puffs_vnops.c revision 1.100
1 /* $NetBSD: puffs_vnops.c,v 1.100 2007/09/27 21:14:50 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.100 2007/09/27 21:14:50 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/fstrans.h> 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/vnode.h> 41 #include <sys/proc.h> 42 43 #include <uvm/uvm.h> 44 45 #include <fs/puffs/puffs_msgif.h> 46 #include <fs/puffs/puffs_sys.h> 47 48 #include <miscfs/fifofs/fifo.h> 49 #include <miscfs/genfs/genfs.h> 50 #include <miscfs/specfs/specdev.h> 51 52 int puffs_lookup(void *); 53 int puffs_create(void *); 54 int puffs_access(void *); 55 int puffs_mknod(void *); 56 int puffs_open(void *); 57 int puffs_close(void *); 58 int puffs_getattr(void *); 59 int puffs_setattr(void *); 60 int puffs_reclaim(void *); 61 int puffs_readdir(void *); 62 int puffs_poll(void *); 63 int puffs_fsync(void *); 64 int puffs_seek(void *); 65 int puffs_remove(void *); 66 int puffs_mkdir(void *); 67 int puffs_rmdir(void *); 68 int puffs_link(void *); 69 int puffs_readlink(void *); 70 int puffs_symlink(void *); 71 int puffs_rename(void *); 72 int puffs_read(void *); 73 int puffs_write(void *); 74 int puffs_fcntl(void *); 75 int puffs_ioctl(void *); 76 int puffs_inactive(void *); 77 int puffs_print(void *); 78 int puffs_pathconf(void *); 79 int puffs_advlock(void *); 80 int puffs_strategy(void *); 81 int puffs_bmap(void *); 82 int puffs_mmap(void *); 83 int puffs_getpages(void *); 84 85 int puffs_spec_read(void *); 86 int puffs_spec_write(void *); 87 int puffs_fifo_read(void *); 88 int puffs_fifo_write(void *); 89 90 int puffs_checkop(void *); 91 92 93 /* VOP_LEASE() not included */ 94 95 int puffs_generic(void *); 96 97 #if 0 98 #define puffs_lock genfs_lock 99 #define puffs_unlock genfs_unlock 100 #define puffs_islocked genfs_islocked 101 #else 102 int puffs_lock(void *); 103 int puffs_unlock(void *); 104 int puffs_islocked(void *); 105 #endif 106 107 int (**puffs_vnodeop_p)(void *); 108 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 109 { &vop_default_desc, vn_default_error }, 110 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 111 { &vop_create_desc, puffs_checkop }, /* create */ 112 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 113 { &vop_open_desc, puffs_open }, /* REAL open */ 114 { &vop_close_desc, puffs_checkop }, /* close */ 115 { &vop_access_desc, puffs_access }, /* REAL access */ 116 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 117 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 118 { &vop_read_desc, puffs_checkop }, /* read */ 119 { &vop_write_desc, puffs_checkop }, /* write */ 120 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 121 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 122 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 123 { &vop_seek_desc, puffs_checkop }, /* seek */ 124 { &vop_remove_desc, puffs_checkop }, /* remove */ 125 { &vop_link_desc, puffs_checkop }, /* link */ 126 { &vop_rename_desc, puffs_checkop }, /* rename */ 127 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 128 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 129 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 130 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 131 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 132 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 133 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 134 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 135 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 136 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 137 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 138 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 139 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 140 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 141 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 142 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 143 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 144 { &vop_print_desc, puffs_print }, /* REAL print */ 145 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 146 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 147 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 148 { &vop_poll_desc, puffs_poll }, /* REAL poll */ 149 150 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 151 { NULL, NULL } 152 }; 153 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 154 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 155 156 157 int (**puffs_specop_p)(void *); 158 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 161 { &vop_create_desc, spec_create }, /* genfs_badop */ 162 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 163 { &vop_open_desc, spec_open }, /* spec_open */ 164 { &vop_close_desc, spec_close }, /* spec_close */ 165 { &vop_access_desc, puffs_checkop }, /* access */ 166 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 167 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 168 { &vop_read_desc, puffs_spec_read }, /* update, read */ 169 { &vop_write_desc, puffs_spec_write }, /* update, write */ 170 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 #if 0 202 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 203 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 204 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 205 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 206 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 207 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, fifo_create }, /* genfs_badop */ 220 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 221 { &vop_open_desc, fifo_open }, /* open */ 222 { &vop_close_desc, fifo_close }, /* close */ 223 { &vop_access_desc, puffs_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 228 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 229 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 230 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 231 { &vop_poll_desc, fifo_poll }, /* poll */ 232 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 233 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 234 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 235 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 236 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 237 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 238 { &vop_link_desc, fifo_link }, /* genfs_badop */ 239 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 240 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 241 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 242 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 243 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 244 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 245 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 246 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 247 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 248 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 249 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 250 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 251 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 252 { &vop_print_desc, puffs_print }, /* REAL print */ 253 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 254 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 255 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 258 #if 0 259 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 260 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 261 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 262 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 263 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 264 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 265 #endif 266 { NULL, NULL } 267 }; 268 const struct vnodeopv_desc puffs_fifoop_opv_desc = 269 { &puffs_fifoop_p, puffs_fifoop_entries }; 270 271 272 /* "real" vnode operations */ 273 int (**puffs_msgop_p)(void *); 274 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 275 { &vop_default_desc, vn_default_error }, 276 { &vop_create_desc, puffs_create }, /* create */ 277 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 278 { &vop_open_desc, puffs_open }, /* open */ 279 { &vop_close_desc, puffs_close }, /* close */ 280 { &vop_access_desc, puffs_access }, /* access */ 281 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 282 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 283 { &vop_read_desc, puffs_read }, /* read */ 284 { &vop_write_desc, puffs_write }, /* write */ 285 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 286 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 287 { &vop_seek_desc, puffs_seek }, /* seek */ 288 { &vop_remove_desc, puffs_remove }, /* remove */ 289 { &vop_link_desc, puffs_link }, /* link */ 290 { &vop_rename_desc, puffs_rename }, /* rename */ 291 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 292 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 293 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 294 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 295 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 296 { &vop_print_desc, puffs_print }, /* print */ 297 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 298 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 299 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 300 { &vop_getpages_desc, puffs_getpages }, /* getpages */ 301 { NULL, NULL } 302 }; 303 const struct vnodeopv_desc puffs_msgop_opv_desc = 304 { &puffs_msgop_p, puffs_msgop_entries }; 305 306 307 #define ERROUT(err) \ 308 do { \ 309 error = err; \ 310 goto out; \ 311 } while (/*CONSTCOND*/0) 312 313 /* 314 * This is a generic vnode operation handler. It checks if the necessary 315 * operations for the called vnode operation are implemented by userspace 316 * and either returns a dummy return value or proceeds to call the real 317 * vnode operation from puffs_msgop_v. 318 * 319 * XXX: this should described elsewhere and autogenerated, the complexity 320 * of the vnode operations vectors and their interrelationships is also 321 * getting a bit out of hand. Another problem is that we need this same 322 * information in the fs server code, so keeping the two in sync manually 323 * is not a viable (long term) plan. 324 */ 325 326 /* not supported, handle locking protocol */ 327 #define CHECKOP_NOTSUPP(op) \ 328 case VOP_##op##_DESCOFFSET: \ 329 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 330 return genfs_eopnotsupp(v); \ 331 break 332 333 /* always succeed, no locking */ 334 #define CHECKOP_SUCCESS(op) \ 335 case VOP_##op##_DESCOFFSET: \ 336 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 337 return 0; \ 338 break 339 340 int 341 puffs_checkop(void *v) 342 { 343 struct vop_generic_args /* { 344 struct vnodeop_desc *a_desc; 345 spooky mystery contents; 346 } */ *ap = v; 347 struct vnodeop_desc *desc = ap->a_desc; 348 struct puffs_mount *pmp; 349 struct vnode *vp; 350 int offset, rv; 351 352 offset = ap->a_desc->vdesc_vp_offsets[0]; 353 #ifdef DIAGNOSTIC 354 if (offset == VDESC_NO_OFFSET) 355 panic("puffs_checkop: no vnode, why did you call me?"); 356 #endif 357 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 358 pmp = MPTOPUFFSMP(vp->v_mount); 359 360 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 361 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 362 363 if (!ALLOPS(pmp)) { 364 switch (desc->vdesc_offset) { 365 CHECKOP_NOTSUPP(CREATE); 366 CHECKOP_NOTSUPP(MKNOD); 367 CHECKOP_NOTSUPP(GETATTR); 368 CHECKOP_NOTSUPP(SETATTR); 369 CHECKOP_NOTSUPP(READ); 370 CHECKOP_NOTSUPP(WRITE); 371 CHECKOP_NOTSUPP(FCNTL); 372 CHECKOP_NOTSUPP(IOCTL); 373 CHECKOP_NOTSUPP(REMOVE); 374 CHECKOP_NOTSUPP(LINK); 375 CHECKOP_NOTSUPP(RENAME); 376 CHECKOP_NOTSUPP(MKDIR); 377 CHECKOP_NOTSUPP(RMDIR); 378 CHECKOP_NOTSUPP(SYMLINK); 379 CHECKOP_NOTSUPP(READDIR); 380 CHECKOP_NOTSUPP(READLINK); 381 CHECKOP_NOTSUPP(PRINT); 382 CHECKOP_NOTSUPP(PATHCONF); 383 CHECKOP_NOTSUPP(ADVLOCK); 384 385 CHECKOP_SUCCESS(ACCESS); 386 CHECKOP_SUCCESS(CLOSE); 387 CHECKOP_SUCCESS(SEEK); 388 389 case VOP_GETPAGES_DESCOFFSET: 390 if (!EXISTSOP(pmp, READ)) 391 return genfs_eopnotsupp(v); 392 break; 393 394 default: 395 panic("puffs_checkop: unhandled vnop %d", 396 desc->vdesc_offset); 397 } 398 } 399 400 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 401 402 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 403 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 404 405 return rv; 406 } 407 408 409 int 410 puffs_lookup(void *v) 411 { 412 struct vop_lookup_args /* { 413 const struct vnodeop_desc *a_desc; 414 struct vnode *a_dvp; 415 struct vnode **a_vpp; 416 struct componentname *a_cnp; 417 } */ *ap = v; 418 struct puffs_mount *pmp; 419 struct componentname *cnp; 420 struct vnode *vp, *dvp; 421 struct puffs_node *dpn; 422 int isdot; 423 int error; 424 425 PUFFS_VNREQ(lookup); 426 427 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 428 cnp = ap->a_cnp; 429 dvp = ap->a_dvp; 430 *ap->a_vpp = NULL; 431 432 /* r/o fs? we check create later to handle EEXIST */ 433 if ((cnp->cn_flags & ISLASTCN) 434 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 435 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 436 return EROFS; 437 438 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 439 440 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 441 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 442 443 /* 444 * Check if someone fed it into the cache 445 */ 446 if (PUFFS_USE_NAMECACHE(pmp)) { 447 error = cache_lookup(dvp, ap->a_vpp, cnp); 448 449 if (error >= 0) 450 return error; 451 } 452 453 if (isdot) { 454 vp = ap->a_dvp; 455 vref(vp); 456 *ap->a_vpp = vp; 457 return 0; 458 } 459 460 puffs_makecn(&lookup_arg.pvnr_cn, &lookup_arg.pvnr_cn_cred, 461 &lookup_arg.pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 462 463 if (cnp->cn_flags & ISDOTDOT) 464 VOP_UNLOCK(dvp, 0); 465 466 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 467 &lookup_arg, sizeof(lookup_arg), 0, dvp, NULL); 468 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 469 470 /* 471 * In case of error, there is no new vnode to play with, so be 472 * happy with the NULL value given to vpp in the beginning. 473 * Also, check if this really was an error or the target was not 474 * present. Either treat it as a non-error for CREATE/RENAME or 475 * enter the component into the negative name cache (if desired). 476 */ 477 if (error) { 478 if (error == ENOENT) { 479 /* don't allow to create files on r/o fs */ 480 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 481 && cnp->cn_nameiop == CREATE) { 482 error = EROFS; 483 484 /* adjust values if we are creating */ 485 } else if ((cnp->cn_flags & ISLASTCN) 486 && (cnp->cn_nameiop == CREATE 487 || cnp->cn_nameiop == RENAME)) { 488 cnp->cn_flags |= SAVENAME; 489 error = EJUSTRETURN; 490 491 /* save negative cache entry */ 492 } else { 493 if ((cnp->cn_flags & MAKEENTRY) 494 && PUFFS_USE_NAMECACHE(pmp)) 495 cache_enter(dvp, NULL, cnp); 496 } 497 } else if (error < 0 || error > ELAST) { 498 error = EINVAL; 499 } 500 goto out; 501 } 502 503 /* 504 * Check that we don't get our parent node back, that would cause 505 * a pretty obvious deadlock. 506 */ 507 dpn = dvp->v_data; 508 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 509 puffs_errnotify(pmp, PUFFS_ERR_LOOKUP, EINVAL, 510 lookup_arg.pvnr_newnode); 511 error = EPROTO; 512 goto out; 513 } 514 515 error = puffs_cookie2vnode(pmp, lookup_arg.pvnr_newnode, 1, 1, &vp); 516 if (error) { 517 error = puffs_getvnode(dvp->v_mount, 518 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 519 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 520 if (error) { 521 goto out; 522 } 523 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 524 } 525 *ap->a_vpp = vp; 526 527 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 528 cache_enter(dvp, vp, cnp); 529 530 /* XXX */ 531 if ((lookup_arg.pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 532 cnp->cn_flags &= ~REQUIREDIR; 533 if (lookup_arg.pvnr_cn.pkcn_consume) 534 cnp->cn_consume = MIN(lookup_arg.pvnr_cn.pkcn_consume, 535 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 536 537 out: 538 if (cnp->cn_flags & ISDOTDOT) 539 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 540 541 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 542 return error; 543 } 544 545 int 546 puffs_create(void *v) 547 { 548 struct vop_create_args /* { 549 const struct vnodeop_desc *a_desc; 550 struct vnode *a_dvp; 551 struct vnode **a_vpp; 552 struct componentname *a_cnp; 553 struct vattr *a_vap; 554 } */ *ap = v; 555 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 556 int error; 557 558 PUFFS_VNREQ(create); 559 560 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 561 ap->a_dvp, ap->a_cnp->cn_nameptr)); 562 563 puffs_makecn(&create_arg.pvnr_cn, &create_arg.pvnr_cn_cred, 564 &create_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 565 create_arg.pvnr_va = *ap->a_vap; 566 567 error = puffs_vntouser(pmp, PUFFS_VN_CREATE, 568 &create_arg, sizeof(create_arg), 0, ap->a_dvp, NULL); 569 if (error) 570 goto out; 571 572 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 573 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 574 /* XXX: in case of error, need to uncommit userspace transaction */ 575 576 out: 577 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 578 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 579 vput(ap->a_dvp); 580 581 DPRINTF(("puffs_create: return %d\n", error)); 582 return