puffs_vnops.c revision 1.99
1 /* $NetBSD: puffs_vnops.c,v 1.99 2007/09/27 14:35:15 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 1.99 2007/09/27 14:35:15 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 error = EINVAL; 510 goto out; 511 } 512 513 error = puffs_cookie2vnode(pmp, lookup_arg.pvnr_newnode, 1, 1, &vp); 514 if (error) { 515 error = puffs_getvnode(dvp->v_mount, 516 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 517 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 518 if (error) { 519 goto out; 520 } 521 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 522 } 523 *ap->a_vpp = vp; 524 525 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 526 cache_enter(dvp, vp, cnp); 527 528 /* XXX */ 529 if ((lookup_arg.pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 530 cnp->cn_flags &= ~REQUIREDIR; 531 if (lookup_arg.pvnr_cn.pkcn_consume) 532 cnp->cn_consume = MIN(lookup_arg.pvnr_cn.pkcn_consume, 533 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 534 535 out: 536 if (cnp->cn_flags & ISDOTDOT) 537 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 538 539 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 540 return error; 541 } 542 543 int 544 puffs_create(void *v) 545 { 546 struct vop_create_args /* { 547 const struct vnodeop_desc *a_desc; 548 struct vnode *a_dvp; 549 struct vnode **a_vpp; 550 struct componentname *a_cnp; 551 struct vattr *a_vap; 552 } */ *ap = v; 553 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 554 int error; 555 556 PUFFS_VNREQ(create); 557 558 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 559 ap->a_dvp, ap->a_cnp->cn_nameptr)); 560 561 puffs_makecn(&create_arg.pvnr_cn, &create_arg.pvnr_cn_cred, 562 &create_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 563 create_arg.pvnr_va = *ap->a_vap; 564 565 error = puffs_vntouser(pmp, PUFFS_VN_CREATE, 566 &create_arg, sizeof(create_arg), 0, ap->a_dvp, NULL); 567 if (error) 568 goto out; 569 570 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 571 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 572 /* XXX: in case of error, need to uncommit userspace transaction */ 573 574 out: 575 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 576 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 577 vput(ap->a_dvp); 578 579 DPRINTF(("puffs_create: return %d\n", error)); 580 return error; 581 } 582 583 int 584 puffs_mknod(void *v) 585 { 586 struct vop_mknod_args /* { 587 const struct vnodeop_desc *a_desc; 588 struct vnode *a_dvp; 589 struct vnode **a_vpp; 590 struct componentname *a_cnp; 591 struct vattr *a_vap; 592 } */ *ap = v; 593 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 594 int error; 595 596 PUFFS_VNREQ(mknod); 597 598 puffs_makecn(&mknod_arg.pvnr_cn, &mknod_arg.pvnr_cn_cred, 599 &mknod_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 600 mknod_arg.pvnr_va = *ap->a_vap; 601 602 error = puffs_vntouser(pmp, PUFFS_VN_MKNOD, 603 &mknod_arg, sizeof(mknod_arg), 0, ap->a_dvp, NULL); 604 if (error) 605 goto out; 606 607 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 608 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 609 ap->a_vap->va_rdev); 610 611 out: 612 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 613 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 614 vput(ap->a_dvp); 615 return error; 616 } 617 618 int 619 puffs_open(void *v) 620 { 621 struct vop_open_args /* { 622 const struct vnodeop_desc *a_desc; 623 struct vnode *a_vp; 624 int a_mode; 625 kauth_cred_t a_cred; 626 struct lwp *a_l; 627 } */ *ap = v; 628 struct vnode *vp = ap->a_vp; 629 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 630 int mode = ap->a_mode; 631 int error; 632 633 PUFFS_VNREQ(open); 634 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 635 636 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 637 ERROUT(EROFS); 638 639 if (!EXISTSOP(pmp, OPEN)) 640 ERROUT(0); 641 642 open_arg.pvnr_mode = mode; 643 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 644 puffs_cidcvt(&open_arg.pvnr_cid, ap->a_l); 645 646 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 647 &open_arg, sizeof(open_arg), 0, vp, NULL); 648 649 out: 650 DPRINTF(("puffs_open: returning %d\n", error)); 651 return error; 652 } 653 654 int 655 puffs_close(void *v) 656 { 657 struct vop_close_args /* { 658 const struct vnodeop_desc *a_desc; 659 struct vnode *a_vp; 660 int a_fflag; 661 kauth_cred_t a_cred; 662 struct lwp *a_l; 663 } */ *ap = v; 664 struct puffs_vnreq_close *close_argp; 665 666 close_argp = malloc(sizeof(struct puffs_vnreq_close), 667 M_PUFFS, M_WAITOK | M_ZERO); 668 close_argp->pvnr_fflag = ap->a_fflag; 669 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 670 puffs_cidcvt(&close_argp->pvnr_cid, ap->a_l); 671 672 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 673 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 674 675 return 0; 676 } 677 678 int 679 puffs_access(void *v) 680 { 681 struct vop_access_args /* { 682 const struct vnodeop_desc *a_desc; 683 struct vnode *a_vp; 684 int a_mode; 685 kauth_cred_t a_cred; 686 struct lwp *a_l; 687 } */ *ap = v; 688 struct vnode *vp = ap->a_vp; 689 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 690 int mode = ap->a_mode; 691 692 PUFFS_VNREQ(access); 693 694 if (mode & VWRITE) { 695 switch (vp->v_type) { 696 case VDIR: 697 case VLNK: 698 case VREG: 699 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 700 || !EXISTSOP(pmp, WRITE)) 701 return EROFS; 702 break; 703 default: 704 break; 705 } 706 } 707 708 if (!EXISTSOP(pmp, ACCESS)) 709 return 0; 710 711 access_arg.pvnr_mode = ap->a_mode; 712 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 713 puffs_cidcvt(&access_arg.pvnr_cid, ap->a_l); 714 715 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 716 &access_arg, sizeof(access_arg), 0, vp, NULL); 717 } 718 719 int 720 puffs_getattr(void *v) 721 { 722 struct vop_getattr_args /* { 723 const struct vnodeop_desc *a_desc; 724 struct vnode *a_vp; 725 struct vattr *a_vap; 726 kauth_cred_t a_cred; 727 struct lwp *a_l; 728 } */ *ap = v; 729 struct mount *mp; 730 struct vnode *vp; 731 struct vattr *vap, *rvap; 732 struct puffs_node *pn; 733 int error; 734 735 PUFFS_VNREQ(getattr); 736 737 vp = ap->a_vp; 738 mp = vp->v_mount; 739 vap = ap->a_vap; 740 741 vattr_null(&getattr_arg.pvnr_va); 742 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 743 puffs_cidcvt(&getattr_arg.pvnr_cid, ap->a_l); 744 745 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 746 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 747 if (error) 748 return error; 749 750 rvap = &getattr_arg.pvnr_va; 751 /* 752 * Don't listen to the file server regarding special device 753 * size info, the file server doesn't know anything about them. 754 */ 755 if (vp->v_type == VBLK || vp->v_type == VCHR) 