puffs_vnops.c revision 1.211
1 /* $NetBSD: puffs_vnops.c,v 1.211 2017/05/26 14:21:01 riastradh 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 1.211 2017/05/26 14:21:01 riastradh 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 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1004 int use_metacache; 1005 1006 if (TTL_VALID(cn_ttl)) { 1007 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1008 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1009 } 1010 1011 /* 1012 * Don't listen to the file server regarding special device 1013 * size info, the file server doesn't know anything about them. 1014 */ 1015 if (vp->v_type == VBLK || vp->v_type == VCHR) 1016 rvap->va_size = vp->v_size; 1017 1018 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1019 if (vp->v_type == VBLK) 1020 rvap->va_blocksize = BLKDEV_IOSIZE; 1021 else if (vp->v_type == VCHR) 1022 rvap->va_blocksize = MAXBSIZE; 1023 1024 if (vap != NULL) { 1025 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1026 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1027 1028 if (PUFFS_USE_METAFLUSH(pmp)) { 1029 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1030 vap->va_atime = pn->pn_mc_atime; 1031 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1032 vap->va_ctime = pn->pn_mc_ctime; 1033 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1034 vap->va_mtime = pn->pn_mc_mtime; 1035 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1036 vap->va_size = pn->pn_mc_size; 1037 } 1038 } 1039 1040 use_metacache = PUFFS_USE_METAFLUSH(pmp) && 1041 (pn->pn_stat & PNODE_METACACHE_SIZE); 1042 if (!use_metacache && (flags & SETATTR_CHSIZE)) { 1043 if (rvap->va_size != VNOVAL 1044 && vp->v_type != VBLK && vp->v_type != VCHR) { 1045 uvm_vnp_setsize(vp, rvap->va_size); 1046 pn->pn_serversize = rvap->va_size; 1047 } 1048 } 1049 1050 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1051 if (pn->pn_va_cache == NULL) 1052 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1053 1054 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1055 1056 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1057 } 1058 } 1059 1060 static void 1061 update_parent(struct vnode *vp, struct vnode *dvp) 1062 { 1063 struct puffs_node *pn = VPTOPP(vp); 1064 1065 if (pn->pn_parent != NULL) { 1066 KASSERT(pn->pn_parent != dvp); 1067 vrele(pn->pn_parent); 1068 } 1069 1070 vref(dvp); 1071 pn->pn_parent = dvp; 1072 } 1073 1074 int 1075 puffs_vnop_getattr(void *v) 1076 { 1077 struct vop_getattr_args /* { 1078 const struct vnodeop_desc *a_desc; 1079 struct vnode *a_vp; 1080 struct vattr *a_vap; 1081 kauth_cred_t a_cred; 1082 } */ *ap = v; 1083 PUFFS_MSG_VARS(vn, getattr); 1084 struct vnode *vp = ap->a_vp; 1085 struct mount *mp = vp->v_mount; 1086 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1087 struct vattr *vap, *rvap; 1088 struct puffs_node *pn = VPTOPP(vp); 1089 struct timespec *va_ttl = NULL; 1090 int error = 0; 1091 1092 /* 1093 * A lock is required so that we do not race with 1094 * setattr, write and fsync when changing vp->v_size. 1095 * This is critical, since setting a stall smaler value 1096 * triggers a file truncate in uvm_vnp_setsize(), which 1097 * most of the time means data corruption (a chunk of 1098 * data is replaced by zeroes). This can be removed if 1099 * we decide one day that VOP_GETATTR must operate on 1100 * a locked vnode. 1101 * 1102 * XXX Should be useless now that VOP_GETATTR has been 1103 * fixed to always require a shared lock at least. 1104 */ 1105 mutex_enter(&pn->pn_sizemtx); 1106 1107 REFPN(pn); 1108 vap = ap->a_vap; 1109 1110 if (PUFFS_USE_FS_TTL(pmp)) { 1111 if (!TIMED_OUT(pn->pn_va_timeout)) { 1112 update_va(vp, vap, pn->pn_va_cache, 1113 NULL, NULL, SETATTR_CHSIZE); 1114 goto out2; 1115 } 1116 } 1117 1118 PUFFS_MSG_ALLOC(vn, getattr); 1119 vattr_null(&getattr_msg->pvnr_va); 1120 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1121 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1122 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1123 1124 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1125 error = checkerr(pmp, error, __func__); 1126 if (error) 1127 goto out; 1128 1129 rvap = &getattr_msg->pvnr_va; 1130 1131 if (PUFFS_USE_FS_TTL(pmp)) 1132 va_ttl = &getattr_msg->pvnr_va_ttl; 1133 1134 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1135 1136 out: 1137 PUFFS_MSG_RELEASE(getattr); 1138 1139 out2: 1140 puffs_releasenode(pn); 1141 1142 mutex_exit(&pn->pn_sizemtx); 1143 1144 return error; 1145 } 1146 1147 static void 1148 zerofill_lastpage(struct vnode *vp, voff_t off) 1149 { 1150 1151 if (trunc_page(off) == off) 1152 return; 1153 1154 if (vp->v_writecount == 0) 1155 return; 1156 1157 vsize_t len = round_page(off) - off; 1158 ubc_zerorange(&vp->v_uobj, off, len, UBC_WRITE|UBC_UNMAP_FLAG(vp)); 1159 } 1160 1161 static int 1162 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1163 { 1164 PUFFS_MSG_VARS(vn, setattr); 1165 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1166 struct puffs_node *pn = vp->v_data; 1167 vsize_t oldsize = vp->v_size; 1168 int error = 0; 1169 1170 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1171 1172 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1173 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1174 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1175 || vap->va_mode != (mode_t)VNOVAL)) 1176 return EROFS; 1177 1178 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1179 && vp->v_type == VREG && vap->va_size != VNOVAL) 1180 return EROFS; 1181 1182 /* 1183 * Flush metacache first. If we are called with some explicit 1184 * parameters, treat them as information overriding metacache 1185 * information. 1186 */ 1187 if (PUFFS_USE_METAFLUSH(pmp) && pn->pn_stat & PNODE_METACACHE_MASK) { 1188 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1189 && vap->va_atime.tv_sec == VNOVAL) 1190 vap->va_atime = pn->pn_mc_atime; 1191 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1192 && vap->va_ctime.tv_sec == VNOVAL) 1193 vap->va_ctime = pn->pn_mc_ctime; 1194 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1195 && vap->va_mtime.tv_sec == VNOVAL) 1196 vap->va_mtime = pn->pn_mc_mtime; 1197 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1198 && vap->va_size == VNOVAL) 1199 vap->va_size = pn->pn_mc_size; 1200 1201 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1202 } 1203 1204 /* 1205 * Flush attribute cache so that another thread do 1206 * not get a stale value during the operation. 1207 */ 1208 if (PUFFS_USE_FS_TTL(pmp)) 1209 pn->pn_va_timeout = 0; 1210 1211 PUFFS_MSG_ALLOC(vn, setattr); 1212 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1213 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1214 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1215 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1216 if (flags & SETATTR_ASYNC) 1217 puffs_msg_setfaf(park_setattr); 1218 1219 puffs_msg_enqueue(pmp, park_setattr); 1220 if ((flags & SETATTR_ASYNC) == 0) { 1221 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1222 1223 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1224 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1225 struct vattr *rvap = &setattr_msg->pvnr_va; 1226 1227 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1228 } 1229 } 1230 1231 PUFFS_MSG_RELEASE(setattr); 1232 if ((flags & SETATTR_ASYNC) == 0) { 1233 error = checkerr(pmp, error, __func__); 1234 if (error) 1235 return error; 1236 } else { 1237 error = 0; 1238 } 1239 1240 if (vap->va_size != VNOVAL) { 1241 /* 1242 * If we truncated the file, make sure the data beyond 1243 * EOF in last page does not remain in cache, otherwise 1244 * if the file is later truncated to a larger size (creating 1245 * a hole), that area will not return zeroes as it 1246 * should. 