error; 583 } 584 585 int 586 puffs_mknod(void *v) 587 { 588 struct vop_mknod_args /* { 589 const struct vnodeop_desc *a_desc; 590 struct vnode *a_dvp; 591 struct vnode **a_vpp; 592 struct componentname *a_cnp; 593 struct vattr *a_vap; 594 } */ *ap = v; 595 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 596 int error; 597 598 PUFFS_VNREQ(mknod); 599 600 puffs_makecn(&mknod_arg.pvnr_cn, &mknod_arg.pvnr_cn_cred, 601 &mknod_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 602 mknod_arg.pvnr_va = *ap->a_vap; 603 604 error = puffs_vntouser(pmp, PUFFS_VN_MKNOD, 605 &mknod_arg, sizeof(mknod_arg), 0, ap->a_dvp, NULL); 606 if (error) 607 goto out; 608 609 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 610 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 611 ap->a_vap->va_rdev); 612 613 out: 614 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 615 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 616 vput(ap->a_dvp); 617 return error; 618 } 619 620 int 621 puffs_open(void *v) 622 { 623 struct vop_open_args /* { 624 const struct vnodeop_desc *a_desc; 625 struct vnode *a_vp; 626 int a_mode; 627 kauth_cred_t a_cred; 628 struct lwp *a_l; 629 } */ *ap = v; 630 struct vnode *vp = ap->a_vp; 631 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 632 int mode = ap->a_mode; 633 int error; 634 635 PUFFS_VNREQ(open); 636 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 637 638 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 639 ERROUT(EROFS); 640 641 if (!EXISTSOP(pmp, OPEN)) 642 ERROUT(0); 643 644 open_arg.pvnr_mode = mode; 645 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 646 puffs_cidcvt(&open_arg.pvnr_cid, ap->a_l); 647 648 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 649 &open_arg, sizeof(open_arg), 0, vp, NULL); 650 651 out: 652 DPRINTF(("puffs_open: returning %d\n", error)); 653 return error; 654 } 655 656 int 657 puffs_close(void *v) 658 { 659 struct vop_close_args /* { 660 const struct vnodeop_desc *a_desc; 661 struct vnode *a_vp; 662 int a_fflag; 663 kauth_cred_t a_cred; 664 struct lwp *a_l; 665 } */ *ap = v; 666 struct puffs_vnreq_close *close_argp; 667 668 close_argp = malloc(sizeof(struct puffs_vnreq_close), 669 M_PUFFS, M_WAITOK | M_ZERO); 670 close_argp->pvnr_fflag = ap->a_fflag; 671 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 672 puffs_cidcvt(&close_argp->pvnr_cid, ap->a_l); 673 674 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 675 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 676 677 return 0; 678 } 679 680 int 681 puffs_access(void *v) 682 { 683 struct vop_access_args /* { 684 const struct vnodeop_desc *a_desc; 685 struct vnode *a_vp; 686 int a_mode; 687 kauth_cred_t a_cred; 688 struct lwp *a_l; 689 } */ *ap = v; 690 struct vnode *vp = ap->a_vp; 691 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 692 int mode = ap->a_mode; 693 694 PUFFS_VNREQ(access); 695 696 if (mode & VWRITE) { 697 switch (vp->v_type) { 698 case VDIR: 699 case VLNK: 700 case VREG: 701 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 702 || !EXISTSOP(pmp, WRITE)) 703 return EROFS; 704 break; 705 default: 706 break; 707 } 708 } 709 710 if (!EXISTSOP(pmp, ACCESS)) 711 return 0; 712 713 access_arg.pvnr_mode = ap->a_mode; 714 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 715 puffs_cidcvt(&access_arg.pvnr_cid, ap->a_l); 716 717 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 718 &access_arg, sizeof(access_arg), 0, vp, NULL); 719 } 720 721 int 722 puffs_getattr(void *v) 723 { 724 struct vop_getattr_args /* { 725 const struct vnodeop_desc *a_desc; 726 struct vnode *a_vp; 727 struct vattr *a_vap; 728 kauth_cred_t a_cred; 729 struct lwp *a_l; 730 } */ *ap = v; 731 struct mount *mp; 732 struct vnode *vp; 733 struct vattr *vap, *rvap; 734 struct puffs_node *pn; 735 int error; 736 737 PUFFS_VNREQ(getattr); 738 739 vp = ap->a_vp; 740 mp = vp->v_mount; 741 vap = ap->a_vap; 742 743 vattr_null(&getattr_arg.pvnr_va); 744 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 745 puffs_cidcvt(&getattr_arg.pvnr_cid, ap->a_l); 746 747 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 748 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 749 if (error) 750 return error; 751 752 rvap = &getattr_arg.pvnr_va; 753 /* 754 * Don't listen to the file server regarding special device 755 * size info, the file server doesn't know anything about them. 756 */ 757 if (vp->v_type == VBLK || vp->v_type == VCHR) 758 rvap->va_size = vp->v_size; 759 760 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 761 if (vp->v_type == VBLK) 762 rvap->va_blocksize = BLKDEV_IOSIZE; 763 else if (vp->v_type == VCHR) 764 rvap->va_blocksize = MAXBSIZE; 765 766 (void) memcpy(vap, rvap, sizeof(struct vattr)); 767 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 768 769 pn = VPTOPP(vp); 770 if (pn->pn_stat & PNODE_METACACHE_ATIME) 771 vap->va_atime = pn->pn_mc_atime; 772 if (pn->pn_stat & PNODE_METACACHE_CTIME) 773 vap->va_ctime = pn->pn_mc_ctime; 774 if (pn->pn_stat & PNODE_METACACHE_MTIME) 775 vap->va_mtime = pn->pn_mc_mtime; 776 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 777 vap->va_size = pn->pn_mc_size; 778 } else { 779 if (rvap->va_size != VNOVAL 780 && vp->v_type != VBLK && vp->v_type != VCHR) { 781 uvm_vnp_setsize(vp, rvap->va_size); 782 pn->pn_serversize = rvap->va_size; 783 } 784 } 785 786 return 0; 787 } 788 789 static int 790 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 791 struct lwp *l, int chsize) 792 { 793 struct puffs_node *pn = vp->v_data; 794 int error; 795 796 PUFFS_VNREQ(setattr); 797 798 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 799 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 800 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 801 || vap->va_mode != (mode_t)VNOVAL)) 802 return EROFS; 803 804 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 805 && vp->v_type == VREG && vap->va_size != VNOVAL) 806 return EROFS; 807 808 /* 809 * Flush metacache first. If we are called with some explicit 810 * parameters, treat them as information overriding metacache 811 * information. 812 */ 813 if (pn->pn_stat & PNODE_METACACHE_MASK) { 814 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 815 && vap->va_atime.tv_sec == VNOVAL) 816 vap->va_atime = pn->pn_mc_atime; 817 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 818 && vap->va_ctime.tv_sec == VNOVAL) 819 vap->va_ctime = pn->pn_mc_ctime; 820 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 821 && vap->va_mtime.tv_sec == VNOVAL) 822 vap->va_mtime = pn->pn_mc_mtime; 823 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 824 && vap->va_size == VNOVAL) 825 vap->va_size = pn->pn_mc_size; 826 827 pn->pn_stat &= ~PNODE_METACACHE_MASK; 828 } 829 830 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 831 puffs_credcvt(&setattr_arg.pvnr_cred, cred); 832 puffs_cidcvt(&setattr_arg.pvnr_cid, l); 833 834 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_SETATTR, 835 &setattr_arg, sizeof(setattr_arg), 0, vp, NULL); 836 if (error) 837 return error; 838 839 if (vap->va_size != VNOVAL) { 840 pn->pn_serversize = vap->va_size; 841 if (chsize) 842 uvm_vnp_setsize(vp, vap->va_size); 843 } 844 845 return 0; 846 } 847 848 int 849 puffs_setattr(void *v) 850 { 851 struct vop_getattr_args /* { 852 const struct vnodeop_desc *a_desc; 853 struct vnode *a_vp; 854 struct vattr *a_vap; 855 kauth_cred_t a_cred; 856 struct lwp *a_l; 857 } */ *ap = v; 858 859 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 860 } 861 862 int 863 puffs_inactive(void *v) 864 { 865 struct vop_inactive_args /* { 866 const struct vnodeop_desc *a_desc; 867 struct vnode *a_vp; 868 struct lwp *a_l; 869 } */ *ap = v; 870 struct puffs_mount *pmp; 871 struct puffs_node *pnode; 872 int rv, call; 873 874 PUFFS_VNREQ(inactive); 875 876 /* 877 * XXX: think about this after we really start unlocking 878 * when going to userspace 879 */ 880 pnode = ap->a_vp->v_data; 881 882 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 883 884 puffs_cidcvt(&inactive_arg.pvnr_cid, ap->a_l); 885 886 if (EXISTSOP(pmp, INACTIVE)) 887 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 888 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 889 call = 1; 890 else 891 call = 0; 892 else 893 call = 1; 894 else 895 call = 0; 896 897 if (call) 898 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 899 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 900 else 901 rv = 1; /* see below */ 902 pnode->pn_stat &= ~PNODE_DOINACT; 903 904 VOP_UNLOCK(ap->a_vp, 0); 905 906 /* 907 * file server thinks it's gone? then don't be afraid care, 908 * node's life was already all it would ever be 909 */ 910 if (pnode->pn_stat & PNODE_NOREFS) { 911 pnode->pn_stat |= PNODE_DYING; 912 vrecycle(ap->a_vp, NULL, ap->a_l); 913 } 914 915 return 0; 916 } 917 918 /* 919 * always FAF, we don't really care if the server wants to fail to 920 * reclaim the node or not 921 */ 922 int 923 puffs_reclaim(void *v) 924 { 925 struct vop_reclaim_args /* { 926 const struct vnodeop_desc *a_desc; 927 struct vnode *a_vp; 928 struct lwp *a_l; 929 } */ *ap = v; 930 struct puffs_mount *pmp; 931 struct puffs_vnreq_reclaim *reclaim_argp; 932 933 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 934 935 /* 936 * first things first: check if someone is trying to reclaim the 937 * root vnode. do not allow that to travel to userspace. 