puffs_vnops.c revision 1.212
1 /* $NetBSD: puffs_vnops.c,v 1.212 2018/11/05 02:28:32 manu Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.212 2018/11/05 02:28:32 manu Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, hardclock_ticks */ 44 45 #include <uvm/uvm.h> 46 47 #include <fs/puffs/puffs_msgif.h> 48 #include <fs/puffs/puffs_sys.h> 49 50 #include <miscfs/fifofs/fifo.h> 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> 53 54 int puffs_vnop_lookup(void *); 55 int puffs_vnop_create(void *); 56 int puffs_vnop_access(void *); 57 int puffs_vnop_mknod(void *); 58 int puffs_vnop_open(void *); 59 int puffs_vnop_close(void *); 60 int puffs_vnop_getattr(void *); 61 int puffs_vnop_setattr(void *); 62 int puffs_vnop_reclaim(void *); 63 int puffs_vnop_readdir(void *); 64 int puffs_vnop_poll(void *); 65 int puffs_vnop_fsync(void *); 66 int puffs_vnop_seek(void *); 67 int puffs_vnop_remove(void *); 68 int puffs_vnop_mkdir(void *); 69 int puffs_vnop_rmdir(void *); 70 int puffs_vnop_link(void *); 71 int puffs_vnop_readlink(void *); 72 int puffs_vnop_symlink(void *); 73 int puffs_vnop_rename(void *); 74 int puffs_vnop_read(void *); 75 int puffs_vnop_write(void *); 76 int puffs_vnop_fallocate(void *); 77 int puffs_vnop_fdiscard(void *); 78 int puffs_vnop_fcntl(void *); 79 int puffs_vnop_ioctl(void *); 80 int puffs_vnop_inactive(void *); 81 int puffs_vnop_print(void *); 82 int puffs_vnop_pathconf(void *); 83 int puffs_vnop_advlock(void *); 84 int puffs_vnop_strategy(void *); 85 int puffs_vnop_bmap(void *); 86 int puffs_vnop_mmap(void *); 87 int puffs_vnop_getpages(void *); 88 int puffs_vnop_abortop(void *); 89 int puffs_vnop_getextattr(void *); 90 int puffs_vnop_setextattr(void *); 91 int puffs_vnop_listextattr(void *); 92 int puffs_vnop_deleteextattr(void *); 93 94 int puffs_vnop_spec_read(void *); 95 int puffs_vnop_spec_write(void *); 96 int puffs_vnop_fifo_read(void *); 97 int puffs_vnop_fifo_write(void *); 98 99 int puffs_vnop_checkop(void *); 100 101 #define puffs_vnop_lock genfs_lock 102 #define puffs_vnop_unlock genfs_unlock 103 #define puffs_vnop_islocked genfs_islocked 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 109 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 110 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 111 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 112 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 113 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 114 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 115 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 116 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 117 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 118 { &vop_fallocate_desc, puffs_vnop_fallocate }, /* fallocate */ 119 { &vop_fdiscard_desc, puffs_vnop_fdiscard }, /* fdiscard */ 120 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 121 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 122 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 123 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 124 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 125 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 126 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 127 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 128 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 129 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 130 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 131 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 132 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 133 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 134 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 135 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 136 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 137 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 138 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 139 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 140 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 141 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 142 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 143 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 144 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 145 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 146 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 147 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 148 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 149 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 150 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 151 #if 0 152 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 153 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 154 #endif 155 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 156 { NULL, NULL } 157 }; 158 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 159 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 160 161 162 int (**puffs_specop_p)(void *); 163 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 164 { &vop_default_desc, vn_default_error }, 165 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 166 { &vop_create_desc, spec_create }, /* genfs_badop */ 167 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 168 { &vop_open_desc, spec_open }, /* spec_open */ 169 { &vop_close_desc, spec_close }, /* spec_close */ 170 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 171 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 172 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 173 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 174 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 175 { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ 176 { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ 177 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 178 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 179 { &vop_poll_desc, spec_poll }, /* spec_poll */ 180 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 181 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 182 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 183 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 184 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 185 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 186 { &vop_link_desc, spec_link }, /* genfs_badop */ 187 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 188 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 189 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 190 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 191 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 192 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 193 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 194 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 195 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 196 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 197 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 198 { &vop_bmap_desc, spec_bmap }, /* dummy */ 199 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 200 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 201 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 202 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 203 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 204 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 205 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 206 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 207 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 208 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 209 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 210 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 211 #if 0 212 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 213 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 214 #endif 215 { NULL, NULL } 216 }; 217 const struct vnodeopv_desc puffs_specop_opv_desc = 218 { &puffs_specop_p, puffs_specop_entries }; 219 220 221 int (**puffs_fifoop_p)(void *); 222 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 223 { &vop_default_desc, vn_default_error }, 224 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 225 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 226 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 227 { &vop_open_desc, vn_fifo_bypass }, /* open */ 228 { &vop_close_desc, vn_fifo_bypass }, /* close */ 229 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 230 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 231 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 232 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 233 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 234 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ 235 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ 236 