puffs_vnops.c revision 1.198
1 /* $NetBSD: puffs_vnops.c,v 1.198 2014/11/04 09:14:42 manu 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 1.198 2014/11/04 09:14:42 manu Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, hardclock_ticks */ 44 45 #include <uvm/uvm.h> 46 47 #include <fs/puffs/puffs_msgif.h> 48 #include <fs/puffs/puffs_sys.h> 49 50 #include <miscfs/fifofs/fifo.h> 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> 53 54 int puffs_vnop_lookup(void *); 55 int puffs_vnop_create(void *); 56 int puffs_vnop_access(void *); 57 int puffs_vnop_mknod(void *); 58 int puffs_vnop_open(void *); 59 int puffs_vnop_close(void *); 60 int puffs_vnop_getattr(void *); 61 int puffs_vnop_setattr(void *); 62 int puffs_vnop_reclaim(void *); 63 int puffs_vnop_readdir(void *); 64 int puffs_vnop_poll(void *); 65 int puffs_vnop_fsync(void *); 66 int puffs_vnop_seek(void *); 67 int puffs_vnop_remove(void *); 68 int puffs_vnop_mkdir(void *); 69 int puffs_vnop_rmdir(void *); 70 int puffs_vnop_link(void *); 71 int puffs_vnop_readlink(void *); 72 int puffs_vnop_symlink(void *); 73 int puffs_vnop_rename(void *); 74 int puffs_vnop_read(void *); 75 int puffs_vnop_write(void *); 76 int puffs_vnop_fallocate(void *); 77 int puffs_vnop_fdiscard(void *); 78 int puffs_vnop_fcntl(void *); 79 int puffs_vnop_ioctl(void *); 80 int puffs_vnop_inactive(void *); 81 int puffs_vnop_print(void *); 82 int puffs_vnop_pathconf(void *); 83 int puffs_vnop_advlock(void *); 84 int puffs_vnop_strategy(void *); 85 int puffs_vnop_bmap(void *); 86 int puffs_vnop_mmap(void *); 87 int puffs_vnop_getpages(void *); 88 int puffs_vnop_abortop(void *); 89 int puffs_vnop_getextattr(void *); 90 int puffs_vnop_setextattr(void *); 91 int puffs_vnop_listextattr(void *); 92 int puffs_vnop_deleteextattr(void *); 93 94 int puffs_vnop_spec_read(void *); 95 int puffs_vnop_spec_write(void *); 96 int puffs_vnop_fifo_read(void *); 97 int puffs_vnop_fifo_write(void *); 98 99 int puffs_vnop_checkop(void *); 100 101 #define puffs_vnop_lock genfs_lock 102 #define puffs_vnop_unlock genfs_unlock 103 #define puffs_vnop_islocked genfs_islocked 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 109 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 110 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 111 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 112 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 113 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 114 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 115 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 116 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 117 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 118 { &vop_fallocate_desc, puffs_vnop_fallocate }, /* fallocate */ 119 { &vop_fdiscard_desc, puffs_vnop_fdiscard }, /* fdiscard */ 120 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 121 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 122 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 123 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 124 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 125 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 126 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 127 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 128 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 129 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 130 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 131 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 132 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 133 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 134 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 135 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 136 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 137 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 138 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 139 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 140 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 141 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 142 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 143 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 144 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 145 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 146 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 147 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 148 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 149 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 150 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 151 #if 0 152 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 153 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 154 #endif 155 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 156 { NULL, NULL } 157 }; 158 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 159 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 160 161 162 int (**puffs_specop_p)(void *); 163 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 164 { &vop_default_desc, vn_default_error }, 165 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 166 { &vop_create_desc, spec_create }, /* genfs_badop */ 167 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 168 { &vop_open_desc, spec_open }, /* spec_open */ 169 { &vop_close_desc, spec_close }, /* spec_close */ 170 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 171 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 172 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 173 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 174 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 175 { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ 176 { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ 177 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 178 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 179 { &vop_poll_desc, spec_poll }, /* spec_poll */ 180 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 181 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 182 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 183 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 184 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 185 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 186 { &vop_link_desc, spec_link }, /* genfs_badop */ 187 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 188 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 189 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 190 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 191 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 192 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 193 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 194 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 195 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 196 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 197 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 198 { &vop_bmap_desc, spec_bmap }, /* dummy */ 199 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 200 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 201 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 202 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 203 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 204 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 205 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 206 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 207 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 208 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 209 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 210 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 211 #if 0 212 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 213 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 214 #endif 215 { NULL, NULL } 216 }; 217 const struct vnodeopv_desc puffs_specop_opv_desc = 218 { &puffs_specop_p, puffs_specop_entries }; 219 220 221 int (**puffs_fifoop_p)(void *); 222 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 223 { &vop_default_desc, vn_default_error }, 224 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 225 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 226 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 227 { &vop_open_desc, vn_fifo_bypass }, /* open */ 228 { &vop_close_desc, vn_fifo_bypass }, /* close */ 229 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 230 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 231 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 232 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 233 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 234 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ 235 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ 236 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 237 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 238 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 239 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 240 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 241 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 243 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 246 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 247 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 248 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 249 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 252 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 253 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 254 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 255 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 256 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 257 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 258 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 259 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 260 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 261 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 262 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 263 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 264 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 265 #if 0 266 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 267 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 268 #endif 269 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 270 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 271 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 272 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 273 { NULL, NULL } 274 }; 275 const struct vnodeopv_desc puffs_fifoop_opv_desc = 276 { &puffs_fifoop_p, puffs_fifoop_entries }; 277 278 279 /* "real" vnode operations */ 280 int (**puffs_msgop_p)(void *); 281 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 282 { &vop_default_desc, vn_default_error }, 283 { &vop_create_desc, puffs_vnop_create }, /* create */ 284 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 285 { &vop_open_desc, puffs_vnop_open }, /* open */ 286 { &vop_close_desc, puffs_vnop_close }, /* close */ 287 { &vop_access_desc, puffs_vnop_access }, /* access */ 288 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 289 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 290 { &vop_read_desc, puffs_vnop_read }, /* read */ 291 { &vop_write_desc, puffs_vnop_write }, /* write */ 292 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 293 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 294 { &vop_link_desc, puffs_vnop_link }, /* link */ 295 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 296 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 297 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 298 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 299 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 300 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 301 { &vop_print_desc, puffs_vnop_print }, /* print */ 302 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 303 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 304 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 305 { NULL, NULL } 306 }; 307 const struct vnodeopv_desc puffs_msgop_opv_desc = 308 { &puffs_msgop_p, puffs_msgop_entries }; 309 310 /* 311 * for dosetattr / update_va 312 */ 313 #define SETATTR_CHSIZE 0x01 314 #define SETATTR_ASYNC 0x02 315 316 #define ERROUT(err) \ 317 do { \ 318 error = err; \ 319 goto out; \ 320 } while (/*CONSTCOND*/0) 321 322 /* 323 * This is a generic vnode operation handler. It checks if the necessary 324 * operations for the called vnode operation are implemented by userspace 325 * and either returns a dummy return value or proceeds to call the real 326 * vnode operation from puffs_msgop_v. 