938 * Note that we don't need to take the lock similarly to 939 * puffs_root(), since there is only one of us. 940 */ 941 if (ap->a_vp->v_flag & VROOT) { 942 mutex_enter(&pmp->pmp_lock); 943 KASSERT(pmp->pmp_root != NULL); 944 pmp->pmp_root = NULL; 945 mutex_exit(&pmp->pmp_lock); 946 goto out; 947 } 948 949 if (!EXISTSOP(pmp, RECLAIM)) 950 goto out; 951 952 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 953 M_PUFFS, M_WAITOK | M_ZERO); 954 puffs_cidcvt(&reclaim_argp->pvnr_cid, ap->a_l); 955 956 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 957 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 958 959 out: 960 if (PUFFS_USE_NAMECACHE(pmp)) 961 cache_purge(ap->a_vp); 962 puffs_putvnode(ap->a_vp); 963 964 return 0; 965 } 966 967 #define CSIZE sizeof(**ap->a_cookies) 968 int 969 puffs_readdir(void *v) 970 { 971 struct vop_readdir_args /* { 972 const struct vnodeop_desc *a_desc; 973 struct vnode *a_vp; 974 struct uio *a_uio; 975 kauth_cred_t a_cred; 976 int *a_eofflag; 977 off_t **a_cookies; 978 int *a_ncookies; 979 } */ *ap = v; 980 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 981 struct puffs_vnreq_readdir *readdir_argp; 982 size_t argsize, tomove, cookiemem, cookiesmax; 983 struct uio *uio = ap->a_uio; 984 size_t howmuch, resid; 985 int error; 986 987 /* 988 * ok, so we need: resid + cookiemem = maxreq 989 * => resid + cookiesize * (resid/minsize) = maxreq 990 * => resid + cookiesize/minsize * resid = maxreq 991 * => (cookiesize/minsize + 1) * resid = maxreq 992 * => resid = maxreq / (cookiesize/minsize + 1) 993 * 994 * Since cookiesize <= minsize and we're not very big on floats, 995 * we approximate that to be 1. Therefore: 996 * 997 * resid = maxreq / 2; 998 * 999 * Well, at least we didn't have to use differential equations 1000 * or the Gram-Schmidt process. 1001 * 1002 * (yes, I'm very afraid of this) 1003 */ 1004 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1005 1006 if (ap->a_cookies) { 1007 KASSERT(ap->a_ncookies != NULL); 1008 if (pmp->pmp_args.pa_fhsize == 0) 1009 return EOPNOTSUPP; 1010 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1011 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1012 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1013 } else { 1014 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1015 cookiesmax = 0; 1016 cookiemem = 0; 1017 } 1018 1019 argsize = sizeof(struct puffs_vnreq_readdir); 1020 tomove = resid + cookiemem; 1021 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 1022 1023 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 1024 readdir_argp->pvnr_offset = uio->uio_offset; 1025 readdir_argp->pvnr_resid = resid; 1026 readdir_argp->pvnr_ncookies = cookiesmax; 1027 readdir_argp->pvnr_eofflag = 0; 1028 readdir_argp->pvnr_dentoff = cookiemem; 1029 1030 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1031 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 1032 ap->a_vp, NULL); 1033 if (error) 1034 goto out; 1035 1036 /* userspace is cheating? */ 1037 if (readdir_argp->pvnr_resid > resid 1038 || readdir_argp->pvnr_ncookies > cookiesmax) { 1039 puffs_errnotify(pmp, PUFFS_ERR_READDIR, E2BIG, 1040 VPTOPNC(ap->a_vp)); 1041 ERROUT(EPROTO); 1042 } 1043 1044 /* check eof */ 1045 if (readdir_argp->pvnr_eofflag) 1046 *ap->a_eofflag = 1; 1047 1048 /* bouncy-wouncy with the directory data */ 1049 howmuch = resid - readdir_argp->pvnr_resid; 1050 1051 /* force eof if no data was returned (getcwd() needs this) */ 1052 if (howmuch == 0) { 1053 *ap->a_eofflag = 1; 1054 goto out; 1055 } 1056 1057 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 1058 if (error) 1059 goto out; 1060 1061 /* provide cookies to caller if so desired */ 1062 if (ap->a_cookies) { 1063 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 1064 M_TEMP, M_WAITOK); 1065 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 1066 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 1067 *ap->a_ncookies*CSIZE); 1068 } 1069 1070 /* next readdir starts here */ 1071 uio->uio_offset = readdir_argp->pvnr_offset; 1072 1073 out: 1074 free(readdir_argp, M_PUFFS); 1075 return error; 1076 } 1077 #undef CSIZE 1078 1079 /* 1080 * poll works by consuming the bitmask in pn_revents. If there are 1081 * events available, poll returns immediately. If not, it issues a 1082 * poll to userspace, selrecords itself and returns with no available 1083 * events. When the file server returns, it executes puffs_parkdone_poll(), 1084 * where available events are added to the bitmask. selnotify() is 1085 * then also executed by that function causing us to enter here again 1086 * and hopefully find the missing bits (unless someone got them first, 1087 * in which case it starts all over again). 1088 */ 1089 int 1090 puffs_poll(void *v) 1091 { 1092 struct vop_poll_args /* { 1093 const struct vnodeop_desc *a_desc; 1094 struct vnode *a_vp; 1095 int a_events; 1096 struct lwp *a_l; 1097 }*/ *ap = v; 1098 struct vnode *vp = ap->a_vp; 1099 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1100 struct puffs_vnreq_poll *poll_argp; 1101 struct puffs_node *pn = vp->v_data; 1102 int events; 1103 1104 if (EXISTSOP(pmp, POLL)) { 1105 mutex_enter(&pn->pn_mtx); 1106 events = pn->pn_revents & ap->a_events; 1107 if (events & ap->a_events) { 1108 pn->pn_revents &= ~ap->a_events; 1109 mutex_exit(&pn->pn_mtx); 1110 1111 return events; 1112 } else { 1113 puffs_referencenode(pn); 1114 mutex_exit(&pn->pn_mtx); 1115 1116 /* freed in puffs_parkdone_poll */ 1117 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1118 M_PUFFS, M_ZERO | M_WAITOK); 1119 1120 poll_argp->pvnr_events = ap->a_events; 1121 puffs_cidcvt(&poll_argp->pvnr_cid, ap->a_l); 1122 1123 selrecord(ap->a_l, &pn->pn_sel); 1124 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1125 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1126 puffs_parkdone_poll, pn, 1127 vp, NULL); 1128 1129 return 0; 1130 } 1131 } else { 1132 return genfs_poll(v); 1133 } 1134 } 1135 1136 int 1137 puffs_fsync(void *v) 1138 { 1139 struct vop_fsync_args /* { 1140 const struct vnodeop_desc *a_desc; 1141 struct vnode *a_vp; 1142 kauth_cred_t a_cred; 1143 int a_flags; 1144 off_t a_offlo; 1145 off_t a_offhi; 1146 struct lwp *a_l; 1147 } */ *ap = v; 1148 struct vattr va; 1149 struct puffs_mount *pmp; 1150 struct puffs_vnreq_fsync *fsync_argp; 1151 struct vnode *vp; 1152 struct puffs_node *pn; 1153 int pflags, error, dofaf; 1154 1155 PUFFS_VNREQ(fsync); 1156 1157 vp = ap->a_vp; 1158 pn = VPTOPP(vp); 1159 pmp = MPTOPUFFSMP(vp->v_mount); 1160 1161 /* flush out information from our metacache, see vop_setattr */ 1162 if (pn->pn_stat & PNODE_METACACHE_MASK 1163 && (pn->pn_stat & PNODE_DYING) == 0) { 1164 vattr_null(&va); 1165 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1166 if (error) 1167 return error; 1168 } 1169 1170 /* 1171 * flush pages to avoid being overly dirty 1172 */ 1173 pflags = PGO_CLEANIT; 1174 if (ap->a_flags & FSYNC_WAIT) 1175 pflags |= PGO_SYNCIO; 1176 simple_lock(&vp->v_interlock); 1177 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1178 round_page(ap->a_offhi), pflags); 1179 if (error) 1180 return error; 1181 1182 /* 1183 * HELLO! We exit already here if the user server does not 1184 * support fsync OR if we should call fsync for a node which 1185 * has references neither in the kernel or the fs server. 1186 * Otherwise we continue to issue fsync() forward. 1187 */ 1188 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1189 return 0; 1190 1191 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1192 /* 1193 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1194 * only FAFs for those. Otherwise there's a danger of deadlock, 1195 * since the execution context here might be the user server 1196 * doing some operation on another fs, which in turn caused a 1197 * vnode to be reclaimed from the freelist for this fs. 1198 */ 1199 if (dofaf == 0) { 1200 simple_lock(&vp->v_interlock); 1201 if (vp->v_flag & VXLOCK) 1202 dofaf = 1; 1203 simple_unlock(&vp->v_interlock); 1204 } 1205 1206 if (dofaf == 0) { 1207 fsync_argp = &fsync_arg; 1208 } else { 1209 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1210 M_PUFFS, M_ZERO | M_NOWAIT); 1211 if (fsync_argp == NULL) 1212 return ENOMEM; 1213 } 1214 1215 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1216 fsync_argp->pvnr_flags = ap->a_flags; 1217 fsync_argp->pvnr_offlo = ap->a_offlo; 1218 fsync_argp->pvnr_offhi = ap->a_offhi; 1219 puffs_cidcvt(&fsync_argp->pvnr_cid, ap->a_l); 1220 1221 /* 1222 * XXX: see comment at puffs_getattr about locking 1223 * 1224 * If we are not required to wait, do a FAF operation. 