119 | #endif |
| 2120 | nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); |
| 2121 | #ifndef NFS_V2_ONlY |
| 2122 | if (!v3) { |
| 2123 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 2124 | sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); |
| 2125 | sp->sa_uid = nfs_xdrneg1; |
| 2126 | sp->sa_gid = nfs_xdrneg1; |
| 2127 | sp->sa_size = nfs_xdrneg1; |
| 2128 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 2129 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 2130 | } |
| 2131 | #endif |
| 2132 | nfsm_request1(dnp, NFSPROC_SYMLINK, curlwp, cnp->cn_cred, |
| 2133 | &rexmit); |
| 2134 | #ifndef NFS_V2_ONlY |
| 2135 | if (v3) { |
| 2136 | if (!error) |
| 2137 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 2138 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 2139 | } |
| 2140 | #endif |
| 2141 | nfsm_reqdone; |
| 2142 | /* |
| 2143 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
| 2144 | */ |
| 2145 | if (rexmit && error == EEXIST) |
| 2146 | error = 0; |
| 2147 | if (error == 0 || error == EEXIST) |
| 2148 | cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); |
| 2149 | if (error == 0 && newvp == NULL) { |
| 2150 | struct nfsnode *np = NULL; |
| 2151 | |
| 2152 | error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 2153 | cnp->cn_cred, curlwp, &np); |
| 2154 | if (error == 0) |
| 2155 | newvp = NFSTOV(np); |
| 2156 | } |
| 2157 | if (error) { |
| 2158 | if (newvp != NULL) |
| 2159 | vput(newvp); |
| 2160 | } else { |
| 2161 | *ap->a_vpp = newvp; |
| 2162 | VOP_UNLOCK(newvp); |
| 2163 | } |
| 2164 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2165 | if (!wccflag) |
| 2166 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 2167 | VN_KNOTE(dvp, NOTE_WRITE); |
| 2168 | return (error); |
| 2169 | } |
| 2170 | |
| 2171 | /* |
| 2172 | * nfs make dir call |
| 2173 | */ |
| 2174 | int |
| 2175 | nfs_mkdir(void *v) |
| 2176 | { |
| 2177 | struct vop_mkdir_v3_args /* { |
| 2178 | struct vnode *a_dvp; |
| 2179 | struct vnode **a_vpp; |
| 2180 | struct componentname *a_cnp; |
| 2181 | struct vattr *a_vap; |
| 2182 | } */ *ap = v; |
| 2183 | struct vnode *dvp = ap->a_dvp; |
| 2184 | struct vattr *vap = ap->a_vap; |
| 2185 | struct componentname *cnp = ap->a_cnp; |
| 2186 | struct nfsv2_sattr *sp; |
| 2187 | u_int32_t *tl; |
| 2188 | char *cp; |
| 2189 | int32_t t1, t2; |
| 2190 | int len; |
| 2191 | struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; |
| 2192 | struct vnode *newvp = (struct vnode *)0; |
| 2193 | char *bpos, *dpos, *cp2; |
| 2194 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2195 | int gotvp = 0; |
| 2196 | int rexmit = 0; |
| 2197 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2198 | const int v3 = NFS_ISV3(dvp); |
| 2199 | |
| 2200 | len = cnp->cn_namelen; |
| 2201 | nfsstats.rpccnt[NFSPROC_MKDIR]++; |
| 2202 | nfsm_reqhead(dnp, NFSPROC_MKDIR, |
| 2203 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); |
| 2204 | nfsm_fhtom(dnp, v3); |
| 2205 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 2206 | #ifndef NFS_V2_ONLY |
| 2207 | if (v3) { |
| 2208 | nfsm_v3attrbuild(vap, false); |
| 2209 | } else |
| 2210 | #endif |
| 2211 | { |
| 2212 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 2213 | sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); |
| 2214 | sp->sa_uid = nfs_xdrneg1; |
| 2215 | sp->sa_gid = nfs_xdrneg1; |
| 2216 | sp->sa_size = nfs_xdrneg1; |
| 2217 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 2218 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 2219 | } |
| 2220 | nfsm_request1(dnp, NFSPROC_MKDIR, curlwp, cnp->cn_cred, &rexmit); |
| 2221 | if (!error) |
| 2222 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 2223 | if (v3) |
| 2224 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 2225 | nfsm_reqdone; |
| 2226 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2227 | if (!wccflag) |
| 2228 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 2229 | /* |
| 2230 | * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry |
| 2231 | * if we can succeed in looking up the directory. |
| 2232 | */ |
| 2233 | if ((rexmit && error == EEXIST) || (!error && !gotvp)) { |
| 2234 | if (newvp) { |
| 2235 | vput(newvp); |
| 2236 | newvp = (struct vnode *)0; |
| 2237 | } |
| 2238 | error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, |
| 2239 | curlwp, &np); |
| 2240 | if (!error) { |
| 2241 | newvp = NFSTOV(np); |
| 2242 | if (newvp->v_type != VDIR || newvp == dvp) |
| 2243 | error = EEXIST; |
| 2244 | } |
| 2245 | } |
| 2246 | if (error) { |
| 2247 | if (newvp) { |
| 2248 | if (dvp != newvp) |
| 2249 | vput(newvp); |
| 2250 | else |
| 2251 | vrele(newvp); |
| 2252 | } |
| 2253 | } else { |
| 2254 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 2255 | nfs_cache_enter(dvp, newvp, cnp); |
| 2256 | *ap->a_vpp = newvp; |
| 2257 | VOP_UNLOCK(newvp); |
| 2258 | } |
| 2259 | return (error); |
| 2260 | } |
| 2261 | |
| 2262 | /* |
| 2263 | * nfs remove directory call |
| 2264 | */ |
| 2265 | int |
| 2266 | nfs_rmdir(void *v) |
| 2267 | { |
| 2268 | struct vop_rmdir_args /* { |
| 2269 | struct vnode *a_dvp; |
| 2270 | struct vnode *a_vp; |
| 2271 | struct componentname *a_cnp; |
| 2272 | } */ *ap = v; |
| 2273 | struct vnode *vp = ap->a_vp; |
| 2274 | struct vnode *dvp = ap->a_dvp; |
| 2275 | struct componentname *cnp = ap->a_cnp; |
| 2276 | u_int32_t *tl; |
| 2277 | char *cp; |
| 2278 | #ifndef NFS_V2_ONLY |
| 2279 | int32_t t1; |
| 2280 | char *cp2; |
| 2281 | #endif |
| 2282 | int32_t t2; |
| 2283 | char *bpos, *dpos; |
| 2284 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2285 | int rexmit = 0; |
| 2286 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2287 | const int v3 = NFS_ISV3(dvp); |
| 2288 | struct nfsnode *dnp; |
| 2289 | |
| 2290 | if (dvp == vp) { |
| 2291 | vrele(dvp); |
| 2292 | vput(dvp); |
| 2293 | return (EINVAL); |
| 2294 | } |
