| 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 1.23 2004/05/08 04:11:48 dillon 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 | /* |
| 748 | * np->n_size has already been set to vap->va_size |
| 749 | * in nfs_meta_setsize(). We must set it again since |
| 750 | * nfs_loadattrcache() could be called through |
| 751 | * nfs_meta_setsize() and could modify np->n_size. |
| 752 | * |
| 753 | * (note that nfs_loadattrcache() will have called |
| 754 | * vnode_pager_setsize() for us in that case). |
| 755 | */ |
| 756 | np->n_vattr.va_size = np->n_size = vap->va_size; |
| 757 | }; |
| 758 | } else if ((vap->va_mtime.tv_sec != VNOVAL || |
| 759 | vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) && |
| 760 | vp->v_type == VREG && |
| 761 | (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR) |
| 762 | return (error); |
| 763 | error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td); |
| 764 | if (error && vap->va_size != VNOVAL) { |
| 765 | np->n_size = np->n_vattr.va_size = tsize; |
| 766 | vnode_pager_setsize(vp, np->n_size); |
| 767 | } |
| 768 | return (error); |
| 769 | } |
| 770 | |
| 771 | /* |
| 772 | * Do an nfs setattr rpc. |
| 773 | */ |
| 774 | static int |
| 775 | nfs_setattrrpc(struct vnode *vp, struct vattr *vap, |
| 776 | struct ucred *cred, struct thread *td) |
| 777 | { |
| 778 | struct nfsv2_sattr *sp; |
| 779 | caddr_t cp; |
| 780 | int32_t t1, t2; |
| 781 | caddr_t bpos, dpos, cp2; |
| 782 | u_int32_t *tl; |
| 783 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 784 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 785 | int v3 = NFS_ISV3(vp); |
| 786 | |
| 787 | nfsstats.rpccnt[NFSPROC_SETATTR]++; |
| 788 | nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); |
| 789 | nfsm_fhtom(vp, v3); |
| 790 | if (v3) { |
| 791 | nfsm_v3attrbuild(vap, TRUE); |
| 792 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 793 | *tl = nfs_false; |
| 794 | } else { |
| 795 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 796 | if (vap->va_mode == (mode_t)VNOVAL) |
| 797 | sp->sa_mode = nfs_xdrneg1; |
| 798 | else |
| 799 | sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); |
| 800 | if (vap->va_uid == (uid_t)VNOVAL) |
| 801 | sp->sa_uid = nfs_xdrneg1; |
| 802 | else |
| 803 | sp->sa_uid = txdr_unsigned(vap->va_uid); |
| 804 | if (vap->va_gid == (gid_t)VNOVAL) |
| 805 | sp->sa_gid = nfs_xdrneg1; |
| 806 | else |
| 807 | sp->sa_gid = txdr_unsigned(vap->va_gid); |
| 808 | sp->sa_size = txdr_unsigned(vap->va_size); |
| 809 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 810 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 811 | } |
| 812 | nfsm_request(vp, NFSPROC_SETATTR, td, cred); |
| 813 | if (v3) { |
| 814 | nfsm_wcc_data(vp, wccflag); |
| 815 | } else |
| 816 | nfsm_loadattr(vp, (struct vattr *)0); |
| 817 | m_freem(mrep); |
| 818 | nfsmout: |
| 819 | return (error); |
| 820 | } |
| 821 | |
| 822 | /* |
| 823 | * 'cached' nfs directory lookup |
| 824 | * |
| 825 | * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp, |
| 826 | * struct vnode **a_vpp, struct componentname *a_cnp) |
| 827 | */ |
| 828 | static int |
| 829 | nfs_lookup(struct vop_lookup_args *ap) |
| 830 | { |
| 831 | struct componentname *cnp = ap->a_cnp; |
| 832 | struct vnode *dvp = ap->a_dvp; |
| 833 | struct vnode **vpp = ap->a_vpp; |
| 834 | int flags = cnp->cn_flags; |
| 835 | struct vnode *newvp; |
| 836 | u_int32_t *tl; |
| 837 | caddr_t cp; |
| 838 | int32_t t1, t2; |
| 839 | struct nfsmount *nmp; |
| 840 | caddr_t bpos, dpos, cp2; |
| 841 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 842 | long len; |
| 843 | nfsfh_t *fhp; |
| 844 | struct nfsnode *np; |
| 845 | int lockparent, wantparent, error = 0, attrflag, fhsize; |
| 846 | int v3 = NFS_ISV3(dvp); |
| 847 | struct thread *td = cnp->cn_td; |
| 848 | |
| 849 | /* |
| 850 | * Read-only mount check and directory check. |
| 851 | */ |
| 852 | *vpp = NULLVP; |
| 853 | if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && |
| 854 | (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) |
| 855 | return (EROFS); |
| 856 | |
| 857 | if (dvp->v_type != VDIR) |
| 858 | return (ENOTDIR); |
| 859 | |
| 860 | /* |
| 861 | * Look it up in the cache. Note that ENOENT is only returned if we |
| 862 | * previously entered a negative hit (see later on). The additional |
| 863 | * nfsneg_cache_timeout check causes previously cached results to |
| 864 | * be instantly ignored if the negative caching is turned off. |
| 865 | */ |
| 866 | lockparent = flags & CNP_LOCKPARENT; |
| 867 | wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); |
| 868 | nmp = VFSTONFS(dvp->v_mount); |
| 869 | np = VTONFS(dvp); |
| 870 | error = cache_lookup(dvp, NCPNULL, vpp, NCPPNULL, cnp); |
| 871 | if (error != 0) { |
| 872 | struct vattr vattr; |
| 873 | int vpid; |
| 874 | |
| 875 | if (error == ENOENT && nfsneg_cache_timeout) { |
| 876 | *vpp = NULLVP; |
| 877 | return (error); |
| 878 | } |
| 879 | if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) { |
| 880 | *vpp = NULLVP; |
| 881 | return (error); |
| 882 | } |
| 883 | |
| 884 | newvp = *vpp; |
| 885 | vpid = newvp->v_id; |
| 886 | /* |
| 887 | * See the comment starting `Step through' in ufs/ufs_lookup.c |
| 888 | * for an explanation of the locking protocol |
| 889 | */ |
| 890 | if (dvp == newvp) { |
| 891 | vref(newvp); |
| 892 | error = 0; |
| 893 | } else if (flags & CNP_ISDOTDOT) { |
| 894 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 895 | error = vget(newvp, NULL, LK_EXCLUSIVE, td); |
| 896 | if (!error && lockparent && (flags & CNP_ISLASTCN)) |
| 897 | error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td); |
| 898 | } else { |
| 899 | error = vget(newvp, NULL, LK_EXCLUSIVE, td); |
| 900 | if (!lockparent || error || !(flags & CNP_ISLASTCN)) |
| 901 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 902 | } |
| 903 | if (!error) { |
| 904 | if (vpid == newvp->v_id) { |
| 905 | if (!VOP_GETATTR(newvp, &vattr, td) |
| 906 | && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { |
| 907 | nfsstats.lookupcache_hits++; |
| 908 | if (cnp->cn_nameiop != NAMEI_LOOKUP && |
| 909 | (flags & CNP_ISLASTCN)) |
| 910 | cnp->cn_flags |= CNP_SAVENAME; |
| 911 | return (0); |
| 912 | } |
| 913 | cache_purge(newvp); |
| 914 | } |
| 915 | vput(newvp); |
| 916 | if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN)) |
| 917 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 918 | } |
| 919 | error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td); |
| 920 | *vpp = NULLVP; |
| 921 | if (error) |
| 922 | return (error); |
| 923 | } |
| 924 | |
| 925 | /* |
| 926 | * Cache miss, go the wire. |
| 927 | */ |
| 928 | error = 0; |
| 929 | newvp = NULLVP; |
| 930 | nfsstats.lookupcache_misses++; |
| 931 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 932 | len = cnp->cn_namelen; |
| 933 | nfsm_reqhead(dvp, NFSPROC_LOOKUP, |
| 934 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 935 | nfsm_fhtom(dvp, v3); |
| 936 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 937 | nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred); |
| 938 | if (error) { |
| 939 | /* |
| 940 | * Cache negatve lookups to reduce NFS traffic, but use |
| 941 | * a fast timeout. |
| 942 | */ |
| 943 | if (error == ENOENT && |
| 944 | (cnp->cn_flags & CNP_MAKEENTRY) && |
| 945 | cnp->cn_nameiop == NAMEI_LOOKUP && |
| 946 | nfsneg_cache_timeout) { |
| 947 | int toval = nfsneg_cache_timeout * hz; |
| 948 | if (cnp->cn_flags & CNP_CACHETIMEOUT) { |
| 949 | if (cnp->cn_timeout > toval) |
| 950 | cnp->cn_timeout = toval; |
| 951 | } else { |
| 952 | cnp->cn_flags |= CNP_CACHETIMEOUT; |
| 953 | cnp->cn_timeout = toval; |
| 954 | } |
| 955 | cache_enter(dvp, NCPNULL, NULL, cnp); |
| 956 | } |
| 957 | nfsm_postop_attr(dvp, attrflag); |
| 958 | m_freem(mrep); |
| 959 | goto nfsmout; |
| 960 | } |
| 961 | nfsm_getfh(fhp, fhsize, v3); |
| 962 | |
| 963 | /* |
| 964 | * Handle RENAME case... |
| 965 | */ |
| 966 | if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) { |
| 967 | if (NFS_CMPFH(np, fhp, fhsize)) { |
| 968 | m_freem(mrep); |
| 969 | return (EISDIR); |
| 970 | } |
| 971 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 972 | if (error) { |
| 973 | m_freem(mrep); |
| 974 | return (error); |
| 975 | } |
| 976 | newvp = NFSTOV(np); |
| 977 | if (v3) { |
| 978 | nfsm_postop_attr(newvp, attrflag); |
| 979 | nfsm_postop_attr(dvp, attrflag); |
| 980 | } else |
| 981 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 982 | *vpp = newvp; |
| 983 | m_freem(mrep); |
| 984 | cnp->cn_flags |= CNP_SAVENAME; |
| 985 | if (!lockparent) |
| 986 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 987 | return (0); |
| 988 | } |
| 989 | |
| 990 | if (flags & CNP_ISDOTDOT) { |
| 991 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 992 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 993 | if (error) { |
| 994 | vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); |
| 995 | return (error); |
| 996 | } |
| 997 | newvp = NFSTOV(np); |
| 998 | if (lockparent && (flags & CNP_ISLASTCN) && |
| 999 | (error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td))) { |
| 1000 | vput(newvp); |
| 1001 | return (error); |
| 1002 | } |
| 1003 | } else if (NFS_CMPFH(np, fhp, fhsize)) { |
| 1004 | vref(dvp); |
| 1005 | newvp = dvp; |
| 1006 | } else { |
| 1007 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
| 1008 | if (error) { |
| 1009 | m_freem(mrep); |
| 1010 | return (error); |
| 1011 | } |
| 1012 | if (!lockparent || !(flags & CNP_ISLASTCN)) |
| 1013 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 1014 | newvp = NFSTOV(np); |
| 1015 | } |
| 1016 | if (v3) { |
| 1017 | nfsm_postop_attr(newvp, attrflag); |
| 1018 | nfsm_postop_attr(dvp, attrflag); |
| 1019 | } else |
| 1020 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 1021 | if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN)) |
| 1022 | cnp->cn_flags |= CNP_SAVENAME; |
| 1023 | if ((cnp->cn_flags & CNP_MAKEENTRY) && |
| 1024 | (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) { |
| 1025 | np->n_ctime = np->n_vattr.va_ctime.tv_sec; |
| 1026 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1027 | } |
| 1028 | *vpp = newvp; |
| 1029 | m_freem(mrep); |
| 1030 | nfsmout: |
| 1031 | if (error) { |
| 1032 | if (newvp != NULLVP) { |
| 1033 | vrele(newvp); |
| 1034 | *vpp = NULLVP; |
| 1035 | } |
| 1036 | if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) && |
| 1037 | (flags & CNP_ISLASTCN) && error == ENOENT) { |
| 1038 | if (!lockparent) |
| 1039 | VOP_UNLOCK(dvp, NULL, 0, td); |
| 1040 | if (dvp->v_mount->mnt_flag & MNT_RDONLY) |
| 1041 | error = EROFS; |
| 1042 | else |
| 1043 | error = EJUSTRETURN; |
| 1044 | } |
| 1045 | if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN)) |
| 1046 | cnp->cn_flags |= CNP_SAVENAME; |
| 1047 | } |
| 1048 | return (error); |
| 1049 | } |
| 1050 | |
| 1051 | /* |
| 1052 | * nfs read call. |
| 1053 | * Just call nfs_bioread() to do the work. |
| 1054 | * |
| 1055 | * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 1056 | * struct ucred *a_cred) |
| 1057 | */ |
