puffs_vnops.c revision 1.147
1 /* $NetBSD: puffs_vnops.c,v 1.147 2010/07/14 14:07:37 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 1.147 2010/07/14 14:07:37 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.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_vnop_lookup(void *); 53 int puffs_vnop_create(void *); 54 int puffs_vnop_access(void *); 55 int puffs_vnop_mknod(void *); 56 int puffs_vnop_open(void *); 57 int puffs_vnop_close(void *); 58 int puffs_vnop_getattr(void *); 59 int puffs_vnop_setattr(void *); 60 int puffs_vnop_reclaim(void *); 61 int puffs_vnop_readdir(void *); 62 int puffs_vnop_poll(void *); 63 int puffs_vnop_fsync(void *); 64 int puffs_vnop_seek(void *); 65 int puffs_vnop_remove(void *); 66 int puffs_vnop_mkdir(void *); 67 int puffs_vnop_rmdir(void *); 68 int puffs_vnop_link(void *); 69 int puffs_vnop_readlink(void *); 70 int puffs_vnop_symlink(void *); 71 int puffs_vnop_rename(void *); 72 int puffs_vnop_read(void *); 73 int puffs_vnop_write(void *); 74 int puffs_vnop_fcntl(void *); 75 int puffs_vnop_ioctl(void *); 76 int puffs_vnop_inactive(void *); 77 int puffs_vnop_print(void *); 78 int puffs_vnop_pathconf(void *); 79 int puffs_vnop_advlock(void *); 80 int puffs_vnop_strategy(void *); 81 int puffs_vnop_bmap(void *); 82 int puffs_vnop_mmap(void *); 83 int puffs_vnop_getpages(void *); 84 int puffs_vnop_abortop(void *); 85 int puffs_vnop_getextattr(void *); 86 int puffs_vnop_setextattr(void *); 87 int puffs_vnop_listextattr(void *); 88 int puffs_vnop_deleteextattr(void *); 89 90 int puffs_vnop_spec_read(void *); 91 int puffs_vnop_spec_write(void *); 92 int puffs_vnop_fifo_read(void *); 93 int puffs_vnop_fifo_write(void *); 94 95 int puffs_vnop_checkop(void *); 96 97 #define puffs_vnop_lock genfs_lock 98 #define puffs_vnop_unlock genfs_unlock 99 #define puffs_vnop_islocked genfs_islocked 100 101 int (**puffs_vnodeop_p)(void *); 102 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 103 { &vop_default_desc, vn_default_error }, 104 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 105 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 106 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 107 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 108 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 109 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 110 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 111 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 112 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 113 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 114 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 115 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 116 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 117 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 118 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 119 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 120 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 121 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 122 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 123 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 124 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 125 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 126 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 127 { &vop_advlock_desc, puffs_vnop_checkop }, /* advlock */ 128 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 129 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 130 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 131 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 132 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 133 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 134 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 135 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 136 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 137 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 138 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 139 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 140 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 141 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 142 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 143 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 144 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 145 #if 0 146 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 147 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 148 #endif 149 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 150 { NULL, NULL } 151 }; 152 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 153 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 154 155 156 int (**puffs_specop_p)(void *); 157 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 158 { &vop_default_desc, vn_default_error }, 159 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 160 { &vop_create_desc, spec_create }, /* genfs_badop */ 161 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 162 { &vop_open_desc, spec_open }, /* spec_open */ 163 { &vop_close_desc, spec_close }, /* spec_close */ 164 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 165 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 166 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 167 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 168 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 169 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 170 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 171 { &vop_poll_desc, spec_poll }, /* spec_poll */ 172 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 173 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 174 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 175 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 176 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 177 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 178 { &vop_link_desc, spec_link }, /* genfs_badop */ 179 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 180 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 181 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 182 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 183 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 184 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 185 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 186 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 187 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 188 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 189 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 190 { &vop_bmap_desc, spec_bmap }, /* dummy */ 191 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 192 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 193 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 194 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 195 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 196 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 197 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 198 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 199 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 200 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 201 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 202 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 203 #if 0 204 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 205 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 206 #endif 207 { NULL, NULL } 208 }; 209 const struct vnodeopv_desc puffs_specop_opv_desc = 210 { &puffs_specop_p, puffs_specop_entries }; 211 212 213 int (**puffs_fifoop_p)(void *); 214 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 215 { &vop_default_desc, vn_default_error }, 216 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 217 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 218 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 219 { &vop_open_desc, vn_fifo_bypass }, /* open */ 220 { &vop_close_desc, vn_fifo_bypass }, /* close */ 221 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 222 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 223 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 224 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 225 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 226 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 227 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 228 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 229 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 230 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 231 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 232 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 233 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 234 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 235 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 236 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 237 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 238 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 239 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 241 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 244 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 245 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 246 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 247 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 248 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 249 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 250 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 251 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 252 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 253 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 254 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 255 #if 0 256 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 257 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 258 #endif 259 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 260 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 261 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 262 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 263 { NULL, NULL } 264 }; 265 const struct vnodeopv_desc puffs_fifoop_opv_desc = 266 { &puffs_fifoop_p, puffs_fifoop_entries }; 267 268 269 /* "real" vnode operations */ 270 int (**puffs_msgop_p)(void *); 271 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 272 { &vop_default_desc, vn_default_error }, 273 { &vop_create_desc, puffs_vnop_create }, /* create */ 274 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 275 { &vop_open_desc, puffs_vnop_open }, /* open */ 276 { &vop_close_desc, puffs_vnop_close }, /* close */ 277 { &vop_access_desc, puffs_vnop_access }, /* access */ 278 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 279 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 280 { &vop_read_desc, puffs_vnop_read }, /* read */ 281 { &vop_write_desc, puffs_vnop_write }, /* write */ 282 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 283 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 284 { &vop_link_desc, puffs_vnop_link }, /* link */ 285 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 286 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 287 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 288 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 289 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 290 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 291 { &vop_print_desc, puffs_vnop_print }, /* print */ 292 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 293 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 294 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 295 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 296 { NULL, NULL } 297 }; 298 const struct vnodeopv_desc puffs_msgop_opv_desc = 299 { &puffs_msgop_p, puffs_msgop_entries }; 300 301 302 #define ERROUT(err) \ 303 do { \ 304 error = err; \ 305 goto out; \ 306 } while (/*CONSTCOND*/0) 307 308 /* 309 * This is a generic vnode operation handler. It checks if the necessary 310 * operations for the called vnode operation are implemented by userspace 311 * and either returns a dummy return value or proceeds to call the real 312 * vnode operation from puffs_msgop_v. 313 * 314 * XXX: this should described elsewhere and autogenerated, the complexity 315 * of the vnode operations vectors and their interrelationships is also 316 * getting a bit out of hand. Another problem is that we need this same 317 * information in the fs server code, so keeping the two in sync manually 318 * is not a viable (long term) plan. 319 */ 320 321 /* not supported, handle locking protocol */ 322 #define CHECKOP_NOTSUPP(op) \ 323 case VOP_##op##_DESCOFFSET: \ 324 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 325 return genfs_eopnotsupp(v); \ 326 break 327 328 /* always succeed, no locking */ 329 #define CHECKOP_SUCCESS(op) \ 330 case VOP_##op##_DESCOFFSET: \ 331 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 332 return 0; \ 333 break 334 335 int 336 puffs_vnop_checkop(void *v) 337 { 338 struct vop_generic_args /* { 339 struct vnodeop_desc *a_desc; 340 spooky mystery contents; 341 } */ *ap = v; 342 struct vnodeop_desc *desc = ap->a_desc; 343 struct puffs_mount *pmp; 344 struct vnode *vp; 345 int offset, rv; 346 347 offset = ap->a_desc->vdesc_vp_offsets[0]; 348 #ifdef DIAGNOSTIC 349 if (offset == VDESC_NO_OFFSET) 350 panic("puffs_checkop: no vnode, why did you call me?"); 351 #endif 352 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 353 pmp = MPTOPUFFSMP(vp->v_mount); 354 355 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 356 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 357 358 if (!ALLOPS(pmp)) { 359 switch (desc->vdesc_offset) { 360 CHECKOP_NOTSUPP(CREATE); 361 CHECKOP_NOTSUPP(MKNOD); 362 CHECKOP_NOTSUPP(GETATTR); 363 CHECKOP_NOTSUPP(SETATTR); 364 CHECKOP_NOTSUPP(READ); 365 CHECKOP_NOTSUPP(WRITE); 366 CHECKOP_NOTSUPP(FCNTL); 367 CHECKOP_NOTSUPP(IOCTL); 368 CHECKOP_NOTSUPP(REMOVE); 369 CHECKOP_NOTSUPP(LINK); 370 CHECKOP_NOTSUPP(RENAME); 371 CHECKOP_NOTSUPP(MKDIR); 372 CHECKOP_NOTSUPP(RMDIR); 373 CHECKOP_NOTSUPP(SYMLINK); 374 CHECKOP_NOTSUPP(READDIR); 375 CHECKOP_NOTSUPP(READLINK); 376 CHECKOP_NOTSUPP(PRINT); 377 CHECKOP_NOTSUPP(PATHCONF); 378 CHECKOP_NOTSUPP(ADVLOCK); 379 CHECKOP_NOTSUPP(GETEXTATTR); 380 CHECKOP_NOTSUPP(SETEXTATTR); 381 CHECKOP_NOTSUPP(LISTEXTATTR); 382 CHECKOP_NOTSUPP(DELETEEXTATTR); 383 384 CHECKOP_SUCCESS(ACCESS); 385 CHECKOP_SUCCESS(CLOSE); 386 CHECKOP_SUCCESS(SEEK); 387 388 case VOP_GETPAGES_DESCOFFSET: 389 if (!EXISTSOP(pmp, READ)) 390 return genfs_eopnotsupp(v); 391 break; 392 393 default: 394 panic("puffs_checkop: unhandled vnop %d", 395 desc->vdesc_offset); 396 } 397 } 398 399 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 400 401 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 402 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 403 404 return rv; 405 } 406 407 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 408 struct componentname *); 409 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 410 struct componentname *); 411 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 412 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 413 static int flushvncache(struct vnode *, off_t, off_t, bool); 414 415 416 #define PUFFS_ABORT_LOOKUP 1 417 #define PUFFS_ABORT_CREATE 2 418 #define PUFFS_ABORT_MKNOD 3 419 #define PUFFS_ABORT_MKDIR 4 420 #define PUFFS_ABORT_SYMLINK 5 421 422 /* 423 * Press the pani^Wabort button! Kernel resource allocation failed. 424 */ 425 static void 426 puffs_abortbutton(struct puffs_mount *pmp, int what, 427 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 428 { 429 430 switch (what) { 431 case PUFFS_ABORT_CREATE: 432 case PUFFS_ABORT_MKNOD: 433 case PUFFS_ABORT_SYMLINK: 434 callremove(pmp, dck, ck, cnp); 435 break; 436 case PUFFS_ABORT_MKDIR: 437 callrmdir(pmp, dck, ck, cnp); 438 break; 439 } 440 441 callinactive(pmp, ck, 0); 442 callreclaim(pmp, ck); 443 } 444 445 /* 446 * Begin vnode operations. 447 * 448 * A word from the keymaster about locks: generally we don't want 449 * to use the vnode locks at all: it creates an ugly dependency between 450 * the userlandia file server and the kernel. But we'll play along with 451 * the kernel vnode locks for now. However, even currently we attempt 452 * to release locks as early as possible. This is possible for some 453 * operations which a) don't need a locked vnode after the userspace op 454 * and b) return with the vnode unlocked. Theoretically we could 455 * unlock-do op-lock for others and order the graph in userspace, but I 456 * don't want to think of the consequences for the time being. 457 */ 458 459 int 460 puffs_vnop_lookup(void *v) 461 { 462 struct vop_lookup_args /* { 463 const struct vnodeop_desc *a_desc; 464 struct vnode *a_dvp; 465 struct vnode **a_vpp; 466 struct componentname *a_cnp; 467 } */ *ap = v; 468 PUFFS_MSG_VARS(vn, lookup); 469 struct puffs_mount *pmp; 470 struct componentname *cnp; 471 struct vnode *vp, *dvp; 472 struct puffs_node *dpn; 473 int isdot; 474 int error; 475 476 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 477 cnp = ap->a_cnp; 478 dvp = ap->a_dvp; 479 *ap->a_vpp = NULL; 480 481 /* r/o fs? we check create later to handle EEXIST */ 482 if ((cnp->cn_flags & ISLASTCN) 483 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 484 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 485 return EROFS; 486 487 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 488 489 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 490 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 491 492 /* 493 * Check if someone fed it into the cache 494 */ 495 if (PUFFS_USE_NAMECACHE(pmp)) { 496 error = cache_lookup(dvp, ap->a_vpp, cnp); 497 498 if (error >= 0) 499 return error; 500 } 501 502 if (isdot) { 503 /* deal with rename lookup semantics */ 504 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 505 return EISDIR; 506 507 vp = ap->a_dvp; 508 vref(vp); 509 *ap->a_vpp = vp; 510 return 0; 511 } 512 513 PUFFS_MSG_ALLOC(vn, lookup); 514 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 515 cnp, PUFFS_USE_FULLPNBUF(pmp)); 516 517 if (cnp->cn_flags & ISDOTDOT) 518 VOP_UNLOCK(dvp); 519 520 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 521 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 522 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 523 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 524 525 /* 526 * In case of error, there is no new vnode to play with, so be 527 * happy with the NULL value given to vpp in the beginning. 528 * Also, check if this really was an error or the target was not 529 * present. Either treat it as a non-error for CREATE/RENAME or 530 * enter the component into the negative name cache (if desired). 531 */ 532 if (error) { 533 error = checkerr(pmp, error, __func__); 534 if (error == ENOENT) { 535 /* don't allow to create files on r/o fs */ 536 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 537 && cnp->cn_nameiop == CREATE) { 538 error = EROFS; 539 540 /* adjust values if we are creating */ 541 } else if ((cnp->cn_flags & ISLASTCN) 542 && (cnp->cn_nameiop == CREATE 543 || cnp->cn_nameiop == RENAME)) { 544 cnp->cn_flags |= SAVENAME; 545 error = EJUSTRETURN; 546 547 /* save negative cache entry */ 548 } else { 549 if ((cnp->cn_flags & MAKEENTRY) 550 && PUFFS_USE_NAMECACHE(pmp)) 551 cache_enter(dvp, NULL, cnp); 552 } 553 } 554 goto out; 555 } 556 557 /* 558 * Check that we don't get our parent node back, that would cause 559 * a pretty obvious deadlock. 560 */ 561 dpn = dvp->v_data; 562 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 563 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 564 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 565 error = EPROTO; 566 goto out; 567 } 568 569 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 570 if (error == PUFFS_NOSUCHCOOKIE) { 571 error = puffs_getvnode(dvp->v_mount, 572 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 573 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 574 if (error) { 575 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 576 lookup_msg->pvnr_newnode, ap->a_cnp); 577 goto out; 578 } 579 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 580 } else if (error) { 581 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 582 lookup_msg->pvnr_newnode, ap->a_cnp); 583 goto out; 584 } 585 586 *ap->a_vpp = vp; 587 588 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 589 cache_enter(dvp, vp, cnp); 590 591 /* XXX */ 592 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 593 cnp->cn_flags &= ~REQUIREDIR; 594 if (lookup_msg->pvnr_cn.pkcn_consume) 595 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 596 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 597 598 /* 599 * We need the name in remove and rmdir (well, rename too, but 600 * SAVESTART takes care of that) 601 */ 602 if (cnp->cn_nameiop == DELETE) 603 cnp->cn_flags |= SAVENAME; 604 605 out: 606 if (cnp->cn_flags & ISDOTDOT) 607 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 608 609 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 610 PUFFS_MSG_RELEASE(lookup); 611 return error; 612 } 613 614 #define REFPN_AND_UNLOCKVP(a, b) \ 615 do { \ 616 mutex_enter(&b->pn_mtx); \ 617 puffs_referencenode(b); \ 618 mutex_exit(&b->pn_mtx); \ 619 VOP_UNLOCK(a); \ 620 } while (/*CONSTCOND*/0) 621 622 #define REFPN(b) \ 