| 1 | /* |
| 2 | * Copyright (c) 1989, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Rick Macklem at The University of Guelph. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the University of |
| 19 | * California, Berkeley and its contributors. |
| 20 | * 4. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 |
| 37 | * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $ |
| 38 | * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.22 2004/04/24 04:32:04 drhodus Exp $ |
| 39 | */ |
| 40 | |
| 41 | |
| 42 | /* |
| 43 | * vnode op calls for Sun NFS version 2 and 3 |
| 44 | */ |
| 45 | |
| 46 | #include "opt_inet.h" |
| 47 | |
| 48 | #include <sys/param.h> |
| 49 | #include <sys/kernel.h> |
| 50 | #include <sys/systm.h> |
| 51 | #include <sys/resourcevar.h> |
| 52 | #include <sys/proc.h> |
| 53 | #include <sys/mount.h> |
| 54 | #include <sys/buf.h> |
| 55 | #include <sys/malloc.h> |
| 56 | #include <sys/mbuf.h> |
| 57 | #include <sys/namei.h> |
| 58 | #include <sys/socket.h> |
| 59 | #include <sys/vnode.h> |
| 60 | #include <sys/dirent.h> |
| 61 | #include <sys/fcntl.h> |
| 62 | #include <sys/lockf.h> |
| 63 | #include <sys/stat.h> |
| 64 | #include <sys/sysctl.h> |
| 65 | #include <sys/conf.h> |
| 66 | |
| 67 | #include <vm/vm.h> |
| 68 | #include <vm/vm_extern.h> |
| 69 | #include <vm/vm_zone.h> |
| 70 | |
| 71 | #include <sys/buf2.h> |
| 72 | |
| 73 | #include <vfs/fifofs/fifo.h> |
| 74 | |
| 75 | #include "rpcv2.h" |
| 76 | #include "nfsproto.h" |
| 77 | #include "nfs.h" |
| 78 | #include "nfsmount.h" |
| 79 | #include "nfsnode.h" |
| 80 | #include "xdr_subs.h" |
| 81 | #include "nfsm_subs.h" |
| 82 | #include "nqnfs.h" |
| 83 | |
| 84 | #include <net/if.h> |
| 85 | #include <netinet/in.h> |
| 86 | #include <netinet/in_var.h> |
| 87 | |
| 88 | /* Defs */ |
| 89 | #define TRUE 1 |
| 90 | #define FALSE 0 |
| 91 | |
| 92 | /* |
| 93 | * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these |
| 94 | * calls are not in getblk() and brelse() so that they would not be necessary |
| 95 | * here. |
| 96 | */ |
| 97 | #ifndef B_VMIO |
| 98 | #define vfs_busy_pages(bp, f) |
| 99 | #endif |
| 100 | |
| 101 | static int nfsspec_read (struct vop_read_args *); |
| 102 | static int nfsspec_write (struct vop_write_args *); |
| 103 | static int nfsfifo_read (struct vop_read_args *); |
| 104 | static int nfsfifo_write (struct vop_write_args *); |
| 105 | static int nfsspec_close (struct vop_close_args *); |
| 106 | static int nfsfifo_close (struct vop_close_args *); |
| 107 | #define nfs_poll vop_nopoll |
| 108 | static int nfs_flush (struct vnode *,int,struct thread *,int); |
| 109 | static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *); |
| 110 | static int nfs_lookup (struct vop_lookup_args *); |
| 111 | static int nfs_create (struct vop_create_args *); |
| 112 | static int nfs_mknod (struct vop_mknod_args *); |
| 113 | static int nfs_open (struct vop_open_args *); |
| 114 | static int nfs_close (struct vop_close_args *); |
| 115 | static int nfs_access (struct vop_access_args *); |
| 116 | static int nfs_getattr (struct vop_getattr_args *); |
| 117 | static int nfs_setattr (struct vop_setattr_args *); |
| 118 | static int nfs_read (struct vop_read_args *); |
| 119 | static int nfs_mmap (struct vop_mmap_args *); |
| 120 | static int nfs_fsync (struct vop_fsync_args *); |
| 121 | static int nfs_remove (struct vop_remove_args *); |
| 122 | static int nfs_link (struct vop_link_args *); |
| 123 | static int nfs_rename (struct vop_rename_args *); |
| 124 | static int nfs_mkdir (struct vop_mkdir_args *); |
| 125 | static int nfs_rmdir (struct vop_rmdir_args *); |
| 126 | static int nfs_symlink (struct vop_symlink_args *); |
| 127 | static int nfs_readdir (struct vop_readdir_args *); |
| 128 | static int nfs_bmap (struct vop_bmap_args *); |
| 129 | static int nfs_strategy (struct vop_strategy_args *); |
| 130 | static int nfs_lookitup (struct vnode *, const char *, int, |
| 131 | struct ucred *, struct thread *, struct nfsnode **); |
| 132 | static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *); |
| 133 | static int nfsspec_access (struct vop_access_args *); |
| 134 | static int nfs_readlink (struct vop_readlink_args *); |
| 135 | static int nfs_print (struct vop_print_args *); |
| 136 | static int nfs_advlock (struct vop_advlock_args *); |
| 137 | static int nfs_bwrite (struct vop_bwrite_args *); |
| 138 | /* |
| 139 | * Global vfs data structures for nfs |
| 140 | */ |
| 141 | vop_t **nfsv2_vnodeop_p; |
| 142 | static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { |
| 143 | { &vop_default_desc, (vop_t *) vop_defaultop }, |
| 144 | { &vop_access_desc, (vop_t *) nfs_access }, |
| 145 | { &vop_advlock_desc, (vop_t *) nfs_advlock }, |
| 146 | { &vop_bmap_desc, (vop_t *) nfs_bmap }, |
| 147 | { &vop_bwrite_desc, (vop_t *) nfs_bwrite }, |
| 148 | { &vop_close_desc, (vop_t *) nfs_close }, |
| 149 | { &vop_create_desc, (vop_t *) nfs_create }, |
| 150 | { &vop_fsync_desc, (vop_t *) nfs_fsync }, |
| 151 | { &vop_getattr_desc, (vop_t *) nfs_getattr }, |
| 152 | { &vop_getpages_desc, (vop_t *) nfs_getpages }, |
| 153 | { &vop_putpages_desc, (vop_t *) nfs_putpages }, |
| 154 | { &vop_inactive_desc, (vop_t *) nfs_inactive }, |
| 155 | { &vop_islocked_desc, (vop_t *) vop_stdislocked }, |
| 156 | { &vop_lease_desc, (vop_t *) vop_null }, |
| 157 | { &vop_link_desc, (vop_t *) nfs_link }, |
| 158 | { &vop_lock_desc, (vop_t *) vop_sharedlock }, |
| 159 | { &vop_lookup_desc, (vop_t *) nfs_lookup }, |
| 160 | { &vop_mkdir_desc, (vop_t *) nfs_mkdir }, |
| 161 | { &vop_mknod_desc, (vop_t *) nfs_mknod }, |
| 162 | { &vop_mmap_desc, (vop_t *) nfs_mmap }, |
| 163 | { &vop_open_desc, (vop_t *) nfs_open }, |
| 164 | { &vop_poll_desc, (vop_t *) nfs_poll }, |
| 165 | { &vop_print_desc, (vop_t *) nfs_print }, |
| 166 | { &vop_read_desc, (vop_t *) nfs_read }, |
| 167 | { &vop_readdir_desc, (vop_t *) nfs_readdir }, |
| 168 | { &vop_readlink_desc, (vop_t *) nfs_readlink }, |
| 169 | { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, |
| 170 | { &vop_remove_desc, (vop_t *) nfs_remove }, |
| 171 | { &vop_rename_desc, (vop_t *) nfs_rename }, |
| 172 | { &vop_rmdir_desc, (vop_t *) nfs_rmdir }, |
| 173 | { &vop_setattr_desc, (vop_t *) nfs_setattr }, |
| 174 | { &vop_strategy_desc, (vop_t *) nfs_strategy }, |
| 175 | { &vop_symlink_desc, (vop_t *) nfs_symlink }, |
| 176 | { &vop_unlock_desc, (vop_t *) vop_stdunlock }, |
| 177 | { &vop_write_desc, (vop_t *) nfs_write }, |
| 178 | { NULL, NULL } |
| 179 | }; |
| 180 | static struct vnodeopv_desc nfsv2_vnodeop_opv_desc = |
| 181 | { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; |
| 182 | VNODEOP_SET(nfsv2_vnodeop_opv_desc); |
| 183 | |
| 184 | /* |
| 185 | * Special device vnode ops |
| 186 | */ |
| 187 | vop_t **spec_nfsv2nodeop_p; |
| 188 | static struct vnodeopv_entry_desc nfsv2_specop_entries[] = { |
| 189 | { &vop_default_desc, (vop_t *) spec_vnoperate }, |
| 190 | { &vop_access_desc, (vop_t *) nfsspec_access }, |
| 191 | { &vop_close_desc, (vop_t *) nfsspec_close }, |
| 192 | { &vop_fsync_desc, (vop_t *) nfs_fsync }, |
| 193 | { &vop_getattr_desc, (vop_t *) nfs_getattr }, |
| 194 | { &vop_inactive_desc, (vop_t *) nfs_inactive }, |
| 195 | { &vop_islocked_desc, (vop_t *) vop_stdislocked }, |
| 196 | { &vop_lock_desc, (vop_t *) vop_sharedlock }, |
| 197 | { &vop_print_desc, (vop_t *) nfs_print }, |
| 198 | { &vop_read_desc, (vop_t *) nfsspec_read }, |
| 199 | { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, |
| 200 | { &vop_setattr_desc, (vop_t *) nfs_setattr }, |
| 201 | { &vop_unlock_desc, (vop_t *) vop_stdunlock }, |
| 202 | { &vop_write_desc, (vop_t *) nfsspec_write }, |
| 203 | { NULL, NULL } |
| 204 | }; |
| 205 | static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = |
| 206 | { &spec_nfsv2nodeop_p, nfsv2_specop_entries }; |
| 207 | VNODEOP_SET(spec_nfsv2nodeop_opv_desc); |
| 208 | |
| 209 | vop_t **fifo_nfsv2nodeop_p; |
| 210 | static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = { |
| 211 | { &vop_default_desc, (vop_t *) fifo_vnoperate }, |
| 212 | { &vop_access_desc, (vop_t *) nfsspec_access }, |
| 213 | { &vop_close_desc, (vop_t *) nfsfifo_close }, |
| 214 | { &vop_fsync_desc, (vop_t *) nfs_fsync }, |
| 215 | { &vop_getattr_desc, (vop_t *) nfs_getattr }, |
| 216 | { &vop_inactive_desc, (vop_t *) nfs_inactive }, |
| 217 | { &vop_islocked_desc, (vop_t *) vop_stdislocked }, |
| 218 | { &vop_lock_desc, (vop_t *) vop_sharedlock }, |
| 219 | { &vop_print_desc, (vop_t *) nfs_print }, |
| 220 | { &vop_read_desc, (vop_t *) nfsfifo_read }, |
| 221 | { &vop_reclaim_desc, (vop_t *) nfs_reclaim }, |
| 222 | { &vop_setattr_desc, (vop_t *) nfs_setattr }, |
| 223 | { &vop_unlock_desc, (vop_t *) vop_stdunlock }, |
| 224 | { &vop_write_desc, (vop_t *) nfsfifo_write }, |
| 225 | { NULL, NULL } |
| 226 | }; |
| 227 | static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = |
| 228 | { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries }; |
| 229 | VNODEOP_SET(fifo_nfsv2nodeop_opv_desc); |
| 230 | |
| 231 | static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp, |
| 232 | struct componentname *cnp, |
| 233 | struct vattr *vap); |
| 234 | static int nfs_removerpc (struct vnode *dvp, const char *name, |
| 235 | int namelen, |
| 236 | struct ucred *cred, struct thread *td); |
| 237 | static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr, |
| 238 | int fnamelen, struct vnode *tdvp, |
| 239 | const char *tnameptr, int tnamelen, |
| 240 | struct ucred *cred, struct thread *td); |
| 241 | static int nfs_renameit (struct vnode *sdvp, |
| 242 | struct componentname *scnp, |
| 243 | struct sillyrename *sp); |
| 244 | |
| 245 | /* |
| 246 | * Global variables |
| 247 | */ |
| 248 | extern u_int32_t nfs_true, nfs_false; |
| 249 | extern u_int32_t nfs_xdrneg1; |
| 250 | extern struct nfsstats nfsstats; |
| 251 | extern nfstype nfsv3_type[9]; |
| 252 | struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON]; |
| 253 | struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; |
| 254 | int nfs_numasync = 0; |
| 255 | #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) |
| 256 | |
| 257 | SYSCTL_DECL(_vfs_nfs); |
| 258 | |
| 259 | static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; |
| 260 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, |
| 261 | &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); |
| 262 | |
| 263 | static int nfsneg_cache_timeout = NFS_MINATTRTIMO; |
| 264 | SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW, |
| 265 | &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout"); |
| 266 | |
| 267 | static int nfsv3_commit_on_close = 0; |
| 268 | SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, |
| 269 | &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); |
| 270 | #if 0 |
| 271 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, |
| 272 | &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); |
| 273 | |
| 274 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, |
| 275 | &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); |
| 276 | #endif |
| 277 | |
| 278 | #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ |
| 279 | | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ |
| 280 | | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP) |
| 281 | static int |
| 282 | nfs3_access_otw(struct vnode *vp, int wmode, |
| 283 | struct thread *td, struct ucred *cred) |
| 284 | { |
| 285 | const int v3 = 1; |
| 286 | u_int32_t *tl; |
| 287 | int error = 0, attrflag; |
| 288 | |
| 289 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 290 | caddr_t bpos, dpos, cp2; |
| 291 | int32_t t1, t2; |
| 292 | caddr_t cp; |
| 293 | u_int32_t rmode; |
| 294 | struct nfsnode *np = VTONFS(vp); |
| 295 | |
| 296 | nfsstats.rpccnt[NFSPROC_ACCESS]++; |
| 297 | nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); |
| 298 | nfsm_fhtom(vp, v3); |
| 299 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 300 | *tl = txdr_unsigned(wmode); |
| 301 | nfsm_request(vp, NFSPROC_ACCESS, td, cred); |
| 302 | nfsm_postop_attr(vp, attrflag); |
| 303 | if (!error) { |
| 304 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 305 | rmode = fxdr_unsigned(u_int32_t, *tl); |
| 306 | np->n_mode = rmode; |
| 307 | np->n_modeuid = cred->cr_uid; |
| 308 | np->n_modestamp = mycpu->gd_time_seconds; |
| 309 | } |
| 310 | m_freem(mrep); |
| 311 | nfsmout: |
| 312 | return error; |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * nfs access vnode op. |
| 317 | * For nfs version 2, just return ok. File accesses may fail later. |
| 318 | * For nfs version 3, use the access rpc to check accessibility. If file modes |
| 319 | * are changed on the server, accesses might still fail later. |
| 320 | * |
| 321 | * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 322 | * struct thread *a_td) |
| 323 | */ |
| 324 | static int |
| 325 | nfs_access(struct vop_access_args *ap) |
| 326 | { |
| 327 | struct vnode *vp = ap->a_vp; |
| 328 | int error = 0; |
| 329 | u_int32_t mode, wmode; |
| 330 | int v3 = NFS_ISV3(vp); |
| 331 | struct nfsnode *np = VTONFS(vp); |
| 332 | |
| 333 | /* |
| 334 | * Disallow write attempts on filesystems mounted read-only; |
| 335 | * unless the file is a socket, fifo, or a block or character |
| 336 | * device resident on the filesystem. |
| 337 | */ |
| 338 | if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 339 | switch (vp->v_type) { |
| 340 | case VREG: |
| 341 | case VDIR: |
| 342 | case VLNK: |
| 343 | return (EROFS); |
| 344 | default: |
| 345 | break; |
| 346 | } |
| 347 | } |
| 348 | /* |
| 349 | * For nfs v3, check to see if we have done this recently, and if |
| 350 | * so return our cached result instead of making an ACCESS call. |
| 351 | * If not, do an access rpc, otherwise you are stuck emulating |
| 352 | * ufs_access() locally using the vattr. This may not be correct, |
| 353 | * since the server may apply other access criteria such as |
| 354 | * client uid-->server uid mapping that we do not know about. |
| 355 | */ |
| 356 | if (v3) { |
| 357 | if (ap->a_mode & VREAD) |
| 358 | mode = NFSV3ACCESS_READ; |
| 359 | else |
| 360 | mode = 0; |
| 361 | if (vp->v_type != VDIR) { |
| 362 | if (ap->a_mode & VWRITE) |
| 363 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); |
| 364 | if (ap->a_mode & VEXEC) |
| 365 | mode |= NFSV3ACCESS_EXECUTE; |
| 366 | } else { |
| 367 | if (ap->a_mode & VWRITE) |
| 368 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | |
| 369 | NFSV3ACCESS_DELETE); |
| 370 | if (ap->a_mode & VEXEC) |
| 371 | mode |= NFSV3ACCESS_LOOKUP; |