| 1058 | static int |
| 1059 | nfs_read(struct vop_read_args *ap) |
| 1060 | { |
| 1061 | struct vnode *vp = ap->a_vp; |
| 1062 | |
| 1063 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag)); |
| 1064 | switch (vp->v_type) { |
| 1065 | case VREG: |
| 1066 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag)); |
| 1067 | case VDIR: |
| 1068 | return (EISDIR); |
| 1069 | default: |
| 1070 | return EOPNOTSUPP; |
| 1071 | } |
| 1072 | } |
| 1073 | |
| 1074 | /* |
| 1075 | * nfs readlink call |
| 1076 | * |
| 1077 | * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) |
| 1078 | */ |
| 1079 | static int |
| 1080 | nfs_readlink(struct vop_readlink_args *ap) |
| 1081 | { |
| 1082 | struct vnode *vp = ap->a_vp; |
| 1083 | |
| 1084 | if (vp->v_type != VLNK) |
| 1085 | return (EINVAL); |
| 1086 | return (nfs_bioread(vp, ap->a_uio, 0)); |
| 1087 | } |
| 1088 | |
| 1089 | /* |
| 1090 | * Do a readlink rpc. |
| 1091 | * Called by nfs_doio() from below the buffer cache. |
| 1092 | */ |
| 1093 | int |
| 1094 | nfs_readlinkrpc(struct vnode *vp, struct uio *uiop) |
| 1095 | { |
| 1096 | u_int32_t *tl; |
| 1097 | caddr_t cp; |
| 1098 | int32_t t1, t2; |
| 1099 | caddr_t bpos, dpos, cp2; |
| 1100 | int error = 0, len, attrflag; |
| 1101 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1102 | int v3 = NFS_ISV3(vp); |
| 1103 | |
| 1104 | nfsstats.rpccnt[NFSPROC_READLINK]++; |
| 1105 | nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); |
| 1106 | nfsm_fhtom(vp, v3); |
| 1107 | nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK)); |
| 1108 | if (v3) |
| 1109 | nfsm_postop_attr(vp, attrflag); |
| 1110 | if (!error) { |
| 1111 | nfsm_strsiz(len, NFS_MAXPATHLEN); |
| 1112 | if (len == NFS_MAXPATHLEN) { |
| 1113 | struct nfsnode *np = VTONFS(vp); |
| 1114 | if (np->n_size && np->n_size < NFS_MAXPATHLEN) |
| 1115 | len = np->n_size; |
| 1116 | } |
| 1117 | nfsm_mtouio(uiop, len); |
| 1118 | } |
| 1119 | m_freem(mrep); |
| 1120 | nfsmout: |
| 1121 | return (error); |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * nfs read rpc call |
| 1126 | * Ditto above |
| 1127 | */ |
| 1128 | int |
| 1129 | nfs_readrpc(struct vnode *vp, struct uio *uiop) |
| 1130 | { |
| 1131 | u_int32_t *tl; |
| 1132 | caddr_t cp; |
| 1133 | int32_t t1, t2; |
| 1134 | caddr_t bpos, dpos, cp2; |
| 1135 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1136 | struct nfsmount *nmp; |
| 1137 | int error = 0, len, retlen, tsiz, eof, attrflag; |
| 1138 | int v3 = NFS_ISV3(vp); |
| 1139 | |
| 1140 | #ifndef nolint |
| 1141 | eof = 0; |
| 1142 | #endif |
| 1143 | nmp = VFSTONFS(vp->v_mount); |
| 1144 | tsiz = uiop->uio_resid; |
| 1145 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1146 | return (EFBIG); |
| 1147 | while (tsiz > 0) { |
| 1148 | nfsstats.rpccnt[NFSPROC_READ]++; |
| 1149 | len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; |
| 1150 | nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); |
| 1151 | nfsm_fhtom(vp, v3); |
| 1152 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); |
| 1153 | if (v3) { |
| 1154 | txdr_hyper(uiop->uio_offset, tl); |
| 1155 | *(tl + 2) = txdr_unsigned(len); |
| 1156 | } else { |
| 1157 | *tl++ = txdr_unsigned(uiop->uio_offset); |
| 1158 | *tl++ = txdr_unsigned(len); |
| 1159 | *tl = 0; |
| 1160 | } |
| 1161 | nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 1162 | if (v3) { |
| 1163 | nfsm_postop_attr(vp, attrflag); |
| 1164 | if (error) { |
| 1165 | m_freem(mrep); |
| 1166 | goto nfsmout; |
| 1167 | } |
| 1168 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1169 | eof = fxdr_unsigned(int, *(tl + 1)); |
| 1170 | } else |
| 1171 | nfsm_loadattr(vp, (struct vattr *)0); |
| 1172 | nfsm_strsiz(retlen, nmp->nm_rsize); |
| 1173 | nfsm_mtouio(uiop, retlen); |
| 1174 | m_freem(mrep); |
| 1175 | tsiz -= retlen; |
| 1176 | if (v3) { |
| 1177 | if (eof || retlen == 0) { |
| 1178 | tsiz = 0; |
| 1179 | } |
| 1180 | } else if (retlen < len) { |
| 1181 | tsiz = 0; |
| 1182 | } |
| 1183 | } |
| 1184 | nfsmout: |
| 1185 | return (error); |
| 1186 | } |
| 1187 | |
| 1188 | /* |
| 1189 | * nfs write call |
| 1190 | */ |
| 1191 | int |
| 1192 | nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit) |
| 1193 | { |
| 1194 | u_int32_t *tl; |
| 1195 | caddr_t cp; |
| 1196 | int32_t t1, t2, backup; |
| 1197 | caddr_t bpos, dpos, cp2; |
| 1198 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1199 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 1200 | int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; |
| 1201 | int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; |
| 1202 | |
| 1203 | #ifndef DIAGNOSTIC |
| 1204 | if (uiop->uio_iovcnt != 1) |
| 1205 | panic("nfs: writerpc iovcnt > 1"); |
| 1206 | #endif |
| 1207 | *must_commit = 0; |
| 1208 | tsiz = uiop->uio_resid; |
| 1209 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) |
| 1210 | return (EFBIG); |
| 1211 | while (tsiz > 0) { |
| 1212 | nfsstats.rpccnt[NFSPROC_WRITE]++; |
| 1213 | len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; |
| 1214 | nfsm_reqhead(vp, NFSPROC_WRITE, |
| 1215 | NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); |
| 1216 | nfsm_fhtom(vp, v3); |
| 1217 | if (v3) { |
| 1218 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 1219 | txdr_hyper(uiop->uio_offset, tl); |
| 1220 | tl += 2; |
| 1221 | *tl++ = txdr_unsigned(len); |
| 1222 | *tl++ = txdr_unsigned(*iomode); |
| 1223 | *tl = txdr_unsigned(len); |
| 1224 | } else { |
| 1225 | u_int32_t x; |
| 1226 | |
| 1227 | nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); |
| 1228 | /* Set both "begin" and "current" to non-garbage. */ |
| 1229 | x = txdr_unsigned((u_int32_t)uiop->uio_offset); |
| 1230 | *tl++ = x; /* "begin offset" */ |
| 1231 | *tl++ = x; /* "current offset" */ |
| 1232 | x = txdr_unsigned(len); |
| 1233 | *tl++ = x; /* total to this offset */ |
| 1234 | *tl = x; /* size of this write */ |
| 1235 | } |
| 1236 | nfsm_uiotom(uiop, len); |
| 1237 | nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE)); |
| 1238 | if (v3) { |
| 1239 | wccflag = NFSV3_WCCCHK; |
| 1240 | nfsm_wcc_data(vp, wccflag); |
| 1241 | if (!error) { |
| 1242 | nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED |
| 1243 | + NFSX_V3WRITEVERF); |
| 1244 | rlen = fxdr_unsigned(int, *tl++); |
| 1245 | if (rlen == 0) { |
| 1246 | error = NFSERR_IO; |
| 1247 | m_freem(mrep); |
| 1248 | break; |
| 1249 | } else if (rlen < len) { |
| 1250 | backup = len - rlen; |
| 1251 | uiop->uio_iov->iov_base -= backup; |
| 1252 | uiop->uio_iov->iov_len += backup; |
| 1253 | uiop->uio_offset -= backup; |
| 1254 | uiop->uio_resid += backup; |
| 1255 | len = rlen; |
| 1256 | } |
| 1257 | commit = fxdr_unsigned(int, *tl++); |
| 1258 | |
| 1259 | /* |
| 1260 | * Return the lowest committment level |
| 1261 | * obtained by any of the RPCs. |
| 1262 | */ |
| 1263 | if (committed == NFSV3WRITE_FILESYNC) |
| 1264 | committed = commit; |
| 1265 | else if (committed == NFSV3WRITE_DATASYNC && |
| 1266 | commit == NFSV3WRITE_UNSTABLE) |
| 1267 | committed = commit; |
| 1268 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ |
| 1269 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 1270 | NFSX_V3WRITEVERF); |
| 1271 | nmp->nm_state |= NFSSTA_HASWRITEVERF; |
| 1272 | } else if (bcmp((caddr_t)tl, |
| 1273 | (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { |
| 1274 | *must_commit = 1; |
| 1275 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 1276 | NFSX_V3WRITEVERF); |
| 1277 | } |
| 1278 | } |
| 1279 | } else |
| 1280 | nfsm_loadattr(vp, (struct vattr *)0); |
| 1281 | if (wccflag) |
| 1282 | VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec; |
| 1283 | m_freem(mrep); |
| 1284 | if (error) |
| 1285 | break; |
| 1286 | tsiz -= len; |
| 1287 | } |
| 1288 | nfsmout: |
| 1289 | if (vp->v_mount->mnt_flag & MNT_ASYNC) |
| 1290 | committed = NFSV3WRITE_FILESYNC; |
| 1291 | *iomode = committed; |
| 1292 | if (error) |
| 1293 | uiop->uio_resid = tsiz; |
| 1294 | return (error); |
| 1295 | } |
| 1296 | |
| 1297 | /* |
| 1298 | * nfs mknod rpc |
| 1299 | * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the |
| 1300 | * mode set to specify the file type and the size field for rdev. |
| 1301 | */ |
| 1302 | static int |
| 1303 | nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, |
| 1304 | struct vattr *vap) |
| 1305 | { |
| 1306 | struct nfsv2_sattr *sp; |
| 1307 | u_int32_t *tl; |
| 1308 | caddr_t cp; |
| 1309 | int32_t t1, t2; |
| 1310 | struct vnode *newvp = (struct vnode *)0; |
| 1311 | struct nfsnode *np = (struct nfsnode *)0; |
| 1312 | struct vattr vattr; |
| 1313 | char *cp2; |
| 1314 | caddr_t bpos, dpos; |
| 1315 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
| 1316 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1317 | u_int32_t rdev; |
| 1318 | int v3 = NFS_ISV3(dvp); |
| 1319 | |
| 1320 | if (vap->va_type == VCHR || vap->va_type == VBLK) |
| 1321 | rdev = txdr_unsigned(vap->va_rdev); |
| 1322 | else if (vap->va_type == VFIFO || vap->va_type == VSOCK) |
| 1323 | rdev = nfs_xdrneg1; |
| 1324 | else { |
| 1325 | return (EOPNOTSUPP); |
| 1326 | } |
| 1327 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1328 | return (error); |
| 1329 | } |
| 1330 | nfsstats.rpccnt[NFSPROC_MKNOD]++; |
| 1331 | nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + |
| 1332 | + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1333 | nfsm_fhtom(dvp, v3); |
| 1334 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1335 | if (v3) { |
| 1336 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1337 | *tl++ = vtonfsv3_type(vap->va_type); |
| 1338 | nfsm_v3attrbuild(vap, FALSE); |
| 1339 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
| 1340 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 1341 | *tl++ = txdr_unsigned(umajor(vap->va_rdev)); |
| 1342 | *tl = txdr_unsigned(uminor(vap->va_rdev)); |
| 1343 | } |
| 1344 | } else { |
| 1345 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1346 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1347 | sp->sa_uid = nfs_xdrneg1; |
| 1348 | sp->sa_gid = nfs_xdrneg1; |
| 1349 | sp->sa_size = rdev; |
| 1350 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1351 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1352 | } |
| 1353 | nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred); |
| 1354 | if (!error) { |
| 1355 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1356 | if (!gotvp) { |
| 1357 | if (newvp) { |
| 1358 | vput(newvp); |
| 1359 | newvp = (struct vnode *)0; |
| 1360 | } |
| 1361 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1362 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
| 1363 | if (!error) |
| 1364 | newvp = NFSTOV(np); |
| 1365 | } |
| 1366 | } |
| 1367 | if (v3) |
| 1368 | nfsm_wcc_data(dvp, wccflag); |
| 1369 | m_freem(mrep); |
| 1370 | nfsmout: |
| 1371 | if (error) { |
| 1372 | if (newvp) |
| 1373 | vput(newvp); |
| 1374 | } else { |
| 1375 | if (cnp->cn_flags & CNP_MAKEENTRY) |
| 1376 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1377 | *vpp = newvp; |
| 1378 | } |
| 1379 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1380 | if (!wccflag) |