| 2295 | nfsstats.rpccnt[NFSPROC_RMDIR]++; |
| 2296 | dnp = VTONFS(dvp); |
| 2297 | nfsm_reqhead(dnp, NFSPROC_RMDIR, |
| 2298 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
| 2299 | nfsm_fhtom(dnp, v3); |
| 2300 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 2301 | nfsm_request1(dnp, NFSPROC_RMDIR, curlwp, cnp->cn_cred, &rexmit); |
| 2302 | #ifndef NFS_V2_ONLY |
| 2303 | if (v3) |
| 2304 | nfsm_wcc_data(dvp, wccflag, 0, !error); |
| 2305 | #endif |
| 2306 | nfsm_reqdone; |
| 2307 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2308 | if (!wccflag) |
| 2309 | NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); |
| 2310 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 2311 | VN_KNOTE(vp, NOTE_DELETE); |
| 2312 | cache_purge(vp); |
| 2313 | vput(vp); |
| 2314 | vput(dvp); |
| 2315 | /* |
| 2316 | * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. |
| 2317 | */ |
| 2318 | if (rexmit && error == ENOENT) |
| 2319 | error = 0; |
| 2320 | return (error); |
| 2321 | } |
| 2322 | |
| 2323 | /* |
| 2324 | * nfs readdir call |
| 2325 | */ |
| 2326 | int |
| 2327 | nfs_readdir(void *v) |
| 2328 | { |
| 2329 | struct vop_readdir_args /* { |
| 2330 | struct vnode *a_vp; |
| 2331 | struct uio *a_uio; |
| 2332 | kauth_cred_t a_cred; |
| 2333 | int *a_eofflag; |
| 2334 | off_t **a_cookies; |
| 2335 | int *a_ncookies; |
| 2336 | } */ *ap = v; |
| 2337 | struct vnode *vp = ap->a_vp; |
| 2338 | struct uio *uio = ap->a_uio; |
| 2339 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2340 | char *base = uio->uio_iov->iov_base; |
| 2341 | int tresid, error; |
| 2342 | size_t count, lost; |
| 2343 | struct dirent *dp; |
| 2344 | off_t *cookies = NULL; |
| 2345 | int ncookies = 0, nc; |
| 2346 | |
| 2347 | if (vp->v_type != VDIR) |
| 2348 | return (EPERM); |
| 2349 | |
| 2350 | lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); |
| 2351 | count = uio->uio_resid - lost; |
| 2352 | if (count <= 0) |
| 2353 | return (EINVAL); |
| 2354 | |
| 2355 | /* |
| 2356 | * Call nfs_bioread() to do the real work. |
| 2357 | */ |
| 2358 | tresid = uio->uio_resid = count; |
| 2359 | error = nfs_bioread(vp, uio, 0, ap->a_cred, |
| 2360 | ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); |
| 2361 | |
| 2362 | if (!error && ap->a_cookies) { |
| 2363 | ncookies = count / 16; |
| 2364 | cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); |
| 2365 | *ap->a_cookies = cookies; |
| 2366 | } |
| 2367 | |
| 2368 | if (!error && uio->uio_resid == tresid) { |
| 2369 | uio->uio_resid += lost; |
| 2370 | nfsstats.direofcache_misses++; |
| 2371 | if (ap->a_cookies) |
| 2372 | *ap->a_ncookies = 0; |
| 2373 | *ap->a_eofflag = 1; |
| 2374 | return (0); |
| 2375 | } |
| 2376 | |
| 2377 | if (!error && ap->a_cookies) { |
| 2378 | /* |
| 2379 | * Only the NFS server and emulations use cookies, and they |
| 2380 | * load the directory block into system space, so we can |
| 2381 | * just look at it directly. |
| 2382 | */ |
| 2383 | if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || |
| 2384 | uio->uio_iovcnt != 1) |
| 2385 | panic("nfs_readdir: lost in space" ); |
| 2386 | for (nc = 0; ncookies-- && |
| 2387 | base < (char *)uio->uio_iov->iov_base; nc++){ |
| 2388 | dp = (struct dirent *) base; |
| 2389 | if (dp->d_reclen == 0) |
| 2390 | break; |
| 2391 | if (nmp->nm_flag & NFSMNT_XLATECOOKIE) |
| 2392 | *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); |
| 2393 | else |
| 2394 | *(cookies++) = NFS_GETCOOKIE(dp); |
| 2395 | base += dp->d_reclen; |
| 2396 | } |
| 2397 | uio->uio_resid += |
| 2398 | ((char *)uio->uio_iov->iov_base - base); |
| 2399 | uio->uio_iov->iov_len += |
| 2400 | ((char *)uio->uio_iov->iov_base - base); |
| 2401 | uio->uio_iov->iov_base = base; |
| 2402 | *ap->a_ncookies = nc; |
| 2403 | } |
| 2404 | |
| 2405 | uio->uio_resid += lost; |
| 2406 | *ap->a_eofflag = 0; |
| 2407 | return (error); |
| 2408 | } |
| 2409 | |
| 2410 | /* |
| 2411 | * Readdir rpc call. |
| 2412 | * Called from below the buffer cache by nfs_doio(). |
| 2413 | */ |
| 2414 | int |
| 2415 | nfs_readdirrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
| 2416 | { |
| 2417 | int len, left; |
| 2418 | struct dirent *dp = NULL; |
| 2419 | u_int32_t *tl; |
| 2420 | char *cp; |
| 2421 | int32_t t1, t2; |
| 2422 | char *bpos, *dpos, *cp2; |
| 2423 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2424 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2425 | struct nfsnode *dnp = VTONFS(vp); |
| 2426 | u_quad_t fileno; |
| 2427 | int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; |
| 2428 | #ifndef NFS_V2_ONLY |
| 2429 | int attrflag; |
| 2430 | #endif |
| 2431 | int nrpcs = 0, reclen; |
| 2432 | const int v3 = NFS_ISV3(vp); |
| 2433 | |
| 2434 | #ifdef DIAGNOSTIC |
| 2435 | /* |
| 2436 | * Should be called from buffer cache, so only amount of |
| 2437 | * NFS_DIRBLKSIZ will be requested. |
| 2438 | */ |
| 2439 | if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) |
| 2440 | panic("nfs readdirrpc bad uio" ); |
| 2441 | #endif |
| 2442 | |
| 2443 | /* |
| 2444 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2445 | * truncated to a multiple of NFS_DIRFRAGSIZ. |
| 2446 | * The stopping criteria is EOF or buffer full. |
| 2447 | */ |
| 2448 | while (more_dirs && bigenough) { |
| 2449 | /* |
| 2450 | * Heuristic: don't bother to do another RPC to further |
| 2451 | * fill up this block if there is not much room left. (< 50% |
| 2452 | * of the readdir RPC size). This wastes some buffer space |
| 2453 | * but can save up to 50% in RPC calls. |
| 2454 | */ |
| 2455 | if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { |
| 2456 | bigenough = 0; |
| 2457 | break; |
| 2458 | } |
| 2459 | nfsstats.rpccnt[NFSPROC_READDIR]++; |
| 2460 | nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + |
| 2461 | NFSX_READDIR(v3)); |
| 2462 | nfsm_fhtom(dnp, v3); |
| 2463 | #ifndef NFS_V2_ONLY |
| 2464 | if (v3) { |