327 * 328 * XXX: this should described elsewhere and autogenerated, the complexity 329 * of the vnode operations vectors and their interrelationships is also 330 * getting a bit out of hand. Another problem is that we need this same 331 * information in the fs server code, so keeping the two in sync manually 332 * is not a viable (long term) plan. 333 */ 334 335 /* not supported, handle locking protocol */ 336 #define CHECKOP_NOTSUPP(op) \ 337 case VOP_##op##_DESCOFFSET: \ 338 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 339 return genfs_eopnotsupp(v); \ 340 break 341 342 /* always succeed, no locking */ 343 #define CHECKOP_SUCCESS(op) \ 344 case VOP_##op##_DESCOFFSET: \ 345 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 346 return 0; \ 347 break 348 349 int 350 puffs_vnop_checkop(void *v) 351 { 352 struct vop_generic_args /* { 353 struct vnodeop_desc *a_desc; 354 spooky mystery contents; 355 } */ *ap = v; 356 struct vnodeop_desc *desc = ap->a_desc; 357 struct puffs_mount *pmp; 358 struct vnode *vp; 359 int offset, rv; 360 361 offset = ap->a_desc->vdesc_vp_offsets[0]; 362 #ifdef DIAGNOSTIC 363 if (offset == VDESC_NO_OFFSET) 364 panic("puffs_checkop: no vnode, why did you call me?"); 365 #endif 366 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 367 pmp = MPTOPUFFSMP(vp->v_mount); 368 369 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 370 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 371 372 if (!ALLOPS(pmp)) { 373 switch (desc->vdesc_offset) { 374 CHECKOP_NOTSUPP(CREATE); 375 CHECKOP_NOTSUPP(MKNOD); 376 CHECKOP_NOTSUPP(GETATTR); 377 CHECKOP_NOTSUPP(SETATTR); 378 CHECKOP_NOTSUPP(READ); 379 CHECKOP_NOTSUPP(WRITE); 380 CHECKOP_NOTSUPP(FCNTL); 381 CHECKOP_NOTSUPP(IOCTL); 382 CHECKOP_NOTSUPP(REMOVE); 383 CHECKOP_NOTSUPP(LINK); 384 CHECKOP_NOTSUPP(RENAME); 385 CHECKOP_NOTSUPP(MKDIR); 386 CHECKOP_NOTSUPP(RMDIR); 387 CHECKOP_NOTSUPP(SYMLINK); 388 CHECKOP_NOTSUPP(READDIR); 389 CHECKOP_NOTSUPP(READLINK); 390 CHECKOP_NOTSUPP(PRINT); 391 CHECKOP_NOTSUPP(PATHCONF); 392 CHECKOP_NOTSUPP(GETEXTATTR); 393 CHECKOP_NOTSUPP(SETEXTATTR); 394 CHECKOP_NOTSUPP(LISTEXTATTR); 395 CHECKOP_NOTSUPP(DELETEEXTATTR); 396 397 CHECKOP_SUCCESS(ACCESS); 398 CHECKOP_SUCCESS(CLOSE); 399 CHECKOP_SUCCESS(SEEK); 400 401 case VOP_GETPAGES_DESCOFFSET: 402 if (!EXISTSOP(pmp, READ)) 403 return genfs_eopnotsupp(v); 404 break; 405 406 default: 407 panic("puffs_checkop: unhandled vnop %d", 408 desc->vdesc_offset); 409 } 410 } 411 412 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 413 414 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 415 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 416 417 return rv; 418 } 419 420 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 421 struct componentname *); 422 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 423 struct componentname *); 424 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 425 static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); 426 static int flushvncache(struct vnode *, off_t, off_t, bool); 427 static void update_va(struct vnode *, struct vattr *, struct vattr *, 428 struct timespec *, struct timespec *, int); 429 static void update_parent(struct vnode *, struct vnode *); 430 431 432 #define PUFFS_ABORT_LOOKUP 1 433 #define PUFFS_ABORT_CREATE 2 434 #define PUFFS_ABORT_MKNOD 3 435 #define PUFFS_ABORT_MKDIR 4 436 #define PUFFS_ABORT_SYMLINK 5 437 438 /* 439 * Press the pani^Wabort button! Kernel resource allocation failed. 440 */ 441 static void 442 puffs_abortbutton(struct puffs_mount *pmp, int what, 443 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 444 { 445 446 switch (what) { 447 case PUFFS_ABORT_CREATE: 448 case PUFFS_ABORT_MKNOD: 449 case PUFFS_ABORT_SYMLINK: 450 callremove(pmp, dck, ck, cnp); 451 break; 452 case PUFFS_ABORT_MKDIR: 453 callrmdir(pmp, dck, ck, cnp); 454 break; 455 } 456 457 callinactive(pmp, ck, 0); 458 callreclaim(pmp, ck, 1); 459 } 460 461 /* 462 * Begin vnode operations. 463 * 464 * A word from the keymaster about locks: generally we don't want 465 * to use the vnode locks at all: it creates an ugly dependency between 466 * the userlandia file server and the kernel. But we'll play along with 467 * the kernel vnode locks for now. However, even currently we attempt 468 * to release locks as early as possible. This is possible for some 469 * operations which a) don't need a locked vnode after the userspace op 470 * and b) return with the vnode unlocked. Theoretically we could 471 * unlock-do op-lock for others and order the graph in userspace, but I 472 * don't want to think of the consequences for the time being. 473 */ 474 475 #define TTL_TO_TIMEOUT(ts) \ 476 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 477 #define TTL_VALID(ts) \ 478 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 479 #define TIMED_OUT(expire) \ 480 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 481 int 482 puffs_vnop_lookup(void *v) 483 { 484 struct vop_lookup_v2_args /* { 485 const struct vnodeop_desc *a_desc; 486 struct vnode *a_dvp; 487 struct vnode **a_vpp; 488 struct componentname *a_cnp; 489 } */ *ap = v; 490 PUFFS_MSG_VARS(vn, lookup); 491 struct puffs_mount *pmp; 492 struct componentname *cnp; 493 struct vnode *vp, *dvp, *cvp; 494 struct puffs_node *dpn, *cpn; 495 int isdot; 496 int error; 497 498 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 499 cnp = ap->a_cnp; 500 dvp = ap->a_dvp; 501 cvp = NULL; 502 cpn = NULL; 503 *ap->a_vpp = NULL; 504 505 /* r/o fs? we check create later to handle EEXIST */ 506 if ((cnp->cn_flags & ISLASTCN) 507 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 508 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 509 return EROFS; 510 511 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 512 513 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 514 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 515 516 /* 517 * If dotdot cache is enabled, add reference to .. and return. 518 */ 519 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 520 vp = VPTOPP(ap->a_dvp)->pn_parent; 521 vref(vp); 522 523 *ap->a_vpp = vp; 524 return 0; 525 } 526 527 /* 528 * Check if someone fed it into the cache 529 */ 530 if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 531 int found, iswhiteout; 532 533 found = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 534 cnp->cn_nameiop, cnp->cn_flags, 535 &iswhiteout, ap->a_vpp); 536 if (iswhiteout) { 537 cnp->cn_flags |= ISWHITEOUT; 538 } 539 540 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 541 cvp = *ap->a_vpp; 542 cpn = VPTOPP(cvp); 543 544 if (TIMED_OUT(cpn->pn_cn_timeout)) { 545 cache_purge(cvp); 546 /* 547 * cached vnode (cvp) is still referenced 548 * so that we can reuse it upon a new 549 * successful lookup. 550 */ 551 *ap->a_vpp = NULL; 552 found = 0; 553 } 554 } 555 556 /* 557 * Do not use negative caching, since the filesystem 558 * provides no TTL for it. 559 */ 560 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 561 found = 0; 562 563 if (found) { 564 return *ap->a_vpp == NULLVP ? ENOENT : 0; 565 } 566 567 /* 568 * This is what would have been left in ERROR before 569 * the rearrangement of cache_lookup(). What with all 570 * the macros, I am not sure if this is a dead value 571 * below or not. 572 */ 573 error = -1; 574 } 575 576 if (isdot) { 577 /* deal with rename lookup semantics */ 578 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 579 return EISDIR; 580 581 vp = ap->a_dvp; 582 vref(vp); 583 *ap->a_vpp = vp; 584 return 0; 585 } 586 587 if (cvp != NULL) { 588 if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { 589 vrele(cvp); 590 cvp = NULL; 591 } else 592 mutex_enter(&cpn->pn_sizemtx); 593 } 594 595 PUFFS_MSG_ALLOC(vn, lookup); 596 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 597 cnp, PUFFS_USE_FULLPNBUF(pmp)); 598 599 if (cnp->cn_flags & ISDOTDOT) 600 VOP_UNLOCK(dvp); 601 602 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 603 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 604 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 605 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 606 607 /* 608 * In case of error, there is no new vnode to play with, so be 609 * happy with the NULL value given to vpp in the beginning. 610 * Also, check if this really was an error or the target was not 611 * present. Either treat it as a non-error for CREATE/RENAME or 612 * enter the component into the negative name cache (if desired). 613 */ 614 if (error) { 615 error = checkerr(pmp, error, __func__); 616 if (error == ENOENT) { 617 /* don't allow to create files on r/o fs */ 618 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 619 && cnp->cn_nameiop == CREATE) { 620 error = EROFS; 621 622 /* adjust values if we are creating */ 623 } else if ((cnp->cn_flags & ISLASTCN) 624 && (cnp->cn_nameiop == CREATE 625 || cnp->cn_nameiop == RENAME)) { 626 error = EJUSTRETURN; 627 628 /* save negative cache entry */ 629 } else { 630 if (PUFFS_USE_NAMECACHE(pmp) && 631 !PUFFS_USE_FS_TTL(pmp)) 632 cache_enter(dvp, NULL, cnp->cn_nameptr, 633 cnp->cn_namelen, cnp->cn_flags); 634 } 635 } 636 goto out; 637 } 638 639 /* 640 * Check that we don't get our parent node back, that would cause 641 * a pretty obvious deadlock. 642 */ 643 dpn = dvp->v_data; 644 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 645 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 646 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 647 error = EPROTO; 648 goto out; 649 } 650 651 /* 652 * Check if we looked up the cached vnode 653 */ 654 vp = NULL; 655 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 656 int grace; 657 658 /* 659 * Bump grace time of this node so that it does not get 660 * reclaimed too fast. We try to increase a bit more the 661 * lifetime of busiest * nodes - with some limits. 662 */ 663 grace = 10 * puffs_sopreq_expire_timeout; 664 cpn->pn_cn_grace = hardclock_ticks + grace; 665 vp = cvp; 666 } 667 668 /* 669 * No cached vnode available, or the cached vnode does not 670 * match the userland cookie anymore: is the node known? 671 */ 672 if (vp == NULL) { 673 error = puffs_getvnode(dvp->v_mount, 674 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 675 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 676 if (error) { 677 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 678 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 679 ap->a_cnp); 680 goto out; 681 } 682 683 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 684 } 685 686 /* 687 * Update cache and TTL 688 */ 689 if (PUFFS_USE_FS_TTL(pmp)) { 690 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 691 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 692 update_va(vp, NULL, &lookup_msg->pvnr_va, 693 va_ttl, cn_ttl, SETATTR_CHSIZE); 694 } 695 696 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 697 *ap->a_vpp = vp; 698 699 if (PUFFS_USE_NAMECACHE(pmp)) 700 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 701 cnp->cn_flags); 702 703 /* XXX */ 704 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 705 cnp->cn_flags &= ~REQUIREDIR; 706 if (lookup_msg->pvnr_cn.pkcn_consume) 707 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 708 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 709 710 VPTOPP(vp)->pn_nlookup++; 711 712 if (PUFFS_USE_DOTDOTCACHE(pmp) && 713 (VPTOPP(vp)->pn_parent != dvp)) 714 update_parent(vp, dvp); 715 716 out: 717 if (cvp != NULL) { 718 mutex_exit(&cpn->pn_sizemtx); 719 720 if (error || (cvp != vp)) 721 vput(cvp); 722 } 723 if (error == 0) 724 VOP_UNLOCK(*ap->a_vpp); 725 726 if (cnp->cn_flags & ISDOTDOT) 727 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 728 729 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 730 PUFFS_MSG_RELEASE(lookup); 731 return error; 732 } 733 734 #define REFPN_AND_UNLOCKVP(a, b) \ 735 do { \ 736 mutex_enter(&b->pn_mtx); \ 737 puffs_referencenode(b); \ 738 mutex_exit(&b->pn_mtx); \ 739 VOP_UNLOCK(a); \ 740 } while (/*CONSTCOND*/0) 741 742 #define REFPN(b) \ 743 do { \ 744 mutex_enter(&b->pn_mtx); \ 745 puffs_referencenode(b); \ 746 mutex_exit(&b->pn_mtx); \ 747 } while (/*CONSTCOND*/0) 748 749 #define RELEPN_AND_VP(a, b) \ 750 do { \ 751 puffs_releasenode(b); \ 752 vrele(a); \ 753 } while (/*CONSTCOND*/0) 754 755 int 756 puffs_vnop_create(void *v) 757 { 758 struct vop_create_v3_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_dvp; 761 struct vnode **a_vpp; 762 struct componentname *a_cnp; 763 struct vattr *a_vap; 764 } */ *ap = v; 765 PUFFS_MSG_VARS(vn, create); 766 struct vnode *dvp = ap->a_dvp; 767 struct puffs_node *dpn = VPTOPP(dvp); 768 struct componentname *cnp = ap->a_cnp; 769 struct mount *mp = dvp->v_mount; 770 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 771 int error; 772 773 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 