| 1381 | VTONFS(dvp)->n_attrstamp = 0; |
| 1382 | return (error); |
| 1383 | } |
| 1384 | |
| 1385 | /* |
| 1386 | * nfs mknod vop |
| 1387 | * just call nfs_mknodrpc() to do the work. |
| 1388 | * |
| 1389 | * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1390 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1391 | */ |
| 1392 | /* ARGSUSED */ |
| 1393 | static int |
| 1394 | nfs_mknod(struct vop_mknod_args *ap) |
| 1395 | { |
| 1396 | return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); |
| 1397 | } |
| 1398 | |
| 1399 | static u_long create_verf; |
| 1400 | /* |
| 1401 | * nfs file create call |
| 1402 | * |
| 1403 | * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1404 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1405 | */ |
| 1406 | static int |
| 1407 | nfs_create(struct vop_create_args *ap) |
| 1408 | { |
| 1409 | struct vnode *dvp = ap->a_dvp; |
| 1410 | struct vattr *vap = ap->a_vap; |
| 1411 | struct componentname *cnp = ap->a_cnp; |
| 1412 | struct nfsv2_sattr *sp; |
| 1413 | u_int32_t *tl; |
| 1414 | caddr_t cp; |
| 1415 | int32_t t1, t2; |
| 1416 | struct nfsnode *np = (struct nfsnode *)0; |
| 1417 | struct vnode *newvp = (struct vnode *)0; |
| 1418 | caddr_t bpos, dpos, cp2; |
| 1419 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; |
| 1420 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1421 | struct vattr vattr; |
| 1422 | int v3 = NFS_ISV3(dvp); |
| 1423 | |
| 1424 | /* |
| 1425 | * Oops, not for me.. |
| 1426 | */ |
| 1427 | if (vap->va_type == VSOCK) |
| 1428 | return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); |
| 1429 | |
| 1430 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1431 | return (error); |
| 1432 | } |
| 1433 | if (vap->va_vaflags & VA_EXCLUSIVE) |
| 1434 | fmode |= O_EXCL; |
| 1435 | again: |
| 1436 | nfsstats.rpccnt[NFSPROC_CREATE]++; |
| 1437 | nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + |
| 1438 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); |
| 1439 | nfsm_fhtom(dvp, v3); |
| 1440 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1441 | if (v3) { |
| 1442 | nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); |
| 1443 | if (fmode & O_EXCL) { |
| 1444 | *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); |
| 1445 | nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); |
| 1446 | #ifdef INET |
| 1447 | if (!TAILQ_EMPTY(&in_ifaddrhead)) |
| 1448 | *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr; |
| 1449 | else |
| 1450 | #endif |
| 1451 | *tl++ = create_verf; |
| 1452 | *tl = ++create_verf; |
| 1453 | } else { |
| 1454 | *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); |
| 1455 | nfsm_v3attrbuild(vap, FALSE); |
| 1456 | } |
| 1457 | } else { |
| 1458 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1459 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
| 1460 | sp->sa_uid = nfs_xdrneg1; |
| 1461 | sp->sa_gid = nfs_xdrneg1; |
| 1462 | sp->sa_size = 0; |
| 1463 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1464 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1465 | } |
| 1466 | nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred); |
| 1467 | if (!error) { |
| 1468 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1469 | if (!gotvp) { |
| 1470 | if (newvp) { |
| 1471 | vput(newvp); |
| 1472 | newvp = (struct vnode *)0; |
| 1473 | } |
| 1474 | error = nfs_lookitup(dvp, cnp->cn_nameptr, |
| 1475 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
| 1476 | if (!error) |
| 1477 | newvp = NFSTOV(np); |
| 1478 | } |
| 1479 | } |
| 1480 | if (v3) |
| 1481 | nfsm_wcc_data(dvp, wccflag); |
| 1482 | m_freem(mrep); |
| 1483 | nfsmout: |
| 1484 | if (error) { |
| 1485 | if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { |
| 1486 | fmode &= ~O_EXCL; |
| 1487 | goto again; |
| 1488 | } |
| 1489 | if (newvp) |
| 1490 | vput(newvp); |
| 1491 | } else if (v3 && (fmode & O_EXCL)) { |
| 1492 | /* |
| 1493 | * We are normally called with only a partially initialized |
| 1494 | * VAP. Since the NFSv3 spec says that server may use the |
| 1495 | * file attributes to store the verifier, the spec requires |
| 1496 | * us to do a SETATTR RPC. FreeBSD servers store the verifier |
| 1497 | * in atime, but we can't really assume that all servers will |
| 1498 | * so we ensure that our SETATTR sets both atime and mtime. |
| 1499 | */ |
| 1500 | if (vap->va_mtime.tv_sec == VNOVAL) |
| 1501 | vfs_timestamp(&vap->va_mtime); |
| 1502 | if (vap->va_atime.tv_sec == VNOVAL) |
| 1503 | vap->va_atime = vap->va_mtime; |
| 1504 | error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); |
| 1505 | } |
| 1506 | if (!error) { |
| 1507 | if (cnp->cn_flags & CNP_MAKEENTRY) |
| 1508 | cache_enter(dvp, NCPNULL, newvp, cnp); |
| 1509 | /* |
| 1510 | * The new np may have enough info for access |
| 1511 | * checks, make sure rucred and wucred are |
| 1512 | * initialized for read and write rpc's. |
| 1513 | */ |
| 1514 | np = VTONFS(newvp); |
| 1515 | if (np->n_rucred == NULL) |
| 1516 | np->n_rucred = crhold(cnp->cn_cred); |
| 1517 | if (np->n_wucred == NULL) |
| 1518 | np->n_wucred = crhold(cnp->cn_cred); |
| 1519 | *ap->a_vpp = newvp; |
| 1520 | } |
| 1521 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1522 | if (!wccflag) |
| 1523 | VTONFS(dvp)->n_attrstamp = 0; |
| 1524 | return (error); |
| 1525 | } |
| 1526 | |
| 1527 | /* |
| 1528 | * nfs file remove call |
| 1529 | * To try and make nfs semantics closer to ufs semantics, a file that has |
| 1530 | * other processes using the vnode is renamed instead of removed and then |
| 1531 | * removed later on the last close. |
| 1532 | * - If v_usecount > 1 |
| 1533 | * If a rename is not already in the works |
| 1534 | * call nfs_sillyrename() to set it up |
| 1535 | * else |
| 1536 | * do the remove rpc |
| 1537 | * |
| 1538 | * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp, |
| 1539 | * struct vnode *a_vp, struct componentname *a_cnp) |
| 1540 | */ |
| 1541 | static int |
| 1542 | nfs_remove(struct vop_remove_args *ap) |
| 1543 | { |
| 1544 | struct vnode *vp = ap->a_vp; |
| 1545 | struct vnode *dvp = ap->a_dvp; |
| 1546 | struct componentname *cnp = ap->a_cnp; |
| 1547 | struct nfsnode *np = VTONFS(vp); |
| 1548 | int error = 0; |
| 1549 | struct vattr vattr; |
| 1550 | |
| 1551 | #ifndef DIAGNOSTIC |
| 1552 | if ((cnp->cn_flags & CNP_HASBUF) == 0) |
| 1553 | panic("nfs_remove: no name"); |
| 1554 | if (vp->v_usecount < 1) |
| 1555 | panic("nfs_remove: bad v_usecount"); |
| 1556 | #endif |
| 1557 | if (vp->v_type == VDIR) |
| 1558 | error = EPERM; |
| 1559 | else if (vp->v_usecount == 1 || (np->n_sillyrename && |
| 1560 | VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 && |
| 1561 | vattr.va_nlink > 1)) { |
| 1562 | /* |
| 1563 | * Purge the name cache so that the chance of a lookup for |
| 1564 | * the name succeeding while the remove is in progress is |
| 1565 | * minimized. Without node locking it can still happen, such |
| 1566 | * that an I/O op returns ESTALE, but since you get this if |
| 1567 | * another host removes the file.. |
| 1568 | */ |
| 1569 | cache_purge(vp); |
| 1570 | /* |
| 1571 | * throw away biocache buffers, mainly to avoid |
| 1572 | * unnecessary delayed writes later. |
| 1573 | */ |
| 1574 | error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1); |
| 1575 | /* Do the rpc */ |
| 1576 | if (error != EINTR) |
| 1577 | error = nfs_removerpc(dvp, cnp->cn_nameptr, |
| 1578 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); |
| 1579 | /* |
| 1580 | * Kludge City: If the first reply to the remove rpc is lost.. |
| 1581 | * the reply to the retransmitted request will be ENOENT |
| 1582 | * since the file was in fact removed |
| 1583 | * Therefore, we cheat and return success. |
| 1584 | */ |
| 1585 | if (error == ENOENT) |
| 1586 | error = 0; |
| 1587 | } else if (!np->n_sillyrename) |
| 1588 | error = nfs_sillyrename(dvp, vp, cnp); |
| 1589 | np->n_attrstamp = 0; |
| 1590 | return (error); |
| 1591 | } |
| 1592 | |
| 1593 | /* |
| 1594 | * nfs file remove rpc called from nfs_inactive |
| 1595 | */ |
| 1596 | int |
| 1597 | nfs_removeit(struct sillyrename *sp) |
| 1598 | { |
| 1599 | return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, |
| 1600 | sp->s_cred, NULL)); |
| 1601 | } |
| 1602 | |
| 1603 | /* |
| 1604 | * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). |
| 1605 | */ |
| 1606 | static int |
| 1607 | nfs_removerpc(struct vnode *dvp, const char *name, int namelen, |
| 1608 | struct ucred *cred, struct thread *td) |
| 1609 | { |
| 1610 | u_int32_t *tl; |
| 1611 | caddr_t cp; |
| 1612 | int32_t t1, t2; |
| 1613 | caddr_t bpos, dpos, cp2; |
| 1614 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 1615 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1616 | int v3 = NFS_ISV3(dvp); |
| 1617 | |
| 1618 | nfsstats.rpccnt[NFSPROC_REMOVE]++; |
| 1619 | nfsm_reqhead(dvp, NFSPROC_REMOVE, |
| 1620 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); |
| 1621 | nfsm_fhtom(dvp, v3); |
| 1622 | nfsm_strtom(name, namelen, NFS_MAXNAMLEN); |
| 1623 | nfsm_request(dvp, NFSPROC_REMOVE, td, cred); |
| 1624 | if (v3) |
| 1625 | nfsm_wcc_data(dvp, wccflag); |
| 1626 | m_freem(mrep); |
| 1627 | nfsmout: |
| 1628 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1629 | if (!wccflag) |
| 1630 | VTONFS(dvp)->n_attrstamp = 0; |
| 1631 | return (error); |
| 1632 | } |
| 1633 | |
| 1634 | /* |
| 1635 | * nfs file rename call |
| 1636 | * |
| 1637 | * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, |
| 1638 | * struct componentname *a_fcnp, struct vnode *a_tdvp, |
| 1639 | * struct vnode *a_tvp, struct componentname *a_tcnp) |
| 1640 | */ |
| 1641 | static int |
| 1642 | nfs_rename(struct vop_rename_args *ap) |
| 1643 | { |
| 1644 | struct vnode *fvp = ap->a_fvp; |
| 1645 | struct vnode *tvp = ap->a_tvp; |
| 1646 | struct vnode *fdvp = ap->a_fdvp; |
| 1647 | struct vnode *tdvp = ap->a_tdvp; |
| 1648 | struct componentname *tcnp = ap->a_tcnp; |
| 1649 | struct componentname *fcnp = ap->a_fcnp; |
| 1650 | int error; |
| 1651 | |
| 1652 | #ifndef DIAGNOSTIC |
| 1653 | if ((tcnp->cn_flags & CNP_HASBUF) == 0 || |
| 1654 | (fcnp->cn_flags & CNP_HASBUF) == 0) |
| 1655 | panic("nfs_rename: no name"); |
| 1656 | #endif |
| 1657 | /* Check for cross-device rename */ |
| 1658 | if ((fvp->v_mount != tdvp->v_mount) || |
| 1659 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
| 1660 | error = EXDEV; |
| 1661 | goto out; |
| 1662 | } |
| 1663 | |
| 1664 | /* |
| 1665 | * We have to flush B_DELWRI data prior to renaming |
| 1666 | * the file. If we don't, the delayed-write buffers |
| 1667 | * can be flushed out later after the file has gone stale |
| 1668 | * under NFSV3. NFSV2 does not have this problem because |
| 1669 | * ( as far as I can tell ) it flushes dirty buffers more |
| 1670 | * often. |
| 1671 | */ |
| 1672 | |
| 1673 | VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td); |
| 1674 | if (tvp) |
| 1675 | VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td); |
| 1676 | |
| 1677 | /* |
| 1678 | * If the tvp exists and is in use, sillyrename it before doing the |