| 372 | } |
| 373 | /* XXX safety belt, only make blanket request if caching */ |
| 374 | if (nfsaccess_cache_timeout > 0) { |
| 375 | wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | |
| 376 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | |
| 377 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; |
| 378 | } else { |
| 379 | wmode = mode; |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * Does our cached result allow us to give a definite yes to |
| 384 | * this request? |
| 385 | */ |
| 386 | if ((mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) && |
| 387 | (ap->a_cred->cr_uid == np->n_modeuid) && |
| 388 | ((np->n_mode & mode) == mode)) { |
| 389 | nfsstats.accesscache_hits++; |
| 390 | } else { |
| 391 | /* |
| 392 | * Either a no, or a don't know. Go to the wire. |
| 393 | */ |
| 394 | nfsstats.accesscache_misses++; |
| 395 | error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred); |
| 396 | if (!error) { |
| 397 | if ((np->n_mode & mode) != mode) { |
| 398 | error = EACCES; |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | } else { |
| 403 | if ((error = nfsspec_access(ap)) != 0) |
| 404 | return (error); |
| 405 | |
| 406 | /* |
| 407 | * Attempt to prevent a mapped root from accessing a file |
| 408 | * which it shouldn't. We try to read a byte from the file |
| 409 | * if the user is root and the file is not zero length. |
| 410 | * After calling nfsspec_access, we should have the correct |
| 411 | * file size cached. |
| 412 | */ |
| 413 | if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD) |
| 414 | && VTONFS(vp)->n_size > 0) { |
| 415 | struct iovec aiov; |
| 416 | struct uio auio; |
| 417 | char buf[1]; |
| 418 | |
| 419 | aiov.iov_base = buf; |
| 420 | aiov.iov_len = 1; |
| 421 | auio.uio_iov = &aiov; |
| 422 | auio.uio_iovcnt = 1; |
| 423 | auio.uio_offset = 0; |
| 424 | auio.uio_resid = 1; |
| 425 | auio.uio_segflg = UIO_SYSSPACE; |
| 426 | auio.uio_rw = UIO_READ; |
| 427 | auio.uio_td = ap->a_td; |
| 428 | |
| 429 | if (vp->v_type == VREG) { |
| 430 | error = nfs_readrpc(vp, &auio); |
| 431 | } else if (vp->v_type == VDIR) { |
| 432 | char* bp; |
| 433 | bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); |
| 434 | aiov.iov_base = bp; |
| 435 | aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; |
| 436 | error = nfs_readdirrpc(vp, &auio); |
| 437 | free(bp, M_TEMP); |
| 438 | } else if (vp->v_type == VLNK) { |
| 439 | error = nfs_readlinkrpc(vp, &auio); |
| 440 | } else { |
| 441 | error = EACCES; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | /* |
| 446 | * [re]record creds for reading and/or writing if access |
| 447 | * was granted. Assume the NFS server will grant read access |
| 448 | * for execute requests. |
| 449 | */ |
| 450 | if (error == 0) { |
| 451 | if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) { |
| 452 | crhold(ap->a_cred); |
| 453 | if (np->n_rucred) |
| 454 | crfree(np->n_rucred); |
| 455 | np->n_rucred = ap->a_cred; |
| 456 | } |
| 457 | if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) { |
| 458 | crhold(ap->a_cred); |
| 459 | if (np->n_wucred) |
| 460 | crfree(np->n_wucred); |
| 461 | np->n_wucred = ap->a_cred; |
| 462 | } |
| 463 | } |
| 464 | return(error); |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * nfs open vnode op |
| 469 | * Check to see if the type is ok |
| 470 | * and that deletion is not in progress. |
| 471 | * For paged in text files, you will need to flush the page cache |
| 472 | * if consistency is lost. |
| 473 | * |
| 474 | * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 475 | * struct thread *a_td) |
| 476 | */ |
| 477 | /* ARGSUSED */ |
| 478 | static int |
| 479 | nfs_open(struct vop_open_args *ap) |
| 480 | { |
| 481 | struct vnode *vp = ap->a_vp; |
| 482 | struct nfsnode *np = VTONFS(vp); |
| 483 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 484 | struct vattr vattr; |
| 485 | int error; |
| 486 | |
| 487 | if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { |
| 488 | #ifdef DIAGNOSTIC |
| 489 | printf("open eacces vtyp=%d\n",vp->v_type); |
| 490 | #endif |
| 491 | return (EOPNOTSUPP); |
| 492 | } |
| 493 | /* |
| 494 | * Get a valid lease. If cached data is stale, flush it. |
| 495 | */ |
| 496 | if (nmp->nm_flag & NFSMNT_NQNFS) { |
| 497 | if (NQNFS_CKINVALID(vp, np, ND_READ)) { |
| 498 | do { |
| 499 | error = nqnfs_getlease(vp, ND_READ, ap->a_td); |
| 500 | } while (error == NQNFS_EXPIRED); |
| 501 | if (error) |
| 502 | return (error); |
| 503 | if (np->n_lrev != np->n_brev || |
| 504 | (np->n_flag & NQNFSNONCACHE)) { |
| 505 | if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) |
| 506 | == EINTR) { |
| 507 | return (error); |
| 508 | } |
| 509 | np->n_brev = np->n_lrev; |
| 510 | } |
| 511 | } |
| 512 | } else { |
| 513 | if (np->n_flag & NMODIFIED) { |
| 514 | if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) |
| 515 | == EINTR) { |
| 516 | return (error); |
| 517 | } |
| 518 | np->n_attrstamp = 0; |
| 519 | if (vp->v_type == VDIR) |
| 520 | np->n_direofoffset = 0; |
| 521 | error = VOP_GETATTR(vp, &vattr, ap->a_td); |
| 522 | if (error) |
| 523 | return (error); |
| 524 | np->n_mtime = vattr.va_mtime.tv_sec; |
| 525 | } else { |
| 526 | error = VOP_GETATTR(vp, &vattr, ap->a_td); |
| 527 | if (error) |
| 528 | return (error); |
| 529 | if (np->n_mtime != vattr.va_mtime.tv_sec) { |
| 530 | if (vp->v_type == VDIR) |
| 531 | np->n_direofoffset = 0; |
| 532 | if ((error = nfs_vinvalbuf(vp, V_SAVE, |
| 533 | ap->a_td, 1)) == EINTR) { |
| 534 | return (error); |
| 535 | } |
| 536 | np->n_mtime = vattr.va_mtime.tv_sec; |
| 537 | } |
| 538 | } |
| 539 | } |
| 540 | if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) |
| 541 | np->n_attrstamp = 0; /* For Open/Close consistency */ |
| 542 | return (0); |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * nfs close vnode op |
| 547 | * What an NFS client should do upon close after writing is a debatable issue. |
| 548 | * Most NFS clients push delayed writes to the server upon close, basically for |
| 549 | * two reasons: |
| 550 | * 1 - So that any write errors may be reported back to the client process |
| 551 | * doing the close system call. By far the two most likely errors are |
| 552 | * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. |
| 553 | * 2 - To put a worst case upper bound on cache inconsistency between |
| 554 | * multiple clients for the file. |
| 555 | * There is also a consistency problem for Version 2 of the protocol w.r.t. |
| 556 | * not being able to tell if other clients are writing a file concurrently, |
| 557 | * since there is no way of knowing if the changed modify time in the reply |
| 558 | * is only due to the write for this client. |
| 559 | * (NFS Version 3 provides weak cache consistency data in the reply that |
| 560 | * should be sufficient to detect and handle this case.) |
| 561 | * |
| 562 | * The current code does the following: |
| 563 | * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers |
| 564 | * for NFS Version 3 - flush dirty buffers to the server but don't invalidate |
| 565 | * or commit them (this satisfies 1 and 2 except for the |
| 566 | * case where the server crashes after this close but |
| 567 | * before the commit RPC, which is felt to be "good |
| 568 | * enough". Changing the last argument to nfs_flush() to |
| 569 | * a 1 would force a commit operation, if it is felt a |
| 570 | * commit is necessary now. |
| 571 | * for NQNFS - do nothing now, since 2 is dealt with via leases and |
| 572 | * 1 should be dealt with via an fsync() system call for |
| 573 | * cases where write errors are important. |
| 574 | * |
| 575 | * nfs_close(struct vnodeop_desc *a_desc, struct vnode *a_vp, int a_fflag, |
| 576 | * struct ucred *a_cred, struct thread *a_td) |
| 577 | */ |
| 578 | /* ARGSUSED */ |
| 579 | static int |
| 580 | nfs_close(struct vop_close_args *ap) |
| 581 | { |
| 582 | struct vnode *vp = ap->a_vp; |
| 583 | struct nfsnode *np = VTONFS(vp); |
| 584 | int error = 0; |
| 585 | |
| 586 | if (vp->v_type == VREG) { |
| 587 | if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && |
| 588 | (np->n_flag & NMODIFIED)) { |
| 589 | if (NFS_ISV3(vp)) { |
| 590 | /* |
| 591 | * Under NFSv3 we have dirty buffers to dispose of. We |
| 592 | * must flush them to the NFS server. We have the option |
| 593 | * of waiting all the way through the commit rpc or just |
| 594 | * waiting for the initial write. The default is to only |
| 595 | * wait through the initial write so the data is in the |
| 596 | * server's cache, which is roughly similar to the state |
| 597 | * a standard disk subsystem leaves the file in on close(). |
| 598 | * |
| 599 | * We cannot clear the NMODIFIED bit in np->n_flag due to |
| 600 | * potential races with other processes, and certainly |
| 601 | * cannot clear it if we don't commit. |
| 602 | */ |
| 603 | int cm = nfsv3_commit_on_close ? 1 : 0; |
| 604 | error = nfs_flush(vp, MNT_WAIT, ap->a_td, cm); |
| 605 | /* np->n_flag &= ~NMODIFIED; */ |
| 606 | } else { |
| 607 | error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); |
| 608 | } |
| 609 | np->n_attrstamp = 0; |
| 610 | } |
| 611 | if (np->n_flag & NWRITEERR) { |
| 612 | np->n_flag &= ~NWRITEERR; |
| 613 | error = np->n_error; |
| 614 | } |
| 615 | } |
| 616 | return (error); |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * nfs getattr call from vfs. |
| 621 | * |
| 622 | * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred, |
| 623 | * struct thread *a_td) |
| 624 | */ |
| 625 | static int |
| 626 | nfs_getattr(struct vop_getattr_args *ap) |
| 627 | { |
| 628 | struct vnode *vp = ap->a_vp; |
| 629 | struct nfsnode *np = VTONFS(vp); |
| 630 | caddr_t cp; |
| 631 | u_int32_t *tl; |
| 632 | int32_t t1, t2; |
| 633 | caddr_t bpos, dpos; |
| 634 | int error = 0; |
| 635 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 636 | int v3 = NFS_ISV3(vp); |
| 637 | |
| 638 | /* |
| 639 | * Update local times for special files. |
| 640 | */ |
| 641 | if (np->n_flag & (NACC | NUPD)) |
| 642 | np->n_flag |= NCHG; |
| 643 | /* |
| 644 | * First look in the cache. |
| 645 | */ |
| 646 | if (nfs_getattrcache(vp, ap->a_vap) == 0) |
| 647 | return (0); |
| 648 | |
| 649 | if (v3 && nfsaccess_cache_timeout > 0) { |
| 650 | nfsstats.accesscache_misses++; |
| 651 | nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, nfs_vpcred(vp, ND_CHECK)); |
| 652 | if (nfs_getattrcache(vp, ap->a_vap) == 0) |
| 653 | return (0); |
| 654 | } |
| 655 | |
| 656 | nfsstats.rpccnt[NFSPROC_GETATTR]++; |
| 657 | nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); |
| 658 | nfsm_fhtom(vp, v3); |
| 659 | nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, nfs_vpcred(vp, ND_CHECK)); |
| 660 | if (!error) { |
| 661 | nfsm_loadattr(vp, ap->a_vap); |
| 662 | } |
| 663 | m_freem(mrep); |
| 664 | nfsmout: |
| 665 | return (error); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * nfs setattr call. |
| 670 | * |
| 671 | * nfs_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp, |
| 672 | * struct vattr *a_vap, struct ucred *a_cred, |
| 673 | * struct thread *a_td) |
| 674 | */ |
| 675 | static int |
| 676 | nfs_setattr(struct vop_setattr_args *ap) |
| 677 | { |
| 678 | struct vnode *vp = ap->a_vp; |
| 679 | struct nfsnode *np = VTONFS(vp); |
| 680 | struct vattr *vap = ap->a_vap; |
| 681 | int error = 0; |
| 682 | u_quad_t tsize; |
| 683 | |
| 684 | #ifndef nolint |
| 685 | tsize = (u_quad_t)0; |
| 686 | #endif |
| 687 | |
| 688 | /* |
| 689 | * Setting of flags is not supported. |
| 690 | */ |
| 691 | if (vap->va_flags != VNOVAL) |
| 692 | return (EOPNOTSUPP); |
| 693 | |
| 694 | /* |
| 695 | * Disallow write attempts if the filesystem is mounted read-only. |
| 696 | */ |
| 697 | if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || |
| 698 | vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || |
| 699 | vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && |
| 700 | (vp->v_mount->mnt_flag & MNT_RDONLY)) |
| 701 | return (EROFS); |
| 702 | if (vap->va_size != VNOVAL) { |
| 703 | switch (vp->v_type) { |
| 704 | case VDIR: |
| 705 | return (EISDIR); |
| 706 | case VCHR: |
| 707 | case VBLK: |
| 708 | case VSOCK: |
| 709 | case VFIFO: |
| 710 | if (vap->va_mtime.tv_sec == VNOVAL && |
| 711 | vap->va_atime.tv_sec == VNOVAL && |
| 712 | vap->va_mode == (mode_t)VNOVAL && |
| 713 | vap->va_uid == (uid_t)VNOVAL && |
| 714 | vap->va_gid == (gid_t)VNOVAL) |
| 715 | return (0); |
| 716 | vap->va_size = VNOVAL; |
| 717 | break; |
| 718 | default: |
| 719 | /* |
| 720 | * Disallow write attempts if the filesystem is |
| 721 | * mounted read-only. |
| 722 | */ |
| 723 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 724 | return (EROFS); |
| 725 | |
| 726 | /* |
| 727 | * We run vnode_pager_setsize() early (why?), |
| 728 | * we must set np->n_size now to avoid vinvalbuf |
| 729 | * V_SAVE races that might setsize a lower |
| 730 | * value. |
| 731 | */ |
| 732 | |
| 733 | tsize = np->n_size; |
| 734 | error = nfs_meta_setsize(vp, ap->a_td, vap->va_size); |
| 735 | |
| 736 | if (np->n_flag & NMODIFIED) { |
| 737 | if (vap->va_size == 0) |
| 738 | error = nfs_vinvalbuf(vp, 0, ap->a_td, 1); |
| 739 | else |
| 740 | error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); |
| 741 | if (error) { |
| 742 | np->n_size = tsize; |
| 743 | vnode_pager_setsize(vp, np->n_size); |
| 744 | return (error); |
| 745 | } |
| 746 | } |
| 747 | /* np->n_size has already been set to vap->va_size |
| 748 | * in nfs_meta_setsize(). We must set it again since |
| 749 | * nfs_loadattrcache() could be called through |
| 750 | * nfs_meta_setsize() and could modify np->n_size. |
| 751 | */ |
| 752 | np->n_vattr.va_size = np->n_size = vap->va_size; |
| 753 | }; |
| 754 | } else if ((vap->va_mtime.tv_sec != VNOVAL || |
| 755 | vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) && |
| 756 | vp->v_type == VREG && |
| 757 | (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR) |
| 758 | return (error); |
| 759 | error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td); |
| 760 | if (error && vap->va_size != VNOVAL) { |
| 761 | np->n_size = np->n_vattr.va_size = tsize; |
| 762 | vnode_pager_setsize(vp, np->n_size); |
| 763 | } |
| 764 | return (error); |
| 765 | } |
| 766 | |
| 767 | /* |
| 768 | * Do an nfs setattr rpc. |
| 769 | */ |
| 770 | static int |
| 771 | nfs_setattrrpc(struct vnode *vp, struct vattr *vap, |
| 772 | struct ucred *cred, struct thread *td) |
| 773 | { |
| 774 | struct nfsv2_sattr *sp; |
| 775 | caddr_t cp; |