756 rvap->va_size = vp->v_size; 757 758 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 759 if (vp->v_type == VBLK) 760 rvap->va_blocksize = BLKDEV_IOSIZE; 761 else if (vp->v_type == VCHR) 762 rvap->va_blocksize = MAXBSIZE; 763 764 (void) memcpy(vap, rvap, sizeof(struct vattr)); 765 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 766 767 pn = VPTOPP(vp); 768 if (pn->pn_stat & PNODE_METACACHE_ATIME) 769 vap->va_atime = pn->pn_mc_atime; 770 if (pn->pn_stat & PNODE_METACACHE_CTIME) 771 vap->va_ctime = pn->pn_mc_ctime; 772 if (pn->pn_stat & PNODE_METACACHE_MTIME) 773 vap->va_mtime = pn->pn_mc_mtime; 774 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 775 vap->va_size = pn->pn_mc_size; 776 } else { 777 if (rvap->va_size != VNOVAL 778 && vp->v_type != VBLK && vp->v_type != VCHR) { 779 uvm_vnp_setsize(vp, rvap->va_size); 780 pn->pn_serversize = rvap->va_size; 781 } 782 } 783 784 return 0; 785 } 786 787 static int 788 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 789 struct lwp *l, int chsize) 790 { 791 struct puffs_node *pn = vp->v_data; 792 int error; 793 794 PUFFS_VNREQ(setattr); 795 796 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 797 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 798 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 799 || vap->va_mode != (mode_t)VNOVAL)) 800 return EROFS; 801 802 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 803 && vp->v_type == VREG && vap->va_size != VNOVAL) 804 return EROFS; 805 806 /* 807 * Flush metacache first. If we are called with some explicit 808 * parameters, treat them as information overriding metacache 809 * information. 810 */ 811 if (pn->pn_stat & PNODE_METACACHE_MASK) { 812 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 813 && vap->va_atime.tv_sec == VNOVAL) 814 vap->va_atime = pn->pn_mc_atime; 815 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 816 && vap->va_ctime.tv_sec == VNOVAL) 817 vap->va_ctime = pn->pn_mc_ctime; 818 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 819 && vap->va_mtime.tv_sec == VNOVAL) 820 vap->va_mtime = pn->pn_mc_mtime; 821 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 822 && vap->va_size == VNOVAL) 823 vap->va_size = pn->pn_mc_size; 824 825 pn->pn_stat &= ~PNODE_METACACHE_MASK; 826 } 827 828 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 829 puffs_credcvt(&setattr_arg.pvnr_cred, cred); 830 puffs_cidcvt(&setattr_arg.pvnr_cid, l); 831 832 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_SETATTR, 833 &setattr_arg, sizeof(setattr_arg), 0, vp, NULL); 834 if (error) 835 return error; 836 837 if (vap->va_size != VNOVAL) { 838 pn->pn_serversize = vap->va_size; 839 if (chsize) 840 uvm_vnp_setsize(vp, vap->va_size); 841 } 842 843 return 0; 844 } 845 846 int 847 puffs_setattr(void *v) 848 { 849 struct vop_getattr_args /* { 850 const struct vnodeop_desc *a_desc; 851 struct vnode *a_vp; 852 struct vattr *a_vap; 853 kauth_cred_t a_cred; 854 struct lwp *a_l; 855 } */ *ap = v; 856 857 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 858 } 859 860 int 861 puffs_inactive(void *v) 862 { 863 struct vop_inactive_args /* { 864 const struct vnodeop_desc *a_desc; 865 struct vnode *a_vp; 866 struct lwp *a_l; 867 } */ *ap = v; 868 struct puffs_mount *pmp; 869 struct puffs_node *pnode; 870 int rv, call; 871 872 PUFFS_VNREQ(inactive); 873 874 /* 875 * XXX: think about this after we really start unlocking 876 * when going to userspace 877 */ 878 pnode = ap->a_vp->v_data; 879 880 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 881 882 puffs_cidcvt(&inactive_arg.pvnr_cid, ap->a_l); 883 884 if (EXISTSOP(pmp, INACTIVE)) 885 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 886 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 887 call = 1; 888 else 889 call = 0; 890 else 891 call = 1; 892 else 893 call = 0; 894 895 if (call) 896 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 897 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 898 else 899 rv = 1; /* see below */ 900 pnode->pn_stat &= ~PNODE_DOINACT; 901 902 VOP_UNLOCK(ap->a_vp, 0); 903 904 /* 905 * file server thinks it's gone? then don't be afraid care, 906 * node's life was already all it would ever be 907 */ 908 if (pnode->pn_stat & PNODE_NOREFS) { 909 pnode->pn_stat |= PNODE_DYING; 910 vrecycle(ap->a_vp, NULL, ap->a_l); 911 } 912 913 return 0; 914 } 915 916 /* 917 * always FAF, we don't really care if the server wants to fail to 918 * reclaim the node or not 919 */ 920 int 921 puffs_reclaim(void *v) 922 { 923 struct vop_reclaim_args /* { 924 const struct vnodeop_desc *a_desc; 925 struct vnode *a_vp; 926 struct lwp *a_l; 927 } */ *ap = v; 928 struct puffs_mount *pmp; 929 struct puffs_vnreq_reclaim *reclaim_argp; 930 931 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 932 933 /* 934 * first things first: check if someone is trying to reclaim the 935 * root vnode. do not allow that to travel to userspace. 936 * Note that we don't need to take the lock similarly to 937 * puffs_root(), since there is only one of us. 938 */ 939 if (ap->a_vp->v_flag & VROOT) { 940 mutex_enter(&pmp->pmp_lock); 941 KASSERT(pmp->pmp_root != NULL); 942 pmp->pmp_root = NULL; 943 mutex_exit(&pmp->pmp_lock); 944 goto out; 945 } 946 947 if (!EXISTSOP(pmp, RECLAIM)) 948 goto out; 949 950 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 951 M_PUFFS, M_WAITOK | M_ZERO); 952 puffs_cidcvt(&reclaim_argp->pvnr_cid, ap->a_l); 953 954 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 955 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 956 957 out: 958 if (PUFFS_USE_NAMECACHE(pmp)) 959 cache_purge(ap->a_vp); 960 puffs_putvnode(ap->a_vp); 961 962 return 0; 963 } 964 965 #define CSIZE sizeof(**ap->a_cookies) 966 int 967 puffs_readdir(void *v) 968 { 969 struct vop_readdir_args /* { 970 const struct vnodeop_desc *a_desc; 971 struct vnode *a_vp; 972 struct uio *a_uio; 973 kauth_cred_t a_cred; 974 int *a_eofflag; 975 off_t **a_cookies; 976 int *a_ncookies; 977 } */ *ap = v; 978 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 979 struct puffs_vnreq_readdir *readdir_argp; 980 size_t argsize, tomove, cookiemem, cookiesmax; 981 struct uio *uio = ap->a_uio; 982 size_t howmuch, resid; 983 int error; 984 985 /* 986 * ok, so we need: resid + cookiemem = maxreq 987 * => resid + cookiesize * (resid/minsize) = maxreq 988 * => resid + cookiesize/minsize * resid = maxreq 989 * => (cookiesize/minsize + 1) * resid = maxreq 990 * => resid = maxreq / (cookiesize/minsize + 1) 991 * 992 * Since cookiesize <= minsize and we're not very big on floats, 993 * we approximate that to be 1. Therefore: 994 * 995 * resid = maxreq / 2; 996 * 997 * Well, at least we didn't have to use differential equations 998 * or the Gram-Schmidt process. 