| 2465 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 2466 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { |
| 2467 | txdr_swapcookie3(uiop->uio_offset, tl); |
| 2468 | } else { |
| 2469 | txdr_cookie3(uiop->uio_offset, tl); |
| 2470 | } |
| 2471 | tl += 2; |
| 2472 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2473 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2474 | } else |
| 2475 | #endif |
| 2476 | { |
| 2477 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 2478 | *tl++ = txdr_unsigned(uiop->uio_offset); |
| 2479 | } |
| 2480 | *tl = txdr_unsigned(nmp->nm_readdirsize); |
| 2481 | nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); |
| 2482 | nrpcs++; |
| 2483 | #ifndef NFS_V2_ONLY |
| 2484 | if (v3) { |
| 2485 | nfsm_postop_attr(vp, attrflag, 0); |
| 2486 | if (!error) { |
| 2487 | nfsm_dissect(tl, u_int32_t *, |
| 2488 | 2 * NFSX_UNSIGNED); |
| 2489 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2490 | dnp->n_cookieverf.nfsuquad[1] = *tl; |
| 2491 | } else { |
| 2492 | m_freem(mrep); |
| 2493 | goto nfsmout; |
| 2494 | } |
| 2495 | } |
| 2496 | #endif |
| 2497 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2498 | more_dirs = fxdr_unsigned(int, *tl); |
| 2499 | |
| 2500 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2501 | while (more_dirs && bigenough) { |
| 2502 | #ifndef NFS_V2_ONLY |
| 2503 | if (v3) { |
| 2504 | nfsm_dissect(tl, u_int32_t *, |
| 2505 | 3 * NFSX_UNSIGNED); |
| 2506 | fileno = fxdr_hyper(tl); |
| 2507 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2508 | } else |
| 2509 | #endif |
| 2510 | { |
| 2511 | nfsm_dissect(tl, u_int32_t *, |
| 2512 | 2 * NFSX_UNSIGNED); |
| 2513 | fileno = fxdr_unsigned(u_quad_t, *tl++); |
| 2514 | len = fxdr_unsigned(int, *tl); |
| 2515 | } |
| 2516 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2517 | error = EBADRPC; |
| 2518 | m_freem(mrep); |
| 2519 | goto nfsmout; |
| 2520 | } |
| 2521 | /* for cookie stashing */ |
| 2522 | reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); |
| 2523 | left = NFS_DIRFRAGSIZ - blksiz; |
| 2524 | if (reclen > left) { |
| 2525 | memset(uiop->uio_iov->iov_base, 0, left); |
| 2526 | dp->d_reclen += left; |
| 2527 | UIO_ADVANCE(uiop, left); |
| 2528 | blksiz = 0; |
| 2529 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2530 | } |
| 2531 | if (reclen > uiop->uio_resid) |
| 2532 | bigenough = 0; |
| 2533 | if (bigenough) { |
| 2534 | int tlen; |
| 2535 | |
| 2536 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2537 | dp->d_fileno = fileno; |
| 2538 | dp->d_namlen = len; |
| 2539 | dp->d_reclen = reclen; |
| 2540 | dp->d_type = DT_UNKNOWN; |
| 2541 | blksiz += reclen; |
| 2542 | if (blksiz == NFS_DIRFRAGSIZ) |
| 2543 | blksiz = 0; |
| 2544 | UIO_ADVANCE(uiop, DIRHDSIZ); |
| 2545 | nfsm_mtouio(uiop, len); |
| 2546 | tlen = reclen - (DIRHDSIZ + len); |
| 2547 | (void)memset(uiop->uio_iov->iov_base, 0, tlen); |
| 2548 | UIO_ADVANCE(uiop, tlen); |
| 2549 | } else |
| 2550 | nfsm_adv(nfsm_rndup(len)); |
| 2551 | #ifndef NFS_V2_ONLY |
| 2552 | if (v3) { |
| 2553 | nfsm_dissect(tl, u_int32_t *, |
| 2554 | 3 * NFSX_UNSIGNED); |
| 2555 | } else |
| 2556 | #endif |
| 2557 | { |
| 2558 | nfsm_dissect(tl, u_int32_t *, |
| 2559 | 2 * NFSX_UNSIGNED); |
| 2560 | } |
| 2561 | if (bigenough) { |
| 2562 | #ifndef NFS_V2_ONLY |
| 2563 | if (v3) { |
| 2564 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) |
| 2565 | uiop->uio_offset = |
| 2566 | fxdr_swapcookie3(tl); |
| 2567 | else |
| 2568 | uiop->uio_offset = |
| 2569 | fxdr_cookie3(tl); |
| 2570 | } |
| 2571 | else |
| 2572 | #endif |
| 2573 | { |
| 2574 | uiop->uio_offset = |
| 2575 | fxdr_unsigned(off_t, *tl); |
| 2576 | } |
| 2577 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2578 | } |
| 2579 | if (v3) |
| 2580 | tl += 2; |
| 2581 | else |
| 2582 | tl++; |
| 2583 | more_dirs = fxdr_unsigned(int, *tl); |
| 2584 | } |
| 2585 | /* |
| 2586 | * If at end of rpc data, get the eof boolean |
| 2587 | */ |
| 2588 | if (!more_dirs) { |
| 2589 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2590 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2591 | |
| 2592 | /* |
| 2593 | * kludge: if we got no entries, treat it as EOF. |
| 2594 | * some server sometimes send a reply without any |
| 2595 | * entries or EOF. |
| 2596 | * although it might mean the server has very long name, |
| 2597 | * we can't handle such entries anyway. |
| 2598 | */ |
| 2599 | |
| 2600 | if (uiop->uio_resid >= NFS_DIRBLKSIZ) |
| 2601 | more_dirs = 0; |
| 2602 | } |
| 2603 | m_freem(mrep); |
| 2604 | } |
| 2605 | /* |
| 2606 | * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ |
| 2607 | * by increasing d_reclen for the last record. |
| 2608 | */ |
| 2609 | if (blksiz > 0) { |
| 2610 | left = NFS_DIRFRAGSIZ - blksiz; |
| 2611 | memset(uiop->uio_iov->iov_base, 0, left); |
| 2612 | dp->d_reclen += left; |
| 2613 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2614 | UIO_ADVANCE(uiop, left); |
| 2615 | } |
| 2616 | |
| 2617 | /* |
| 2618 | * We are now either at the end of the directory or have filled the |
| 2619 | * block. |
| 2620 | */ |
| 2621 | if (bigenough) { |
| 2622 | dnp->n_direofoffset = uiop->uio_offset; |
| 2623 | dnp->n_flag |= NEOFVALID; |
| 2624 | } |
| 2625 | nfsmout: |
| 2626 | return (error); |
| 2627 | } |
| 2628 | |
| 2629 | #ifndef NFS_V2_ONLY |
| 2630 | /* |
| 2631 | * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). |
| 2632 | */ |
| 2633 | int |
| 2634 | nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) |
| 2635 | { |
| 2636 | int len, left; |
| 2637 | struct dirent *dp = NULL; |
| 2638 | u_int32_t *tl; |
| 2639 | char *cp; |
| 2640 | int32_t t1, t2; |
| 2641 | struct vnode *newvp; |
| 2642 | char *bpos, *dpos, *cp2; |
| 2643 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2644 | struct nameidata nami, *ndp = &nami; |
| 2645 | struct componentname *cnp = &ndp->ni_cnd; |