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 237 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 238 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 239 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 240 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 241 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 243 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 246 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 247 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 248 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 249 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 252 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 253 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 254 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 255 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 256 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 257 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 258 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 259 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 260 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 261 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 262 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 263 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 264 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 265 #if 0 266 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 267 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 268 #endif 269 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 270 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 271 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 272 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 273 { NULL, NULL } 274 }; 275 const struct vnodeopv_desc puffs_fifoop_opv_desc = 276 { &puffs_fifoop_p, puffs_fifoop_entries }; 277 278 279 /* "real" vnode operations */ 280 int (**puffs_msgop_p)(void *); 281 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 282 { &vop_default_desc, vn_default_error }, 283 { &vop_create_desc, puffs_vnop_create }, /* create */ 284 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 285 { &vop_open_desc, puffs_vnop_open }, /* open */ 286 { &vop_close_desc, puffs_vnop_close }, /* close */ 287 { &vop_access_desc, puffs_vnop_access }, /* access */ 288 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 289 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 290 { &vop_read_desc, puffs_vnop_read }, /* read */ 291 { &vop_write_desc, puffs_vnop_write }, /* write */ 292 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 293 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 294 { &vop_link_desc, puffs_vnop_link }, /* link */ 295 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 296 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 297 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 298 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 299 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 300 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 301 { &vop_print_desc, puffs_vnop_print }, /* print */ 302 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 303 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 304 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 305 { NULL, NULL } 306 }; 307 const struct vnodeopv_desc puffs_msgop_opv_desc = 308 { &puffs_msgop_p, puffs_msgop_entries }; 309 310 /* 311 * for dosetattr / update_va 312 */ 313 #define SETATTR_CHSIZE 0x01 314 #define SETATTR_ASYNC 0x02 315 316 #define ERROUT(err) \ 317 do { \ 318 error = err; \ 319 goto out; \ 320 } while (/*CONSTCOND*/0) 321 322 /* 323 * This is a generic vnode operation handler. It checks if the necessary 324 * operations for the called vnode operation are implemented by userspace 325 * and either returns a dummy return value or proceeds to call the real 326 * vnode operation from puffs_msgop_v. 327 * 328 * XXX: this should described elsewhere and autogenerated, the complexity 329 * of the vnode operations vectors and their interrelationships is also 330 * getting a bit out of hand. Another problem is that we need this same 331 * information in the fs server code, so keeping the two in sync manually 332 * is not a viable (long term) plan. 333 */ 334 335 /* not supported, handle locking protocol */ 336 #define CHECKOP_NOTSUPP(op) \ 337 case VOP_##op##_DESCOFFSET: \ 338 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 339 return genfs_eopnotsupp(v); \ 340 break 341 342 /* always succeed, no locking */ 343 #define CHECKOP_SUCCESS(op) \ 344 case VOP_##op##_DESCOFFSET: \ 345 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 346 return 0; \ 347 break 348 349 int 350 puffs_vnop_checkop(void *v) 351 { 352 struct vop_generic_args /* { 353 struct vnodeop_desc *a_desc; 354 spooky mystery contents; 355 } */ *ap = v; 356 struct vnodeop_desc *desc = ap->a_desc; 357 struct puffs_mount *pmp; 358 struct vnode *vp; 359 int offset, rv; 360 361 offset = ap->a_desc->vdesc_vp_offsets[0]; 362 #ifdef DIAGNOSTIC 363 if (offset == VDESC_NO_OFFSET) 364 panic("puffs_checkop: no vnode, why did you call me?"); 365 #endif 366 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 367 pmp = MPTOPUFFSMP(vp->v_mount); 368 369 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 370 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 371 372 if (!ALLOPS(pmp)) { 373 switch (desc->vdesc_offset) { 374 CHECKOP_NOTSUPP(CREATE); 375 CHECKOP_NOTSUPP(MKNOD); 376 CHECKOP_NOTSUPP(GETATTR); 377 CHECKOP_NOTSUPP(SETATTR); 378 CHECKOP_NOTSUPP(READ); 379 CHECKOP_NOTSUPP(WRITE); 380 CHECKOP_NOTSUPP(FCNTL); 381 CHECKOP_NOTSUPP(IOCTL); 382 CHECKOP_NOTSUPP(REMOVE); 383 CHECKOP_NOTSUPP(LINK); 384 CHECKOP_NOTSUPP(RENAME); 385 CHECKOP_NOTSUPP(MKDIR); 386 CHECKOP_NOTSUPP(RMDIR); 387 CHECKOP_NOTSUPP(SYMLINK); 388 CHECKOP_NOTSUPP(READDIR); 389 CHECKOP_NOTSUPP(READLINK); 390 CHECKOP_NOTSUPP(PRINT); 391 CHECKOP_NOTSUPP(PATHCONF); 392 CHECKOP_NOTSUPP(GETEXTATTR); 393 CHECKOP_NOTSUPP(SETEXTATTR); 394 CHECKOP_NOTSUPP(LISTEXTATTR); 395 CHECKOP_NOTSUPP(DELETEEXTATTR); 396 397 CHECKOP_SUCCESS(ACCESS); 398 CHECKOP_SUCCESS(CLOSE); 399 CHECKOP_SUCCESS(SEEK); 400 401 case VOP_GETPAGES_DESCOFFSET: 402 if (!EXISTSOP(pmp, READ)) 403 return genfs_eopnotsupp(v); 404 break; 405 406 default: 407 panic("puffs_checkop: unhandled vnop %d", 408 desc->vdesc_offset); 409 } 410 } 411 412 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 413 414 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 415 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 416 417 return rv; 418 } 419 420 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 421 struct componentname *); 422 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 423 struct componentname *); 424 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 425 static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); 426 static int flushvncache(struct vnode *, off_t, off_t, bool); 427 static void update_va(struct vnode *, struct vattr *, struct vattr *, 428 struct timespec *, struct timespec *, int); 429 static void update_parent(struct vnode *, struct vnode *); 430 431 432 #define PUFFS_ABORT_LOOKUP 1 433 #define PUFFS_ABORT_CREATE 2 434 #define PUFFS_ABORT_MKNOD 3 435 #define PUFFS_ABORT_MKDIR 4 436 #define PUFFS_ABORT_SYMLINK 5 437 438 /* 439 * Press the pani^Wabort button! Kernel resource allocation failed. 440 */ 441 static void 442 puffs_abortbutton(struct puffs_mount *pmp, int what, 443 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 444 { 445 446 switch (what) { 447 case PUFFS_ABORT_CREATE: 448 case PUFFS_ABORT_MKNOD: 449 case PUFFS_ABORT_SYMLINK: 450 callremove(pmp, dck, ck, cnp); 451 break; 452 case PUFFS_ABORT_MKDIR: 453 callrmdir(pmp, dck, ck, cnp); 454 break; 455 } 456 457 callinactive(pmp, ck, 0); 458 callreclaim(pmp, ck, 1); 459 } 460 461 /* 462 * Begin vnode operations. 463 * 464 * A word from the keymaster about locks: generally we don't want 465 * to use the vnode locks at all: it creates an ugly dependency between 466 * the userlandia file server and the kernel. But we'll play along with 467 * the kernel vnode locks for now. However, even currently we attempt 468 * to release locks as early as possible. This is possible for some 469 * operations which a) don't need a locked vnode after the userspace op 470 * and b) return with the vnode unlocked. Theoretically we could 471 * unlock-do op-lock for others and order the graph in userspace, but I 472 * don't want to think of the consequences for the time being. 