623 do { \ 624 mutex_enter(&b->pn_mtx); \ 625 puffs_referencenode(b); \ 626 mutex_exit(&b->pn_mtx); \ 627 } while (/*CONSTCOND*/0) 628 629 #define RELEPN_AND_VP(a, b) \ 630 do { \ 631 puffs_releasenode(b); \ 632 vrele(a); \ 633 } while (/*CONSTCOND*/0) 634 635 int 636 puffs_vnop_create(void *v) 637 { 638 struct vop_create_args /* { 639 const struct vnodeop_desc *a_desc; 640 struct vnode *a_dvp; 641 struct vnode **a_vpp; 642 struct componentname *a_cnp; 643 struct vattr *a_vap; 644 } */ *ap = v; 645 PUFFS_MSG_VARS(vn, create); 646 struct vnode *dvp = ap->a_dvp; 647 struct puffs_node *dpn = VPTOPP(dvp); 648 struct componentname *cnp = ap->a_cnp; 649 struct mount *mp = dvp->v_mount; 650 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 651 int error; 652 653 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 654 dvp, ap->a_cnp->cn_nameptr)); 655 656 PUFFS_MSG_ALLOC(vn, create); 657 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 658 cnp, PUFFS_USE_FULLPNBUF(pmp)); 659 create_msg->pvnr_va = *ap->a_vap; 660 puffs_msg_setinfo(park_create, PUFFSOP_VN, 661 PUFFS_VN_CREATE, VPTOPNC(dvp)); 662 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 663 664 error = checkerr(pmp, error, __func__); 665 if (error) 666 goto out; 667 668 error = puffs_newnode(mp, dvp, ap->a_vpp, 669 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 670 if (error) 671 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 672 create_msg->pvnr_newnode, cnp); 673 674 out: 675 vput(dvp); 676 if (error || (cnp->cn_flags & SAVESTART) == 0) 677 PNBUF_PUT(cnp->cn_pnbuf); 678 679 DPRINTF(("puffs_create: return %d\n", error)); 680 PUFFS_MSG_RELEASE(create); 681 return error; 682 } 683 684 int 685 puffs_vnop_mknod(void *v) 686 { 687 struct vop_mknod_args /* { 688 const struct vnodeop_desc *a_desc; 689 struct vnode *a_dvp; 690 struct vnode **a_vpp; 691 struct componentname *a_cnp; 692 struct vattr *a_vap; 693 } */ *ap = v; 694 PUFFS_MSG_VARS(vn, mknod); 695 struct vnode *dvp = ap->a_dvp; 696 struct puffs_node *dpn = VPTOPP(dvp); 697 struct componentname *cnp = ap->a_cnp; 698 struct mount *mp = dvp->v_mount; 699 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 700 int error; 701 702 PUFFS_MSG_ALLOC(vn, mknod); 703 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 704 cnp, PUFFS_USE_FULLPNBUF(pmp)); 705 mknod_msg->pvnr_va = *ap->a_vap; 706 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 707 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 708 709 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 710 711 error = checkerr(pmp, error, __func__); 712 if (error) 713 goto out; 714 715 error = puffs_newnode(mp, dvp, ap->a_vpp, 716 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 717 ap->a_vap->va_rdev); 718 if (error) 719 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 720 mknod_msg->pvnr_newnode, cnp); 721 722 out: 723 vput(dvp); 724 PUFFS_MSG_RELEASE(mknod); 725 if (error || (cnp->cn_flags & SAVESTART) == 0) 726 PNBUF_PUT(cnp->cn_pnbuf); 727 return error; 728 } 729 730 int 731 puffs_vnop_open(void *v) 732 { 733 struct vop_open_args /* { 734 const struct vnodeop_desc *a_desc; 735 struct vnode *a_vp; 736 int a_mode; 737 kauth_cred_t a_cred; 738 } */ *ap = v; 739 PUFFS_MSG_VARS(vn, open); 740 struct vnode *vp = ap->a_vp; 741 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 742 int mode = ap->a_mode; 743 int error; 744 745 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 746 747 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 748 ERROUT(EROFS); 749 750 if (!EXISTSOP(pmp, OPEN)) 751 ERROUT(0); 752 753 PUFFS_MSG_ALLOC(vn, open); 754 open_msg->pvnr_mode = mode; 755 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 756 puffs_msg_setinfo(park_open, PUFFSOP_VN, 757 PUFFS_VN_OPEN, VPTOPNC(vp)); 758 759 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 760 error = checkerr(pmp, error, __func__); 761 762 out: 763 DPRINTF(("puffs_open: returning %d\n", error)); 764 PUFFS_MSG_RELEASE(open); 765 return error; 766 } 767 768 int 769 puffs_vnop_close(void *v) 770 { 771 struct vop_close_args /* { 772 const struct vnodeop_desc *a_desc; 773 struct vnode *a_vp; 774 int a_fflag; 775 kauth_cred_t a_cred; 776 } */ *ap = v; 777 PUFFS_MSG_VARS(vn, close); 778 struct vnode *vp = ap->a_vp; 779 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 780 781 PUFFS_MSG_ALLOC(vn, close); 782 puffs_msg_setfaf(park_close); 783 close_msg->pvnr_fflag = ap->a_fflag; 784 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 785 puffs_msg_setinfo(park_close, PUFFSOP_VN, 786 PUFFS_VN_CLOSE, VPTOPNC(vp)); 787 788 puffs_msg_enqueue(pmp, park_close); 789 PUFFS_MSG_RELEASE(close); 790 return 0; 791 } 792 793 int 794 puffs_vnop_access(void *v) 795 { 796 struct vop_access_args /* { 797 const struct vnodeop_desc *a_desc; 798 struct vnode *a_vp; 799 int a_mode; 800 kauth_cred_t a_cred; 801 } */ *ap = v; 802 PUFFS_MSG_VARS(vn, access); 803 struct vnode *vp = ap->a_vp; 804 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 805 int mode = ap->a_mode; 806 int error; 807 808 if (mode & VWRITE) { 809 switch (vp->v_type) { 810 case VDIR: 811 case VLNK: 812 case VREG: 813 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 814 || !EXISTSOP(pmp, WRITE)) 815 return EROFS; 816 break; 817 default: 818 break; 819 } 820 } 821 822 if (!EXISTSOP(pmp, ACCESS)) 823 return 0; 824 825 PUFFS_MSG_ALLOC(vn, access); 826 access_msg->pvnr_mode = ap->a_mode; 827 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 828 puffs_msg_setinfo(park_access, PUFFSOP_VN, 829 PUFFS_VN_ACCESS, VPTOPNC(vp)); 830 831 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 832 error = checkerr(pmp, error, __func__); 833 PUFFS_MSG_RELEASE(access); 834 835 return error; 836 } 837 838 int 839 puffs_vnop_getattr(void *v) 840 { 841 struct vop_getattr_args /* { 842 const struct vnodeop_desc *a_desc; 843 struct vnode *a_vp; 844 struct vattr *a_vap; 845 kauth_cred_t a_cred; 846 } */ *ap = v; 847 PUFFS_MSG_VARS(vn, getattr); 848 struct vnode *vp = ap->a_vp; 849 struct mount *mp = vp->v_mount; 850 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 851 struct vattr *vap, *rvap; 852 struct puffs_node *pn = VPTOPP(vp); 853 int error = 0; 854 855 REFPN(pn); 856 vap = ap->a_vap; 857 858 PUFFS_MSG_ALLOC(vn, getattr); 859 vattr_null(&getattr_msg->pvnr_va); 860 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 861 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 862 PUFFS_VN_GETATTR, VPTOPNC(vp)); 863 864 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 865 error = checkerr(pmp, error, __func__); 866 if (error) 867 goto out; 868 869 rvap = &getattr_msg->pvnr_va; 870 /* 871 * Don't listen to the file server regarding special device 872 * size info, the file server doesn't know anything about them. 873 */ 874 if (vp->v_type == VBLK || vp->v_type == VCHR) 875 rvap->va_size = vp->v_size; 876 877 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 878 if (vp->v_type == VBLK) 879 rvap->va_blocksize = BLKDEV_IOSIZE; 880 else if (vp->v_type == VCHR) 881 rvap->va_blocksize = MAXBSIZE; 882 883 (void) memcpy(vap, rvap, sizeof(struct vattr)); 884 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 885 886 if (pn->pn_stat & PNODE_METACACHE_ATIME) 887 vap->va_atime = pn->pn_mc_atime; 888 if (pn->pn_stat & PNODE_METACACHE_CTIME) 889 vap->va_ctime = pn->pn_mc_ctime; 890 if (pn->pn_stat & PNODE_METACACHE_MTIME) 891 vap->va_mtime = pn->pn_mc_mtime; 892 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 893 vap->va_size = pn->pn_mc_size; 894 } else { 895 if (rvap->va_size != VNOVAL 896 && vp->v_type != VBLK && vp->v_type != VCHR) { 897 uvm_vnp_setsize(vp, rvap->va_size); 898 pn->pn_serversize = rvap->va_size; 899 } 900 } 901 902 out: 903 puffs_releasenode(pn); 904 PUFFS_MSG_RELEASE(getattr); 905 return error; 906 } 907 908 #define SETATTR_CHSIZE 0x01 909 #define SETATTR_ASYNC 0x02 910 static int 911 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 912 { 913 PUFFS_MSG_VARS(vn, setattr); 914 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 915 struct puffs_node *pn = vp->v_data; 916 int error = 0; 917 918 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 919 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 920 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 921 || vap->va_mode != (mode_t)VNOVAL)) 922 return EROFS; 923 924 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 925 && vp->v_type == VREG && vap->va_size != VNOVAL) 926 return EROFS; 927 928 /* 929 * Flush metacache first. If we are called with some explicit 930 * parameters, treat them as information overriding metacache 931 * information. 932 */ 933 if (pn->pn_stat & PNODE_METACACHE_MASK) { 934 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 935 && vap->va_atime.tv_sec == VNOVAL) 936 vap->va_atime = pn->pn_mc_atime; 937 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 938 && vap->va_ctime.tv_sec == VNOVAL) 939 vap->va_ctime = pn->pn_mc_ctime; 940 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 941 && vap->va_mtime.tv_sec == VNOVAL) 942 vap->va_mtime = pn->pn_mc_mtime; 943 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 944 && vap->va_size == VNOVAL) 945 vap->va_size = pn->pn_mc_size; 946 947 pn->pn_stat &= ~PNODE_METACACHE_MASK; 948 } 949 950 PUFFS_MSG_ALLOC(vn, setattr); 951 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 952 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 953 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 954 PUFFS_VN_SETATTR, VPTOPNC(vp)); 955 if (flags & SETATTR_ASYNC) 956 puffs_msg_setfaf(park_setattr); 957 958 puffs_msg_enqueue(pmp, park_setattr); 959 if ((flags & SETATTR_ASYNC) == 0) 960 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 961 PUFFS_MSG_RELEASE(setattr); 962 if ((flags & SETATTR_ASYNC) == 0) { 963 error = checkerr(pmp, error, __func__); 964 if (error) 965 return error; 966 } else { 967 error = 0; 968 } 969 970 if (vap->va_size != VNOVAL) { 971 pn->pn_serversize = vap->va_size; 972 if (flags & SETATTR_CHSIZE) 973 uvm_vnp_setsize(vp, vap->va_size); 974 } 975 976 return 0; 977 } 978 979 int 980 puffs_vnop_setattr(void *v) 981 { 982 struct vop_getattr_args /* { 983 const struct vnodeop_desc *a_desc; 984 struct vnode *a_vp; 985 struct vattr *a_vap; 986 kauth_cred_t a_cred; 987 } */ *ap = v; 988 989 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 990 } 991 992 static __inline int 993 doinact(struct puffs_mount *pmp, int iaflag) 994 { 995 996 if (EXISTSOP(pmp, INACTIVE)) 997 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 998 if (iaflag || ALLOPS(pmp)) 999 return 1; 1000 else 1001 return 0; 1002 else 1003 return 1; 1004 else 1005 return 0; 1006 } 1007 1008 static void 1009 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1010 { 1011 int error; 1012 PUFFS_MSG_VARS(vn, inactive); 