999 * 1000 * (yes, I'm very afraid of this) 1001 */ 1002 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1003 1004 if (ap->a_cookies) { 1005 KASSERT(ap->a_ncookies != NULL); 1006 if (pmp->pmp_args.pa_fhsize == 0) 1007 return EOPNOTSUPP; 1008 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1009 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1010 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1011 } else { 1012 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1013 cookiesmax = 0; 1014 cookiemem = 0; 1015 } 1016 1017 argsize = sizeof(struct puffs_vnreq_readdir); 1018 tomove = resid + cookiemem; 1019 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 1020 1021 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 1022 readdir_argp->pvnr_offset = uio->uio_offset; 1023 readdir_argp->pvnr_resid = resid; 1024 readdir_argp->pvnr_ncookies = cookiesmax; 1025 readdir_argp->pvnr_eofflag = 0; 1026 readdir_argp->pvnr_dentoff = cookiemem; 1027 1028 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1029 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 1030 ap->a_vp, NULL); 1031 if (error) 1032 goto out; 1033 1034 /* userspace is cheating? */ 1035 if (readdir_argp->pvnr_resid > resid 1036 || readdir_argp->pvnr_ncookies > cookiesmax) 1037 ERROUT(EINVAL); 1038 1039 /* check eof */ 1040 if (readdir_argp->pvnr_eofflag) 1041 *ap->a_eofflag = 1; 1042 1043 /* bouncy-wouncy with the directory data */ 1044 howmuch = resid - readdir_argp->pvnr_resid; 1045 1046 /* force eof if no data was returned (getcwd() needs this) */ 1047 if (howmuch == 0) { 1048 *ap->a_eofflag = 1; 1049 goto out; 1050 } 1051 1052 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 1053 if (error) 1054 goto out; 1055 1056 /* provide cookies to caller if so desired */ 1057 if (ap->a_cookies) { 1058 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 1059 M_TEMP, M_WAITOK); 1060 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 1061 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 1062 *ap->a_ncookies*CSIZE); 1063 } 1064 1065 /* next readdir starts here */ 1066 uio->uio_offset = readdir_argp->pvnr_offset; 1067 1068 out: 1069 free(readdir_argp, M_PUFFS); 1070 return error; 1071 } 1072 #undef CSIZE 1073 1074 /* 1075 * poll works by consuming the bitmask in pn_revents. If there are 1076 * events available, poll returns immediately. If not, it issues a 1077 * poll to userspace, selrecords itself and returns with no available 1078 * events. When the file server returns, it executes puffs_parkdone_poll(), 1079 * where available events are added to the bitmask. selnotify() is 1080 * then also executed by that function causing us to enter here again 1081 * and hopefully find the missing bits (unless someone got them first, 1082 * in which case it starts all over again). 1083 */ 1084 int 1085 puffs_poll(void *v) 1086 { 1087 struct vop_poll_args /* { 1088 const struct vnodeop_desc *a_desc; 1089 struct vnode *a_vp; 1090 int a_events; 1091 struct lwp *a_l; 1092 }*/ *ap = v; 1093 struct vnode *vp = ap->a_vp; 1094 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1095 struct puffs_vnreq_poll *poll_argp; 1096 struct puffs_node *pn = vp->v_data; 1097 int events; 1098 1099 if (EXISTSOP(pmp, POLL)) { 1100 mutex_enter(&pn->pn_mtx); 1101 events = pn->pn_revents & ap->a_events; 1102 if (events & ap->a_events) { 1103 pn->pn_revents &= ~ap->a_events; 1104 mutex_exit(&pn->pn_mtx); 1105 1106 return events; 1107 } else { 1108 puffs_referencenode(pn); 1109 mutex_exit(&pn->pn_mtx); 1110 1111 /* freed in puffs_parkdone_poll */ 1112 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1113 M_PUFFS, M_ZERO | M_WAITOK); 1114 1115 poll_argp->pvnr_events = ap->a_events; 1116 puffs_cidcvt(&poll_argp->pvnr_cid, ap->a_l); 1117 1118 selrecord(ap->a_l, &pn->pn_sel); 1119 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1120 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1121 puffs_parkdone_poll, pn, 1122 vp, NULL); 1123 1124 return 0; 1125 } 1126 } else { 1127 return genfs_poll(v); 1128 } 1129 } 1130 1131 int 1132 puffs_fsync(void *v) 1133 { 1134 struct vop_fsync_args /* { 1135 const struct vnodeop_desc *a_desc; 1136 struct vnode *a_vp; 1137 kauth_cred_t a_cred; 1138 int a_flags; 1139 off_t a_offlo; 1140 off_t a_offhi; 1141 struct lwp *a_l; 1142 } */ *ap = v; 1143 struct vattr va; 1144 struct puffs_mount *pmp; 1145 struct puffs_vnreq_fsync *fsync_argp; 1146 struct vnode *vp; 1147 struct puffs_node *pn; 1148 int pflags, error, dofaf; 1149 1150 PUFFS_VNREQ(fsync); 1151 1152 vp = ap->a_vp; 1153 pn = VPTOPP(vp); 1154 pmp = MPTOPUFFSMP(vp->v_mount); 1155 1156 /* flush out information from our metacache, see vop_setattr */ 1157 if (pn->pn_stat & PNODE_METACACHE_MASK 1158 && (pn->pn_stat & PNODE_DYING) == 0) { 1159 vattr_null(&va); 1160 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1161 if (error) 1162 return error; 1163 } 1164 1165 /* 1166 * flush pages to avoid being overly dirty 1167 */ 1168 pflags = PGO_CLEANIT; 1169 if (ap->a_flags & FSYNC_WAIT) 1170 pflags |= PGO_SYNCIO; 1171 simple_lock(&vp->v_interlock); 1172 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1173 round_page(ap->a_offhi), pflags); 1174 if (error) 1175 return error; 1176 1177 /* 1178 * HELLO! We exit already here if the user server does not 1179 * support fsync OR if we should call fsync for a node which 1180 * has references neither in the kernel or the fs server. 1181 * Otherwise we continue to issue fsync() forward. 1182 */ 1183 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1184 return 0; 1185 1186 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1187 /* 1188 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1189 * only FAFs for those. Otherwise there's a danger of deadlock, 1190 * since the execution context here might be the user server 1191 * doing some operation on another fs, which in turn caused a 1192 * vnode to be reclaimed from the freelist for this fs. 1193 */ 1194 if (dofaf == 0) { 1195 simple_lock(&vp->v_interlock); 1196 if (vp->v_flag & VXLOCK) 1197 dofaf = 1; 1198 simple_unlock(&vp->v_interlock); 1199 } 1200 1201 if (dofaf == 0) { 1202 fsync_argp = &fsync_arg; 1203 } else { 1204 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1205 M_PUFFS, M_ZERO | M_NOWAIT); 1206 if (fsync_argp == NULL) 1207 return ENOMEM; 1208 } 1209 1210 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1211 fsync_argp->pvnr_flags = ap->a_flags; 1212 fsync_argp->pvnr_offlo = ap->a_offlo; 1213 fsync_argp->pvnr_offhi = ap->a_offhi; 1214 puffs_cidcvt(&fsync_argp->pvnr_cid, ap->a_l); 1215 1216 /* 1217 * XXX: see comment at puffs_getattr about locking 1218 * 1219 * If we are not required to wait, do a FAF operation. 