473 */ 474 475 #define TTL_TO_TIMEOUT(ts) \ 476 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 477 #define TTL_VALID(ts) \ 478 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 479 #define TIMED_OUT(expire) \ 480 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 481 int 482 puffs_vnop_lookup(void *v) 483 { 484 struct vop_lookup_v2_args /* { 485 const struct vnodeop_desc *a_desc; 486 struct vnode *a_dvp; 487 struct vnode **a_vpp; 488 struct componentname *a_cnp; 489 } */ *ap = v; 490 PUFFS_MSG_VARS(vn, lookup); 491 struct puffs_mount *pmp; 492 struct componentname *cnp; 493 struct vnode *vp, *dvp, *cvp; 494 struct puffs_node *dpn, *cpn; 495 int isdot; 496 int error; 497 498 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 499 cnp = ap->a_cnp; 500 dvp = ap->a_dvp; 501 cvp = NULL; 502 cpn = NULL; 503 *ap->a_vpp = NULL; 504 505 /* r/o fs? we check create later to handle EEXIST */ 506 if ((cnp->cn_flags & ISLASTCN) 507 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 508 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 509 return EROFS; 510 511 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 512 513 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 514 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 515 516 /* 517 * If dotdot cache is enabled, add reference to .. and return. 518 */ 519 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 520 vp = VPTOPP(ap->a_dvp)->pn_parent; 521 vref(vp); 522 523 *ap->a_vpp = vp; 524 return 0; 525 } 526 527 /* 528 * Check if someone fed it into the cache 529 */ 530 if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 531 int found, iswhiteout; 532 533 found = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 534 cnp->cn_nameiop, cnp->cn_flags, 535 &iswhiteout, ap->a_vpp); 536 if (iswhiteout) { 537 cnp->cn_flags |= ISWHITEOUT; 538 } 539 540 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 541 cvp = *ap->a_vpp; 542 cpn = VPTOPP(cvp); 543 544 if (TIMED_OUT(cpn->pn_cn_timeout)) { 545 cache_purge(cvp); 546 /* 547 * cached vnode (cvp) is still referenced 548 * so that we can reuse it upon a new 549 * successful lookup. 550 */ 551 *ap->a_vpp = NULL; 552 found = 0; 553 } 554 } 555 556 /* 557 * Do not use negative caching, since the filesystem 558 * provides no TTL for it. 559 */ 560 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 561 found = 0; 562 563 if (found) { 564 return *ap->a_vpp == NULLVP ? ENOENT : 0; 565 } 566 567 /* 568 * This is what would have been left in ERROR before 569 * the rearrangement of cache_lookup(). What with all 570 * the macros, I am not sure if this is a dead value 571 * below or not. 572 */ 573 error = -1; 574 } 575 576 if (isdot) { 577 /* deal with rename lookup semantics */ 578 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 579 return EISDIR; 580 581 vp = ap->a_dvp; 582 vref(vp); 583 *ap->a_vpp = vp; 584 return 0; 585 } 586 587 if (cvp != NULL) { 588 if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { 589 vrele(cvp); 590 cvp = NULL; 591 } else 592 mutex_enter(&cpn->pn_sizemtx); 593 } 594 595 PUFFS_MSG_ALLOC(vn, lookup); 596 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 597 cnp, PUFFS_USE_FULLPNBUF(pmp)); 598 599 if (cnp->cn_flags & ISDOTDOT) 600 VOP_UNLOCK(dvp); 601 602 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 603 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 604 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 605 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 606 607 /* 608 * In case of error, there is no new vnode to play with, so be 609 * happy with the NULL value given to vpp in the beginning. 610 * Also, check if this really was an error or the target was not 611 * present. Either treat it as a non-error for CREATE/RENAME or 612 * enter the component into the negative name cache (if desired). 613 */ 614 if (error) { 615 error = checkerr(pmp, error, __func__); 616 if (error == ENOENT) { 617 /* don't allow to create files on r/o fs */ 618 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 619 && cnp->cn_nameiop == CREATE) { 620 error = EROFS; 621 622 /* adjust values if we are creating */ 623 } else if ((cnp->cn_flags & ISLASTCN) 624 && (cnp->cn_nameiop == CREATE 625 || cnp->cn_nameiop == RENAME)) { 626 error = EJUSTRETURN; 627 628 /* save negative cache entry */ 629 } else { 630 if (PUFFS_USE_NAMECACHE(pmp) && 631 !PUFFS_USE_FS_TTL(pmp)) 632 cache_enter(dvp, NULL, cnp->cn_nameptr, 633 cnp->cn_namelen, cnp->cn_flags); 634 } 635 } 636 goto out; 637 } 638 639 /* 640 * Check that we don't get our parent node back, that would cause 641 * a pretty obvious deadlock. 642 */ 643 dpn = dvp->v_data; 644 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 645 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 646 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 647 error = EPROTO; 648 goto out; 649 } 650 651 /* 652 * Check if we looked up the cached vnode 653 */ 654 vp = NULL; 655 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 656 int grace; 657 658 /* 659 * Bump grace time of this node so that it does not get 660 * reclaimed too fast. We try to increase a bit more the 661 * lifetime of busiest * nodes - with some limits. 662 */ 663 grace = 10 * puffs_sopreq_expire_timeout; 664 cpn->pn_cn_grace = hardclock_ticks + grace; 665 vp = cvp; 666 } 667 668 /* 669 * No cached vnode available, or the cached vnode does not 670 * match the userland cookie anymore: is the node known? 671 */ 672 if (vp == NULL) { 673 error = puffs_getvnode(dvp->v_mount, 674 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 675 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 676 if (error) { 677 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 678 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 679 ap->a_cnp); 680 goto out; 681 } 682 683 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 684 } 685 686 /* 687 * Update cache and TTL 688 */ 689 if (PUFFS_USE_FS_TTL(pmp)) { 690 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 691 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 692 update_va(vp, NULL, &lookup_msg->pvnr_va, 693 va_ttl, cn_ttl, SETATTR_CHSIZE); 694 } 695 696 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 697 *ap->a_vpp = vp; 698 699 if (PUFFS_USE_NAMECACHE(pmp)) 700 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 701 cnp->cn_flags); 702 703 /* XXX */ 704 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 705 cnp->cn_flags &= ~REQUIREDIR; 706 if (lookup_msg->pvnr_cn.pkcn_consume) 707 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 708 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 709 710 VPTOPP(vp)->pn_nlookup++; 711 712 if (PUFFS_USE_DOTDOTCACHE(pmp) && 713 (VPTOPP(vp)->pn_parent != dvp)) 714 update_parent(vp, dvp); 715 716 out: 717 if (cvp != NULL) { 718 mutex_exit(&cpn->pn_sizemtx); 719 720 if (error || (cvp != vp)) 721 vput(cvp); 722 } 723 if (error == 0) 724 VOP_UNLOCK(*ap->a_vpp); 725 726 if (cnp->cn_flags & ISDOTDOT) 727 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 728 729 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 730 PUFFS_MSG_RELEASE(lookup); 731 return error; 732 } 733 734 #define REFPN_AND_UNLOCKVP(a, b) \ 735 do { \ 736 mutex_enter(&b->pn_mtx); \ 737 puffs_referencenode(b); \ 738 mutex_exit(&b->pn_mtx); \ 739 VOP_UNLOCK(a); \ 740 } while (/*CONSTCOND*/0) 741 742 #define REFPN(b) \ 743 do { \ 744 mutex_enter(&b->pn_mtx); \ 745 puffs_referencenode(b); \ 746 mutex_exit(&b->pn_mtx); \ 747 } while (/*CONSTCOND*/0) 748 749 #define RELEPN_AND_VP(a, b) \ 750 do { \ 751 puffs_releasenode(b); \ 752 vrele(a); \ 753 } while (/*CONSTCOND*/0) 754 755 int 756 puffs_vnop_create(void *v) 757 { 758 struct vop_create_v3_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_dvp; 761 struct vnode **a_vpp; 762 struct componentname *a_cnp; 763 struct vattr *a_vap; 764 } */ *ap = v; 765 PUFFS_MSG_VARS(vn, create); 766 struct vnode *dvp = ap->a_dvp; 767 struct puffs_node *dpn = VPTOPP(dvp); 768 struct componentname *cnp = ap->a_cnp; 769 struct mount *mp = dvp->v_mount; 770 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 771 int error; 772 773 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 774 dvp, ap->a_cnp->cn_nameptr)); 775 776 PUFFS_MSG_ALLOC(vn, create); 777 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 778 cnp, PUFFS_USE_FULLPNBUF(pmp)); 779 create_msg->pvnr_va = *ap->a_vap; 780 puffs_msg_setinfo(park_create, PUFFSOP_VN, 781 PUFFS_VN_CREATE, VPTOPNC(dvp)); 782 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 783 784 error = checkerr(pmp, error, __func__); 785 if (error) 786 goto out; 787 788 error = puffs_newnode(mp, dvp, ap->a_vpp, 789 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 790 if (error) { 791 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 792 create_msg->pvnr_newnode, cnp); 793 goto out; 794 } 795 796 if (PUFFS_USE_FS_TTL(pmp)) { 797 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 798 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 799 struct vattr *rvap = &create_msg->pvnr_va; 800 801 update_va(*ap->a_vpp, NULL, rvap, 802 va_ttl, cn_ttl, SETATTR_CHSIZE); 803 } 804 805 VPTOPP(*ap->a_vpp)->pn_nlookup++; 806 807 if (PUFFS_USE_DOTDOTCACHE(pmp) && 808 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 809 update_parent(*ap->a_vpp, dvp); 810 811 out: 812 DPRINTF(("puffs_create: return %d\n", error)); 813 PUFFS_MSG_RELEASE(create); 814 return error; 815 } 816 817 int 818 puffs_vnop_mknod(void *v) 819 { 820 struct vop_mknod_v3_args /* { 821 const struct vnodeop_desc *a_desc; 822 struct vnode *a_dvp; 823 struct vnode **a_vpp; 824 struct componentname *a_cnp; 825 struct vattr *a_vap; 826 } */ *ap = v; 827 PUFFS_MSG_VARS(vn, mknod); 828 struct vnode *dvp = ap->a_dvp; 829 struct puffs_node *dpn = VPTOPP(dvp); 830 struct componentname *cnp = ap->a_cnp; 831 struct mount *mp = dvp->v_mount; 832 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 833 int error; 834 835 PUFFS_MSG_ALLOC(vn, mknod); 836 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 837 cnp, PUFFS_USE_FULLPNBUF(pmp)); 838 mknod_msg->pvnr_va = *ap->a_vap; 839 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 840 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 841 842 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 843 844 error = checkerr(pmp, error, __func__); 845 if (error) 846 goto out; 847 848 error = puffs_newnode(mp, dvp, ap->a_vpp, 849 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 850 ap->a_vap->va_rdev); 851 if (error) { 852 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 853 mknod_msg->pvnr_newnode, cnp); 854 goto out; 855 } 856 857 if (PUFFS_USE_FS_TTL(pmp)) { 858 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 859 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 860 struct vattr *rvap = &mknod_msg->pvnr_va; 861 862 update_va(*ap->a_vpp, NULL, rvap, 863 va_ttl, cn_ttl, SETATTR_CHSIZE); 864 } 865 866 VPTOPP(*ap->a_vpp)->pn_nlookup++; 867 868 if (PUFFS_USE_DOTDOTCACHE(pmp) && 869 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 870 update_parent(*ap->a_vpp, dvp); 871 872 out: 873 PUFFS_MSG_RELEASE(mknod); 874 return error; 875 } 876 877 int 878 puffs_vnop_open(void *v) 879 { 880 struct vop_open_args /* { 881 const struct vnodeop_desc *a_desc; 882 struct vnode *a_vp; 883 int a_mode; 884 kauth_cred_t a_cred; 885 } */ *ap = v; 886 PUFFS_MSG_VARS(vn, open); 887 struct vnode *vp = ap->a_vp; 888 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 889 struct puffs_node *pn = VPTOPP(vp); 890 int mode = ap->a_mode; 891 int error; 892 893 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 894 895 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 896 ERROUT(EROFS); 897 898 if (!EXISTSOP(pmp, OPEN)) 899 ERROUT(0); 900 901 PUFFS_MSG_ALLOC(vn, open); 902 open_msg->pvnr_mode = mode; 903 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 904 puffs_msg_setinfo(park_open, PUFFSOP_VN, 905 PUFFS_VN_OPEN, VPTOPNC(vp)); 906 907 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 908 error = checkerr(pmp, error, __func__); 909 910 if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { 911 /* 912 * Flush cache: 913 * - we do not want to discard cached write by direct write 914 * - read cache is now useless and should be freed 915 */ 916 mutex_enter(&pn->pn_sizemtx); 917 flushvncache(vp, 0, 0, true); 918 mutex_exit(&pn->pn_sizemtx); 919 920 if (mode & FREAD) 921 pn->pn_stat |= PNODE_RDIRECT; 922 if (mode & FWRITE) 923 pn->pn_stat |= PNODE_WDIRECT; 924 } 925 out: 926 DPRINTF(("puffs_open: returning %d\n", error)); 927 PUFFS_MSG_RELEASE(open); 928 return error; 929 } 930 931 int 932 puffs_vnop_close(void *v) 933 { 934 struct vop_close_args /* { 935 const struct vnodeop_desc *a_desc; 936 struct vnode *a_vp; 937 int a_fflag; 938 kauth_cred_t a_cred; 939 } */ *ap = v; 940 PUFFS_MSG_VARS(vn, close); 941 struct vnode *vp = ap->a_vp; 942 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 943 944 PUFFS_MSG_ALLOC(vn, close); 945 puffs_msg_setfaf(park_close); 946 close_msg->pvnr_fflag = ap->a_fflag; 947 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 948 puffs_msg_setinfo(park_close, PUFFSOP_VN, 949 PUFFS_VN_CLOSE, VPTOPNC(vp)); 950 951 puffs_msg_enqueue(pmp, park_close); 952 PUFFS_MSG_RELEASE(close); 953 return 0; 954 } 955 956 int 957 puffs_vnop_access(void *v) 958 { 959 struct vop_access_args /* { 960 const struct vnodeop_desc *a_desc; 961 struct vnode *a_vp; 962 int a_mode; 963 kauth_cred_t a_cred; 964 } */ *ap = v; 965 PUFFS_MSG_VARS(vn, access); 966 struct vnode *vp = ap->a_vp; 967 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 968 int mode = ap->a_mode; 969 int error; 970 971 if (mode & VWRITE) { 972 switch (vp->v_type) { 973 case VDIR: 974 case VLNK: 975 case VREG: 976 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 977 || !EXISTSOP(pmp, WRITE)) 978 return EROFS; 979 break; 980 default: 981 break; 982 } 983 } 984 985 if (!EXISTSOP(pmp, ACCESS)) 986 return 0; 987 988 PUFFS_MSG_ALLOC(vn, access); 989 access_msg->pvnr_mode = ap->a_mode; 990 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 991 puffs_msg_setinfo(park_access, PUFFSOP_VN, 992 PUFFS_VN_ACCESS, VPTOPNC(vp)); 993 994 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 995 error = checkerr(pmp, error, __func__); 996 PUFFS_MSG_RELEASE(access); 997 998 return error; 999 } 1000 1001 static void 1002 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 1003 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 1004 { 1005 struct puffs_node *pn = VPTOPP(vp); 1006 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1007 int use_metacache; 1008 1009 if (TTL_VALID(cn_ttl)) { 1010 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1011 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1012 } 1013 1014 /* 1015 * Don't listen to the file server regarding special device 1016 * size info, the file server doesn't know anything about them. 1017 */ 1018 if (vp->v_type == VBLK || vp->v_type == VCHR) 1019 rvap->va_size = vp->v_size; 1020 1021 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1022 if (vp->v_type == VBLK) 1023 rvap->va_blocksize = BLKDEV_IOSIZE; 1024 else if (vp->v_type == VCHR) 1025 rvap->va_blocksize = MAXBSIZE; 1026 1027 if (vap != NULL) { 1028 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1029 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1030 1031 if (PUFFS_USE_METAFLUSH(pmp)) { 1032 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1033 vap->va_atime = pn->pn_mc_atime; 1034 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1035 vap->va_ctime = pn->pn_mc_ctime; 1036 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1037 vap->va_mtime = pn->pn_mc_mtime; 1038 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1039 vap->va_size = pn->pn_mc_size; 1040 } 1041 } 1042 1043 use_metacache = PUFFS_USE_METAFLUSH(pmp) && 1044 (pn->pn_stat & PNODE_METACACHE_SIZE); 1045 if (!use_metacache && (flags & SETATTR_CHSIZE)) { 1046 if (rvap->va_size != VNOVAL 1047 && vp->v_type != VBLK && vp->v_type != VCHR) { 1048 uvm_vnp_setsize(vp, rvap->va_size); 1049 pn->pn_serversize = rvap->va_size; 1050 } 1051 } 1052 1053 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1054 if (pn->pn_va_cache == NULL) 1055 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1056 1057 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1058 1059 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1060 } 1061 } 1062 1063 static void 1064 update_parent(struct vnode *vp, struct vnode *dvp) 1065 { 1066 struct puffs_node *pn = VPTOPP(vp); 1067 1068 if (pn->pn_parent != NULL) { 1069 KASSERT(pn->pn_parent != dvp); 1070 vrele(pn->pn_parent); 1071 } 1072 1073 vref(dvp); 1074 pn->pn_parent = dvp; 1075 } 1076 1077 int 1078 puffs_vnop_getattr(void *v) 1079 { 1080 struct vop_getattr_args /* { 1081 const struct vnodeop_desc *a_desc; 1082 struct vnode *a_vp; 1083 struct vattr *a_vap; 1084 kauth_cred_t a_cred; 1085 } */ *ap = v; 1086 PUFFS_MSG_VARS(vn, getattr); 1087 struct vnode *vp = ap->a_vp; 1088 struct mount *mp = vp->v_mount; 1089 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1090 struct vattr *vap, *rvap; 1091 struct puffs_node *pn = VPTOPP(vp); 1092 struct timespec *va_ttl = NULL; 1093 int error = 0; 1094 1095 /* 1096 * A lock is required so that we do not race with 1097 * setattr, write and fsync when changing vp->v_size. 1098 * This is critical, since setting a stall smaler value 1099 * triggers a file truncate in uvm_vnp_setsize(), which 1100 * most of the time means data corruption (a chunk of 1101 * data is replaced by zeroes). This can be removed if 1102 * we decide one day that VOP_GETATTR must operate on 1103 * a locked vnode. 1104 * 1105 * XXX Should be useless now that VOP_GETATTR has been 1106 * fixed to always require a shared lock at least. 