1247 */ 1248 if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && 1249 (vap->va_size < oldsize)) 1250 zerofill_lastpage(vp, vap->va_size); 1251 1252 pn->pn_serversize = vap->va_size; 1253 if (flags & SETATTR_CHSIZE) 1254 uvm_vnp_setsize(vp, vap->va_size); 1255 puffs_updatenode(pn, PUFFS_UPDATECTIME | PUFFS_UPDATEMTIME, 0); 1256 } 1257 1258 return 0; 1259 } 1260 1261 int 1262 puffs_vnop_setattr(void *v) 1263 { 1264 struct vop_getattr_args /* { 1265 const struct vnodeop_desc *a_desc; 1266 struct vnode *a_vp; 1267 struct vattr *a_vap; 1268 kauth_cred_t a_cred; 1269 } */ *ap = v; 1270 struct puffs_node *pn = ap->a_vp->v_data; 1271 int error; 1272 1273 mutex_enter(&pn->pn_sizemtx); 1274 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1275 mutex_exit(&pn->pn_sizemtx); 1276 1277 return error; 1278 } 1279 1280 static __inline int 1281 doinact(struct puffs_mount *pmp, int iaflag) 1282 { 1283 1284 if (EXISTSOP(pmp, INACTIVE)) 1285 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1286 if (iaflag || ALLOPS(pmp)) 1287 return 1; 1288 else 1289 return 0; 1290 else 1291 return 1; 1292 else 1293 return 0; 1294 } 1295 1296 static void 1297 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1298 { 1299 PUFFS_MSG_VARS(vn, inactive); 1300 1301 if (doinact(pmp, iaflag)) { 1302 PUFFS_MSG_ALLOC(vn, inactive); 1303 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1304 PUFFS_VN_INACTIVE, ck); 1305 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1306 PUFFS_MSG_RELEASE(inactive); 1307 } 1308 } 1309 1310 /* XXX: callinactive can't setback */ 1311 int 1312 puffs_vnop_inactive(void *v) 1313 { 1314 struct vop_inactive_v2_args /* { 1315 const struct vnodeop_desc *a_desc; 1316 struct vnode *a_vp; 1317 } */ *ap = v; 1318 PUFFS_MSG_VARS(vn, inactive); 1319 struct vnode *vp = ap->a_vp; 1320 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1321 struct puffs_node *pnode; 1322 bool recycle = false; 1323 1324 /* 1325 * When puffs_cookie2vnode() misses an entry, vcache_get() 1326 * creates a new node (puffs_vfsop_loadvnode being called to 1327 * initialize the PUFFS part), then it discovers it is VNON, 1328 * and tries to vrele() it. This leads us there, while the 1329 * cookie was stall and the node likely already reclaimed. 1330 */ 1331 if (vp->v_type == VNON) { 1332 return 0; 1333 } 1334 1335 pnode = vp->v_data; 1336 mutex_enter(&pnode->pn_sizemtx); 1337 1338 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1339 flushvncache(vp, 0, 0, false); 1340 PUFFS_MSG_ALLOC(vn, inactive); 1341 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1342 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1343 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1344 NULL); 1345 PUFFS_MSG_RELEASE(inactive); 1346 } 1347 pnode->pn_stat &= ~PNODE_DOINACT; 1348 1349 /* 1350 * file server thinks it's gone? then don't be afraid care, 1351 * node's life was already all it would ever be 1352 */ 1353 if (pnode->pn_stat & PNODE_NOREFS) { 1354 pnode->pn_stat |= PNODE_DYING; 1355 recycle = true; 1356 } 1357 1358 /* 1359 * Handle node TTL. 1360 * If grace has already timed out, make it reclaimed. 1361 * Otherwise, we queue its expiration by sop thread, so 1362 * that it does not remain for ages in the freelist, 1363 * holding memory in userspace, while we will have 1364 * to look it up again anyway. 1365 */ 1366 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1367 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1368 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1369 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1370 1371 if (!incache && !ingrace && !reclaimqueued) { 1372 pnode->pn_stat |= PNODE_DYING; 1373 recycle = true; 1374 } 1375 1376 if (!recycle && !reclaimqueued) { 1377 struct puffs_sopreq *psopr; 1378 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1379 1380 KASSERT(curlwp != uvm.pagedaemon_lwp); 1381 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1382 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1383 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1384 psopr->psopr_at = at; 1385 1386 mutex_enter(&pmp->pmp_sopmtx); 1387 1388 /* 1389 * If thread has disapeared, just give up. The 1390 * fs is being unmounted and the node will be 1391 * be reclaimed anyway. 1392 * 1393 * Otherwise, we queue the request but do not 1394 * immediatly signal the thread, as the node 1395 * has not been expired yet. 1396 */ 1397 if (pmp->pmp_sopthrcount == 0) { 1398 kmem_free(psopr, sizeof(*psopr)); 1399 } else { 1400 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1401 psopr, psopr_entries); 1402 pnode->pn_stat |= PNODE_SOPEXP; 1403 } 1404 1405 mutex_exit(&pmp->pmp_sopmtx); 1406 } 1407 } 1408 1409 /* 1410 * Wipe direct I/O flags 1411 */ 1412 pnode->pn_stat &= ~(PNODE_RDIRECT|PNODE_WDIRECT); 1413 1414 *ap->a_recycle = recycle; 1415 1416 mutex_exit(&pnode->pn_sizemtx); 1417 1418 return 0; 1419 } 1420 1421 static void 1422 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1423 { 1424 PUFFS_MSG_VARS(vn, reclaim); 1425 1426 if (!EXISTSOP(pmp, RECLAIM)) 1427 return; 1428 1429 PUFFS_MSG_ALLOC(vn, reclaim); 1430 reclaim_msg->pvnr_nlookup = nlookup; 1431 puffs_msg_setfaf(park_reclaim); 1432 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1433 1434 puffs_msg_enqueue(pmp, park_reclaim); 1435 PUFFS_MSG_RELEASE(reclaim); 1436 return; 1437 } 1438 1439 /* 1440 * always FAF, we don't really care if the server wants to fail to 1441 * reclaim the node or not 1442 */ 1443 int 1444 puffs_vnop_reclaim(void *v) 1445 { 1446 struct vop_reclaim_v2_args /* { 1447 const struct vnodeop_desc *a_desc; 1448 struct vnode *a_vp; 1449 } */ *ap = v; 1450 struct vnode *vp = ap->a_vp; 1451 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1452 bool notifyserver = true; 1453 1454 VOP_UNLOCK(vp); 1455 1456 /* 1457 * first things first: check if someone is trying to reclaim the 1458 * root vnode. do not allow that to travel to userspace. 1459 * Note that we don't need to take the lock similarly to 1460 * puffs_root(), since there is only one of us. 1461 */ 1462 if (vp->v_vflag & VV_ROOT) { 1463 mutex_enter(&pmp->pmp_lock); 1464 KASSERT(pmp->pmp_root != NULL); 1465 pmp->pmp_root = NULL; 1466 mutex_exit(&pmp->pmp_lock); 1467 notifyserver = false; 1468 } 1469 1470 /* 1471 * purge info from kernel before issueing FAF, since we 1472 * don't really know when we'll get around to it after 1473 * that and someone might race us into node creation 1474 */ 1475 mutex_enter(&pmp->pmp_lock); 1476 if (PUFFS_USE_NAMECACHE(pmp)) 1477 cache_purge(vp); 1478 mutex_exit(&pmp->pmp_lock); 1479 1480 if (notifyserver) { 1481 int nlookup = VPTOPP(vp)->pn_nlookup; 1482 1483 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1484 } 1485 1486 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1487 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1488 vrele(VPTOPP(vp)->pn_parent); 1489 else 1490 KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); 1491 } 1492 1493 puffs_putvnode(vp); 1494 1495 return 0; 1496 } 1497 1498 #define CSIZE sizeof(**ap->a_cookies) 1499 int 1500 puffs_vnop_readdir(void *v) 1501 { 1502 struct vop_readdir_args /* { 1503 const struct vnodeop_desc *a_desc; 1504 struct vnode *a_vp; 1505 struct uio *a_uio; 1506 kauth_cred_t a_cred; 1507 int *a_eofflag; 1508 off_t **a_cookies; 1509 int *a_ncookies; 1510 } */ *ap = v; 1511 PUFFS_MSG_VARS(vn, readdir); 1512 struct vnode *vp = ap->a_vp; 1513 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1514 size_t argsize, tomove, cookiemem, cookiesmax; 1515 struct uio *uio = ap->a_uio; 1516 size_t howmuch, resid; 1517 int error; 1518 1519 /* 1520 * ok, so we need: resid + cookiemem = maxreq 1521 * => resid + cookiesize * (resid/minsize) = maxreq 1522 * => resid + cookiesize/minsize * resid = maxreq 1523 * => (cookiesize/minsize + 1) * resid = maxreq 1524 * => resid = maxreq / (cookiesize/minsize + 1) 1525 * 1526 * Since cookiesize <= minsize and we're not very big on floats, 1527 * we approximate that to be 1. Therefore: 1528 * 1529 * resid = maxreq / 2; 1530 * 1531 * Well, at least we didn't have to use differential equations 1532 * or the Gram-Schmidt process. 1533 * 1534 * (yes, I'm very afraid of this) 1535 */ 1536 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1537 1538 if (ap->a_cookies) { 1539 KASSERT(ap->a_ncookies != NULL); 1540 if (pmp->pmp_args.pa_fhsize == 0) 1541 return EOPNOTSUPP; 1542 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1543 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1544 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1545 } else { 1546 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1547 cookiesmax = 0; 1548 cookiemem = 0; 1549 } 1550 1551 argsize = sizeof(struct puffs_vnmsg_readdir); 1552 tomove = resid + cookiemem; 1553 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1554 (void *)&readdir_msg, 1); 1555 1556 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1557 readdir_msg->pvnr_offset = uio->uio_offset; 1558 readdir_msg->pvnr_resid = resid; 1559 readdir_msg->pvnr_ncookies = cookiesmax; 1560 readdir_msg->pvnr_eofflag = 0; 1561 readdir_msg->pvnr_dentoff = cookiemem; 1562 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1563 PUFFS_VN_READDIR, VPTOPNC(vp)); 1564 puffs_msg_setdelta(park_readdir, tomove); 1565 1566 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1567 error = checkerr(pmp, error, __func__); 1568 if (error) 1569 goto out; 1570 1571 /* userspace is cheating? */ 1572 if (readdir_msg->pvnr_resid > resid) { 1573 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1574 "resid grew", VPTOPNC(vp)); 1575 ERROUT(EPROTO); 1576 } 1577 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1578 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1579 "too many cookies", VPTOPNC(vp)); 1580 ERROUT(EPROTO); 1581 } 1582 1583 /* check eof */ 1584 if (readdir_msg->pvnr_eofflag) 1585 *ap->a_eofflag = 1; 1586 1587 /* bouncy-wouncy with the directory data */ 1588 howmuch = resid - readdir_msg->pvnr_resid; 1589 1590 /* force eof if no data was returned (getcwd() needs this) */ 1591 if (howmuch == 0) { 1592 *ap->a_eofflag = 1; 1593 goto out; 1594 } 1595 1596 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1597 if (error) 1598 goto out; 1599 1600 /* provide cookies to caller if so desired */ 1601 if (ap->a_cookies) { 1602 KASSERT(curlwp != uvm.pagedaemon_lwp); 1603 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1604 M_TEMP, M_WAITOK); 1605 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1606 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1607 *ap->a_ncookies*CSIZE); 1608 } 1609 1610 /* next readdir starts here */ 1611 uio->uio_offset = readdir_msg->pvnr_offset; 1612 1613 out: 1614 puffs_msgmem_release(park_readdir); 1615 return error; 1616 } 1617 #undef CSIZE 1618 1619 /* 1620 * poll works by consuming the bitmask in pn_revents. If there are 1621 * events available, poll returns immediately. If not, it issues a 1622 * poll to userspace, selrecords itself and returns with no available 1623 * events. When the file server returns, it executes puffs_parkdone_poll(), 1624 * where available events are added to the bitmask. selnotify() is 1625 * then also executed by that function causing us to enter here again 1626 * and hopefully find the missing bits (unless someone got them first, 1627 * in which case it starts all over again). 