774 dvp, ap->a_cnp->cn_nameptr)); 775 776 PUFFS_MSG_ALLOC(vn, create); 777 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 778 cnp, PUFFS_USE_FULLPNBUF(pmp)); 779 create_msg->pvnr_va = *ap->a_vap; 780 puffs_msg_setinfo(park_create, PUFFSOP_VN, 781 PUFFS_VN_CREATE, VPTOPNC(dvp)); 782 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 783 784 error = checkerr(pmp, error, __func__); 785 if (error) 786 goto out; 787 788 error = puffs_newnode(mp, dvp, ap->a_vpp, 789 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 790 if (error) { 791 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 792 create_msg->pvnr_newnode, cnp); 793 goto out; 794 } 795 796 if (PUFFS_USE_FS_TTL(pmp)) { 797 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 798 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 799 struct vattr *rvap = &create_msg->pvnr_va; 800 801 update_va(*ap->a_vpp, NULL, rvap, 802 va_ttl, cn_ttl, SETATTR_CHSIZE); 803 } 804 805 VPTOPP(*ap->a_vpp)->pn_nlookup++; 806 807 if (PUFFS_USE_DOTDOTCACHE(pmp) && 808 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 809 update_parent(*ap->a_vpp, dvp); 810 811 out: 812 DPRINTF(("puffs_create: return %d\n", error)); 813 PUFFS_MSG_RELEASE(create); 814 return error; 815 } 816 817 int 818 puffs_vnop_mknod(void *v) 819 { 820 struct vop_mknod_v3_args /* { 821 const struct vnodeop_desc *a_desc; 822 struct vnode *a_dvp; 823 struct vnode **a_vpp; 824 struct componentname *a_cnp; 825 struct vattr *a_vap; 826 } */ *ap = v; 827 PUFFS_MSG_VARS(vn, mknod); 828 struct vnode *dvp = ap->a_dvp; 829 struct puffs_node *dpn = VPTOPP(dvp); 830 struct componentname *cnp = ap->a_cnp; 831 struct mount *mp = dvp->v_mount; 832 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 833 int error; 834 835 PUFFS_MSG_ALLOC(vn, mknod); 836 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 837 cnp, PUFFS_USE_FULLPNBUF(pmp)); 838 mknod_msg->pvnr_va = *ap->a_vap; 839 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 840 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 841 842 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 843 844 error = checkerr(pmp, error, __func__); 845 if (error) 846 goto out; 847 848 error = puffs_newnode(mp, dvp, ap->a_vpp, 849 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 850 ap->a_vap->va_rdev); 851 if (error) { 852 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 853 mknod_msg->pvnr_newnode, cnp); 854 goto out; 855 } 856 857 if (PUFFS_USE_FS_TTL(pmp)) { 858 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 859 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 860 struct vattr *rvap = &mknod_msg->pvnr_va; 861 862 update_va(*ap->a_vpp, NULL, rvap, 863 va_ttl, cn_ttl, SETATTR_CHSIZE); 864 } 865 866 VPTOPP(*ap->a_vpp)->pn_nlookup++; 867 868 if (PUFFS_USE_DOTDOTCACHE(pmp) && 869 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 870 update_parent(*ap->a_vpp, dvp); 871 872 out: 873 PUFFS_MSG_RELEASE(mknod); 874 return error; 875 } 876 877 int 878 puffs_vnop_open(void *v) 879 { 880 struct vop_open_args /* { 881 const struct vnodeop_desc *a_desc; 882 struct vnode *a_vp; 883 int a_mode; 884 kauth_cred_t a_cred; 885 } */ *ap = v; 886 PUFFS_MSG_VARS(vn, open); 887 struct vnode *vp = ap->a_vp; 888 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 889 struct puffs_node *pn = VPTOPP(vp); 890 int mode = ap->a_mode; 891 int error; 892 893 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 894 895 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 896 ERROUT(EROFS); 897 898 if (!EXISTSOP(pmp, OPEN)) 899 ERROUT(0); 900 901 PUFFS_MSG_ALLOC(vn, open); 902 open_msg->pvnr_mode = mode; 903 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 904 puffs_msg_setinfo(park_open, PUFFSOP_VN, 905 PUFFS_VN_OPEN, VPTOPNC(vp)); 906 907 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 908 error = checkerr(pmp, error, __func__); 909 910 if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { 911 /* 912 * Flush cache: 913 * - we do not want to discard cached write by direct write 914 * - read cache is now useless and should be freed 915 */ 916 flushvncache(vp, 0, 0, true); 917 if (mode & FREAD) 918 pn->pn_stat |= PNODE_RDIRECT; 919 if (mode & FWRITE) 920 pn->pn_stat |= PNODE_WDIRECT; 921 } 922 out: 923 DPRINTF(("puffs_open: returning %d\n", error)); 924 PUFFS_MSG_RELEASE(open); 925 return error; 926 } 927 928 int 929 puffs_vnop_close(void *v) 930 { 931 struct vop_close_args /* { 932 const struct vnodeop_desc *a_desc; 933 struct vnode *a_vp; 934 int a_fflag; 935 kauth_cred_t a_cred; 936 } */ *ap = v; 937 PUFFS_MSG_VARS(vn, close); 938 struct vnode *vp = ap->a_vp; 939 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 940 941 PUFFS_MSG_ALLOC(vn, close); 942 puffs_msg_setfaf(park_close); 943 close_msg->pvnr_fflag = ap->a_fflag; 944 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 945 puffs_msg_setinfo(park_close, PUFFSOP_VN, 946 PUFFS_VN_CLOSE, VPTOPNC(vp)); 947 948 puffs_msg_enqueue(pmp, park_close); 949 PUFFS_MSG_RELEASE(close); 950 return 0; 951 } 952 953 int 954 puffs_vnop_access(void *v) 955 { 956 struct vop_access_args /* { 957 const struct vnodeop_desc *a_desc; 958 struct vnode *a_vp; 959 int a_mode; 960 kauth_cred_t a_cred; 961 } */ *ap = v; 962 PUFFS_MSG_VARS(vn, access); 963 struct vnode *vp = ap->a_vp; 964 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 965 int mode = ap->a_mode; 966 int error; 967 968 if (mode & VWRITE) { 969 switch (vp->v_type) { 970 case VDIR: 971 case VLNK: 972 case VREG: 973 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 974 || !EXISTSOP(pmp, WRITE)) 975 return EROFS; 976 break; 977 default: 978 break; 979 } 980 } 981 982 if (!EXISTSOP(pmp, ACCESS)) 983 return 0; 984 985 PUFFS_MSG_ALLOC(vn, access); 986 access_msg->pvnr_mode = ap->a_mode; 987 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 988 puffs_msg_setinfo(park_access, PUFFSOP_VN, 989 PUFFS_VN_ACCESS, VPTOPNC(vp)); 990 991 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 992 error = checkerr(pmp, error, __func__); 993 PUFFS_MSG_RELEASE(access); 994 995 return error; 996 } 997 998 static void 999 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 1000 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 1001 { 1002 struct puffs_node *pn = VPTOPP(vp); 1003 1004 if (TTL_VALID(cn_ttl)) { 1005 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1006 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1007 } 1008 1009 /* 1010 * Don't listen to the file server regarding special device 1011 * size info, the file server doesn't know anything about them. 1012 */ 1013 if (vp->v_type == VBLK || vp->v_type == VCHR) 1014 rvap->va_size = vp->v_size; 1015 1016 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1017 if (vp->v_type == VBLK) 1018 rvap->va_blocksize = BLKDEV_IOSIZE; 1019 else if (vp->v_type == VCHR) 1020 rvap->va_blocksize = MAXBSIZE; 1021 1022 if (vap != NULL) { 1023 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1024 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1025 1026 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1027 vap->va_atime = pn->pn_mc_atime; 1028 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1029 vap->va_ctime = pn->pn_mc_ctime; 1030 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1031 vap->va_mtime = pn->pn_mc_mtime; 1032 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1033 vap->va_size = pn->pn_mc_size; 1034 } 1035 1036 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1037 if (rvap->va_size != VNOVAL 1038 && vp->v_type != VBLK && vp->v_type != VCHR) { 1039 uvm_vnp_setsize(vp, rvap->va_size); 1040 pn->pn_serversize = rvap->va_size; 1041 } 1042 } 1043 1044 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1045 if (pn->pn_va_cache == NULL) 1046 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1047 1048 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1049 1050 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1051 } 1052 } 1053 1054 static void 1055 update_parent(struct vnode *vp, struct vnode *dvp) 1056 { 1057 struct puffs_node *pn = VPTOPP(vp); 1058 1059 if (pn->pn_parent != NULL) { 1060 KASSERT(pn->pn_parent != dvp); 1061 vrele(pn->pn_parent); 1062 } 1063 1064 vref(dvp); 1065 pn->pn_parent = dvp; 1066 } 1067 1068 int 1069 puffs_vnop_getattr(void *v) 1070 { 1071 struct vop_getattr_args /* { 1072 const struct vnodeop_desc *a_desc; 1073 struct vnode *a_vp; 1074 struct vattr *a_vap; 1075 kauth_cred_t a_cred; 1076 } */ *ap = v; 1077 PUFFS_MSG_VARS(vn, getattr); 1078 struct vnode *vp = ap->a_vp; 1079 struct mount *mp = vp->v_mount; 1080 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1081 struct vattr *vap, *rvap; 1082 struct puffs_node *pn = VPTOPP(vp); 1083 struct timespec *va_ttl = NULL; 1084 int error = 0; 1085 1086 /* 1087 * A lock is required so that we do not race with 1088 * setattr, write and fsync when changing vp->v_size. 1089 * This is critical, since setting a stall smaler value 1090 * triggers a file truncate in uvm_vnp_setsize(), which 1091 * most of the time means data corruption (a chunk of 1092 * data is replaced by zeroes). This can be removed if 1093 * we decide one day that VOP_GETATTR must operate on 1094 * a locked vnode. 1095 * 1096 * XXX Should be useless now that VOP_GETATTR has been 1097 * fixed to always require a shared lock at least. 1098 */ 1099 mutex_enter(&pn->pn_sizemtx); 1100 1101 REFPN(pn); 1102 vap = ap->a_vap; 1103 1104 if (PUFFS_USE_FS_TTL(pmp)) { 1105 if (!TIMED_OUT(pn->pn_va_timeout)) { 1106 update_va(vp, vap, pn->pn_va_cache, 1107 NULL, NULL, SETATTR_CHSIZE); 1108 goto out2; 1109 } 1110 } 1111 1112 PUFFS_MSG_ALLOC(vn, getattr); 1113 vattr_null(&getattr_msg->pvnr_va); 1114 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1115 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1116 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1117 1118 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1119 error = checkerr(pmp, error, __func__); 1120 if (error) 1121 goto out; 1122 1123 rvap = &getattr_msg->pvnr_va; 1124 1125 if (PUFFS_USE_FS_TTL(pmp)) 1126 va_ttl = &getattr_msg->pvnr_va_ttl; 1127 1128 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1129 1130 out: 1131 PUFFS_MSG_RELEASE(getattr); 1132 1133 out2: 1134 puffs_releasenode(pn); 1135 1136 mutex_exit(&pn->pn_sizemtx); 1137 1138 return error; 1139 } 1140 1141 static void 1142 zerofill_lastpage(struct vnode *vp, voff_t off) 1143 { 1144 char zbuf[PAGE_SIZE]; 1145 struct iovec iov; 1146 struct uio uio; 1147 vsize_t len; 1148 int error; 1149 1150 if (trunc_page(off) == off) 1151 return; 1152 1153 if (vp->v_writecount == 0) 1154 return; 1155 1156 len = round_page(off) - off; 1157 memset(zbuf, 0, len); 1158 1159 iov.iov_base = zbuf; 1160 iov.iov_len = len; 1161 UIO_SETUP_SYSSPACE(&uio); 1162 uio.uio_iov = &iov; 1163 uio.uio_iovcnt = 1; 1164 uio.uio_offset = off; 1165 uio.uio_resid = len; 1166 uio.uio_rw = UIO_WRITE; 1167 1168 error = ubc_uiomove(&vp->v_uobj, &uio, len, 1169 UVM_ADV_SEQUENTIAL, UBC_WRITE|UBC_UNMAP_FLAG(vp)); 1170 if (error) { 1171 DPRINTF(("zero-fill 0x%" PRIxVSIZE "@0x%" PRIx64 1172 " failed: error = %d\n", len, off, error)); 1173 } 1174 1175 return; 1176 } 1177 1178 static int 1179 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1180 { 1181 PUFFS_MSG_VARS(vn, setattr); 1182 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1183 struct puffs_node *pn = vp->v_data; 1184 vsize_t oldsize = vp->v_size; 1185 int error = 0; 1186 1187 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1188 1189 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1190 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1191 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1192 || vap->va_mode != (mode_t)VNOVAL)) 1193 return EROFS; 1194 1195 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1196 && vp->v_type == VREG && vap->va_size != VNOVAL) 1197 return EROFS; 1198 1199 /* 1200 * Flush metacache first. If we are called with some explicit 1201 * parameters, treat them as information overriding metacache 1202 * information. 1203 */ 1204 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1205 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1206 && vap->va_atime.tv_sec == VNOVAL) 1207 vap->va_atime = pn->pn_mc_atime; 1208 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1209 && vap->va_ctime.tv_sec == VNOVAL) 1210 vap->va_ctime = pn->pn_mc_ctime; 1211 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1212 && vap->va_mtime.tv_sec == VNOVAL) 1213 vap->va_mtime = pn->pn_mc_mtime; 1214 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1215 && vap->va_size == VNOVAL) 1216 vap->va_size = pn->pn_mc_size; 1217 1218 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1219 } 1220 1221 /* 1222 * Flush attribute cache so that another thread do 1223 * not get a stale value during the operation. 