1220 * Otherwise block here. 1221 */ 1222 if (dofaf == 0) { 1223 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1224 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1225 vp, NULL); 1226 } else { 1227 /* FAF is always "succesful" */ 1228 error = 0; 1229 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1230 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1231 } 1232 1233 return error; 1234 } 1235 1236 int 1237 puffs_seek(void *v) 1238 { 1239 struct vop_seek_args /* { 1240 const struct vnodeop_desc *a_desc; 1241 struct vnode *a_vp; 1242 off_t a_oldoff; 1243 off_t a_newoff; 1244 kauth_cred_t a_cred; 1245 } */ *ap = v; 1246 1247 PUFFS_VNREQ(seek); 1248 1249 seek_arg.pvnr_oldoff = ap->a_oldoff; 1250 seek_arg.pvnr_newoff = ap->a_newoff; 1251 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1252 1253 /* 1254 * XXX: seems like seek is called with an unlocked vp, but 1255 * it can't hurt to play safe 1256 */ 1257 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1258 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1259 } 1260 1261 int 1262 puffs_remove(void *v) 1263 { 1264 struct vop_remove_args /* { 1265 const struct vnodeop_desc *a_desc; 1266 struct vnode *a_dvp; 1267 struct vnode *a_vp; 1268 struct componentname *a_cnp; 1269 } */ *ap = v; 1270 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1271 int error; 1272 1273 PUFFS_VNREQ(remove); 1274 1275 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1276 puffs_makecn(&remove_arg.pvnr_cn, &remove_arg.pvnr_cn_cred, 1277 &remove_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1278 1279 error = puffs_vntouser(pmp, PUFFS_VN_REMOVE, 1280 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1281 1282 vput(ap->a_vp); 1283 if (ap->a_dvp == ap->a_vp) 1284 vrele(ap->a_dvp); 1285 else 1286 vput(ap->a_dvp); 1287 1288 return error; 1289 } 1290 1291 int 1292 puffs_mkdir(void *v) 1293 { 1294 struct vop_mkdir_args /* { 1295 const struct vnodeop_desc *a_desc; 1296 struct vnode *a_dvp; 1297 struct vnode **a_vpp; 1298 struct componentname *a_cnp; 1299 struct vattr *a_vap; 1300 } */ *ap = v; 1301 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1302 int error; 1303 1304 PUFFS_VNREQ(mkdir); 1305 1306 puffs_makecn(&mkdir_arg.pvnr_cn, &mkdir_arg.pvnr_cn_cred, 1307 &mkdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1308 mkdir_arg.pvnr_va = *ap->a_vap; 1309 1310 error = puffs_vntouser(pmp, PUFFS_VN_MKDIR, 1311 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1312 if (error) 1313 goto out; 1314 1315 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1316 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1317 1318 out: 1319 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1320 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1321 vput(ap->a_dvp); 1322 return error; 1323 } 1324 1325 int 1326 puffs_rmdir(void *v) 1327 { 1328 struct vop_rmdir_args /* { 1329 const struct vnodeop_desc *a_desc; 1330 struct vnode *a_dvp; 1331 struct vnode *a_vp; 1332 struct componentname *a_cnp; 1333 } */ *ap = v; 1334 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1335 int error; 1336 1337 PUFFS_VNREQ(rmdir); 1338 1339 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1340 puffs_makecn(&rmdir_arg.pvnr_cn, &rmdir_arg.pvnr_cn_cred, 1341 &rmdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1342 1343 error = puffs_vntouser(pmp, PUFFS_VN_RMDIR, 1344 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1345 1346 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1347 1348 vput(ap->a_dvp); 1349 vput(ap->a_vp); 1350 1351 return error; 1352 } 1353 1354 int 1355 puffs_link(void *v) 1356 { 1357 struct vop_link_args /* { 1358 const struct vnodeop_desc *a_desc; 1359 struct vnode *a_dvp; 1360 struct vnode *a_vp; 1361 struct componentname *a_cnp; 1362 }*/ *ap = v; 1363 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1364 int error; 1365 1366 PUFFS_VNREQ(link); 1367 1368 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1369 puffs_makecn(&link_arg.pvnr_cn, &link_arg.pvnr_cn_cred, 1370 &link_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1371 1372 error = puffs_vntouser(pmp, PUFFS_VN_LINK, 1373 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1374 1375 /* 1376 * XXX: stay in touch with the cache. I don't like this, but 1377 * don't have a better solution either. See also puffs_rename(). 1378 */ 1379 if (error == 0) 1380 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1381 1382 vput(ap->a_dvp); 1383 1384 return error; 1385 } 1386 1387 int 1388 puffs_symlink(void *v) 1389 { 1390 struct vop_symlink_args /* { 1391 const struct vnodeop_desc *a_desc; 1392 struct vnode *a_dvp; 1393 struct vnode **a_vpp; 1394 struct componentname *a_cnp; 1395 struct vattr *a_vap; 1396 char *a_target; 1397 }*/ *ap = v; 1398 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1399 struct puffs_vnreq_symlink *symlink_argp; 1400 int error; 1401 1402 *ap->a_vpp = NULL; 1403 1404 symlink_argp = malloc(sizeof(struct puffs_vnreq_symlink), 1405 M_PUFFS, M_ZERO | M_WAITOK); 1406 puffs_makecn(&symlink_argp->pvnr_cn, &symlink_argp->pvnr_cn_cred, 1407 &symlink_argp->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1408 symlink_argp->pvnr_va = *ap->a_vap; 1409 (void)strlcpy(symlink_argp->pvnr_link, ap->a_target, 1410 sizeof(symlink_argp->pvnr_link)); 1411 1412 error = puffs_vntouser(pmp, PUFFS_VN_SYMLINK, 1413 symlink_argp, sizeof(*symlink_argp), 0, ap->a_dvp, NULL); 1414 if (error) 1415 goto out; 1416 1417 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1418 symlink_argp->pvnr_newnode, ap->a_cnp, VLNK, 0); 1419 1420 out: 1421 free(symlink_argp, M_PUFFS); 1422 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1423 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1424 vput(ap->a_dvp); 1425 1426 return error; 1427 } 1428 1429 int 1430 puffs_readlink(void *v) 1431 { 1432 struct vop_readlink_args /* { 1433 const struct vnodeop_desc *a_desc; 1434 struct vnode *a_vp; 1435 struct uio *a_uio; 1436 kauth_cred_t a_cred; 1437 } */ *ap = v; 1438 size_t linklen; 1439 int error; 1440 1441 PUFFS_VNREQ(readlink); 1442 1443 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1444 linklen = sizeof(readlink_arg.pvnr_link); 1445 readlink_arg.pvnr_linklen = linklen; 1446 1447 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1448 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1449 ap->a_vp, NULL); 1450 if (error) 1451 return error; 1452 1453 /* bad bad user file server */ 1454 if (readlink_arg.pvnr_linklen > linklen) 1455 return EINVAL; 1456 1457 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1458 ap->a_uio); 1459 } 1460 1461 int 1462 puffs_rename(void *v) 1463 { 1464 struct vop_rename_args /* { 1465 const struct vnodeop_desc *a_desc; 1466 struct vnode *a_fdvp; 1467 struct vnode *a_fvp; 1468 struct componentname *a_fcnp; 1469 struct vnode *a_tdvp; 1470 struct vnode *a_tvp; 1471 struct componentname *a_tcnp; 1472 }*/ *ap = v; 1473 struct puffs_vnreq_rename *rename_argp = NULL; 1474 