| 2646 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2647 | struct nfsnode *dnp = VTONFS(vp), *np; |
| 2648 | nfsfh_t *fhp; |
| 2649 | u_quad_t fileno; |
| 2650 | int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; |
| 2651 | int attrflag, fhsize, nrpcs = 0, reclen; |
| 2652 | struct nfs_fattr fattr, *fp; |
| 2653 | |
| 2654 | #ifdef DIAGNOSTIC |
| 2655 | if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) |
| 2656 | panic("nfs readdirplusrpc bad uio" ); |
| 2657 | #endif |
| 2658 | ndp->ni_dvp = vp; |
| 2659 | newvp = NULLVP; |
| 2660 | |
| 2661 | /* |
| 2662 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2663 | * truncated to a multiple of NFS_DIRFRAGSIZ. |
| 2664 | * The stopping criteria is EOF or buffer full. |
| 2665 | */ |
| 2666 | while (more_dirs && bigenough) { |
| 2667 | if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { |
| 2668 | bigenough = 0; |
| 2669 | break; |
| 2670 | } |
| 2671 | nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; |
| 2672 | nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, |
| 2673 | NFSX_FH(1) + 6 * NFSX_UNSIGNED); |
| 2674 | nfsm_fhtom(dnp, 1); |
| 2675 | nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); |
| 2676 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { |
| 2677 | txdr_swapcookie3(uiop->uio_offset, tl); |
| 2678 | } else { |
| 2679 | txdr_cookie3(uiop->uio_offset, tl); |
| 2680 | } |
| 2681 | tl += 2; |
| 2682 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2683 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2684 | *tl++ = txdr_unsigned(nmp->nm_readdirsize); |
| 2685 | *tl = txdr_unsigned(nmp->nm_rsize); |
| 2686 | nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); |
| 2687 | nfsm_postop_attr(vp, attrflag, 0); |
| 2688 | if (error) { |
| 2689 | m_freem(mrep); |
| 2690 | goto nfsmout; |
| 2691 | } |
| 2692 | nrpcs++; |
| 2693 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2694 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2695 | dnp->n_cookieverf.nfsuquad[1] = *tl++; |
| 2696 | more_dirs = fxdr_unsigned(int, *tl); |
| 2697 | |
| 2698 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2699 | while (more_dirs && bigenough) { |
| 2700 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2701 | fileno = fxdr_hyper(tl); |
| 2702 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2703 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2704 | error = EBADRPC; |
| 2705 | m_freem(mrep); |
| 2706 | goto nfsmout; |
| 2707 | } |
| 2708 | /* for cookie stashing */ |
| 2709 | reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); |
| 2710 | left = NFS_DIRFRAGSIZ - blksiz; |
| 2711 | if (reclen > left) { |
| 2712 | /* |
| 2713 | * DIRFRAGSIZ is aligned, no need to align |
| 2714 | * again here. |
| 2715 | */ |
| 2716 | memset(uiop->uio_iov->iov_base, 0, left); |
| 2717 | dp->d_reclen += left; |
| 2718 | UIO_ADVANCE(uiop, left); |
| 2719 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2720 | blksiz = 0; |
| 2721 | } |
| 2722 | if (reclen > uiop->uio_resid) |
| 2723 | bigenough = 0; |
| 2724 | if (bigenough) { |
| 2725 | int tlen; |
| 2726 | |
| 2727 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2728 | dp->d_fileno = fileno; |
| 2729 | dp->d_namlen = len; |
| 2730 | dp->d_reclen = reclen; |
| 2731 | dp->d_type = DT_UNKNOWN; |
| 2732 | blksiz += reclen; |
| 2733 | if (blksiz == NFS_DIRFRAGSIZ) |
| 2734 | blksiz = 0; |
| 2735 | UIO_ADVANCE(uiop, DIRHDSIZ); |
| 2736 | nfsm_mtouio(uiop, len); |
| 2737 | tlen = reclen - (DIRHDSIZ + len); |
| 2738 | (void)memset(uiop->uio_iov->iov_base, 0, tlen); |
| 2739 | UIO_ADVANCE(uiop, tlen); |
| 2740 | cnp->cn_nameptr = dp->d_name; |
| 2741 | cnp->cn_namelen = dp->d_namlen; |
| 2742 | } else |
| 2743 | nfsm_adv(nfsm_rndup(len)); |
| 2744 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2745 | if (bigenough) { |
| 2746 | if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) |
| 2747 | uiop->uio_offset = |
| 2748 | fxdr_swapcookie3(tl); |
| 2749 | else |
| 2750 | uiop->uio_offset = |
| 2751 | fxdr_cookie3(tl); |
| 2752 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2753 | } |
| 2754 | tl += 2; |
| 2755 | |
| 2756 | /* |
| 2757 | * Since the attributes are before the file handle |
| 2758 | * (sigh), we must skip over the attributes and then |
| 2759 | * come back and get them. |
| 2760 | */ |
| 2761 | attrflag = fxdr_unsigned(int, *tl); |
| 2762 | if (attrflag) { |
| 2763 | nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); |
| 2764 | memcpy(&fattr, fp, NFSX_V3FATTR); |
| 2765 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2766 | doit = fxdr_unsigned(int, *tl); |
| 2767 | if (doit) { |
| 2768 | nfsm_getfh(fhp, fhsize, 1); |
| 2769 | if (NFS_CMPFH(dnp, fhp, fhsize)) { |
| 2770 | vref(vp); |
| 2771 | newvp = vp; |
| 2772 | np = dnp; |
| 2773 | } else { |
| 2774 | error = nfs_nget1(vp->v_mount, fhp, |
| 2775 | fhsize, &np, LK_NOWAIT); |
| 2776 | if (!error) |
| 2777 | newvp = NFSTOV(np); |
| 2778 | } |
| 2779 | if (!error) { |
| 2780 | nfs_loadattrcache(&newvp, &fattr, 0, 0); |
| 2781 | if (bigenough) { |
| 2782 | dp->d_type = |
| 2783 | IFTODT(VTTOIF(np->n_vattr->va_type)); |
| 2784 | if (cnp->cn_namelen <= NCHNAMLEN) { |
| 2785 | ndp->ni_vp = newvp; |
| 2786 | nfs_cache_enter(ndp->ni_dvp, |
| 2787 | ndp->ni_vp, cnp); |
| 2788 | } |
| 2789 | } |
| 2790 | } |
| 2791 | error = 0; |
| 2792 | } |
| 2793 | } else { |
| 2794 | /* Just skip over the file handle */ |
| 2795 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2796 | i = fxdr_unsigned(int, *tl); |
| 2797 | nfsm_adv(nfsm_rndup(i)); |
| 2798 | } |
| 2799 | if (newvp != NULLVP) { |
| 2800 | if (newvp == vp) |
| 2801 | vrele(newvp); |
| 2802 | else |
| 2803 | vput(newvp); |
| 2804 | newvp = NULLVP; |
| 2805 | } |
| 2806 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2807 | more_dirs = fxdr_unsigned(int, *tl); |
| 2808 | } |
| 2809 | /* |