1224 */ 1225 if (PUFFS_USE_FS_TTL(pmp)) 1226 pn->pn_va_timeout = 0; 1227 1228 PUFFS_MSG_ALLOC(vn, setattr); 1229 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1230 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1231 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1232 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1233 if (flags & SETATTR_ASYNC) 1234 puffs_msg_setfaf(park_setattr); 1235 1236 puffs_msg_enqueue(pmp, park_setattr); 1237 if ((flags & SETATTR_ASYNC) == 0) 1238 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1239 1240 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1241 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1242 struct vattr *rvap = &setattr_msg->pvnr_va; 1243 1244 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1245 } 1246 1247 PUFFS_MSG_RELEASE(setattr); 1248 if ((flags & SETATTR_ASYNC) == 0) { 1249 error = checkerr(pmp, error, __func__); 1250 if (error) 1251 return error; 1252 } else { 1253 error = 0; 1254 } 1255 1256 if (vap->va_size != VNOVAL) { 1257 /* 1258 * If we truncated the file, make sure the data beyond 1259 * EOF in last page does not remain in cache, otherwise 1260 * if the file is later truncated to a larger size (creating 1261 * a hole), that area will not return zeroes as it 1262 * should. 1263 */ 1264 if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && 1265 (vap->va_size < oldsize)) 1266 zerofill_lastpage(vp, vap->va_size); 1267 1268 pn->pn_serversize = vap->va_size; 1269 if (flags & SETATTR_CHSIZE) 1270 uvm_vnp_setsize(vp, vap->va_size); 1271 } 1272 1273 return 0; 1274 } 1275 1276 int 1277 puffs_vnop_setattr(void *v) 1278 { 1279 struct vop_getattr_args /* { 1280 const struct vnodeop_desc *a_desc; 1281 struct vnode *a_vp; 1282 struct vattr *a_vap; 1283 kauth_cred_t a_cred; 1284 } */ *ap = v; 1285 struct puffs_node *pn = ap->a_vp->v_data; 1286 int error; 1287 1288 mutex_enter(&pn->pn_sizemtx); 1289 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1290 mutex_exit(&pn->pn_sizemtx); 1291 1292 return error; 1293 } 1294 1295 static __inline int 1296 doinact(struct puffs_mount *pmp, int iaflag) 1297 { 1298 1299 if (EXISTSOP(pmp, INACTIVE)) 1300 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1301 if (iaflag || ALLOPS(pmp)) 1302 return 1; 1303 else 1304 return 0; 1305 else 1306 return 1; 1307 else 1308 return 0; 1309 } 1310 1311 static void 1312 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1313 { 1314 PUFFS_MSG_VARS(vn, inactive); 1315 1316 if (doinact(pmp, iaflag)) { 1317 PUFFS_MSG_ALLOC(vn, inactive); 1318 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1319 PUFFS_VN_INACTIVE, ck); 1320 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1321 PUFFS_MSG_RELEASE(inactive); 1322 } 1323 } 1324 1325 /* XXX: callinactive can't setback */ 1326 int 1327 puffs_vnop_inactive(void *v) 1328 { 1329 struct vop_inactive_args /* { 1330 const struct vnodeop_desc *a_desc; 1331 struct vnode *a_vp; 1332 } */ *ap = v; 1333 PUFFS_MSG_VARS(vn, inactive); 1334 struct vnode *vp = ap->a_vp; 1335 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1336 struct puffs_node *pnode; 1337 bool recycle = false; 1338 1339 /* 1340 * When puffs_cookie2vnode() misses an entry, vcache_get() 1341 * creates a new node (puffs_vfsop_loadvnode being called to 1342 * initialize the PUFFS part), then it discovers it is VNON, 1343 * and tries to vrele() it. This leads us there, while the 1344 * cookie was stall and the node likely already reclaimed. 1345 */ 1346 if (vp->v_type == VNON) { 1347 VOP_UNLOCK(vp); 1348 return 0; 1349 } 1350 1351 pnode = vp->v_data; 1352 mutex_enter(&pnode->pn_sizemtx); 1353 1354 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1355 flushvncache(vp, 0, 0, false); 1356 PUFFS_MSG_ALLOC(vn, inactive); 1357 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1358 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1359 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1360 NULL); 1361 PUFFS_MSG_RELEASE(inactive); 1362 } 1363 pnode->pn_stat &= ~PNODE_DOINACT; 1364 1365 /* 1366 * file server thinks it's gone? then don't be afraid care, 1367 * node's life was already all it would ever be 1368 */ 1369 if (pnode->pn_stat & PNODE_NOREFS) { 1370 pnode->pn_stat |= PNODE_DYING; 1371 recycle = true; 1372 } 1373 1374 /* 1375 * Handle node TTL. 1376 * If grace has already timed out, make it reclaimed. 1377 * Otherwise, we queue its expiration by sop thread, so 1378 * that it does not remain for ages in the freelist, 1379 * holding memory in userspace, while we will have 1380 * to look it up again anyway. 1381 */ 1382 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1383 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1384 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1385 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1386 1387 if (!incache && !ingrace && !reclaimqueued) { 1388 pnode->pn_stat |= PNODE_DYING; 1389 recycle = true; 1390 } 1391 1392 if (!recycle && !reclaimqueued) { 1393 struct puffs_sopreq *psopr; 1394 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1395 1396 KASSERT(curlwp != uvm.pagedaemon_lwp); 1397 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1398 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1399 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1400 psopr->psopr_at = at; 1401 1402 mutex_enter(&pmp->pmp_sopmtx); 1403 1404 /* 1405 * If thread has disapeared, just give up. The 1406 * fs is being unmounted and the node will be 1407 * be reclaimed anyway. 1408 * 1409 * Otherwise, we queue the request but do not 1410 * immediatly signal the thread, as the node 1411 * has not been expired yet. 1412 */ 1413 if (pmp->pmp_sopthrcount == 0) { 1414 kmem_free(psopr, sizeof(*psopr)); 1415 } else { 1416 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1417 psopr, psopr_entries); 1418 pnode->pn_stat |= PNODE_SOPEXP; 1419 } 1420 1421 mutex_exit(&pmp->pmp_sopmtx); 1422 } 1423 } 1424 1425 /* 1426 * Wipe direct I/O flags 1427 */ 1428 pnode->pn_stat &= ~(PNODE_RDIRECT|PNODE_WDIRECT); 1429 1430 *ap->a_recycle = recycle; 1431 1432 mutex_exit(&pnode->pn_sizemtx); 1433 VOP_UNLOCK(vp); 1434 1435 return 0; 1436 } 1437 1438 static void 1439 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1440 { 1441 PUFFS_MSG_VARS(vn, reclaim); 1442 1443 if (!EXISTSOP(pmp, RECLAIM)) 1444 return; 1445 1446 PUFFS_MSG_ALLOC(vn, reclaim); 1447 reclaim_msg->pvnr_nlookup = nlookup; 1448 puffs_msg_setfaf(park_reclaim); 1449 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1450 1451 puffs_msg_enqueue(pmp, park_reclaim); 1452 PUFFS_MSG_RELEASE(reclaim); 1453 return; 1454 } 1455 1456 /* 1457 * always FAF, we don't really care if the server wants to fail to 1458 * reclaim the node or not 1459 */ 1460 int 1461 puffs_vnop_reclaim(void *v) 1462 { 1463 struct vop_reclaim_args /* { 1464 const struct vnodeop_desc *a_desc; 1465 struct vnode *a_vp; 1466 } */ *ap = v; 1467 struct vnode *vp = ap->a_vp; 1468 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1469 bool notifyserver = true; 1470 1471 /* 1472 * first things first: check if someone is trying to reclaim the 1473 * root vnode. do not allow that to travel to userspace. 1474 * Note that we don't need to take the lock similarly to 1475 * puffs_root(), since there is only one of us. 1476 */ 1477 if (vp->v_vflag & VV_ROOT) { 1478 mutex_enter(&pmp->pmp_lock); 1479 KASSERT(pmp->pmp_root != NULL); 1480 pmp->pmp_root = NULL; 1481 mutex_exit(&pmp->pmp_lock); 1482 notifyserver = false; 1483 } 1484 1485 /* 1486 * purge info from kernel before issueing FAF, since we 1487 * don't really know when we'll get around to it after 1488 * that and someone might race us into node creation 1489 */ 1490 mutex_enter(&pmp->pmp_lock); 1491 if (PUFFS_USE_NAMECACHE(pmp)) 1492 cache_purge(vp); 1493 mutex_exit(&pmp->pmp_lock); 1494 1495 if (notifyserver) { 1496 int nlookup = VPTOPP(vp)->pn_nlookup; 1497 1498 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1499 } 1500 1501 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1502 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1503 vrele(VPTOPP(vp)->pn_parent); 1504 else 1505 KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); 1506 } 1507 1508 puffs_putvnode(vp); 1509 1510 return 0; 1511 } 1512 1513 #define CSIZE sizeof(**ap->a_cookies) 1514 int 1515 puffs_vnop_readdir(void *v) 1516 { 1517 struct vop_readdir_args /* { 1518 const struct vnodeop_desc *a_desc; 1519 struct vnode *a_vp; 1520 struct uio *a_uio; 1521 kauth_cred_t a_cred; 1522 int *a_eofflag; 1523 off_t **a_cookies; 1524 int *a_ncookies; 1525 } */ *ap = v; 1526 PUFFS_MSG_VARS(vn, readdir); 1527 struct vnode *vp = ap->a_vp; 1528 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1529 size_t argsize, tomove, cookiemem, cookiesmax; 1530 struct uio *uio = ap->a_uio; 1531 size_t howmuch, resid; 1532 int error; 1533 1534 /* 1535 * ok, so we need: resid + cookiemem = maxreq 1536 * => resid + cookiesize * (resid/minsize) = maxreq 1537 * => resid + cookiesize/minsize * resid = maxreq 1538 * => (cookiesize/minsize + 1) * resid = maxreq 1539 * => resid = maxreq / (cookiesize/minsize + 1) 1540 * 1541 * Since cookiesize <= minsize and we're not very big on floats, 1542 * we approximate that to be 1. Therefore: 1543 * 1544 * resid = maxreq / 2; 1545 * 1546 * Well, at least we didn't have to use differential equations 1547 * or the Gram-Schmidt process. 1548 * 1549 * (yes, I'm very afraid of this) 1550 */ 1551 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1552 1553 if (ap->a_cookies) { 1554 KASSERT(ap->a_ncookies != NULL); 1555 if (pmp->pmp_args.pa_fhsize == 0) 1556 return EOPNOTSUPP; 1557 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1558 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1559 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1560 } else { 1561 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1562 cookiesmax = 0; 1563 cookiemem = 0; 1564 } 1565 1566 argsize = sizeof(struct puffs_vnmsg_readdir); 1567 tomove = resid + cookiemem; 1568 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1569 (void *)&readdir_msg, 1); 1570 1571 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1572 readdir_msg->pvnr_offset = uio->uio_offset; 1573 readdir_msg->pvnr_resid = resid; 1574 readdir_msg->pvnr_ncookies = cookiesmax; 1575 readdir_msg->pvnr_eofflag = 0; 1576 readdir_msg->pvnr_dentoff = cookiemem; 1577 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1578 PUFFS_VN_READDIR, VPTOPNC(vp)); 1579 puffs_msg_setdelta(park_readdir, tomove); 1580 1581 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1582 error = checkerr(pmp, error, __func__); 1583 if (error) 1584 goto out; 1585 1586 /* userspace is cheating? */ 1587 if (readdir_msg->pvnr_resid > resid) { 1588 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1589 "resid grew", VPTOPNC(vp)); 1590 ERROUT(EPROTO); 1591 } 1592 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1593 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1594 "too many cookies", VPTOPNC(vp)); 1595 ERROUT(EPROTO); 1596 } 1597 1598 /* check eof */ 1599 if (readdir_msg->pvnr_eofflag) 1600 *ap->a_eofflag = 1; 1601 1602 /* bouncy-wouncy with the directory data */ 1603 howmuch = resid - readdir_msg->pvnr_resid; 1604 1605 /* force eof if no data was returned (getcwd() needs this) */ 1606 if (howmuch == 0) { 1607 *ap->a_eofflag = 1; 1608 goto out; 1609 } 1610 1611 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1612 if (error) 1613 goto out; 1614 1615 /* provide cookies to caller if so desired */ 1616 if (ap->a_cookies) { 1617 KASSERT(curlwp != uvm.pagedaemon_lwp); 1618 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1619 M_TEMP, M_WAITOK); 1620 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1621 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1622 *ap->a_ncookies*CSIZE); 1623 } 1624 1625 /* next readdir starts here */ 1626 uio->uio_offset = readdir_msg->pvnr_offset; 1627 1628 out: 1629 puffs_msgmem_release(park_readdir); 1630 return error; 1631 } 1632 #undef CSIZE 1633 1634 /* 1635 * poll works by consuming the bitmask in pn_revents. If there are 1636 * events available, poll returns immediately. If not, it issues a 1637 * poll to userspace, selrecords itself and returns with no available 1638 * events. When the file server returns, it executes puffs_parkdone_poll(), 1639 * where available events are added to the bitmask. selnotify() is 1640 * then also executed by that function causing us to enter here again 1641 * and hopefully find the missing bits (unless someone got them first, 1642 * in which case it starts all over again). 