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_fdvp->v_mount); 1475 int error; 1476 1477 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1478 ERROUT(EXDEV); 1479 1480 rename_argp = malloc(sizeof(struct puffs_vnreq_rename), 1481 M_PUFFS, M_WAITOK | M_ZERO); 1482 1483 rename_argp->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1484 rename_argp->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1485 if (ap->a_tvp) 1486 rename_argp->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1487 else 1488 rename_argp->pvnr_cookie_targ = NULL; 1489 puffs_makecn(&rename_argp->pvnr_cn_src, 1490 &rename_argp->pvnr_cn_src_cred, &rename_argp->pvnr_cn_src_cid, 1491 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1492 puffs_makecn(&rename_argp->pvnr_cn_targ, 1493 &rename_argp->pvnr_cn_targ_cred, &rename_argp->pvnr_cn_targ_cid, 1494 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1495 1496 error = puffs_vntouser(pmp, PUFFS_VN_RENAME, 1497 rename_argp, sizeof(*rename_argp), 0, ap->a_fdvp, NULL); /* XXX */ 1498 1499 /* 1500 * XXX: stay in touch with the cache. I don't like this, but 1501 * don't have a better solution either. See also puffs_link(). 1502 */ 1503 if (error == 0) 1504 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1505 1506 out: 1507 if (rename_argp) 1508 free(rename_argp, M_PUFFS); 1509 if (ap->a_tvp != NULL) 1510 vput(ap->a_tvp); 1511 if (ap->a_tdvp == ap->a_tvp) 1512 vrele(ap->a_tdvp); 1513 else 1514 vput(ap->a_tdvp); 1515 1516 vrele(ap->a_fdvp); 1517 vrele(ap->a_fvp); 1518 1519 return error; 1520 } 1521 1522 #define RWARGS(cont, iofl, move, offset, creds) \ 1523 (cont)->pvnr_ioflag = (iofl); \ 1524 (cont)->pvnr_resid = (move); \ 1525 (cont)->pvnr_offset = (offset); \ 1526 puffs_credcvt(&(cont)->pvnr_cred, creds) 1527 1528 int 1529 puffs_read(void *v) 1530 { 1531 struct vop_read_args /* { 1532 const struct vnodeop_desc *a_desc; 1533 struct vnode *a_vp; 1534 struct uio *a_uio; 1535 int a_ioflag; 1536 kauth_cred_t a_cred; 1537 } */ *ap = v; 1538 struct puffs_vnreq_read *read_argp; 1539 struct puffs_mount *pmp; 1540 struct vnode *vp; 1541 struct uio *uio; 1542 void *win; 1543 size_t tomove, argsize; 1544 vsize_t bytelen; 1545 int error, ubcflags; 1546 1547 uio = ap->a_uio; 1548 vp = ap->a_vp; 1549 read_argp = NULL; 1550 error = 0; 1551 pmp = MPTOPUFFSMP(vp->v_mount); 1552 1553 /* std sanity */ 1554 if (uio->uio_resid == 0) 1555 return 0; 1556 if (uio->uio_offset < 0) 1557 return EINVAL; 1558 1559 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1560 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1561 1562 ubcflags = 0; 1563 if (UBC_WANT_UNMAP(vp)) 1564 ubcflags = UBC_UNMAP; 1565 1566 while (uio->uio_resid > 0) { 1567 bytelen = MIN(uio->uio_resid, 1568 vp->v_size - uio->uio_offset); 1569 if (bytelen == 0) 1570 break; 1571 1572 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1573 &bytelen, advice, UBC_READ); 1574 error = uiomove(win, bytelen, uio); 1575 ubc_release(win, ubcflags); 1576 if (error) 1577 break; 1578 } 1579 1580 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1581 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1582 } else { 1583 /* 1584 * in case it's not a regular file or we're operating 1585 * uncached, do read in the old-fashioned style, 1586 * i.e. explicit read operations 1587 */ 1588 1589 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1590 argsize = sizeof(struct puffs_vnreq_read); 1591 read_argp = malloc(argsize + tomove, 1592 M_PUFFS, M_WAITOK | M_ZERO); 1593 1594 error = 0; 1595 while (uio->uio_resid > 0) { 1596 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1597 RWARGS(read_argp, ap->a_ioflag, tomove, 1598 uio->uio_offset, ap->a_cred); 1599 1600 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1601 read_argp, argsize, tomove, 1602 ap->a_vp, NULL); 1603 if (error) 1604 break; 1605 1606 if (read_argp->pvnr_resid > tomove) { 1607 error = EINVAL; 1608 break; 1609 } 1610 1611 error = uiomove(read_argp->pvnr_data, 1612 tomove - read_argp->pvnr_resid, uio); 1613 1614 /* 1615 * in case the file is out of juice, resid from 1616 * userspace is != 0. and the error-case is 1617 * quite obvious 1618 */ 1619 if (error || read_argp->pvnr_resid) 1620 break; 1621 } 1622 } 1623 1624 if (read_argp) 1625 free(read_argp, M_PUFFS); 1626 return error; 1627 } 1628 1629 /* 1630 * XXX: in case of a failure, this leaves uio in a bad state. 1631 * We could theoretically copy the uio and iovecs and "replay" 1632 * them the right amount after the userspace trip, but don't 1633 * bother for now. 1634 */ 1635 int 1636 puffs_write(void *v) 1637 { 1638 struct vop_write_args /* { 1639 const struct vnodeop_desc *a_desc; 1640 struct vnode *a_vp; 1641 struct uio *a_uio; 1642 int a_ioflag; 1643 kauth_cred_t a_cred; 1644 } */ *ap = v; 1645 struct puffs_vnreq_write *write_argp; 1646 struct puffs_mount *pmp; 1647 struct uio *uio; 1648 struct vnode *vp; 1649 size_t tomove, argsize; 1650 off_t oldoff, newoff, origoff; 1651 vsize_t bytelen; 1652 int error, uflags; 1653 int ubcflags; 1654 1655 vp = ap->a_vp; 1656 uio = ap->a_uio; 1657 error = uflags = 0; 1658 write_argp = NULL; 1659 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1660 1661 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1662 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1663 if (UBC_WANT_UNMAP(vp)) 1664 ubcflags |= UBC_UNMAP; 1665 1666 /* 1667 * userspace *should* be allowed to control this, 1668 * but with UBC it's a bit unclear how to handle it 1669 */ 1670 if (ap->a_ioflag & IO_APPEND) 1671 uio->uio_offset = vp->v_size; 1672 1673 origoff = uio->uio_offset; 1674 while (uio->uio_resid > 0) { 1675 uflags |= PUFFS_UPDATECTIME; 1676 uflags |= PUFFS_UPDATEMTIME; 1677 oldoff = uio->uio_offset; 1678 bytelen = uio->uio_resid; 1679 1680 newoff = oldoff + bytelen; 1681 if (vp->v_size < newoff) { 1682 uvm_vnp_setwritesize(vp, newoff); 1683 } 1684 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1685 UVM_ADV_RANDOM, ubcflags); 1686 1687 /* 1688 * In case of a ubc_uiomove() error, 1689 * opt to not extend the file at all and 1690 * return an error. Otherwise, if we attempt 1691 * to clear the memory we couldn't fault to, 1692 * we might generate a kernel page fault. 1693 */ 1694 if (vp->v_size < newoff) { 1695 if (error == 0) { 1696 uflags |= PUFFS_UPDATESIZE; 1697 uvm_vnp_setsize(vp, newoff); 1698 } else { 1699 uvm_vnp_setwritesize(vp, vp->v_size); 1700 } 1701 } 1702 if (error) 1703 break; 1704 1705 /* 1706 * If we're writing large files, flush to file server 1707 * every 64k. Otherwise we can very easily exhaust 1708 * kernel and user memory, as the file server cannot 1709 * really keep up with our writing speed. 1710 * 1711 * Note: this does *NOT* honor MNT_ASYNC, because 1712 * that gives userland too much say in the kernel. 