1225 * Otherwise block here. 1226 */ 1227 if (dofaf == 0) { 1228 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1229 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1230 vp, NULL); 1231 } else { 1232 /* FAF is always "succesful" */ 1233 error = 0; 1234 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1235 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1236 } 1237 1238 return error; 1239 } 1240 1241 int 1242 puffs_seek(void *v) 1243 { 1244 struct vop_seek_args /* { 1245 const struct vnodeop_desc *a_desc; 1246 struct vnode *a_vp; 1247 off_t a_oldoff; 1248 off_t a_newoff; 1249 kauth_cred_t a_cred; 1250 } */ *ap = v; 1251 1252 PUFFS_VNREQ(seek); 1253 1254 seek_arg.pvnr_oldoff = ap->a_oldoff; 1255 seek_arg.pvnr_newoff = ap->a_newoff; 1256 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1257 1258 /* 1259 * XXX: seems like seek is called with an unlocked vp, but 1260 * it can't hurt to play safe 1261 */ 1262 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1263 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1264 } 1265 1266 int 1267 puffs_remove(void *v) 1268 { 1269 struct vop_remove_args /* { 1270 const struct vnodeop_desc *a_desc; 1271 struct vnode *a_dvp; 1272 struct vnode *a_vp; 1273 struct componentname *a_cnp; 1274 } */ *ap = v; 1275 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1276 int error; 1277 1278 PUFFS_VNREQ(remove); 1279 1280 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1281 puffs_makecn(&remove_arg.pvnr_cn, &remove_arg.pvnr_cn_cred, 1282 &remove_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1283 1284 error = puffs_vntouser(pmp, PUFFS_VN_REMOVE, 1285 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1286 1287 vput(ap->a_vp); 1288 if (ap->a_dvp == ap->a_vp) 1289 vrele(ap->a_dvp); 1290 else 1291 vput(ap->a_dvp); 1292 1293 return error; 1294 } 1295 1296 int 1297 puffs_mkdir(void *v) 1298 { 1299 struct vop_mkdir_args /* { 1300 const struct vnodeop_desc *a_desc; 1301 struct vnode *a_dvp; 1302 struct vnode **a_vpp; 1303 struct componentname *a_cnp; 1304 struct vattr *a_vap; 1305 } */ *ap = v; 1306 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1307 int error; 1308 1309 PUFFS_VNREQ(mkdir); 1310 1311 puffs_makecn(&mkdir_arg.pvnr_cn, &mkdir_arg.pvnr_cn_cred, 1312 &mkdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1313 mkdir_arg.pvnr_va = *ap->a_vap; 1314 1315 error = puffs_vntouser(pmp, PUFFS_VN_MKDIR, 1316 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1317 if (error) 1318 goto out; 1319 1320 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1321 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1322 1323 out: 1324 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1325 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1326 vput(ap->a_dvp); 1327 return error; 1328 } 1329 1330 int 1331 puffs_rmdir(void *v) 1332 { 1333 struct vop_rmdir_args /* { 1334 const struct vnodeop_desc *a_desc; 1335 struct vnode *a_dvp; 1336 struct vnode *a_vp; 1337 struct componentname *a_cnp; 1338 } */ *ap = v; 1339 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1340 int error; 1341 1342 PUFFS_VNREQ(rmdir); 1343 1344 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1345 puffs_makecn(&rmdir_arg.pvnr_cn, &rmdir_arg.pvnr_cn_cred, 1346 &rmdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1347 1348 error = puffs_vntouser(pmp, PUFFS_VN_RMDIR, 1349 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1350 1351 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1352 1353 vput(ap->a_dvp); 1354 vput(ap->a_vp); 1355 1356 return error; 1357 } 1358 1359 int 1360 puffs_link(void *v) 1361 { 1362 struct vop_link_args /* { 1363 const struct vnodeop_desc *a_desc; 1364 struct vnode *a_dvp; 1365 struct vnode *a_vp; 1366 struct componentname *a_cnp; 1367 }*/ *ap = v; 1368 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1369 int error; 1370 1371 PUFFS_VNREQ(link); 1372 1373 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1374 puffs_makecn(&link_arg.pvnr_cn, &link_arg.pvnr_cn_cred, 1375 &link_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1376 1377 error = puffs_vntouser(pmp, PUFFS_VN_LINK, 1378 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1379 1380 /* 1381 * XXX: stay in touch with the cache. I don't like this, but 1382 * don't have a better solution either. See also puffs_rename(). 1383 */ 1384 if (error == 0) 1385 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1386 1387 vput(ap->a_dvp); 1388 1389 return error; 1390 } 1391 1392 int 1393 puffs_symlink(void *v) 1394 { 1395 struct vop_symlink_args /* { 1396 const struct vnodeop_desc *a_desc; 1397 struct vnode *a_dvp; 1398 struct vnode **a_vpp; 1399 struct componentname *a_cnp; 1400 struct vattr *a_vap; 1401 char *a_target; 1402 }*/ *ap = v; 1403 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1404 struct puffs_vnreq_symlink *symlink_argp; 1405 int error; 1406 1407 *ap->a_vpp = NULL; 1408 1409 symlink_argp = malloc(sizeof(struct puffs_vnreq_symlink), 1410 M_PUFFS, M_ZERO | M_WAITOK); 1411 puffs_makecn(&symlink_argp->pvnr_cn, &symlink_argp->pvnr_cn_cred, 1412 &symlink_argp->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1413 symlink_argp->pvnr_va = *ap->a_vap; 1414 (void)strlcpy(symlink_argp->pvnr_link, ap->a_target, 1415 sizeof(symlink_argp->pvnr_link)); 1416 1417 error = puffs_vntouser(pmp, PUFFS_VN_SYMLINK, 1418 symlink_argp, sizeof(*symlink_argp), 0, ap->a_dvp, NULL); 1419 if (error) 1420 goto out; 1421 1422 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1423 symlink_argp->pvnr_newnode, ap->a_cnp, VLNK, 0); 1424 1425 out: 1426 free(symlink_argp, M_PUFFS); 1427 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1428 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1429 vput(ap->a_dvp); 1430 1431 return error; 1432 } 1433 1434 int 1435 puffs_readlink(void *v) 1436 { 1437 struct vop_readlink_args /* { 1438 const struct vnodeop_desc *a_desc; 1439 struct vnode *a_vp; 1440 struct uio *a_uio; 1441 kauth_cred_t a_cred; 1442 } */ *ap = v; 1443 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1444 size_t linklen; 1445 int error; 1446 1447 PUFFS_VNREQ(readlink); 1448 1449 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1450 linklen = sizeof(readlink_arg.pvnr_link); 1451 readlink_arg.pvnr_linklen = linklen; 1452 1453 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1454 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1455 ap->a_vp, NULL); 1456 if (error) 1457 return error; 1458 1459 /* bad bad user file server */ 1460 if (readlink_arg.pvnr_linklen > linklen) { 1461 puffs_errnotify(pmp, PUFFS_ERR_READLINK, E2BIG, 1462 VPTOPNC(ap->a_vp)); 1463 return EPROTO; 1464 } 1465 1466 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1467 ap->a_uio); 1468 } 1469 1470 int 1471 puffs_rename(void *v) 1472 { 1473 struct vop_rename_args /* { 1474 const struct vnodeop_desc *a_desc; 1475 struct vnode *a_fdvp; 1476 struct vnode *a_fvp; 1477 struct componentname *a_fcnp; 1478 struct vnode *a_tdvp; 1479 struct vnode *a_tvp; 1480 struct componentname *a_tcnp; 1481 }*/ *ap = v; 1482 struct puffs_vnreq_rename *rename_argp = NULL; 1483 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_fdvp->v_mount); 1484 int error; 1485 1486 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1487 ERROUT(EXDEV); 1488 1489 rename_argp = malloc(sizeof(struct puffs_vnreq_rename), 1490 M_PUFFS, M_WAITOK | M_ZERO); 1491 1492 rename_argp->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1493 rename_argp->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1494 if (ap->a_tvp) 1495 rename_argp->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1496 else 1497 rename_argp->pvnr_cookie_targ = NULL; 1498 puffs_makecn(&rename_argp->pvnr_cn_src, 1499 &rename_argp->pvnr_cn_src_cred, &rename_argp->pvnr_cn_src_cid, 1500 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1501 puffs_makecn(&rename_argp->pvnr_cn_targ, 1502 &rename_argp->pvnr_cn_targ_cred, &rename_argp->pvnr_cn_targ_cid, 1503 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1504 1505 error = puffs_vntouser(pmp, PUFFS_VN_RENAME, 1506 rename_argp, sizeof(*rename_argp), 0, ap->a_fdvp, NULL); /* XXX */ 1507 1508 /* 1509 * XXX: stay in touch with the cache. I don't like this, but 1510 * don't have a better solution either. See also puffs_link(). 