1628 */ 1629 int 1630 puffs_vnop_poll(void *v) 1631 { 1632 struct vop_poll_args /* { 1633 const struct vnodeop_desc *a_desc; 1634 struct vnode *a_vp; 1635 int a_events; 1636 } */ *ap = v; 1637 PUFFS_MSG_VARS(vn, poll); 1638 struct vnode *vp = ap->a_vp; 1639 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1640 struct puffs_node *pn = vp->v_data; 1641 int events; 1642 1643 if (EXISTSOP(pmp, POLL)) { 1644 mutex_enter(&pn->pn_mtx); 1645 events = pn->pn_revents & ap->a_events; 1646 if (events & ap->a_events) { 1647 pn->pn_revents &= ~ap->a_events; 1648 mutex_exit(&pn->pn_mtx); 1649 1650 return events; 1651 } else { 1652 puffs_referencenode(pn); 1653 mutex_exit(&pn->pn_mtx); 1654 1655 PUFFS_MSG_ALLOC(vn, poll); 1656 poll_msg->pvnr_events = ap->a_events; 1657 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1658 PUFFS_VN_POLL, VPTOPNC(vp)); 1659 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1660 selrecord(curlwp, &pn->pn_sel); 1661 1662 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1663 vp->v_data, NULL); 1664 PUFFS_MSG_RELEASE(poll); 1665 1666 return 0; 1667 } 1668 } else { 1669 return genfs_poll(v); 1670 } 1671 } 1672 1673 static int 1674 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1675 { 1676 struct puffs_node *pn = VPTOPP(vp); 1677 struct vattr va; 1678 int pflags, error; 1679 1680 /* flush out information from our metacache, see vop_setattr */ 1681 if (pn->pn_stat & PNODE_METACACHE_MASK 1682 && (pn->pn_stat & PNODE_DYING) == 0) { 1683 vattr_null(&va); 1684 error = dosetattr(vp, &va, FSCRED, 1685 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1686 if (error) 1687 return error; 1688 } 1689 1690 /* 1691 * flush pages to avoid being overly dirty 1692 */ 1693 pflags = PGO_CLEANIT; 1694 if (wait) 1695 pflags |= PGO_SYNCIO; 1696 1697 mutex_enter(vp->v_interlock); 1698 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1699 } 1700 1701 int 1702 puffs_vnop_fsync(void *v) 1703 { 1704 struct vop_fsync_args /* { 1705 const struct vnodeop_desc *a_desc; 1706 struct vnode *a_vp; 1707 kauth_cred_t a_cred; 1708 int a_flags; 1709 off_t a_offlo; 1710 off_t a_offhi; 1711 } */ *ap = v; 1712 PUFFS_MSG_VARS(vn, fsync); 1713 struct vnode *vp; 1714 struct puffs_node *pn; 1715 struct puffs_mount *pmp; 1716 int error, dofaf; 1717 1718 vp = ap->a_vp; 1719 KASSERT(vp != NULL); 1720 pn = VPTOPP(vp); 1721 KASSERT(pn != NULL); 1722 pmp = MPTOPUFFSMP(vp->v_mount); 1723 if (ap->a_flags & FSYNC_WAIT) { 1724 mutex_enter(&pn->pn_sizemtx); 1725 } else { 1726 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1727 return EDEADLK; 1728 } 1729 1730 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1731 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1732 if (error) 1733 goto out; 1734 1735 /* 1736 * HELLO! We exit already here if the user server does not 1737 * support fsync OR if we should call fsync for a node which 1738 * has references neither in the kernel or the fs server. 1739 * Otherwise we continue to issue fsync() forward. 1740 */ 1741 error = 0; 1742 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1743 goto out; 1744 1745 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1746 /* 1747 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1748 * only FAFs for those. Otherwise there's a danger of deadlock, 1749 * since the execution context here might be the user server 1750 * doing some operation on another fs, which in turn caused a 1751 * vnode to be reclaimed from the freelist for this fs. 1752 */ 1753 if (dofaf == 0) { 1754 mutex_enter(vp->v_interlock); 1755 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1756 dofaf = 1; 1757 mutex_exit(vp->v_interlock); 1758 } 1759 1760 PUFFS_MSG_ALLOC(vn, fsync); 1761 if (dofaf) 1762 puffs_msg_setfaf(park_fsync); 1763 1764 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1765 fsync_msg->pvnr_flags = ap->a_flags; 1766 fsync_msg->pvnr_offlo = ap->a_offlo; 1767 fsync_msg->pvnr_offhi = ap->a_offhi; 1768 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1769 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1770 1771 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1772 PUFFS_MSG_RELEASE(fsync); 1773 1774 error = checkerr(pmp, error, __func__); 1775 1776 out: 1777 mutex_exit(&pn->pn_sizemtx); 1778 return error; 1779 } 1780 1781 int 1782 puffs_vnop_seek(void *v) 1783 { 1784 struct vop_seek_args /* { 1785 const struct vnodeop_desc *a_desc; 1786 struct vnode *a_vp; 1787 off_t a_oldoff; 1788 off_t a_newoff; 1789 kauth_cred_t a_cred; 1790 } */ *ap = v; 1791 PUFFS_MSG_VARS(vn, seek); 1792 struct vnode *vp = ap->a_vp; 1793 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1794 int error; 1795 1796 PUFFS_MSG_ALLOC(vn, seek); 1797 seek_msg->pvnr_oldoff = ap->a_oldoff; 1798 seek_msg->pvnr_newoff = ap->a_newoff; 1799 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1800 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1801 PUFFS_VN_SEEK, VPTOPNC(vp)); 1802 1803 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1804 PUFFS_MSG_RELEASE(seek); 1805 return checkerr(pmp, error, __func__); 1806 } 1807 1808 static int 1809 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1810 struct componentname *cnp) 1811 { 1812 PUFFS_MSG_VARS(vn, remove); 1813 int error; 1814 1815 PUFFS_MSG_ALLOC(vn, remove); 1816 remove_msg->pvnr_cookie_targ = ck; 1817 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1818 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1819 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1820 1821 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1822 PUFFS_MSG_RELEASE(remove); 1823 1824 return checkerr(pmp, error, __func__); 1825 } 1826 1827 /* 1828 * XXX: can't use callremove now because can't catch setbacks with 1829 * it due to lack of a pnode argument. 1830 */ 1831 int 1832 puffs_vnop_remove(void *v) 1833 { 1834 struct vop_remove_v2_args /* { 1835 const struct vnodeop_desc *a_desc; 1836 struct vnode *a_dvp; 1837 struct vnode *a_vp; 1838 struct componentname *a_cnp; 1839 } */ *ap = v; 1840 PUFFS_MSG_VARS(vn, remove); 1841 struct vnode *dvp = ap->a_dvp; 1842 struct vnode *vp = ap->a_vp; 1843 struct puffs_node *dpn = VPTOPP(dvp); 1844 struct puffs_node *pn = VPTOPP(vp); 1845 struct componentname *cnp = ap->a_cnp; 1846 struct mount *mp = dvp->v_mount; 1847 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1848 int error; 1849 1850 PUFFS_MSG_ALLOC(vn, remove); 1851 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1852 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1853 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1854 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1855 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1856 1857 puffs_msg_enqueue(pmp, park_remove); 1858 vref(dvp); /* hang onto caller's reference at end */ 1859 REFPN(dpn); 1860 if (dvp == vp) 1861 REFPN(pn); 1862 else 1863 REFPN_AND_UNLOCKVP(vp, pn); 1864 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1865 1866 PUFFS_MSG_RELEASE(remove); 1867 1868 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1869 1870 RELEPN_AND_VP(dvp, dpn); 1871 RELEPN_AND_VP(vp, pn); 1872 1873 error = checkerr(pmp, error, __func__); 1874 return error; 1875 } 1876 1877 int 1878 puffs_vnop_mkdir(void *v) 1879 { 1880 struct vop_mkdir_v3_args /* { 1881 const struct vnodeop_desc *a_desc; 1882 struct vnode *a_dvp; 1883 struct vnode **a_vpp; 1884 struct componentname *a_cnp; 1885 struct vattr *a_vap; 1886 } */ *ap = v; 1887 PUFFS_MSG_VARS(vn, mkdir); 1888 struct vnode *dvp = ap->a_dvp; 1889 struct puffs_node *dpn = VPTOPP(dvp); 1890 struct componentname *cnp = ap->a_cnp; 1891 struct mount *mp = dvp->v_mount; 1892 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1893 int error; 1894 1895 PUFFS_MSG_ALLOC(vn, mkdir); 1896 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1897 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1898 mkdir_msg->pvnr_va = *ap->a_vap; 1899 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1900 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1901 1902 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1903 1904 error = checkerr(pmp, error, __func__); 1905 if (error) 1906 goto out; 1907 1908 error = puffs_newnode(mp, dvp, ap->a_vpp, 1909 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1910 if (error) { 1911 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1912 mkdir_msg->pvnr_newnode, cnp); 1913 goto out; 1914 } 1915 1916 if (PUFFS_USE_FS_TTL(pmp)) { 1917 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1918 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1919 struct vattr *rvap = &mkdir_msg->pvnr_va; 1920 1921 update_va(*ap->a_vpp, NULL, rvap, 1922 va_ttl, cn_ttl, SETATTR_CHSIZE); 1923 } 1924 1925 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1926 1927 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1928 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1929 update_parent(*ap->a_vpp, dvp); 1930 1931 out: 1932 PUFFS_MSG_RELEASE(mkdir); 1933 return error; 1934 } 1935 1936 static int 1937 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1938 struct componentname *cnp) 1939 { 1940 PUFFS_MSG_VARS(vn, rmdir); 1941 int error; 1942 1943 PUFFS_MSG_ALLOC(vn, rmdir); 1944 rmdir_msg->pvnr_cookie_targ = ck; 1945 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1946 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1947 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1948 1949 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1950 PUFFS_MSG_RELEASE(rmdir); 1951 1952 return checkerr(pmp, error, __func__); 1953 } 1954 1955 int 1956 puffs_vnop_rmdir(void *v) 1957 { 1958 struct vop_rmdir_v2_args /* { 1959 const struct vnodeop_desc *a_desc; 1960 struct vnode *a_dvp; 1961 struct vnode *a_vp; 1962 struct componentname *a_cnp; 1963 } */ *ap = v; 1964 PUFFS_MSG_VARS(vn, rmdir); 1965 struct vnode *dvp = ap->a_dvp; 1966 struct vnode *vp = ap->a_vp; 1967 struct puffs_node *dpn = VPTOPP(dvp); 1968 struct puffs_node *pn = VPTOPP(vp); 1969 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1970 struct componentname *cnp = ap->a_cnp; 1971 int error; 1972 1973 PUFFS_MSG_ALLOC(vn, rmdir); 1974 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1975 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1976 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1977 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1978 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1979 1980 puffs_msg_enqueue(pmp, park_rmdir); 1981 vref(dvp); /* hang onto caller's reference at end */ 1982 KASSERTMSG((dvp != vp), "rmdir ."); 1983 REFPN(dpn); 1984 REFPN_AND_UNLOCKVP(vp, pn); 1985 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1986 1987 PUFFS_MSG_RELEASE(rmdir); 1988 1989 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1990 1991 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1992 RELEPN_AND_VP(dvp, dpn); 1993 RELEPN_AND_VP(vp, pn); 1994 1995 return error; 1996 } 1997 1998 int 1999 puffs_vnop_link(void *v) 2000 { 2001 struct vop_link_v2_args /* { 2002 const struct vnodeop_desc *a_desc; 2003 struct vnode *a_dvp; 2004 struct vnode *a_vp; 2005 struct componentname *a_cnp; 2006 } */ *ap = v; 2007 PUFFS_MSG_VARS(vn, link); 2008 struct vnode *dvp = ap->a_dvp; 2009 struct vnode *vp = ap->a_vp; 2010 struct puffs_node *dpn = VPTOPP(dvp); 2011 struct puffs_node *pn = VPTOPP(vp); 2012 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2013 struct componentname *cnp = ap->a_cnp; 2014 int error; 2015 2016 PUFFS_MSG_ALLOC(vn, link); 2017 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 2018 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 2019 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2020 puffs_msg_setinfo(park_link, PUFFSOP_VN, 2021 PUFFS_VN_LINK, VPTOPNC(dvp)); 2022 2023 puffs_msg_enqueue(pmp, park_link); 2024 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 2025 2026 PUFFS_MSG_RELEASE(link); 2027 2028 error = checkerr(pmp, error, __func__); 2029 2030 /* 2031 * XXX: stay in touch with the cache. I don't like this, but 2032 * don't have a better solution either. See also puffs_rename(). 2033 */ 2034 if (error == 0) { 2035 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 2036 puffs_updatenode(VPTOPP(dvp), 2037 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2038 } 2039 2040 return error; 2041 } 2042 2043 int 2044 puffs_vnop_symlink(void *v) 2045 { 2046 struct vop_symlink_v3_args /* { 2047 const struct vnodeop_desc *a_desc; 2048 struct vnode *a_dvp; 2049 struct vnode **a_vpp; 2050 struct componentname *a_cnp; 2051 struct vattr *a_vap; 2052 char *a_target; 2053 } */ *ap = v; 2054 PUFFS_MSG_VARS(vn, symlink); 2055 struct vnode *dvp = ap->a_dvp; 2056 struct puffs_node *dpn = VPTOPP(dvp); 2057 struct mount *mp = dvp->v_mount; 2058 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2059 struct componentname *cnp = ap->a_cnp; 2060 int error; 2061 2062 *ap->a_vpp = NULL; 2063 2064 PUFFS_MSG_ALLOC(vn, symlink); 2065 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2066 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2067 symlink_msg->pvnr_va = *ap->a_vap; 2068 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2069 sizeof(symlink_msg->pvnr_link)); 2070 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2071 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2072 2073 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2074 2075 error = checkerr(pmp, error, __func__); 2076 if (error) 2077 goto out; 2078 2079 error = puffs_newnode(mp, dvp, ap->a_vpp, 2080 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2081 if (error) { 2082 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2083 symlink_msg->pvnr_newnode, cnp); 2084 goto out; 2085 } 2086 2087 if (PUFFS_USE_FS_TTL(pmp)) { 2088 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2089 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2090 struct vattr *rvap = &symlink_msg->pvnr_va; 2091 2092 update_va(*ap->a_vpp, NULL, rvap, 2093 va_ttl, cn_ttl, SETATTR_CHSIZE); 2094 } 2095 2096 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2097 2098 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2099 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2100 update_parent(*ap->a_vpp, dvp); 2101 2102 out: 2103 PUFFS_MSG_RELEASE(symlink); 2104 2105 return error; 2106 } 2107 2108 int 2109 puffs_vnop_readlink(void *v) 2110 { 2111 struct vop_readlink_args /* { 2112 const struct vnodeop_desc *a_desc; 2113 struct vnode *a_vp; 2114 struct uio *a_uio; 2115 kauth_cred_t a_cred; 2116 } */ *ap = v; 2117 PUFFS_MSG_VARS(vn, readlink); 2118 struct vnode *vp = ap->a_vp; 2119 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2120 size_t linklen; 2121 int error; 2122 2123 PUFFS_MSG_ALLOC(vn, readlink); 2124 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2125 linklen = sizeof(readlink_msg->pvnr_link); 2126 readlink_msg->pvnr_linklen = linklen; 2127 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2128 PUFFS_VN_READLINK, VPTOPNC(vp)); 2129 2130 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2131 error = checkerr(pmp, error, __func__); 2132 if (error) 2133 goto out; 2134 2135 /* bad bad user file server */ 2136 if (readlink_msg->pvnr_linklen > linklen) { 2137 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2138 "linklen too big", VPTOPNC(ap->a_vp)); 2139 error = EPROTO; 2140 goto out; 2141 } 2142 2143 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2144 ap->a_uio); 2145 out: 2146 PUFFS_MSG_RELEASE(readlink); 2147 return error; 2148 } 2149 2150 int 2151 puffs_vnop_rename(void *v) 2152 { 2153 struct vop_rename_args /* { 2154 const struct vnodeop_desc *a_desc; 2155 struct vnode *a_fdvp; 2156 struct vnode *a_fvp; 2157 struct componentname *a_fcnp; 2158 struct vnode *a_tdvp; 2159 struct vnode *a_tvp; 2160 struct componentname *a_tcnp; 2161 } */ *ap = v; 2162 PUFFS_MSG_VARS(vn, rename); 2163 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2164 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2165 struct puffs_node *fpn = ap->a_fvp->v_data; 2166 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2167 int error; 2168 bool doabort = true; 2169 2170 if ((fvp->v_mount != tdvp->v_mount) || 2171 (tvp && (fvp->v_mount != tvp->v_mount))) { 2172 ERROUT(EXDEV); 2173 } 2174 2175 PUFFS_MSG_ALLOC(vn, rename); 2176 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2177 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2178 if (tvp) 2179 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2180 else 2181 rename_msg->pvnr_cookie_targ = NULL; 2182 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2183 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2184 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2185 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2186 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2187 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2188 2189 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2190 doabort = false; 2191 PUFFS_MSG_RELEASE(rename); 2192 error = checkerr(pmp, error, __func__); 2193 2194 /* 2195 * XXX: stay in touch with the cache. I don't like this, but 2196 * don't have a better solution either. See also puffs_link(). 