| 776 | int32_t t1, t2; |
| 777 | caddr_t bpos, dpos, cp2; |
| 778 | u_int32_t *tl; |
| 779 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 780 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 781 | int v3 = NFS_ISV3(vp); |
| 782 | |
| 783 | nfsstats.rpccnt[NFSPROC_SETATTR]++; |
| 784 | nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); |
| 785 | nfsm_fhtom(vp, v3); |
| 786 | if (v3) { |
| 787 | nfsm_v3attrbuild(vap, TRUE); |
| 788 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 789 | *tl = nfs_false; |
| 790 | } else { |
| 791 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 792 | if (vap->va_mode == (mode_t)VNOVAL) |
| 793 | sp->sa_mode = nfs_xdrneg1; |
| 794 | else |
| 795 | sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); |
| 796 | if (vap->va_uid == (uid_t)VNOVAL) |
| 797 | sp->sa_uid = nfs_xdrneg1; |
| 798 | else |
| 799 | sp->sa_uid = txdr_unsigned(vap->va_uid); |
| 800 | if (vap->va_gid == (gid_t)VNOVAL) |
| 801 | sp->sa_gid = nfs_xdrneg1; |
| 802 | else |
| 803 | sp->sa_gid = txdr_unsigned(vap->va_gid); |
| 804 | sp->sa_size = txdr_unsigned(vap->va_size); |
| 805 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 806 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 807 | } |
| 808 | nfsm_request(vp, NFSPROC_SETATTR, td, cred); |
| 809 | if (v3) { |
| 810 | nfsm_wcc_data(vp, wccflag); |
| 811 | } else |
| 812 | nfsm_loadattr(vp, (struct vattr *)0); |
| 813 | m_freem(mrep); |
| 814 | nfsmout: |
| 815 | return (error); |
| 816 | } |
| 817 | |
| 818 | /* |
| 819 | * 'cached' nfs directory lookup |
| 820 | * |
| 821 | * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp, |
| 822 | * struct vnode **a_vpp, struct componentname *a_cnp) |
| 823 | */ |
| 824 | static int |
| 825 | nfs_lookup(struct vop_lookup_args *ap) |
| 826 | { |
| 827 | struct componentname *cnp = ap->a_cnp; |
| 828 | struct vnode *dvp = ap->a_dvp; |
| 829 | struct vnode **vpp = ap->a_vpp; |
| 830 | int flags = cnp->cn_flags; |
| 831 | struct vnode *newvp; |
| 832 | u_int32_t *tl; |
| 833 | caddr_t cp; |
| 834 | int32_t t1, t2; |
| 835 | struct nfsmount *nmp; |
| 836 | caddr_t bpos, dpos, cp2; |
| 837 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 838 | long len; |
| 839 | nfsfh_t *fhp; |
| 840 | struct nfsnode *np; |
| 841 | int lockparent, wantparent, error = 0, attrflag, fhsize; |
| 842 | int v3 = NFS_ISV3(dvp); |
| 843 | struct thread *td = cnp->cn_td; |
| 844 | |
| 845 | /* |
| 846 | * Read-only mount check and directory check. |
| 847 | */ |
| 848 | *vpp = NULLVP; |
| 849 | if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && |
| 850 | (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) |
| 851 | return (EROFS); |
| 852 | |
| 853 | if (dvp->v_type != VDIR) |
| 854 | return (ENOTDIR); |
| 855 | |
| 856 | /* |
| 857 | * Look it up in the cache. Note that ENOENT is only returned if we |
| 858 | * previously entered a negative hit (see later on). The additional |
| 859 | * nfsneg_cache_timeout check causes previously cached results to |
| 860 | * be instantly ignored if the negative caching is turned off. |
| 861 | */ |
| 862 | lockparent = flags & CNP_LOCKPARENT; |
| 863 | wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); |
| 864 | nmp = VFSTONFS(dvp->v_mount); |
| 865 | np = VTONFS(dvp); |
| 866 | error = cache_lookup(dvp, NCPNULL, vpp, NCPPNULL, cnp); |
| 867 | if (error != 0) { |
| 868 | struct vattr vattr; |
| 869 | int vpid; |
| 870 | |
| 871 | if (error == ENOENT && nfsneg_cache_timeout) { |
| 872 | *vpp = NULLVP; |
| 873 | return (error); |
| 874 | } |
| 875 | if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) { |
| 876 | *vpp = NULLVP; |
| 877 | return (error); |
| 878 | } |
| 879 | |
| 880 | newvp = *vpp; |
| 881 | vpid = newvp->v_id; |
| 882 | /* |
| 883 | * See the comment starting `Step through' in ufs/ufs_lookup.c |
| 884 | * for an explanation of the locking protocol |
| 885 | */ |
| 886 | if (dvp == newvp) { |
| 887 | vref(newvp); |
| 888 | error = 0; |
| 889 | } else if (flags & CNP_ISDOTDOT) { |
| 890 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 891 | error = vget(newvp, NULL, LK_EXCLUSIVE, td); |
| 892 | if (!error && lockparent && (flags & CNP_ISLASTCN)) |
| 893 | error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td); |
| 894 | } else { |
| 895 | error = vget(newvp, NULL, LK_EXCLUSIVE, td); |
| 896 | if (!lockparent || error || !(flags & CNP_ISLASTCN)) |
| 897 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 898 | } |
| 899 | if (!error) { |
| 900 | if (vpid == newvp->v_id) { |
| 901 | if (!VOP_GETATTR(newvp, &vattr, td) |
| 902 | && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { |
| 903 | nfsstats.lookupcache_hits++; |
| 904 | if (cnp->cn_nameiop != NAMEI_LOOKUP && |
| 905 | (flags & CNP_ISLASTCN)) |
| 906 | cnp->cn_flags |= CNP_SAVENAME; |
| 907 | return (0); |
| 908 | } |
| 909 | cache_purge(newvp); |
| 910 | } |
| 911 | vput(newvp); |
| 912 | if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN)) |
| 913 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 914 | } |
| 915 | error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td); |
| 916 | *vpp = NULLVP; |
| 917 | if (error) |
| 918 | return (error); |
| 919 | } |
| 920 | |
| 921 | /* |
| 922 | * Cache miss, go the wire. |
| 923 | */ |
| 924 | error = 0; |
| 925 | newvp = NULLVP; |
| 926 | nfsstats.lookupcache_misses++; |
| 927 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 928 | len = cnp->cn_namelen; |
| 929 | nfsm_reqhead(dvp, NFSPROC_LOOKUP, |
| 930 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 931 | nfsm_fhtom(dvp, v3); |
| 932 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 933 | nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred); |
| 934 | if (error) { |
| 935 | /* |
| 936 | * Cache negatve lookups to reduce NFS traffic, but use |
| 937 | * a fast timeout. |
| 938 | */ |
| 939 | if (error == ENOENT && |
| 940 | (cnp->cn_flags & CNP_MAKEENTRY) && |
| 941 | cnp->cn_nameiop == NAMEI_LOOKUP && |
| 942 | nfsneg_cache_timeout) { |
| 943 | int toval = nfsneg_cache_timeout * hz; |
| 944 | if (cnp->cn_flags & CNP_CACHETIMEOUT) { |
| 945 | if (cnp->cn_timeout > toval) |
| 946 | cnp->cn_timeout = toval; |
| 947 | } else { |
| 948 | cnp->cn_flags |= CNP_CACHETIMEOUT; |
| 949 | cnp->cn_timeout = toval; |
| 950 | } |
| 951 | cache_enter(dvp, NCPNULL, NULL, cnp); |
| 952 | } |
| 953 | nfsm_postop_attr(dvp, attrflag); |
| 954 | m_freem(mrep); |
| 955 | goto nfsmout; |
| 956 | } |
| 957 | nfsm_getfh(fhp, fhsize, v3); |
| 958 | |
| 959 | /* |
| 960 | * Handle RENAME case... |
| 961 | */ |
| 962 | if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) { |
| 963 | if (NFS_CMPFH(np, fhp, fhsize)) { |
| 964 | m_freem(mrep); |
| 965 | return (EISDIR); |
| 966 | } |
| 967 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 968 | if (error) { |
| 969 | m_freem(mrep); |
| 970 | return (error); |
| 971 | } |
| 972 | newvp = NFSTOV(np); |
| 973 | if (v3) { |
| 974 | nfsm_postop_attr(newvp, attrflag); |
| 975 | nfsm_postop_attr(dvp, attrflag); |
| 976 | } else |
| 977 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 978 | *vpp = newvp; |
| 979 | m_freem(mrep); |
| 980 | cnp->cn_flags |= CNP_SAVENAME; |
| 981 | if (!lockparent) |
| 982 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 983 | return (0); |
| 984 | } |
| 985 | |
| 986 | if (flags & CNP_ISDOTDOT) { |
| 987 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 988 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 989 | if (error) { |
| 990 | vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); |
| 991 | return (error); |
| 992 | } |
| 993 | newvp = NFSTOV(np); |
| 994 | if (lockparent && (flags & CNP_ISLASTCN) && |
| 995 | (error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td))) { |
| 996 | vput(newvp); |
| 997 | return (error); |
| 998 | } |
| 999 | } else if (NFS_CMPFH(np, fhp, fhsize)) { |
| 1000 | vref(dvp); |
| 1001 | newvp = dvp; |
| 1002 | } else { |
| 1003 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 1004 | if (error) { |
| 1005 | m_freem(mrep); |
| 1006 | return (error); |
| 1007 | } |
| 1008 | if (!lockparent || !(flags & CNP_ISLASTCN)) |
| 1009 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 1010 | newvp = NFSTOV(np); |
| 1011 | } |
| 1012 | if (v3) { |
| 1013 | nfsm_postop_attr(newvp, attrflag); |
| 1014 | nfsm_postop_attr(dvp, attrflag); |
| 1015 | } else |
| 1016 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 1017 | if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN)) |
| 1018 | cnp->cn_flags |= CNP_SAVENAME; |
| 1019 | if ((cnp->cn_flags & CNP_MAKEENTRY) && |
| 1020 | (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) { |
| 1021 | np->n_ctime = np->n_vattr.va_ctime.tv_sec; |
| 1022 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1023 | } |
| 1024 | *vpp = newvp; |
| 1025 | m_freem(mrep); |
| 1026 | nfsmout: |
| 1027 | if (error) { |
| 1028 | if (newvp != NULLVP) { |
| 1029 | vrele(newvp); |
| 1030 | *vpp = NULLVP; |
| 1031 | } |
| 1032 | if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) && |
| 1033 | (flags & CNP_ISLASTCN) && error == ENOENT) { |
| 1034 | if (!lockparent) |
| 1035 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 1036 | if (dvp->v_mount->mnt_flag & MNT_RDONLY) |
| 1037 | error = EROFS; |
| 1038 | else |
| 1039 | error = EJUSTRETURN; |
| 1040 | } |
| 1041 | if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN)) |
| 1042 | cnp->cn_flags |= CNP_SAVENAME; |
| 1043 | } |
| 1044 | return (error); |
| 1045 | } |
| 1046 | |
| 1047 | /* |
| 1048 | * nfs read call. |
| 1049 | * Just call nfs_bioread() to do the work. |
| 1050 | * |
| 1051 | * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1052 | * struct ucred *a_cred) |
| 1053 | */ |
| 1054 | static int |
| 1055 | nfs_read(struct vop_read_args *ap) |
| 1056 | { |
| 1057 | struct vnode *vp = ap->a_vp; |
| 1058 | |
| 1059 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag)); |
| 1060 | switch (vp->v_type) { |
| 1061 | case VREG: |
| 1062 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag)); |
| 1063 | case VDIR: |
| 1064 | return (EISDIR); |
| 1065 | default: |
| 1066 | return EOPNOTSUPP; |
| 1067 | } |
| 1068 | } |
| 1069 | |
| 1070 | /* |
| 1071 | * nfs readlink call |
| 1072 | * |
| 1073 | * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) |
| 1074 | */ |
| 1075 | static int |
| 1076 | nfs_readlink(struct vop_readlink_args *ap) |
| 1077 | { |
| 1078 | struct vnode *vp = ap->a_vp; |
| 1079 | |
| 1080 | if (vp->v_type != VLNK) |
| 1081 | return (EINVAL); |
| 1082 | return (nfs_bioread(vp, ap->a_uio, 0)); |
| 1083 | } |
| 1084 | |
| 1085 | /* |
| 1086 | * Do a readlink rpc. |
| 1087 | * Called by nfs_doio() from below the buffer cache. |
| 1088 | */ |
| 1089 | int |
| 1090 | nfs_readlinkrpc(struct vnode *vp, struct uio *uiop) |
| 1091 | { |
| 1092 | u_int32_t *tl; |
| 1093 | caddr_t cp; |
| 1094 | int32_t t1, t2; |
| 1095 | caddr_t bpos, dpos, cp2; |
| 1096 | int error = 0, len, attrflag; |
| 1097 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1098 | int v3 = NFS_ISV3(vp); |
| 1099 | |
| 1100 | nfsstats.rpccnt[NFSPROC_READLINK]++; |
| 1101 | nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); |
| 1102 | nfsm_fhtom(vp, v3); |
| 1103 | nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK)); |
| 1104 | if (v3) |
| 1105 | nfsm_postop_attr(vp, attrflag); |
| 1106 | if (!error) { |
| 1107 | nfsm_strsiz(len, NFS_MAXPATHLEN); |
| 1108 | if (len == NFS_MAXPATHLEN) { |
| 1109 | struct nfsnode *np = VTONFS(vp); |
| 1110 | if (np->n_size && np->n_size < NFS_MAXPATHLEN) |
| 1111 | len = np->n_size; |
| 1112 | } |
| 1113 | nfsm_mtouio(uiop, len); |
| 1114 | } |
| 1115 | m_freem(mrep); |
| 1116 | nfsmout: |
| 1117 | return (error); |
| 1118 | } |
| 1119 | |
| 1120 | /* |
| 1121 | * nfs read rpc call |
| 1122 | * Ditto above |
| 1123 | */ |
| 1124 | int |
| 1125 | nfs_readrpc(struct vnode *vp, struct uio *uiop) |
| 1126 | { |
| 1127 | u_int32_t *tl; |
| 1128 | caddr_t cp; |
| 1129 | int32_t t1, t2; |
| 1130 | caddr_t bpos, dpos, cp2; |
| 1131 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1132 | struct nfsmount *nmp; |
| 1133 | int error = 0, len, retlen, tsiz, eof, attrflag; |
| 1134 | int v3 = NFS_ISV3(vp); |
| 1135 | |
| 1136 | #ifndef nolint |
| 1137 | eof = 0; |
| 1138 | #endif |
| 1139 | nmp = VFSTONFS(vp->v_mount); |
| 1140 | tsiz = uiop->uio_resid; |
| 1141 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1142 | return (EFBIG); |
| 1143 | while (tsiz > 0) { |
| 1144 | nfsstats.rpccnt[NFSPROC_READ]++; |
| 1145 | len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; |
| 1146 | nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); |
| 1147 | nfsm_fhtom(vp, v3); |
| 1148 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); |
| 1149 | if (v3) { |
| 1150 | txdr_hyper(uiop->uio_offset, tl); |
| 1151 | *(tl + 2) = txdr_unsigned(len); |
| 1152 | } else { |
| 1153 | *tl++ = txdr_unsigned(uiop->uio_offset); |
| 1154 | *tl++ = txdr_unsigned(len); |
| 1155 | *tl = 0; |
| 1156 | } |
| 1157 | nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 1158 | if (v3) { |
| 1159 | nfsm_postop_attr(vp, attrflag); |
| 1160 | if (error) { |
| 1161 | m_freem(mrep); |
| 1162 | goto nfsmout; |
| 1163 | } |
| 1164 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1165 | eof = fxdr_unsigned(int, *(tl + 1)); |
| 1166 | } else |
| 1167 | nfsm_loadattr(vp, (struct vattr *)0); |
| 1168 | nfsm_strsiz(retlen, nmp->nm_rsize); |
| 1169 | nfsm_mtouio(uiop, retlen); |
| 1170 | m_freem(mrep); |
| 1171 | tsiz -= retlen; |
| 1172 | if (v3) { |
| 1173 | if (eof || retlen == 0) { |
| 1174 | tsiz = 0; |
| 1175 | } |
| 1176 | } else if (retlen < len) { |
| 1177 | tsiz = 0; |
| 1178 | } |
| 1179 | } |
| 1180 | nfsmout: |
| 1181 | return (error); |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * nfs write call |
| 1186 | */ |
| 1187 | int |
| 1188 | nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit) |
| 1189 | { |
| 1190 | u_int32_t *tl; |
| 1191 | caddr_t cp; |
| 1192 | int32_t t1, t2, backup; |
| 1193 | caddr_t bpos, dpos, cp2; |
| 1194 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1195 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 1196 | int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; |
| 1197 | int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; |
| 1198 | |
| 1199 | #ifndef DIAGNOSTIC |
| 1200 | if (uiop->uio_iovcnt != 1) |
| 1201 | panic("nfs: writerpc iovcnt > 1"); |
| 1202 | #endif |
| 1203 | *must_commit = 0; |
| 1204 | tsiz = uiop->uio_resid; |