1713 */ 1714 if (oldoff >> 16 != uio->uio_offset >> 16) { 1715 simple_lock(&vp->v_interlock); 1716 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1717 uio->uio_offset & ~0xffff, 1718 PGO_CLEANIT | PGO_SYNCIO); 1719 if (error) 1720 break; 1721 } 1722 } 1723 1724 /* synchronous I/O? */ 1725 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1726 simple_lock(&vp->v_interlock); 1727 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1728 round_page(uio->uio_offset), 1729 PGO_CLEANIT | PGO_SYNCIO); 1730 1731 /* write through page cache? */ 1732 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1733 simple_lock(&vp->v_interlock); 1734 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1735 round_page(uio->uio_offset), PGO_CLEANIT); 1736 } 1737 1738 puffs_updatenode(vp, uflags); 1739 } else { 1740 /* tomove is non-increasing */ 1741 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1742 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1743 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1744 1745 while (uio->uio_resid > 0) { 1746 /* move data to buffer */ 1747 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1748 RWARGS(write_argp, ap->a_ioflag, tomove, 1749 uio->uio_offset, ap->a_cred); 1750 error = uiomove(write_argp->pvnr_data, tomove, uio); 1751 if (error) 1752 break; 1753 1754 /* move buffer to userspace */ 1755 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1756 PUFFS_VN_WRITE, write_argp, argsize, 0, 1757 ap->a_vp, NULL); 1758 if (error) 1759 break; 1760 1761 if (write_argp->pvnr_resid > tomove) { 1762 error = EINVAL; 1763 break; 1764 } 1765 1766 /* adjust file size */ 1767 if (vp->v_size < uio->uio_offset) 1768 uvm_vnp_setsize(vp, uio->uio_offset); 1769 1770 /* didn't move everything? bad userspace. bail */ 1771 if (write_argp->pvnr_resid != 0) { 1772 error = EIO; 1773 break; 1774 } 1775 } 1776 } 1777 1778 if (write_argp) 1779 free(write_argp, M_PUFFS); 1780 return error; 1781 } 1782 1783 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1784 1785 #define FCNIOCTL_ARG_MAX 1<<16 1786 int 1787 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1788 { 1789 1790 /* currently not supported */ 1791 return EOPNOTSUPP; 1792 #if 0 1793 /* struct vop_ioctl_args { 1794 const struct vnodeop_desc *a_desc; 1795 struct vnode *a_vp; 1796 u_long a_command; 1797 void *a_data; 1798 int a_fflag; 1799 kauth_cred_t a_cred; 1800 struct lwp *a_l; 1801 }*ap = v; */ 1802 struct puffs_mount *pmp; 1803 struct puffs_sizepark pspark; 1804 void *kernbuf; 1805 size_t copylen; 1806 int error; 1807 1808 PUFFS_VNREQ(fcnioctl); 1809 1810 /* 1811 * Since this op gives the filesystem (almost) complete control on 1812 * how much it is allowed to copy from the calling process 1813 * address space, do not enable it by default, since it would 1814 * be a whopping security hole. 1815 */ 1816 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1817 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1818 return EINVAL; /* only shoe that fits */ 1819 1820 /* fill in sizereq and store it */ 1821 pspark.pkso_reqid = puffs_getreqid(pmp); 1822 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1823 pspark.pkso_copybuf = ap->a_data; 1824 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1825 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1826 1827 /* then fill in actual request and shoot it off */ 1828 fcnioctl_arg.pvnr_command = ap->a_command; 1829 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1830 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1831 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1832 1833 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1834 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1835 pspark.pkso_reqid, ap->a_vp, NULL); 1836 1837 /* if we don't need to copy data, we're done */ 1838 if (error || !fcnioctl_arg.pvnr_copyback) 1839 return error; 1840 1841 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1842 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1843 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1844 if (error) 1845 goto out; 1846 error = copyout(kernbuf, ap->a_data, copylen); 1847 1848 out: 1849 free(kernbuf, M_PUFFS); 1850 return error; 1851 #endif 1852 } 1853 1854 int 1855 puffs_ioctl(void *v) 1856 { 1857 1858 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1859 } 1860 1861 int 1862 puffs_fcntl(void *v) 1863 { 1864 1865 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1866 } 1867 1868 int 1869 puffs_print(void *v) 1870 { 1871 struct vop_print_args /* { 1872 struct vnode *a_vp; 1873 } */ *ap = v; 1874 struct puffs_mount *pmp; 1875 struct vnode *vp = ap->a_vp; 1876 struct puffs_node *pn = vp->v_data; 1877 1878 PUFFS_VNREQ(print); 1879 1880 pmp = MPTOPUFFSMP(vp->v_mount); 1881 1882 /* kernel portion */ 1883 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1884 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1885 if (vp->v_type == VFIFO) 1886 fifo_printinfo(vp); 1887 lockmgr_printinfo(&vp->v_lock); 1888 1889 /* userspace portion */ 1890 if (EXISTSOP(pmp, PRINT)) 1891 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1892 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1893 1894 return 0; 1895 } 1896 1897 int 1898 puffs_pathconf(void *v) 1899 { 1900 struct vop_pathconf_args /* { 1901 const struct vnodeop_desc *a_desc; 1902 struct vnode *a_vp; 1903 int a_name; 1904 register_t *a_retval; 1905 } */ *ap = v; 1906 int error; 1907 1908 PUFFS_VNREQ(pathconf); 1909 1910 pathconf_arg.pvnr_name = ap->a_name; 1911 1912 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1913 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1914 ap->a_vp, NULL); 1915 if (error) 1916 return error; 1917 1918 *ap->a_retval = pathconf_arg.pvnr_retval; 1919 1920 return 0; 1921 } 1922 1923 int 1924 puffs_advlock(void *v) 1925 { 1926 struct vop_advlock_args /* { 1927 const struct vnodeop_desc *a_desc; 1928 struct vnode *a_vp; 1929 void *a_id; 1930 int a_op; 1931 struct flock *a_fl; 1932 int a_flags; 1933 } */ *ap = v; 1934 int error; 1935 1936 PUFFS_VNREQ(advlock); 1937 1938 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1939 if (error) 1940 return error; 1941 advlock_arg.pvnr_id = ap->a_id; 1942 advlock_arg.pvnr_op = ap->a_op; 1943 advlock_arg.pvnr_flags = ap->a_flags; 1944 1945 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1946 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1947 } 1948 1949 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 1950 #define BIOREAD(bp) (bp->b_flags & B_READ) 1951 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 1952 1953 /* 1954 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1955 */ 1956 int 1957 puffs_strategy(void *v) 1958 { 1959 struct vop_strategy_args /* { 1960 const struct vnodeop_desc *a_desc; 1961 struct vnode *a_vp; 1962 struct buf *a_bp; 1963 } */ *ap = v; 1964 struct puffs_mount *pmp; 1965 struct vnode *vp = ap->a_vp; 1966 struct puffs_node *pn; 1967 struct puffs_vnreq_readwrite *rw_argp = NULL; 1968 struct buf *bp; 1969 size_t argsize; 1970 size_t tomove, moved; 1971 int error, dofaf; 1972 1973 pmp = MPTOPUFFSMP(vp->v_mount); 1974 bp = ap->a_bp; 1975 error = 0; 1976 dofaf = 0; 1977 pn = VPTOPP(vp); 1978 1979 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 1980 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 1981 ERROUT(EOPNOTSUPP); 1982 1983 /* 1984 * Short-circuit optimization: don't flush buffer in between 1985 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1986 */ 1987 if (pn->pn_stat & PNODE_DYING) { 1988 KASSERT(BIOWRITE(bp)); 1989 bp->b_resid = 0; 1990 goto out; 1991 } 1992 1993 #ifdef DIAGNOSTIC 1994 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1995 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1996 bp->b_bcount); 1997 #endif 1998 1999 /* 2000 * See explanation for the necessity of a FAF in puffs_fsync. 