2197 */ 2198 if (error == 0) { 2199 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2200 puffs_updatenode(VPTOPP(fdvp), 2201 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2202 if (fdvp != tdvp) 2203 puffs_updatenode(VPTOPP(tdvp), 2204 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 2205 0); 2206 2207 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2208 (VPTOPP(fvp)->pn_parent != tdvp)) 2209 update_parent(fvp, tdvp); 2210 } 2211 2212 2213 out: 2214 if (doabort) 2215 VOP_ABORTOP(tdvp, ap->a_tcnp); 2216 if (tvp != NULL) 2217 vput(tvp); 2218 if (tdvp == tvp) 2219 vrele(tdvp); 2220 else 2221 vput(tdvp); 2222 2223 if (doabort) 2224 VOP_ABORTOP(fdvp, ap->a_fcnp); 2225 vrele(fdvp); 2226 vrele(fvp); 2227 2228 return error; 2229 } 2230 2231 #define RWARGS(cont, iofl, move, offset, creds) \ 2232 (cont)->pvnr_ioflag = (iofl); \ 2233 (cont)->pvnr_resid = (move); \ 2234 (cont)->pvnr_offset = (offset); \ 2235 puffs_credcvt(&(cont)->pvnr_cred, creds) 2236 2237 int 2238 puffs_vnop_read(void *v) 2239 { 2240 struct vop_read_args /* { 2241 const struct vnodeop_desc *a_desc; 2242 struct vnode *a_vp; 2243 struct uio *a_uio; 2244 int a_ioflag; 2245 kauth_cred_t a_cred; 2246 } */ *ap = v; 2247 PUFFS_MSG_VARS(vn, read); 2248 struct vnode *vp = ap->a_vp; 2249 struct puffs_node *pn = VPTOPP(vp); 2250 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2251 struct uio *uio = ap->a_uio; 2252 size_t tomove, argsize; 2253 vsize_t bytelen; 2254 int error; 2255 2256 read_msg = NULL; 2257 error = 0; 2258 2259 /* std sanity */ 2260 if (uio->uio_resid == 0) 2261 return 0; 2262 if (uio->uio_offset < 0) 2263 return EFBIG; 2264 2265 /* 2266 * On the case of reading empty files and (vp->v_size != 0) below: 2267 * some filesystems (hint: FUSE and distributed filesystems) still 2268 * expect to get the READ in order to update atime. Reading through 2269 * the case filters empty files, therefore we prefer to bypass the 2270 * cache here. 2271 */ 2272 if (vp->v_type == VREG && 2273 PUFFS_USE_PAGECACHE(pmp) && 2274 !(pn->pn_stat & PNODE_RDIRECT) && 2275 (vp->v_size != 0)) { 2276 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2277 2278 while (uio->uio_resid > 0) { 2279 if (vp->v_size <= uio->uio_offset) { 2280 break; 2281 } 2282 bytelen = MIN(uio->uio_resid, 2283 vp->v_size - uio->uio_offset); 2284 if (bytelen == 0) 2285 break; 2286 2287 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2288 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2289 if (error) 2290 break; 2291 } 2292 2293 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2294 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2295 } else { 2296 /* 2297 * in case it's not a regular file or we're operating 2298 * uncached, do read in the old-fashioned style, 2299 * i.e. explicit read operations 2300 */ 2301 2302 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2303 argsize = sizeof(struct puffs_vnmsg_read); 2304 puffs_msgmem_alloc(argsize + tomove, &park_read, 2305 (void *)&read_msg, 1); 2306 2307 error = 0; 2308 while (uio->uio_resid > 0) { 2309 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2310 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2311 RWARGS(read_msg, ap->a_ioflag, tomove, 2312 uio->uio_offset, ap->a_cred); 2313 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2314 PUFFS_VN_READ, VPTOPNC(vp)); 2315 puffs_msg_setdelta(park_read, tomove); 2316 2317 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2318 NULL, error); 2319 error = checkerr(pmp, error, __func__); 2320 if (error) 2321 break; 2322 2323 if (read_msg->pvnr_resid > tomove) { 2324 puffs_senderr(pmp, PUFFS_ERR_READ, 2325 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2326 error = EPROTO; 2327 break; 2328 } 2329 2330 error = uiomove(read_msg->pvnr_data, 2331 tomove - read_msg->pvnr_resid, uio); 2332 2333 /* 2334 * in case the file is out of juice, resid from 2335 * userspace is != 0. and the error-case is 2336 * quite obvious 2337 */ 2338 if (error || read_msg->pvnr_resid) 2339 break; 2340 } 2341 2342 puffs_msgmem_release(park_read); 2343 } 2344 2345 return error; 2346 } 2347 2348 /* 2349 * XXX: in case of a failure, this leaves uio in a bad state. 2350 * We could theoretically copy the uio and iovecs and "replay" 2351 * them the right amount after the userspace trip, but don't 2352 * bother for now. 2353 */ 2354 int 2355 puffs_vnop_write(void *v) 2356 { 2357 struct vop_write_args /* { 2358 const struct vnodeop_desc *a_desc; 2359 struct vnode *a_vp; 2360 struct uio *a_uio; 2361 int a_ioflag; 2362 kauth_cred_t a_cred; 2363 } */ *ap = v; 2364 PUFFS_MSG_VARS(vn, write); 2365 struct vnode *vp = ap->a_vp; 2366 struct puffs_node *pn = VPTOPP(vp); 2367 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2368 struct uio *uio = ap->a_uio; 2369 size_t tomove, argsize; 2370 off_t oldoff, newoff, origoff; 2371 vsize_t bytelen; 2372 int error, uflags; 2373 int ubcflags; 2374 2375 error = uflags = 0; 2376 write_msg = NULL; 2377 2378 /* std sanity */ 2379 if (uio->uio_resid == 0) 2380 return 0; 2381 if (uio->uio_offset < 0) 2382 return EFBIG; 2383 2384 mutex_enter(&pn->pn_sizemtx); 2385 2386 /* 2387 * userspace *should* be allowed to control this, 2388 * but with UBC it's a bit unclear how to handle it 2389 */ 2390 if (ap->a_ioflag & IO_APPEND) 2391 uio->uio_offset = vp->v_size; 2392 2393 origoff = uio->uio_offset; 2394 2395 if (vp->v_type == VREG && 2396 PUFFS_USE_PAGECACHE(pmp) && 2397 !(pn->pn_stat & PNODE_WDIRECT)) { 2398 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2399 2400 while (uio->uio_resid > 0) { 2401 oldoff = uio->uio_offset; 2402 bytelen = uio->uio_resid; 2403 2404 newoff = oldoff + bytelen; 2405 if (vp->v_size < newoff) { 2406 uvm_vnp_setwritesize(vp, newoff); 2407 } 2408 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2409 UVM_ADV_RANDOM, ubcflags); 2410 2411 /* 2412 * In case of a ubc_uiomove() error, 2413 * opt to not extend the file at all and 2414 * return an error. Otherwise, if we attempt 2415 * to clear the memory we couldn't fault to, 2416 * we might generate a kernel page fault. 2417 */ 2418 if (vp->v_size < newoff) { 2419 if (error == 0) { 2420 uflags |= PUFFS_UPDATESIZE; 2421 uvm_vnp_setsize(vp, newoff); 2422 } else { 2423 uvm_vnp_setwritesize(vp, vp->v_size); 2424 } 2425 } 2426 if (error) 2427 break; 2428 2429 /* 2430 * If we're writing large files, flush to file server 2431 * every 64k. Otherwise we can very easily exhaust 2432 * kernel and user memory, as the file server cannot 2433 * really keep up with our writing speed. 2434 * 2435 * Note: this does *NOT* honor MNT_ASYNC, because 2436 * that gives userland too much say in the kernel. 2437 */ 2438 if (oldoff >> 16 != uio->uio_offset >> 16) { 2439 mutex_enter(vp->v_interlock); 2440 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2441 uio->uio_offset & ~0xffff, 2442 PGO_CLEANIT | PGO_SYNCIO); 2443 if (error) 2444 break; 2445 } 2446 } 2447 2448 /* synchronous I/O? */ 2449 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2450 mutex_enter(vp->v_interlock); 2451 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2452 round_page(uio->uio_offset), 2453 PGO_CLEANIT | PGO_SYNCIO); 2454 2455 /* write through page cache? */ 2456 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2457 mutex_enter(vp->v_interlock); 2458 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2459 round_page(uio->uio_offset), PGO_CLEANIT); 2460 } 2461 } else { 2462 /* tomove is non-increasing */ 2463 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2464 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2465 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2466 2467 while (uio->uio_resid > 0) { 2468 /* move data to buffer */ 2469 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2470 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2471 RWARGS(write_msg, ap->a_ioflag, tomove, 2472 uio->uio_offset, ap->a_cred); 2473 error = uiomove(write_msg->pvnr_data, tomove, uio); 2474 if (error) 2475 break; 2476 2477 /* move buffer to userspace */ 2478 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2479 PUFFS_VN_WRITE, VPTOPNC(vp)); 2480 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2481 NULL, error); 2482 error = checkerr(pmp, error, __func__); 2483 if (error) 2484 break; 2485 2486 if (write_msg->pvnr_resid > tomove) { 2487 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2488 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2489 error = EPROTO; 2490 break; 2491 } 2492 2493 /* adjust file size */ 2494 if (vp->v_size < uio->uio_offset) { 2495 uflags |= PUFFS_UPDATESIZE; 2496 uvm_vnp_setsize(vp, uio->uio_offset); 2497 } 2498 2499 /* didn't move everything? bad userspace. bail */ 2500 if (write_msg->pvnr_resid != 0) { 2501 error = EIO; 2502 break; 2503 } 2504 } 2505 puffs_msgmem_release(park_write); 2506 2507 /* 2508 * Direct I/O on write but not on read: we must 2509 * invlidate the written pages so that we read 2510 * the written data and not the stalled cache. 