| 2810 | * If at end of rpc data, get the eof boolean |
| 2811 | */ |
| 2812 | if (!more_dirs) { |
| 2813 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2814 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2815 | |
| 2816 | /* |
| 2817 | * kludge: see a comment in nfs_readdirrpc. |
| 2818 | */ |
| 2819 | |
| 2820 | if (uiop->uio_resid >= NFS_DIRBLKSIZ) |
| 2821 | more_dirs = 0; |
| 2822 | } |
| 2823 | m_freem(mrep); |
| 2824 | } |
| 2825 | /* |
| 2826 | * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ |
| 2827 | * by increasing d_reclen for the last record. |
| 2828 | */ |
| 2829 | if (blksiz > 0) { |
| 2830 | left = NFS_DIRFRAGSIZ - blksiz; |
| 2831 | memset(uiop->uio_iov->iov_base, 0, left); |
| 2832 | dp->d_reclen += left; |
| 2833 | NFS_STASHCOOKIE(dp, uiop->uio_offset); |
| 2834 | UIO_ADVANCE(uiop, left); |
| 2835 | } |
| 2836 | |
| 2837 | /* |
| 2838 | * We are now either at the end of the directory or have filled the |
| 2839 | * block. |
| 2840 | */ |
| 2841 | if (bigenough) { |
| 2842 | dnp->n_direofoffset = uiop->uio_offset; |
| 2843 | dnp->n_flag |= NEOFVALID; |
| 2844 | } |
| 2845 | nfsmout: |
| 2846 | if (newvp != NULLVP) { |
| 2847 | if(newvp == vp) |
| 2848 | vrele(newvp); |
| 2849 | else |
| 2850 | vput(newvp); |
| 2851 | } |
| 2852 | return (error); |
| 2853 | } |
| 2854 | #endif |
| 2855 | |
| 2856 | /* |
| 2857 | * Silly rename. To make the NFS filesystem that is stateless look a little |
| 2858 | * more like the "ufs" a remove of an active vnode is translated to a rename |
| 2859 | * to a funny looking filename that is removed by nfs_inactive on the |
| 2860 | * nfsnode. There is the potential for another process on a different client |
| 2861 | * to create the same funny name between the nfs_lookitup() fails and the |
| 2862 | * nfs_rename() completes, but... |
| 2863 | */ |
| 2864 | int |
| 2865 | nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp, bool dolink) |
| 2866 | { |
| 2867 | struct sillyrename *sp; |
| 2868 | struct nfsnode *np; |
| 2869 | int error; |
| 2870 | pid_t pid; |
| 2871 | |
| 2872 | cache_purge(dvp); |
| 2873 | np = VTONFS(vp); |
| 2874 | #ifndef DIAGNOSTIC |
| 2875 | if (vp->v_type == VDIR) |
| 2876 | panic("nfs: sillyrename dir" ); |
| 2877 | #endif |
| 2878 | sp = kmem_alloc(sizeof(*sp), KM_SLEEP); |
| 2879 | sp->s_cred = kauth_cred_dup(cnp->cn_cred); |
| 2880 | sp->s_dvp = dvp; |
| 2881 | vref(dvp); |
| 2882 | |
| 2883 | /* Fudge together a funny name */ |
| 2884 | pid = curlwp->l_proc->p_pid; |
| 2885 | memcpy(sp->s_name, ".nfsAxxxx4.4" , 13); |
| 2886 | sp->s_namlen = 12; |
| 2887 | sp->s_name[8] = hexdigits[pid & 0xf]; |
| 2888 | sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; |
| 2889 | sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; |
| 2890 | sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; |
| 2891 | |
| 2892 | /* Try lookitups until we get one that isn't there */ |
| 2893 | while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2894 | curlwp, (struct nfsnode **)0) == 0) { |
| 2895 | sp->s_name[4]++; |
| 2896 | if (sp->s_name[4] > 'z') { |
| 2897 | error = EINVAL; |
| 2898 | goto bad; |
| 2899 | } |
| 2900 | } |
| 2901 | if (dolink) { |
| 2902 | error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, |
| 2903 | sp->s_cred, curlwp); |
| 2904 | /* |
| 2905 | * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. |
| 2906 | */ |
| 2907 | if (error == ENOTSUP) { |
| 2908 | error = nfs_renameit(dvp, cnp, sp); |
| 2909 | } |
| 2910 | } else { |
| 2911 | error = nfs_renameit(dvp, cnp, sp); |
| 2912 | } |
| 2913 | if (error) |
| 2914 | goto bad; |
| 2915 | error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2916 | curlwp, &np); |
| 2917 | np->n_sillyrename = sp; |
| 2918 | return (0); |
| 2919 | bad: |
| 2920 | vrele(sp->s_dvp); |
| 2921 | kauth_cred_free(sp->s_cred); |
| 2922 | kmem_free(sp, sizeof(*sp)); |
| 2923 | return (error); |
| 2924 | } |
| 2925 | |
| 2926 | /* |
| 2927 | * Look up a file name and optionally either update the file handle or |
| 2928 | * allocate an nfsnode, depending on the value of npp. |
| 2929 | * npp == NULL --> just do the lookup |
| 2930 | * *npp == NULL --> allocate a new nfsnode and make sure attributes are |
| 2931 | * handled too |
| 2932 | * *npp != NULL --> update the file handle in the vnode |
| 2933 | */ |
| 2934 | int |
| 2935 | nfs_lookitup(struct vnode *dvp, const char *name, int len, kauth_cred_t cred, struct lwp *l, struct nfsnode **npp) |
| 2936 | { |
| 2937 | u_int32_t *tl; |
| 2938 | char *cp; |
| 2939 | int32_t t1, t2; |
| 2940 | struct vnode *newvp = (struct vnode *)0; |
| 2941 | struct nfsnode *np, *dnp = VTONFS(dvp); |
| 2942 | char *bpos, *dpos, *cp2; |
| 2943 | int error = 0, ofhlen, fhlen; |
| 2944 | #ifndef NFS_V2_ONLY |
| 2945 | int attrflag; |
| 2946 | #endif |
| 2947 | struct mbuf *mreq, *mrep, *md, *mb; |
| 2948 | nfsfh_t *ofhp, *nfhp; |
| 2949 | const int v3 = NFS_ISV3(dvp); |
| 2950 | |
| 2951 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 2952 | nfsm_reqhead(dnp, NFSPROC_LOOKUP, |
| 2953 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 2954 | nfsm_fhtom(dnp, v3); |
| 2955 | nfsm_strtom(name, len, NFS_MAXNAMLEN); |
| 2956 | nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); |
| 2957 | if (npp && !error) { |
| 2958 | nfsm_getfh(nfhp, fhlen, v3); |
| 2959 | if (*npp) { |
| 2960 | np = *npp; |
| 2961 | newvp = NFSTOV(np); |
| 2962 | ofhlen = np->n_fhsize; |
| 2963 | ofhp = kmem_alloc(ofhlen, KM_SLEEP); |
| 2964 | memcpy(ofhp, np->n_fhp, ofhlen); |
| 2965 | error = vcache_rekey_enter(newvp->v_mount, newvp, |
| 2966 | ofhp, ofhlen, nfhp, fhlen); |
| 2967 | if (error) { |
| 2968 | kmem_free(ofhp, ofhlen); |
| 2969 | m_freem(mrep); |
| 2970 | return error; |
| 2971 | } |
| 2972 | if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { |
| 2973 | kmem_free(np->n_fhp, np->n_fhsize); |
| 2974 | np->n_fhp = &np->n_fh; |
| 2975 | } |