| 1205 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1206 | return (EFBIG); |
| 1207 | while (tsiz > 0) { |
| 1208 | nfsstats.rpccnt[NFSPROC_WRITE]++; |
| 1209 | len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; |
| 1210 | nfsm_reqhead(vp, NFSPROC_WRITE, |
| 1211 | NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); |
| 1212 | nfsm_fhtom(vp, v3); |
| 1213 | if (v3) { |
| 1214 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 1215 | txdr_hyper(uiop->uio_offset, tl); |
| 1216 | tl += 2; |
| 1217 | *tl++ = txdr_unsigned(len); |
| 1218 | *tl++ = txdr_unsigned(*iomode); |
| 1219 | *tl = txdr_unsigned(len); |
| 1220 | } else { |
| 1221 | u_int32_t x; |
| 1222 | |
| 1223 | nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); |
| 1224 | /* Set both "begin" and "current" to non-garbage. */ |
| 1225 | x = txdr_unsigned((u_int32_t)uiop->uio_offset); |
| 1226 | *tl++ = x; /* "begin offset" */ |
| 1227 | *tl++ = x; /* "current offset" */ |
| 1228 | x = txdr_unsigned(len); |
| 1229 | *tl++ = x; /* total to this offset */ |
| 1230 | *tl = x; /* size of this write */ |
| 1231 | } |
| 1232 | nfsm_uiotom(uiop, len); |
| 1233 | nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE)); |
| 1234 | if (v3) { |
| 1235 | wccflag = NFSV3_WCCCHK; |
| 1236 | nfsm_wcc_data(vp, wccflag); |
| 1237 | if (!error) { |
| 1238 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED |
| 1239 | + NFSX_V3WRITEVERF); |
| 1240 | rlen = fxdr_unsigned(int, *tl++); |
| 1241 | if (rlen == 0) { |
| 1242 | error = NFSERR_IO; |
| 1243 | m_freem(mrep); |
| 1244 | break; |
| 1245 | } else if (rlen < len) { |
| 1246 | backup = len - rlen; |
| 1247 | uiop->uio_iov->iov_base -= backup; |
| 1248 | uiop->uio_iov->iov_len += backup; |
| 1249 | uiop->uio_offset -= backup; |
| 1250 | uiop->uio_resid += backup; |
| 1251 | len = rlen; |
| 1252 | } |
| 1253 | commit = fxdr_unsigned(int, *tl++); |
| 1254 | |
| 1255 | /* |
| 1256 | * Return the lowest committment level |
| 1257 | * obtained by any of the RPCs. |
| 1258 | */ |
| 1259 | if (committed == NFSV3WRITE_FILESYNC) |
| 1260 | committed = commit; |
| 1261 | else if (committed == NFSV3WRITE_DATASYNC && |
| 1262 | commit == NFSV3WRITE_UNSTABLE) |
| 1263 | committed = commit; |
| 1264 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ |
| 1265 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 1266 | NFSX_V3WRITEVERF); |
| 1267 | nmp->nm_state |= NFSSTA_HASWRITEVERF; |
| 1268 | } else if (bcmp((caddr_t)tl, |
| 1269 | (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { |
| 1270 | *must_commit = 1; |
| 1271 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 1272 | NFSX_V3WRITEVERF); |
| 1273 | } |
| 1274 | } |
| 1275 | } else |
| 1276 | nfsm_loadattr(vp, (struct vattr *)0); |
| 1277 | if (wccflag) |
| 1278 | VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; |
| 1279 | m_freem(mrep); |
| 1280 | if (error) |
| 1281 | break; |
| 1282 | tsiz -= len; |
| 1283 | } |
| 1284 | nfsmout: |
| 1285 | if (vp->v_mount->mnt_flag & MNT_ASYNC) |
| 1286 | committed = NFSV3WRITE_FILESYNC; |
| 1287 | *iomode = committed; |
| 1288 | if (error) |
| 1289 | uiop->uio_resid = tsiz; |
| 1290 | return (error); |
| 1291 | } |
| 1292 | |
| 1293 | /* |
| 1294 | * nfs mknod rpc |
| 1295 | * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the |
| 1296 | * mode set to specify the file type and the size field for rdev. |
| 1297 | */ |
| 1298 | static int |
| 1299 | nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, |
| 1300 | struct vattr *vap) |
| 1301 | { |
| 1302 | struct nfsv2_sattr *sp; |
| 1303 | u_int32_t *tl; |
| 1304 | caddr_t cp; |
| 1305 | int32_t t1, t2; |
| 1306 | struct vnode *newvp = (struct vnode *)0; |
| 1307 | struct nfsnode *np = (struct nfsnode *)0; |
| 1308 | struct vattr vattr; |
| 1309 | char *cp2; |
| 1310 | caddr_t bpos, dpos; |
| 1311 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
| 1312 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1313 | u_int32_t rdev; |
| 1314 | int v3 = NFS_ISV3(dvp); |
| 1315 | |
| 1316 | if (vap->va_type == VCHR || vap->va_type == VBLK) |
| 1317 | rdev = txdr_unsigned(vap->va_rdev); |
| 1318 | else if (vap->va_type == VFIFO || vap->va_type == VSOCK) |
| 1319 | rdev = nfs_xdrneg1; |
| 1320 | else { |
| 1321 | return (EOPNOTSUPP); |
| 1322 | } |
| 1323 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1324 | return (error); |
| 1325 | } |
| 1326 | nfsstats.rpccnt[NFSPROC_MKNOD]++; |
| 1327 | nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + |
| 1328 | + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1329 | nfsm_fhtom(dvp, v3); |
| 1330 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1331 | if (v3) { |
| 1332 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1333 | *tl++ = vtonfsv3_type(vap->va_type); |
| 1334 | nfsm_v3attrbuild(vap, FALSE); |
| 1335 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
| 1336 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1337 | *tl++ = txdr_unsigned(umajor(vap->va_rdev)); |
| 1338 | *tl = txdr_unsigned(uminor(vap->va_rdev)); |
| 1339 | } |
| 1340 | } else { |
| 1341 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1342 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1343 | sp->sa_uid = nfs_xdrneg1; |
| 1344 | sp->sa_gid = nfs_xdrneg1; |
| 1345 | sp->sa_size = rdev; |
| 1346 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1347 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1348 | } |
| 1349 | nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred); |
| 1350 | if (!error) { |
| 1351 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1352 | if (!gotvp) { |
| 1353 | if (newvp) { |
| 1354 | vput(newvp); |
| 1355 | newvp = (struct vnode *)0; |
| 1356 | } |
| 1357 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1358 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
| 1359 | if (!error) |
| 1360 | newvp = NFSTOV(np); |
| 1361 | } |
| 1362 | } |
| 1363 | if (v3) |
| 1364 | nfsm_wcc_data(dvp, wccflag); |
| 1365 | m_freem(mrep); |
| 1366 | nfsmout: |
| 1367 | if (error) { |
| 1368 | if (newvp) |
| 1369 | vput(newvp); |
| 1370 | } else { |
| 1371 | if (cnp->cn_flags & CNP_MAKEENTRY) |
| 1372 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1373 | *vpp = newvp; |
| 1374 | } |
| 1375 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1376 | if (!wccflag) |
| 1377 | VTONFS(dvp)->n_attrstamp = 0; |
| 1378 | return (error); |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * nfs mknod vop |
| 1383 | * just call nfs_mknodrpc() to do the work. |
| 1384 | * |
| 1385 | * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1386 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1387 | */ |
| 1388 | /* ARGSUSED */ |
| 1389 | static int |
| 1390 | nfs_mknod(struct vop_mknod_args *ap) |
| 1391 | { |
| 1392 | return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); |
| 1393 | } |
| 1394 | |
| 1395 | static u_long create_verf; |
| 1396 | /* |
| 1397 | * nfs file create call |
| 1398 | * |
| 1399 | * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1400 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1401 | */ |
| 1402 | static int |
| 1403 | nfs_create(struct vop_create_args *ap) |
| 1404 | { |
| 1405 | struct vnode *dvp = ap->a_dvp; |
| 1406 | struct vattr *vap = ap->a_vap; |
| 1407 | struct componentname *cnp = ap->a_cnp; |
| 1408 | struct nfsv2_sattr *sp; |
| 1409 | u_int32_t *tl; |
| 1410 | caddr_t cp; |
| 1411 | int32_t t1, t2; |
| 1412 | struct nfsnode *np = (struct nfsnode *)0; |
| 1413 | struct vnode *newvp = (struct vnode *)0; |
| 1414 | caddr_t bpos, dpos, cp2; |
| 1415 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; |
| 1416 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1417 | struct vattr vattr; |
| 1418 | int v3 = NFS_ISV3(dvp); |
| 1419 | |
| 1420 | /* |
| 1421 | * Oops, not for me.. |
| 1422 | */ |
| 1423 | if (vap->va_type == VSOCK) |
| 1424 | return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); |
| 1425 | |
| 1426 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1427 | return (error); |
| 1428 | } |
| 1429 | if (vap->va_vaflags & VA_EXCLUSIVE) |
| 1430 | fmode |= O_EXCL; |
| 1431 | again: |
| 1432 | nfsstats.rpccnt[NFSPROC_CREATE]++; |
| 1433 | nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + |
| 1434 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1435 | nfsm_fhtom(dvp, v3); |
| 1436 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1437 | if (v3) { |
| 1438 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1439 | if (fmode & O_EXCL) { |
| 1440 | *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); |
| 1441 | nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); |
| 1442 | #ifdef INET |
| 1443 | if (!TAILQ_EMPTY(&in_ifaddrhead)) |
| 1444 | *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr; |
| 1445 | else |
| 1446 | #endif |
| 1447 | *tl++ = create_verf; |
| 1448 | *tl = ++create_verf; |
| 1449 | } else { |
| 1450 | *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); |
| 1451 | nfsm_v3attrbuild(vap, FALSE); |
| 1452 | } |
| 1453 | } else { |
| 1454 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1455 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1456 | sp->sa_uid = nfs_xdrneg1; |
| 1457 | sp->sa_gid = nfs_xdrneg1; |
| 1458 | sp->sa_size = 0; |
| 1459 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1460 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1461 | } |
| 1462 | nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred); |
| 1463 | if (!error) { |
| 1464 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1465 | if (!gotvp) { |
| 1466 | if (newvp) { |
| 1467 | vput(newvp); |
| 1468 | newvp = (struct vnode *)0; |
| 1469 | } |
| 1470 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1471 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
| 1472 | if (!error) |
| 1473 | newvp = NFSTOV(np); |
| 1474 | } |
| 1475 | } |
| 1476 | if (v3) |
| 1477 | nfsm_wcc_data(dvp, wccflag); |
| 1478 | m_freem(mrep); |
| 1479 | nfsmout: |
| 1480 | if (error) { |
| 1481 | if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { |
| 1482 | fmode &= ~O_EXCL; |
| 1483 | goto again; |
| 1484 | } |
| 1485 | if (newvp) |
| 1486 | vput(newvp); |
| 1487 | } else if (v3 && (fmode & O_EXCL)) { |
| 1488 | /* |
| 1489 | * We are normally called with only a partially initialized |
| 1490 | * VAP. Since the NFSv3 spec says that server may use the |
| 1491 | * file attributes to store the verifier, the spec requires |
| 1492 | * us to do a SETATTR RPC. FreeBSD servers store the verifier |
| 1493 | * in atime, but we can't really assume that all servers will |
| 1494 | * so we ensure that our SETATTR sets both atime and mtime. |
| 1495 | */ |
| 1496 | if (vap->va_mtime.tv_sec == VNOVAL) |
| 1497 | vfs_timestamp(&vap->va_mtime); |
| 1498 | if (vap->va_atime.tv_sec == VNOVAL) |
| 1499 | vap->va_atime = vap->va_mtime; |
| 1500 | error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); |
| 1501 | } |
| 1502 | if (!error) { |
| 1503 | if (cnp->cn_flags & CNP_MAKEENTRY) |
| 1504 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1505 | /* |
| 1506 | * The new np may have enough info for access |
| 1507 | * checks, make sure rucred and wucred are |
| 1508 | * initialized for read and write rpc's. |
| 1509 | */ |
| 1510 | np = VTONFS(newvp); |
| 1511 | if (np->n_rucred == NULL) |
| 1512 | np->n_rucred = crhold(cnp->cn_cred); |
| 1513 | if (np->n_wucred == NULL) |
| 1514 | np->n_wucred = crhold(cnp->cn_cred); |
| 1515 | *ap->a_vpp = newvp; |
| 1516 | } |
| 1517 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1518 | if (!wccflag) |
| 1519 | VTONFS(dvp)->n_attrstamp = 0; |
| 1520 | return (error); |
| 1521 | } |
| 1522 | |
| 1523 | /* |
| 1524 | * nfs file remove call |
| 1525 | * To try and make nfs semantics closer to ufs semantics, a file that has |
| 1526 | * other processes using the vnode is renamed instead of removed and then |
| 1527 | * removed later on the last close. |
| 1528 | * - If v_usecount > 1 |
| 1529 | * If a rename is not already in the works |
| 1530 | * call nfs_sillyrename() to set it up |
| 1531 | * else |
| 1532 | * do the remove rpc |
| 1533 | * |
| 1534 | * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp, |
| 1535 | * struct vnode *a_vp, struct componentname *a_cnp) |
| 1536 | */ |
| 1537 | static int |
| 1538 | nfs_remove(struct vop_remove_args *ap) |
| 1539 | { |
| 1540 | struct vnode *vp = ap->a_vp; |
| 1541 | struct vnode *dvp = ap->a_dvp; |
| 1542 | struct componentname *cnp = ap->a_cnp; |
| 1543 | struct nfsnode *np = VTONFS(vp); |
| 1544 | int error = 0; |
| 1545 | struct vattr vattr; |
| 1546 | |
| 1547 | #ifndef DIAGNOSTIC |
| 1548 | if ((cnp->cn_flags & CNP_HASBUF) == 0) |
| 1549 | panic("nfs_remove: no name"); |
| 1550 | if (vp->v_usecount < 1) |
| 1551 | panic("nfs_remove: bad v_usecount"); |
| 1552 | #endif |
| 1553 | if (vp->v_type == VDIR) |
| 1554 | error = EPERM; |
| 1555 | else if (vp->v_usecount == 1 || (np->n_sillyrename && |
| 1556 | VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 && |
| 1557 | vattr.va_nlink > 1)) { |
| 1558 | /* |
| 1559 | * Purge the name cache so that the chance of a lookup for |
| 1560 | * the name succeeding while the remove is in progress is |
| 1561 | * minimized. Without node locking it can still happen, such |
| 1562 | * that an I/O op returns ESTALE, but since you get this if |
| 1563 | * another host removes the file.. |
| 1564 | */ |
| 1565 | cache_purge(vp); |
| 1566 | /* |
| 1567 | * throw away biocache buffers, mainly to avoid |
| 1568 | * unnecessary delayed writes later. |
| 1569 | */ |
| 1570 | error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1); |
| 1571 | /* Do the rpc */ |
| 1572 | if (error != EINTR) |
| 1573 | error = nfs_removerpc(dvp, cnp->cn_nameptr, |
| 1574 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); |
| 1575 | /* |
| 1576 | * Kludge City: If the first reply to the remove rpc is lost.. |
| 1577 | * the reply to the retransmitted request will be ENOENT |
| 1578 | * since the file was in fact removed |
| 1579 | * Therefore, we cheat and return success. |
| 1580 | */ |
| 1581 | if (error == ENOENT) |
| 1582 | error = 0; |
| 1583 | } else if (!np->n_sillyrename) |
| 1584 | error = nfs_sillyrename(dvp, vp, cnp); |
| 1585 | np->n_attrstamp = 0; |
| 1586 | return (error); |
| 1587 | } |
| 1588 | |
| 1589 | /* |
| 1590 | * nfs file remove rpc called from nfs_inactive |
| 1591 | */ |
| 1592 | int |
| 1593 | nfs_removeit(struct sillyrename *sp) |
| 1594 | { |
| 1595 | return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, |
| 1596 | sp->s_cred, NULL)); |
| 1597 | } |