2001 * 2002 * Also, do FAF in case we're suspending. 2003 * See puffs_vfsops.c:pageflush() 2004 */ 2005 if (BIOWRITE(bp)) { 2006 simple_lock(&vp->v_interlock); 2007 if (vp->v_flag & VXLOCK) 2008 dofaf = 1; 2009 if (pn->pn_stat & PNODE_SUSPEND) 2010 dofaf = 1; 2011 simple_unlock(&vp->v_interlock); 2012 } 2013 2014 if (BIOASYNC(bp)) 2015 dofaf = 1; 2016 2017 #ifdef DIAGNOSTIC 2018 if (curlwp == uvm.pagedaemon_lwp) 2019 KASSERT(dofaf); 2020 #endif 2021 2022 /* allocate transport structure */ 2023 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2024 argsize = sizeof(struct puffs_vnreq_readwrite); 2025 rw_argp = malloc(argsize + tomove, M_PUFFS, 2026 M_ZERO | (dofaf ? M_NOWAIT : M_WAITOK)); 2027 if (rw_argp == NULL) 2028 ERROUT(ENOMEM); 2029 RWARGS(rw_argp, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2030 2031 /* 2x2 cases: read/write, faf/nofaf */ 2032 if (BIOREAD(bp)) { 2033 if (dofaf) { 2034 puffs_vntouser_call(pmp, PUFFS_VN_READ, rw_argp, 2035 argsize, tomove, puffs_parkdone_asyncbioread, 2036 bp, vp, NULL); 2037 } else { 2038 error = puffs_vntouser(pmp, PUFFS_VN_READ, 2039 rw_argp, argsize, tomove, vp, NULL); 2040 if (error) 2041 goto out; 2042 2043 if (rw_argp->pvnr_resid > tomove) 2044 ERROUT(EINVAL); 2045 2046 moved = tomove - rw_argp->pvnr_resid; 2047 2048 (void)memcpy(bp->b_data, rw_argp->pvnr_data, moved); 2049 bp->b_resid = bp->b_bcount - moved; 2050 } 2051 } else { 2052 /* 2053 * make pages read-only before we write them if we want 2054 * write caching info 2055 */ 2056 if (PUFFS_WCACHEINFO(pmp)) { 2057 struct uvm_object *uobj = &vp->v_uobj; 2058 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2059 struct vm_page *vmp; 2060 int i; 2061 2062 for (i = 0; i < npages; i++) { 2063 vmp= uvm_pageratop((vaddr_t)bp->b_data 2064 + (i << PAGE_SHIFT)); 2065 DPRINTF(("puffs_strategy: write-protecting " 2066 "vp %p page %p, offset %" PRId64"\n", 2067 vp, vmp, vmp->offset)); 2068 simple_lock(&uobj->vmobjlock); 2069 vmp->flags |= PG_RDONLY; 2070 pmap_page_protect(vmp, VM_PROT_READ); 2071 simple_unlock(&uobj->vmobjlock); 2072 } 2073 } 2074 2075 (void)memcpy(&rw_argp->pvnr_data, bp->b_data, tomove); 2076 if (dofaf) { 2077 /* 2078 * assume FAF moves everything. frankly, we don't 2079 * really have a choice. 2080 */ 2081 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2082 PUFFS_VN_WRITE, rw_argp, argsize + tomove, vp); 2083 bp->b_resid = bp->b_bcount - tomove; 2084 } else { 2085 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2086 PUFFS_VN_WRITE, rw_argp, argsize + tomove, 2087 0, vp, NULL); 2088 if (error) 2089 goto out; 2090 2091 moved = tomove - rw_argp->pvnr_resid; 2092 if (rw_argp->pvnr_resid > tomove) 2093 ERROUT(EINVAL); 2094 2095 bp->b_resid = bp->b_bcount - moved; 2096 if (rw_argp->pvnr_resid != 0) 2097 ERROUT(EIO); 2098 } 2099 } 2100 2101 out: 2102 KASSERT(dofaf == 0 || error == 0 || rw_argp == NULL); 2103 if (rw_argp && !dofaf) 2104 free(rw_argp, M_PUFFS); 2105 2106 if (error) 2107 bp->b_error = error; 2108 2109 if (error || !(BIOREAD(bp) && BIOASYNC(bp))) 2110 biodone(bp); 2111 2112 return error; 2113 } 2114 2115 int 2116 puffs_mmap(void *v) 2117 { 2118 struct vop_mmap_args /* { 2119 const struct vnodeop_desc *a_desc; 2120 struct vnode *a_vp; 2121 vm_prot_t a_prot; 2122 kauth_cred_t a_cred; 2123 struct lwp *a_l; 2124 } */ *ap = v; 2125 struct puffs_mount *pmp; 2126 int error; 2127 2128 PUFFS_VNREQ(mmap); 2129 2130 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2131 2132 if (!PUFFS_USE_PAGECACHE(pmp)) 2133 return genfs_eopnotsupp(v); 2134 2135 if (EXISTSOP(pmp, MMAP)) { 2136 mmap_arg.pvnr_prot = ap->a_prot; 2137 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2138 puffs_cidcvt(&mmap_arg.pvnr_cid, ap->a_l); 2139 2140 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2141 &mmap_arg, sizeof(mmap_arg), 0, 2142 ap->a_vp, NULL); 2143 } else { 2144 error = genfs_mmap(v); 2145 } 2146 2147 return error; 2148 } 2149 2150 2151 /* 2152 * The rest don't get a free trip to userspace and back, they 2153 * have to stay within the kernel. 2154 */ 2155 2156 /* 2157 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2158 * well, maybe somehow, somewhere, some day .... 2159 */ 2160 int 2161 puffs_bmap(void *v) 2162 { 2163 struct vop_bmap_args /* { 2164 const struct vnodeop_desc *a_desc; 2165 struct vnode *a_vp; 2166 daddr_t a_bn; 2167 struct vnode **a_vpp; 2168 daddr_t *a_bnp; 2169 int *a_runp; 2170 } */ *ap = v; 2171 struct puffs_mount *pmp; 2172 2173 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2174 2175 if (ap->a_vpp) 2176 *ap->a_vpp = ap->a_vp; 2177 if (ap->a_bnp) 2178 *ap->a_bnp = ap->a_bn; 2179 if (ap->a_runp) 2180 *ap->a_runp 2181 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2182 2183 return 0; 2184 } 2185 2186 /* 2187 * Handle getpages faults in puffs. We let genfs_getpages() do most 2188 * of the dirty work, but we come in this route to do accounting tasks. 2189 * If the user server has specified functions for cache notifications 2190 * about reads and/or writes, we record which type of operation we got, 2191 * for which page range, and proceed to issue a FAF notification to the 2192 * server about it. 2193 */ 2194 int 2195 puffs_getpages(void *v) 2196 { 2197 struct vop_getpages_args /* { 2198 const struct vnodeop_desc *a_desc; 2199 struct vnode *a_vp; 2200 voff_t a_offset; 2201 struct vm_page **a_m; 2202 int *a_count; 2203 int a_centeridx; 2204 vm_prot_t a_access_type; 2205 int a_advice; 2206 int a_flags; 2207 } */ *ap = v; 2208 struct puffs_mount *pmp; 2209 struct puffs_node *pn; 2210 struct vnode *vp; 2211 struct vm_page **pgs; 2212 struct puffs_cacheinfo *pcinfo = NULL; 2213 struct puffs_cacherun *pcrun; 2214 void *parkmem = NULL; 2215 size_t runsizes; 2216 int i, npages, si, streakon; 2217 int error, locked, write; 2218 2219 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2220 npages = *ap->a_count; 2221 pgs = ap->a_m; 2222 vp = ap->a_vp; 2223 pn = vp->v_data; 2224 locked = (ap->a_flags & PGO_LOCKED) != 0; 2225 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2226 2227 /* ccg xnaht - gets Wuninitialized wrong */ 2228 pcrun = NULL; 2229 runsizes = 0; 2230 2231 /* 2232 * Check that we aren't trying to fault in pages which our file 2233 * server doesn't know about. This happens if we extend a file by 2234 * skipping some pages and later try to fault in pages which 2235 * are between pn_serversize and vp_size. This check optimizes 2236 * away the common case where a file is being extended. 