| 2976 | #if NFS_SMALLFH < NFSX_V3FHMAX |
| 2977 | else if (np->n_fhsize <= NFS_SMALLFH && fhlen > NFS_SMALLFH) |
| 2978 | np->n_fhp = kmem_alloc(fhlen, KM_SLEEP); |
| 2979 | #endif |
| 2980 | memcpy(np->n_fhp, nfhp, fhlen); |
| 2981 | np->n_fhsize = fhlen; |
| 2982 | vcache_rekey_exit(newvp->v_mount, newvp, |
| 2983 | ofhp, ofhlen, np->n_fhp, fhlen); |
| 2984 | kmem_free(ofhp, ofhlen); |
| 2985 | } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { |
| 2986 | vref(dvp); |
| 2987 | newvp = dvp; |
| 2988 | np = dnp; |
| 2989 | } else { |
| 2990 | error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); |
| 2991 | if (error) { |
| 2992 | m_freem(mrep); |
| 2993 | return (error); |
| 2994 | } |
| 2995 | newvp = NFSTOV(np); |
| 2996 | } |
| 2997 | #ifndef NFS_V2_ONLY |
| 2998 | if (v3) { |
| 2999 | nfsm_postop_attr(newvp, attrflag, 0); |
| 3000 | if (!attrflag && *npp == NULL) { |
| 3001 | m_freem(mrep); |
| 3002 | vput(newvp); |
| 3003 | return (ENOENT); |
| 3004 | } |
| 3005 | } else |
| 3006 | #endif |
| 3007 | nfsm_loadattr(newvp, (struct vattr *)0, 0); |
| 3008 | } |
| 3009 | nfsm_reqdone; |
| 3010 | if (npp && *npp == NULL) { |
| 3011 | if (error) { |
| 3012 | if (newvp) |
| 3013 | vput(newvp); |
| 3014 | } else |
| 3015 | *npp = np; |
| 3016 | } |
| 3017 | return (error); |
| 3018 | } |
| 3019 | |
| 3020 | #ifndef NFS_V2_ONLY |
| 3021 | /* |
| 3022 | * Nfs Version 3 commit rpc |
| 3023 | */ |
| 3024 | int |
| 3025 | nfs_commit(struct vnode *vp, off_t offset, uint32_t cnt, struct lwp *l) |
| 3026 | { |
| 3027 | char *cp; |
| 3028 | u_int32_t *tl; |
| 3029 | int32_t t1, t2; |
| 3030 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 3031 | char *bpos, *dpos, *cp2; |
| 3032 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 3033 | struct mbuf *mreq, *mrep, *md, *mb; |
| 3034 | struct nfsnode *np; |
| 3035 | |
| 3036 | KASSERT(NFS_ISV3(vp)); |
| 3037 | |
| 3038 | #ifdef NFS_DEBUG_COMMIT |
| 3039 | printf("commit %lu - %lu\n" , (unsigned long)offset, |
| 3040 | (unsigned long)(offset + cnt)); |
| 3041 | #endif |
| 3042 | |
| 3043 | mutex_enter(&nmp->nm_lock); |
| 3044 | if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { |
| 3045 | mutex_exit(&nmp->nm_lock); |
| 3046 | return (0); |
| 3047 | } |
| 3048 | mutex_exit(&nmp->nm_lock); |
| 3049 | nfsstats.rpccnt[NFSPROC_COMMIT]++; |
| 3050 | np = VTONFS(vp); |
| 3051 | nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); |
| 3052 | nfsm_fhtom(np, 1); |
| 3053 | nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 3054 | txdr_hyper(offset, tl); |
| 3055 | tl += 2; |
| 3056 | *tl = txdr_unsigned(cnt); |
| 3057 | nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); |
| 3058 | nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); |
| 3059 | if (!error) { |
| 3060 | nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); |
| 3061 | mutex_enter(&nmp->nm_lock); |
| 3062 | if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || |
| 3063 | memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { |
| 3064 | memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); |
| 3065 | error = NFSERR_STALEWRITEVERF; |
| 3066 | nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; |
| 3067 | } |
| 3068 | mutex_exit(&nmp->nm_lock); |
| 3069 | } |
| 3070 | nfsm_reqdone; |
| 3071 | return (error); |
| 3072 | } |
| 3073 | #endif |
| 3074 | |
| 3075 | /* |
| 3076 | * Kludge City.. |
| 3077 | * - make nfs_bmap() essentially a no-op that does no translation |
| 3078 | * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc |
| 3079 | * (Maybe I could use the process's page mapping, but I was concerned that |
| 3080 | * Kernel Write might not be enabled and also figured copyout() would do |
| 3081 | * a lot more work than memcpy() and also it currently happens in the |
| 3082 | * context of the swapper process (2). |
| 3083 | */ |
| 3084 | int |
| 3085 | nfs_bmap(void *v) |
| 3086 | { |
| 3087 | struct vop_bmap_args /* { |
| 3088 | struct vnode *a_vp; |
| 3089 | daddr_t a_bn; |
| 3090 | struct vnode **a_vpp; |
| 3091 | daddr_t *a_bnp; |
| 3092 | int *a_runp; |
| 3093 | } */ *ap = v; |
| 3094 | struct vnode *vp = ap->a_vp; |
| 3095 | int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; |
| 3096 | |
| 3097 | if (ap->a_vpp != NULL) |
| 3098 | *ap->a_vpp = vp; |
| 3099 | if (ap->a_bnp != NULL) |
| 3100 | *ap->a_bnp = ap->a_bn << bshift; |
| 3101 | if (ap->a_runp != NULL) |
| 3102 | *ap->a_runp = 1024 * 1024; /* XXX */ |
| 3103 | return (0); |
| 3104 | } |
| 3105 | |
| 3106 | /* |
| 3107 | * Strategy routine. |
| 3108 | * For async requests when nfsiod(s) are running, queue the request by |
| 3109 | * calling nfs_asyncio(), otherwise just all nfs_doio() to do the |
| 3110 | * request. |
| 3111 | */ |
| 3112 | int |
| 3113 | nfs_strategy(void *v) |
| 3114 | { |
| 3115 | struct vop_strategy_args *ap = v; |
| 3116 | struct buf *bp = ap->a_bp; |
| 3117 | int error = 0; |
| 3118 | |
| 3119 | if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) |
| 3120 | panic("nfs physio/async" ); |
| 3121 | |
| 3122 | /* |
| 3123 | * If the op is asynchronous and an i/o daemon is waiting |
| 3124 | * queue the request, wake it up and wait for completion |
| 3125 | * otherwise just do it ourselves. |
| 3126 | */ |
| 3127 | if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) |
| 3128 | error = nfs_doio(bp); |
| 3129 | return (error); |
| 3130 | } |
| 3131 | |
| 3132 | /* |
| 3133 | * fsync vnode op. Just call nfs_flush() with commit == 1. |
| 3134 | */ |
| 3135 | /* ARGSUSED */ |
| 3136 | int |
| 3137 | nfs_fsync(void *v) |
| 3138 | { |
| 3139 | struct vop_fsync_args /* { |
| 3140 | struct vnodeop_desc *a_desc; |
| 3141 | struct vnode * a_vp; |
| 3142 | kauth_cred_t a_cred; |
| 3143 | int a_flags; |
| 3144 | off_t offlo; |
| 3145 | off_t offhi; |
| 3146 | struct lwp * a_l; |
| 3147 | } */ *ap = v; |
| 3148 | |
| 3149 | struct vnode *vp = ap->a_vp; |
| 3150 | |