1107 */ 1108 mutex_enter(&pn->pn_sizemtx); 1109 1110 REFPN(pn); 1111 vap = ap->a_vap; 1112 1113 if (PUFFS_USE_FS_TTL(pmp)) { 1114 if (!TIMED_OUT(pn->pn_va_timeout)) { 1115 update_va(vp, vap, pn->pn_va_cache, 1116 NULL, NULL, SETATTR_CHSIZE); 1117 goto out2; 1118 } 1119 } 1120 1121 PUFFS_MSG_ALLOC(vn, getattr); 1122 vattr_null(&getattr_msg->pvnr_va); 1123 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1124 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1125 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1126 1127 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1128 error = checkerr(pmp, error, __func__); 1129 if (error) 1130 goto out; 1131 1132 rvap = &getattr_msg->pvnr_va; 1133 1134 if (PUFFS_USE_FS_TTL(pmp)) 1135 va_ttl = &getattr_msg->pvnr_va_ttl; 1136 1137 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1138 1139 out: 1140 PUFFS_MSG_RELEASE(getattr); 1141 1142 out2: 1143 puffs_releasenode(pn); 1144 1145 mutex_exit(&pn->pn_sizemtx); 1146 1147 return error; 1148 } 1149 1150 static void 1151 zerofill_lastpage(struct vnode *vp, voff_t off) 1152 { 1153 1154 if (trunc_page(off) == off) 1155 return; 1156 1157 if (vp->v_writecount == 0) 1158 return; 1159 1160 vsize_t len = round_page(off) - off; 1161 ubc_zerorange(&vp->v_uobj, off, len, UBC_WRITE|UBC_UNMAP_FLAG(vp)); 1162 } 1163 1164 static int 1165 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1166 { 1167 PUFFS_MSG_VARS(vn, setattr); 1168 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1169 struct puffs_node *pn = vp->v_data; 1170 vsize_t oldsize = vp->v_size; 1171 int error = 0; 1172 1173 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1174 1175 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1176 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1177 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1178 || vap->va_mode != (mode_t)VNOVAL)) 1179 return EROFS; 1180 1181 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1182 && vp->v_type == VREG && vap->va_size != VNOVAL) 1183 return EROFS; 1184 1185 /* 1186 * Flush metacache first. If we are called with some explicit 1187 * parameters, treat them as information overriding metacache 1188 * information. 1189 */ 1190 if (PUFFS_USE_METAFLUSH(pmp) && pn->pn_stat & PNODE_METACACHE_MASK) { 1191 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1192 && vap->va_atime.tv_sec == VNOVAL) 1193 vap->va_atime = pn->pn_mc_atime; 1194 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1195 && vap->va_ctime.tv_sec == VNOVAL) 1196 vap->va_ctime = pn->pn_mc_ctime; 1197 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1198 && vap->va_mtime.tv_sec == VNOVAL) 1199 vap->va_mtime = pn->pn_mc_mtime; 1200 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1201 && vap->va_size == VNOVAL) 1202 vap->va_size = pn->pn_mc_size; 1203 1204 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1205 } 1206 1207 /* 1208 * Flush attribute cache so that another thread do 1209 * not get a stale value during the operation. 1210 */ 1211 if (PUFFS_USE_FS_TTL(pmp)) 1212 pn->pn_va_timeout = 0; 1213 1214 PUFFS_MSG_ALLOC(vn, setattr); 1215 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1216 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1217 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1218 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1219 if (flags & SETATTR_ASYNC) 1220 puffs_msg_setfaf(park_setattr); 1221 1222 puffs_msg_enqueue(pmp, park_setattr); 1223 if ((flags & SETATTR_ASYNC) == 0) { 1224 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1225 1226 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1227 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1228 struct vattr *rvap = &setattr_msg->pvnr_va; 1229 1230 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1231 } 1232 } 1233 1234 PUFFS_MSG_RELEASE(setattr); 1235 if ((flags & SETATTR_ASYNC) == 0) { 1236 error = checkerr(pmp, error, __func__); 1237 if (error) 1238 return error; 1239 } else { 1240 error = 0; 1241 } 1242 1243 if (vap->va_size != VNOVAL) { 1244 /* 1245 * If we truncated the file, make sure the data beyond 1246 * EOF in last page does not remain in cache, otherwise 1247 * if the file is later truncated to a larger size (creating 1248 * a hole), that area will not return zeroes as it 1249 * should. 1250 */ 1251 if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && 1252 (vap->va_size < oldsize)) 1253 zerofill_lastpage(vp, vap->va_size); 1254 1255 pn->pn_serversize = vap->va_size; 1256 if (flags & SETATTR_CHSIZE) 1257 uvm_vnp_setsize(vp, vap->va_size); 1258 puffs_updatenode(pn, PUFFS_UPDATECTIME | PUFFS_UPDATEMTIME, 0); 1259 } 1260 1261 return 0; 1262 } 1263 1264 int 1265 puffs_vnop_setattr(void *v) 1266 { 1267 struct vop_getattr_args /* { 1268 const struct vnodeop_desc *a_desc; 1269 struct vnode *a_vp; 1270 struct vattr *a_vap; 1271 kauth_cred_t a_cred; 1272 } */ *ap = v; 1273 struct puffs_node *pn = ap->a_vp->v_data; 1274 int error; 1275 1276 mutex_enter(&pn->pn_sizemtx); 1277 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1278 mutex_exit(&pn->pn_sizemtx); 1279 1280 return error; 1281 } 1282 1283 static __inline int 1284 doinact(struct puffs_mount *pmp, int iaflag) 1285 { 1286 1287 if (EXISTSOP(pmp, INACTIVE)) 1288 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1289 if (iaflag || ALLOPS(pmp)) 1290 return 1; 1291 else 1292 return 0; 1293 else 1294 return 1; 1295 else 1296 return 0; 1297 } 1298 1299 static void 1300 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1301 { 1302 PUFFS_MSG_VARS(vn, inactive); 1303 1304 if (doinact(pmp, iaflag)) { 1305 PUFFS_MSG_ALLOC(vn, inactive); 1306 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1307 PUFFS_VN_INACTIVE, ck); 1308 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1309 PUFFS_MSG_RELEASE(inactive); 1310 } 1311 } 1312 1313 /* XXX: callinactive can't setback */ 1314 int 1315 puffs_vnop_inactive(void *v) 1316 { 1317 struct vop_inactive_v2_args /* { 1318 const struct vnodeop_desc *a_desc; 1319 struct vnode *a_vp; 1320 } */ *ap = v; 1321 PUFFS_MSG_VARS(vn, inactive); 1322 struct vnode *vp = ap->a_vp; 1323 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1324 struct puffs_node *pnode; 1325 bool recycle = false; 1326 1327 /* 1328 * When puffs_cookie2vnode() misses an entry, vcache_get() 1329 * creates a new node (puffs_vfsop_loadvnode being called to 1330 * initialize the PUFFS part), then it discovers it is VNON, 1331 * and tries to vrele() it. This leads us there, while the 1332 * cookie was stall and the node likely already reclaimed. 1333 */ 1334 if (vp->v_type == VNON) { 1335 return 0; 1336 } 1337 1338 pnode = vp->v_data; 1339 mutex_enter(&pnode->pn_sizemtx); 1340 1341 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1342 flushvncache(vp, 0, 0, false); 1343 PUFFS_MSG_ALLOC(vn, inactive); 1344 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1345 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1346 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1347 NULL); 1348 PUFFS_MSG_RELEASE(inactive); 1349 } 1350 pnode->pn_stat &= ~PNODE_DOINACT; 1351 1352 /* 1353 * file server thinks it's gone? then don't be afraid care, 1354 * node's life was already all it would ever be 1355 */ 1356 if (pnode->pn_stat & PNODE_NOREFS) { 1357 pnode->pn_stat |= PNODE_DYING; 1358 recycle = true; 1359 } 1360 1361 /* 1362 * Handle node TTL. 1363 * If grace has already timed out, make it reclaimed. 1364 * Otherwise, we queue its expiration by sop thread, so 1365 * that it does not remain for ages in the freelist, 1366 * holding memory in userspace, while we will have 1367 * to look it up again anyway. 1368 */ 1369 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1370 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1371 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1372 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1373 1374 if (!incache && !ingrace && !reclaimqueued) { 1375 pnode->pn_stat |= PNODE_DYING; 1376 recycle = true; 1377 } 1378 1379 if (!recycle && !reclaimqueued) { 1380 struct puffs_sopreq *psopr; 1381 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1382 1383 KASSERT(curlwp != uvm.pagedaemon_lwp); 1384 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1385 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1386 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1387 psopr->psopr_at = at; 1388 1389 mutex_enter(&pmp->pmp_sopmtx); 1390 1391 /* 1392 * If thread has disapeared, just give up. The 1393 * fs is being unmounted and the node will be 1394 * be reclaimed anyway. 