| 1679 | * rename of the new file over it. |
| 1680 | * XXX Can't sillyrename a directory. |
| 1681 | */ |
| 1682 | if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && |
| 1683 | tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { |
| 1684 | vput(tvp); |
| 1685 | tvp = NULL; |
| 1686 | } |
| 1687 | |
| 1688 | error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, |
| 1689 | tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, |
| 1690 | tcnp->cn_td); |
| 1691 | |
| 1692 | if (fvp->v_type == VDIR) { |
| 1693 | if (tvp != NULL && tvp->v_type == VDIR) |
| 1694 | cache_purge(tdvp); |
| 1695 | cache_purge(fdvp); |
| 1696 | } |
| 1697 | |
| 1698 | out: |
| 1699 | if (tdvp == tvp) |
| 1700 | vrele(tdvp); |
| 1701 | else |
| 1702 | vput(tdvp); |
| 1703 | if (tvp) |
| 1704 | vput(tvp); |
| 1705 | vrele(fdvp); |
| 1706 | vrele(fvp); |
| 1707 | /* |
| 1708 | * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. |
| 1709 | */ |
| 1710 | if (error == ENOENT) |
| 1711 | error = 0; |
| 1712 | return (error); |
| 1713 | } |
| 1714 | |
| 1715 | /* |
| 1716 | * nfs file rename rpc called from nfs_remove() above |
| 1717 | */ |
| 1718 | static int |
| 1719 | nfs_renameit(struct vnode *sdvp, struct componentname *scnp, |
| 1720 | struct sillyrename *sp) |
| 1721 | { |
| 1722 | return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, |
| 1723 | sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); |
| 1724 | } |
| 1725 | |
| 1726 | /* |
| 1727 | * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). |
| 1728 | */ |
| 1729 | static int |
| 1730 | nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, |
| 1731 | struct vnode *tdvp, const char *tnameptr, int tnamelen, |
| 1732 | struct ucred *cred, struct thread *td) |
| 1733 | { |
| 1734 | u_int32_t *tl; |
| 1735 | caddr_t cp; |
| 1736 | int32_t t1, t2; |
| 1737 | caddr_t bpos, dpos, cp2; |
| 1738 | int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; |
| 1739 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1740 | int v3 = NFS_ISV3(fdvp); |
| 1741 | |
| 1742 | nfsstats.rpccnt[NFSPROC_RENAME]++; |
| 1743 | nfsm_reqhead(fdvp, NFSPROC_RENAME, |
| 1744 | (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + |
| 1745 | nfsm_rndup(tnamelen)); |
| 1746 | nfsm_fhtom(fdvp, v3); |
| 1747 | nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); |
| 1748 | nfsm_fhtom(tdvp, v3); |
| 1749 | nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); |
| 1750 | nfsm_request(fdvp, NFSPROC_RENAME, td, cred); |
| 1751 | if (v3) { |
| 1752 | nfsm_wcc_data(fdvp, fwccflag); |
| 1753 | nfsm_wcc_data(tdvp, twccflag); |
| 1754 | } |
| 1755 | m_freem(mrep); |
| 1756 | nfsmout: |
| 1757 | VTONFS(fdvp)->n_flag |= NMODIFIED; |
| 1758 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
| 1759 | if (!fwccflag) |
| 1760 | VTONFS(fdvp)->n_attrstamp = 0; |
| 1761 | if (!twccflag) |
| 1762 | VTONFS(tdvp)->n_attrstamp = 0; |
| 1763 | return (error); |
| 1764 | } |
| 1765 | |
| 1766 | /* |
| 1767 | * nfs hard link create call |
| 1768 | * |
| 1769 | * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, |
| 1770 | * struct componentname *a_cnp) |
| 1771 | */ |
| 1772 | static int |
| 1773 | nfs_link(struct vop_link_args *ap) |
| 1774 | { |
| 1775 | struct vnode *vp = ap->a_vp; |
| 1776 | struct vnode *tdvp = ap->a_tdvp; |
| 1777 | struct componentname *cnp = ap->a_cnp; |
| 1778 | u_int32_t *tl; |
| 1779 | caddr_t cp; |
| 1780 | int32_t t1, t2; |
| 1781 | caddr_t bpos, dpos, cp2; |
| 1782 | int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; |
| 1783 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1784 | int v3; |
| 1785 | |
| 1786 | if (vp->v_mount != tdvp->v_mount) { |
| 1787 | return (EXDEV); |
| 1788 | } |
| 1789 | |
| 1790 | /* |
| 1791 | * Push all writes to the server, so that the attribute cache |
| 1792 | * doesn't get "out of sync" with the server. |
| 1793 | * XXX There should be a better way! |
| 1794 | */ |
| 1795 | VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td); |
| 1796 | |
| 1797 | v3 = NFS_ISV3(vp); |
| 1798 | nfsstats.rpccnt[NFSPROC_LINK]++; |
| 1799 | nfsm_reqhead(vp, NFSPROC_LINK, |
| 1800 | NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
| 1801 | nfsm_fhtom(vp, v3); |
| 1802 | nfsm_fhtom(tdvp, v3); |
| 1803 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1804 | nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred); |
| 1805 | if (v3) { |
| 1806 | nfsm_postop_attr(vp, attrflag); |
| 1807 | nfsm_wcc_data(tdvp, wccflag); |
| 1808 | } |
| 1809 | m_freem(mrep); |
| 1810 | nfsmout: |
| 1811 | VTONFS(tdvp)->n_flag |= NMODIFIED; |
| 1812 | if (!attrflag) |
| 1813 | VTONFS(vp)->n_attrstamp = 0; |
| 1814 | if (!wccflag) |
| 1815 | VTONFS(tdvp)->n_attrstamp = 0; |
| 1816 | /* |
| 1817 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. |
| 1818 | */ |
| 1819 | if (error == EEXIST) |
| 1820 | error = 0; |
| 1821 | return (error); |
| 1822 | } |
| 1823 | |
| 1824 | /* |
| 1825 | * nfs symbolic link create call |
| 1826 | * |
| 1827 | * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1828 | * struct componentname *a_cnp, struct vattr *a_vap, |
| 1829 | * char *a_target) |
| 1830 | */ |
| 1831 | static int |
| 1832 | nfs_symlink(struct vop_symlink_args *ap) |
| 1833 | { |
| 1834 | struct vnode *dvp = ap->a_dvp; |
| 1835 | struct vattr *vap = ap->a_vap; |
| 1836 | struct componentname *cnp = ap->a_cnp; |
| 1837 | struct nfsv2_sattr *sp; |
| 1838 | u_int32_t *tl; |
| 1839 | caddr_t cp; |
| 1840 | int32_t t1, t2; |
| 1841 | caddr_t bpos, dpos, cp2; |
| 1842 | int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; |
| 1843 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1844 | struct vnode *newvp = (struct vnode *)0; |
| 1845 | int v3 = NFS_ISV3(dvp); |
| 1846 | |
| 1847 | nfsstats.rpccnt[NFSPROC_SYMLINK]++; |
| 1848 | slen = strlen(ap->a_target); |
| 1849 | nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + |
| 1850 | nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); |
| 1851 | nfsm_fhtom(dvp, v3); |
| 1852 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 1853 | if (v3) { |
| 1854 | nfsm_v3attrbuild(vap, FALSE); |
| 1855 | } |
| 1856 | nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); |
| 1857 | if (!v3) { |
| 1858 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1859 | sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); |
| 1860 | sp->sa_uid = nfs_xdrneg1; |
| 1861 | sp->sa_gid = nfs_xdrneg1; |
| 1862 | sp->sa_size = nfs_xdrneg1; |
| 1863 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1864 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1865 | } |
| 1866 | |
| 1867 | /* |
| 1868 | * Issue the NFS request and get the rpc response. |
| 1869 | * |
| 1870 | * Only NFSv3 responses returning an error of 0 actually return |
| 1871 | * a file handle that can be converted into newvp without having |
| 1872 | * to do an extra lookup rpc. |
| 1873 | */ |
| 1874 | nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred); |
| 1875 | if (v3) { |
| 1876 | if (error == 0) |
| 1877 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1878 | nfsm_wcc_data(dvp, wccflag); |
| 1879 | } |
| 1880 | |
| 1881 | /* |
| 1882 | * out code jumps -> here, mrep is also freed. |
| 1883 | */ |
| 1884 | |
| 1885 | m_freem(mrep); |
| 1886 | nfsmout: |
| 1887 | |
| 1888 | /* |
| 1889 | * If we get an EEXIST error, silently convert it to no-error |
| 1890 | * in case of an NFS retry. |
| 1891 | */ |
| 1892 | if (error == EEXIST) |
| 1893 | error = 0; |
| 1894 | |
| 1895 | /* |
| 1896 | * If we do not have (or no longer have) an error, and we could |
| 1897 | * not extract the newvp from the response due to the request being |
| 1898 | * NFSv2 or the error being EEXIST. We have to do a lookup in order |
| 1899 | * to obtain a newvp to return. |
| 1900 | */ |
| 1901 | if (error == 0 && newvp == NULL) { |
| 1902 | struct nfsnode *np = NULL; |
| 1903 | |
| 1904 | error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 1905 | cnp->cn_cred, cnp->cn_td, &np); |
| 1906 | if (!error) |
| 1907 | newvp = NFSTOV(np); |
| 1908 | } |
| 1909 | if (error) { |
| 1910 | if (newvp) |
| 1911 | vput(newvp); |
| 1912 | } else { |
| 1913 | *ap->a_vpp = newvp; |
| 1914 | } |
| 1915 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1916 | if (!wccflag) |
| 1917 | VTONFS(dvp)->n_attrstamp = 0; |
| 1918 | return (error); |
| 1919 | } |
| 1920 | |
| 1921 | /* |
| 1922 | * nfs make dir call |
| 1923 | * |
| 1924 | * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, |
| 1925 | * struct componentname *a_cnp, struct vattr *a_vap) |
| 1926 | */ |
| 1927 | static int |
| 1928 | nfs_mkdir(struct vop_mkdir_args *ap) |
| 1929 | { |
| 1930 | struct vnode *dvp = ap->a_dvp; |
| 1931 | struct vattr *vap = ap->a_vap; |
| 1932 | struct componentname *cnp = ap->a_cnp; |
| 1933 | struct nfsv2_sattr *sp; |
| 1934 | u_int32_t *tl; |
| 1935 | caddr_t cp; |
| 1936 | int32_t t1, t2; |
| 1937 | int len; |
| 1938 | struct nfsnode *np = (struct nfsnode *)0; |
| 1939 | struct vnode *newvp = (struct vnode *)0; |
| 1940 | caddr_t bpos, dpos, cp2; |
| 1941 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 1942 | int gotvp = 0; |
| 1943 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 1944 | struct vattr vattr; |
| 1945 | int v3 = NFS_ISV3(dvp); |
| 1946 | |
| 1947 | if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) { |
| 1948 | return (error); |
| 1949 | } |
| 1950 | len = cnp->cn_namelen; |
| 1951 | nfsstats.rpccnt[NFSPROC_MKDIR]++; |
| 1952 | nfsm_reqhead(dvp, NFSPROC_MKDIR, |
| 1953 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); |
| 1954 | nfsm_fhtom(dvp, v3); |
| 1955 | nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); |
| 1956 | if (v3) { |
| 1957 | nfsm_v3attrbuild(vap, FALSE); |
| 1958 | } else { |
| 1959 | nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); |
| 1960 | sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); |
| 1961 | sp->sa_uid = nfs_xdrneg1; |
| 1962 | sp->sa_gid = nfs_xdrneg1; |
| 1963 | sp->sa_size = nfs_xdrneg1; |
| 1964 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
| 1965 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); |
| 1966 | } |
| 1967 | nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred); |
| 1968 | if (!error) |
| 1969 | nfsm_mtofh(dvp, newvp, v3, gotvp); |
| 1970 | if (v3) |
| 1971 | nfsm_wcc_data(dvp, wccflag); |
| 1972 | m_freem(mrep); |
| 1973 | nfsmout: |
| 1974 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 1975 | if (!wccflag) |
| 1976 | VTONFS(dvp)->n_attrstamp = 0; |
| 1977 | /* |
| 1978 | * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry |
| 1979 | * if we can succeed in looking up the directory. |
| 1980 | */ |
| 1981 | if (error == EEXIST || (!error && !gotvp)) { |
| 1982 | if (newvp) { |
| 1983 | vrele(newvp); |
| 1984 | newvp = (struct vnode *)0; |
| 1985 | } |
| 1986 | error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, |
| 1987 | cnp->cn_td, &np); |
| 1988 | if (!error) { |
| 1989 | newvp = NFSTOV(np); |
| 1990 | if (newvp->v_type != VDIR) |
| 1991 | error = EEXIST; |
| 1992 | } |
| 1993 | } |
| 1994 | if (error) { |
| 1995 | if (newvp) |