| 1598 | |
| 1599 | /* |
| 1600 | * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). |
| 1601 | */ |
| 1602 | static int |
| 1603 | nfs_removerpc(struct vnode *dvp, const char *name, int namelen, |
| 1604 | struct ucred *cred, struct thread *td) |
| 1605 | { |
| 1606 | u_int32_t *tl; |
| 1607 | caddr_t cp; |
| 1608 | int32_t t1, t2; |
| 1609 | caddr_t bpos, dpos, cp2; |
| 1610 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 1611 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1612 | int v3 = NFS_ISV3(dvp); |
| 1613 | |
| 1614 | nfsstats.rpccnt[NFSPROC_REMOVE]++; |
| 1615 | nfsm_reqhead(dvp, NFSPROC_REMOVE, |
| 1616 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
| 1617 | nfsm_fhtom(dvp, v3); |
| 1618 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
| 1619 | nfsm_request(dvp, NFSPROC_REMOVE, td, cred); |
| 1620 | if (v3) |
| 1621 | nfsm_wcc_data(dvp, wccflag); |
| 1622 | m_freem(mrep); |
| 1623 | nfsmout: |
| 1624 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1625 | if (!wccflag) |
| 1626 | VTONFS(dvp)->n_attrstamp = 0; |
| 1627 | return (error); |
| 1628 | } |
| 1629 | |
| 1630 | /* |
| 1631 | * nfs file rename call |
| 1632 | * |
| 1633 | * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, |
| 1634 | * struct componentname *a_fcnp, struct vnode *a_tdvp, |
| 1635 | * struct vnode *a_tvp, struct componentname *a_tcnp) |
| 1636 | */ |
| 1637 | static int |
| 1638 | nfs_rename(struct vop_rename_args *ap) |
| 1639 | { |
| 1640 | struct vnode *fvp = ap->a_fvp; |
| 1641 | struct vnode *tvp = ap->a_tvp; |
| 1642 | struct vnode *fdvp = ap->a_fdvp; |
| 1643 | struct vnode *tdvp = ap->a_tdvp; |
| 1644 | struct componentname *tcnp = ap->a_tcnp; |
| 1645 | struct componentname *fcnp = ap->a_fcnp; |
| 1646 | int error; |
| 1647 | |
| 1648 | #ifndef DIAGNOSTIC |
| 1649 | if ((tcnp->cn_flags & CNP_HASBUF) == 0 || |
| 1650 | (fcnp->cn_flags & CNP_HASBUF) == 0) |
| 1651 | panic("nfs_rename: no name"); |
| 1652 | #endif |
| 1653 | /* Check for cross-device rename */ |
| 1654 | if ((fvp->v_mount != tdvp->v_mount) || |
| 1655 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
| 1656 | error = EXDEV; |
| 1657 | goto out; |
| 1658 | } |
| 1659 | |
| 1660 | /* |
| 1661 | * We have to flush B_DELWRI data prior to renaming |
| 1662 | * the file. If we don't, the delayed-write buffers |
| 1663 | * can be flushed out later after the file has gone stale |
| 1664 | * under NFSV3. NFSV2 does not have this problem because |
| 1665 | * ( as far as I can tell ) it flushes dirty buffers more |
| 1666 | * often. |
| 1667 | */ |
| 1668 | |
| 1669 | VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td); |
| 1670 | if (tvp) |
| 1671 | VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td); |
| 1672 | |
| 1673 | /* |
| 1674 | * If the tvp exists and is in use, sillyrename it before doing the |
| 1675 | * rename of the new file over it. |
| 1676 | * XXX Can't sillyrename a directory. |
| 1677 | */ |
| 1678 | if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && |
| 1679 | tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { |
| 1680 | vput(tvp); |
| 1681 | tvp = NULL; |
| 1682 | } |
| 1683 | |
| 1684 | error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
| 1685 | tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, |
| 1686 | tcnp->cn_td); |
| 1687 | |
| 1688 | if (fvp->v_type == VDIR) { |
| 1689 | if (tvp != NULL && tvp->v_type == VDIR) |
| 1690 | cache_purge(tdvp); |
| 1691 | cache_purge(fdvp); |
| 1692 | } |
| 1693 | |
| 1694 | out: |
| 1695 | if (tdvp == tvp) |
| 1696 | vrele(tdvp); |
| 1697 | else |
| 1698 | vput(tdvp); |
| 1699 | if (tvp) |
| 1700 | vput(tvp); |
| 1701 | vrele(fdvp); |
| 1702 | vrele(fvp); |
| 1703 | /* |
| 1704 | * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. |
| 1705 | */ |
| 1706 | if (error == ENOENT) |
| 1707 | error = 0; |
| 1708 | return (error); |
| 1709 | } |
| 1710 | |
| 1711 | /* |
| 1712 | * nfs file rename rpc called from nfs_remove() above |
| 1713 | */ |
| 1714 | static int |
| 1715 | nfs_renameit(struct vnode *sdvp, struct componentname *scnp, |
| 1716 | struct sillyrename *sp) |
| 1717 | { |
| 1718 | return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, |
| 1719 | sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). |
| 1724 | */ |
| 1725 | static int |
| 1726 | nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, |
| 1727 | struct vnode *tdvp, const char *tnameptr, int tnamelen, |
| 1728 | struct ucred *cred, struct thread *td) |
| 1729 | { |
| 1730 | u_int32_t *tl; |
| 1731 | caddr_t cp; |
| 1732 | int32_t t1, t2; |
| 1733 | caddr_t bpos, dpos, cp2; |
| 1734 | int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; |
| 1735 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1736 | int v3 = NFS_ISV3(fdvp); |
| 1737 | |
| 1738 | nfsstats.rpccnt[NFSPROC_RENAME]++; |
| 1739 | nfsm_reqhead(fdvp, NFSPROC_RENAME, |
| 1740 | (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + |
| 1741 | nfsm_rndup(tnamelen)); |
| 1742 | nfsm_fhtom(fdvp, v3); |
| 1743 | nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); |
| 1744 | nfsm_fhtom(tdvp, v3); |
| 1745 | nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); |
| 1746 | nfsm_request(fdvp, NFSPROC_RENAME, td, cred); |
| 1747 | if (v3) { |
| 1748 | nfsm_wcc_data(fdvp, fwccflag); |
| 1749 | nfsm_wcc_data(tdvp, twccflag); |
| 1750 | } |
| 1751 | m_freem(mrep); |
| 1752 | nfsmout: |
| 1753 | VTONFS(fdvp)->n_flag |= NMODIFIED; |
| 1754 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
| 1755 | if (!fwccflag) |
| 1756 | VTONFS(fdvp)->n_attrstamp = 0; |
| 1757 | if (!twccflag) |
| 1758 | VTONFS(tdvp)->n_attrstamp = 0; |
| 1759 | return (error); |
| 1760 | } |
| 1761 | |
| 1762 | /* |
| 1763 | * nfs hard link create call |
| 1764 | * |
| 1765 | * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, |
| 1766 | * struct componentname *a_cnp) |
| 1767 | */ |
| 1768 | static int |
| 1769 | nfs_link(struct vop_link_args *ap) |
| 1770 | { |
| 1771 | struct vnode *vp = ap->a_vp; |
| 1772 | struct vnode *tdvp = ap->a_tdvp; |
| 1773 | struct componentname *cnp = ap->a_cnp; |
| 1774 | u_int32_t *tl; |
| 1775 | caddr_t cp; |
| 1776 | int32_t t1, t2; |
| 1777 | caddr_t bpos, dpos, cp2; |
| 1778 | int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; |
| 1779 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1780 | int v3; |
| 1781 | |
| 1782 | if (vp->v_mount != tdvp->v_mount) { |
| 1783 | return (EXDEV); |
| 1784 | } |
| 1785 | |
| 1786 | /* |
| 1787 | * Push all writes to the server, so that the attribute cache |
| 1788 | * doesn't get "out of sync" with the server. |
| 1789 | * XXX There should be a better way! |
| 1790 | */ |
| 1791 | VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td); |
| 1792 | |
| 1793 | v3 = NFS_ISV3(vp); |
| 1794 | nfsstats.rpccnt[NFSPROC_LINK]++; |
| 1795 | nfsm_reqhead(vp, NFSPROC_LINK, |
| 1796 | NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
| 1797 | nfsm_fhtom(vp, v3); |
| 1798 | nfsm_fhtom(tdvp, v3); |
| 1799 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1800 | nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred); |
| 1801 | if (v3) { |
| 1802 | nfsm_postop_attr(vp, attrflag); |
| 1803 | nfsm_wcc_data(tdvp, wccflag); |
| 1804 | } |
| 1805 | m_freem(mrep); |
| 1806 | nfsmout: |
| 1807 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
| 1808 | if (!attrflag) |
| 1809 | VTONFS(vp)->n_attrstamp = 0; |
| 1810 | if (!wccflag) |
| 1811 | VTONFS(tdvp)->n_attrstamp = 0; |
| 1812 | /* |
| 1813 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
| 1814 | */ |
| 1815 | if (error == EEXIST) |
| 1816 | error = 0; |
| 1817 | return (error); |
| 1818 | } |
| 1819 | |
| 1820 | /* |
| 1821 | * nfs symbolic link create call |
| 1822 | * |
| 1823 | * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1824 | * struct componentname *a_cnp, struct vattr *a_vap, |
| 1825 | * char *a_target) |
| 1826 | */ |
| 1827 | static int |
| 1828 | nfs_symlink(struct vop_symlink_args *ap) |
| 1829 | { |
| 1830 | struct vnode *dvp = ap->a_dvp; |
| 1831 | struct vattr *vap = ap->a_vap; |
| 1832 | struct componentname *cnp = ap->a_cnp; |
| 1833 | struct nfsv2_sattr *sp; |
| 1834 | u_int32_t *tl; |
| 1835 | caddr_t cp; |
| 1836 | int32_t t1, t2; |
| 1837 | caddr_t bpos, dpos, cp2; |
| 1838 | int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; |
| 1839 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1840 | struct vnode *newvp = (struct vnode *)0; |
| 1841 | int v3 = NFS_ISV3(dvp); |
| 1842 | |
| 1843 | nfsstats.rpccnt[NFSPROC_SYMLINK]++; |
| 1844 | slen = strlen(ap->a_target); |
| 1845 | nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + |
| 1846 | nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); |
| 1847 | nfsm_fhtom(dvp, v3); |
| 1848 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1849 | if (v3) { |
| 1850 | nfsm_v3attrbuild(vap, FALSE); |
| 1851 | } |
| 1852 | nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); |
| 1853 | if (!v3) { |
| 1854 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1855 | sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); |
| 1856 | sp->sa_uid = nfs_xdrneg1; |
| 1857 | sp->sa_gid = nfs_xdrneg1; |
| 1858 | sp->sa_size = nfs_xdrneg1; |
| 1859 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1860 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1861 | } |
| 1862 | |
| 1863 | /* |
| 1864 | * Issue the NFS request and get the rpc response. |
| 1865 | * |
| 1866 | * Only NFSv3 responses returning an error of 0 actually return |
| 1867 | * a file handle that can be converted into newvp without having |
| 1868 | * to do an extra lookup rpc. |
| 1869 | */ |
| 1870 | nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred); |
| 1871 | if (v3) { |
| 1872 | if (error == 0) |
| 1873 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1874 | nfsm_wcc_data(dvp, wccflag); |
| 1875 | } |
| 1876 | |
| 1877 | /* |
| 1878 | * out code jumps -> here, mrep is also freed. |
| 1879 | */ |
| 1880 | |
| 1881 | m_freem(mrep); |
| 1882 | nfsmout: |
| 1883 | |
| 1884 | /* |
| 1885 | * If we get an EEXIST error, silently convert it to no-error |
| 1886 | * in case of an NFS retry. |
| 1887 | */ |
| 1888 | if (error == EEXIST) |
| 1889 | error = 0; |
| 1890 | |
| 1891 | /* |
| 1892 | * If we do not have (or no longer have) an error, and we could |
| 1893 | * not extract the newvp from the response due to the request being |
| 1894 | * NFSv2 or the error being EEXIST. We have to do a lookup in order |
| 1895 | * to obtain a newvp to return. |
| 1896 | */ |
| 1897 | if (error == 0 && newvp == NULL) { |
| 1898 | struct nfsnode *np = NULL; |
| 1899 | |
| 1900 | error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 1901 | cnp->cn_cred, cnp->cn_td, &np); |
| 1902 | if (!error) |
| 1903 | newvp = NFSTOV(np); |
| 1904 | } |
| 1905 | if (error) { |
| 1906 | if (newvp) |
| 1907 | vput(newvp); |
| 1908 | } else { |
| 1909 | *ap->a_vpp = newvp; |
| 1910 | } |
| 1911 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1912 | if (!wccflag) |
| 1913 | VTONFS(dvp)->n_attrstamp = 0; |
| 1914 | return (error); |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * nfs make dir call |
| 1919 | * |
| 1920 | * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1921 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1922 | */ |
| 1923 | static int |
| 1924 | nfs_mkdir(struct vop_mkdir_args *ap) |
| 1925 | { |
| 1926 | struct vnode *dvp = ap->a_dvp; |
| 1927 | struct vattr *vap = ap->a_vap; |
| 1928 | struct componentname *cnp = ap->a_cnp; |
| 1929 | struct nfsv2_sattr *sp; |
| 1930 | u_int32_t *tl; |
| 1931 | caddr_t cp; |
| 1932 | int32_t t1, t2; |
| 1933 | int len; |
| 1934 | struct nfsnode *np = (struct nfsnode *)0; |
| 1935 | struct vnode *newvp = (struct vnode *)0; |
| 1936 | caddr_t bpos, dpos, cp2; |
| 1937 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 1938 | int gotvp = 0; |
| 1939 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1940 | struct vattr vattr; |
| 1941 | int v3 = NFS_ISV3(dvp); |
| 1942 | |
| 1943 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1944 | return (error); |
| 1945 | } |
| 1946 | len = cnp->cn_namelen; |
| 1947 | nfsstats.rpccnt[NFSPROC_MKDIR]++; |
| 1948 | nfsm_reqhead(dvp, NFSPROC_MKDIR, |
| 1949 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); |
| 1950 | nfsm_fhtom(dvp, v3); |
| 1951 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 1952 | if (v3) { |
| 1953 | nfsm_v3attrbuild(vap, FALSE); |
| 1954 | } else { |
| 1955 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1956 | sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); |
| 1957 | sp->sa_uid = nfs_xdrneg1; |
| 1958 | sp->sa_gid = nfs_xdrneg1; |
| 1959 | sp->sa_size = nfs_xdrneg1; |
| 1960 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1961 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1962 | } |
| 1963 | nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred); |
| 1964 | if (!error) |
| 1965 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1966 | if (v3) |
| 1967 | nfsm_wcc_data(dvp, wccflag); |
| 1968 | m_freem(mrep); |
| 1969 | nfsmout: |
| 1970 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1971 | if (!wccflag) |
| 1972 | VTONFS(dvp)->n_attrstamp = 0; |
| 1973 | /* |
| 1974 | * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry |
| 1975 | * if we can succeed in looking up the directory. |
| 1976 | */ |
| 1977 | if (error == EEXIST || (!error && !gotvp)) { |
| 1978 | if (newvp) { |
| 1979 | vrele(newvp); |
| 1980 | newvp = (struct vnode *)0; |
| 1981 | } |
| 1982 | error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, |
| 1983 | cnp->cn_td, &np); |
| 1984 | if (!error) { |
| 1985 | newvp = NFSTOV(np); |
| 1986 | if (newvp->v_type != VDIR) |
| 1987 | error = EEXIST; |
| 1988 | } |
| 1989 | } |
| 1990 | if (error) { |
| 1991 | if (newvp) |
| 1992 | vrele(newvp); |
| 1993 | } else |
| 1994 | *ap->a_vpp = newvp; |
| 1995 | return (error); |
| 1996 | } |
| 1997 | |
| 1998 | /* |
| 1999 | * nfs remove directory call |
| 2000 | * |
| 2001 | * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, |
| 2002 | * struct componentname *a_cnp) |
| 2003 | */ |
| 2004 | static int |
| 2005 | nfs_rmdir(struct vop_rmdir_args *ap) |
| 2006 | { |
| 2007 | struct vnode *vp = ap->a_vp; |
| 2008 | struct vnode *dvp = ap->a_dvp; |
| 2009 | struct componentname *cnp = ap->a_cnp; |
| 2010 | u_int32_t *tl; |
| 2011 | caddr_t cp; |
| 2012 | int32_t t1, t2; |
| 2013 | caddr_t bpos, dpos, cp2; |
| 2014 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2015 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2016 | int v3 = NFS_ISV3(dvp); |