1395 * 1396 * Otherwise, we queue the request but do not 1397 * immediatly signal the thread, as the node 1398 * has not been expired yet. 1399 */ 1400 if (pmp->pmp_sopthrcount == 0) { 1401 kmem_free(psopr, sizeof(*psopr)); 1402 } else { 1403 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1404 psopr, psopr_entries); 1405 pnode->pn_stat |= PNODE_SOPEXP; 1406 } 1407 1408 mutex_exit(&pmp->pmp_sopmtx); 1409 } 1410 } 1411 1412 /* 1413 * Wipe direct I/O flags 1414 */ 1415 pnode->pn_stat &= ~(PNODE_RDIRECT|PNODE_WDIRECT); 1416 1417 *ap->a_recycle = recycle; 1418 1419 mutex_exit(&pnode->pn_sizemtx); 1420 1421 return 0; 1422 } 1423 1424 static void 1425 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1426 { 1427 PUFFS_MSG_VARS(vn, reclaim); 1428 1429 if (!EXISTSOP(pmp, RECLAIM)) 1430 return; 1431 1432 PUFFS_MSG_ALLOC(vn, reclaim); 1433 reclaim_msg->pvnr_nlookup = nlookup; 1434 puffs_msg_setfaf(park_reclaim); 1435 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1436 1437 puffs_msg_enqueue(pmp, park_reclaim); 1438 PUFFS_MSG_RELEASE(reclaim); 1439 return; 1440 } 1441 1442 /* 1443 * always FAF, we don't really care if the server wants to fail to 1444 * reclaim the node or not 1445 */ 1446 int 1447 puffs_vnop_reclaim(void *v) 1448 { 1449 struct vop_reclaim_v2_args /* { 1450 const struct vnodeop_desc *a_desc; 1451 struct vnode *a_vp; 1452 } */ *ap = v; 1453 struct vnode *vp = ap->a_vp; 1454 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1455 bool notifyserver = true; 1456 1457 VOP_UNLOCK(vp); 1458 1459 /* 1460 * first things first: check if someone is trying to reclaim the 1461 * root vnode. do not allow that to travel to userspace. 1462 * Note that we don't need to take the lock similarly to 1463 * puffs_root(), since there is only one of us. 1464 */ 1465 if (vp->v_vflag & VV_ROOT) { 1466 mutex_enter(&pmp->pmp_lock); 1467 KASSERT(pmp->pmp_root != NULL); 1468 pmp->pmp_root = NULL; 1469 mutex_exit(&pmp->pmp_lock); 1470 notifyserver = false; 1471 } 1472 1473 /* 1474 * purge info from kernel before issueing FAF, since we 1475 * don't really know when we'll get around to it after 1476 * that and someone might race us into node creation 1477 */ 1478 mutex_enter(&pmp->pmp_lock); 1479 if (PUFFS_USE_NAMECACHE(pmp)) 1480 cache_purge(vp); 1481 mutex_exit(&pmp->pmp_lock); 1482 1483 if (notifyserver) { 1484 int nlookup = VPTOPP(vp)->pn_nlookup; 1485 1486 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1487 } 1488 1489 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1490 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1491 vrele(VPTOPP(vp)->pn_parent); 1492 else 1493 KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); 1494 } 1495 1496 puffs_putvnode(vp); 1497 1498 return 0; 1499 } 1500 1501 #define CSIZE sizeof(**ap->a_cookies) 1502 int 1503 puffs_vnop_readdir(void *v) 1504 { 1505 struct vop_readdir_args /* { 1506 const struct vnodeop_desc *a_desc; 1507 struct vnode *a_vp; 1508 struct uio *a_uio; 1509 kauth_cred_t a_cred; 1510 int *a_eofflag; 1511 off_t **a_cookies; 1512 int *a_ncookies; 1513 } */ *ap = v; 1514 PUFFS_MSG_VARS(vn, readdir); 1515 struct vnode *vp = ap->a_vp; 1516 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1517 size_t argsize, tomove, cookiemem, cookiesmax; 1518 struct uio *uio = ap->a_uio; 1519 size_t howmuch, resid; 1520 int error; 1521 1522 /* 1523 * ok, so we need: resid + cookiemem = maxreq 1524 * => resid + cookiesize * (resid/minsize) = maxreq 1525 * => resid + cookiesize/minsize * resid = maxreq 1526 * => (cookiesize/minsize + 1) * resid = maxreq 1527 * => resid = maxreq / (cookiesize/minsize + 1) 1528 * 1529 * Since cookiesize <= minsize and we're not very big on floats, 1530 * we approximate that to be 1. Therefore: 1531 * 1532 * resid = maxreq / 2; 1533 * 1534 * Well, at least we didn't have to use differential equations 1535 * or the Gram-Schmidt process. 1536 * 1537 * (yes, I'm very afraid of this) 1538 */ 1539 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1540 1541 if (ap->a_cookies) { 1542 KASSERT(ap->a_ncookies != NULL); 1543 if (pmp->pmp_args.pa_fhsize == 0) 1544 return EOPNOTSUPP; 1545 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1546 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1547 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1548 } else { 1549 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1550 cookiesmax = 0; 1551 cookiemem = 0; 1552 } 1553 1554 argsize = sizeof(struct puffs_vnmsg_readdir); 1555 tomove = resid + cookiemem; 1556 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1557 (void *)&readdir_msg, 1); 1558 1559 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1560 readdir_msg->pvnr_offset = uio->uio_offset; 1561 readdir_msg->pvnr_resid = resid; 1562 readdir_msg->pvnr_ncookies = cookiesmax; 1563 readdir_msg->pvnr_eofflag = 0; 1564 readdir_msg->pvnr_dentoff = cookiemem; 1565 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1566 PUFFS_VN_READDIR, VPTOPNC(vp)); 1567 puffs_msg_setdelta(park_readdir, tomove); 1568 1569 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1570 error = checkerr(pmp, error, __func__); 1571 if (error) 1572 goto out; 1573 1574 /* userspace is cheating? */ 1575 if (readdir_msg->pvnr_resid > resid) { 1576 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1577 "resid grew", VPTOPNC(vp)); 1578 ERROUT(EPROTO); 1579 } 1580 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1581 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1582 "too many cookies", VPTOPNC(vp)); 1583 ERROUT(EPROTO); 1584 } 1585 1586 /* check eof */ 1587 if (readdir_msg->pvnr_eofflag) 1588 *ap->a_eofflag = 1; 1589 1590 /* bouncy-wouncy with the directory data */ 1591 howmuch = resid - readdir_msg->pvnr_resid; 1592 1593 /* force eof if no data was returned (getcwd() needs this) */ 1594 if (howmuch == 0) { 1595 *ap->a_eofflag = 1; 1596 goto out; 1597 } 1598 1599 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1600 if (error) 1601 goto out; 1602 1603 /* provide cookies to caller if so desired */ 1604 if (ap->a_cookies) { 1605 KASSERT(curlwp != uvm.pagedaemon_lwp); 1606 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1607 M_TEMP, M_WAITOK); 1608 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1609 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1610 *ap->a_ncookies*CSIZE); 1611 } 1612 1613 /* next readdir starts here */ 1614 uio->uio_offset = readdir_msg->pvnr_offset; 1615 1616 out: 1617 puffs_msgmem_release(park_readdir); 1618 return error; 1619 } 1620 #undef CSIZE 1621 1622 /* 1623 * poll works by consuming the bitmask in pn_revents. If there are 1624 * events available, poll returns immediately. If not, it issues a 1625 * poll to userspace, selrecords itself and returns with no available 1626 * events. When the file server returns, it executes puffs_parkdone_poll(), 1627 * where available events are added to the bitmask. selnotify() is 1628 * then also executed by that function causing us to enter here again 1629 * and hopefully find the missing bits (unless someone got them first, 1630 * in which case it starts all over again). 1631 */ 1632 int 1633 puffs_vnop_poll(void *v) 1634 { 1635 struct vop_poll_args /* { 1636 const struct vnodeop_desc *a_desc; 1637 struct vnode *a_vp; 1638 int a_events; 1639 } */ *ap = v; 1640 PUFFS_MSG_VARS(vn, poll); 1641 struct vnode *vp = ap->a_vp; 1642 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1643 struct puffs_node *pn = vp->v_data; 1644 int events; 1645 1646 if (EXISTSOP(pmp, POLL)) { 1647 mutex_enter(&pn->pn_mtx); 1648 events = pn->pn_revents & ap->a_events; 1649 if (events & ap->a_events) { 1650 pn->pn_revents &= ~ap->a_events; 1651 mutex_exit(&pn->pn_mtx); 1652 1653 return events; 1654 } else { 1655 puffs_referencenode(pn); 1656 mutex_exit(&pn->pn_mtx); 1657 1658 PUFFS_MSG_ALLOC(vn, poll); 1659 poll_msg->pvnr_events = ap->a_events; 1660 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1661 PUFFS_VN_POLL, VPTOPNC(vp)); 1662 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1663 selrecord(curlwp, &pn->pn_sel); 1664 1665 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1666 vp->v_data, NULL); 1667 PUFFS_MSG_RELEASE(poll); 1668 1669 return 0; 1670 } 1671 } else { 1672 return genfs_poll(v); 1673 } 1674 } 1675 1676 static int 1677 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1678 { 1679 struct puffs_node *pn = VPTOPP(vp); 1680 struct vattr va; 1681 int pflags, error; 1682 1683 /* flush out information from our metacache, see vop_setattr */ 1684 if (pn->pn_stat & PNODE_METACACHE_MASK 1685 && (pn->pn_stat & PNODE_DYING) == 0) { 1686 vattr_null(&va); 1687 error = dosetattr(vp, &va, FSCRED, 1688 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1689 if (error) 1690 return error; 1691 } 1692 1693 /* 1694 * flush pages to avoid being overly dirty 1695 */ 1696 pflags = PGO_CLEANIT; 1697 if (wait) 1698 pflags |= PGO_SYNCIO; 1699 1700 mutex_enter(vp->v_interlock); 1701 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1702 } 1703 1704 int 1705 puffs_vnop_fsync(void *v) 1706 { 1707 struct vop_fsync_args /* { 1708 const struct vnodeop_desc *a_desc; 1709 struct vnode *a_vp; 1710 kauth_cred_t a_cred; 1711 int a_flags; 1712 off_t a_offlo; 1713 off_t a_offhi; 1714 } */ *ap = v; 1715 PUFFS_MSG_VARS(vn, fsync); 1716 struct vnode *vp; 1717 struct puffs_node *pn; 1718 struct puffs_mount *pmp; 1719 int error, dofaf; 1720 1721 vp = ap->a_vp; 1722 KASSERT(vp != NULL); 1723 pn = VPTOPP(vp); 1724 KASSERT(pn != NULL); 1725 pmp = MPTOPUFFSMP(vp->v_mount); 1726 if (ap->a_flags & FSYNC_WAIT) { 1727 mutex_enter(&pn->pn_sizemtx); 1728 } else { 1729 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1730 return EDEADLK; 1731 } 1732 1733 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1734 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1735 if (error) 1736 goto out; 1737 1738 /* 1739 * HELLO! We exit already here if the user server does not 1740 * support fsync OR if we should call fsync for a node which 1741 * has references neither in the kernel or the fs server. 