| 1996 | vrele(newvp); |
| 1997 | } else |
| 1998 | *ap->a_vpp = newvp; |
| 1999 | return (error); |
| 2000 | } |
| 2001 | |
| 2002 | /* |
| 2003 | * nfs remove directory call |
| 2004 | * |
| 2005 | * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, |
| 2006 | * struct componentname *a_cnp) |
| 2007 | */ |
| 2008 | static int |
| 2009 | nfs_rmdir(struct vop_rmdir_args *ap) |
| 2010 | { |
| 2011 | struct vnode *vp = ap->a_vp; |
| 2012 | struct vnode *dvp = ap->a_dvp; |
| 2013 | struct componentname *cnp = ap->a_cnp; |
| 2014 | u_int32_t *tl; |
| 2015 | caddr_t cp; |
| 2016 | int32_t t1, t2; |
| 2017 | caddr_t bpos, dpos, cp2; |
| 2018 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2019 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2020 | int v3 = NFS_ISV3(dvp); |
| 2021 | |
| 2022 | if (dvp == vp) |
| 2023 | return (EINVAL); |
| 2024 | nfsstats.rpccnt[NFSPROC_RMDIR]++; |
| 2025 | nfsm_reqhead(dvp, NFSPROC_RMDIR, |
| 2026 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); |
| 2027 | nfsm_fhtom(dvp, v3); |
| 2028 | nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); |
| 2029 | nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred); |
| 2030 | if (v3) |
| 2031 | nfsm_wcc_data(dvp, wccflag); |
| 2032 | m_freem(mrep); |
| 2033 | nfsmout: |
| 2034 | VTONFS(dvp)->n_flag |= NMODIFIED; |
| 2035 | if (!wccflag) |
| 2036 | VTONFS(dvp)->n_attrstamp = 0; |
| 2037 | cache_purge(dvp); |
| 2038 | cache_purge(vp); |
| 2039 | /* |
| 2040 | * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. |
| 2041 | */ |
| 2042 | if (error == ENOENT) |
| 2043 | error = 0; |
| 2044 | return (error); |
| 2045 | } |
| 2046 | |
| 2047 | /* |
| 2048 | * nfs readdir call |
| 2049 | * |
| 2050 | * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) |
| 2051 | */ |
| 2052 | static int |
| 2053 | nfs_readdir(struct vop_readdir_args *ap) |
| 2054 | { |
| 2055 | struct vnode *vp = ap->a_vp; |
| 2056 | struct nfsnode *np = VTONFS(vp); |
| 2057 | struct uio *uio = ap->a_uio; |
| 2058 | int tresid, error; |
| 2059 | struct vattr vattr; |
| 2060 | |
| 2061 | if (vp->v_type != VDIR) |
| 2062 | return (EPERM); |
| 2063 | /* |
| 2064 | * First, check for hit on the EOF offset cache |
| 2065 | */ |
| 2066 | if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && |
| 2067 | (np->n_flag & NMODIFIED) == 0) { |
| 2068 | if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { |
| 2069 | if (NQNFS_CKCACHABLE(vp, ND_READ)) { |
| 2070 | nfsstats.direofcache_hits++; |
| 2071 | return (0); |
| 2072 | } |
| 2073 | } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 && |
| 2074 | np->n_mtime == vattr.va_mtime.tv_sec) { |
| 2075 | nfsstats.direofcache_hits++; |
| 2076 | return (0); |
| 2077 | } |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * Call nfs_bioread() to do the real work. |
| 2082 | */ |
| 2083 | tresid = uio->uio_resid; |
| 2084 | error = nfs_bioread(vp, uio, 0); |
| 2085 | |
| 2086 | if (!error && uio->uio_resid == tresid) |
| 2087 | nfsstats.direofcache_misses++; |
| 2088 | return (error); |
| 2089 | } |
| 2090 | |
| 2091 | /* |
| 2092 | * Readdir rpc call. |
| 2093 | * Called from below the buffer cache by nfs_doio(). |
| 2094 | */ |
| 2095 | int |
| 2096 | nfs_readdirrpc(struct vnode *vp, struct uio *uiop) |
| 2097 | { |
| 2098 | int len, left; |
| 2099 | struct dirent *dp = NULL; |
| 2100 | u_int32_t *tl; |
| 2101 | caddr_t cp; |
| 2102 | int32_t t1, t2; |
| 2103 | nfsuint64 *cookiep; |
| 2104 | caddr_t bpos, dpos, cp2; |
| 2105 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2106 | nfsuint64 cookie; |
| 2107 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2108 | struct nfsnode *dnp = VTONFS(vp); |
| 2109 | u_quad_t fileno; |
| 2110 | int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; |
| 2111 | int attrflag; |
| 2112 | int v3 = NFS_ISV3(vp); |
| 2113 | |
| 2114 | #ifndef DIAGNOSTIC |
| 2115 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || |
| 2116 | (uiop->uio_resid & (DIRBLKSIZ - 1))) |
| 2117 | panic("nfs readdirrpc bad uio"); |
| 2118 | #endif |
| 2119 | |
| 2120 | /* |
| 2121 | * If there is no cookie, assume directory was stale. |
| 2122 | */ |
| 2123 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); |
| 2124 | if (cookiep) |
| 2125 | cookie = *cookiep; |
| 2126 | else |
| 2127 | return (NFSERR_BAD_COOKIE); |
| 2128 | /* |
| 2129 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2130 | * truncated to a multiple of DIRBLKSIZ. |
| 2131 | * The stopping criteria is EOF or buffer full. |
| 2132 | */ |
| 2133 | while (more_dirs && bigenough) { |
| 2134 | nfsstats.rpccnt[NFSPROC_READDIR]++; |
| 2135 | nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + |
| 2136 | NFSX_READDIR(v3)); |
| 2137 | nfsm_fhtom(vp, v3); |
| 2138 | if (v3) { |
| 2139 | nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); |
| 2140 | *tl++ = cookie.nfsuquad[0]; |
| 2141 | *tl++ = cookie.nfsuquad[1]; |
| 2142 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2143 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2144 | } else { |
| 2145 | nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); |
| 2146 | *tl++ = cookie.nfsuquad[0]; |
| 2147 | } |
| 2148 | *tl = txdr_unsigned(nmp->nm_readdirsize); |
| 2149 | nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 2150 | if (v3) { |
| 2151 | nfsm_postop_attr(vp, attrflag); |
| 2152 | if (!error) { |
| 2153 | nfsm_dissect(tl, u_int32_t *, |
| 2154 | 2 * NFSX_UNSIGNED); |
| 2155 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2156 | dnp->n_cookieverf.nfsuquad[1] = *tl; |
| 2157 | } else { |
| 2158 | m_freem(mrep); |
| 2159 | goto nfsmout; |
| 2160 | } |
| 2161 | } |
| 2162 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2163 | more_dirs = fxdr_unsigned(int, *tl); |
| 2164 | |
| 2165 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2166 | while (more_dirs && bigenough) { |
| 2167 | if (v3) { |
| 2168 | nfsm_dissect(tl, u_int32_t *, |
| 2169 | 3 * NFSX_UNSIGNED); |
| 2170 | fileno = fxdr_hyper(tl); |
| 2171 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2172 | } else { |
| 2173 | nfsm_dissect(tl, u_int32_t *, |
| 2174 | 2 * NFSX_UNSIGNED); |
| 2175 | fileno = fxdr_unsigned(u_quad_t, *tl++); |
| 2176 | len = fxdr_unsigned(int, *tl); |
| 2177 | } |
| 2178 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2179 | error = EBADRPC; |
| 2180 | m_freem(mrep); |
| 2181 | goto nfsmout; |
| 2182 | } |
| 2183 | tlen = nfsm_rndup(len); |
| 2184 | if (tlen == len) |
| 2185 | tlen += 4; /* To ensure null termination */ |
| 2186 | left = DIRBLKSIZ - blksiz; |
| 2187 | if ((tlen + DIRHDSIZ) > left) { |
| 2188 | dp->d_reclen += left; |
| 2189 | uiop->uio_iov->iov_base += left; |
| 2190 | uiop->uio_iov->iov_len -= left; |
| 2191 | uiop->uio_offset += left; |
| 2192 | uiop->uio_resid -= left; |
| 2193 | blksiz = 0; |
| 2194 | } |
| 2195 | if ((tlen + DIRHDSIZ) > uiop->uio_resid) |
| 2196 | bigenough = 0; |
| 2197 | if (bigenough) { |
| 2198 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2199 | dp->d_fileno = (int)fileno; |
| 2200 | dp->d_namlen = len; |
| 2201 | dp->d_reclen = tlen + DIRHDSIZ; |
| 2202 | dp->d_type = DT_UNKNOWN; |
| 2203 | blksiz += dp->d_reclen; |
| 2204 | if (blksiz == DIRBLKSIZ) |
| 2205 | blksiz = 0; |
| 2206 | uiop->uio_offset += DIRHDSIZ; |
| 2207 | uiop->uio_resid -= DIRHDSIZ; |
| 2208 | uiop->uio_iov->iov_base += DIRHDSIZ; |
| 2209 | uiop->uio_iov->iov_len -= DIRHDSIZ; |
| 2210 | nfsm_mtouio(uiop, len); |
| 2211 | cp = uiop->uio_iov->iov_base; |
| 2212 | tlen -= len; |
| 2213 | *cp = '\0'; /* null terminate */ |
| 2214 | uiop->uio_iov->iov_base += tlen; |
| 2215 | uiop->uio_iov->iov_len -= tlen; |
| 2216 | uiop->uio_offset += tlen; |
| 2217 | uiop->uio_resid -= tlen; |
| 2218 | } else |
| 2219 | nfsm_adv(nfsm_rndup(len)); |
| 2220 | if (v3) { |
| 2221 | nfsm_dissect(tl, u_int32_t *, |
| 2222 | 3 * NFSX_UNSIGNED); |
| 2223 | } else { |
| 2224 | nfsm_dissect(tl, u_int32_t *, |
| 2225 | 2 * NFSX_UNSIGNED); |
| 2226 | } |
| 2227 | if (bigenough) { |
| 2228 | cookie.nfsuquad[0] = *tl++; |
| 2229 | if (v3) |
| 2230 | cookie.nfsuquad[1] = *tl++; |
| 2231 | } else if (v3) |
| 2232 | tl += 2; |
| 2233 | else |
| 2234 | tl++; |
| 2235 | more_dirs = fxdr_unsigned(int, *tl); |
| 2236 | } |
| 2237 | /* |
| 2238 | * If at end of rpc data, get the eof boolean |
| 2239 | */ |
| 2240 | if (!more_dirs) { |
| 2241 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2242 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2243 | } |
| 2244 | m_freem(mrep); |
| 2245 | } |
| 2246 | /* |
| 2247 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ |
| 2248 | * by increasing d_reclen for the last record. |
| 2249 | */ |
| 2250 | if (blksiz > 0) { |
| 2251 | left = DIRBLKSIZ - blksiz; |
| 2252 | dp->d_reclen += left; |
| 2253 | uiop->uio_iov->iov_base += left; |
| 2254 | uiop->uio_iov->iov_len -= left; |
| 2255 | uiop->uio_offset += left; |
| 2256 | uiop->uio_resid -= left; |
| 2257 | } |
| 2258 | |
| 2259 | /* |
| 2260 | * We are now either at the end of the directory or have filled the |
| 2261 | * block. |
| 2262 | */ |
| 2263 | if (bigenough) |
| 2264 | dnp->n_direofoffset = uiop->uio_offset; |
| 2265 | else { |
| 2266 | if (uiop->uio_resid > 0) |
| 2267 | printf("EEK! readdirrpc resid > 0\n"); |
| 2268 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
| 2269 | *cookiep = cookie; |
| 2270 | } |
| 2271 | nfsmout: |
| 2272 | return (error); |
| 2273 | } |
| 2274 | |
| 2275 | /* |
| 2276 | * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). |
| 2277 | */ |
| 2278 | int |
| 2279 | nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop) |
| 2280 | { |
| 2281 | int len, left; |
| 2282 | struct dirent *dp; |
| 2283 | u_int32_t *tl; |
| 2284 | caddr_t cp; |
| 2285 | int32_t t1, t2; |
| 2286 | struct vnode *newvp; |
| 2287 | nfsuint64 *cookiep; |
| 2288 | caddr_t bpos, dpos, cp2, dpossav1, dpossav2; |
| 2289 | struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; |
| 2290 | struct nameidata nami, *ndp = &nami; |
| 2291 | struct componentname *cnp = &ndp->ni_cnd; |
| 2292 | nfsuint64 cookie; |
| 2293 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2294 | struct nfsnode *dnp = VTONFS(vp), *np; |
| 2295 | nfsfh_t *fhp; |
| 2296 | u_quad_t fileno; |
| 2297 | int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; |
| 2298 | int attrflag, fhsize; |
| 2299 | |
| 2300 | #ifndef nolint |
| 2301 | dp = (struct dirent *)0; |
| 2302 | #endif |
| 2303 | #ifndef DIAGNOSTIC |
| 2304 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || |
| 2305 | (uiop->uio_resid & (DIRBLKSIZ - 1))) |
| 2306 | panic("nfs readdirplusrpc bad uio"); |
| 2307 | #endif |
| 2308 | ndp->ni_dvp = vp; |
| 2309 | newvp = NULLVP; |
| 2310 | |
| 2311 | /* |
| 2312 | * If there is no cookie, assume directory was stale. |
| 2313 | */ |
| 2314 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); |
| 2315 | if (cookiep) |
| 2316 | cookie = *cookiep; |
| 2317 | else |
| 2318 | return (NFSERR_BAD_COOKIE); |
| 2319 | /* |
| 2320 | * Loop around doing readdir rpc's of size nm_readdirsize |
| 2321 | * truncated to a multiple of DIRBLKSIZ. |
| 2322 | * The stopping criteria is EOF or buffer full. |