| 2017 | |
| 2018 | if (dvp == vp) |
| 2019 | return (EINVAL); |
| 2020 | nfsstats.rpccnt[NFSPROC_RMDIR]++; |
| 2021 | nfsm_reqhead(dvp, NFSPROC_RMDIR, |
| 2022 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
| 2023 | nfsm_fhtom(dvp, v3); |
| 2024 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 2025 | nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred); |
| 2026 | if (v3) |
| 2027 | nfsm_wcc_data(dvp, wccflag); |
| 2028 | m_freem(mrep); |
| 2029 | nfsmout: |
| 2030 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2031 | if (!wccflag) |
| 2032 | VTONFS(dvp)->n_attrstamp = 0; |
| 2033 | cache_purge(dvp); |
| 2034 | cache_purge(vp); |
| 2035 | /* |
| 2036 | * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. |
| 2037 | */ |
| 2038 | if (error == ENOENT) |
| 2039 | error = 0; |
| 2040 | return (error); |
| 2041 | } |
| 2042 | |
| 2043 | /* |
| 2044 | * nfs readdir call |
| 2045 | * |
| 2046 | * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) |
| 2047 | */ |
| 2048 | static int |
| 2049 | nfs_readdir(struct vop_readdir_args *ap) |
| 2050 | { |
| 2051 | struct vnode *vp = ap->a_vp; |
| 2052 | struct nfsnode *np = VTONFS(vp); |
| 2053 | struct uio *uio = ap->a_uio; |
| 2054 | int tresid, error; |
| 2055 | struct vattr vattr; |
| 2056 | |
| 2057 | if (vp->v_type != VDIR) |
| 2058 | return (EPERM); |
| 2059 | /* |
| 2060 | * First, check for hit on the EOF offset cache |
| 2061 | */ |
| 2062 | if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && |
| 2063 | (np->n_flag & NMODIFIED) == 0) { |
| 2064 | if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { |
| 2065 | if (NQNFS_CKCACHABLE(vp, ND_READ)) { |
| 2066 | nfsstats.direofcache_hits++; |
| 2067 | return (0); |
| 2068 | } |
| 2069 | } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 && |
| 2070 | np->n_mtime == vattr.va_mtime.tv_sec) { |
| 2071 | nfsstats.direofcache_hits++; |
| 2072 | return (0); |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | /* |
| 2077 | * Call nfs_bioread() to do the real work. |
| 2078 | */ |
| 2079 | tresid = uio->uio_resid; |
| 2080 | error = nfs_bioread(vp, uio, 0); |
| 2081 | |
| 2082 | if (!error && uio->uio_resid == tresid) |
| 2083 | nfsstats.direofcache_misses++; |
| 2084 | return (error); |
| 2085 | } |
| 2086 | |
| 2087 | /* |
| 2088 | * Readdir rpc call. |
| 2089 | * Called from below the buffer cache by nfs_doio(). |
| 2090 | */ |
| 2091 | int |
| 2092 | nfs_readdirrpc(struct vnode *vp, struct uio *uiop) |
| 2093 | { |
| 2094 | int len, left; |
| 2095 | struct dirent *dp = NULL; |
| 2096 | u_int32_t *tl; |
| 2097 | caddr_t cp; |
| 2098 | int32_t t1, t2; |
| 2099 | nfsuint64 *cookiep; |
| 2100 | caddr_t bpos, dpos, cp2; |
| 2101 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2102 | nfsuint64 cookie; |
| 2103 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2104 | struct nfsnode *dnp = VTONFS(vp); |
| 2105 | u_quad_t fileno; |
| 2106 | int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; |
| 2107 | int attrflag; |
| 2108 | int v3 = NFS_ISV3(vp); |
| 2109 | |
| 2110 | #ifndef DIAGNOSTIC |
| 2111 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || |
| 2112 | (uiop->uio_resid & (DIRBLKSIZ - 1))) |
| 2113 | panic("nfs readdirrpc bad uio"); |
| 2114 | #endif |
| 2115 | |
| 2116 | /* |
| 2117 | * If there is no cookie, assume directory was stale. |
| 2118 | */ |
| 2119 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); |
| 2120 | if (cookiep) |
| 2121 | cookie = *cookiep; |
| 2122 | else |
| 2123 | return (NFSERR_BAD_COOKIE); |
| 2124 | /* |
| 2125 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2126 | * truncated to a multiple of DIRBLKSIZ. |
| 2127 | * The stopping criteria is EOF or buffer full. |
| 2128 | */ |
| 2129 | while (more_dirs && bigenough) { |
| 2130 | nfsstats.rpccnt[NFSPROC_READDIR]++; |
| 2131 | nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + |
| 2132 | NFSX_READDIR(v3)); |
| 2133 | nfsm_fhtom(vp, v3); |
| 2134 | if (v3) { |
| 2135 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 2136 | *tl++ = cookie.nfsuquad[0]; |
| 2137 | *tl++ = cookie.nfsuquad[1]; |
| 2138 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2139 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2140 | } else { |
| 2141 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 2142 | *tl++ = cookie.nfsuquad[0]; |
| 2143 | } |
| 2144 | *tl = txdr_unsigned(nmp->nm_readdirsize); |
| 2145 | nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 2146 | if (v3) { |
| 2147 | nfsm_postop_attr(vp, attrflag); |
| 2148 | if (!error) { |
| 2149 | nfsm_dissect(tl, u_int32_t *, |
| 2150 | 2 * NFSX_UNSIGNED); |
| 2151 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2152 | dnp->n_cookieverf.nfsuquad[1] = *tl; |
| 2153 | } else { |
| 2154 | m_freem(mrep); |
| 2155 | goto nfsmout; |
| 2156 | } |
| 2157 | } |
| 2158 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2159 | more_dirs = fxdr_unsigned(int, *tl); |
| 2160 | |
| 2161 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2162 | while (more_dirs && bigenough) { |
| 2163 | if (v3) { |
| 2164 | nfsm_dissect(tl, u_int32_t *, |
| 2165 | 3 * NFSX_UNSIGNED); |
| 2166 | fileno = fxdr_hyper(tl); |
| 2167 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2168 | } else { |
| 2169 | nfsm_dissect(tl, u_int32_t *, |
| 2170 | 2 * NFSX_UNSIGNED); |
| 2171 | fileno = fxdr_unsigned(u_quad_t, *tl++); |
| 2172 | len = fxdr_unsigned(int, *tl); |
| 2173 | } |
| 2174 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2175 | error = EBADRPC; |
| 2176 | m_freem(mrep); |
| 2177 | goto nfsmout; |
| 2178 | } |
| 2179 | tlen = nfsm_rndup(len); |
| 2180 | if (tlen == len) |
| 2181 | tlen += 4; /* To ensure null termination */ |
| 2182 | left = DIRBLKSIZ - blksiz; |
| 2183 | if ((tlen + DIRHDSIZ) > left) { |
| 2184 | dp->d_reclen += left; |
| 2185 | uiop->uio_iov->iov_base += left; |
| 2186 | uiop->uio_iov->iov_len -= left; |
| 2187 | uiop->uio_offset += left; |
| 2188 | uiop->uio_resid -= left; |
| 2189 | blksiz = 0; |
| 2190 | } |
| 2191 | if ((tlen + DIRHDSIZ) > uiop->uio_resid) |
| 2192 | bigenough = 0; |
| 2193 | if (bigenough) { |
| 2194 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2195 | dp->d_fileno = (int)fileno; |
| 2196 | dp->d_namlen = len; |
| 2197 | dp->d_reclen = tlen + DIRHDSIZ; |
| 2198 | dp->d_type = DT_UNKNOWN; |
| 2199 | blksiz += dp->d_reclen; |
| 2200 | if (blksiz == DIRBLKSIZ) |
| 2201 | blksiz = 0; |
| 2202 | uiop->uio_offset += DIRHDSIZ; |
| 2203 | uiop->uio_resid -= DIRHDSIZ; |
| 2204 | uiop->uio_iov->iov_base += DIRHDSIZ; |
| 2205 | uiop->uio_iov->iov_len -= DIRHDSIZ; |
| 2206 | nfsm_mtouio(uiop, len); |
| 2207 | cp = uiop->uio_iov->iov_base; |
| 2208 | tlen -= len; |
| 2209 | *cp = '\0'; /* null terminate */ |
| 2210 | uiop->uio_iov->iov_base += tlen; |
| 2211 | uiop->uio_iov->iov_len -= tlen; |
| 2212 | uiop->uio_offset += tlen; |
| 2213 | uiop->uio_resid -= tlen; |
| 2214 | } else |
| 2215 | nfsm_adv(nfsm_rndup(len)); |
| 2216 | if (v3) { |
| 2217 | nfsm_dissect(tl, u_int32_t *, |
| 2218 | 3 * NFSX_UNSIGNED); |
| 2219 | } else { |
| 2220 | nfsm_dissect(tl, u_int32_t *, |
| 2221 | 2 * NFSX_UNSIGNED); |
| 2222 | } |
| 2223 | if (bigenough) { |
| 2224 | cookie.nfsuquad[0] = *tl++; |
| 2225 | if (v3) |
| 2226 | cookie.nfsuquad[1] = *tl++; |
| 2227 | } else if (v3) |
| 2228 | tl += 2; |
| 2229 | else |
| 2230 | tl++; |
| 2231 | more_dirs = fxdr_unsigned(int, *tl); |
| 2232 | } |
| 2233 | /* |
| 2234 | * If at end of rpc data, get the eof boolean |
| 2235 | */ |
| 2236 | if (!more_dirs) { |
| 2237 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2238 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2239 | } |
| 2240 | m_freem(mrep); |
| 2241 | } |
| 2242 | /* |
| 2243 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ |
| 2244 | * by increasing d_reclen for the last record. |
| 2245 | */ |
| 2246 | if (blksiz > 0) { |
| 2247 | left = DIRBLKSIZ - blksiz; |
| 2248 | dp->d_reclen += left; |
| 2249 | uiop->uio_iov->iov_base += left; |
| 2250 | uiop->uio_iov->iov_len -= left; |
| 2251 | uiop->uio_offset += left; |
| 2252 | uiop->uio_resid -= left; |
| 2253 | } |
| 2254 | |
| 2255 | /* |
| 2256 | * We are now either at the end of the directory or have filled the |
| 2257 | * block. |
| 2258 | */ |
| 2259 | if (bigenough) |
| 2260 | dnp->n_direofoffset = uiop->uio_offset; |
| 2261 | else { |
| 2262 | if (uiop->uio_resid > 0) |
| 2263 | printf("EEK! readdirrpc resid > 0\n"); |
| 2264 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
| 2265 | *cookiep = cookie; |
| 2266 | } |
| 2267 | nfsmout: |
| 2268 | return (error); |
| 2269 | } |
| 2270 | |
| 2271 | /* |
| 2272 | * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). |
| 2273 | */ |
| 2274 | int |
| 2275 | nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop) |
| 2276 | { |
| 2277 | int len, left; |
| 2278 | struct dirent *dp; |
| 2279 | u_int32_t *tl; |
| 2280 | caddr_t cp; |
| 2281 | int32_t t1, t2; |
| 2282 | struct vnode *newvp; |
| 2283 | nfsuint64 *cookiep; |
| 2284 | caddr_t bpos, dpos, cp2, dpossav1, dpossav2; |
| 2285 | struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; |
| 2286 | struct nameidata nami, *ndp = &nami; |
| 2287 | struct componentname *cnp = &ndp->ni_cnd; |
| 2288 | nfsuint64 cookie; |
| 2289 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2290 | struct nfsnode *dnp = VTONFS(vp), *np; |
| 2291 | nfsfh_t *fhp; |
| 2292 | u_quad_t fileno; |
| 2293 | int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; |
| 2294 | int attrflag, fhsize; |
| 2295 | |
| 2296 | #ifndef nolint |
| 2297 | dp = (struct dirent *)0; |
| 2298 | #endif |
| 2299 | #ifndef DIAGNOSTIC |
| 2300 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || |
| 2301 | (uiop->uio_resid & (DIRBLKSIZ - 1))) |
| 2302 | panic("nfs readdirplusrpc bad uio"); |
| 2303 | #endif |
| 2304 | ndp->ni_dvp = vp; |
| 2305 | newvp = NULLVP; |
| 2306 | |
| 2307 | /* |
| 2308 | * If there is no cookie, assume directory was stale. |
| 2309 | */ |
| 2310 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); |
| 2311 | if (cookiep) |
| 2312 | cookie = *cookiep; |
| 2313 | else |
| 2314 | return (NFSERR_BAD_COOKIE); |
| 2315 | /* |
| 2316 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2317 | * truncated to a multiple of DIRBLKSIZ. |
| 2318 | * The stopping criteria is EOF or buffer full. |
| 2319 | */ |
| 2320 | while (more_dirs && bigenough) { |
| 2321 | nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; |
| 2322 | nfsm_reqhead(vp, NFSPROC_READDIRPLUS, |
| 2323 | NFSX_FH(1) + 6 * NFSX_UNSIGNED); |
| 2324 | nfsm_fhtom(vp, 1); |
| 2325 | nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); |
| 2326 | *tl++ = cookie.nfsuquad[0]; |
| 2327 | *tl++ = cookie.nfsuquad[1]; |
| 2328 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2329 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2330 | *tl++ = txdr_unsigned(nmp->nm_readdirsize); |
| 2331 | *tl = txdr_unsigned(nmp->nm_rsize); |
| 2332 | nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 2333 | nfsm_postop_attr(vp, attrflag); |
| 2334 | if (error) { |
| 2335 | m_freem(mrep); |
| 2336 | goto nfsmout; |
| 2337 | } |
| 2338 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2339 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2340 | dnp->n_cookieverf.nfsuquad[1] = *tl++; |
| 2341 | more_dirs = fxdr_unsigned(int, *tl); |
| 2342 | |
| 2343 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2344 | while (more_dirs && bigenough) { |
| 2345 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2346 | fileno = fxdr_hyper(tl); |
| 2347 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2348 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2349 | error = EBADRPC; |
| 2350 | m_freem(mrep); |
| 2351 | goto nfsmout; |
| 2352 | } |
| 2353 | tlen = nfsm_rndup(len); |
| 2354 | if (tlen == len) |
| 2355 | tlen += 4; /* To ensure null termination*/ |
| 2356 | left = DIRBLKSIZ - blksiz; |
| 2357 | if ((tlen + DIRHDSIZ) > left) { |
| 2358 | dp->d_reclen += left; |
| 2359 | uiop->uio_iov->iov_base += left; |
| 2360 | uiop->uio_iov->iov_len -= left; |
| 2361 | uiop->uio_offset += left; |
| 2362 | uiop->uio_resid -= left; |
| 2363 | blksiz = 0; |
| 2364 | } |
| 2365 | if ((tlen + DIRHDSIZ) > uiop->uio_resid) |
| 2366 | bigenough = 0; |
| 2367 | if (bigenough) { |
| 2368 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2369 | dp->d_fileno = (int)fileno; |
| 2370 | dp->d_namlen = len; |
| 2371 | dp->d_reclen = tlen + DIRHDSIZ; |
| 2372 | dp->d_type = DT_UNKNOWN; |
| 2373 | blksiz += dp->d_reclen; |
| 2374 | if (blksiz == DIRBLKSIZ) |
| 2375 | blksiz = 0; |
| 2376 | uiop->uio_offset += DIRHDSIZ; |
| 2377 | uiop->uio_resid -= DIRHDSIZ; |
| 2378 | uiop->uio_iov->iov_base += DIRHDSIZ; |
| 2379 | uiop->uio_iov->iov_len -= DIRHDSIZ; |
| 2380 | cnp->cn_nameptr = uiop->uio_iov->iov_base; |
| 2381 | cnp->cn_namelen = len; |
| 2382 | nfsm_mtouio(uiop, len); |
| 2383 | cp = uiop->uio_iov->iov_base; |
| 2384 | tlen -= len; |
| 2385 | *cp = '\0'; |
| 2386 | uiop->uio_iov->iov_base += tlen; |
| 2387 | uiop->uio_iov->iov_len -= tlen; |
| 2388 | uiop->uio_offset += tlen; |
| 2389 | uiop->uio_resid -= tlen; |
| 2390 | } else |
| 2391 | nfsm_adv(nfsm_rndup(len)); |
| 2392 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2393 | if (bigenough) { |
| 2394 | cookie.nfsuquad[0] = *tl++; |
| 2395 | cookie.nfsuquad[1] = *tl++; |
| 2396 | } else |
| 2397 | tl += 2; |
| 2398 | |
| 2399 | /* |
| 2400 | * Since the attributes are before the file handle |
| 2401 | * (sigh), we must skip over the attributes and then |
| 2402 | * come back and get them. |
| 2403 | */ |
| 2404 | attrflag = fxdr_unsigned(int, *tl); |
| 2405 | if (attrflag) { |
| 2406 | dpossav1 = dpos; |
| 2407 | mdsav1 = md; |
| 2408 | nfsm_adv(NFSX_V3FATTR); |
| 2409 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2410 | doit = fxdr_unsigned(int, *tl); |
| 2411 | if (doit) { |
| 2412 | nfsm_getfh(fhp, fhsize, 1); |
| 2413 | if (NFS_CMPFH(dnp, fhp, fhsize)) { |
| 2414 | vref(vp); |
| 2415 | newvp = vp; |
| 2416 | np = dnp; |
| 2417 | } else { |
| 2418 | error = nfs_nget(vp->v_mount, fhp, |
| 2419 | fhsize, &np); |
| 2420 | if (error) |
| 2421 | doit = 0; |
| 2422 | else |
| 2423 | newvp = NFSTOV(np); |
| 2424 | } |
| 2425 | } |
| 2426 | if (doit && bigenough) { |
| 2427 | dpossav2 = dpos; |
| 2428 | dpos = dpossav1; |
| 2429 | mdsav2 = md; |
| 2430 | md = mdsav1; |
| 2431 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 2432 | dpos = dpossav2; |
| 2433 | md = mdsav2; |