1643 */ 1644 int 1645 puffs_vnop_poll(void *v) 1646 { 1647 struct vop_poll_args /* { 1648 const struct vnodeop_desc *a_desc; 1649 struct vnode *a_vp; 1650 int a_events; 1651 } */ *ap = v; 1652 PUFFS_MSG_VARS(vn, poll); 1653 struct vnode *vp = ap->a_vp; 1654 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1655 struct puffs_node *pn = vp->v_data; 1656 int events; 1657 1658 if (EXISTSOP(pmp, POLL)) { 1659 mutex_enter(&pn->pn_mtx); 1660 events = pn->pn_revents & ap->a_events; 1661 if (events & ap->a_events) { 1662 pn->pn_revents &= ~ap->a_events; 1663 mutex_exit(&pn->pn_mtx); 1664 1665 return events; 1666 } else { 1667 puffs_referencenode(pn); 1668 mutex_exit(&pn->pn_mtx); 1669 1670 PUFFS_MSG_ALLOC(vn, poll); 1671 poll_msg->pvnr_events = ap->a_events; 1672 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1673 PUFFS_VN_POLL, VPTOPNC(vp)); 1674 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1675 selrecord(curlwp, &pn->pn_sel); 1676 1677 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1678 vp->v_data, NULL); 1679 PUFFS_MSG_RELEASE(poll); 1680 1681 return 0; 1682 } 1683 } else { 1684 return genfs_poll(v); 1685 } 1686 } 1687 1688 static int 1689 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1690 { 1691 struct puffs_node *pn = VPTOPP(vp); 1692 struct vattr va; 1693 int pflags, error; 1694 1695 /* flush out information from our metacache, see vop_setattr */ 1696 if (pn->pn_stat & PNODE_METACACHE_MASK 1697 && (pn->pn_stat & PNODE_DYING) == 0) { 1698 vattr_null(&va); 1699 error = dosetattr(vp, &va, FSCRED, 1700 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1701 if (error) 1702 return error; 1703 } 1704 1705 /* 1706 * flush pages to avoid being overly dirty 1707 */ 1708 pflags = PGO_CLEANIT; 1709 if (wait) 1710 pflags |= PGO_SYNCIO; 1711 1712 mutex_enter(vp->v_interlock); 1713 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1714 } 1715 1716 int 1717 puffs_vnop_fsync(void *v) 1718 { 1719 struct vop_fsync_args /* { 1720 const struct vnodeop_desc *a_desc; 1721 struct vnode *a_vp; 1722 kauth_cred_t a_cred; 1723 int a_flags; 1724 off_t a_offlo; 1725 off_t a_offhi; 1726 } */ *ap = v; 1727 PUFFS_MSG_VARS(vn, fsync); 1728 struct vnode *vp; 1729 struct puffs_node *pn; 1730 struct puffs_mount *pmp; 1731 int error, dofaf; 1732 1733 vp = ap->a_vp; 1734 KASSERT(vp != NULL); 1735 pn = VPTOPP(vp); 1736 KASSERT(pn != NULL); 1737 pmp = MPTOPUFFSMP(vp->v_mount); 1738 if (ap->a_flags & FSYNC_WAIT) { 1739 mutex_enter(&pn->pn_sizemtx); 1740 } else { 1741 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1742 return EDEADLK; 1743 } 1744 1745 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1746 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1747 if (error) 1748 goto out; 1749 1750 /* 1751 * HELLO! We exit already here if the user server does not 1752 * support fsync OR if we should call fsync for a node which 1753 * has references neither in the kernel or the fs server. 1754 * Otherwise we continue to issue fsync() forward. 1755 */ 1756 error = 0; 1757 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1758 goto out; 1759 1760 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1761 /* 1762 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1763 * only FAFs for those. Otherwise there's a danger of deadlock, 1764 * since the execution context here might be the user server 1765 * doing some operation on another fs, which in turn caused a 1766 * vnode to be reclaimed from the freelist for this fs. 1767 */ 1768 if (dofaf == 0) { 1769 mutex_enter(vp->v_interlock); 1770 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1771 dofaf = 1; 1772 mutex_exit(vp->v_interlock); 1773 } 1774 1775 PUFFS_MSG_ALLOC(vn, fsync); 1776 if (dofaf) 1777 puffs_msg_setfaf(park_fsync); 1778 1779 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1780 fsync_msg->pvnr_flags = ap->a_flags; 1781 fsync_msg->pvnr_offlo = ap->a_offlo; 1782 fsync_msg->pvnr_offhi = ap->a_offhi; 1783 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1784 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1785 1786 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1787 PUFFS_MSG_RELEASE(fsync); 1788 1789 error = checkerr(pmp, error, __func__); 1790 1791 out: 1792 mutex_exit(&pn->pn_sizemtx); 1793 return error; 1794 } 1795 1796 int 1797 puffs_vnop_seek(void *v) 1798 { 1799 struct vop_seek_args /* { 1800 const struct vnodeop_desc *a_desc; 1801 struct vnode *a_vp; 1802 off_t a_oldoff; 1803 off_t a_newoff; 1804 kauth_cred_t a_cred; 1805 } */ *ap = v; 1806 PUFFS_MSG_VARS(vn, seek); 1807 struct vnode *vp = ap->a_vp; 1808 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1809 int error; 1810 1811 PUFFS_MSG_ALLOC(vn, seek); 1812 seek_msg->pvnr_oldoff = ap->a_oldoff; 1813 seek_msg->pvnr_newoff = ap->a_newoff; 1814 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1815 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1816 PUFFS_VN_SEEK, VPTOPNC(vp)); 1817 1818 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1819 PUFFS_MSG_RELEASE(seek); 1820 return checkerr(pmp, error, __func__); 1821 } 1822 1823 static int 1824 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1825 struct componentname *cnp) 1826 { 1827 PUFFS_MSG_VARS(vn, remove); 1828 int error; 1829 1830 PUFFS_MSG_ALLOC(vn, remove); 1831 remove_msg->pvnr_cookie_targ = ck; 1832 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1833 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1834 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1835 1836 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1837 PUFFS_MSG_RELEASE(remove); 1838 1839 return checkerr(pmp, error, __func__); 1840 } 1841 1842 /* 1843 * XXX: can't use callremove now because can't catch setbacks with 1844 * it due to lack of a pnode argument. 1845 */ 1846 int 1847 puffs_vnop_remove(void *v) 1848 { 1849 struct vop_remove_args /* { 1850 const struct vnodeop_desc *a_desc; 1851 struct vnode *a_dvp; 1852 struct vnode *a_vp; 1853 struct componentname *a_cnp; 1854 } */ *ap = v; 1855 PUFFS_MSG_VARS(vn, remove); 1856 struct vnode *dvp = ap->a_dvp; 1857 struct vnode *vp = ap->a_vp; 1858 struct puffs_node *dpn = VPTOPP(dvp); 1859 struct puffs_node *pn = VPTOPP(vp); 1860 struct componentname *cnp = ap->a_cnp; 1861 struct mount *mp = dvp->v_mount; 1862 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1863 int error; 1864 1865 PUFFS_MSG_ALLOC(vn, remove); 1866 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1867 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1868 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1869 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1870 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1871 1872 puffs_msg_enqueue(pmp, park_remove); 1873 REFPN_AND_UNLOCKVP(dvp, dpn); 1874 if (dvp == vp) 1875 REFPN(pn); 1876 else 1877 REFPN_AND_UNLOCKVP(vp, pn); 1878 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1879 1880 PUFFS_MSG_RELEASE(remove); 1881 1882 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1883 1884 RELEPN_AND_VP(dvp, dpn); 1885 RELEPN_AND_VP(vp, pn); 1886 1887 error = checkerr(pmp, error, __func__); 1888 return error; 1889 } 1890 1891 int 1892 puffs_vnop_mkdir(void *v) 1893 { 1894 struct vop_mkdir_v3_args /* { 1895 const struct vnodeop_desc *a_desc; 1896 struct vnode *a_dvp; 1897 struct vnode **a_vpp; 1898 struct componentname *a_cnp; 1899 struct vattr *a_vap; 1900 } */ *ap = v; 1901 PUFFS_MSG_VARS(vn, mkdir); 1902 struct vnode *dvp = ap->a_dvp; 1903 struct puffs_node *dpn = VPTOPP(dvp); 1904 struct componentname *cnp = ap->a_cnp; 1905 struct mount *mp = dvp->v_mount; 1906 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1907 int error; 1908 1909 PUFFS_MSG_ALLOC(vn, mkdir); 1910 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1911 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1912 mkdir_msg->pvnr_va = *ap->a_vap; 1913 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1914 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1915 1916 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1917 1918 error = checkerr(pmp, error, __func__); 1919 if (error) 1920 goto out; 1921 1922 error = puffs_newnode(mp, dvp, ap->a_vpp, 1923 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1924 if (error) { 1925 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1926 mkdir_msg->pvnr_newnode, cnp); 1927 goto out; 1928 } 1929 1930 if (PUFFS_USE_FS_TTL(pmp)) { 1931 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1932 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1933 struct vattr *rvap = &mkdir_msg->pvnr_va; 1934 1935 update_va(*ap->a_vpp, NULL, rvap, 1936 va_ttl, cn_ttl, SETATTR_CHSIZE); 1937 } 1938 1939 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1940 1941 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1942 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1943 update_parent(*ap->a_vpp, dvp); 1944 1945 out: 1946 PUFFS_MSG_RELEASE(mkdir); 1947 return error; 1948 } 1949 1950 static int 1951 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1952 struct componentname *cnp) 1953 { 1954 PUFFS_MSG_VARS(vn, rmdir); 1955 int error; 1956 1957 PUFFS_MSG_ALLOC(vn, rmdir); 1958 rmdir_msg->pvnr_cookie_targ = ck; 1959 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1960 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1961 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1962 1963 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1964 PUFFS_MSG_RELEASE(rmdir); 1965 1966 return checkerr(pmp, error, __func__); 1967 } 1968 1969 int 1970 puffs_vnop_rmdir(void *v) 1971 { 1972 struct vop_rmdir_args /* { 1973 const struct vnodeop_desc *a_desc; 1974 struct vnode *a_dvp; 1975 struct vnode *a_vp; 1976 struct componentname *a_cnp; 1977 } */ *ap = v; 1978 PUFFS_MSG_VARS(vn, rmdir); 1979 struct vnode *dvp = ap->a_dvp; 1980 struct vnode *vp = ap->a_vp; 1981 struct puffs_node *dpn = VPTOPP(dvp); 1982 struct puffs_node *pn = VPTOPP(vp); 1983 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1984 struct componentname *cnp = ap->a_cnp; 1985 int error; 1986 1987 PUFFS_MSG_ALLOC(vn, rmdir); 1988 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1989 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1990 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1991 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1992 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1993 1994 puffs_msg_enqueue(pmp, park_rmdir); 1995 REFPN_AND_UNLOCKVP(dvp, dpn); 1996 REFPN_AND_UNLOCKVP(vp, pn); 1997 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1998 1999 PUFFS_MSG_RELEASE(rmdir); 2000 2001 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2002 2003 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 2004 RELEPN_AND_VP(dvp, dpn); 2005 RELEPN_AND_VP(vp, pn); 2006 2007 return error; 2008 } 2009 2010 int 2011 puffs_vnop_link(void *v) 2012 { 2013 struct vop_link_args /* { 2014 const struct vnodeop_desc *a_desc; 2015 struct vnode *a_dvp; 2016 struct vnode *a_vp; 2017 struct componentname *a_cnp; 2018 } */ *ap = v; 2019 PUFFS_MSG_VARS(vn, link); 2020 struct vnode *dvp = ap->a_dvp; 2021 struct vnode *vp = ap->a_vp; 2022 struct puffs_node *dpn = VPTOPP(dvp); 2023 struct puffs_node *pn = VPTOPP(vp); 2024 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2025 struct componentname *cnp = ap->a_cnp; 2026 int error; 2027 2028 PUFFS_MSG_ALLOC(vn, link); 2029 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 2030 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 2031 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2032 puffs_msg_setinfo(park_link, PUFFSOP_VN, 2033 PUFFS_VN_LINK, VPTOPNC(dvp)); 2034 2035 puffs_msg_enqueue(pmp, park_link); 2036 REFPN_AND_UNLOCKVP(dvp, dpn); 2037 REFPN(pn); 2038 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 2039 2040 PUFFS_MSG_RELEASE(link); 2041 2042 error = checkerr(pmp, error, __func__); 2043 2044 /* 2045 * XXX: stay in touch with the cache. I don't like this, but 2046 * don't have a better solution either. See also puffs_rename(). 