| 2323 | */ |
| 2324 | while (more_dirs && bigenough) { |
| 2325 | nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; |
| 2326 | nfsm_reqhead(vp, NFSPROC_READDIRPLUS, |
| 2327 | NFSX_FH(1) + 6 * NFSX_UNSIGNED); |
| 2328 | nfsm_fhtom(vp, 1); |
| 2329 | nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); |
| 2330 | *tl++ = cookie.nfsuquad[0]; |
| 2331 | *tl++ = cookie.nfsuquad[1]; |
| 2332 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; |
| 2333 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; |
| 2334 | *tl++ = txdr_unsigned(nmp->nm_readdirsize); |
| 2335 | *tl = txdr_unsigned(nmp->nm_rsize); |
| 2336 | nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ)); |
| 2337 | nfsm_postop_attr(vp, attrflag); |
| 2338 | if (error) { |
| 2339 | m_freem(mrep); |
| 2340 | goto nfsmout; |
| 2341 | } |
| 2342 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2343 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
| 2344 | dnp->n_cookieverf.nfsuquad[1] = *tl++; |
| 2345 | more_dirs = fxdr_unsigned(int, *tl); |
| 2346 | |
| 2347 | /* loop thru the dir entries, doctoring them to 4bsd form */ |
| 2348 | while (more_dirs && bigenough) { |
| 2349 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2350 | fileno = fxdr_hyper(tl); |
| 2351 | len = fxdr_unsigned(int, *(tl + 2)); |
| 2352 | if (len <= 0 || len > NFS_MAXNAMLEN) { |
| 2353 | error = EBADRPC; |
| 2354 | m_freem(mrep); |
| 2355 | goto nfsmout; |
| 2356 | } |
| 2357 | tlen = nfsm_rndup(len); |
| 2358 | if (tlen == len) |
| 2359 | tlen += 4; /* To ensure null termination*/ |
| 2360 | left = DIRBLKSIZ - blksiz; |
| 2361 | if ((tlen + DIRHDSIZ) > left) { |
| 2362 | dp->d_reclen += left; |
| 2363 | uiop->uio_iov->iov_base += left; |
| 2364 | uiop->uio_iov->iov_len -= left; |
| 2365 | uiop->uio_offset += left; |
| 2366 | uiop->uio_resid -= left; |
| 2367 | blksiz = 0; |
| 2368 | } |
| 2369 | if ((tlen + DIRHDSIZ) > uiop->uio_resid) |
| 2370 | bigenough = 0; |
| 2371 | if (bigenough) { |
| 2372 | dp = (struct dirent *)uiop->uio_iov->iov_base; |
| 2373 | dp->d_fileno = (int)fileno; |
| 2374 | dp->d_namlen = len; |
| 2375 | dp->d_reclen = tlen + DIRHDSIZ; |
| 2376 | dp->d_type = DT_UNKNOWN; |
| 2377 | blksiz += dp->d_reclen; |
| 2378 | if (blksiz == DIRBLKSIZ) |
| 2379 | blksiz = 0; |
| 2380 | uiop->uio_offset += DIRHDSIZ; |
| 2381 | uiop->uio_resid -= DIRHDSIZ; |
| 2382 | uiop->uio_iov->iov_base += DIRHDSIZ; |
| 2383 | uiop->uio_iov->iov_len -= DIRHDSIZ; |
| 2384 | cnp->cn_nameptr = uiop->uio_iov->iov_base; |
| 2385 | cnp->cn_namelen = len; |
| 2386 | nfsm_mtouio(uiop, len); |
| 2387 | cp = uiop->uio_iov->iov_base; |
| 2388 | tlen -= len; |
| 2389 | *cp = '\0'; |
| 2390 | uiop->uio_iov->iov_base += tlen; |
| 2391 | uiop->uio_iov->iov_len -= tlen; |
| 2392 | uiop->uio_offset += tlen; |
| 2393 | uiop->uio_resid -= tlen; |
| 2394 | } else |
| 2395 | nfsm_adv(nfsm_rndup(len)); |
| 2396 | nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2397 | if (bigenough) { |
| 2398 | cookie.nfsuquad[0] = *tl++; |
| 2399 | cookie.nfsuquad[1] = *tl++; |
| 2400 | } else |
| 2401 | tl += 2; |
| 2402 | |
| 2403 | /* |
| 2404 | * Since the attributes are before the file handle |
| 2405 | * (sigh), we must skip over the attributes and then |
| 2406 | * come back and get them. |
| 2407 | */ |
| 2408 | attrflag = fxdr_unsigned(int, *tl); |
| 2409 | if (attrflag) { |
| 2410 | dpossav1 = dpos; |
| 2411 | mdsav1 = md; |
| 2412 | nfsm_adv(NFSX_V3FATTR); |
| 2413 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2414 | doit = fxdr_unsigned(int, *tl); |
| 2415 | if (doit) { |
| 2416 | nfsm_getfh(fhp, fhsize, 1); |
| 2417 | if (NFS_CMPFH(dnp, fhp, fhsize)) { |
| 2418 | vref(vp); |
| 2419 | newvp = vp; |
| 2420 | np = dnp; |
| 2421 | } else { |
| 2422 | error = nfs_nget(vp->v_mount, fhp, |
| 2423 | fhsize, &np); |
| 2424 | if (error) |
| 2425 | doit = 0; |
| 2426 | else |
| 2427 | newvp = NFSTOV(np); |
| 2428 | } |
| 2429 | } |
| 2430 | if (doit && bigenough) { |
| 2431 | dpossav2 = dpos; |
| 2432 | dpos = dpossav1; |
| 2433 | mdsav2 = md; |
| 2434 | md = mdsav1; |
| 2435 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 2436 | dpos = dpossav2; |
| 2437 | md = mdsav2; |
| 2438 | dp->d_type = |
| 2439 | IFTODT(VTTOIF(np->n_vattr.va_type)); |
| 2440 | ndp->ni_vp = newvp; |
| 2441 | cache_enter(ndp->ni_dvp, NCPNULL, ndp->ni_vp, cnp); |
| 2442 | } |
| 2443 | } else { |
| 2444 | /* Just skip over the file handle */ |
| 2445 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2446 | i = fxdr_unsigned(int, *tl); |
| 2447 | nfsm_adv(nfsm_rndup(i)); |
| 2448 | } |
| 2449 | if (newvp != NULLVP) { |
| 2450 | if (newvp == vp) |
| 2451 | vrele(newvp); |
| 2452 | else |
| 2453 | vput(newvp); |
| 2454 | newvp = NULLVP; |
| 2455 | } |
| 2456 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2457 | more_dirs = fxdr_unsigned(int, *tl); |
| 2458 | } |
| 2459 | /* |
| 2460 | * If at end of rpc data, get the eof boolean |
| 2461 | */ |
| 2462 | if (!more_dirs) { |
| 2463 | nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); |
| 2464 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
| 2465 | } |
| 2466 | m_freem(mrep); |
| 2467 | } |
| 2468 | /* |
| 2469 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ |
| 2470 | * by increasing d_reclen for the last record. |
| 2471 | */ |
| 2472 | if (blksiz > 0) { |
| 2473 | left = DIRBLKSIZ - blksiz; |
| 2474 | dp->d_reclen += left; |
| 2475 | uiop->uio_iov->iov_base += left; |
| 2476 | uiop->uio_iov->iov_len -= left; |
| 2477 | uiop->uio_offset += left; |
| 2478 | uiop->uio_resid -= left; |
| 2479 | } |
| 2480 | |
| 2481 | /* |
| 2482 | * We are now either at the end of the directory or have filled the |
| 2483 | * block. |
| 2484 | */ |
| 2485 | if (bigenough) |
| 2486 | dnp->n_direofoffset = uiop->uio_offset; |
| 2487 | else { |
| 2488 | if (uiop->uio_resid > 0) |
| 2489 | printf("EEK! readdirplusrpc resid > 0\n"); |
| 2490 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
| 2491 | *cookiep = cookie; |
| 2492 | } |
| 2493 | nfsmout: |
| 2494 | if (newvp != NULLVP) { |
| 2495 | if (newvp == vp) |
| 2496 | vrele(newvp); |
| 2497 | else |
| 2498 | vput(newvp); |
| 2499 | newvp = NULLVP; |
| 2500 | } |
| 2501 | return (error); |
| 2502 | } |
| 2503 | |
| 2504 | /* |
| 2505 | * Silly rename. To make the NFS filesystem that is stateless look a little |
| 2506 | * more like the "ufs" a remove of an active vnode is translated to a rename |
| 2507 | * to a funny looking filename that is removed by nfs_inactive on the |
| 2508 | * nfsnode. There is the potential for another process on a different client |
| 2509 | * to create the same funny name between the nfs_lookitup() fails and the |
| 2510 | * nfs_rename() completes, but... |
| 2511 | */ |
| 2512 | static int |
| 2513 | nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) |
| 2514 | { |
| 2515 | struct sillyrename *sp; |
| 2516 | struct nfsnode *np; |
| 2517 | int error; |
| 2518 | |
| 2519 | cache_purge(dvp); |
| 2520 | np = VTONFS(vp); |
| 2521 | #ifndef DIAGNOSTIC |
| 2522 | if (vp->v_type == VDIR) |
| 2523 | panic("nfs: sillyrename dir"); |
| 2524 | #endif |
| 2525 | MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), |
| 2526 | M_NFSREQ, M_WAITOK); |
| 2527 | sp->s_cred = crdup(cnp->cn_cred); |
| 2528 | sp->s_dvp = dvp; |
| 2529 | vref(dvp); |
| 2530 | |
| 2531 | /* Fudge together a funny name */ |
| 2532 | sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td); |
| 2533 | |
| 2534 | /* Try lookitups until we get one that isn't there */ |
| 2535 | while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2536 | cnp->cn_td, (struct nfsnode **)0) == 0) { |
| 2537 | sp->s_name[4]++; |
| 2538 | if (sp->s_name[4] > 'z') { |
| 2539 | error = EINVAL; |
| 2540 | goto bad; |
| 2541 | } |
| 2542 | } |
| 2543 | error = nfs_renameit(dvp, cnp, sp); |
| 2544 | if (error) |
| 2545 | goto bad; |
| 2546 | error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, |
| 2547 | cnp->cn_td, &np); |
| 2548 | np->n_sillyrename = sp; |
| 2549 | return (0); |
| 2550 | bad: |
| 2551 | vrele(sp->s_dvp); |
| 2552 | crfree(sp->s_cred); |
| 2553 | free((caddr_t)sp, M_NFSREQ); |
| 2554 | return (error); |
| 2555 | } |
| 2556 | |
| 2557 | /* |
| 2558 | * Look up a file name and optionally either update the file handle or |
| 2559 | * allocate an nfsnode, depending on the value of npp. |
| 2560 | * npp == NULL --> just do the lookup |
| 2561 | * *npp == NULL --> allocate a new nfsnode and make sure attributes are |
| 2562 | * handled too |
| 2563 | * *npp != NULL --> update the file handle in the vnode |
| 2564 | */ |
| 2565 | static int |
| 2566 | nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, |
| 2567 | struct thread *td, struct nfsnode **npp) |
| 2568 | { |
| 2569 | u_int32_t *tl; |
| 2570 | caddr_t cp; |
| 2571 | int32_t t1, t2; |
| 2572 | struct vnode *newvp = (struct vnode *)0; |
| 2573 | struct nfsnode *np, *dnp = VTONFS(dvp); |
| 2574 | caddr_t bpos, dpos, cp2; |
| 2575 | int error = 0, fhlen, attrflag; |
| 2576 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2577 | nfsfh_t *nfhp; |
| 2578 | int v3 = NFS_ISV3(dvp); |
| 2579 | |
| 2580 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; |
| 2581 | nfsm_reqhead(dvp, NFSPROC_LOOKUP, |
| 2582 | NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); |
| 2583 | nfsm_fhtom(dvp, v3); |
| 2584 | nfsm_strtom(name, len, NFS_MAXNAMLEN); |
| 2585 | nfsm_request(dvp, NFSPROC_LOOKUP, td, cred); |
| 2586 | if (npp && !error) { |
| 2587 | nfsm_getfh(nfhp, fhlen, v3); |
| 2588 | if (*npp) { |
| 2589 | np = *npp; |
| 2590 | if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { |
| 2591 | free((caddr_t)np->n_fhp, M_NFSBIGFH); |
| 2592 | np->n_fhp = &np->n_fh; |
| 2593 | } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) |
| 2594 | np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); |
| 2595 | bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); |
| 2596 | np->n_fhsize = fhlen; |
| 2597 | newvp = NFSTOV(np); |
| 2598 | } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { |
| 2599 | vref(dvp); |
| 2600 | newvp = dvp; |
| 2601 | } else { |
| 2602 | error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); |
| 2603 | if (error) { |
| 2604 | m_freem(mrep); |
| 2605 | return (error); |
| 2606 | } |
| 2607 | newvp = NFSTOV(np); |
| 2608 | } |
| 2609 | if (v3) { |
| 2610 | nfsm_postop_attr(newvp, attrflag); |
| 2611 | if (!attrflag && *npp == NULL) { |
| 2612 | m_freem(mrep); |
| 2613 | if (newvp == dvp) |
| 2614 | vrele(newvp); |
| 2615 | else |
| 2616 | vput(newvp); |
| 2617 | return (ENOENT); |
| 2618 | } |
| 2619 | } else |
| 2620 | nfsm_loadattr(newvp, (struct vattr *)0); |
| 2621 | } |
| 2622 | m_freem(mrep); |
| 2623 | nfsmout: |
| 2624 | if (npp && *npp == NULL) { |
| 2625 | if (error) { |
| 2626 | if (newvp) { |
| 2627 | if (newvp == dvp) |
| 2628 | vrele(newvp); |
| 2629 | else |
| 2630 | vput(newvp); |
| 2631 | } |
| 2632 | } else |
| 2633 | *npp = np; |
| 2634 | } |
| 2635 | return (error); |
| 2636 | } |
| 2637 | |
| 2638 | /* |
| 2639 | * Nfs Version 3 commit rpc |
| 2640 | */ |
| 2641 | int |