| 2434 | dp->d_type = |
| 2435 | IFTODT(VTTOIF(np->n_vattr.va_type)); |
| 2436 | ndp->ni_vp = newvp; |
| 2437 | cache_enter(ndp->ni_dvp, NCPNULL, ndp->ni_vp, cnp); |
| 2438 | } |
| 2439 | } else { |
| 2440 | /* Just skip over the file handle */ |
| 2441 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2442 | i = fxdr_unsigned(int, *tl); |
| 2443 | nfsm_adv(nfsm_rndup(i)); |
| 2444 | } |
| 2445 | if (newvp != NULLVP) { |
| 2446 | if (newvp == vp) |
| 2447 | vrele(newvp); |
| 2448 | else |
| 2449 | vput(newvp); |
| 2450 | newvp = NULLVP; |
| 2451 | } |
| 2452 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2453 | more_dirs = fxdr_unsigned(int, *tl); |
| 2454 | } |
| 2455 | /* |
| 2456 | * If at end of rpc data, get the eof boolean |
| 2457 | */ |
| 2458 | if (!more_dirs) { |
| 2459 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2460 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2461 | } |
| 2462 | m_freem(mrep); |
| 2463 | } |
| 2464 | /* |
| 2465 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ |
| 2466 | * by increasing d_reclen for the last record. |
| 2467 | */ |
| 2468 | if (blksiz > 0) { |
| 2469 | left = DIRBLKSIZ - blksiz; |
| 2470 | dp->d_reclen += left; |
| 2471 | uiop->uio_iov->iov_base += left; |
| 2472 | uiop->uio_iov->iov_len -= left; |
| 2473 | uiop->uio_offset += left; |
| 2474 | uiop->uio_resid -= left; |
| 2475 | } |
| 2476 | |
| 2477 | /* |
| 2478 | * We are now either at the end of the directory or have filled the |
| 2479 | * block. |
| 2480 | */ |
| 2481 | if (bigenough) |
| 2482 | dnp->n_direofoffset = uiop->uio_offset; |
| 2483 | else { |
| 2484 | if (uiop->uio_resid > 0) |
| 2485 | printf("EEK! readdirplusrpc resid > 0\n"); |
| 2486 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
| 2487 | *cookiep = cookie; |
| 2488 | } |
| 2489 | nfsmout: |
| 2490 | if (newvp != NULLVP) { |
| 2491 | if (newvp == vp) |
| 2492 | vrele(newvp); |
| 2493 | else |
| 2494 | vput(newvp); |
| 2495 | newvp = NULLVP; |
| 2496 | } |
| 2497 | return (error); |
| 2498 | } |
| 2499 | |
| 2500 | /* |
| 2501 | * Silly rename. To make the NFS filesystem that is stateless look a little |
| 2502 | * more like the "ufs" a remove of an active vnode is translated to a rename |
| 2503 | * to a funny looking filename that is removed by nfs_inactive on the |
| 2504 | * nfsnode. There is the potential for another process on a different client |
| 2505 | * to create the same funny name between the nfs_lookitup() fails and the |
| 2506 | * nfs_rename() completes, but... |
| 2507 | */ |
| 2508 | static int |
| 2509 | nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) |
| 2510 | { |
| 2511 | struct sillyrename *sp; |
| 2512 | struct nfsnode *np; |
| 2513 | int error; |
| 2514 | |
| 2515 | cache_purge(dvp); |
| 2516 | np = VTONFS(vp); |
| 2517 | #ifndef DIAGNOSTIC |
| 2518 | if (vp->v_type == VDIR) |
| 2519 | panic("nfs: sillyrename dir"); |
| 2520 | #endif |
| 2521 | MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), |
| 2522 | M_NFSREQ, M_WAITOK); |
| 2523 | sp->s_cred = crdup(cnp->cn_cred); |
| 2524 | sp->s_dvp = dvp; |
| 2525 | vref(dvp); |
| 2526 | |
| 2527 | /* Fudge together a funny name */ |
| 2528 | sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td); |
| 2529 | |
| 2530 | /* Try lookitups until we get one that isn't there */ |
| 2531 | while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2532 | cnp->cn_td, (struct nfsnode **)0) == 0) { |
| 2533 | sp->s_name[4]++; |
| 2534 | if (sp->s_name[4] > 'z') { |
| 2535 | error = EINVAL; |
| 2536 | goto bad; |
| 2537 | } |
| 2538 | } |
| 2539 | error = nfs_renameit(dvp, cnp, sp); |
| 2540 | if (error) |
| 2541 | goto bad; |
| 2542 | error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2543 | cnp->cn_td, &np); |
| 2544 | np->n_sillyrename = sp; |
| 2545 | return (0); |
| 2546 | bad: |
| 2547 | vrele(sp->s_dvp); |
| 2548 | crfree(sp->s_cred); |
| 2549 | free((caddr_t)sp, M_NFSREQ); |
| 2550 | return (error); |
| 2551 | } |
| 2552 | |
| 2553 | /* |
| 2554 | * Look up a file name and optionally either update the file handle or |
| 2555 | * allocate an nfsnode, depending on the value of npp. |
| 2556 | * npp == NULL --> just do the lookup |
| 2557 | * *npp == NULL --> allocate a new nfsnode and make sure attributes are |
| 2558 | * handled too |
| 2559 | * *npp != NULL --> update the file handle in the vnode |
| 2560 | */ |
| 2561 | static int |
| 2562 | nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, |
| 2563 | struct thread *td, struct nfsnode **npp) |
| 2564 | { |
| 2565 | u_int32_t *tl; |
| 2566 | caddr_t cp; |
| 2567 | int32_t t1, t2; |
| 2568 | struct vnode *newvp = (struct vnode *)0; |
| 2569 | struct nfsnode *np, *dnp = VTONFS(dvp); |
| 2570 | caddr_t bpos, dpos, cp2; |
| 2571 | int error = 0, fhlen, attrflag; |
| 2572 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2573 | nfsfh_t *nfhp; |
| 2574 | int v3 = NFS_ISV3(dvp); |
| 2575 | |
| 2576 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 2577 | nfsm_reqhead(dvp, NFSPROC_LOOKUP, |
| 2578 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 2579 | nfsm_fhtom(dvp, v3); |
| 2580 | nfsm_strtom(name, len, NFS_MAXNAMLEN); |
| 2581 | nfsm_request(dvp, NFSPROC_LOOKUP, td, cred); |
| 2582 | if (npp && !error) { |
| 2583 | nfsm_getfh(nfhp, fhlen, v3); |
| 2584 | if (*npp) { |
| 2585 | np = *npp; |
| 2586 | if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { |
| 2587 | free((caddr_t)np->n_fhp, M_NFSBIGFH); |
| 2588 | np->n_fhp = &np->n_fh; |
| 2589 | } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) |
| 2590 | np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); |
| 2591 | bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); |
| 2592 | np->n_fhsize = fhlen; |
| 2593 | newvp = NFSTOV(np); |
| 2594 | } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { |
| 2595 | vref(dvp); |
| 2596 | newvp = dvp; |
| 2597 | } else { |
| 2598 | error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); |
| 2599 | if (error) { |
| 2600 | m_freem(mrep); |
| 2601 | return (error); |
| 2602 | } |
| 2603 | newvp = NFSTOV(np); |
| 2604 | } |
| 2605 | if (v3) { |
| 2606 | nfsm_postop_attr(newvp, attrflag); |
| 2607 | if (!attrflag && *npp == NULL) { |
| 2608 | m_freem(mrep); |
| 2609 | if (newvp == dvp) |
| 2610 | vrele(newvp); |
| 2611 | else |
| 2612 | vput(newvp); |
| 2613 | return (ENOENT); |
| 2614 | } |
| 2615 | } else |
| 2616 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 2617 | } |
| 2618 | m_freem(mrep); |
| 2619 | nfsmout: |
| 2620 | if (npp && *npp == NULL) { |
| 2621 | if (error) { |
| 2622 | if (newvp) { |
| 2623 | if (newvp == dvp) |
| 2624 | vrele(newvp); |
| 2625 | else |
| 2626 | vput(newvp); |
| 2627 | } |
| 2628 | } else |
| 2629 | *npp = np; |
| 2630 | } |
| 2631 | return (error); |
| 2632 | } |
| 2633 | |
| 2634 | /* |
| 2635 | * Nfs Version 3 commit rpc |
| 2636 | */ |
| 2637 | int |
| 2638 | nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) |
| 2639 | { |
| 2640 | caddr_t cp; |
| 2641 | u_int32_t *tl; |
| 2642 | int32_t t1, t2; |
| 2643 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2644 | caddr_t bpos, dpos, cp2; |
| 2645 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2646 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2647 | |
| 2648 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) |
| 2649 | return (0); |
| 2650 | nfsstats.rpccnt[NFSPROC_COMMIT]++; |
| 2651 | nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); |
| 2652 | nfsm_fhtom(vp, 1); |
| 2653 | nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2654 | txdr_hyper(offset, tl); |
| 2655 | tl += 2; |
| 2656 | *tl = txdr_unsigned(cnt); |
| 2657 | nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE)); |
| 2658 | nfsm_wcc_data(vp, wccflag); |
| 2659 | if (!error) { |
| 2660 | nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); |
| 2661 | if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, |
| 2662 | NFSX_V3WRITEVERF)) { |
| 2663 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 2664 | NFSX_V3WRITEVERF); |
| 2665 | error = NFSERR_STALEWRITEVERF; |
| 2666 | } |
| 2667 | } |
| 2668 | m_freem(mrep); |
| 2669 | nfsmout: |
| 2670 | return (error); |
| 2671 | } |
| 2672 | |
| 2673 | /* |
| 2674 | * Kludge City.. |
| 2675 | * - make nfs_bmap() essentially a no-op that does no translation |
| 2676 | * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc |
| 2677 | * (Maybe I could use the process's page mapping, but I was concerned that |
| 2678 | * Kernel Write might not be enabled and also figured copyout() would do |
| 2679 | * a lot more work than bcopy() and also it currently happens in the |
| 2680 | * context of the swapper process (2). |
| 2681 | * |
| 2682 | * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp, |
| 2683 | * daddr_t *a_bnp, int *a_runp, int *a_runb) |
| 2684 | */ |
| 2685 | static int |
| 2686 | nfs_bmap(struct vop_bmap_args *ap) |
| 2687 | { |
| 2688 | struct vnode *vp = ap->a_vp; |
| 2689 | |
| 2690 | if (ap->a_vpp != NULL) |
| 2691 | *ap->a_vpp = vp; |
| 2692 | if (ap->a_bnp != NULL) |
| 2693 | *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); |
| 2694 | if (ap->a_runp != NULL) |
| 2695 | *ap->a_runp = 0; |
| 2696 | if (ap->a_runb != NULL) |
| 2697 | *ap->a_runb = 0; |
| 2698 | return (0); |
| 2699 | } |
| 2700 | |
| 2701 | /* |
| 2702 | * Strategy routine. |
| 2703 | * For async requests when nfsiod(s) are running, queue the request by |
| 2704 | * calling nfs_asyncio(), otherwise just all nfs_doio() to do the |
| 2705 | * request. |
| 2706 | */ |
| 2707 | static int |
| 2708 | nfs_strategy(struct vop_strategy_args *ap) |
| 2709 | { |
| 2710 | struct buf *bp = ap->a_bp; |
| 2711 | struct thread *td; |
| 2712 | int error = 0; |
| 2713 | |
| 2714 | KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); |
| 2715 | KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp)); |
| 2716 | |
| 2717 | if (bp->b_flags & B_PHYS) |
| 2718 | panic("nfs physio"); |
| 2719 | |
| 2720 | if (bp->b_flags & B_ASYNC) |
| 2721 | td = NULL; |
| 2722 | else |
| 2723 | td = curthread; /* XXX */ |
| 2724 | |
| 2725 | /* |
| 2726 | * If the op is asynchronous and an i/o daemon is waiting |
| 2727 | * queue the request, wake it up and wait for completion |
| 2728 | * otherwise just do it ourselves. |
| 2729 | */ |
| 2730 | if ((bp->b_flags & B_ASYNC) == 0 || |
| 2731 | nfs_asyncio(bp, td)) |
| 2732 | error = nfs_doio(bp, td); |
| 2733 | return (error); |
| 2734 | } |
| 2735 | |
| 2736 | /* |
| 2737 | * Mmap a file |
| 2738 | * |
| 2739 | * NB Currently unsupported. |
| 2740 | * |
| 2741 | * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred, |
| 2742 | * struct thread *a_td) |
| 2743 | */ |
| 2744 | /* ARGSUSED */ |
| 2745 | static int |
| 2746 | nfs_mmap(struct vop_mmap_args *ap) |
| 2747 | { |
| 2748 | return (EINVAL); |
| 2749 | } |
| 2750 | |
| 2751 | /* |
| 2752 | * fsync vnode op. Just call nfs_flush() with commit == 1. |
| 2753 | * |
| 2754 | * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp, |
| 2755 | * struct ucred * a_cred, int a_waitfor, struct thread *a_td) |
| 2756 | */ |
| 2757 | /* ARGSUSED */ |
| 2758 | static int |
| 2759 | nfs_fsync(struct vop_fsync_args *ap) |
| 2760 | { |
| 2761 | return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1)); |
| 2762 | } |
| 2763 | |
| 2764 | /* |
| 2765 | * Flush all the blocks associated with a vnode. |
| 2766 | * Walk through the buffer pool and push any dirty pages |
| 2767 | * associated with the vnode. |
| 2768 | */ |
| 2769 | static int |
| 2770 | nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) |
| 2771 | { |
| 2772 | struct nfsnode *np = VTONFS(vp); |
| 2773 | struct buf *bp; |
| 2774 | int i; |
| 2775 | struct buf *nbp; |
| 2776 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2777 | int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; |
| 2778 | int passone = 1; |
| 2779 | u_quad_t off, endoff, toff; |
| 2780 | struct buf **bvec = NULL; |
| 2781 | #ifndef NFS_COMMITBVECSIZ |
| 2782 | #define NFS_COMMITBVECSIZ 20 |
| 2783 | #endif |
| 2784 | struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; |
| 2785 | int bvecsize = 0, bveccount; |
| 2786 | |
| 2787 | if (nmp->nm_flag & NFSMNT_INT) |
| 2788 | slpflag = PCATCH; |
| 2789 | if (!commit) |
| 2790 | passone = 0; |
| 2791 | /* |
| 2792 | * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the |
| 2793 | * server, but nas not been committed to stable storage on the server |
| 2794 | * yet. On the first pass, the byte range is worked out and the commit |
| 2795 | * rpc is done. On the second pass, nfs_writebp() is called to do the |
| 2796 | * job. |
| 2797 | */ |
| 2798 | again: |
| 2799 | off = (u_quad_t)-1; |
| 2800 | endoff = 0; |
| 2801 | bvecpos = 0; |
| 2802 | if (NFS_ISV3(vp) && commit) { |
| 2803 | s = splbio(); |
| 2804 | /* |
| 2805 | * Count up how many buffers waiting for a commit. |
| 2806 | */ |
| 2807 | bveccount = 0; |
| 2808 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2809 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2810 | if (BUF_REFCNT(bp) == 0 && |
| 2811 | (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) |
| 2812 | == (B_DELWRI | B_NEEDCOMMIT)) |
| 2813 | bveccount++; |
| 2814 | } |
| 2815 | /* |
| 2816 | * Allocate space to remember the list of bufs to commit. It is |
| 2817 | * important to use M_NOWAIT here to avoid a race with nfs_write. |
| 2818 | * If we can't get memory (for whatever reason), we will end up |
| 2819 | * committing the buffers one-by-one in the loop below. |
| 2820 | */ |
| 2821 | if (bvec != NULL && bvec != bvec_on_stack) |
| 2822 | free(bvec, M_TEMP); |
| 2823 | if (bveccount > NFS_COMMITBVECSIZ) { |
| 2824 | bvec = (struct buf **) |
| 2825 | malloc(bveccount * sizeof(struct buf *), |
| 2826 | M_TEMP, M_NOWAIT); |
| 2827 | if (bvec == NULL) { |
| 2828 | bvec = bvec_on_stack; |
| 2829 | bvecsize = NFS_COMMITBVECSIZ; |
| 2830 | } else |
| 2831 | bvecsize = bveccount; |
| 2832 | } else { |
| 2833 | bvec = bvec_on_stack; |
| 2834 | bvecsize = NFS_COMMITBVECSIZ; |
| 2835 | } |
| 2836 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2837 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2838 | if (bvecpos >= bvecsize) |
| 2839 | break; |
| 2840 | if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != |
| 2841 | (B_DELWRI | B_NEEDCOMMIT) || |
| 2842 | BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) |
| 2843 | continue; |
| 2844 | bremfree(bp); |
| 2845 | /* |
| 2846 | * NOTE: we are not clearing B_DONE here, so we have |
| 2847 | * to do it later on in this routine if we intend to |