1742 * Otherwise we continue to issue fsync() forward. 1743 */ 1744 error = 0; 1745 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1746 goto out; 1747 1748 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1749 /* 1750 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1751 * only FAFs for those. Otherwise there's a danger of deadlock, 1752 * since the execution context here might be the user server 1753 * doing some operation on another fs, which in turn caused a 1754 * vnode to be reclaimed from the freelist for this fs. 1755 */ 1756 if (dofaf == 0) { 1757 mutex_enter(vp->v_interlock); 1758 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1759 dofaf = 1; 1760 mutex_exit(vp->v_interlock); 1761 } 1762 1763 PUFFS_MSG_ALLOC(vn, fsync); 1764 if (dofaf) 1765 puffs_msg_setfaf(park_fsync); 1766 1767 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1768 fsync_msg->pvnr_flags = ap->a_flags; 1769 fsync_msg->pvnr_offlo = ap->a_offlo; 1770 fsync_msg->pvnr_offhi = ap->a_offhi; 1771 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1772 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1773 1774 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1775 PUFFS_MSG_RELEASE(fsync); 1776 1777 error = checkerr(pmp, error, __func__); 1778 1779 out: 1780 mutex_exit(&pn->pn_sizemtx); 1781 return error; 1782 } 1783 1784 int 1785 puffs_vnop_seek(void *v) 1786 { 1787 struct vop_seek_args /* { 1788 const struct vnodeop_desc *a_desc; 1789 struct vnode *a_vp; 1790 off_t a_oldoff; 1791 off_t a_newoff; 1792 kauth_cred_t a_cred; 1793 } */ *ap = v; 1794 PUFFS_MSG_VARS(vn, seek); 1795 struct vnode *vp = ap->a_vp; 1796 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1797 int error; 1798 1799 PUFFS_MSG_ALLOC(vn, seek); 1800 seek_msg->pvnr_oldoff = ap->a_oldoff; 1801 seek_msg->pvnr_newoff = ap->a_newoff; 1802 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1803 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1804 PUFFS_VN_SEEK, VPTOPNC(vp)); 1805 1806 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1807 PUFFS_MSG_RELEASE(seek); 1808 return checkerr(pmp, error, __func__); 1809 } 1810 1811 static int 1812 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1813 struct componentname *cnp) 1814 { 1815 PUFFS_MSG_VARS(vn, remove); 1816 int error; 1817 1818 PUFFS_MSG_ALLOC(vn, remove); 1819 remove_msg->pvnr_cookie_targ = ck; 1820 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1821 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1822 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1823 1824 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1825 PUFFS_MSG_RELEASE(remove); 1826 1827 return checkerr(pmp, error, __func__); 1828 } 1829 1830 /* 1831 * XXX: can't use callremove now because can't catch setbacks with 1832 * it due to lack of a pnode argument. 1833 */ 1834 int 1835 puffs_vnop_remove(void *v) 1836 { 1837 struct vop_remove_v2_args /* { 1838 const struct vnodeop_desc *a_desc; 1839 struct vnode *a_dvp; 1840 struct vnode *a_vp; 1841 struct componentname *a_cnp; 1842 } */ *ap = v; 1843 PUFFS_MSG_VARS(vn, remove); 1844 struct vnode *dvp = ap->a_dvp; 1845 struct vnode *vp = ap->a_vp; 1846 struct puffs_node *dpn = VPTOPP(dvp); 1847 struct puffs_node *pn = VPTOPP(vp); 1848 struct componentname *cnp = ap->a_cnp; 1849 struct mount *mp = dvp->v_mount; 1850 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1851 int error; 1852 1853 PUFFS_MSG_ALLOC(vn, remove); 1854 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1855 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1856 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1857 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1858 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1859 1860 puffs_msg_enqueue(pmp, park_remove); 1861 vref(dvp); /* hang onto caller's reference at end */ 1862 REFPN(dpn); 1863 if (dvp == vp) 1864 REFPN(pn); 1865 else 1866 REFPN_AND_UNLOCKVP(vp, pn); 1867 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1868 1869 PUFFS_MSG_RELEASE(remove); 1870 1871 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1872 1873 RELEPN_AND_VP(dvp, dpn); 1874 RELEPN_AND_VP(vp, pn); 1875 1876 error = checkerr(pmp, error, __func__); 1877 return error; 1878 } 1879 1880 int 1881 puffs_vnop_mkdir(void *v) 1882 { 1883 struct vop_mkdir_v3_args /* { 1884 const struct vnodeop_desc *a_desc; 1885 struct vnode *a_dvp; 1886 struct vnode **a_vpp; 1887 struct componentname *a_cnp; 1888 struct vattr *a_vap; 1889 } */ *ap = v; 1890 PUFFS_MSG_VARS(vn, mkdir); 1891 struct vnode *dvp = ap->a_dvp; 1892 struct puffs_node *dpn = VPTOPP(dvp); 1893 struct componentname *cnp = ap->a_cnp; 1894 struct mount *mp = dvp->v_mount; 1895 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1896 int error; 1897 1898 PUFFS_MSG_ALLOC(vn, mkdir); 1899 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1900 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1901 mkdir_msg->pvnr_va = *ap->a_vap; 1902 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1903 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1904 1905 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1906 1907 error = checkerr(pmp, error, __func__); 1908 if (error) 1909 goto out; 1910 1911 error = puffs_newnode(mp, dvp, ap->a_vpp, 1912 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1913 if (error) { 1914 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1915 mkdir_msg->pvnr_newnode, cnp); 1916 goto out; 1917 } 1918 1919 if (PUFFS_USE_FS_TTL(pmp)) { 1920 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1921 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1922 struct vattr *rvap = &mkdir_msg->pvnr_va; 1923 1924 update_va(*ap->a_vpp, NULL, rvap, 1925 va_ttl, cn_ttl, SETATTR_CHSIZE); 1926 } 1927 1928 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1929 1930 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1931 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1932 update_parent(*ap->a_vpp, dvp); 1933 1934 out: 1935 PUFFS_MSG_RELEASE(mkdir); 1936 return error; 1937 } 1938 1939 static int 1940 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1941 struct componentname *cnp) 1942 { 1943 PUFFS_MSG_VARS(vn, rmdir); 1944 int error; 1945 1946 PUFFS_MSG_ALLOC(vn, rmdir); 1947 rmdir_msg->pvnr_cookie_targ = ck; 1948 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1949 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1950 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1951 1952 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1953 PUFFS_MSG_RELEASE(rmdir); 1954 1955 return checkerr(pmp, error, __func__); 1956 } 1957 1958 int 1959 puffs_vnop_rmdir(void *v) 1960 { 1961 struct vop_rmdir_v2_args /* { 1962 const struct vnodeop_desc *a_desc; 1963 struct vnode *a_dvp; 1964 struct vnode *a_vp; 1965 struct componentname *a_cnp; 1966 } */ *ap = v; 1967 PUFFS_MSG_VARS(vn, rmdir); 1968 struct vnode *dvp = ap->a_dvp; 1969 struct vnode *vp = ap->a_vp; 1970 struct puffs_node *dpn = VPTOPP(dvp); 1971 struct puffs_node *pn = VPTOPP(vp); 1972 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1973 struct componentname *cnp = ap->a_cnp; 1974 int error; 1975 1976 PUFFS_MSG_ALLOC(vn, rmdir); 1977 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1978 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1979 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1980 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1981 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1982 1983 puffs_msg_enqueue(pmp, park_rmdir); 1984 vref(dvp); /* hang onto caller's reference at end */ 1985 KASSERTMSG((dvp != vp), "rmdir ."); 1986 REFPN(dpn); 1987 REFPN_AND_UNLOCKVP(vp, pn); 1988 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1989 1990 PUFFS_MSG_RELEASE(rmdir); 1991 1992 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1993 1994 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1995 RELEPN_AND_VP(dvp, dpn); 1996 RELEPN_AND_VP(vp, pn); 1997 1998 return error; 1999 } 2000 2001 int 2002 puffs_vnop_link(void *v) 2003 { 2004 struct vop_link_v2_args /* { 2005 const struct vnodeop_desc *a_desc; 2006 struct vnode *a_dvp; 2007 struct vnode *a_vp; 2008 struct componentname *a_cnp; 2009 } */ *ap = v; 2010 PUFFS_MSG_VARS(vn, link); 2011 struct vnode *dvp = ap->a_dvp; 2012 struct vnode *vp = ap->a_vp; 2013 struct puffs_node *dpn = VPTOPP(dvp); 2014 struct puffs_node *pn = VPTOPP(vp); 2015 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2016 struct componentname *cnp = ap->a_cnp; 2017 int error; 2018 2019 PUFFS_MSG_ALLOC(vn, link); 2020 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 2021 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 2022 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2023 puffs_msg_setinfo(park_link, PUFFSOP_VN, 2024 PUFFS_VN_LINK, VPTOPNC(dvp)); 2025 2026 puffs_msg_enqueue(pmp, park_link); 2027 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 2028 2029 PUFFS_MSG_RELEASE(link); 2030 2031 error = checkerr(pmp, error, __func__); 2032 2033 /* 2034 * XXX: stay in touch with the cache. I don't like this, but 2035 * don't have a better solution either. See also puffs_rename(). 