| 2642 | nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) |
| 2643 | { |
| 2644 | caddr_t cp; |
| 2645 | u_int32_t *tl; |
| 2646 | int32_t t1, t2; |
| 2647 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2648 | caddr_t bpos, dpos, cp2; |
| 2649 | int error = 0, wccflag = NFSV3_WCCRATTR; |
| 2650 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 2651 | |
| 2652 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) |
| 2653 | return (0); |
| 2654 | nfsstats.rpccnt[NFSPROC_COMMIT]++; |
| 2655 | nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); |
| 2656 | nfsm_fhtom(vp, 1); |
| 2657 | nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); |
| 2658 | txdr_hyper(offset, tl); |
| 2659 | tl += 2; |
| 2660 | *tl = txdr_unsigned(cnt); |
| 2661 | nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE)); |
| 2662 | nfsm_wcc_data(vp, wccflag); |
| 2663 | if (!error) { |
| 2664 | nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); |
| 2665 | if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, |
| 2666 | NFSX_V3WRITEVERF)) { |
| 2667 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, |
| 2668 | NFSX_V3WRITEVERF); |
| 2669 | error = NFSERR_STALEWRITEVERF; |
| 2670 | } |
| 2671 | } |
| 2672 | m_freem(mrep); |
| 2673 | nfsmout: |
| 2674 | return (error); |
| 2675 | } |
| 2676 | |
| 2677 | /* |
| 2678 | * Kludge City.. |
| 2679 | * - make nfs_bmap() essentially a no-op that does no translation |
| 2680 | * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc |
| 2681 | * (Maybe I could use the process's page mapping, but I was concerned that |
| 2682 | * Kernel Write might not be enabled and also figured copyout() would do |
| 2683 | * a lot more work than bcopy() and also it currently happens in the |
| 2684 | * context of the swapper process (2). |
| 2685 | * |
| 2686 | * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp, |
| 2687 | * daddr_t *a_bnp, int *a_runp, int *a_runb) |
| 2688 | */ |
| 2689 | static int |
| 2690 | nfs_bmap(struct vop_bmap_args *ap) |
| 2691 | { |
| 2692 | struct vnode *vp = ap->a_vp; |
| 2693 | |
| 2694 | if (ap->a_vpp != NULL) |
| 2695 | *ap->a_vpp = vp; |
| 2696 | if (ap->a_bnp != NULL) |
| 2697 | *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); |
| 2698 | if (ap->a_runp != NULL) |
| 2699 | *ap->a_runp = 0; |
| 2700 | if (ap->a_runb != NULL) |
| 2701 | *ap->a_runb = 0; |
| 2702 | return (0); |
| 2703 | } |
| 2704 | |
| 2705 | /* |
| 2706 | * Strategy routine. |
| 2707 | * For async requests when nfsiod(s) are running, queue the request by |
| 2708 | * calling nfs_asyncio(), otherwise just all nfs_doio() to do the |
| 2709 | * request. |
| 2710 | */ |
| 2711 | static int |
| 2712 | nfs_strategy(struct vop_strategy_args *ap) |
| 2713 | { |
| 2714 | struct buf *bp = ap->a_bp; |
| 2715 | struct thread *td; |
| 2716 | int error = 0; |
| 2717 | |
| 2718 | KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); |
| 2719 | KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp)); |
| 2720 | |
| 2721 | if (bp->b_flags & B_PHYS) |
| 2722 | panic("nfs physio"); |
| 2723 | |
| 2724 | if (bp->b_flags & B_ASYNC) |
| 2725 | td = NULL; |
| 2726 | else |
| 2727 | td = curthread; /* XXX */ |
| 2728 | |
| 2729 | /* |
| 2730 | * If the op is asynchronous and an i/o daemon is waiting |
| 2731 | * queue the request, wake it up and wait for completion |
| 2732 | * otherwise just do it ourselves. |
| 2733 | */ |
| 2734 | if ((bp->b_flags & B_ASYNC) == 0 || |
| 2735 | nfs_asyncio(bp, td)) |
| 2736 | error = nfs_doio(bp, td); |
| 2737 | return (error); |
| 2738 | } |
| 2739 | |
| 2740 | /* |
| 2741 | * Mmap a file |
| 2742 | * |
| 2743 | * NB Currently unsupported. |
| 2744 | * |
| 2745 | * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred, |
| 2746 | * struct thread *a_td) |
| 2747 | */ |
| 2748 | /* ARGSUSED */ |
| 2749 | static int |
| 2750 | nfs_mmap(struct vop_mmap_args *ap) |
| 2751 | { |
| 2752 | return (EINVAL); |
| 2753 | } |
| 2754 | |
| 2755 | /* |
| 2756 | * fsync vnode op. Just call nfs_flush() with commit == 1. |
| 2757 | * |
| 2758 | * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp, |
| 2759 | * struct ucred * a_cred, int a_waitfor, struct thread *a_td) |
| 2760 | */ |
| 2761 | /* ARGSUSED */ |
| 2762 | static int |
| 2763 | nfs_fsync(struct vop_fsync_args *ap) |
| 2764 | { |
| 2765 | return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1)); |
| 2766 | } |
| 2767 | |
| 2768 | /* |
| 2769 | * Flush all the blocks associated with a vnode. |
| 2770 | * Walk through the buffer pool and push any dirty pages |
| 2771 | * associated with the vnode. |
| 2772 | */ |
| 2773 | static int |
| 2774 | nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) |
| 2775 | { |
| 2776 | struct nfsnode *np = VTONFS(vp); |
| 2777 | struct buf *bp; |
| 2778 | int i; |
| 2779 | struct buf *nbp; |
| 2780 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
| 2781 | int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; |
| 2782 | int passone = 1; |
| 2783 | u_quad_t off, endoff, toff; |
| 2784 | struct buf **bvec = NULL; |
| 2785 | #ifndef NFS_COMMITBVECSIZ |
| 2786 | #define NFS_COMMITBVECSIZ 20 |
| 2787 | #endif |
| 2788 | struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; |
| 2789 | int bvecsize = 0, bveccount; |
| 2790 | |
| 2791 | if (nmp->nm_flag & NFSMNT_INT) |
| 2792 | slpflag = PCATCH; |
| 2793 | if (!commit) |
| 2794 | passone = 0; |
| 2795 | /* |
| 2796 | * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the |
| 2797 | * server, but nas not been committed to stable storage on the server |
| 2798 | * yet. On the first pass, the byte range is worked out and the commit |
| 2799 | * rpc is done. On the second pass, nfs_writebp() is called to do the |
| 2800 | * job. |
| 2801 | */ |
| 2802 | again: |
| 2803 | off = (u_quad_t)-1; |
| 2804 | endoff = 0; |
| 2805 | bvecpos = 0; |
| 2806 | if (NFS_ISV3(vp) && commit) { |
| 2807 | s = splbio(); |
| 2808 | /* |
| 2809 | * Count up how many buffers waiting for a commit. |
| 2810 | */ |
| 2811 | bveccount = 0; |
| 2812 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2813 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2814 | if (BUF_REFCNT(bp) == 0 && |
| 2815 | (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) |
| 2816 | == (B_DELWRI | B_NEEDCOMMIT)) |
| 2817 | bveccount++; |
| 2818 | } |
| 2819 | /* |
| 2820 | * Allocate space to remember the list of bufs to commit. It is |
| 2821 | * important to use M_NOWAIT here to avoid a race with nfs_write. |
| 2822 | * If we can't get memory (for whatever reason), we will end up |
| 2823 | * committing the buffers one-by-one in the loop below. |
| 2824 | */ |
| 2825 | if (bvec != NULL && bvec != bvec_on_stack) |
| 2826 | free(bvec, M_TEMP); |
| 2827 | if (bveccount > NFS_COMMITBVECSIZ) { |
| 2828 | bvec = (struct buf **) |
| 2829 | malloc(bveccount * sizeof(struct buf *), |
| 2830 | M_TEMP, M_NOWAIT); |
| 2831 | if (bvec == NULL) { |
| 2832 | bvec = bvec_on_stack; |
| 2833 | bvecsize = NFS_COMMITBVECSIZ; |
| 2834 | } else |
| 2835 | bvecsize = bveccount; |
| 2836 | } else { |
| 2837 | bvec = bvec_on_stack; |
| 2838 | bvecsize = NFS_COMMITBVECSIZ; |
| 2839 | } |
| 2840 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2841 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2842 | if (bvecpos >= bvecsize) |
| 2843 | break; |
| 2844 | if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != |
| 2845 | (B_DELWRI | B_NEEDCOMMIT) || |
| 2846 | BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) |
| 2847 | continue; |
| 2848 | bremfree(bp); |
| 2849 | /* |
| 2850 | * NOTE: we are not clearing B_DONE here, so we have |
| 2851 | * to do it later on in this routine if we intend to |
| 2852 | * initiate I/O on the bp. |
| 2853 | * |
| 2854 | * Note: to avoid loopback deadlocks, we do not |
| 2855 | * assign b_runningbufspace. |
| 2856 | */ |
| 2857 | bp->b_flags |= B_WRITEINPROG; |
| 2858 | vfs_busy_pages(bp, 1); |
| 2859 | |
| 2860 | /* |
| 2861 | * bp is protected by being locked, but nbp is not |
| 2862 | * and vfs_busy_pages() may sleep. We have to |
| 2863 | * recalculate nbp. |
| 2864 | */ |
| 2865 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2866 | |
| 2867 | /* |
| 2868 | * A list of these buffers is kept so that the |
| 2869 | * second loop knows which buffers have actually |
| 2870 | * been committed. This is necessary, since there |
| 2871 | * may be a race between the commit rpc and new |
| 2872 | * uncommitted writes on the file. |
| 2873 | */ |
| 2874 | bvec[bvecpos++] = bp; |
| 2875 | toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + |
| 2876 | bp->b_dirtyoff; |
| 2877 | if (toff < off) |
| 2878 | off = toff; |
| 2879 | toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); |
| 2880 | if (toff > endoff) |
| 2881 | endoff = toff; |
| 2882 | } |
| 2883 | splx(s); |
| 2884 | } |
| 2885 | if (bvecpos > 0) { |
| 2886 | /* |
| 2887 | * Commit data on the server, as required. Note that |
| 2888 | * nfs_commit will use the vnode's cred for the commit. |
| 2889 | */ |
| 2890 | retv = nfs_commit(vp, off, (int)(endoff - off), td); |
| 2891 | |
| 2892 | if (retv == NFSERR_STALEWRITEVERF) |
| 2893 | nfs_clearcommit(vp->v_mount); |
| 2894 | |
| 2895 | /* |
| 2896 | * Now, either mark the blocks I/O done or mark the |
| 2897 | * blocks dirty, depending on whether the commit |
| 2898 | * succeeded. |
| 2899 | */ |
| 2900 | for (i = 0; i < bvecpos; i++) { |
| 2901 | bp = bvec[i]; |
| 2902 | bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK); |
| 2903 | if (retv) { |
| 2904 | /* |
| 2905 | * Error, leave B_DELWRI intact |
| 2906 | */ |
| 2907 | vfs_unbusy_pages(bp); |
| 2908 | brelse(bp); |
| 2909 | } else { |
| 2910 | /* |
| 2911 | * Success, remove B_DELWRI ( bundirty() ). |
| 2912 | * |
| 2913 | * b_dirtyoff/b_dirtyend seem to be NFS |
| 2914 | * specific. We should probably move that |
| 2915 | * into bundirty(). XXX |
| 2916 | */ |
| 2917 | s = splbio(); |
| 2918 | vp->v_numoutput++; |
| 2919 | bp->b_flags |= B_ASYNC; |
| 2920 | bundirty(bp); |
| 2921 | bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); |
| 2922 | bp->b_dirtyoff = bp->b_dirtyend = 0; |
| 2923 | splx(s); |
| 2924 | biodone(bp); |
| 2925 | } |
| 2926 | } |
| 2927 | } |
| 2928 | |
| 2929 | /* |
| 2930 | * Start/do any write(s) that are required. |
| 2931 | */ |
| 2932 | loop: |
| 2933 | s = splbio(); |
| 2934 | for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 2935 | nbp = TAILQ_NEXT(bp, b_vnbufs); |
| 2936 | if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) { |
| 2937 | if (waitfor != MNT_WAIT || passone) |
| 2938 | continue; |
| 2939 | error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL, |
| 2940 | "nfsfsync", slpflag, slptimeo); |
| 2941 | splx(s); |
| 2942 | if (error == 0) |
| 2943 | panic("nfs_fsync: inconsistent lock"); |
| 2944 | if (error == ENOLCK) |
| 2945 | goto loop; |
| 2946 | if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) { |
| 2947 | error = EINTR; |
| 2948 | goto done; |
| 2949 | } |
| 2950 | if (slpflag == PCATCH) { |
| 2951 | slpflag = 0; |
| 2952 | slptimeo = 2 * hz; |
| 2953 | } |
| 2954 | goto loop; |
| 2955 | } |