1013 1014 if (doinact(pmp, iaflag)) { 1015 PUFFS_MSG_ALLOC(vn, inactive); 1016 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1017 PUFFS_VN_INACTIVE, ck); 1018 1019 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1020 PUFFS_MSG_RELEASE(inactive); 1021 } 1022 } 1023 1024 /* XXX: callinactive can't setback */ 1025 int 1026 puffs_vnop_inactive(void *v) 1027 { 1028 struct vop_inactive_args /* { 1029 const struct vnodeop_desc *a_desc; 1030 struct vnode *a_vp; 1031 } */ *ap = v; 1032 PUFFS_MSG_VARS(vn, inactive); 1033 struct vnode *vp = ap->a_vp; 1034 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1035 struct puffs_node *pnode; 1036 int error; 1037 1038 pnode = vp->v_data; 1039 1040 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1041 flushvncache(vp, 0, 0, false); 1042 PUFFS_MSG_ALLOC(vn, inactive); 1043 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1044 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1045 1046 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1047 NULL, error); 1048 PUFFS_MSG_RELEASE(inactive); 1049 } 1050 pnode->pn_stat &= ~PNODE_DOINACT; 1051 1052 /* 1053 * file server thinks it's gone? then don't be afraid care, 1054 * node's life was already all it would ever be 1055 */ 1056 if (pnode->pn_stat & PNODE_NOREFS) { 1057 pnode->pn_stat |= PNODE_DYING; 1058 *ap->a_recycle = true; 1059 } 1060 1061 VOP_UNLOCK(vp); 1062 1063 return 0; 1064 } 1065 1066 static void 1067 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1068 { 1069 PUFFS_MSG_VARS(vn, reclaim); 1070 1071 if (!EXISTSOP(pmp, RECLAIM)) 1072 return; 1073 1074 PUFFS_MSG_ALLOC(vn, reclaim); 1075 puffs_msg_setfaf(park_reclaim); 1076 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1077 1078 puffs_msg_enqueue(pmp, park_reclaim); 1079 PUFFS_MSG_RELEASE(reclaim); 1080 } 1081 1082 /* 1083 * always FAF, we don't really care if the server wants to fail to 1084 * reclaim the node or not 1085 */ 1086 int 1087 puffs_vnop_reclaim(void *v) 1088 { 1089 struct vop_reclaim_args /* { 1090 const struct vnodeop_desc *a_desc; 1091 struct vnode *a_vp; 1092 } */ *ap = v; 1093 struct vnode *vp = ap->a_vp; 1094 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1095 struct puffs_node *pnode = vp->v_data; 1096 bool notifyserver = true; 1097 1098 /* 1099 * first things first: check if someone is trying to reclaim the 1100 * root vnode. do not allow that to travel to userspace. 1101 * Note that we don't need to take the lock similarly to 1102 * puffs_root(), since there is only one of us. 1103 */ 1104 if (vp->v_vflag & VV_ROOT) { 1105 mutex_enter(&pmp->pmp_lock); 1106 KASSERT(pmp->pmp_root != NULL); 1107 pmp->pmp_root = NULL; 1108 mutex_exit(&pmp->pmp_lock); 1109 notifyserver = false; 1110 } 1111 1112 /* 1113 * purge info from kernel before issueing FAF, since we 1114 * don't really know when we'll get around to it after 1115 * that and someone might race us into node creation 1116 */ 1117 mutex_enter(&pmp->pmp_lock); 1118 LIST_REMOVE(pnode, pn_hashent); 1119 mutex_exit(&pmp->pmp_lock); 1120 if (PUFFS_USE_NAMECACHE(pmp)) 1121 cache_purge(vp); 1122 1123 if (notifyserver) 1124 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1125 1126 puffs_putvnode(vp); 1127 1128 return 0; 1129 } 1130 1131 #define CSIZE sizeof(**ap->a_cookies) 1132 int 1133 puffs_vnop_readdir(void *v) 1134 { 1135 struct vop_readdir_args /* { 1136 const struct vnodeop_desc *a_desc; 1137 struct vnode *a_vp; 1138 struct uio *a_uio; 1139 kauth_cred_t a_cred; 1140 int *a_eofflag; 1141 off_t **a_cookies; 1142 int *a_ncookies; 1143 } */ *ap = v; 1144 PUFFS_MSG_VARS(vn, readdir); 1145 struct vnode *vp = ap->a_vp; 1146 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1147 size_t argsize, tomove, cookiemem, cookiesmax; 1148 struct uio *uio = ap->a_uio; 1149 size_t howmuch, resid; 1150 int error; 1151 1152 /* 1153 * ok, so we need: resid + cookiemem = maxreq 1154 * => resid + cookiesize * (resid/minsize) = maxreq 1155 * => resid + cookiesize/minsize * resid = maxreq 1156 * => (cookiesize/minsize + 1) * resid = maxreq 1157 * => resid = maxreq / (cookiesize/minsize + 1) 1158 * 1159 * Since cookiesize <= minsize and we're not very big on floats, 1160 * we approximate that to be 1. Therefore: 1161 * 1162 * resid = maxreq / 2; 1163 * 1164 * Well, at least we didn't have to use differential equations 1165 * or the Gram-Schmidt process. 1166 * 1167 * (yes, I'm very afraid of this) 1168 */ 1169 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1170 1171 if (ap->a_cookies) { 1172 KASSERT(ap->a_ncookies != NULL); 1173 if (pmp->pmp_args.pa_fhsize == 0) 1174 return EOPNOTSUPP; 1175 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1176 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1177 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1178 } else { 1179 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1180 cookiesmax = 0; 1181 cookiemem = 0; 1182 } 1183 1184 argsize = sizeof(struct puffs_vnmsg_readdir); 1185 tomove = resid + cookiemem; 1186 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1187 (void *)&readdir_msg, 1); 1188 1189 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1190 readdir_msg->pvnr_offset = uio->uio_offset; 1191 readdir_msg->pvnr_resid = resid; 1192 readdir_msg->pvnr_ncookies = cookiesmax; 1193 readdir_msg->pvnr_eofflag = 0; 1194 readdir_msg->pvnr_dentoff = cookiemem; 1195 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1196 PUFFS_VN_READDIR, VPTOPNC(vp)); 1197 puffs_msg_setdelta(park_readdir, tomove); 1198 1199 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1200 error = checkerr(pmp, error, __func__); 1201 if (error) 1202 goto out; 1203 1204 /* userspace is cheating? */ 1205 if (readdir_msg->pvnr_resid > resid) { 1206 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1207 "resid grew", VPTOPNC(vp)); 1208 ERROUT(EPROTO); 1209 } 1210 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1211 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1212 "too many cookies", VPTOPNC(vp)); 1213 ERROUT(EPROTO); 1214 } 1215 1216 /* check eof */ 1217 if (readdir_msg->pvnr_eofflag) 1218 *ap->a_eofflag = 1; 1219 1220 /* bouncy-wouncy with the directory data */ 1221 howmuch = resid - readdir_msg->pvnr_resid; 1222 1223 /* force eof if no data was returned (getcwd() needs this) */ 1224 if (howmuch == 0) { 1225 *ap->a_eofflag = 1; 1226 goto out; 1227 } 1228 1229 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1230 if (error) 1231 goto out; 1232 1233 /* provide cookies to caller if so desired */ 1234 if (ap->a_cookies) { 1235 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1236 M_TEMP, M_WAITOK); 1237 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1238 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1239 *ap->a_ncookies*CSIZE); 1240 } 1241 1242 /* next readdir starts here */ 1243 uio->uio_offset = readdir_msg->pvnr_offset; 1244 1245 out: 1246 puffs_msgmem_release(park_readdir); 1247 return error; 1248 } 1249 #undef CSIZE 1250 1251 /* 1252 * poll works by consuming the bitmask in pn_revents. If there are 1253 * events available, poll returns immediately. If not, it issues a 1254 * poll to userspace, selrecords itself and returns with no available 1255 * events. When the file server returns, it executes puffs_parkdone_poll(), 1256 * where available events are added to the bitmask. selnotify() is 1257 * then also executed by that function causing us to enter here again 1258 * and hopefully find the missing bits (unless someone got them first, 1259 * in which case it starts all over again). 1260 */ 1261 int 1262 puffs_vnop_poll(void *v) 1263 { 1264 struct vop_poll_args /* { 1265 const struct vnodeop_desc *a_desc; 1266 struct vnode *a_vp; 1267 int a_events; 1268 } */ *ap = v; 1269 PUFFS_MSG_VARS(vn, poll); 1270 struct vnode *vp = ap->a_vp; 1271 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1272 struct puffs_node *pn = vp->v_data; 1273 int events, error; 1274 1275 if (EXISTSOP(pmp, POLL)) { 1276 mutex_enter(&pn->pn_mtx); 1277 events = pn->pn_revents & ap->a_events; 1278 if (events & ap->a_events) { 1279 pn->pn_revents &= ~ap->a_events; 1280 mutex_exit(&pn->pn_mtx); 1281 1282 return events; 1283 } else { 1284 puffs_referencenode(pn); 1285 mutex_exit(&pn->pn_mtx); 1286 1287 PUFFS_MSG_ALLOC(vn, poll); 1288 poll_msg->pvnr_events = ap->a_events; 1289 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1290 PUFFS_VN_POLL, VPTOPNC(vp)); 1291 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1292 selrecord(curlwp, &pn->pn_sel); 1293 1294 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1295 NULL, error); 1296 PUFFS_MSG_RELEASE(poll); 1297 1298 return 0; 1299 } 1300 } else { 1301 return genfs_poll(v); 1302 } 1303 } 1304 1305 static int 1306 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1307 { 1308 struct puffs_node *pn = VPTOPP(vp); 1309 struct vattr va; 1310 int pflags, error; 1311 1312 /* flush out information from our metacache, see vop_setattr */ 1313 if (pn->pn_stat & PNODE_METACACHE_MASK 1314 && (pn->pn_stat & PNODE_DYING) == 0) { 1315 vattr_null(&va); 1316 error = dosetattr(vp, &va, FSCRED, 1317 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1318 if (error) 1319 return error; 1320 } 1321 1322 /* 1323 * flush pages to avoid being overly dirty 1324 */ 1325 pflags = PGO_CLEANIT; 1326 if (wait) 1327 pflags |= PGO_SYNCIO; 1328 mutex_enter(&vp->v_interlock); 1329 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1330 } 1331 1332 int 1333 puffs_vnop_fsync(void *v) 1334 { 1335 struct vop_fsync_args /* { 1336 const struct vnodeop_desc *a_desc; 1337 struct vnode *a_vp; 1338 kauth_cred_t a_cred; 1339 int a_flags; 1340 off_t a_offlo; 1341 off_t a_offhi; 1342 } */ *ap = v; 1343 PUFFS_MSG_VARS(vn, fsync); 1344 struct vnode *vp = ap->a_vp; 1345 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1346 struct puffs_node *pn = VPTOPP(vp); 1347 int error, dofaf; 1348 1349 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1350 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1351 if (error) 1352 return error; 1353 1354 /* 1355 * HELLO! We exit already here if the user server does not 1356 * support fsync OR if we should call fsync for a node which 1357 * has references neither in the kernel or the fs server. 1358 * Otherwise we continue to issue fsync() forward. 