| 3151 | if (vp->v_type != VREG) |
| 3152 | return 0; |
| 3153 | |
| 3154 | return (nfs_flush(vp, ap->a_cred, |
| 3155 | (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, curlwp, 1)); |
| 3156 | } |
| 3157 | |
| 3158 | /* |
| 3159 | * Flush all the data associated with a vnode. |
| 3160 | */ |
| 3161 | int |
| 3162 | nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, |
| 3163 | int commit) |
| 3164 | { |
| 3165 | struct nfsnode *np = VTONFS(vp); |
| 3166 | int error; |
| 3167 | int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; |
| 3168 | UVMHIST_FUNC("nfs_flush" ); UVMHIST_CALLED(ubchist); |
| 3169 | |
| 3170 | mutex_enter(vp->v_interlock); |
| 3171 | error = VOP_PUTPAGES(vp, 0, 0, flushflags); |
| 3172 | if (np->n_flag & NWRITEERR) { |
| 3173 | error = np->n_error; |
| 3174 | np->n_flag &= ~NWRITEERR; |
| 3175 | } |
| 3176 | UVMHIST_LOG(ubchist, "returning %d" , error,0,0,0); |
| 3177 | return (error); |
| 3178 | } |
| 3179 | |
| 3180 | /* |
| 3181 | * Return POSIX pathconf information applicable to nfs. |
| 3182 | * |
| 3183 | * N.B. The NFS V2 protocol doesn't support this RPC. |
| 3184 | */ |
| 3185 | /* ARGSUSED */ |
| 3186 | int |
| 3187 | nfs_pathconf(void *v) |
| 3188 | { |
| 3189 | struct vop_pathconf_args /* { |
| 3190 | struct vnode *a_vp; |
| 3191 | int a_name; |
| 3192 | register_t *a_retval; |
| 3193 | } */ *ap = v; |
| 3194 | struct nfsv3_pathconf *pcp; |
| 3195 | struct vnode *vp = ap->a_vp; |
| 3196 | struct mbuf *mreq, *mrep, *md, *mb; |
| 3197 | int32_t t1, t2; |
| 3198 | u_int32_t *tl; |
| 3199 | char *bpos, *dpos, *cp, *cp2; |
| 3200 | int error = 0, attrflag; |
| 3201 | #ifndef NFS_V2_ONLY |
| 3202 | struct nfsmount *nmp; |
| 3203 | unsigned int l; |
| 3204 | u_int64_t maxsize; |
| 3205 | #endif |
| 3206 | const int v3 = NFS_ISV3(vp); |
| 3207 | struct nfsnode *np = VTONFS(vp); |
| 3208 | |
| 3209 | switch (ap->a_name) { |
| 3210 | /* Names that can be resolved locally. */ |
| 3211 | case _PC_PIPE_BUF: |
| 3212 | *ap->a_retval = PIPE_BUF; |
| 3213 | break; |
| 3214 | case _PC_SYNC_IO: |
| 3215 | *ap->a_retval = 1; |
| 3216 | break; |
| 3217 | /* Names that cannot be resolved locally; do an RPC, if possible. */ |
| 3218 | case _PC_LINK_MAX: |
| 3219 | case _PC_NAME_MAX: |
| 3220 | case _PC_CHOWN_RESTRICTED: |
| 3221 | case _PC_NO_TRUNC: |
| 3222 | if (!v3) { |
| 3223 | error = EINVAL; |
| 3224 | break; |
| 3225 | } |
| 3226 | nfsstats.rpccnt[NFSPROC_PATHCONF]++; |
| 3227 | nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); |
| 3228 | nfsm_fhtom(np, 1); |
| 3229 | nfsm_request(np, NFSPROC_PATHCONF, |
| 3230 | curlwp, curlwp->l_cred); /* XXX */ |
| 3231 | nfsm_postop_attr(vp, attrflag, 0); |
| 3232 | if (!error) { |
| 3233 | nfsm_dissect(pcp, struct nfsv3_pathconf *, |
| 3234 | NFSX_V3PATHCONF); |
| 3235 | switch (ap->a_name) { |
| 3236 | case _PC_LINK_MAX: |
| 3237 | *ap->a_retval = |
| 3238 | fxdr_unsigned(register_t, pcp->pc_linkmax); |
| 3239 | break; |
| 3240 | case _PC_NAME_MAX: |
| 3241 | *ap->a_retval = |
| 3242 | fxdr_unsigned(register_t, pcp->pc_namemax); |
| 3243 | break; |
| 3244 | case _PC_CHOWN_RESTRICTED: |
| 3245 | *ap->a_retval = |
| 3246 | (pcp->pc_chownrestricted == nfs_true); |
| 3247 | break; |
| 3248 | case _PC_NO_TRUNC: |
| 3249 | *ap->a_retval = |
| 3250 | (pcp->pc_notrunc == nfs_true); |
| 3251 | break; |
| 3252 | } |
| 3253 | } |
| 3254 | nfsm_reqdone; |
| 3255 | break; |
| 3256 | case _PC_FILESIZEBITS: |
| 3257 | #ifndef NFS_V2_ONLY |
| 3258 | if (v3) { |
| 3259 | nmp = VFSTONFS(vp->v_mount); |
| 3260 | if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) |
| 3261 | if ((error = nfs_fsinfo(nmp, vp, |
| 3262 | curlwp->l_cred, curlwp)) != 0) /* XXX */ |
| 3263 | break; |
| 3264 | for (l = 0, maxsize = nmp->nm_maxfilesize; |
| 3265 | (maxsize >> l) > 0; l++) |
| 3266 | ; |
| 3267 | *ap->a_retval = l + 1; |
| 3268 | } else |
| 3269 | #endif |
| 3270 | { |
| 3271 | *ap->a_retval = 32; /* NFS V2 limitation */ |
| 3272 | } |
| 3273 | break; |
| 3274 | default: |
| 3275 | error = EINVAL; |
| 3276 | break; |
| 3277 | } |
| 3278 | |
| 3279 | return (error); |
| 3280 | } |
| 3281 | |
| 3282 | /* |
| 3283 | * NFS advisory byte-level locks. |
| 3284 | */ |
| 3285 | int |
| 3286 | nfs_advlock(void *v) |
| 3287 | { |
| 3288 | struct vop_advlock_args /* { |
| 3289 | struct vnode *a_vp; |
| 3290 | void *a_id; |
| 3291 | int a_op; |
| 3292 | struct flock *a_fl; |
| 3293 | int a_flags; |
| 3294 | } */ *ap = v; |
| 3295 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3296 | |
| 3297 | return lf_advlock(ap, &np->n_lockf, np->n_size); |
| 3298 | } |
| 3299 | |
| 3300 | /* |
| 3301 | * Print out the contents of an nfsnode. |
| 3302 | */ |
| 3303 | int |
| 3304 | nfs_print(void *v) |
| 3305 | { |
| 3306 | struct vop_print_args /* { |
| 3307 | struct vnode *a_vp; |
| 3308 | } */ *ap = v; |
| 3309 | struct vnode *vp = ap->a_vp; |
| 3310 | struct nfsnode *np = VTONFS(vp); |
| 3311 | |
| 3312 | printf("tag VT_NFS, fileid %lld fsid 0x%llx" , |
| 3313 | (unsigned long long)np->n_vattr->va_fileid, |
| 3314 | (unsigned long long)np->n_vattr->va_fsid); |
| 3315 | if (vp->v_type == VFIFO) |
| 3316 | VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); |
| 3317 | printf("\n" ); |
| 3318 | return (0); |
| 3319 | } |
| 3320 | |
| 3321 | /* |
| 3322 | * nfs unlock wrapper. |
| 3323 | */ |
| 3324 | int |
| 3325 | nfs_unlock(void *v) |
| 3326 | { |
| 3327 | struct vop_unlock_args /* { |
| 3328 | struct vnode *a_vp; |
| 3329 | int a_flags; |
| 3330 | } */ *ap = v; |
| 3331 | struct vnode *vp = ap->a_vp; |
| 3332 | |
| 3333 | /* |
| 3334 | * VOP_UNLOCK can be called by nfs_loadattrcache |
| 3335 | * with v_data == 0. |
| 3336 | */ |
| 3337 | if (VTONFS(vp)) { |
| 3338 | nfs_delayedtruncate(vp); |
| 3339 | } |
| 3340 | |
| 3341 | return genfs_unlock(v); |
| 3342 | } |
| 3343 | |
| 3344 | /* |
| 3345 | * nfs special file access vnode op. |