| 2956 | if ((bp->b_flags & B_DELWRI) == 0) |
| 2957 | panic("nfs_fsync: not dirty"); |
| 2958 | if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { |
| 2959 | BUF_UNLOCK(bp); |
| 2960 | continue; |
| 2961 | } |
| 2962 | bremfree(bp); |
| 2963 | if (passone || !commit) |
| 2964 | bp->b_flags |= B_ASYNC; |
| 2965 | else |
| 2966 | bp->b_flags |= B_ASYNC | B_WRITEINPROG; |
| 2967 | splx(s); |
| 2968 | VOP_BWRITE(bp->b_vp, bp); |
| 2969 | goto loop; |
| 2970 | } |
| 2971 | splx(s); |
| 2972 | if (passone) { |
| 2973 | passone = 0; |
| 2974 | goto again; |
| 2975 | } |
| 2976 | if (waitfor == MNT_WAIT) { |
| 2977 | while (vp->v_numoutput) { |
| 2978 | vp->v_flag |= VBWAIT; |
| 2979 | error = tsleep((caddr_t)&vp->v_numoutput, |
| 2980 | slpflag, "nfsfsync", slptimeo); |
| 2981 | if (error) { |
| 2982 | if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) { |
| 2983 | error = EINTR; |
| 2984 | goto done; |
| 2985 | } |
| 2986 | if (slpflag == PCATCH) { |
| 2987 | slpflag = 0; |
| 2988 | slptimeo = 2 * hz; |
| 2989 | } |
| 2990 | } |
| 2991 | } |
| 2992 | if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) { |
| 2993 | goto loop; |
| 2994 | } |
| 2995 | } |
| 2996 | if (np->n_flag & NWRITEERR) { |
| 2997 | error = np->n_error; |
| 2998 | np->n_flag &= ~NWRITEERR; |
| 2999 | } |
| 3000 | done: |
| 3001 | if (bvec != NULL && bvec != bvec_on_stack) |
| 3002 | free(bvec, M_TEMP); |
| 3003 | return (error); |
| 3004 | } |
| 3005 | |
| 3006 | /* |
| 3007 | * NFS advisory byte-level locks. |
| 3008 | * Currently unsupported. |
| 3009 | * |
| 3010 | * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, |
| 3011 | * int a_flags) |
| 3012 | */ |
| 3013 | static int |
| 3014 | nfs_advlock(struct vop_advlock_args *ap) |
| 3015 | { |
| 3016 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3017 | |
| 3018 | /* |
| 3019 | * The following kludge is to allow diskless support to work |
| 3020 | * until a real NFS lockd is implemented. Basically, just pretend |
| 3021 | * that this is a local lock. |
| 3022 | */ |
| 3023 | return (lf_advlock(ap, &(np->n_lockf), np->n_size)); |
| 3024 | } |
| 3025 | |
| 3026 | /* |
| 3027 | * Print out the contents of an nfsnode. |
| 3028 | * |
| 3029 | * nfs_print(struct vnode *a_vp) |
| 3030 | */ |
| 3031 | static int |
| 3032 | nfs_print(struct vop_print_args *ap) |
| 3033 | { |
| 3034 | struct vnode *vp = ap->a_vp; |
| 3035 | struct nfsnode *np = VTONFS(vp); |
| 3036 | |
| 3037 | printf("tag VT_NFS, fileid %ld fsid 0x%x", |
| 3038 | np->n_vattr.va_fileid, np->n_vattr.va_fsid); |
| 3039 | if (vp->v_type == VFIFO) |
| 3040 | fifo_printinfo(vp); |
| 3041 | printf("\n"); |
| 3042 | return (0); |
| 3043 | } |
| 3044 | |
| 3045 | /* |
| 3046 | * Just call nfs_writebp() with the force argument set to 1. |
| 3047 | * |
| 3048 | * NOTE: B_DONE may or may not be set in a_bp on call. |
| 3049 | * |
| 3050 | * nfs_bwrite(struct vnode *a_bp) |
| 3051 | */ |
| 3052 | static int |
| 3053 | nfs_bwrite(struct vop_bwrite_args *ap) |
| 3054 | { |
| 3055 | return (nfs_writebp(ap->a_bp, 1, curthread)); |
| 3056 | } |
| 3057 | |
| 3058 | /* |
| 3059 | * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless |
| 3060 | * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set |
| 3061 | * B_CACHE if this is a VMIO buffer. |
| 3062 | */ |
| 3063 | int |
| 3064 | nfs_writebp(struct buf *bp, int force, struct thread *td) |
| 3065 | { |
| 3066 | int s; |
| 3067 | int oldflags = bp->b_flags; |
| 3068 | #if 0 |
| 3069 | int retv = 1; |
| 3070 | off_t off; |
| 3071 | #endif |
| 3072 | |
| 3073 | if (BUF_REFCNT(bp) == 0) |
| 3074 | panic("bwrite: buffer is not locked???"); |
| 3075 | |
| 3076 | if (bp->b_flags & B_INVAL) { |
| 3077 | brelse(bp); |
| 3078 | return(0); |
| 3079 | } |
| 3080 | |
| 3081 | bp->b_flags |= B_CACHE; |
| 3082 | |
| 3083 | /* |
| 3084 | * Undirty the bp. We will redirty it later if the I/O fails. |
| 3085 | */ |
| 3086 | |
| 3087 | s = splbio(); |
| 3088 | bundirty(bp); |
| 3089 | bp->b_flags &= ~(B_READ|B_DONE|B_ERROR); |
| 3090 | |
| 3091 | bp->b_vp->v_numoutput++; |
| 3092 | splx(s); |
| 3093 | |
| 3094 | /* |
| 3095 | * Note: to avoid loopback deadlocks, we do not |
| 3096 | * assign b_runningbufspace. |
| 3097 | */ |
| 3098 | vfs_busy_pages(bp, 1); |
| 3099 | |
| 3100 | if (force) |
| 3101 | bp->b_flags |= B_WRITEINPROG; |
| 3102 | BUF_KERNPROC(bp); |
| 3103 | VOP_STRATEGY(bp->b_vp, bp); |
| 3104 | |
| 3105 | if( (oldflags & B_ASYNC) == 0) { |
| 3106 | int rtval = biowait(bp); |
| 3107 | |
| 3108 | if (oldflags & B_DELWRI) { |
| 3109 | s = splbio(); |
| 3110 | reassignbuf(bp, bp->b_vp); |
| 3111 | splx(s); |
| 3112 | } |
| 3113 | |
| 3114 | brelse(bp); |
| 3115 | return (rtval); |
| 3116 | } |
| 3117 | |
| 3118 | return (0); |
| 3119 | } |
| 3120 | |
| 3121 | /* |
| 3122 | * nfs special file access vnode op. |
| 3123 | * Essentially just get vattr and then imitate iaccess() since the device is |
| 3124 | * local to the client. |
| 3125 | * |
| 3126 | * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
| 3127 | * struct thread *a_td) |
| 3128 | */ |
| 3129 | static int |
| 3130 | nfsspec_access(struct vop_access_args *ap) |
| 3131 | { |
| 3132 | struct vattr *vap; |
| 3133 | gid_t *gp; |
| 3134 | struct ucred *cred = ap->a_cred; |
| 3135 | struct vnode *vp = ap->a_vp; |
| 3136 | mode_t mode = ap->a_mode; |
| 3137 | struct vattr vattr; |
| 3138 | int i; |
| 3139 | int error; |
| 3140 | |
| 3141 | /* |
| 3142 | * Disallow write attempts on filesystems mounted read-only; |
| 3143 | * unless the file is a socket, fifo, or a block or character |
| 3144 | * device resident on the filesystem. |
| 3145 | */ |
| 3146 | if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 3147 | switch (vp->v_type) { |
| 3148 | case VREG: |
| 3149 | case VDIR: |
| 3150 | case VLNK: |
| 3151 | return (EROFS); |
| 3152 | default: |
| 3153 | break; |
| 3154 | } |
| 3155 | } |
| 3156 | /* |
| 3157 | * If you're the super-user, |
| 3158 | * you always get access. |
| 3159 | */ |
| 3160 | if (cred->cr_uid == 0) |
| 3161 | return (0); |
| 3162 | vap = &vattr; |
| 3163 | error = VOP_GETATTR(vp, vap, ap->a_td); |
| 3164 | if (error) |
| 3165 | return (error); |
| 3166 | /* |
| 3167 | * Access check is based on only one of owner, group, public. |
| 3168 | * If not owner, then check group. If not a member of the |
| 3169 | * group, then check public access. |
| 3170 | */ |
| 3171 | if (cred->cr_uid != vap->va_uid) { |
| 3172 | mode >>= 3; |
| 3173 | gp = cred->cr_groups; |
| 3174 | for (i = 0; i < cred->cr_ngroups; i++, gp++) |
| 3175 | if (vap->va_gid == *gp) |
| 3176 | goto found; |
| 3177 | mode >>= 3; |
| 3178 | found: |
| 3179 | ; |
| 3180 | } |
| 3181 | error = (vap->va_mode & mode) == mode ? 0 : EACCES; |
| 3182 | return (error); |
| 3183 | } |
| 3184 | |
| 3185 | /* |
| 3186 | * Read wrapper for special devices. |
| 3187 | * |
| 3188 | * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3189 | * struct ucred *a_cred) |
| 3190 | */ |
| 3191 | static int |
| 3192 | nfsspec_read(struct vop_read_args *ap) |
| 3193 | { |
| 3194 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3195 | |
| 3196 | /* |
| 3197 | * Set access flag. |
| 3198 | */ |
| 3199 | np->n_flag |= NACC; |
| 3200 | getnanotime(&np->n_atim); |
| 3201 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3202 | } |
| 3203 | |
| 3204 | /* |
| 3205 | * Write wrapper for special devices. |
| 3206 | * |
| 3207 | * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3208 | * struct ucred *a_cred) |
| 3209 | */ |
| 3210 | static int |
| 3211 | nfsspec_write(struct vop_write_args *ap) |
| 3212 | { |
| 3213 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3214 | |
| 3215 | /* |
| 3216 | * Set update flag. |
| 3217 | */ |
| 3218 | np->n_flag |= NUPD; |
| 3219 | getnanotime(&np->n_mtim); |
| 3220 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3221 | } |
| 3222 | |
| 3223 | /* |
| 3224 | * Close wrapper for special devices. |
| 3225 | * |
| 3226 | * Update the times on the nfsnode then do device close. |
| 3227 | * |
| 3228 | * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, |
| 3229 | * struct thread *a_td) |
| 3230 | */ |
| 3231 | static int |
| 3232 | nfsspec_close(struct vop_close_args *ap) |
| 3233 | { |
| 3234 | struct vnode *vp = ap->a_vp; |
| 3235 | struct nfsnode *np = VTONFS(vp); |
| 3236 | struct vattr vattr; |
| 3237 | |
| 3238 | if (np->n_flag & (NACC | NUPD)) { |
| 3239 | np->n_flag |= NCHG; |
| 3240 | if (vp->v_usecount == 1 && |
| 3241 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3242 | VATTR_NULL(&vattr); |
| 3243 | if (np->n_flag & NACC) |
| 3244 | vattr.va_atime = np->n_atim; |
| 3245 | if (np->n_flag & NUPD) |
| 3246 | vattr.va_mtime = np->n_mtim; |
| 3247 | (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td); |
| 3248 | } |
| 3249 | } |
| 3250 | return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3251 | } |
| 3252 | |
| 3253 | /* |
| 3254 | * Read wrapper for fifos. |
| 3255 | * |
| 3256 | * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3257 | * struct ucred *a_cred) |
| 3258 | */ |
| 3259 | static int |
| 3260 | nfsfifo_read(struct vop_read_args *ap) |
| 3261 | { |
| 3262 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3263 | |
| 3264 | /* |
| 3265 | * Set access flag. |
| 3266 | */ |
| 3267 | np->n_flag |= NACC; |
| 3268 | getnanotime(&np->n_atim); |
| 3269 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
| 3270 | } |
| 3271 | |
| 3272 | /* |
| 3273 | * Write wrapper for fifos. |
| 3274 | * |
| 3275 | * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, |
| 3276 | * struct ucred *a_cred) |
| 3277 | */ |
| 3278 | static int |
| 3279 | nfsfifo_write(struct vop_write_args *ap) |
| 3280 | { |
| 3281 | struct nfsnode *np = VTONFS(ap->a_vp); |
| 3282 | |
| 3283 | /* |
| 3284 | * Set update flag. |
| 3285 | */ |
| 3286 | np->n_flag |= NUPD; |
| 3287 | getnanotime(&np->n_mtim); |
| 3288 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
| 3289 | } |
| 3290 | |
| 3291 | /* |
| 3292 | * Close wrapper for fifos. |
| 3293 | * |
| 3294 | * Update the times on the nfsnode then do fifo close. |
| 3295 | * |
| 3296 | * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td) |
| 3297 | */ |
| 3298 | static int |
| 3299 | nfsfifo_close(struct vop_close_args *ap) |
| 3300 | { |
| 3301 | struct vnode *vp = ap->a_vp; |
| 3302 | struct nfsnode *np = VTONFS(vp); |
| 3303 | struct vattr vattr; |
| 3304 | struct timespec ts; |
| 3305 | |
| 3306 | if (np->n_flag & (NACC | NUPD)) { |
| 3307 | getnanotime(&ts); |
| 3308 | if (np->n_flag & NACC) |
| 3309 | np->n_atim = ts; |
| 3310 | if (np->n_flag & NUPD) |
| 3311 | np->n_mtim = ts; |
| 3312 | np->n_flag |= NCHG; |
| 3313 | if (vp->v_usecount == 1 && |
| 3314 | (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { |
| 3315 | VATTR_NULL(&vattr); |
| 3316 | if (np->n_flag & NACC) |
| 3317 | vattr.va_atime = np->n_atim; |
| 3318 | if (np->n_flag & NUPD) |
| 3319 | vattr.va_mtime = np->n_mtim; |
| 3320 | (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td); |
| 3321 | } |
| 3322 | } |
| 3323 | return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
| 3324 | } |
| 3325 | |