1359 */ 1360 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1361 return 0; 1362 1363 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1364 /* 1365 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1366 * only FAFs for those. Otherwise there's a danger of deadlock, 1367 * since the execution context here might be the user server 1368 * doing some operation on another fs, which in turn caused a 1369 * vnode to be reclaimed from the freelist for this fs. 1370 */ 1371 if (dofaf == 0) { 1372 mutex_enter(&vp->v_interlock); 1373 if (vp->v_iflag & VI_XLOCK) 1374 dofaf = 1; 1375 mutex_exit(&vp->v_interlock); 1376 } 1377 1378 PUFFS_MSG_ALLOC(vn, fsync); 1379 if (dofaf) 1380 puffs_msg_setfaf(park_fsync); 1381 1382 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1383 fsync_msg->pvnr_flags = ap->a_flags; 1384 fsync_msg->pvnr_offlo = ap->a_offlo; 1385 fsync_msg->pvnr_offhi = ap->a_offhi; 1386 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1387 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1388 1389 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1390 PUFFS_MSG_RELEASE(fsync); 1391 1392 error = checkerr(pmp, error, __func__); 1393 1394 return error; 1395 } 1396 1397 int 1398 puffs_vnop_seek(void *v) 1399 { 1400 struct vop_seek_args /* { 1401 const struct vnodeop_desc *a_desc; 1402 struct vnode *a_vp; 1403 off_t a_oldoff; 1404 off_t a_newoff; 1405 kauth_cred_t a_cred; 1406 } */ *ap = v; 1407 PUFFS_MSG_VARS(vn, seek); 1408 struct vnode *vp = ap->a_vp; 1409 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1410 int error; 1411 1412 PUFFS_MSG_ALLOC(vn, seek); 1413 seek_msg->pvnr_oldoff = ap->a_oldoff; 1414 seek_msg->pvnr_newoff = ap->a_newoff; 1415 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1416 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1417 PUFFS_VN_SEEK, VPTOPNC(vp)); 1418 1419 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1420 PUFFS_MSG_RELEASE(seek); 1421 return checkerr(pmp, error, __func__); 1422 } 1423 1424 static int 1425 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1426 struct componentname *cnp) 1427 { 1428 PUFFS_MSG_VARS(vn, remove); 1429 int error; 1430 1431 PUFFS_MSG_ALLOC(vn, remove); 1432 remove_msg->pvnr_cookie_targ = ck; 1433 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1434 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1435 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1436 1437 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1438 PUFFS_MSG_RELEASE(remove); 1439 1440 return checkerr(pmp, error, __func__); 1441 } 1442 1443 /* 1444 * XXX: can't use callremove now because can't catch setbacks with 1445 * it due to lack of a pnode argument. 1446 */ 1447 int 1448 puffs_vnop_remove(void *v) 1449 { 1450 struct vop_remove_args /* { 1451 const struct vnodeop_desc *a_desc; 1452 struct vnode *a_dvp; 1453 struct vnode *a_vp; 1454 struct componentname *a_cnp; 1455 } */ *ap = v; 1456 PUFFS_MSG_VARS(vn, remove); 1457 struct vnode *dvp = ap->a_dvp; 1458 struct vnode *vp = ap->a_vp; 1459 struct puffs_node *dpn = VPTOPP(dvp); 1460 struct puffs_node *pn = VPTOPP(vp); 1461 struct componentname *cnp = ap->a_cnp; 1462 struct mount *mp = dvp->v_mount; 1463 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1464 int error; 1465 1466 PUFFS_MSG_ALLOC(vn, remove); 1467 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1468 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1469 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1470 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1471 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1472 1473 puffs_msg_enqueue(pmp, park_remove); 1474 REFPN_AND_UNLOCKVP(dvp, dpn); 1475 if (dvp == vp) 1476 REFPN(pn); 1477 else 1478 REFPN_AND_UNLOCKVP(vp, pn); 1479 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1480 1481 PUFFS_MSG_RELEASE(remove); 1482 1483 RELEPN_AND_VP(dvp, dpn); 1484 RELEPN_AND_VP(vp, pn); 1485 1486 error = checkerr(pmp, error, __func__); 1487 if (error || (cnp->cn_flags & SAVESTART) == 0) 1488 PNBUF_PUT(cnp->cn_pnbuf); 1489 return error; 1490 } 1491 1492 int 1493 puffs_vnop_mkdir(void *v) 1494 { 1495 struct vop_mkdir_args /* { 1496 const struct vnodeop_desc *a_desc; 1497 struct vnode *a_dvp; 1498 struct vnode **a_vpp; 1499 struct componentname *a_cnp; 1500 struct vattr *a_vap; 1501 } */ *ap = v; 1502 PUFFS_MSG_VARS(vn, mkdir); 1503 struct vnode *dvp = ap->a_dvp; 1504 struct puffs_node *dpn = VPTOPP(dvp); 1505 struct componentname *cnp = ap->a_cnp; 1506 struct mount *mp = dvp->v_mount; 1507 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1508 int error; 1509 1510 PUFFS_MSG_ALLOC(vn, mkdir); 1511 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1512 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1513 mkdir_msg->pvnr_va = *ap->a_vap; 1514 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1515 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1516 1517 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1518 1519 error = checkerr(pmp, error, __func__); 1520 if (error) 1521 goto out; 1522 1523 error = puffs_newnode(mp, dvp, ap->a_vpp, 1524 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1525 if (error) 1526 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1527 mkdir_msg->pvnr_newnode, cnp); 1528 1529 out: 1530 vput(dvp); 1531 PUFFS_MSG_RELEASE(mkdir); 1532 if (error || (cnp->cn_flags & SAVESTART) == 0) 1533 PNBUF_PUT(cnp->cn_pnbuf); 1534 return error; 1535 } 1536 1537 static int 1538 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1539 struct componentname *cnp) 1540 { 1541 PUFFS_MSG_VARS(vn, rmdir); 1542 int error; 1543 1544 PUFFS_MSG_ALLOC(vn, rmdir); 1545 rmdir_msg->pvnr_cookie_targ = ck; 1546 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1547 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1548 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1549 1550 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1551 PUFFS_MSG_RELEASE(rmdir); 1552 1553 return checkerr(pmp, error, __func__); 1554 } 1555 1556 int 1557 puffs_vnop_rmdir(void *v) 1558 { 1559 struct vop_rmdir_args /* { 1560 const struct vnodeop_desc *a_desc; 1561 struct vnode *a_dvp; 1562 struct vnode *a_vp; 1563 struct componentname *a_cnp; 1564 } */ *ap = v; 1565 PUFFS_MSG_VARS(vn, rmdir); 1566 struct vnode *dvp = ap->a_dvp; 1567 struct vnode *vp = ap->a_vp; 1568 struct puffs_node *dpn = VPTOPP(dvp); 1569 struct puffs_node *pn = VPTOPP(vp); 1570 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1571 struct componentname *cnp = ap->a_cnp; 1572 int error; 1573 1574 PUFFS_MSG_ALLOC(vn, rmdir); 1575 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1576 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1577 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1578 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1579 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1580 1581 puffs_msg_enqueue(pmp, park_rmdir); 1582 REFPN_AND_UNLOCKVP(dvp, dpn); 1583 REFPN_AND_UNLOCKVP(vp, pn); 1584 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1585 1586 PUFFS_MSG_RELEASE(rmdir); 1587 1588 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1589 RELEPN_AND_VP(dvp, dpn); 1590 RELEPN_AND_VP(vp, pn); 1591 1592 if (error || (cnp->cn_flags & SAVESTART) == 0) 1593 PNBUF_PUT(cnp->cn_pnbuf); 1594 1595 return error; 1596 } 1597 1598 int 1599 puffs_vnop_link(void *v) 1600 { 1601 struct vop_link_args /* { 1602 const struct vnodeop_desc *a_desc; 1603 struct vnode *a_dvp; 1604 struct vnode *a_vp; 1605 struct componentname *a_cnp; 1606 } */ *ap = v; 1607 PUFFS_MSG_VARS(vn, link); 1608 struct vnode *dvp = ap->a_dvp; 1609 struct vnode *vp = ap->a_vp; 1610 struct puffs_node *dpn = VPTOPP(dvp); 1611 struct puffs_node *pn = VPTOPP(vp); 1612 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1613 struct componentname *cnp = ap->a_cnp; 1614 int error; 1615 1616 PUFFS_MSG_ALLOC(vn, link); 1617 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1618 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1619 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1620 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1621 PUFFS_VN_LINK, VPTOPNC(dvp)); 1622 1623 puffs_msg_enqueue(pmp, park_link); 1624 REFPN_AND_UNLOCKVP(dvp, dpn); 1625 REFPN(pn); 1626 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1627 1628 PUFFS_MSG_RELEASE(link); 1629 1630 error = checkerr(pmp, error, __func__); 1631 1632 /* 1633 * XXX: stay in touch with the cache. I don't like this, but 1634 * don't have a better solution either. See also puffs_rename(). 1635 */ 1636 if (error == 0) 1637 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1638 1639 PNBUF_PUT(cnp->cn_pnbuf); 1640 RELEPN_AND_VP(dvp, dpn); 1641 puffs_releasenode(pn); 1642 1643 return error; 1644 } 1645 1646 int 1647 puffs_vnop_symlink(void *v) 1648 { 1649 struct vop_symlink_args /* { 1650 const struct vnodeop_desc *a_desc; 1651 struct vnode *a_dvp; 1652 struct vnode **a_vpp; 1653 struct componentname *a_cnp; 1654 struct vattr *a_vap; 1655 char *a_target; 1656 } */ *ap = v; 1657 PUFFS_MSG_VARS(vn, symlink); 1658 struct vnode *dvp = ap->a_dvp; 1659 struct puffs_node *dpn = VPTOPP(dvp); 1660 struct mount *mp = dvp->v_mount; 1661 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1662 struct componentname *cnp = ap->a_cnp; 1663 int error; 1664 1665 *ap->a_vpp = NULL; 1666 1667 PUFFS_MSG_ALLOC(vn, symlink); 1668 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1669 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1670 symlink_msg->pvnr_va = *ap->a_vap; 1671 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1672 sizeof(symlink_msg->pvnr_link)); 1673 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1674 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1675 1676 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1677 1678 error = checkerr(pmp, error, __func__); 1679 if (error) 1680 goto out; 1681 1682 error = puffs_newnode(mp, dvp, ap->a_vpp, 1683 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1684 if (error) 1685 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1686 symlink_msg->pvnr_newnode, cnp); 1687 1688 out: 1689 vput(dvp); 1690 PUFFS_MSG_RELEASE(symlink); 1691 if (error || (cnp->cn_flags & SAVESTART) == 0) 1692 PNBUF_PUT(cnp->cn_pnbuf); 1693 1694 return error; 1695 } 1696 1697 int 1698 puffs_vnop_readlink(void *v) 1699 { 1700 struct vop_readlink_args /* { 1701 const struct vnodeop_desc *a_desc; 1702 struct vnode *a_vp; 1703 struct uio *a_uio; 1704 kauth_cred_t a_cred; 1705 } */ *ap = v; 1706 PUFFS_MSG_VARS(vn, readlink); 1707 struct vnode *vp = ap->a_vp; 1708 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1709 size_t linklen; 1710 int error; 1711 1712 PUFFS_MSG_ALLOC(vn, readlink); 1713 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1714 linklen = sizeof(readlink_msg->pvnr_link); 1715 readlink_msg->pvnr_linklen = linklen; 1716 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1717 PUFFS_VN_READLINK, VPTOPNC(vp)); 1718 1719 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1720 error = checkerr(pmp, error, __func__); 1721 if (error) 1722 goto out; 1723 1724 /* bad bad user file server */ 1725 if (readlink_msg->pvnr_linklen > linklen) { 1726 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1727 "linklen too big", VPTOPNC(ap->a_vp)); 1728 error = EPROTO; 1729 