2047 */ 2048 if (error == 0) { 2049 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 2050 puffs_updatenode(VPTOPP(dvp), 2051 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2052 } 2053 2054 RELEPN_AND_VP(dvp, dpn); 2055 puffs_releasenode(pn); 2056 2057 return error; 2058 } 2059 2060 int 2061 puffs_vnop_symlink(void *v) 2062 { 2063 struct vop_symlink_v3_args /* { 2064 const struct vnodeop_desc *a_desc; 2065 struct vnode *a_dvp; 2066 struct vnode **a_vpp; 2067 struct componentname *a_cnp; 2068 struct vattr *a_vap; 2069 char *a_target; 2070 } */ *ap = v; 2071 PUFFS_MSG_VARS(vn, symlink); 2072 struct vnode *dvp = ap->a_dvp; 2073 struct puffs_node *dpn = VPTOPP(dvp); 2074 struct mount *mp = dvp->v_mount; 2075 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2076 struct componentname *cnp = ap->a_cnp; 2077 int error; 2078 2079 *ap->a_vpp = NULL; 2080 2081 PUFFS_MSG_ALLOC(vn, symlink); 2082 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2083 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2084 symlink_msg->pvnr_va = *ap->a_vap; 2085 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2086 sizeof(symlink_msg->pvnr_link)); 2087 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2088 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2089 2090 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2091 2092 error = checkerr(pmp, error, __func__); 2093 if (error) 2094 goto out; 2095 2096 error = puffs_newnode(mp, dvp, ap->a_vpp, 2097 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2098 if (error) { 2099 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2100 symlink_msg->pvnr_newnode, cnp); 2101 goto out; 2102 } 2103 2104 if (PUFFS_USE_FS_TTL(pmp)) { 2105 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2106 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2107 struct vattr *rvap = &symlink_msg->pvnr_va; 2108 2109 update_va(*ap->a_vpp, NULL, rvap, 2110 va_ttl, cn_ttl, SETATTR_CHSIZE); 2111 } 2112 2113 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2114 2115 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2116 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2117 update_parent(*ap->a_vpp, dvp); 2118 2119 out: 2120 PUFFS_MSG_RELEASE(symlink); 2121 2122 return error; 2123 } 2124 2125 int 2126 puffs_vnop_readlink(void *v) 2127 { 2128 struct vop_readlink_args /* { 2129 const struct vnodeop_desc *a_desc; 2130 struct vnode *a_vp; 2131 struct uio *a_uio; 2132 kauth_cred_t a_cred; 2133 } */ *ap = v; 2134 PUFFS_MSG_VARS(vn, readlink); 2135 struct vnode *vp = ap->a_vp; 2136 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2137 size_t linklen; 2138 int error; 2139 2140 PUFFS_MSG_ALLOC(vn, readlink); 2141 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2142 linklen = sizeof(readlink_msg->pvnr_link); 2143 readlink_msg->pvnr_linklen = linklen; 2144 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2145 PUFFS_VN_READLINK, VPTOPNC(vp)); 2146 2147 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2148 error = checkerr(pmp, error, __func__); 2149 if (error) 2150 goto out; 2151 2152 /* bad bad user file server */ 2153 if (readlink_msg->pvnr_linklen > linklen) { 2154 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2155 "linklen too big", VPTOPNC(ap->a_vp)); 2156 error = EPROTO; 2157 goto out; 2158 } 2159 2160 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2161 ap->a_uio); 2162 out: 2163 PUFFS_MSG_RELEASE(readlink); 2164 return error; 2165 } 2166 2167 int 2168 puffs_vnop_rename(void *v) 2169 { 2170 struct vop_rename_args /* { 2171 const struct vnodeop_desc *a_desc; 2172 struct vnode *a_fdvp; 2173 struct vnode *a_fvp; 2174 struct componentname *a_fcnp; 2175 struct vnode *a_tdvp; 2176 struct vnode *a_tvp; 2177 struct componentname *a_tcnp; 2178 } */ *ap = v; 2179 PUFFS_MSG_VARS(vn, rename); 2180 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2181 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2182 struct puffs_node *fpn = ap->a_fvp->v_data; 2183 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2184 int error; 2185 bool doabort = true; 2186 2187 if ((fvp->v_mount != tdvp->v_mount) || 2188 (tvp && (fvp->v_mount != tvp->v_mount))) { 2189 ERROUT(EXDEV); 2190 } 2191 2192 PUFFS_MSG_ALLOC(vn, rename); 2193 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2194 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2195 if (tvp) 2196 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2197 else 2198 rename_msg->pvnr_cookie_targ = NULL; 2199 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2200 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2201 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2202 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2203 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2204 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2205 2206 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2207 doabort = false; 2208 PUFFS_MSG_RELEASE(rename); 2209 error = checkerr(pmp, error, __func__); 2210 2211 /* 2212 * XXX: stay in touch with the cache. I don't like this, but 2213 * don't have a better solution either. See also puffs_link(). 2214 */ 2215 if (error == 0) { 2216 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2217 puffs_updatenode(VPTOPP(fdvp), 2218 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2219 if (fdvp != tdvp) 2220 puffs_updatenode(VPTOPP(tdvp), 2221 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 2222 0); 2223 2224 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2225 (VPTOPP(fvp)->pn_parent != tdvp)) 2226 update_parent(fvp, tdvp); 2227 } 2228 2229 2230 out: 2231 if (doabort) 2232 VOP_ABORTOP(tdvp, ap->a_tcnp); 2233 if (tvp != NULL) 2234 vput(tvp); 2235 if (tdvp == tvp) 2236 vrele(tdvp); 2237 else 2238 vput(tdvp); 2239 2240 if (doabort) 2241 VOP_ABORTOP(fdvp, ap->a_fcnp); 2242 vrele(fdvp); 2243 vrele(fvp); 2244 2245 return error; 2246 } 2247 2248 #define RWARGS(cont, iofl, move, offset, creds) \ 2249 (cont)->pvnr_ioflag = (iofl); \ 2250 (cont)->pvnr_resid = (move); \ 2251 (cont)->pvnr_offset = (offset); \ 2252 puffs_credcvt(&(cont)->pvnr_cred, creds) 2253 2254 int 2255 puffs_vnop_read(void *v) 2256 { 2257 struct vop_read_args /* { 2258 const struct vnodeop_desc *a_desc; 2259 struct vnode *a_vp; 2260 struct uio *a_uio; 2261 int a_ioflag; 2262 kauth_cred_t a_cred; 2263 } */ *ap = v; 2264 PUFFS_MSG_VARS(vn, read); 2265 struct vnode *vp = ap->a_vp; 2266 struct puffs_node *pn = VPTOPP(vp); 2267 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2268 struct uio *uio = ap->a_uio; 2269 size_t tomove, argsize; 2270 vsize_t bytelen; 2271 int error; 2272 2273 read_msg = NULL; 2274 error = 0; 2275 2276 /* std sanity */ 2277 if (uio->uio_resid == 0) 2278 return 0; 2279 if (uio->uio_offset < 0) 2280 return EFBIG; 2281 2282 if (vp->v_type == VREG && 2283 PUFFS_USE_PAGECACHE(pmp) && 2284 !(pn->pn_stat & PNODE_RDIRECT)) { 2285 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2286 2287 while (uio->uio_resid > 0) { 2288 if (vp->v_size <= uio->uio_offset) { 2289 break; 2290 } 2291 bytelen = MIN(uio->uio_resid, 2292 vp->v_size - uio->uio_offset); 2293 if (bytelen == 0) 2294 break; 2295 2296 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2297 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2298 if (error) 2299 break; 2300 } 2301 2302 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2303 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2304 } else { 2305 /* 2306 * in case it's not a regular file or we're operating 2307 * uncached, do read in the old-fashioned style, 2308 * i.e. explicit read operations 2309 */ 2310 2311 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2312 argsize = sizeof(struct puffs_vnmsg_read); 2313 puffs_msgmem_alloc(argsize + tomove, &park_read, 2314 (void *)&read_msg, 1); 2315 2316 error = 0; 2317 while (uio->uio_resid > 0) { 2318 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2319 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2320 RWARGS(read_msg, ap->a_ioflag, tomove, 2321 uio->uio_offset, ap->a_cred); 2322 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2323 PUFFS_VN_READ, VPTOPNC(vp)); 2324 puffs_msg_setdelta(park_read, tomove); 2325 2326 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2327 NULL, error); 2328 error = checkerr(pmp, error, __func__); 2329 if (error) 2330 break; 2331 2332 if (read_msg->pvnr_resid > tomove) { 2333 puffs_senderr(pmp, PUFFS_ERR_READ, 2334 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2335 error = EPROTO; 2336 break; 2337 } 2338 2339 error = uiomove(read_msg->pvnr_data, 2340 tomove - read_msg->pvnr_resid, uio); 2341 2342 /* 2343 * in case the file is out of juice, resid from 2344 * userspace is != 0. and the error-case is 2345 * quite obvious 2346 */ 2347 if (error || read_msg->pvnr_resid) 2348 break; 2349 } 2350 2351 puffs_msgmem_release(park_read); 2352 } 2353 2354 return error; 2355 } 2356 2357 /* 2358 * XXX: in case of a failure, this leaves uio in a bad state. 2359 * We could theoretically copy the uio and iovecs and "replay" 2360 * them the right amount after the userspace trip, but don't 2361 * bother for now. 2362 */ 2363 int 2364 puffs_vnop_write(void *v) 2365 { 2366 struct vop_write_args /* { 2367 const struct vnodeop_desc *a_desc; 2368 struct vnode *a_vp; 2369 struct uio *a_uio; 2370 int a_ioflag; 2371 kauth_cred_t a_cred; 2372 } */ *ap = v; 2373 PUFFS_MSG_VARS(vn, write); 2374 struct vnode *vp = ap->a_vp; 2375 struct puffs_node *pn = VPTOPP(vp); 2376 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2377 struct uio *uio = ap->a_uio; 2378 size_t tomove, argsize; 2379 off_t oldoff, newoff, origoff; 2380 vsize_t bytelen; 2381 int error, uflags; 2382 int ubcflags; 2383 2384 error = uflags = 0; 2385 write_msg = NULL; 2386 2387 /* std sanity */ 2388 if (uio->uio_resid == 0) 2389 return 0; 2390 if (uio->uio_offset < 0) 2391 return EFBIG; 2392 2393 mutex_enter(&pn->pn_sizemtx); 2394 2395 /* 2396 * userspace *should* be allowed to control this, 2397 * but with UBC it's a bit unclear how to handle it 2398 */ 2399 if (ap->a_ioflag & IO_APPEND) 2400 uio->uio_offset = vp->v_size; 2401 2402 origoff = uio->uio_offset; 2403 2404 if (vp->v_type == VREG && 2405 PUFFS_USE_PAGECACHE(pmp) && 2406 !(pn->pn_stat & PNODE_WDIRECT)) { 2407 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2408 2409 while (uio->uio_resid > 0) { 2410 oldoff = uio->uio_offset; 2411 bytelen = uio->uio_resid; 2412 2413 newoff = oldoff + bytelen; 2414 if (vp->v_size < newoff) { 2415 uvm_vnp_setwritesize(vp, newoff); 2416 } 2417 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2418 UVM_ADV_RANDOM, ubcflags); 2419 2420 /* 2421 * In case of a ubc_uiomove() error, 2422 * opt to not extend the file at all and 2423 * return an error. Otherwise, if we attempt 2424 * to clear the memory we couldn't fault to, 2425 * we might generate a kernel page fault. 2426 */ 2427 if (vp->v_size < newoff) { 2428 if (error == 0) { 2429 uflags |= PUFFS_UPDATESIZE; 2430 uvm_vnp_setsize(vp, newoff); 2431 } else { 2432 uvm_vnp_setwritesize(vp, vp->v_size); 2433 } 2434 } 2435 if (error) 2436 break; 2437 2438 /* 2439 * If we're writing large files, flush to file server 2440 * every 64k. Otherwise we can very easily exhaust 2441 * kernel and user memory, as the file server cannot 2442 * really keep up with our writing speed. 2443 * 2444 * Note: this does *NOT* honor MNT_ASYNC, because 2445 * that gives userland too much say in the kernel. 2446 */ 2447 if (oldoff >> 16 != uio->uio_offset >> 16) { 2448 mutex_enter(vp->v_interlock); 2449 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2450 uio->uio_offset & ~0xffff, 2451 PGO_CLEANIT | PGO_SYNCIO); 2452 if (error) 2453 break; 2454 } 2455 } 2456 2457 /* synchronous I/O? */ 2458 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2459 mutex_enter(vp->v_interlock); 2460 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2461 round_page(uio->uio_offset), 2462 PGO_CLEANIT | PGO_SYNCIO); 2463 2464 /* write through page cache? */ 2465 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2466 mutex_enter(vp->v_interlock); 2467 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2468 round_page(uio->uio_offset), PGO_CLEANIT); 2469 } 2470 } else { 2471 /* tomove is non-increasing */ 2472 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2473 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2474 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2475 2476 while (uio->uio_resid > 0) { 2477 /* move data to buffer */ 2478 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2479 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2480 RWARGS(write_msg, ap->a_ioflag, tomove, 2481 uio->uio_offset, ap->a_cred); 2482 error = uiomove(write_msg->pvnr_data, tomove, uio); 2483 if (error) 2484 break; 2485 2486 /* move buffer to userspace */ 2487 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2488 PUFFS_VN_WRITE, VPTOPNC(vp)); 2489 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2490 NULL, error); 2491 error = checkerr(pmp, error, __func__); 2492 if (error) 2493 break; 2494 2495 if (write_msg->pvnr_resid > tomove) { 2496 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2497 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2498 error = EPROTO; 2499 break; 2500 } 2501 2502 /* adjust file size */ 2503 if (vp->v_size < uio->uio_offset) { 2504 uflags |= PUFFS_UPDATESIZE; 2505 uvm_vnp_setsize(vp, uio->uio_offset); 2506 } 2507 2508 /* didn't move everything? bad userspace. bail */ 2509 if (write_msg->pvnr_resid != 0) { 2510 error = EIO; 2511 break; 2512 } 2513 } 2514 puffs_msgmem_release(park_write); 2515 2516 /* 2517 * Direct I/O on write but not on read: we must 2518 * invlidate the written pages so that we read 2519 * the written data and not the stalled cache. 