2511 */ 2512 if ((error == 0) && 2513 (vp->v_type == VREG) && PUFFS_USE_PAGECACHE(pmp) && 2514 (pn->pn_stat & PNODE_WDIRECT) && 2515 !(pn->pn_stat & PNODE_RDIRECT)) { 2516 voff_t off_lo = trunc_page(origoff); 2517 voff_t off_hi = round_page(uio->uio_offset); 2518 2519 mutex_enter(vp->v_uobj.vmobjlock); 2520 error = VOP_PUTPAGES(vp, off_lo, off_hi, PGO_FREE); 2521 } 2522 } 2523 2524 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2525 uflags |= PUFFS_UPDATEATIME; 2526 uflags |= PUFFS_UPDATECTIME; 2527 uflags |= PUFFS_UPDATEMTIME; 2528 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2529 2530 /* 2531 * If we do not use meta flush, we need to update the 2532 * filesystem now, otherwise we will get a stale value 2533 * on the next GETATTR 2534 */ 2535 if (!PUFFS_USE_METAFLUSH(pmp) && (uflags & PUFFS_UPDATESIZE)) { 2536 struct vattr va; 2537 int ret; 2538 2539 vattr_null(&va); 2540 va.va_size = vp->v_size; 2541 ret = dosetattr(vp, &va, FSCRED, 0); 2542 if (ret) { 2543 DPRINTF(("dosetattr set size to %jd failed: %d\n", 2544 (intmax_t)vp->v_size, ret)); 2545 } 2546 } 2547 mutex_exit(&pn->pn_sizemtx); 2548 return error; 2549 } 2550 2551 int 2552 puffs_vnop_fallocate(void *v) 2553 { 2554 struct vop_fallocate_args /* { 2555 const struct vnodeop_desc *a_desc; 2556 struct vnode *a_vp; 2557 off_t a_pos; 2558 off_t a_len; 2559 } */ *ap = v; 2560 struct vnode *vp = ap->a_vp; 2561 struct puffs_node *pn = VPTOPP(vp); 2562 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2563 PUFFS_MSG_VARS(vn, fallocate); 2564 int error; 2565 2566 mutex_enter(&pn->pn_sizemtx); 2567 2568 PUFFS_MSG_ALLOC(vn, fallocate); 2569 fallocate_msg->pvnr_off = ap->a_pos; 2570 fallocate_msg->pvnr_len = ap->a_len; 2571 puffs_msg_setinfo(park_fallocate, PUFFSOP_VN, 2572 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2573 2574 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fallocate, vp->v_data, NULL, error); 2575 error = checkerr(pmp, error, __func__); 2576 PUFFS_MSG_RELEASE(fallocate); 2577 2578 switch (error) { 2579 case 0: 2580 break; 2581 case EAGAIN: 2582 error = EIO; 2583 /* FALLTHROUGH */ 2584 default: 2585 goto out; 2586 } 2587 2588 if (ap->a_pos + ap->a_len > vp->v_size) { 2589 uvm_vnp_setsize(vp, ap->a_pos + ap->a_len); 2590 puffs_updatenode(pn, PUFFS_UPDATESIZE, vp->v_size); 2591 } 2592 out: 2593 mutex_exit(&pn->pn_sizemtx); 2594 2595 return error; 2596 } 2597 2598 int 2599 puffs_vnop_fdiscard(void *v) 2600 { 2601 struct vop_fdiscard_args /* { 2602 const struct vnodeop_desc *a_desc; 2603 struct vnode *a_vp; 2604 off_t a_pos; 2605 off_t a_len; 2606 } */ *ap = v; 2607 struct vnode *vp = ap->a_vp; 2608 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2609 PUFFS_MSG_VARS(vn, fdiscard); 2610 int error; 2611 2612 PUFFS_MSG_ALLOC(vn, fdiscard); 2613 fdiscard_msg->pvnr_off = ap->a_pos; 2614 fdiscard_msg->pvnr_len = ap->a_len; 2615 puffs_msg_setinfo(park_fdiscard, PUFFSOP_VN, 2616 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2617 2618 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fdiscard, vp->v_data, NULL, error); 2619 error = checkerr(pmp, error, __func__); 2620 PUFFS_MSG_RELEASE(fdiscard); 2621 2622 return error; 2623 } 2624 2625 int 2626 puffs_vnop_print(void *v) 2627 { 2628 struct vop_print_args /* { 2629 struct vnode *a_vp; 2630 } */ *ap = v; 2631 PUFFS_MSG_VARS(vn, print); 2632 struct vnode *vp = ap->a_vp; 2633 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2634 struct puffs_node *pn = vp->v_data; 2635 2636 /* kernel portion */ 2637 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2638 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2639 if (vp->v_type == VFIFO) 2640 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2641 printf("\n"); 2642 2643 /* userspace portion */ 2644 if (EXISTSOP(pmp, PRINT)) { 2645 PUFFS_MSG_ALLOC(vn, print); 2646 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2647 PUFFS_VN_PRINT, VPTOPNC(vp)); 2648 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2649 NULL); 2650 PUFFS_MSG_RELEASE(print); 2651 } 2652 2653 return 0; 2654 } 2655 2656 int 2657 puffs_vnop_pathconf(void *v) 2658 { 2659 struct vop_pathconf_args /* { 2660 const struct vnodeop_desc *a_desc; 2661 struct vnode *a_vp; 2662 int a_name; 2663 register_t *a_retval; 2664 } */ *ap = v; 2665 PUFFS_MSG_VARS(vn, pathconf); 2666 struct vnode *vp = ap->a_vp; 2667 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2668 int error; 2669 2670 PUFFS_MSG_ALLOC(vn, pathconf); 2671 pathconf_msg->pvnr_name = ap->a_name; 2672 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2673 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2674 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2675 error = checkerr(pmp, error, __func__); 2676 if (!error) 2677 *ap->a_retval = pathconf_msg->pvnr_retval; 2678 PUFFS_MSG_RELEASE(pathconf); 2679 2680 return error; 2681 } 2682 2683 int 2684 puffs_vnop_advlock(void *v) 2685 { 2686 struct vop_advlock_args /* { 2687 const struct vnodeop_desc *a_desc; 2688 struct vnode *a_vp; 2689 void *a_id; 2690 int a_op; 2691 struct flock *a_fl; 2692 int a_flags; 2693 } */ *ap = v; 2694 PUFFS_MSG_VARS(vn, advlock); 2695 struct vnode *vp = ap->a_vp; 2696 struct puffs_node *pn = VPTOPP(vp); 2697 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2698 int error; 2699 2700 if (!EXISTSOP(pmp, ADVLOCK)) 2701 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2702 2703 PUFFS_MSG_ALLOC(vn, advlock); 2704 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2705 sizeof(advlock_msg->pvnr_fl)); 2706 advlock_msg->pvnr_id = ap->a_id; 2707 advlock_msg->pvnr_op = ap->a_op; 2708 advlock_msg->pvnr_flags = ap->a_flags; 2709 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2710 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2711 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2712 error = checkerr(pmp, error, __func__); 2713 PUFFS_MSG_RELEASE(advlock); 2714 2715 return error; 2716 } 2717 2718 int 2719 puffs_vnop_abortop(void *v) 2720 { 2721 struct vop_abortop_args /* { 2722 struct vnode *a_dvp; 2723 struct componentname *a_cnp; 2724 }; */ *ap = v; 2725 PUFFS_MSG_VARS(vn, abortop); 2726 struct vnode *dvp = ap->a_dvp; 2727 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2728 struct componentname *cnp = ap->a_cnp; 2729 2730 if (EXISTSOP(pmp, ABORTOP)) { 2731 PUFFS_MSG_ALLOC(vn, abortop); 2732 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2733 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2734 puffs_msg_setfaf(park_abortop); 2735 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2736 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2737 2738 puffs_msg_enqueue(pmp, park_abortop); 2739 PUFFS_MSG_RELEASE(abortop); 2740 } 2741 2742 return genfs_abortop(v); 2743 } 2744 2745 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2746 2747 /* 2748 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2749 */ 2750 int 2751 puffs_vnop_strategy(void *v) 2752 { 2753 struct vop_strategy_args /* { 2754 const struct vnodeop_desc *a_desc; 2755 struct vnode *a_vp; 2756 struct buf *a_bp; 2757 } */ *ap = v; 2758 PUFFS_MSG_VARS(vn, rw); 2759 struct vnode *vp = ap->a_vp; 2760 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2761 struct puffs_node *pn; 2762 struct buf *bp; 2763 size_t argsize; 2764 size_t tomove, moved; 2765 int error, dofaf, cansleep, dobiodone; 2766 2767 pmp = MPTOPUFFSMP(vp->v_mount); 2768 bp = ap->a_bp; 2769 error = 0; 2770 dofaf = 0; 2771 cansleep = 0; 2772 pn = VPTOPP(vp); 2773 park_rw = NULL; /* explicit */ 2774 dobiodone = 1; 2775 2776 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2777 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2778 ERROUT(EOPNOTSUPP); 2779 2780 /* 2781 * Short-circuit optimization: don't flush buffer in between 2782 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2783 */ 2784 if (pn->pn_stat & PNODE_DYING) { 2785 KASSERT(BUF_ISWRITE(bp)); 2786 bp->b_resid = 0; 2787 goto out; 2788 } 2789 2790 #ifdef DIAGNOSTIC 2791 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2792 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2793 bp->b_bcount); 2794 #endif 2795 2796 /* 2797 * See explanation for the necessity of a FAF in puffs_fsync. 