goto out; 1730 } 1731 1732 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1733 ap->a_uio); 1734 out: 1735 PUFFS_MSG_RELEASE(readlink); 1736 return error; 1737 } 1738 1739 int 1740 puffs_vnop_rename(void *v) 1741 { 1742 struct vop_rename_args /* { 1743 const struct vnodeop_desc *a_desc; 1744 struct vnode *a_fdvp; 1745 struct vnode *a_fvp; 1746 struct componentname *a_fcnp; 1747 struct vnode *a_tdvp; 1748 struct vnode *a_tvp; 1749 struct componentname *a_tcnp; 1750 } */ *ap = v; 1751 PUFFS_MSG_VARS(vn, rename); 1752 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 1753 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 1754 struct puffs_node *fpn = ap->a_fvp->v_data; 1755 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1756 int error; 1757 bool doabort = true; 1758 1759 if ((fvp->v_mount != tdvp->v_mount) || 1760 (tvp && (fvp->v_mount != tvp->v_mount))) { 1761 ERROUT(EXDEV); 1762 } 1763 1764 PUFFS_MSG_ALLOC(vn, rename); 1765 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 1766 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 1767 if (tvp) 1768 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 1769 else 1770 rename_msg->pvnr_cookie_targ = NULL; 1771 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1772 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1773 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1774 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1775 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1776 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1777 1778 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1779 doabort = false; 1780 PUFFS_MSG_RELEASE(rename); 1781 error = checkerr(pmp, error, __func__); 1782 1783 /* 1784 * XXX: stay in touch with the cache. I don't like this, but 1785 * don't have a better solution either. See also puffs_link(). 1786 */ 1787 if (error == 0) 1788 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1789 1790 out: 1791 if (doabort) 1792 VOP_ABORTOP(tdvp, ap->a_tcnp); 1793 if (tvp != NULL) 1794 vput(tvp); 1795 if (tdvp == tvp) 1796 vrele(tdvp); 1797 else 1798 vput(tdvp); 1799 1800 if (doabort) 1801 VOP_ABORTOP(fdvp, ap->a_fcnp); 1802 vrele(fdvp); 1803 vrele(fvp); 1804 1805 return error; 1806 } 1807 1808 #define RWARGS(cont, iofl, move, offset, creds) \ 1809 (cont)->pvnr_ioflag = (iofl); \ 1810 (cont)->pvnr_resid = (move); \ 1811 (cont)->pvnr_offset = (offset); \ 1812 puffs_credcvt(&(cont)->pvnr_cred, creds) 1813 1814 int 1815 puffs_vnop_read(void *v) 1816 { 1817 struct vop_read_args /* { 1818 const struct vnodeop_desc *a_desc; 1819 struct vnode *a_vp; 1820 struct uio *a_uio; 1821 int a_ioflag; 1822 kauth_cred_t a_cred; 1823 } */ *ap = v; 1824 PUFFS_MSG_VARS(vn, read); 1825 struct vnode *vp = ap->a_vp; 1826 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1827 struct uio *uio = ap->a_uio; 1828 size_t tomove, argsize; 1829 vsize_t bytelen; 1830 int error; 1831 1832 read_msg = NULL; 1833 error = 0; 1834 1835 /* std sanity */ 1836 if (uio->uio_resid == 0) 1837 return 0; 1838 if (uio->uio_offset < 0) 1839 return EINVAL; 1840 1841 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1842 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1843 1844 while (uio->uio_resid > 0) { 1845 bytelen = MIN(uio->uio_resid, 1846 vp->v_size - uio->uio_offset); 1847 if (bytelen == 0) 1848 break; 1849 1850 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1851 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1852 if (error) 1853 break; 1854 } 1855 1856 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1857 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1858 } else { 1859 /* 1860 * in case it's not a regular file or we're operating 1861 * uncached, do read in the old-fashioned style, 1862 * i.e. explicit read operations 1863 */ 1864 1865 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1866 argsize = sizeof(struct puffs_vnmsg_read); 1867 puffs_msgmem_alloc(argsize + tomove, &park_read, 1868 (void *)&read_msg, 1); 1869 1870 error = 0; 1871 while (uio->uio_resid > 0) { 1872 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1873 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1874 RWARGS(read_msg, ap->a_ioflag, tomove, 1875 uio->uio_offset, ap->a_cred); 1876 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1877 PUFFS_VN_READ, VPTOPNC(vp)); 1878 puffs_msg_setdelta(park_read, tomove); 1879 1880 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1881 NULL, error); 1882 error = checkerr(pmp, error, __func__); 1883 if (error) 1884 break; 1885 1886 if (read_msg->pvnr_resid > tomove) { 1887 puffs_senderr(pmp, PUFFS_ERR_READ, 1888 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1889 error = EPROTO; 1890 break; 1891 } 1892 1893 error = uiomove(read_msg->pvnr_data, 1894 tomove - read_msg->pvnr_resid, uio); 1895 1896 /* 1897 * in case the file is out of juice, resid from 1898 * userspace is != 0. and the error-case is 1899 * quite obvious 1900 */ 1901 if (error || read_msg->pvnr_resid) 1902 break; 1903 } 1904 1905 puffs_msgmem_release(park_read); 1906 } 1907 1908 return error; 1909 } 1910 1911 /* 1912 * XXX: in case of a failure, this leaves uio in a bad state. 1913 * We could theoretically copy the uio and iovecs and "replay" 1914 * them the right amount after the userspace trip, but don't 1915 * bother for now. 1916 */ 1917 int 1918 puffs_vnop_write(void *v) 1919 { 1920 struct vop_write_args /* { 1921 const struct vnodeop_desc *a_desc; 1922 struct vnode *a_vp; 1923 struct uio *a_uio; 1924 int a_ioflag; 1925 kauth_cred_t a_cred; 1926 } */ *ap = v; 1927 PUFFS_MSG_VARS(vn, write); 1928 struct vnode *vp = ap->a_vp; 1929 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1930 struct uio *uio = ap->a_uio; 1931 size_t tomove, argsize; 1932 off_t oldoff, newoff, origoff; 1933 vsize_t bytelen; 1934 int error, uflags; 1935 int ubcflags; 1936 1937 error = uflags = 0; 1938 write_msg = NULL; 1939 1940 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1941 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1942 1943 /* 1944 * userspace *should* be allowed to control this, 1945 * but with UBC it's a bit unclear how to handle it 1946 */ 1947 if (ap->a_ioflag & IO_APPEND) 1948 uio->uio_offset = vp->v_size; 1949 1950 origoff = uio->uio_offset; 1951 while (uio->uio_resid > 0) { 1952 uflags |= PUFFS_UPDATECTIME; 1953 uflags |= PUFFS_UPDATEMTIME; 1954 oldoff = uio->uio_offset; 1955 bytelen = uio->uio_resid; 1956 1957 newoff = oldoff + bytelen; 1958 if (vp->v_size < newoff) { 1959 uvm_vnp_setwritesize(vp, newoff); 1960 } 1961 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1962 UVM_ADV_RANDOM, ubcflags); 1963 1964 /* 1965 * In case of a ubc_uiomove() error, 1966 * opt to not extend the file at all and 1967 * return an error. Otherwise, if we attempt 1968 * to clear the memory we couldn't fault to, 1969 * we might generate a kernel page fault. 1970 */ 1971 if (vp->v_size < newoff) { 1972 if (error == 0) { 1973 uflags |= PUFFS_UPDATESIZE; 1974 uvm_vnp_setsize(vp, newoff); 1975 } else { 1976 uvm_vnp_setwritesize(vp, vp->v_size); 1977 } 1978 } 1979 if (error) 1980 break; 1981 1982 /* 1983 * If we're writing large files, flush to file server 1984 * every 64k. Otherwise we can very easily exhaust 1985 * kernel and user memory, as the file server cannot 1986 * really keep up with our writing speed. 1987 * 1988 * Note: this does *NOT* honor MNT_ASYNC, because 1989 * that gives userland too much say in the kernel. 1990 */ 1991 if (oldoff >> 16 != uio->uio_offset >> 16) { 1992 mutex_enter(&vp->v_interlock); 1993 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1994 uio->uio_offset & ~0xffff, 1995 PGO_CLEANIT | PGO_SYNCIO); 1996 if (error) 1997 break; 1998 } 1999 } 2000 2001 /* synchronous I/O? */ 2002 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2003 mutex_enter(&vp->v_interlock); 2004 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2005 round_page(uio->uio_offset), 2006 PGO_CLEANIT | PGO_SYNCIO); 2007 2008 /* write through page cache? */ 2009 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2010 mutex_enter(&vp->v_interlock); 2011 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2012 round_page(uio->uio_offset), PGO_CLEANIT); 2013 } 2014 2015 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2016 } else { 2017 /* tomove is non-increasing */ 2018 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2019 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2020 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2021 2022 while (uio->uio_resid > 0) { 2023 /* move data to buffer */ 2024 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2025 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2026 RWARGS(write_msg, ap->a_ioflag, tomove, 2027 uio->uio_offset, ap->a_cred); 2028 error = uiomove(write_msg->pvnr_data, tomove, uio); 2029 if (error) 2030 break; 2031 2032 /* move buffer to userspace */ 2033 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2034 PUFFS_VN_WRITE, VPTOPNC(vp)); 2035 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2036 NULL, error); 2037 error = checkerr(pmp, error, __func__); 2038 if (error) 2039 break; 2040 2041 if (write_msg->pvnr_resid > tomove) { 2042 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2043 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2044 error = EPROTO; 2045 break; 2046 } 2047 2048 /* adjust file size */ 2049 if (vp->v_size < uio->uio_offset) 2050 uvm_vnp_setsize(vp, uio->uio_offset); 2051 2052 /* didn't move everything? bad userspace. bail */ 2053 if (write_msg->pvnr_resid != 0) { 2054 error = EIO; 2055 break; 2056 } 2057 } 2058 puffs_msgmem_release(park_write); 2059 } 2060 2061 return error; 2062 } 2063 2064 int 2065 puffs_vnop_print(void *v) 2066 { 2067 struct vop_print_args /* { 2068 struct vnode *a_vp; 2069 } */ *ap = v; 2070 PUFFS_MSG_VARS(vn, print); 2071 struct vnode *vp = ap->a_vp; 2072 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2073 struct puffs_node *pn = vp->v_data; 2074 int error; 2075 2076 /* kernel portion */ 2077 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2078 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2079 if (vp->v_type == VFIFO) 2080 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2081 printf("\n"); 2082 2083 /* userspace portion */ 2084 if (EXISTSOP(pmp, PRINT)) { 2085 PUFFS_MSG_ALLOC(vn, print); 2086 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2087 PUFFS_VN_PRINT, VPTOPNC(vp)); 2088 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2089 NULL, error); 2090 PUFFS_MSG_RELEASE(print); 2091 } 2092 2093 return 0; 2094 } 2095 2096 int 2097 puffs_vnop_pathconf(void *v) 2098 { 2099 struct vop_pathconf_args /* { 2100 const struct vnodeop_desc *a_desc; 2101 struct vnode *a_vp; 2102 int a_name; 2103 register_t *a_retval; 2104 } */ *ap = v; 2105 