2520 */ 2521 if ((error == 0) && 2522 (vp->v_type == VREG) && PUFFS_USE_PAGECACHE(pmp) && 2523 (pn->pn_stat & PNODE_WDIRECT) && 2524 !(pn->pn_stat & PNODE_RDIRECT)) { 2525 voff_t off_lo = trunc_page(origoff); 2526 voff_t off_hi = round_page(uio->uio_offset); 2527 2528 mutex_enter(vp->v_uobj.vmobjlock); 2529 error = VOP_PUTPAGES(vp, off_lo, off_hi, PGO_FREE); 2530 } 2531 } 2532 2533 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2534 uflags |= PUFFS_UPDATEATIME; 2535 uflags |= PUFFS_UPDATECTIME; 2536 uflags |= PUFFS_UPDATEMTIME; 2537 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2538 2539 mutex_exit(&pn->pn_sizemtx); 2540 return error; 2541 } 2542 2543 int 2544 puffs_vnop_fallocate(void *v) 2545 { 2546 struct vop_fallocate_args /* { 2547 const struct vnodeop_desc *a_desc; 2548 struct vnode *a_vp; 2549 off_t a_pos; 2550 off_t a_len; 2551 } */ *ap = v; 2552 struct vnode *vp = ap->a_vp; 2553 struct puffs_node *pn = VPTOPP(vp); 2554 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2555 PUFFS_MSG_VARS(vn, fallocate); 2556 int error; 2557 2558 mutex_enter(&pn->pn_sizemtx); 2559 2560 PUFFS_MSG_ALLOC(vn, fallocate); 2561 fallocate_msg->pvnr_off = ap->a_pos; 2562 fallocate_msg->pvnr_len = ap->a_len; 2563 puffs_msg_setinfo(park_fallocate, PUFFSOP_VN, 2564 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2565 2566 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fallocate, vp->v_data, NULL, error); 2567 error = checkerr(pmp, error, __func__); 2568 PUFFS_MSG_RELEASE(fallocate); 2569 2570 switch (error) { 2571 case 0: 2572 break; 2573 case EAGAIN: 2574 error = EIO; 2575 /* FALLTHROUGH */ 2576 default: 2577 goto out; 2578 } 2579 2580 if (ap->a_pos + ap->a_len > vp->v_size) { 2581 uvm_vnp_setsize(vp, ap->a_pos + ap->a_len); 2582 puffs_updatenode(pn, PUFFS_UPDATESIZE, vp->v_size); 2583 } 2584 out: 2585 mutex_exit(&pn->pn_sizemtx); 2586 2587 return error; 2588 } 2589 2590 int 2591 puffs_vnop_fdiscard(void *v) 2592 { 2593 struct vop_fdiscard_args /* { 2594 const struct vnodeop_desc *a_desc; 2595 struct vnode *a_vp; 2596 off_t a_pos; 2597 off_t a_len; 2598 } */ *ap = v; 2599 struct vnode *vp = ap->a_vp; 2600 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2601 PUFFS_MSG_VARS(vn, fdiscard); 2602 int error; 2603 2604 PUFFS_MSG_ALLOC(vn, fdiscard); 2605 fdiscard_msg->pvnr_off = ap->a_pos; 2606 fdiscard_msg->pvnr_len = ap->a_len; 2607 puffs_msg_setinfo(park_fdiscard, PUFFSOP_VN, 2608 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2609 2610 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fdiscard, vp->v_data, NULL, error); 2611 error = checkerr(pmp, error, __func__); 2612 PUFFS_MSG_RELEASE(fdiscard); 2613 2614 return error; 2615 } 2616 2617 int 2618 puffs_vnop_print(void *v) 2619 { 2620 struct vop_print_args /* { 2621 struct vnode *a_vp; 2622 } */ *ap = v; 2623 PUFFS_MSG_VARS(vn, print); 2624 struct vnode *vp = ap->a_vp; 2625 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2626 struct puffs_node *pn = vp->v_data; 2627 2628 /* kernel portion */ 2629 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2630 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2631 if (vp->v_type == VFIFO) 2632 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2633 printf("\n"); 2634 2635 /* userspace portion */ 2636 if (EXISTSOP(pmp, PRINT)) { 2637 PUFFS_MSG_ALLOC(vn, print); 2638 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2639 PUFFS_VN_PRINT, VPTOPNC(vp)); 2640 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2641 NULL); 2642 PUFFS_MSG_RELEASE(print); 2643 } 2644 2645 return 0; 2646 } 2647 2648 int 2649 puffs_vnop_pathconf(void *v) 2650 { 2651 struct vop_pathconf_args /* { 2652 const struct vnodeop_desc *a_desc; 2653 struct vnode *a_vp; 2654 int a_name; 2655 register_t *a_retval; 2656 } */ *ap = v; 2657 PUFFS_MSG_VARS(vn, pathconf); 2658 struct vnode *vp = ap->a_vp; 2659 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2660 int error; 2661 2662 PUFFS_MSG_ALLOC(vn, pathconf); 2663 pathconf_msg->pvnr_name = ap->a_name; 2664 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2665 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2666 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2667 error = checkerr(pmp, error, __func__); 2668 if (!error) 2669 *ap->a_retval = pathconf_msg->pvnr_retval; 2670 PUFFS_MSG_RELEASE(pathconf); 2671 2672 return error; 2673 } 2674 2675 int 2676 puffs_vnop_advlock(void *v) 2677 { 2678 struct vop_advlock_args /* { 2679 const struct vnodeop_desc *a_desc; 2680 struct vnode *a_vp; 2681 void *a_id; 2682 int a_op; 2683 struct flock *a_fl; 2684 int a_flags; 2685 } */ *ap = v; 2686 PUFFS_MSG_VARS(vn, advlock); 2687 struct vnode *vp = ap->a_vp; 2688 struct puffs_node *pn = VPTOPP(vp); 2689 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2690 int error; 2691 2692 if (!EXISTSOP(pmp, ADVLOCK)) 2693 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2694 2695 PUFFS_MSG_ALLOC(vn, advlock); 2696 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2697 sizeof(advlock_msg->pvnr_fl)); 2698 advlock_msg->pvnr_id = ap->a_id; 2699 advlock_msg->pvnr_op = ap->a_op; 2700 advlock_msg->pvnr_flags = ap->a_flags; 2701 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2702 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2703 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2704 error = checkerr(pmp, error, __func__); 2705 PUFFS_MSG_RELEASE(advlock); 2706 2707 return error; 2708 } 2709 2710 int 2711 puffs_vnop_abortop(void *v) 2712 { 2713 struct vop_abortop_args /* { 2714 struct vnode *a_dvp; 2715 struct componentname *a_cnp; 2716 }; */ *ap = v; 2717 PUFFS_MSG_VARS(vn, abortop); 2718 struct vnode *dvp = ap->a_dvp; 2719 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2720 struct componentname *cnp = ap->a_cnp; 2721 2722 if (EXISTSOP(pmp, ABORTOP)) { 2723 PUFFS_MSG_ALLOC(vn, abortop); 2724 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2725 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2726 puffs_msg_setfaf(park_abortop); 2727 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2728 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2729 2730 puffs_msg_enqueue(pmp, park_abortop); 2731 PUFFS_MSG_RELEASE(abortop); 2732 } 2733 2734 return genfs_abortop(v); 2735 } 2736 2737 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2738 2739 /* 2740 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2741 */ 2742 int 2743 puffs_vnop_strategy(void *v) 2744 { 2745 struct vop_strategy_args /* { 2746 const struct vnodeop_desc *a_desc; 2747 struct vnode *a_vp; 2748 struct buf *a_bp; 2749 } */ *ap = v; 2750 PUFFS_MSG_VARS(vn, rw); 2751 struct vnode *vp = ap->a_vp; 2752 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2753 struct puffs_node *pn; 2754 struct buf *bp; 2755 size_t argsize; 2756 size_t tomove, moved; 2757 int error, dofaf, cansleep, dobiodone; 2758 2759 pmp = MPTOPUFFSMP(vp->v_mount); 2760 bp = ap->a_bp; 2761 error = 0; 2762 dofaf = 0; 2763 cansleep = 0; 2764 pn = VPTOPP(vp); 2765 park_rw = NULL; /* explicit */ 2766 dobiodone = 1; 2767 2768 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2769 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2770 ERROUT(EOPNOTSUPP); 2771 2772 /* 2773 * Short-circuit optimization: don't flush buffer in between 2774 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2775 */ 2776 if (pn->pn_stat & PNODE_DYING) { 2777 KASSERT(BUF_ISWRITE(bp)); 2778 bp->b_resid = 0; 2779 goto out; 2780 } 2781 2782 #ifdef DIAGNOSTIC 2783 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2784 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2785 bp->b_bcount); 2786 #endif 2787 2788 /* 2789 * See explanation for the necessity of a FAF in puffs_fsync. 2790 * 2791 * Also, do FAF in case we're suspending. 2792 * See puffs_vfsops.c:pageflush() 2793 */ 2794 if (BUF_ISWRITE(bp)) { 2795 mutex_enter(vp->v_interlock); 2796 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2797 dofaf = 1; 2798 if (pn->pn_stat & PNODE_FAF) 2799 dofaf = 1; 2800 mutex_exit(vp->v_interlock); 2801 } 2802 2803 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2804 2805 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2806 2807 /* allocate transport structure */ 2808 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2809 argsize = sizeof(struct puffs_vnmsg_rw); 2810 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2811 (void *)&rw_msg, cansleep); 2812 if (error) 2813 goto out; 2814 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2815 2816 /* 2x2 cases: read/write, faf/nofaf */ 2817 if (BUF_ISREAD(bp)) { 2818 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2819 PUFFS_VN_READ, VPTOPNC(vp)); 2820 puffs_msg_setdelta(park_rw, tomove); 2821 if (BIOASYNC(bp)) { 2822 puffs_msg_setcall(park_rw, 2823 puffs_parkdone_asyncbioread, bp); 2824 puffs_msg_enqueue(pmp, park_rw); 2825 dobiodone = 0; 2826 } else { 2827 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2828 NULL, error); 2829 error = checkerr(pmp, error, __func__); 2830 if (error) 2831 goto out; 2832 2833 if (rw_msg->pvnr_resid > tomove) { 2834 puffs_senderr(pmp, PUFFS_ERR_READ, 2835 E2BIG, "resid grew", VPTOPNC(vp)); 2836 ERROUT(EPROTO); 2837 } 2838 2839 moved = tomove - rw_msg->pvnr_resid; 2840 2841 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2842 bp->b_resid = bp->b_bcount - moved; 2843 } 2844 } else { 2845 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2846 PUFFS_VN_WRITE, VPTOPNC(vp)); 2847 /* 2848 * make pages read-only before we write them if we want 2849 * write caching info 2850 */ 2851 if (PUFFS_WCACHEINFO(pmp)) { 2852 struct uvm_object *uobj = &vp->v_uobj; 2853 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2854 struct vm_page *vmp; 2855 int i; 2856 2857 for (i = 0; i < npages; i++) { 2858 vmp= uvm_pageratop((vaddr_t)bp->b_data 2859 + (i << PAGE_SHIFT)); 2860 DPRINTF(("puffs_strategy: write-protecting " 2861 "vp %p page %p, offset %" PRId64"\n", 2862 vp, vmp, vmp->offset)); 2863 mutex_enter(uobj->vmobjlock); 2864 vmp->flags |= PG_RDONLY; 2865 pmap_page_protect(vmp, VM_PROT_READ); 2866 mutex_exit(uobj->vmobjlock); 2867 } 2868 } 2869 2870 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2871 if (dofaf) { 2872 puffs_msg_setfaf(park_rw); 2873 } else if (BIOASYNC(bp)) { 2874 puffs_msg_setcall(park_rw, 2875 puffs_parkdone_asyncbiowrite, bp); 2876 dobiodone = 0; 2877 } 2878 2879 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2880 2881 if (dobiodone == 0) 2882 goto out; 2883 2884 error = checkerr(pmp, error, __func__); 2885 if (error) 2886 goto out; 2887 2888 if (rw_msg->pvnr_resid > tomove) { 2889 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2890 E2BIG, "resid grew", VPTOPNC(vp)); 2891 ERROUT(EPROTO); 2892 } 2893 2894 /* 2895 * FAF moved everything. Frankly, we don't 2896 * really have a choice. 2897 */ 2898 if (dofaf && error == 0) 2899 moved = tomove; 2900 else 2901 moved = tomove - rw_msg->pvnr_resid; 2902 2903 bp->b_resid = bp->b_bcount - moved; 2904 if (bp->b_resid != 0) { 2905 ERROUT(EIO); 2906 } 2907 } 2908 2909 out: 2910 if (park_rw) 2911 puffs_msgmem_release(park_rw); 2912 2913 if (error) 2914 bp->b_error = error; 2915 2916 if (error || dobiodone) 2917 biodone(bp); 2918 2919 return error; 2920 } 2921 2922 int 2923 puffs_vnop_mmap(void *v) 2924 { 2925 struct vop_mmap_args /* { 2926 const struct vnodeop_desc *a_desc; 2927 struct vnode *a_vp; 2928 vm_prot_t a_prot; 2929 kauth_cred_t a_cred; 2930 } */ *ap = v; 2931 PUFFS_MSG_VARS(vn, mmap); 2932 struct vnode *vp = ap->a_vp; 2933 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2934 int error; 2935 2936 if (!PUFFS_USE_PAGECACHE(pmp)) 2937 return genfs_eopnotsupp(v); 2938 2939 if (EXISTSOP(pmp, MMAP)) { 2940 PUFFS_MSG_ALLOC(vn, mmap); 2941 mmap_msg->pvnr_prot = ap->a_prot; 2942 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2943 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2944 PUFFS_VN_MMAP, VPTOPNC(vp)); 2945 2946 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2947 error = checkerr(pmp, error, __func__); 2948 PUFFS_MSG_RELEASE(mmap); 2949 } else { 2950 error = genfs_mmap(v); 2951 } 2952 2953 return error; 2954 } 2955 2956 2957 /* 2958 * The rest don't get a free trip to userspace and back, they 2959 * have to stay within the kernel. 2960 */ 2961 2962 /* 2963 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2964 * well, maybe somehow, somewhere, some day .... 2965 */ 2966 int 2967 puffs_vnop_bmap(void *v) 2968 { 2969 struct vop_bmap_args /* { 2970 const struct vnodeop_desc *a_desc; 2971 struct vnode *a_vp; 2972 daddr_t a_bn; 2973 struct vnode **a_vpp; 2974 daddr_t *a_bnp; 2975 int *a_runp; 2976 } */ *ap = v; 2977 struct puffs_mount *pmp; 2978 2979 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2980 2981 if (ap->a_vpp) 2982 *ap->a_vpp = ap->a_vp; 2983 if (ap->a_bnp) 2984 *ap->a_bnp = ap->a_bn; 2985 if (ap->a_runp) 2986 *ap->a_runp 2987 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2988 2989 return 0; 2990 } 2991 2992 /* 2993 * Handle getpages faults in puffs. We let genfs_getpages() do most 2994 * of the dirty work, but we come in this route to do accounting tasks. 