2798 * 2799 * Also, do FAF in case we're suspending. 2800 * See puffs_vfsops.c:pageflush() 2801 */ 2802 if (BUF_ISWRITE(bp)) { 2803 mutex_enter(vp->v_interlock); 2804 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2805 dofaf = 1; 2806 if (pn->pn_stat & PNODE_FAF) 2807 dofaf = 1; 2808 mutex_exit(vp->v_interlock); 2809 } 2810 2811 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2812 2813 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2814 2815 /* allocate transport structure */ 2816 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2817 argsize = sizeof(struct puffs_vnmsg_rw); 2818 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2819 (void *)&rw_msg, cansleep); 2820 if (error) 2821 goto out; 2822 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2823 2824 /* 2x2 cases: read/write, faf/nofaf */ 2825 if (BUF_ISREAD(bp)) { 2826 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2827 PUFFS_VN_READ, VPTOPNC(vp)); 2828 puffs_msg_setdelta(park_rw, tomove); 2829 if (BIOASYNC(bp)) { 2830 puffs_msg_setcall(park_rw, 2831 puffs_parkdone_asyncbioread, bp); 2832 puffs_msg_enqueue(pmp, park_rw); 2833 dobiodone = 0; 2834 } else { 2835 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2836 NULL, error); 2837 error = checkerr(pmp, error, __func__); 2838 if (error) 2839 goto out; 2840 2841 if (rw_msg->pvnr_resid > tomove) { 2842 puffs_senderr(pmp, PUFFS_ERR_READ, 2843 E2BIG, "resid grew", VPTOPNC(vp)); 2844 ERROUT(EPROTO); 2845 } 2846 2847 moved = tomove - rw_msg->pvnr_resid; 2848 2849 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2850 bp->b_resid = bp->b_bcount - moved; 2851 } 2852 } else { 2853 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2854 PUFFS_VN_WRITE, VPTOPNC(vp)); 2855 /* 2856 * make pages read-only before we write them if we want 2857 * write caching info 2858 */ 2859 if (PUFFS_WCACHEINFO(pmp)) { 2860 struct uvm_object *uobj = &vp->v_uobj; 2861 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2862 struct vm_page *vmp; 2863 int i; 2864 2865 for (i = 0; i < npages; i++) { 2866 vmp= uvm_pageratop((vaddr_t)bp->b_data 2867 + (i << PAGE_SHIFT)); 2868 DPRINTF(("puffs_strategy: write-protecting " 2869 "vp %p page %p, offset %" PRId64"\n", 2870 vp, vmp, vmp->offset)); 2871 mutex_enter(uobj->vmobjlock); 2872 vmp->flags |= PG_RDONLY; 2873 pmap_page_protect(vmp, VM_PROT_READ); 2874 mutex_exit(uobj->vmobjlock); 2875 } 2876 } 2877 2878 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2879 if (dofaf) { 2880 puffs_msg_setfaf(park_rw); 2881 } else if (BIOASYNC(bp)) { 2882 puffs_msg_setcall(park_rw, 2883 puffs_parkdone_asyncbiowrite, bp); 2884 dobiodone = 0; 2885 } 2886 2887 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2888 2889 if (dobiodone == 0) 2890 goto out; 2891 2892 error = checkerr(pmp, error, __func__); 2893 if (error) 2894 goto out; 2895 2896 if (rw_msg->pvnr_resid > tomove) { 2897 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2898 E2BIG, "resid grew", VPTOPNC(vp)); 2899 ERROUT(EPROTO); 2900 } 2901 2902 /* 2903 * FAF moved everything. Frankly, we don't 2904 * really have a choice. 2905 */ 2906 if (dofaf && error == 0) 2907 moved = tomove; 2908 else 2909 moved = tomove - rw_msg->pvnr_resid; 2910 2911 bp->b_resid = bp->b_bcount - moved; 2912 if (bp->b_resid != 0) { 2913 ERROUT(EIO); 2914 } 2915 } 2916 2917 out: 2918 if (park_rw) 2919 puffs_msgmem_release(park_rw); 2920 2921 if (error) 2922 bp->b_error = error; 2923 2924 if (error || dobiodone) 2925 biodone(bp); 2926 2927 return error; 2928 } 2929 2930 int 2931 puffs_vnop_mmap(void *v) 2932 { 2933 struct vop_mmap_args /* { 2934 const struct vnodeop_desc *a_desc; 2935 struct vnode *a_vp; 2936 vm_prot_t a_prot; 2937 kauth_cred_t a_cred; 2938 } */ *ap = v; 2939 PUFFS_MSG_VARS(vn, mmap); 2940 struct vnode *vp = ap->a_vp; 2941 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2942 int error; 2943 2944 if (!PUFFS_USE_PAGECACHE(pmp)) 2945 return genfs_eopnotsupp(v); 2946 2947 if (EXISTSOP(pmp, MMAP)) { 2948 PUFFS_MSG_ALLOC(vn, mmap); 2949 mmap_msg->pvnr_prot = ap->a_prot; 2950 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2951 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2952 PUFFS_VN_MMAP, VPTOPNC(vp)); 2953 2954 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2955 error = checkerr(pmp, error, __func__); 2956 PUFFS_MSG_RELEASE(mmap); 2957 } else { 2958 error = genfs_mmap(v); 2959 } 2960 2961 return error; 2962 } 2963 2964 2965 /* 2966 * The rest don't get a free trip to userspace and back, they 2967 * have to stay within the kernel. 2968 */ 2969 2970 /* 2971 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2972 * well, maybe somehow, somewhere, some day .... 2973 */ 2974 int 2975 puffs_vnop_bmap(void *v) 2976 { 2977 struct vop_bmap_args /* { 2978 const struct vnodeop_desc *a_desc; 2979 struct vnode *a_vp; 2980 daddr_t a_bn; 2981 struct vnode **a_vpp; 2982 daddr_t *a_bnp; 2983 int *a_runp; 2984 } */ *ap = v; 2985 struct puffs_mount *pmp; 2986 2987 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2988 2989 if (ap->a_vpp) 2990 *ap->a_vpp = ap->a_vp; 2991 if (ap->a_bnp) 2992 *ap->a_bnp = ap->a_bn; 2993 if (ap->a_runp) 2994 *ap->a_runp 2995 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2996 2997 return 0; 2998 } 2999 3000 /* 3001 * Handle getpages faults in puffs. We let genfs_getpages() do most 3002 * of the dirty work, but we come in this route to do accounting tasks. 3003 * If the user server has specified functions for cache notifications 3004 * about reads and/or writes, we record which type of operation we got, 3005 * for which page range, and proceed to issue a FAF notification to the 3006 * server about it. 3007 */ 3008 int 3009 puffs_vnop_getpages(void *v) 3010 { 3011 struct vop_getpages_args /* { 3012 const struct vnodeop_desc *a_desc; 3013 struct vnode *a_vp; 3014 voff_t a_offset; 3015 struct vm_page **a_m; 3016 int *a_count; 3017 int a_centeridx; 3018 vm_prot_t a_access_type; 3019 int a_advice; 3020 int a_flags; 3021 } */ *ap = v; 3022 struct puffs_mount *pmp; 3023 struct puffs_node *pn; 3024 struct vnode *vp; 3025 struct vm_page **pgs; 3026 struct puffs_cacheinfo *pcinfo = NULL; 3027 struct puffs_cacherun *pcrun; 3028 void *parkmem = NULL; 3029 size_t runsizes; 3030 int i, npages, si, streakon; 3031 int error, locked, write; 3032 3033 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 3034 npages = *ap->a_count; 3035 pgs = ap->a_m; 3036 vp = ap->a_vp; 3037 pn = vp->v_data; 3038 locked = (ap->a_flags & PGO_LOCKED) != 0; 3039 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 3040 3041 /* ccg xnaht - gets Wuninitialized wrong */ 3042 pcrun = NULL; 3043 runsizes = 0; 3044 3045 /* 3046 * Check that we aren't trying to fault in pages which our file 3047 * server doesn't know about. This happens if we extend a file by 3048 * skipping some pages and later try to fault in pages which 3049 * are between pn_serversize and vp_size. This check optimizes 3050 * away the common case where a file is being extended. 3051 */ 3052 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 3053 struct vattr va; 3054 3055 /* try again later when we can block */ 3056 if (locked) 3057 ERROUT(EBUSY); 3058 3059 mutex_exit(vp->v_interlock); 3060 vattr_null(&va); 3061 va.va_size = vp->v_size; 3062 error = dosetattr(vp, &va, FSCRED, 0); 3063 if (error) 3064 ERROUT(error); 3065 mutex_enter(vp->v_interlock); 3066 } 3067 3068 if (write && PUFFS_WCACHEINFO(pmp)) { 3069 #ifdef notnowjohn 3070 /* allocate worst-case memory */ 3071 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 3072 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 3073 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 3074 locked ? KM_NOSLEEP : KM_SLEEP); 3075 3076 /* 3077 * can't block if we're locked and can't mess up caching 3078 * information for fs server. so come back later, please 3079 */ 3080 if (pcinfo == NULL) 3081 ERROUT(ENOMEM); 3082 3083 parkmem = puffs_park_alloc(locked == 0); 3084 if (parkmem == NULL) 3085 ERROUT(ENOMEM); 3086 3087 pcrun = pcinfo->pcache_runs; 3088 #else 3089 (void)parkmem; 3090 #endif 3091 } 3092 3093 error = genfs_getpages(v); 3094 if (error) 3095 goto out; 3096 3097 if (PUFFS_WCACHEINFO(pmp) == 0) 3098 goto out; 3099 3100 /* 3101 * Let's see whose fault it was and inform the user server of 3102 * possibly read/written pages. Map pages from read faults 3103 * strictly read-only, since otherwise we might miss info on 3104 * when the page is actually write-faulted to. 3105 */ 3106 if (!locked) 3107 mutex_enter(vp->v_uobj.vmobjlock); 3108 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 3109 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 3110 if (streakon && write) { 3111 streakon = 0; 3112 pcrun[si].pcache_runend 3113 = trunc_page(pgs[i]->offset) + PAGE_MASK; 3114 si++; 3115 } 3116 continue; 3117 } 3118 if (streakon == 0 && write) { 3119 streakon = 1; 3120 pcrun[si].pcache_runstart = pgs[i]->offset; 3121 } 3122 3123 if (!write) 3124 pgs[i]->flags |= PG_RDONLY; 3125 } 3126 /* was the last page part of our streak? */ 3127 if (streakon) { 3128 pcrun[si].pcache_runend 3129 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 3130 si++; 3131 } 3132 if (!locked) 3133 mutex_exit(vp->v_uobj.vmobjlock); 3134 3135 KASSERT(si <= (npages / 2) + 1); 3136 3137 #ifdef notnowjohn 3138 /* send results to userspace */ 3139 if (write) 3140 puffs_cacheop(pmp, parkmem, pcinfo, 3141 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 3142 #endif 3143 3144 out: 3145 if (error) { 3146 if (pcinfo != NULL) 3147 kmem_free(pcinfo, 3148 sizeof(struct puffs_cacheinfo) + runsizes); 3149 #ifdef notnowjohn 3150 if (parkmem != NULL) 3151 puffs_park_release(parkmem, 1); 3152 #endif 3153 } 3154 3155 return error; 3156 } 3157 3158 /* 3159 * Extended attribute support. 