PUFFS_MSG_VARS(vn, pathconf); 2106 struct vnode *vp = ap->a_vp; 2107 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2108 int error; 2109 2110 PUFFS_MSG_ALLOC(vn, pathconf); 2111 pathconf_msg->pvnr_name = ap->a_name; 2112 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2113 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2114 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2115 error = checkerr(pmp, error, __func__); 2116 if (!error) 2117 *ap->a_retval = pathconf_msg->pvnr_retval; 2118 PUFFS_MSG_RELEASE(pathconf); 2119 2120 return error; 2121 } 2122 2123 int 2124 puffs_vnop_advlock(void *v) 2125 { 2126 struct vop_advlock_args /* { 2127 const struct vnodeop_desc *a_desc; 2128 struct vnode *a_vp; 2129 void *a_id; 2130 int a_op; 2131 struct flock *a_fl; 2132 int a_flags; 2133 } */ *ap = v; 2134 PUFFS_MSG_VARS(vn, advlock); 2135 struct vnode *vp = ap->a_vp; 2136 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2137 int error; 2138 2139 PUFFS_MSG_ALLOC(vn, advlock); 2140 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2141 if (error) 2142 goto out; 2143 advlock_msg->pvnr_id = ap->a_id; 2144 advlock_msg->pvnr_op = ap->a_op; 2145 advlock_msg->pvnr_flags = ap->a_flags; 2146 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2147 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2148 2149 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2150 error = checkerr(pmp, error, __func__); 2151 2152 out: 2153 PUFFS_MSG_RELEASE(advlock); 2154 return error; 2155 } 2156 2157 int 2158 puffs_vnop_abortop(void *v) 2159 { 2160 struct vop_abortop_args /* { 2161 struct vnode *a_dvp; 2162 struct componentname *a_cnp; 2163 }; */ *ap = v; 2164 PUFFS_MSG_VARS(vn, abortop); 2165 struct vnode *dvp = ap->a_dvp; 2166 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2167 struct componentname *cnp = ap->a_cnp; 2168 2169 if (EXISTSOP(pmp, ABORTOP)) { 2170 PUFFS_MSG_ALLOC(vn, abortop); 2171 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2172 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2173 puffs_msg_setfaf(park_abortop); 2174 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2175 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2176 2177 puffs_msg_enqueue(pmp, park_abortop); 2178 PUFFS_MSG_RELEASE(abortop); 2179 } 2180 2181 return genfs_abortop(v); 2182 } 2183 2184 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2185 2186 /* 2187 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2188 */ 2189 int 2190 puffs_vnop_strategy(void *v) 2191 { 2192 struct vop_strategy_args /* { 2193 const struct vnodeop_desc *a_desc; 2194 struct vnode *a_vp; 2195 struct buf *a_bp; 2196 } */ *ap = v; 2197 PUFFS_MSG_VARS(vn, rw); 2198 struct vnode *vp = ap->a_vp; 2199 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2200 struct puffs_node *pn; 2201 struct buf *bp; 2202 size_t argsize; 2203 size_t tomove, moved; 2204 int error, dofaf, dobiodone; 2205 2206 pmp = MPTOPUFFSMP(vp->v_mount); 2207 bp = ap->a_bp; 2208 error = 0; 2209 dofaf = 0; 2210 pn = VPTOPP(vp); 2211 park_rw = NULL; /* explicit */ 2212 dobiodone = 1; 2213 2214 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2215 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2216 ERROUT(EOPNOTSUPP); 2217 2218 /* 2219 * Short-circuit optimization: don't flush buffer in between 2220 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2221 */ 2222 if (pn->pn_stat & PNODE_DYING) { 2223 KASSERT(BUF_ISWRITE(bp)); 2224 bp->b_resid = 0; 2225 goto out; 2226 } 2227 2228 #ifdef DIAGNOSTIC 2229 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2230 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2231 bp->b_bcount); 2232 #endif 2233 2234 /* 2235 * See explanation for the necessity of a FAF in puffs_fsync. 2236 * 2237 * Also, do FAF in case we're suspending. 2238 * See puffs_vfsops.c:pageflush() 2239 */ 2240 if (BUF_ISWRITE(bp)) { 2241 mutex_enter(&vp->v_interlock); 2242 if (vp->v_iflag & VI_XLOCK) 2243 dofaf = 1; 2244 if (pn->pn_stat & PNODE_FAF) 2245 dofaf = 1; 2246 mutex_exit(&vp->v_interlock); 2247 } 2248 2249 #ifdef DIAGNOSTIC 2250 if (curlwp == uvm.pagedaemon_lwp) 2251 KASSERT(dofaf || BIOASYNC(bp)); 2252 #endif 2253 2254 /* allocate transport structure */ 2255 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2256 argsize = sizeof(struct puffs_vnmsg_rw); 2257 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2258 (void *)&rw_msg, dofaf ? 0 : 1); 2259 if (error) 2260 goto out; 2261 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2262 2263 /* 2x2 cases: read/write, faf/nofaf */ 2264 if (BUF_ISREAD(bp)) { 2265 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2266 PUFFS_VN_READ, VPTOPNC(vp)); 2267 puffs_msg_setdelta(park_rw, tomove); 2268 if (BIOASYNC(bp)) { 2269 puffs_msg_setcall(park_rw, 2270 puffs_parkdone_asyncbioread, bp); 2271 puffs_msg_enqueue(pmp, park_rw); 2272 dobiodone = 0; 2273 } else { 2274 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2275 NULL, error); 2276 error = checkerr(pmp, error, __func__); 2277 if (error) 2278 goto out; 2279 2280 if (rw_msg->pvnr_resid > tomove) { 2281 puffs_senderr(pmp, PUFFS_ERR_READ, 2282 E2BIG, "resid grew", VPTOPNC(vp)); 2283 ERROUT(EPROTO); 2284 } 2285 2286 moved = tomove - rw_msg->pvnr_resid; 2287 2288 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2289 bp->b_resid = bp->b_bcount - moved; 2290 } 2291 } else { 2292 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2293 PUFFS_VN_WRITE, VPTOPNC(vp)); 2294 /* 2295 * make pages read-only before we write them if we want 2296 * write caching info 2297 */ 2298 if (PUFFS_WCACHEINFO(pmp)) { 2299 struct uvm_object *uobj = &vp->v_uobj; 2300 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2301 struct vm_page *vmp; 2302 int i; 2303 2304 for (i = 0; i < npages; i++) { 2305 vmp= uvm_pageratop((vaddr_t)bp->b_data 2306 + (i << PAGE_SHIFT)); 2307 DPRINTF(("puffs_strategy: write-protecting " 2308 "vp %p page %p, offset %" PRId64"\n", 2309 vp, vmp, vmp->offset)); 2310 mutex_enter(&uobj->vmobjlock); 2311 vmp->flags |= PG_RDONLY; 2312 pmap_page_protect(vmp, VM_PROT_READ); 2313 mutex_exit(&uobj->vmobjlock); 2314 } 2315 } 2316 2317 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2318 if (dofaf) { 2319 puffs_msg_setfaf(park_rw); 2320 } else if (BIOASYNC(bp)) { 2321 puffs_msg_setcall(park_rw, 2322 puffs_parkdone_asyncbiowrite, bp); 2323 dobiodone = 0; 2324 } 2325 2326 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2327 2328 if (dobiodone == 0) 2329 goto out; 2330 2331 /* 2332 * XXXXXXXX: wrong, but kernel can't survive strategy 2333 * failure currently. Here, have one more X: X. 2334 */ 2335 if (error != ENOMEM) 2336 error = 0; 2337 2338 error = checkerr(pmp, error, __func__); 2339 if (error) 2340 goto out; 2341 2342 if (rw_msg->pvnr_resid > tomove) { 2343 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2344 E2BIG, "resid grew", VPTOPNC(vp)); 2345 ERROUT(EPROTO); 2346 } 2347 2348 /* 2349 * FAF moved everything. Frankly, we don't 2350 * really have a choice. 2351 */ 2352 if (dofaf && error == 0) 2353 moved = tomove; 2354 else 2355 moved = tomove - rw_msg->pvnr_resid; 2356 2357 bp->b_resid = bp->b_bcount - moved; 2358 if (bp->b_resid != 0) { 2359 ERROUT(EIO); 2360 } 2361 } 2362 2363 out: 2364 if (park_rw) 2365 puffs_msgmem_release(park_rw); 2366 2367 if (error) 2368 bp->b_error = error; 2369 2370 if (error || dobiodone) 2371 biodone(bp); 2372 2373 return error; 2374 } 2375 2376 int 2377 puffs_vnop_mmap(void *v) 2378 { 2379 struct vop_mmap_args /* { 2380 const struct vnodeop_desc *a_desc; 2381 struct vnode *a_vp; 2382 vm_prot_t a_prot; 2383 kauth_cred_t a_cred; 2384 } */ *ap = v; 2385 PUFFS_MSG_VARS(vn, mmap); 2386 struct vnode *vp = ap->a_vp; 2387 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2388 int error; 2389 2390 if (!PUFFS_USE_PAGECACHE(pmp)) 2391 return genfs_eopnotsupp(v); 2392 2393 if (EXISTSOP(pmp, MMAP)) { 2394 PUFFS_MSG_ALLOC(vn, mmap); 2395 mmap_msg->pvnr_prot = ap->a_prot; 2396 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2397 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2398 PUFFS_VN_MMAP, VPTOPNC(vp)); 2399 2400 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2401 error = checkerr(pmp, error, __func__); 2402 PUFFS_MSG_RELEASE(mmap); 2403 } else { 2404 error = genfs_mmap(v); 2405 } 2406 2407 return error; 2408 } 2409 2410 2411 /* 2412 * The rest don't get a free trip to userspace and back, they 2413 * have to stay within the kernel. 2414 */ 2415 2416 /* 2417 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2418 * well, maybe somehow, somewhere, some day .... 2419 */ 2420 int 2421 puffs_vnop_bmap(void *v) 2422 { 2423 struct vop_bmap_args /* { 2424 const struct vnodeop_desc *a_desc; 2425 struct vnode *a_vp; 2426 daddr_t a_bn; 2427 struct vnode **a_vpp; 2428 daddr_t *a_bnp; 2429 int *a_runp; 2430 } */ *ap = v; 2431 struct puffs_mount *pmp; 2432 2433 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2434 2435 if (ap->a_vpp) 2436 *ap->a_vpp = ap->a_vp; 2437 if (ap->a_bnp) 2438 *ap->a_bnp = ap->a_bn; 2439 if (ap->a_runp) 2440 *ap->a_runp 2441 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2442 2443 return 0; 2444 } 2445 2446 /* 2447 * Handle getpages faults in puffs. We let genfs_getpages() do most 2448 * of the dirty work, but we come in this route to do accounting tasks. 2449 * If the user server has specified functions for cache notifications 2450 * about reads and/or writes, we record which type of operation we got, 2451 * for which page range, and proceed to issue a FAF notification to the 2452 * server about it. 2453 */ 2454 int 2455 puffs_vnop_getpages(void *v) 2456 { 2457 struct vop_getpages_args /* { 2458 const struct vnodeop_desc *a_desc; 2459 struct vnode *a_vp; 2460 voff_t a_offset; 2461 struct vm_page **a_m; 2462 int *a_count; 2463 int a_centeridx; 2464 vm_prot_t a_access_type; 2465 int a_advice; 2466 int a_flags; 2467 } */ *ap = v; 2468 struct puffs_mount *pmp; 2469 struct puffs_node *pn; 2470 struct vnode *vp; 2471 struct vm_page **pgs; 2472 struct puffs_cacheinfo *pcinfo = NULL; 2473 struct puffs_cacherun *pcrun; 2474 void *parkmem = NULL; 2475 size_t runsizes; 2476 int i, npages, si, streakon; 2477 int error, locked, write; 2478 2479 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2480 npages = *ap->a_count; 2481 pgs = ap->a_m; 2482 vp = ap->a_vp; 2483 pn = vp->v_data; 2484 locked = (ap->a_flags & PGO_LOCKED) != 0; 2485 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2486 2487 /* ccg xnaht - gets Wuninitialized wrong */ 2488 pcrun = NULL; 2489 runsizes = 0; 2490 2491 /* 2492 * Check that we aren't trying to fault in pages which our file 2493 * server doesn't know about. This happens if we extend a file by 2494 * skipping some pages and later try to fault in pages which 2495 * are between pn_serversize and vp_size. This check optimizes 2496 * away the common case where a file is being extended. 