1511 */ 1512 if (error == 0) 1513 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1514 1515 out: 1516 if (rename_argp) 1517 free(rename_argp, M_PUFFS); 1518 if (ap->a_tvp != NULL) 1519 vput(ap->a_tvp); 1520 if (ap->a_tdvp == ap->a_tvp) 1521 vrele(ap->a_tdvp); 1522 else 1523 vput(ap->a_tdvp); 1524 1525 vrele(ap->a_fdvp); 1526 vrele(ap->a_fvp); 1527 1528 return error; 1529 } 1530 1531 #define RWARGS(cont, iofl, move, offset, creds) \ 1532 (cont)->pvnr_ioflag = (iofl); \ 1533 (cont)->pvnr_resid = (move); \ 1534 (cont)->pvnr_offset = (offset); \ 1535 puffs_credcvt(&(cont)->pvnr_cred, creds) 1536 1537 int 1538 puffs_read(void *v) 1539 { 1540 struct vop_read_args /* { 1541 const struct vnodeop_desc *a_desc; 1542 struct vnode *a_vp; 1543 struct uio *a_uio; 1544 int a_ioflag; 1545 kauth_cred_t a_cred; 1546 } */ *ap = v; 1547 struct puffs_vnreq_read *read_argp; 1548 struct puffs_mount *pmp; 1549 struct vnode *vp; 1550 struct uio *uio; 1551 void *win; 1552 size_t tomove, argsize; 1553 vsize_t bytelen; 1554 int error, ubcflags; 1555 1556 uio = ap->a_uio; 1557 vp = ap->a_vp; 1558 read_argp = NULL; 1559 error = 0; 1560 pmp = MPTOPUFFSMP(vp->v_mount); 1561 1562 /* std sanity */ 1563 if (uio->uio_resid == 0) 1564 return 0; 1565 if (uio->uio_offset < 0) 1566 return EINVAL; 1567 1568 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1569 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1570 1571 ubcflags = 0; 1572 if (UBC_WANT_UNMAP(vp)) 1573 ubcflags = UBC_UNMAP; 1574 1575 while (uio->uio_resid > 0) { 1576 bytelen = MIN(uio->uio_resid, 1577 vp->v_size - uio->uio_offset); 1578 if (bytelen == 0) 1579 break; 1580 1581 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1582 &bytelen, advice, UBC_READ); 1583 error = uiomove(win, bytelen, uio); 1584 ubc_release(win, ubcflags); 1585 if (error) 1586 break; 1587 } 1588 1589 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1590 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1591 } else { 1592 /* 1593 * in case it's not a regular file or we're operating 1594 * uncached, do read in the old-fashioned style, 1595 * i.e. explicit read operations 1596 */ 1597 1598 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1599 argsize = sizeof(struct puffs_vnreq_read); 1600 read_argp = malloc(argsize + tomove, 1601 M_PUFFS, M_WAITOK | M_ZERO); 1602 1603 error = 0; 1604 while (uio->uio_resid > 0) { 1605 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1606 RWARGS(read_argp, ap->a_ioflag, tomove, 1607 uio->uio_offset, ap->a_cred); 1608 1609 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1610 read_argp, argsize, tomove, 1611 ap->a_vp, NULL); 1612 if (error) 1613 break; 1614 1615 if (read_argp->pvnr_resid > tomove) { 1616 puffs_errnotify(pmp, PUFFS_ERR_READ, 1617 E2BIG, VPTOPNC(ap->a_vp)); 1618 error = EPROTO; 1619 break; 1620 } 1621 1622 error = uiomove(read_argp->pvnr_data, 1623 tomove - read_argp->pvnr_resid, uio); 1624 1625 /* 1626 * in case the file is out of juice, resid from 1627 * userspace is != 0. and the error-case is 1628 * quite obvious 1629 */ 1630 if (error || read_argp->pvnr_resid) 1631 break; 1632 } 1633 } 1634 1635 if (read_argp) 1636 free(read_argp, M_PUFFS); 1637 return error; 1638 } 1639 1640 /* 1641 * XXX: in case of a failure, this leaves uio in a bad state. 1642 * We could theoretically copy the uio and iovecs and "replay" 1643 * them the right amount after the userspace trip, but don't 1644 * bother for now. 1645 */ 1646 int 1647 puffs_write(void *v) 1648 { 1649 struct vop_write_args /* { 1650 const struct vnodeop_desc *a_desc; 1651 struct vnode *a_vp; 1652 struct uio *a_uio; 1653 int a_ioflag; 1654 kauth_cred_t a_cred; 1655 } */ *ap = v; 1656 struct puffs_vnreq_write *write_argp; 1657 struct puffs_mount *pmp; 1658 struct uio *uio; 1659 struct vnode *vp; 1660 size_t tomove, argsize; 1661 off_t oldoff, newoff, origoff; 1662 vsize_t bytelen; 1663 int error, uflags; 1664 int ubcflags; 1665 1666 vp = ap->a_vp; 1667 uio = ap->a_uio; 1668 error = uflags = 0; 1669 write_argp = NULL; 1670 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1671 1672 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1673 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1674 if (UBC_WANT_UNMAP(vp)) 1675 ubcflags |= UBC_UNMAP; 1676 1677 /* 1678 * userspace *should* be allowed to control this, 1679 * but with UBC it's a bit unclear how to handle it 1680 */ 1681 if (ap->a_ioflag & IO_APPEND) 1682 uio->uio_offset = vp->v_size; 1683 1684 origoff = uio->uio_offset; 1685 while (uio->uio_resid > 0) { 1686 uflags |= PUFFS_UPDATECTIME; 1687 uflags |= PUFFS_UPDATEMTIME; 1688 oldoff = uio->uio_offset; 1689 bytelen = uio->uio_resid; 1690 1691 newoff = oldoff + bytelen; 1692 if (vp->v_size < newoff) { 1693 uvm_vnp_setwritesize(vp, newoff); 1694 } 1695 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1696 UVM_ADV_RANDOM, ubcflags); 1697 1698 /* 1699 * In case of a ubc_uiomove() error, 1700 * opt to not extend the file at all and 1701 * return an error. Otherwise, if we attempt 1702 * to clear the memory we couldn't fault to, 1703 * we might generate a kernel page fault. 1704 */ 1705 if (vp->v_size < newoff) { 1706 if (error == 0) { 1707 uflags |= PUFFS_UPDATESIZE; 1708 uvm_vnp_setsize(vp, newoff); 1709 } else { 1710 uvm_vnp_setwritesize(vp, vp->v_size); 1711 } 1712 } 1713 if (error) 1714 break; 1715 1716 /* 1717 * If we're writing large files, flush to file server 1718 * every 64k. Otherwise we can very easily exhaust 1719 * kernel and user memory, as the file server cannot 1720 * really keep up with our writing speed. 1721 * 1722 * Note: this does *NOT* honor MNT_ASYNC, because 1723 * that gives userland too much say in the kernel. 1724 */ 1725 if (oldoff >> 16 != uio->uio_offset >> 16) { 1726 simple_lock(&vp->v_interlock); 1727 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1728 uio->uio_offset & ~0xffff, 1729 PGO_CLEANIT | PGO_SYNCIO); 1730 if (error) 1731 break; 1732 } 1733 } 1734 1735 /* synchronous I/O? */ 1736 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1737 simple_lock(&vp->v_interlock); 1738 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1739 round_page(uio->uio_offset), 1740 PGO_CLEANIT | PGO_SYNCIO); 1741 1742 /* write through page cache? */ 1743 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1744 simple_lock(&vp->v_interlock); 1745 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1746 round_page(uio->uio_offset), PGO_CLEANIT); 1747 } 1748 1749 puffs_updatenode(vp, uflags); 1750 } else { 1751 /* tomove is non-increasing */ 1752 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1753 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1754 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1755 1756 while (uio->uio_resid > 0) { 1757 /* move data to buffer */ 1758 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1759 RWARGS(write_argp, ap->a_ioflag, tomove, 1760 uio->uio_offset, ap->a_cred); 1761 error = uiomove(write_argp->pvnr_data, tomove, uio); 1762 if (error) 1763 break; 1764 1765 /* move buffer to userspace */ 1766 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1767 PUFFS_VN_WRITE, write_argp, argsize, 0, 1768 ap->a_vp, NULL); 1769 if (error) 1770 break; 1771 1772 if (write_argp->pvnr_resid > tomove) { 1773 puffs_errnotify(pmp, PUFFS_ERR_WRITE, 1774 E2BIG, VPTOPNC(ap->a_vp)); 1775 error = EPROTO; 1776 break; 1777 } 1778 1779 /* adjust file size */ 1780 if (vp->v_size < uio->uio_offset) 1781 uvm_vnp_setsize(vp, uio->uio_offset); 1782 1783 /* didn't move everything? bad userspace. bail */ 1784 if (write_argp->pvnr_resid != 0) { 1785 error = EIO; 1786 break; 1787 } 1788 } 1789 } 1790 1791 if (write_argp) 1792 free(write_argp, M_PUFFS); 1793 return error; 1794 } 1795 1796 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1797 1798 #define FCNIOCTL_ARG_MAX 1<<16 1799 int 1800 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1801 { 1802 1803 /* currently not supported */ 1804 return EOPNOTSUPP; 1805 #if 0 1806 /* struct vop_ioctl_args { 1807 const struct vnodeop_desc *a_desc; 1808 struct vnode *a_vp; 1809 u_long a_command; 1810 void *a_data; 1811 int a_fflag; 1812 kauth_cred_t a_cred; 1813 struct lwp *a_l; 1814 }*ap = v; */ 1815 struct puffs_mount *pmp; 1816 struct puffs_sizepark pspark; 1817 void *kernbuf; 1818 size_t copylen; 1819 int error; 1820 1821 PUFFS_VNREQ(fcnioctl); 1822 1823 /* 1824 * Since this op gives the filesystem (almost) complete control on 1825 * how much it is allowed to copy from the calling process 1826 * address space, do not enable it by default, since it would 1827 * be a whopping security hole. 1828 */ 1829 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1830 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1831 return EINVAL; /* only shoe that fits */ 1832 1833 /* fill in sizereq and store it */ 1834 pspark.pkso_reqid = puffs_getreqid(pmp); 1835 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1836 pspark.pkso_copybuf = ap->a_data; 1837 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1838 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1839 1840 /* then fill in actual request and shoot it off */ 1841 fcnioctl_arg.pvnr_command = ap->a_command; 1842 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1843 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1844 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1845 1846 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1847 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1848 pspark.pkso_reqid, ap->a_vp, NULL); 1849 1850 /* if we don't need to copy data, we're done */ 1851 if (error || !fcnioctl_arg.pvnr_copyback) 1852 return error; 1853 1854 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1855 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1856 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1857 if (error) 1858 goto out; 1859 error = copyout(kernbuf, ap->a_data, copylen); 1860 1861 out: 1862 free(kernbuf, M_PUFFS); 1863 return error; 1864 #endif 1865 } 1866 1867 int 1868 puffs_ioctl(void *v) 1869 { 1870 1871 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1872 } 1873 1874 int 1875 puffs_fcntl(void *v) 1876 { 1877 1878 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1879 } 1880 1881 int 1882 puffs_print(void *v) 1883 { 1884 struct vop_print_args /* { 1885 struct vnode *a_vp; 1886 } */ *ap = v; 1887 struct puffs_mount *pmp; 1888 struct vnode *vp = ap->a_vp; 1889 struct puffs_node *pn = vp->v_data; 1890 1891 PUFFS_VNREQ(print); 1892 1893 pmp = MPTOPUFFSMP(vp->v_mount); 1894 1895 /* kernel portion */ 1896 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1897 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1898 if (vp->v_type == VFIFO) 1899 fifo_printinfo(vp); 1900 lockmgr_printinfo(&vp->v_lock); 1901 1902 /* userspace portion */ 1903 if (EXISTSOP(pmp, PRINT)) 1904 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1905 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1906 1907 return 0; 1908 } 1909 1910 int 1911 puffs_pathconf(void *v) 1912 { 1913 struct vop_pathconf_args /* { 1914 const struct vnodeop_desc *a_desc; 1915 struct vnode *a_vp; 1916 int a_name; 1917 register_t *a_retval; 1918 } */ *ap = v; 1919 int error; 1920 1921 PUFFS_VNREQ(pathconf); 1922 1923 pathconf_arg.pvnr_name = ap->a_name; 1924 1925 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1926 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1927 ap->a_vp, NULL); 1928 if (error) 1929 return error; 1930 1931 *ap->a_retval = pathconf_arg.pvnr_retval; 1932 1933 return 0; 1934 } 1935 1936 int 1937 puffs_advlock(void *v) 1938 { 1939 struct vop_advlock_args /* { 1940 const struct vnodeop_desc *a_desc; 1941 struct vnode *a_vp; 1942 void *a_id; 1943 int a_op; 1944 struct flock *a_fl; 1945 int a_flags; 1946 } */ *ap = v; 1947 int error; 1948 1949 PUFFS_VNREQ(advlock); 1950 1951 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1952 if (error) 1953 return error; 1954 advlock_arg.pvnr_id = ap->a_id; 1955 advlock_arg.pvnr_op = ap->a_op; 1956 advlock_arg.pvnr_flags = ap->a_flags; 1957 1958 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1959 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1960 } 1961 1962 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 1963 #define BIOREAD(bp) (bp->b_flags & B_READ) 1964 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 1965 1966 /* 1967 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1968 */ 1969 int 1970 puffs_strategy(void *v) 1971 { 1972 struct vop_strategy_args /* { 1973 const struct vnodeop_desc *a_desc; 1974 struct vnode *a_vp; 1975 struct buf *a_bp; 1976 } */ *ap = v; 1977 struct puffs_mount *pmp; 1978 struct vnode *vp = ap->a_vp; 1979 struct puffs_node *pn; 1980 struct puffs_vnreq_readwrite *rw_argp = NULL; 1981 struct buf *bp; 1982 size_t argsize; 1983 size_t tomove, moved; 1984 int error, dofaf; 1985 1986 pmp = MPTOPUFFSMP(vp->v_mount); 1987 bp = ap->a_bp; 1988 error = 0; 1989 dofaf = 0; 1990 pn = VPTOPP(vp); 1991 1992 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 1993 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 1994 ERROUT(EOPNOTSUPP); 1995 1996 /* 1997 * Short-circuit optimization: don't flush buffer in between 1998 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1999 */ 2000 if (pn->pn_stat & PNODE_DYING) { 2001 KASSERT(BIOWRITE(bp)); 2002 bp->b_resid = 0; 2003 goto out; 2004 } 2005 2006 #ifdef DIAGNOSTIC 2007 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 2008 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2009 bp->b_bcount); 2010 #endif 2011 2012 /* 2013 * See explanation for the necessity of a FAF in puffs_fsync. 2014 * 2015 * Also, do FAF in case we're suspending. 2016 * See puffs_vfsops.c:pageflush() 2017 */ 2018 if (BIOWRITE(bp)) { 2019 simple_lock(&vp->v_interlock); 2020 if (vp->v_flag & VXLOCK) 2021 dofaf = 1; 2022 if (pn->pn_stat & PNODE_SUSPEND) 2023 dofaf = 1; 2024 simple_unlock(&vp->v_interlock); 2025 } 2026 2027 if (BIOASYNC(bp)) 2028 dofaf = 1; 2029 2030 #ifdef DIAGNOSTIC 2031 if (curlwp == uvm.pagedaemon_lwp) 2032 KASSERT(dofaf); 2033 #endif 2034 2035 /* allocate transport structure */ 2036 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2037 argsize = sizeof(struct puffs_vnreq_readwrite); 2038 rw_argp = malloc(argsize + tomove, M_PUFFS, 2039 M_ZERO | (dofaf ? M_NOWAIT : M_WAITOK)); 2040 if (rw_argp == NULL) 2041 ERROUT(ENOMEM); 2042 RWARGS(rw_argp, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2043 2044 /* 2x2 cases: read/write, faf/nofaf */ 2045 if (BIOREAD(bp)) { 2046 if (dofaf) { 2047 puffs_vntouser_call(pmp, PUFFS_VN_READ, rw_argp, 2048 argsize, tomove, puffs_parkdone_asyncbioread, 2049 bp, vp, NULL); 2050 } else { 2051 error = puffs_vntouser(pmp, PUFFS_VN_READ, 2052 rw_argp, argsize, tomove, vp, NULL); 2053 if (error) 2054 goto out; 2055 2056 if (rw_argp->pvnr_resid > tomove) { 2057 puffs_errnotify(pmp, PUFFS_ERR_READ, 2058 E2BIG, VPTOPNC(vp)); 2059 ERROUT(EPROTO); 2060 } 2061 2062 moved = tomove - rw_argp->pvnr_resid; 2063 2064 (void)memcpy(bp->b_data, rw_argp->pvnr_data, moved); 2065 bp->b_resid = bp->b_bcount - moved; 2066 } 2067 } else { 2068 /* 2069 * make pages read-only before we write them if we want 2070 * write caching info 2071 */ 2072 if (PUFFS_WCACHEINFO(pmp)) { 2073 struct uvm_object *uobj = &vp->v_uobj; 2074 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2075 struct vm_page *vmp; 2076 int i; 2077 2078 for (i = 0; i < npages; i++) { 2079 vmp= uvm_pageratop((vaddr_t)bp->b_data 2080 + (i << PAGE_SHIFT)); 2081 DPRINTF(("puffs_strategy: write-protecting " 2082 "vp %p page %p, offset %" PRId64"\n", 2083 vp, vmp, vmp->offset)); 2084 simple_lock(&uobj->vmobjlock); 2085 vmp->flags |= PG_RDONLY; 2086 pmap_page_protect(vmp, VM_PROT_READ); 2087 simple_unlock(&uobj->vmobjlock); 2088 } 2089 } 2090 2091 (void)memcpy(&rw_argp->pvnr_data, bp->b_data, tomove); 2092 if (dofaf) { 2093 /* 2094 * assume FAF moves everything. frankly, we don't 2095 * really have a choice. 2096 */ 2097 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2098 PUFFS_VN_WRITE, rw_argp, argsize + tomove, vp); 2099 bp->b_resid = bp->b_bcount - tomove; 2100 } else { 2101 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2102 PUFFS_VN_WRITE, rw_argp, argsize + tomove, 2103 0, vp, NULL); 2104 if (error) 2105 goto out; 2106 2107 moved = tomove - rw_argp->pvnr_resid; 2108 if (rw_argp->pvnr_resid > tomove) { 2109 puffs_errnotify(pmp, PUFFS_ERR_WRITE, 2110 E2BIG, VPTOPNC(vp)); 2111 ERROUT(EPROTO); 2112 } 2113 2114 bp->b_resid = bp->b_bcount - moved; 2115 if (rw_argp->pvnr_resid != 0) { 2116 ERROUT(EIO); 2117 } 2118 } 2119 } 2120 2121 out: 2122 KASSERT(dofaf == 0 || error == 0 || rw_argp == NULL); 2123 if (rw_argp && !dofaf) 2124 free(rw_argp, M_PUFFS); 2125 2126 if (error) 2127 bp->b_error = error; 2128 2129 if (error || !(BIOREAD(bp) && BIOASYNC(bp))) 2130 biodone(bp); 2131 2132 return error; 2133 } 2134 2135 int 2136 puffs_mmap(void *v) 2137 { 2138 struct vop_mmap_args /* { 2139 const struct vnodeop_desc *a_desc; 2140 struct vnode *a_vp; 2141 vm_prot_t a_prot; 2142 kauth_cred_t a_cred; 2143 struct lwp *a_l; 2144 } */ *ap = v; 2145 struct puffs_mount *pmp; 2146 int error; 2147 2148 PUFFS_VNREQ(mmap); 2149 2150 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2151 2152 if (!PUFFS_USE_PAGECACHE(pmp)) 2153 return genfs_eopnotsupp(v); 2154 2155 if (EXISTSOP(pmp, MMAP)) { 2156 mmap_arg.pvnr_prot = ap->a_prot; 2157 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2158 puffs_cidcvt(&mmap_arg.pvnr_cid, ap->a_l); 2159 2160 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2161 &mmap_arg, sizeof(mmap_arg), 0, 2162 ap->a_vp, NULL); 2163 } else { 2164 error = genfs_mmap(v); 2165 } 2166 2167 return error; 2168 } 2169 2170 2171 /* 2172 * The rest don't get a free trip to userspace and back, they 2173 * have to stay within the kernel. 