| 2848 | * initiate I/O on the bp. |
| 2849 | * |
| 2850 | * Note: to avoid loopback deadlocks, we do not |
| 2851 | * assign b_runningbufspace. |
| 2852 | */ |
| 2853 | bp->b_flags |= B_WRITEINPROG; |
| 2854 | vfs_busy_pages(bp, 1); |
| 2855 | |
| 2856 | /* |
| 2857 | * bp is protected by being locked, but nbp is not |
| 2858 | * and vfs_busy_pages() may sleep. We have to |
| 2859 | * recalculate nbp. |
| 2860 | */ |
| 2861 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2862 | |
| 2863 | /* |
| 2864 | * A list of these buffers is kept so that the |
| 2865 | * second loop knows which buffers have actually |
| 2866 | * been committed. This is necessary, since there |
| 2867 | * may be a race between the commit rpc and new |
| 2868 | * uncommitted writes on the file. |
| 2869 | */ |
| 2870 | bvec[bvecpos++] = bp; |
| 2871 | toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + |
| 2872 | bp->b_dirtyoff; |
| 2873 | if (toff < off) |
| 2874 | off = toff; |
| 2875 | toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); |
| 2876 | if (toff > endoff) |
| 2877 | endoff = toff; |
| 2878 | } |
| 2879 | splx(s); |
| 2880 | } |
| 2881 | if (bvecpos > 0) { |
| 2882 | /* |
| 2883 | * Commit data on the server, as required. Note that |
| 2884 | * nfs_commit will use the vnode's cred for the commit. |
| 2885 | */ |
| 2886 | retv = nfs_commit(vp, off, (int)(endoff - off), td); |
| 2887 | |
| 2888 | if (retv == NFSERR_STALEWRITEVERF) |
| 2889 | nfs_clearcommit(vp->v_mount); |
| 2890 | |
| 2891 | /* |
| 2892 | * Now, either mark the blocks I/O done or mark the |
| 2893 | * blocks dirty, depending on whether the commit |
| 2894 | * succeeded. |
| 2895 | */ |
| 2896 | for (i = 0; i < bvecpos; i++) { |
| 2897 | bp = bvec[i]; |
| 2898 | bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK); |
| 2899 | if (retv) { |
| 2900 | /* |
| 2901 | * Error, leave B_DELWRI intact |
| 2902 | */ |
| 2903 | vfs_unbusy_pages(bp); |
| 2904 | brelse(bp); |
| 2905 | } else { |
| 2906 | /* |
| 2907 | * Success, remove B_DELWRI ( bundirty() ). |
| 2908 | * |
| 2909 | * b_dirtyoff/b_dirtyend seem to be NFS |
| 2910 | * specific. We should probably move that |
| 2911 | * into bundirty(). XXX |
| 2912 | */ |
| 2913 | s = splbio(); |
| 2914 | vp->v_numoutput++; |
| 2915 | bp->b_flags |= B_ASYNC; |
| 2916 | bundirty(bp); |
| 2917 | bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); |
| 2918 | bp->b_dirtyoff = bp->b_dirtyend = 0; |
| 2919 | splx(s); |
| 2920 | biodone(bp); |
| 2921 | } |
| 2922 | } |
| 2923 | } |
| 2924 | |
| 2925 | /* |
| 2926 | * Start/do any write(s) that are required. |
| 2927 | */ |
| 2928 | loop: |
| 2929 | s = splbio(); |
| 2930 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2931 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2932 | if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) { |
| 2933 | if (waitfor != MNT_WAIT || passone) |
| 2934 | continue; |
| 2935 | error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL, |
| 2936 | "nfsfsync", slpflag, slptimeo); |
| 2937 | splx(s); |
| 2938 | if (error == 0) |
| 2939 | panic("nfs_fsync: inconsistent lock"); |
| 2940 | if (error == ENOLCK) |
| 2941 | goto loop; |
| 2942 | if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) { |
| 2943 | error = EINTR; |
| 2944 | goto done; |
| 2945 | } |
| 2946 | if (slpflag == PCATCH) { |
| 2947 | slpflag = 0; |
| 2948 | slptimeo = 2 * hz; |
| 2949 | } |
| 2950 | goto loop; |
| 2951 | } |
| 2952 | if ((bp->b_flags & B_DELWRI) == 0) |
| 2953 | panic("nfs_fsync: not dirty"); |
| 2954 | if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { |
| 2955 | BUF_UNLOCK(bp); |
| 2956 | continue; |
| 2957 | } |
| 2958 | bremfree(bp); |
| 2959 | if (passone || !commit) |
| 2960 | bp->b_flags |= B_ASYNC; |
| 2961 | else |
| 2962 | bp->b_flags |= B_ASYNC | B_WRITEINPROG; |
| 2963 | splx(s); |
| 2964 | VOP_BWRITE(bp->b_vp, bp); |
| 2965 | goto loop; |
| 2966 | } |
| 2967 | splx(s); |
| 2968 | if (passone) { |
| 2969 | passone = 0; |
| 2970 | goto again; |
| 2971 | } |
| 2972 | if (waitfor == MNT_WAIT) { |
| 2973 | while (vp->v_numoutput) { |
| 2974 | vp->v_flag |= VBWAIT; |
| 2975 | error = tsleep((caddr_t)&vp->v_numoutput, |
| 2976 | slpflag, "nfsfsync", slptimeo); |
| 2977 | if (error) { |
| 2978 | if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) { |
| 2979 | error = EINTR; |
| 2980 | goto done; |
| 2981 | } |
| 2982 | if (slpflag == PCATCH) { |
| 2983 | slpflag = 0; |
| 2984 | slptimeo = 2 * hz; |
| 2985 | } |
| 2986 | } |
| 2987 | } |
| 2988 | if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) { |
| 2989 | goto loop; |
| 2990 | } |
| 2991 | } |
| 2992 | if (np->n_flag & NWRITEERR) { |
| 2993 | error = np->n_error; |
| 2994 | np->n_flag &= ~NWRITEERR; |
| 2995 | } |
| 2996 | done: |
| 2997 | if (bvec != NULL && bvec != bvec_on_stack) |
| 2998 | free(bvec, M_TEMP); |
| 2999 | return (error); |
| 3000 | } |
| 3001 | |
| 3002 | /* |
| 3003 | * NFS advisory byte-level locks. |
| 3004 | * Currently unsupported. |
| 3005 | * |
| 3006 | * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, |
| 3007 | * int a_flags) |
| 3008 | */ |
| 3009 | static int |
| 3010 | nfs_advlock(struct vop_advlock_args *ap) |
| 3011 | { |
| 3012 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3013 | |
| 3014 | /* |
| 3015 | * The following kludge is to allow diskless support to work |
| 3016 | * until a real NFS lockd is implemented. Basically, just pretend |
| 3017 | * that this is a local lock. |
| 3018 | */ |
| 3019 | return (lf_advlock(ap, &(np->n_lockf), np->n_size)); |
| 3020 | } |
| 3021 | |
| 3022 | /* |
| 3023 | * Print out the contents of an nfsnode. |
| 3024 | * |
| 3025 | * nfs_print(struct vnode *a_vp) |
| 3026 | */ |
| 3027 | static int |
| 3028 | nfs_print(struct vop_print_args *ap) |
| 3029 | { |
| 3030 | struct vnode *vp = ap->a_vp; |
| 3031 | struct nfsnode *np = VTONFS(vp); |
| 3032 | |
| 3033 | printf("tag VT_NFS, fileid %ld fsid 0x%x", |
| 3034 | np->n_vattr.va_fileid, np->n_vattr.va_fsid); |
| 3035 | if (vp->v_type == VFIFO) |
| 3036 | fifo_printinfo(vp); |
| 3037 | printf("\n"); |
| 3038 | return (0); |
| 3039 | } |
| 3040 | |
| 3041 | /* |
| 3042 | * Just call nfs_writebp() with the force argument set to 1. |
| 3043 | * |
| 3044 | * NOTE: B_DONE may or may not be set in a_bp on call. |
| 3045 | * |
| 3046 | * nfs_bwrite(struct vnode *a_bp) |
| 3047 | */ |
| 3048 | static int |
| 3049 | nfs_bwrite(struct vop_bwrite_args *ap) |
| 3050 | { |
| 3051 | return (nfs_writebp(ap->a_bp, 1, curthread)); |
| 3052 | } |
| 3053 | |
| 3054 | /* |
| 3055 | * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless |
| 3056 | * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set |
| 3057 | * B_CACHE if this is a VMIO buffer. |
| 3058 | */ |
| 3059 | int |
| 3060 | nfs_writebp(struct buf *bp, int force, struct thread *td) |
| 3061 | { |
| 3062 | int s; |
| 3063 | int oldflags = bp->b_flags; |
| 3064 | #if 0 |
| 3065 | int retv = 1; |
| 3066 | off_t off; |
| 3067 | #endif |
| 3068 | |
| 3069 | if (BUF_REFCNT(bp) == 0) |
| 3070 | panic("bwrite: buffer is not locked???"); |
| 3071 | |
| 3072 | if (bp->b_flags & B_INVAL) { |
| 3073 | brelse(bp); |
| 3074 | return(0); |
| 3075 | } |
| 3076 | |
| 3077 | bp->b_flags |= B_CACHE; |
| 3078 | |
| 3079 | /* |
| 3080 | * Undirty the bp. We will redirty it later if the I/O fails. |
| 3081 | */ |
| 3082 | |
| 3083 | s = splbio(); |
| 3084 | bundirty(bp); |
| 3085 | bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); |
| 3086 | |
| 3087 | bp->b_vp->v_numoutput++; |
| 3088 | splx(s); |
| 3089 | |
| 3090 | /* |
| 3091 | * Note: to avoid loopback deadlocks, we do not |
| 3092 | * assign b_runningbufspace. |
| 3093 | */ |
| 3094 | vfs_busy_pages(bp, 1); |
| 3095 | |
| 3096 | if (force) |
| 3097 | bp->b_flags |= B_WRITEINPROG; |
| 3098 | BUF_KERNPROC(bp); |
| 3099 | VOP_STRATEGY(bp->b_vp, bp); |
| 3100 | |
| 3101 | if( (oldflags & B_ASYNC) == 0) { |
| 3102 | int rtval = biowait(bp); |
| 3103 | |
| 3104 | if (oldflags & B_DELWRI) { |
| 3105 | s = splbio(); |
| 3106 | reassignbuf(bp, bp->b_vp); |
| 3107 | splx(s); |
| 3108 | } |
| 3109 | |
| 3110 | brelse(bp); |
| 3111 | return (rtval); |
| 3112 | } |
| 3113 | |
| 3114 | return (0); |
| 3115 | } |
| 3116 | |
| 3117 | /* |
| 3118 | * nfs special file access vnode op. |
| 3119 | * Essentially just get vattr and then imitate iaccess() since the device is |
| 3120 | * local to the client. |
| 3121 | * |
| 3122 | * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 3123 | * struct thread *a_td) |
| 3124 | */ |
| 3125 | static int |
| 3126 | nfsspec_access(struct vop_access_args *ap) |
| 3127 | { |
| 3128 | struct vattr *vap; |
| 3129 | gid_t *gp; |
| 3130 | struct ucred *cred = ap->a_cred; |
| 3131 | struct vnode *vp = ap->a_vp; |
| 3132 | mode_t mode = ap->a_mode; |
| 3133 | struct vattr vattr; |
| 3134 | int i; |
| 3135 | int error; |
| 3136 | |
| 3137 | /* |
| 3138 | * Disallow write attempts on filesystems mounted read-only; |
| 3139 | * unless the file is a socket, fifo, or a block or character |
| 3140 | * device resident on the filesystem. |
| 3141 | */ |
| 3142 | if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 3143 | switch (vp->v_type) { |
| 3144 | case VREG: |
| 3145 | case VDIR: |
| 3146 | case VLNK: |
| 3147 | return (EROFS); |
| 3148 | default: |
| 3149 | break; |
| 3150 | } |
| 3151 | } |
| 3152 | /* |
| 3153 | * If you're the super-user, |
| 3154 | * you always get access. |
| 3155 | */ |
| 3156 | if (cred->cr_uid == 0) |
| 3157 | return (0); |
| 3158 | vap = &vattr; |
| 3159 | error = VOP_GETATTR(vp, vap, ap->a_td); |
| 3160 | if (error) |
| 3161 | return (error); |
| 3162 | /* |
| 3163 | * Access check is based on only one of owner, group, public. |
| 3164 | * If not owner, then check group. If not a member of the |
| 3165 | * group, then check public access. |
| 3166 | */ |
| 3167 | if (cred->cr_uid != vap->va_uid) { |
| 3168 | mode >>= 3; |
| 3169 | gp = cred->cr_groups; |
| 3170 | for (i = 0; i < cred->cr_ngroups; i++, gp++) |
| 3171 | if (vap->va_gid == *gp) |
| 3172 | goto found; |
| 3173 | mode >>= 3; |
| 3174 | found: |
| 3175 | ; |
| 3176 | } |
| 3177 | error = (vap->va_mode & mode) == mode ? 0 : EACCES; |
| 3178 | return (error); |
| 3179 | } |
| 3180 | |
| 3181 | /* |
| 3182 | * Read wrapper for special devices. |
| 3183 | * |
| 3184 | * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3185 | * struct ucred *a_cred) |
| 3186 | */ |
| 3187 | static int |
| 3188 | nfsspec_read(struct vop_read_args *ap) |
| 3189 | { |
| 3190 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3191 | |
| 3192 | /* |
| 3193 | * Set access flag. |
| 3194 | */ |
| 3195 | np->n_flag |= NACC; |
| 3196 | getnanotime(&np->n_atim); |
| 3197 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3198 | } |
| 3199 | |
| 3200 | /* |
| 3201 | * Write wrapper for special devices. |
| 3202 | * |
| 3203 | * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3204 | * struct ucred *a_cred) |
| 3205 | */ |
| 3206 | static int |
| 3207 | nfsspec_write(struct vop_write_args *ap) |
| 3208 | { |
| 3209 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3210 | |
| 3211 | /* |
| 3212 | * Set update flag. |
| 3213 | */ |
| 3214 | np->n_flag |= NUPD; |
| 3215 | getnanotime(&np->n_mtim); |
| 3216 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3217 | } |
| 3218 | |
| 3219 | /* |
| 3220 | * Close wrapper for special devices. |
| 3221 | * |
| 3222 | * Update the times on the nfsnode then do device close. |
| 3223 | * |
| 3224 | * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, |
| 3225 | * struct thread *a_td) |
| 3226 | */ |
| 3227 | static int |
| 3228 | nfsspec_close(struct vop_close_args *ap) |
| 3229 | { |
| 3230 | struct vnode *vp = ap->a_vp; |
| 3231 | struct nfsnode *np = VTONFS(vp); |
| 3232 | struct vattr vattr; |
| 3233 | |
| 3234 | if (np->n_flag & (NACC | NUPD)) { |
| 3235 | np->n_flag |= NCHG; |
| 3236 | if (vp->v_usecount == 1 && |
| 3237 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3238 | VATTR_NULL(&vattr); |
| 3239 | if (np->n_flag & NACC) |
| 3240 | vattr.va_atime = np->n_atim; |
| 3241 | if (np->n_flag & NUPD) |
| 3242 | vattr.va_mtime = np->n_mtim; |
| 3243 | (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td); |
| 3244 | } |
| 3245 | } |
| 3246 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3247 | } |
| 3248 | |
| 3249 | /* |
| 3250 | * Read wrapper for fifos. |
| 3251 | * |
| 3252 | * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3253 | * struct ucred *a_cred) |
| 3254 | */ |
| 3255 | static int |
| 3256 | nfsfifo_read(struct vop_read_args *ap) |
| 3257 | { |
| 3258 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3259 | |
| 3260 | /* |
| 3261 | * Set access flag. |
| 3262 | */ |
| 3263 | np->n_flag |= NACC; |
| 3264 | getnanotime(&np->n_atim); |
| 3265 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3266 | } |
| 3267 | |
| 3268 | /* |
| 3269 | * Write wrapper for fifos. |
| 3270 | * |
| 3271 | * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3272 | * struct ucred *a_cred) |
| 3273 | */ |
| 3274 | static int |
| 3275 | nfsfifo_write(struct vop_write_args *ap) |
| 3276 | { |
| 3277 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3278 | |
| 3279 | /* |
| 3280 | * Set update flag. |
| 3281 | */ |
| 3282 | np->n_flag |= NUPD; |
| 3283 | getnanotime(&np->n_mtim); |
| 3284 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3285 | } |
| 3286 | |
| 3287 | /* |
| 3288 | * Close wrapper for fifos. |
| 3289 | * |
| 3290 | * Update the times on the nfsnode then do fifo close. |
| 3291 | * |
| 3292 | * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td) |
| 3293 | */ |
| 3294 | static int |
| 3295 | nfsfifo_close(struct vop_close_args *ap) |
| 3296 | { |
| 3297 | struct vnode *vp = ap->a_vp; |
| 3298 | struct nfsnode *np = VTONFS(vp); |
| 3299 | struct vattr vattr; |
| 3300 | struct timespec ts; |
| 3301 | |
| 3302 | if (np->n_flag & (NACC | NUPD)) { |
| 3303 | getnanotime(&ts); |
| 3304 | if (np->n_flag & NACC) |
| 3305 | np->n_atim = ts; |
| 3306 | if (np->n_flag & NUPD) |
| 3307 | np->n_mtim = ts; |
| 3308 | np->n_flag |= NCHG; |
| 3309 | if (vp->v_usecount == 1 && |
| 3310 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3311 | VATTR_NULL(&vattr); |
| 3312 | if (np->n_flag & NACC) |
| 3313 | vattr.va_atime = np->n_atim; |
| 3314 | if (np->n_flag & NUPD) |
| 3315 | vattr.va_mtime = np->n_mtim; |
| 3316 | (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td); |
| 3317 | } |
| 3318 | } |
| 3319 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3320 | } |
| 3321 | |