3160 */ 3161 3162 int 3163 puffs_vnop_getextattr(void *v) 3164 { 3165 struct vop_getextattr_args /* 3166 struct vnode *a_vp; 3167 int a_attrnamespace; 3168 const char *a_name; 3169 struct uio *a_uio; 3170 size_t *a_size; 3171 kauth_cred_t a_cred; 3172 }; */ *ap = v; 3173 PUFFS_MSG_VARS(vn, getextattr); 3174 struct vnode *vp = ap->a_vp; 3175 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3176 int attrnamespace = ap->a_attrnamespace; 3177 const char *name = ap->a_name; 3178 struct uio *uio = ap->a_uio; 3179 size_t *sizep = ap->a_size; 3180 size_t tomove, resid; 3181 int error; 3182 3183 if (uio) 3184 resid = uio->uio_resid; 3185 else 3186 resid = 0; 3187 3188 tomove = PUFFS_TOMOVE(resid, pmp); 3189 if (tomove != resid) { 3190 error = E2BIG; 3191 goto out; 3192 } 3193 3194 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3195 &park_getextattr, (void *)&getextattr_msg, 1); 3196 3197 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3198 strlcpy(getextattr_msg->pvnr_attrname, name, 3199 sizeof(getextattr_msg->pvnr_attrname)); 3200 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3201 if (sizep) 3202 getextattr_msg->pvnr_datasize = 1; 3203 getextattr_msg->pvnr_resid = tomove; 3204 3205 puffs_msg_setinfo(park_getextattr, 3206 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3207 puffs_msg_setdelta(park_getextattr, tomove); 3208 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3209 3210 error = checkerr(pmp, error, __func__); 3211 if (error) 3212 goto out; 3213 3214 resid = getextattr_msg->pvnr_resid; 3215 if (resid > tomove) { 3216 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3217 "resid grew", VPTOPNC(vp)); 3218 error = EPROTO; 3219 goto out; 3220 } 3221 3222 if (sizep) 3223 *sizep = getextattr_msg->pvnr_datasize; 3224 if (uio) 3225 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3226 3227 out: 3228 PUFFS_MSG_RELEASE(getextattr); 3229 return error; 3230 } 3231 3232 int 3233 puffs_vnop_setextattr(void *v) 3234 { 3235 struct vop_setextattr_args /* { 3236 struct vnode *a_vp; 3237 int a_attrnamespace; 3238 const char *a_name; 3239 struct uio *a_uio; 3240 kauth_cred_t a_cred; 3241 }; */ *ap = v; 3242 PUFFS_MSG_VARS(vn, setextattr); 3243 struct vnode *vp = ap->a_vp; 3244 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3245 int attrnamespace = ap->a_attrnamespace; 3246 const char *name = ap->a_name; 3247 struct uio *uio = ap->a_uio; 3248 size_t tomove, resid; 3249 int error; 3250 3251 if (uio) 3252 resid = uio->uio_resid; 3253 else 3254 resid = 0; 3255 3256 tomove = PUFFS_TOMOVE(resid, pmp); 3257 if (tomove != resid) { 3258 error = E2BIG; 3259 goto out; 3260 } 3261 3262 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3263 &park_setextattr, (void *)&setextattr_msg, 1); 3264 3265 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3266 strlcpy(setextattr_msg->pvnr_attrname, name, 3267 sizeof(setextattr_msg->pvnr_attrname)); 3268 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3269 setextattr_msg->pvnr_resid = tomove; 3270 3271 if (uio) { 3272 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3273 if (error) 3274 goto out; 3275 } 3276 3277 puffs_msg_setinfo(park_setextattr, 3278 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3279 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3280 3281 error = checkerr(pmp, error, __func__); 3282 if (error) 3283 goto out; 3284 3285 if (setextattr_msg->pvnr_resid != 0) 3286 error = EIO; 3287 3288 out: 3289 PUFFS_MSG_RELEASE(setextattr); 3290 3291 return error; 3292 } 3293 3294 int 3295 puffs_vnop_listextattr(void *v) 3296 { 3297 struct vop_listextattr_args /* { 3298 struct vnode *a_vp; 3299 int a_attrnamespace; 3300 struct uio *a_uio; 3301 size_t *a_size; 3302 int a_flag, 3303 kauth_cred_t a_cred; 3304 }; */ *ap = v; 3305 PUFFS_MSG_VARS(vn, listextattr); 3306 struct vnode *vp = ap->a_vp; 3307 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3308 int attrnamespace = ap->a_attrnamespace; 3309 struct uio *uio = ap->a_uio; 3310 size_t *sizep = ap->a_size; 3311 int flag = ap->a_flag; 3312 size_t tomove, resid; 3313 int error; 3314 3315 if (uio) 3316 resid = uio->uio_resid; 3317 else 3318 resid = 0; 3319 3320 tomove = PUFFS_TOMOVE(resid, pmp); 3321 if (tomove != resid) { 3322 error = E2BIG; 3323 goto out; 3324 } 3325 3326 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3327 &park_listextattr, (void *)&listextattr_msg, 1); 3328 3329 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3330 listextattr_msg->pvnr_flag = flag; 3331 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3332 listextattr_msg->pvnr_resid = tomove; 3333 if (sizep) 3334 listextattr_msg->pvnr_datasize = 1; 3335 3336 puffs_msg_setinfo(park_listextattr, 3337 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3338 puffs_msg_setdelta(park_listextattr, tomove); 3339 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3340 3341 error = checkerr(pmp, error, __func__); 3342 if (error) 3343 goto out; 3344 3345 resid = listextattr_msg->pvnr_resid; 3346 if (resid > tomove) { 3347 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3348 "resid grew", VPTOPNC(vp)); 3349 error = EPROTO; 3350 goto out; 3351 } 3352 3353 if (sizep) 3354 *sizep = listextattr_msg->pvnr_datasize; 3355 if (uio) 3356 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3357 3358 out: 3359 PUFFS_MSG_RELEASE(listextattr); 3360 return error; 3361 } 3362 3363 int 3364 puffs_vnop_deleteextattr(void *v) 3365 { 3366 struct vop_deleteextattr_args /* { 3367 struct vnode *a_vp; 3368 int a_attrnamespace; 3369 const char *a_name; 3370 kauth_cred_t a_cred; 3371 }; */ *ap = v; 3372 PUFFS_MSG_VARS(vn, deleteextattr); 3373 struct vnode *vp = ap->a_vp; 3374 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3375 int attrnamespace = ap->a_attrnamespace; 3376 const char *name = ap->a_name; 3377 int error; 3378 3379 PUFFS_MSG_ALLOC(vn, deleteextattr); 3380 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3381 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3382 sizeof(deleteextattr_msg->pvnr_attrname)); 3383 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3384 3385 puffs_msg_setinfo(park_deleteextattr, 3386 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3387 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3388 vp->v_data, NULL, error); 3389 3390 error = checkerr(pmp, error, __func__); 3391 3392 PUFFS_MSG_RELEASE(deleteextattr); 3393 return error; 3394 } 3395 3396 /* 3397 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3398 * FAF update information for the puffs node first. 3399 */ 3400 int 3401 puffs_vnop_spec_read(void *v) 3402 { 3403 struct vop_read_args /* { 3404 const struct vnodeop_desc *a_desc; 3405 struct vnode *a_vp; 3406 struct uio *a_uio; 3407 int a_ioflag; 3408 kauth_cred_t a_cred; 3409 } */ *ap = v; 3410 3411 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3412 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3413 } 3414 3415 int 3416 puffs_vnop_spec_write(void *v) 3417 { 3418 struct vop_write_args /* { 3419 const struct vnodeop_desc *a_desc; 3420 struct vnode *a_vp; 3421 struct uio *a_uio; 3422 int a_ioflag; 3423 kauth_cred_t a_cred; 3424 } */ *ap = v; 3425 3426 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3427 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3428 } 3429 3430 int 3431 puffs_vnop_fifo_read(void *v) 3432 { 3433 struct vop_read_args /* { 3434 const struct vnodeop_desc *a_desc; 3435 struct vnode *a_vp; 3436 struct uio *a_uio; 3437 int a_ioflag; 3438 kauth_cred_t a_cred; 3439 } */ *ap = v; 3440 3441 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3442 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3443 } 3444 3445 int 3446 puffs_vnop_fifo_write(void *v) 3447 { 3448 struct vop_write_args /* { 3449 const struct vnodeop_desc *a_desc; 3450 struct vnode *a_vp; 3451 struct uio *a_uio; 3452 int a_ioflag; 3453 kauth_cred_t a_cred; 3454 } */ *ap = v; 3455 3456 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3457 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3458 } 3459
Indexes created Tue Sep 30 11:09:46 GMT 2025