| 3346 | * Essentially just get vattr and then imitate iaccess() since the device is |
| 3347 | * local to the client. |
| 3348 | */ |
| 3349 | int |
| 3350 | nfsspec_access(void *v) |
| 3351 | { |
| 3352 | struct vop_access_args /* { |
| 3353 | struct vnode *a_vp; |
| 3354 | int a_mode; |
| 3355 | kauth_cred_t a_cred; |
| 3356 | struct lwp *a_l; |
| 3357 | } */ *ap = v; |
| 3358 | struct vattr va; |
| 3359 | struct vnode *vp = ap->a_vp; |
| 3360 | int error; |
| 3361 | |
| 3362 | error = VOP_GETATTR(vp, &va, ap->a_cred); |
| 3363 | if (error) |
| 3364 | return (error); |
| 3365 | |
| 3366 | /* |
| 3367 | * Disallow write attempts on filesystems mounted read-only; |
| 3368 | * unless the file is a socket, fifo, or a block or character |
| 3369 | * device resident on the filesystem. |
| 3370 | */ |
| 3371 | if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 3372 | switch (vp->v_type) { |
| 3373 | case VREG: |
| 3374 | case VDIR: |
| 3375 | case VLNK: |
| 3376 | return (EROFS); |
| 3377 | default: |
| 3378 | break; |
| 3379 | } |
| 3380 | } |
| 3381 | |
| 3382 | return kauth_authorize_vnode(ap->a_cred, KAUTH_ACCESS_ACTION(ap->a_mode, |
| 3383 | va.va_type, va.va_mode), vp, NULL, genfs_can_access(va.va_type, |
| 3384 | va.va_mode, va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); |
| 3385 | } |
| 3386 | |
| 3387 | /* |
| 3388 | * Read wrapper for special devices. |
| 3389 | */ |
| 3390 | int |
| 3391 | nfsspec_read(void *v) |
| 3392 | { |
| 3393 | struct vop_read_args /* { |
| 3394 | struct vnode *a_vp; |
| 3395 | struct uio *a_uio; |
| 3396 | int a_ioflag; |
| 3397 | kauth_cred_t a_cred; |
| 3398 | } */ *ap = v; |
| 3399 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3400 | |
| 3401 | /* |
| 3402 | * Set access flag. |
| 3403 | */ |
| 3404 | np->n_flag |= NACC; |
| 3405 | getnanotime(&np->n_atim); |
| 3406 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3407 | } |
| 3408 | |
| 3409 | /* |
| 3410 | * Write wrapper for special devices. |
| 3411 | */ |
| 3412 | int |
| 3413 | nfsspec_write(void *v) |
| 3414 | { |
| 3415 | struct vop_write_args /* { |
| 3416 | struct vnode *a_vp; |
| 3417 | struct uio *a_uio; |
| 3418 | int a_ioflag; |
| 3419 | kauth_cred_t a_cred; |
| 3420 | } */ *ap = v; |
| 3421 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3422 | |
| 3423 | /* |
| 3424 | * Set update flag. |
| 3425 | */ |
| 3426 | np->n_flag |= NUPD; |
| 3427 | getnanotime(&np->n_mtim); |
| 3428 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3429 | } |
| 3430 | |
| 3431 | /* |
| 3432 | * Close wrapper for special devices. |
| 3433 | * |
| 3434 | * Update the times on the nfsnode then do device close. |
| 3435 | */ |
| 3436 | int |
| 3437 | nfsspec_close(void *v) |
| 3438 | { |
| 3439 | struct vop_close_args /* { |
| 3440 | struct vnode *a_vp; |
| 3441 | int a_fflag; |
| 3442 | kauth_cred_t a_cred; |
| 3443 | struct lwp *a_l; |
| 3444 | } */ *ap = v; |
| 3445 | struct vnode *vp = ap->a_vp; |
| 3446 | struct nfsnode *np = VTONFS(vp); |
| 3447 | struct vattr vattr; |
| 3448 | |
| 3449 | if (np->n_flag & (NACC | NUPD)) { |
| 3450 | np->n_flag |= NCHG; |
| 3451 | if (vp->v_usecount == 1 && |
| 3452 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3453 | vattr_null(&vattr); |
| 3454 | if (np->n_flag & NACC) |
| 3455 | vattr.va_atime = np->n_atim; |
| 3456 | if (np->n_flag & NUPD) |
| 3457 | vattr.va_mtime = np->n_mtim; |
| 3458 | (void)VOP_SETATTR(vp, &vattr, ap->a_cred); |
| 3459 | } |
| 3460 | } |
| 3461 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3462 | } |
| 3463 | |
| 3464 | /* |
| 3465 | * Read wrapper for fifos. |
| 3466 | */ |
| 3467 | int |
| 3468 | nfsfifo_read(void *v) |
| 3469 | { |
| 3470 | struct vop_read_args /* { |
| 3471 | struct vnode *a_vp; |
| 3472 | struct uio *a_uio; |
| 3473 | int a_ioflag; |
| 3474 | kauth_cred_t a_cred; |
| 3475 | } */ *ap = v; |
| 3476 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3477 | |
| 3478 | /* |
| 3479 | * Set access flag. |
| 3480 | */ |
| 3481 | np->n_flag |= NACC; |
| 3482 | getnanotime(&np->n_atim); |
| 3483 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3484 | } |
| 3485 | |
| 3486 | /* |
| 3487 | * Write wrapper for fifos. |
| 3488 | */ |
| 3489 | int |
| 3490 | nfsfifo_write(void *v) |
| 3491 | { |
| 3492 | struct vop_write_args /* { |
| 3493 | struct vnode *a_vp; |
| 3494 | struct uio *a_uio; |
| 3495 | int a_ioflag; |
| 3496 | kauth_cred_t a_cred; |
| 3497 | } */ *ap = v; |
| 3498 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3499 | |
| 3500 | /* |
| 3501 | * Set update flag. |
| 3502 | */ |
| 3503 | np->n_flag |= NUPD; |
| 3504 | getnanotime(&np->n_mtim); |
| 3505 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3506 | } |
| 3507 | |
| 3508 | /* |
| 3509 | * Close wrapper for fifos. |
| 3510 | * |
| 3511 | * Update the times on the nfsnode then do fifo close. |
| 3512 | */ |
| 3513 | int |
| 3514 | nfsfifo_close(void *v) |
| 3515 | { |
| 3516 | struct vop_close_args /* { |
| 3517 | struct vnode *a_vp; |
| 3518 | int a_fflag; |
| 3519 | kauth_cred_t a_cred; |
| 3520 | struct lwp *a_l; |
| 3521 | } */ *ap = v; |
| 3522 | struct vnode *vp = ap->a_vp; |
| 3523 | struct nfsnode *np = VTONFS(vp); |
| 3524 | struct vattr vattr; |
| 3525 | |
| 3526 | if (np->n_flag & (NACC | NUPD)) { |
| 3527 | struct timespec ts; |
| 3528 | |
| 3529 | getnanotime(&ts); |
| 3530 | if (np->n_flag & NACC) |
| 3531 | np->n_atim = ts; |
| 3532 | if (np->n_flag & NUPD) |
| 3533 | np->n_mtim = ts; |
| 3534 | np->n_flag |= NCHG; |
| 3535 | if (vp->v_usecount == 1 && |
| 3536 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3537 | vattr_null(&vattr); |
| 3538 | if (np->n_flag & NACC) |
| 3539 | vattr.va_atime = np->n_atim; |
| 3540 | if (np->n_flag & NUPD) |
| 3541 | vattr.va_mtime = np->n_mtim; |
| 3542 | (void)VOP_SETATTR(vp, &vattr, ap->a_cred); |
| 3543 | } |
| 3544 | } |
| 3545 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3546 | } |
| 3547 | |