2237 */ 2238 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2239 struct vattr va; 2240 2241 /* try again later when we can block */ 2242 if (locked) 2243 ERROUT(EBUSY); 2244 2245 simple_unlock(&vp->v_interlock); 2246 vattr_null(&va); 2247 va.va_size = vp->v_size; 2248 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2249 if (error) 2250 ERROUT(error); 2251 simple_lock(&vp->v_interlock); 2252 } 2253 2254 if (write && PUFFS_WCACHEINFO(pmp)) { 2255 /* allocate worst-case memory */ 2256 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2257 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2258 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2259 2260 /* 2261 * can't block if we're locked and can't mess up caching 2262 * information for fs server. so come back later, please 2263 */ 2264 if (pcinfo == NULL) 2265 ERROUT(ENOMEM); 2266 2267 parkmem = puffs_park_alloc(locked == 0); 2268 if (parkmem == NULL) 2269 ERROUT(ENOMEM); 2270 2271 pcrun = pcinfo->pcache_runs; 2272 } 2273 2274 error = genfs_getpages(v); 2275 if (error) 2276 goto out; 2277 2278 if (PUFFS_WCACHEINFO(pmp) == 0) 2279 goto out; 2280 2281 /* 2282 * Let's see whose fault it was and inform the user server of 2283 * possibly read/written pages. Map pages from read faults 2284 * strictly read-only, since otherwise we might miss info on 2285 * when the page is actually write-faulted to. 2286 */ 2287 if (!locked) 2288 simple_lock(&vp->v_uobj.vmobjlock); 2289 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2290 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2291 if (streakon && write) { 2292 streakon = 0; 2293 pcrun[si].pcache_runend 2294 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2295 si++; 2296 } 2297 continue; 2298 } 2299 if (streakon == 0 && write) { 2300 streakon = 1; 2301 pcrun[si].pcache_runstart = pgs[i]->offset; 2302 } 2303 2304 if (!write) 2305 pgs[i]->flags |= PG_RDONLY; 2306 } 2307 /* was the last page part of our streak? */ 2308 if (streakon) { 2309 pcrun[si].pcache_runend 2310 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2311 si++; 2312 } 2313 if (!locked) 2314 simple_unlock(&vp->v_uobj.vmobjlock); 2315 2316 KASSERT(si <= (npages / 2) + 1); 2317 2318 /* send results to userspace */ 2319 if (write) 2320 puffs_cacheop(pmp, parkmem, pcinfo, 2321 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2322 2323 out: 2324 if (error) { 2325 if (pcinfo != NULL) 2326 free(pcinfo, M_PUFFS); 2327 if (parkmem != NULL) 2328 puffs_park_release(parkmem, 1); 2329 } 2330 2331 return error; 2332 } 2333 2334 int 2335 puffs_lock(void *v) 2336 { 2337 struct vop_lock_args /* { 2338 struct vnode *a_vp; 2339 int a_flags; 2340 }*/ *ap = v; 2341 struct vnode *vp = ap->a_vp; 2342 struct mount *mp = vp->v_mount; 2343 2344 #if 0 2345 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2346 #endif 2347 2348 /* 2349 * XXX: this avoids deadlocking when we're suspending. 2350 * e.g. some ops holding the vnode lock might be blocked for 2351 * the vfs transaction lock so we'd deadlock. 2352 * 2353 * Now once again this is skating on the thin ice of modern life, 2354 * since we are breaking the consistency guarantee provided 2355 * _to the user server_ by vnode locking. Hopefully this will 2356 * get fixed soon enough by getting rid of the dependency on 2357 * vnode locks alltogether. 2358 */ 2359 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2360 if (ap->a_flags & LK_INTERLOCK) 2361 simple_unlock(&vp->v_interlock); 2362 return 0; 2363 } 2364 2365 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2366 } 2367 2368 int 2369 puffs_unlock(void *v) 2370 { 2371 struct vop_unlock_args /* { 2372 struct vnode *a_vp; 2373 int a_flags; 2374 } */ *ap = v; 2375 struct vnode *vp = ap->a_vp; 2376 struct mount *mp = vp->v_mount; 2377 2378 #if 0 2379 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2380 #endif 2381 2382 /* XXX: see puffs_lock() */ 2383 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2384 if (ap->a_flags & LK_INTERLOCK) 2385 simple_unlock(&vp->v_interlock); 2386 return 0; 2387 } 2388 2389 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2390 } 2391 2392 int 2393 puffs_islocked(void *v) 2394 { 2395 struct vop_islocked_args *ap = v; 2396 int rv; 2397 2398 rv = lockstatus(&ap->a_vp->v_lock); 2399 return rv; 2400 } 2401 2402 int 2403 puffs_generic(void *v) 2404 { 2405 struct vop_generic_args *ap = v; 2406 2407 (void)ap; 2408 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2409 2410 return EOPNOTSUPP; 2411 } 2412 2413 2414 /* 2415 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2416 * FAF update information for the puffs node first. 2417 */ 2418 int 2419 puffs_spec_read(void *v) 2420 { 2421 struct vop_read_args /* { 2422 const struct vnodeop_desc *a_desc; 2423 struct vnode *a_vp; 2424 struct uio *a_uio; 2425 int a_ioflag; 2426 kauth_cred_t a_cred; 2427 } */ *ap = v; 2428 2429 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2430 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2431 } 2432 2433 int 2434 puffs_spec_write(void *v) 2435 { 2436 struct vop_write_args /* { 2437 const struct vnodeop_desc *a_desc; 2438 struct vnode *a_vp; 2439 struct uio *a_uio; 2440 int a_ioflag; 2441 kauth_cred_t a_cred; 2442 }*/ *ap = v; 2443 2444 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2445 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2446 } 2447 2448 int 2449 puffs_fifo_read(void *v) 2450 { 2451 struct vop_read_args /* { 2452 const struct vnodeop_desc *a_desc; 2453 struct vnode *a_vp; 2454 struct uio *a_uio; 2455 int a_ioflag; 2456 kauth_cred_t a_cred; 2457 } */ *ap = v; 2458 2459 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2460 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2461 } 2462 2463 int 2464 puffs_fifo_write(void *v) 2465 { 2466 struct vop_write_args /* { 2467 const struct vnodeop_desc *a_desc; 2468 struct vnode *a_vp; 2469 struct uio *a_uio; 2470 int a_ioflag; 2471 kauth_cred_t a_cred; 2472 }*/ *ap = v; 2473 2474 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2475 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2476 } 2477
Indexes created Tue Sep 30 17:09:57 GMT 2025