2174 */ 2175 2176 /* 2177 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2178 * well, maybe somehow, somewhere, some day .... 2179 */ 2180 int 2181 puffs_bmap(void *v) 2182 { 2183 struct vop_bmap_args /* { 2184 const struct vnodeop_desc *a_desc; 2185 struct vnode *a_vp; 2186 daddr_t a_bn; 2187 struct vnode **a_vpp; 2188 daddr_t *a_bnp; 2189 int *a_runp; 2190 } */ *ap = v; 2191 struct puffs_mount *pmp; 2192 2193 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2194 2195 if (ap->a_vpp) 2196 *ap->a_vpp = ap->a_vp; 2197 if (ap->a_bnp) 2198 *ap->a_bnp = ap->a_bn; 2199 if (ap->a_runp) 2200 *ap->a_runp 2201 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2202 2203 return 0; 2204 } 2205 2206 /* 2207 * Handle getpages faults in puffs. We let genfs_getpages() do most 2208 * of the dirty work, but we come in this route to do accounting tasks. 2209 * If the user server has specified functions for cache notifications 2210 * about reads and/or writes, we record which type of operation we got, 2211 * for which page range, and proceed to issue a FAF notification to the 2212 * server about it. 2213 */ 2214 int 2215 puffs_getpages(void *v) 2216 { 2217 struct vop_getpages_args /* { 2218 const struct vnodeop_desc *a_desc; 2219 struct vnode *a_vp; 2220 voff_t a_offset; 2221 struct vm_page **a_m; 2222 int *a_count; 2223 int a_centeridx; 2224 vm_prot_t a_access_type; 2225 int a_advice; 2226 int a_flags; 2227 } */ *ap = v; 2228 struct puffs_mount *pmp; 2229 struct puffs_node *pn; 2230 struct vnode *vp; 2231 struct vm_page **pgs; 2232 struct puffs_cacheinfo *pcinfo = NULL; 2233 struct puffs_cacherun *pcrun; 2234 void *parkmem = NULL; 2235 size_t runsizes; 2236 int i, npages, si, streakon; 2237 int error, locked, write; 2238 2239 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2240 npages = *ap->a_count; 2241 pgs = ap->a_m; 2242 vp = ap->a_vp; 2243 pn = vp->v_data; 2244 locked = (ap->a_flags & PGO_LOCKED) != 0; 2245 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2246 2247 /* ccg xnaht - gets Wuninitialized wrong */ 2248 pcrun = NULL; 2249 runsizes = 0; 2250 2251 /* 2252 * Check that we aren't trying to fault in pages which our file 2253 * server doesn't know about. This happens if we extend a file by 2254 * skipping some pages and later try to fault in pages which 2255 * are between pn_serversize and vp_size. This check optimizes 2256 * away the common case where a file is being extended. 2257 */ 2258 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2259 struct vattr va; 2260 2261 /* try again later when we can block */ 2262 if (locked) 2263 ERROUT(EBUSY); 2264 2265 simple_unlock(&vp->v_interlock); 2266 vattr_null(&va); 2267 va.va_size = vp->v_size; 2268 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2269 if (error) 2270 ERROUT(error); 2271 simple_lock(&vp->v_interlock); 2272 } 2273 2274 if (write && PUFFS_WCACHEINFO(pmp)) { 2275 /* allocate worst-case memory */ 2276 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2277 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2278 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2279 2280 /* 2281 * can't block if we're locked and can't mess up caching 2282 * information for fs server. so come back later, please 2283 */ 2284 if (pcinfo == NULL) 2285 ERROUT(ENOMEM); 2286 2287 parkmem = puffs_park_alloc(locked == 0); 2288 if (parkmem == NULL) 2289 ERROUT(ENOMEM); 2290 2291 pcrun = pcinfo->pcache_runs; 2292 } 2293 2294 error = genfs_getpages(v); 2295 if (error) 2296 goto out; 2297 2298 if (PUFFS_WCACHEINFO(pmp) == 0) 2299 goto out; 2300 2301 /* 2302 * Let's see whose fault it was and inform the user server of 2303 * possibly read/written pages. Map pages from read faults 2304 * strictly read-only, since otherwise we might miss info on 2305 * when the page is actually write-faulted to. 2306 */ 2307 if (!locked) 2308 simple_lock(&vp->v_uobj.vmobjlock); 2309 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2310 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2311 if (streakon && write) { 2312 streakon = 0; 2313 pcrun[si].pcache_runend 2314 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2315 si++; 2316 } 2317 continue; 2318 } 2319 if (streakon == 0 && write) { 2320 streakon = 1; 2321 pcrun[si].pcache_runstart = pgs[i]->offset; 2322 } 2323 2324 if (!write) 2325 pgs[i]->flags |= PG_RDONLY; 2326 } 2327 /* was the last page part of our streak? */ 2328 if (streakon) { 2329 pcrun[si].pcache_runend 2330 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2331 si++; 2332 } 2333 if (!locked) 2334 simple_unlock(&vp->v_uobj.vmobjlock); 2335 2336 KASSERT(si <= (npages / 2) + 1); 2337 2338 /* send results to userspace */ 2339 if (write) 2340 puffs_cacheop(pmp, parkmem, pcinfo, 2341 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2342 2343 out: 2344 if (error) { 2345 if (pcinfo != NULL) 2346 free(pcinfo, M_PUFFS); 2347 if (parkmem != NULL) 2348 puffs_park_release(parkmem, 1); 2349 } 2350 2351 return error; 2352 } 2353 2354 int 2355 puffs_lock(void *v) 2356 { 2357 struct vop_lock_args /* { 2358 struct vnode *a_vp; 2359 int a_flags; 2360 }*/ *ap = v; 2361 struct vnode *vp = ap->a_vp; 2362 struct mount *mp = vp->v_mount; 2363 2364 #if 0 2365 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2366 #endif 2367 2368 /* 2369 * XXX: this avoids deadlocking when we're suspending. 2370 * e.g. some ops holding the vnode lock might be blocked for 2371 * the vfs transaction lock so we'd deadlock. 2372 * 2373 * Now once again this is skating on the thin ice of modern life, 2374 * since we are breaking the consistency guarantee provided 2375 * _to the user server_ by vnode locking. Hopefully this will 2376 * get fixed soon enough by getting rid of the dependency on 2377 * vnode locks alltogether. 2378 */ 2379 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2380 if (ap->a_flags & LK_INTERLOCK) 2381 simple_unlock(&vp->v_interlock); 2382 return 0; 2383 } 2384 2385 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2386 } 2387 2388 int 2389 puffs_unlock(void *v) 2390 { 2391 struct vop_unlock_args /* { 2392 struct vnode *a_vp; 2393 int a_flags; 2394 } */ *ap = v; 2395 struct vnode *vp = ap->a_vp; 2396 struct mount *mp = vp->v_mount; 2397 2398 #if 0 2399 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2400 #endif 2401 2402 /* XXX: see puffs_lock() */ 2403 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2404 if (ap->a_flags & LK_INTERLOCK) 2405 simple_unlock(&vp->v_interlock); 2406 return 0; 2407 } 2408 2409 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2410 } 2411 2412 int 2413 puffs_islocked(void *v) 2414 { 2415 struct vop_islocked_args *ap = v; 2416 int rv; 2417 2418 rv = lockstatus(&ap->a_vp->v_lock); 2419 return rv; 2420 } 2421 2422 int 2423 puffs_generic(void *v) 2424 { 2425 struct vop_generic_args *ap = v; 2426 2427 (void)ap; 2428 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2429 2430 return EOPNOTSUPP; 2431 } 2432 2433 2434 /* 2435 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2436 * FAF update information for the puffs node first. 2437 */ 2438 int 2439 puffs_spec_read(void *v) 2440 { 2441 struct vop_read_args /* { 2442 const struct vnodeop_desc *a_desc; 2443 struct vnode *a_vp; 2444 struct uio *a_uio; 2445 int a_ioflag; 2446 kauth_cred_t a_cred; 2447 } */ *ap = v; 2448 2449 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2450 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2451 } 2452 2453 int 2454 puffs_spec_write(void *v) 2455 { 2456 struct vop_write_args /* { 2457 const struct vnodeop_desc *a_desc; 2458 struct vnode *a_vp; 2459 struct uio *a_uio; 2460 int a_ioflag; 2461 kauth_cred_t a_cred; 2462 }*/ *ap = v; 2463 2464 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2465 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2466 } 2467 2468 int 2469 puffs_fifo_read(void *v) 2470 { 2471 struct vop_read_args /* { 2472 const struct vnodeop_desc *a_desc; 2473 struct vnode *a_vp; 2474 struct uio *a_uio; 2475 int a_ioflag; 2476 kauth_cred_t a_cred; 2477 } */ *ap = v; 2478 2479 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2480 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2481 } 2482 2483 int 2484 puffs_fifo_write(void *v) 2485 { 2486 struct vop_write_args /* { 2487 const struct vnodeop_desc *a_desc; 2488 struct vnode *a_vp; 2489 struct uio *a_uio; 2490 int a_ioflag; 2491 kauth_cred_t a_cred; 2492 }*/ *ap = v; 2493 2494 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2495 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2496 } 2497
Indexes created Tue Sep 30 20:09:53 GMT 2025