2497 */ 2498 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2499 struct vattr va; 2500 2501 /* try again later when we can block */ 2502 if (locked) 2503 ERROUT(EBUSY); 2504 2505 mutex_exit(&vp->v_interlock); 2506 vattr_null(&va); 2507 va.va_size = vp->v_size; 2508 error = dosetattr(vp, &va, FSCRED, 0); 2509 if (error) 2510 ERROUT(error); 2511 mutex_enter(&vp->v_interlock); 2512 } 2513 2514 if (write && PUFFS_WCACHEINFO(pmp)) { 2515 #ifdef notnowjohn 2516 /* allocate worst-case memory */ 2517 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2518 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2519 locked ? KM_NOSLEEP : KM_SLEEP); 2520 2521 /* 2522 * can't block if we're locked and can't mess up caching 2523 * information for fs server. so come back later, please 2524 */ 2525 if (pcinfo == NULL) 2526 ERROUT(ENOMEM); 2527 2528 parkmem = puffs_park_alloc(locked == 0); 2529 if (parkmem == NULL) 2530 ERROUT(ENOMEM); 2531 2532 pcrun = pcinfo->pcache_runs; 2533 #else 2534 (void)parkmem; 2535 #endif 2536 } 2537 2538 error = genfs_getpages(v); 2539 if (error) 2540 goto out; 2541 2542 if (PUFFS_WCACHEINFO(pmp) == 0) 2543 goto out; 2544 2545 /* 2546 * Let's see whose fault it was and inform the user server of 2547 * possibly read/written pages. Map pages from read faults 2548 * strictly read-only, since otherwise we might miss info on 2549 * when the page is actually write-faulted to. 2550 */ 2551 if (!locked) 2552 mutex_enter(&vp->v_uobj.vmobjlock); 2553 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2554 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2555 if (streakon && write) { 2556 streakon = 0; 2557 pcrun[si].pcache_runend 2558 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2559 si++; 2560 } 2561 continue; 2562 } 2563 if (streakon == 0 && write) { 2564 streakon = 1; 2565 pcrun[si].pcache_runstart = pgs[i]->offset; 2566 } 2567 2568 if (!write) 2569 pgs[i]->flags |= PG_RDONLY; 2570 } 2571 /* was the last page part of our streak? */ 2572 if (streakon) { 2573 pcrun[si].pcache_runend 2574 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2575 si++; 2576 } 2577 if (!locked) 2578 mutex_exit(&vp->v_uobj.vmobjlock); 2579 2580 KASSERT(si <= (npages / 2) + 1); 2581 2582 #ifdef notnowjohn 2583 /* send results to userspace */ 2584 if (write) 2585 puffs_cacheop(pmp, parkmem, pcinfo, 2586 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2587 #endif 2588 2589 out: 2590 if (error) { 2591 if (pcinfo != NULL) 2592 kmem_free(pcinfo, 2593 sizeof(struct puffs_cacheinfo) + runsizes); 2594 #ifdef notnowjohn 2595 if (parkmem != NULL) 2596 puffs_park_release(parkmem, 1); 2597 #endif 2598 } 2599 2600 return error; 2601 } 2602 2603 /* 2604 * Extended attribute support. 2605 */ 2606 2607 int 2608 puffs_vnop_getextattr(void *v) 2609 { 2610 struct vop_getextattr_args /* 2611 struct vnode *a_vp; 2612 int a_attrnamespace; 2613 const char *a_name; 2614 struct uio *a_uio; 2615 size_t *a_size; 2616 kauth_cred_t a_cred; 2617 }; */ *ap = v; 2618 PUFFS_MSG_VARS(vn, getextattr); 2619 struct vnode *vp = ap->a_vp; 2620 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2621 int attrnamespace = ap->a_attrnamespace; 2622 const char *name = ap->a_name; 2623 struct uio *uio = ap->a_uio; 2624 size_t *sizep = ap->a_size; 2625 size_t tomove, resid; 2626 int error; 2627 2628 if (uio) 2629 resid = uio->uio_resid; 2630 else 2631 resid = 0; 2632 2633 tomove = PUFFS_TOMOVE(resid, pmp); 2634 if (tomove != resid) { 2635 error = E2BIG; 2636 goto out; 2637 } 2638 2639 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2640 &park_getextattr, (void *)&getextattr_msg, 1); 2641 2642 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2643 strlcpy(getextattr_msg->pvnr_attrname, name, 2644 sizeof(getextattr_msg->pvnr_attrname)); 2645 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2646 if (sizep) 2647 getextattr_msg->pvnr_datasize = 1; 2648 getextattr_msg->pvnr_resid = tomove; 2649 2650 puffs_msg_setinfo(park_getextattr, 2651 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2652 puffs_msg_setdelta(park_getextattr, tomove); 2653 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2654 2655 error = checkerr(pmp, error, __func__); 2656 if (error) 2657 goto out; 2658 2659 resid = getextattr_msg->pvnr_resid; 2660 if (resid > tomove) { 2661 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2662 "resid grew", VPTOPNC(vp)); 2663 error = EPROTO; 2664 goto out; 2665 } 2666 2667 if (sizep) 2668 *sizep = getextattr_msg->pvnr_datasize; 2669 if (uio) 2670 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2671 2672 out: 2673 PUFFS_MSG_RELEASE(getextattr); 2674 return error; 2675 } 2676 2677 int 2678 puffs_vnop_setextattr(void *v) 2679 { 2680 struct vop_setextattr_args /* { 2681 struct vnode *a_vp; 2682 int a_attrnamespace; 2683 const char *a_name; 2684 struct uio *a_uio; 2685 kauth_cred_t a_cred; 2686 }; */ *ap = v; 2687 PUFFS_MSG_VARS(vn, setextattr); 2688 struct vnode *vp = ap->a_vp; 2689 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2690 int attrnamespace = ap->a_attrnamespace; 2691 const char *name = ap->a_name; 2692 struct uio *uio = ap->a_uio; 2693 size_t tomove, resid; 2694 int error; 2695 2696 if (uio) 2697 resid = uio->uio_resid; 2698 else 2699 resid = 0; 2700 2701 tomove = PUFFS_TOMOVE(resid, pmp); 2702 if (tomove != resid) { 2703 error = E2BIG; 2704 goto out; 2705 } 2706 2707 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2708 &park_setextattr, (void *)&setextattr_msg, 1); 2709 2710 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2711 strlcpy(setextattr_msg->pvnr_attrname, name, 2712 sizeof(setextattr_msg->pvnr_attrname)); 2713 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2714 setextattr_msg->pvnr_resid = tomove; 2715 2716 if (uio) { 2717 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2718 if (error) 2719 goto out; 2720 } 2721 2722 puffs_msg_setinfo(park_setextattr, 2723 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 2724 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 2725 2726 error = checkerr(pmp, error, __func__); 2727 if (error) 2728 goto out; 2729 2730 if (setextattr_msg->pvnr_resid != 0) 2731 error = EIO; 2732 2733 out: 2734 PUFFS_MSG_RELEASE(setextattr); 2735 2736 return error; 2737 } 2738 2739 int 2740 puffs_vnop_listextattr(void *v) 2741 { 2742 struct vop_listextattr_args /* { 2743 struct vnode *a_vp; 2744 int a_attrnamespace; 2745 struct uio *a_uio; 2746 size_t *a_size; 2747 kauth_cred_t a_cred; 2748 }; */ *ap = v; 2749 PUFFS_MSG_VARS(vn, listextattr); 2750 struct vnode *vp = ap->a_vp; 2751 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2752 int attrnamespace = ap->a_attrnamespace; 2753 struct uio *uio = ap->a_uio; 2754 size_t *sizep = ap->a_size; 2755 size_t tomove, resid; 2756 int error; 2757 2758 if (uio) 2759 resid = uio->uio_resid; 2760 else 2761 resid = 0; 2762 2763 tomove = PUFFS_TOMOVE(resid, pmp); 2764 if (tomove != resid) { 2765 error = E2BIG; 2766 goto out; 2767 } 2768 2769 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 2770 &park_listextattr, (void *)&listextattr_msg, 1); 2771 2772 listextattr_msg->pvnr_attrnamespace = attrnamespace; 2773 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 2774 listextattr_msg->pvnr_resid = tomove; 2775 if (sizep) 2776 listextattr_msg->pvnr_datasize = 1; 2777 2778 puffs_msg_setinfo(park_listextattr, 2779 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 2780 puffs_msg_setdelta(park_listextattr, tomove); 2781 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 2782 2783 error = checkerr(pmp, error, __func__); 2784 if (error) 2785 goto out; 2786 2787 resid = listextattr_msg->pvnr_resid; 2788 if (resid > tomove) { 2789 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 2790 "resid grew", VPTOPNC(vp)); 2791 error = EPROTO; 2792 goto out; 2793 } 2794 2795 if (sizep) 2796 *sizep = listextattr_msg->pvnr_datasize; 2797 if (uio) 2798 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 2799 2800 out: 2801 PUFFS_MSG_RELEASE(listextattr); 2802 return error; 2803 } 2804 2805 int 2806 puffs_vnop_deleteextattr(void *v) 2807 { 2808 struct vop_deleteextattr_args /* { 2809 struct vnode *a_vp; 2810 int a_attrnamespace; 2811 const char *a_name; 2812 kauth_cred_t a_cred; 2813 }; */ *ap = v; 2814 PUFFS_MSG_VARS(vn, deleteextattr); 2815 struct vnode *vp = ap->a_vp; 2816 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2817 int attrnamespace = ap->a_attrnamespace; 2818 const char *name = ap->a_name; 2819 int error; 2820 2821 PUFFS_MSG_ALLOC(vn, deleteextattr); 2822 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 2823 strlcpy(deleteextattr_msg->pvnr_attrname, name, 2824 sizeof(deleteextattr_msg->pvnr_attrname)); 2825 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 2826 2827 puffs_msg_setinfo(park_deleteextattr, 2828 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 2829 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 2830 vp->v_data, NULL, error); 2831 2832 error = checkerr(pmp, error, __func__); 2833 2834 PUFFS_MSG_RELEASE(deleteextattr); 2835 return error; 2836 } 2837 2838 /* 2839 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2840 * FAF update information for the puffs node first. 2841 */ 2842 int 2843 puffs_vnop_spec_read(void *v) 2844 { 2845 struct vop_read_args /* { 2846 const struct vnodeop_desc *a_desc; 2847 struct vnode *a_vp; 2848 struct uio *a_uio; 2849 int a_ioflag; 2850 kauth_cred_t a_cred; 2851 } */ *ap = v; 2852 2853 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2854 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2855 } 2856 2857 int 2858 puffs_vnop_spec_write(void *v) 2859 { 2860 struct vop_write_args /* { 2861 const struct vnodeop_desc *a_desc; 2862 struct vnode *a_vp; 2863 struct uio *a_uio; 2864 int a_ioflag; 2865 kauth_cred_t a_cred; 2866 } */ *ap = v; 2867 2868 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2869 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2870 } 2871 2872 int 2873 puffs_vnop_fifo_read(void *v) 2874 { 2875 struct vop_read_args /* { 2876 const struct vnodeop_desc *a_desc; 2877 struct vnode *a_vp; 2878 struct uio *a_uio; 2879 int a_ioflag; 2880 kauth_cred_t a_cred; 2881 } */ *ap = v; 2882 2883 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2884 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2885 } 2886 2887 int 2888 puffs_vnop_fifo_write(void *v) 2889 { 2890 struct vop_write_args /* { 2891 const struct vnodeop_desc *a_desc; 2892 struct vnode *a_vp; 2893 struct uio *a_uio; 2894 int a_ioflag; 2895 kauth_cred_t a_cred; 2896 } */ *ap = v; 2897 2898 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2899 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2900 } 2901
Indexes created Wed Oct 01 15:09:59 GMT 2025