2995 * If the user server has specified functions for cache notifications 2996 * about reads and/or writes, we record which type of operation we got, 2997 * for which page range, and proceed to issue a FAF notification to the 2998 * server about it. 2999 */ 3000 int 3001 puffs_vnop_getpages(void *v) 3002 { 3003 struct vop_getpages_args /* { 3004 const struct vnodeop_desc *a_desc; 3005 struct vnode *a_vp; 3006 voff_t a_offset; 3007 struct vm_page **a_m; 3008 int *a_count; 3009 int a_centeridx; 3010 vm_prot_t a_access_type; 3011 int a_advice; 3012 int a_flags; 3013 } */ *ap = v; 3014 struct puffs_mount *pmp; 3015 struct puffs_node *pn; 3016 struct vnode *vp; 3017 struct vm_page **pgs; 3018 struct puffs_cacheinfo *pcinfo = NULL; 3019 struct puffs_cacherun *pcrun; 3020 void *parkmem = NULL; 3021 size_t runsizes; 3022 int i, npages, si, streakon; 3023 int error, locked, write; 3024 3025 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 3026 npages = *ap->a_count; 3027 pgs = ap->a_m; 3028 vp = ap->a_vp; 3029 pn = vp->v_data; 3030 locked = (ap->a_flags & PGO_LOCKED) != 0; 3031 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 3032 3033 /* ccg xnaht - gets Wuninitialized wrong */ 3034 pcrun = NULL; 3035 runsizes = 0; 3036 3037 /* 3038 * Check that we aren't trying to fault in pages which our file 3039 * server doesn't know about. This happens if we extend a file by 3040 * skipping some pages and later try to fault in pages which 3041 * are between pn_serversize and vp_size. This check optimizes 3042 * away the common case where a file is being extended. 3043 */ 3044 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 3045 struct vattr va; 3046 3047 /* try again later when we can block */ 3048 if (locked) 3049 ERROUT(EBUSY); 3050 3051 mutex_exit(vp->v_interlock); 3052 vattr_null(&va); 3053 va.va_size = vp->v_size; 3054 error = dosetattr(vp, &va, FSCRED, 0); 3055 if (error) 3056 ERROUT(error); 3057 mutex_enter(vp->v_interlock); 3058 } 3059 3060 if (write && PUFFS_WCACHEINFO(pmp)) { 3061 #ifdef notnowjohn 3062 /* allocate worst-case memory */ 3063 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 3064 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 3065 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 3066 locked ? KM_NOSLEEP : KM_SLEEP); 3067 3068 /* 3069 * can't block if we're locked and can't mess up caching 3070 * information for fs server. so come back later, please 3071 */ 3072 if (pcinfo == NULL) 3073 ERROUT(ENOMEM); 3074 3075 parkmem = puffs_park_alloc(locked == 0); 3076 if (parkmem == NULL) 3077 ERROUT(ENOMEM); 3078 3079 pcrun = pcinfo->pcache_runs; 3080 #else 3081 (void)parkmem; 3082 #endif 3083 } 3084 3085 error = genfs_getpages(v); 3086 if (error) 3087 goto out; 3088 3089 if (PUFFS_WCACHEINFO(pmp) == 0) 3090 goto out; 3091 3092 /* 3093 * Let's see whose fault it was and inform the user server of 3094 * possibly read/written pages. Map pages from read faults 3095 * strictly read-only, since otherwise we might miss info on 3096 * when the page is actually write-faulted to. 3097 */ 3098 if (!locked) 3099 mutex_enter(vp->v_uobj.vmobjlock); 3100 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 3101 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 3102 if (streakon && write) { 3103 streakon = 0; 3104 pcrun[si].pcache_runend 3105 = trunc_page(pgs[i]->offset) + PAGE_MASK; 3106 si++; 3107 } 3108 continue; 3109 } 3110 if (streakon == 0 && write) { 3111 streakon = 1; 3112 pcrun[si].pcache_runstart = pgs[i]->offset; 3113 } 3114 3115 if (!write) 3116 pgs[i]->flags |= PG_RDONLY; 3117 } 3118 /* was the last page part of our streak? */ 3119 if (streakon) { 3120 pcrun[si].pcache_runend 3121 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 3122 si++; 3123 } 3124 if (!locked) 3125 mutex_exit(vp->v_uobj.vmobjlock); 3126 3127 KASSERT(si <= (npages / 2) + 1); 3128 3129 #ifdef notnowjohn 3130 /* send results to userspace */ 3131 if (write) 3132 puffs_cacheop(pmp, parkmem, pcinfo, 3133 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 3134 #endif 3135 3136 out: 3137 if (error) { 3138 if (pcinfo != NULL) 3139 kmem_free(pcinfo, 3140 sizeof(struct puffs_cacheinfo) + runsizes); 3141 #ifdef notnowjohn 3142 if (parkmem != NULL) 3143 puffs_park_release(parkmem, 1); 3144 #endif 3145 } 3146 3147 return error; 3148 } 3149 3150 /* 3151 * Extended attribute support. 3152 */ 3153 3154 int 3155 puffs_vnop_getextattr(void *v) 3156 { 3157 struct vop_getextattr_args /* 3158 struct vnode *a_vp; 3159 int a_attrnamespace; 3160 const char *a_name; 3161 struct uio *a_uio; 3162 size_t *a_size; 3163 kauth_cred_t a_cred; 3164 }; */ *ap = v; 3165 PUFFS_MSG_VARS(vn, getextattr); 3166 struct vnode *vp = ap->a_vp; 3167 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3168 int attrnamespace = ap->a_attrnamespace; 3169 const char *name = ap->a_name; 3170 struct uio *uio = ap->a_uio; 3171 size_t *sizep = ap->a_size; 3172 size_t tomove, resid; 3173 int error; 3174 3175 if (uio) 3176 resid = uio->uio_resid; 3177 else 3178 resid = 0; 3179 3180 tomove = PUFFS_TOMOVE(resid, pmp); 3181 if (tomove != resid) { 3182 error = E2BIG; 3183 goto out; 3184 } 3185 3186 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3187 &park_getextattr, (void *)&getextattr_msg, 1); 3188 3189 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3190 strlcpy(getextattr_msg->pvnr_attrname, name, 3191 sizeof(getextattr_msg->pvnr_attrname)); 3192 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3193 if (sizep) 3194 getextattr_msg->pvnr_datasize = 1; 3195 getextattr_msg->pvnr_resid = tomove; 3196 3197 puffs_msg_setinfo(park_getextattr, 3198 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3199 puffs_msg_setdelta(park_getextattr, tomove); 3200 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3201 3202 error = checkerr(pmp, error, __func__); 3203 if (error) 3204 goto out; 3205 3206 resid = getextattr_msg->pvnr_resid; 3207 if (resid > tomove) { 3208 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3209 "resid grew", VPTOPNC(vp)); 3210 error = EPROTO; 3211 goto out; 3212 } 3213 3214 if (sizep) 3215 *sizep = getextattr_msg->pvnr_datasize; 3216 if (uio) 3217 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3218 3219 out: 3220 PUFFS_MSG_RELEASE(getextattr); 3221 return error; 3222 } 3223 3224 int 3225 puffs_vnop_setextattr(void *v) 3226 { 3227 struct vop_setextattr_args /* { 3228 struct vnode *a_vp; 3229 int a_attrnamespace; 3230 const char *a_name; 3231 struct uio *a_uio; 3232 kauth_cred_t a_cred; 3233 }; */ *ap = v; 3234 PUFFS_MSG_VARS(vn, setextattr); 3235 struct vnode *vp = ap->a_vp; 3236 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3237 int attrnamespace = ap->a_attrnamespace; 3238 const char *name = ap->a_name; 3239 struct uio *uio = ap->a_uio; 3240 size_t tomove, resid; 3241 int error; 3242 3243 if (uio) 3244 resid = uio->uio_resid; 3245 else 3246 resid = 0; 3247 3248 tomove = PUFFS_TOMOVE(resid, pmp); 3249 if (tomove != resid) { 3250 error = E2BIG; 3251 goto out; 3252 } 3253 3254 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3255 &park_setextattr, (void *)&setextattr_msg, 1); 3256 3257 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3258 strlcpy(setextattr_msg->pvnr_attrname, name, 3259 sizeof(setextattr_msg->pvnr_attrname)); 3260 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3261 setextattr_msg->pvnr_resid = tomove; 3262 3263 if (uio) { 3264 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3265 if (error) 3266 goto out; 3267 } 3268 3269 puffs_msg_setinfo(park_setextattr, 3270 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3271 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3272 3273 error = checkerr(pmp, error, __func__); 3274 if (error) 3275 goto out; 3276 3277 if (setextattr_msg->pvnr_resid != 0) 3278 error = EIO; 3279 3280 out: 3281 PUFFS_MSG_RELEASE(setextattr); 3282 3283 return error; 3284 } 3285 3286 int 3287 puffs_vnop_listextattr(void *v) 3288 { 3289 struct vop_listextattr_args /* { 3290 struct vnode *a_vp; 3291 int a_attrnamespace; 3292 struct uio *a_uio; 3293 size_t *a_size; 3294 int a_flag, 3295 kauth_cred_t a_cred; 3296 }; */ *ap = v; 3297 PUFFS_MSG_VARS(vn, listextattr); 3298 struct vnode *vp = ap->a_vp; 3299 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3300 int attrnamespace = ap->a_attrnamespace; 3301 struct uio *uio = ap->a_uio; 3302 size_t *sizep = ap->a_size; 3303 int flag = ap->a_flag; 3304 size_t tomove, resid; 3305 int error; 3306 3307 if (uio) 3308 resid = uio->uio_resid; 3309 else 3310 resid = 0; 3311 3312 tomove = PUFFS_TOMOVE(resid, pmp); 3313 if (tomove != resid) { 3314 error = E2BIG; 3315 goto out; 3316 } 3317 3318 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3319 &park_listextattr, (void *)&listextattr_msg, 1); 3320 3321 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3322 listextattr_msg->pvnr_flag = flag; 3323 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3324 listextattr_msg->pvnr_resid = tomove; 3325 if (sizep) 3326 listextattr_msg->pvnr_datasize = 1; 3327 3328 puffs_msg_setinfo(park_listextattr, 3329 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3330 puffs_msg_setdelta(park_listextattr, tomove); 3331 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3332 3333 error = checkerr(pmp, error, __func__); 3334 if (error) 3335 goto out; 3336 3337 resid = listextattr_msg->pvnr_resid; 3338 if (resid > tomove) { 3339 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3340 "resid grew", VPTOPNC(vp)); 3341 error = EPROTO; 3342 goto out; 3343 } 3344 3345 if (sizep) 3346 *sizep = listextattr_msg->pvnr_datasize; 3347 if (uio) 3348 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3349 3350 out: 3351 PUFFS_MSG_RELEASE(listextattr); 3352 return error; 3353 } 3354 3355 int 3356 puffs_vnop_deleteextattr(void *v) 3357 { 3358 struct vop_deleteextattr_args /* { 3359 struct vnode *a_vp; 3360 int a_attrnamespace; 3361 const char *a_name; 3362 kauth_cred_t a_cred; 3363 }; */ *ap = v; 3364 PUFFS_MSG_VARS(vn, deleteextattr); 3365 struct vnode *vp = ap->a_vp; 3366 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3367 int attrnamespace = ap->a_attrnamespace; 3368 const char *name = ap->a_name; 3369 int error; 3370 3371 PUFFS_MSG_ALLOC(vn, deleteextattr); 3372 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3373 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3374 sizeof(deleteextattr_msg->pvnr_attrname)); 3375 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3376 3377 puffs_msg_setinfo(park_deleteextattr, 3378 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3379 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3380 vp->v_data, NULL, error); 3381 3382 error = checkerr(pmp, error, __func__); 3383 3384 PUFFS_MSG_RELEASE(deleteextattr); 3385 return error; 3386 } 3387 3388 /* 3389 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3390 * FAF update information for the puffs node first. 3391 */ 3392 int 3393 puffs_vnop_spec_read(void *v) 3394 { 3395 struct vop_read_args /* { 3396 const struct vnodeop_desc *a_desc; 3397 struct vnode *a_vp; 3398 struct uio *a_uio; 3399 int a_ioflag; 3400 kauth_cred_t a_cred; 3401 } */ *ap = v; 3402 3403 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3404 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3405 } 3406 3407 int 3408 puffs_vnop_spec_write(void *v) 3409 { 3410 struct vop_write_args /* { 3411 const struct vnodeop_desc *a_desc; 3412 struct vnode *a_vp; 3413 struct uio *a_uio; 3414 int a_ioflag; 3415 kauth_cred_t a_cred; 3416 } */ *ap = v; 3417 3418 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3419 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3420 } 3421 3422 int 3423 puffs_vnop_fifo_read(void *v) 3424 { 3425 struct vop_read_args /* { 3426 const struct vnodeop_desc *a_desc; 3427 struct vnode *a_vp; 3428 struct uio *a_uio; 3429 int a_ioflag; 3430 kauth_cred_t a_cred; 3431 } */ *ap = v; 3432 3433 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3434 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3435 } 3436 3437 int 3438 puffs_vnop_fifo_write(void *v) 3439 { 3440 struct vop_write_args /* { 3441 const struct vnodeop_desc *a_desc; 3442 struct vnode *a_vp; 3443 struct uio *a_uio; 3444 int a_ioflag; 3445 kauth_cred_t a_cred; 3446 } */ *ap = v; 3447 3448 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3449 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3450 } 3451
Indexes created Thu Oct 02 01:09:59 GMT 2025