2036 */ 2037 if (error == 0) { 2038 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 2039 puffs_updatenode(VPTOPP(dvp), 2040 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2041 } 2042 2043 return error; 2044 } 2045 2046 int 2047 puffs_vnop_symlink(void *v) 2048 { 2049 struct vop_symlink_v3_args /* { 2050 const struct vnodeop_desc *a_desc; 2051 struct vnode *a_dvp; 2052 struct vnode **a_vpp; 2053 struct componentname *a_cnp; 2054 struct vattr *a_vap; 2055 char *a_target; 2056 } */ *ap = v; 2057 PUFFS_MSG_VARS(vn, symlink); 2058 struct vnode *dvp = ap->a_dvp; 2059 struct puffs_node *dpn = VPTOPP(dvp); 2060 struct mount *mp = dvp->v_mount; 2061 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2062 struct componentname *cnp = ap->a_cnp; 2063 int error; 2064 2065 *ap->a_vpp = NULL; 2066 2067 PUFFS_MSG_ALLOC(vn, symlink); 2068 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2069 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2070 symlink_msg->pvnr_va = *ap->a_vap; 2071 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2072 sizeof(symlink_msg->pvnr_link)); 2073 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2074 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2075 2076 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2077 2078 error = checkerr(pmp, error, __func__); 2079 if (error) 2080 goto out; 2081 2082 error = puffs_newnode(mp, dvp, ap->a_vpp, 2083 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2084 if (error) { 2085 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2086 symlink_msg->pvnr_newnode, cnp); 2087 goto out; 2088 } 2089 2090 if (PUFFS_USE_FS_TTL(pmp)) { 2091 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2092 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2093 struct vattr *rvap = &symlink_msg->pvnr_va; 2094 2095 update_va(*ap->a_vpp, NULL, rvap, 2096 va_ttl, cn_ttl, SETATTR_CHSIZE); 2097 } 2098 2099 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2100 2101 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2102 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2103 update_parent(*ap->a_vpp, dvp); 2104 2105 out: 2106 PUFFS_MSG_RELEASE(symlink); 2107 2108 return error; 2109 } 2110 2111 int 2112 puffs_vnop_readlink(void *v) 2113 { 2114 struct vop_readlink_args /* { 2115 const struct vnodeop_desc *a_desc; 2116 struct vnode *a_vp; 2117 struct uio *a_uio; 2118 kauth_cred_t a_cred; 2119 } */ *ap = v; 2120 PUFFS_MSG_VARS(vn, readlink); 2121 struct vnode *vp = ap->a_vp; 2122 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2123 size_t linklen; 2124 int error; 2125 2126 PUFFS_MSG_ALLOC(vn, readlink); 2127 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2128 linklen = sizeof(readlink_msg->pvnr_link); 2129 readlink_msg->pvnr_linklen = linklen; 2130 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2131 PUFFS_VN_READLINK, VPTOPNC(vp)); 2132 2133 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2134 error = checkerr(pmp, error, __func__); 2135 if (error) 2136 goto out; 2137 2138 /* bad bad user file server */ 2139 if (readlink_msg->pvnr_linklen > linklen) { 2140 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2141 "linklen too big", VPTOPNC(ap->a_vp)); 2142 error = EPROTO; 2143 goto out; 2144 } 2145 2146 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2147 ap->a_uio); 2148 out: 2149 PUFFS_MSG_RELEASE(readlink); 2150 return error; 2151 } 2152 2153 int 2154 puffs_vnop_rename(void *v) 2155 { 2156 struct vop_rename_args /* { 2157 const struct vnodeop_desc *a_desc; 2158 struct vnode *a_fdvp; 2159 struct vnode *a_fvp; 2160 struct componentname *a_fcnp; 2161 struct vnode *a_tdvp; 2162 struct vnode *a_tvp; 2163 struct componentname *a_tcnp; 2164 } */ *ap = v; 2165 PUFFS_MSG_VARS(vn, rename); 2166 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2167 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2168 struct puffs_node *fpn = ap->a_fvp->v_data; 2169 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2170 int error; 2171 bool doabort = true; 2172 2173 if ((fvp->v_mount != tdvp->v_mount) || 2174 (tvp && (fvp->v_mount != tvp->v_mount))) { 2175 ERROUT(EXDEV); 2176 } 2177 2178 PUFFS_MSG_ALLOC(vn, rename); 2179 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2180 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2181 if (tvp) 2182 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2183 else 2184 rename_msg->pvnr_cookie_targ = NULL; 2185 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2186 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2187 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2188 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2189 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2190 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2191 2192 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2193 doabort = false; 2194 PUFFS_MSG_RELEASE(rename); 2195 error = checkerr(pmp, error, __func__); 2196 2197 /* 2198 * XXX: stay in touch with the cache. I don't like this, but 2199 * don't have a better solution either. See also puffs_link(). 2200 */ 2201 if (error == 0) { 2202 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2203 puffs_updatenode(VPTOPP(fdvp), 2204 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2205 if (fdvp != tdvp) 2206 puffs_updatenode(VPTOPP(tdvp), 2207 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 2208 0); 2209 2210 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2211 (VPTOPP(fvp)->pn_parent != tdvp)) 2212 update_parent(fvp, tdvp); 2213 } 2214 2215 2216 out: 2217 if (doabort) 2218 VOP_ABORTOP(tdvp, ap->a_tcnp); 2219 if (tvp != NULL) 2220 vput(tvp); 2221 if (tdvp == tvp) 2222 vrele(tdvp); 2223 else 2224 vput(tdvp); 2225 2226 if (doabort) 2227 VOP_ABORTOP(fdvp, ap->a_fcnp); 2228 vrele(fdvp); 2229 vrele(fvp); 2230 2231 return error; 2232 } 2233 2234 #define RWARGS(cont, iofl, move, offset, creds) \ 2235 (cont)->pvnr_ioflag = (iofl); \ 2236 (cont)->pvnr_resid = (move); \ 2237 (cont)->pvnr_offset = (offset); \ 2238 puffs_credcvt(&(cont)->pvnr_cred, creds) 2239 2240 int 2241 puffs_vnop_read(void *v) 2242 { 2243 struct vop_read_args /* { 2244 const struct vnodeop_desc *a_desc; 2245 struct vnode *a_vp; 2246 struct uio *a_uio; 2247 int a_ioflag; 2248 kauth_cred_t a_cred; 2249 } */ *ap = v; 2250 PUFFS_MSG_VARS(vn, read); 2251 struct vnode *vp = ap->a_vp; 2252 struct puffs_node *pn = VPTOPP(vp); 2253 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2254 struct uio *uio = ap->a_uio; 2255 size_t tomove, argsize; 2256 vsize_t bytelen; 2257 int error; 2258 2259 read_msg = NULL; 2260 error = 0; 2261 2262 /* std sanity */ 2263 if (uio->uio_resid == 0) 2264 return 0; 2265 if (uio->uio_offset < 0) 2266 return EFBIG; 2267 2268 /* 2269 * On the case of reading empty files and (vp->v_size != 0) below: 2270 * some filesystems (hint: FUSE and distributed filesystems) still 2271 * expect to get the READ in order to update atime. Reading through 2272 * the case filters empty files, therefore we prefer to bypass the 2273 * cache here. 2274 */ 2275 if (vp->v_type == VREG && 2276 PUFFS_USE_PAGECACHE(pmp) && 2277 !(pn->pn_stat & PNODE_RDIRECT) && 2278 (vp->v_size != 0)) { 2279 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2280 2281 while (uio->uio_resid > 0) { 2282 if (vp->v_size <= uio->uio_offset) { 2283 break; 2284 } 2285 bytelen = MIN(uio->uio_resid, 2286 vp->v_size - uio->uio_offset); 2287 if (bytelen == 0) 2288 break; 2289 2290 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2291 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2292 if (error) 2293 break; 2294 } 2295 2296 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2297 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2298 } else { 2299 /* 2300 * in case it's not a regular file or we're operating 2301 * uncached, do read in the old-fashioned style, 2302 * i.e. explicit read operations 2303 */ 2304 2305 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2306 argsize = sizeof(struct puffs_vnmsg_read); 2307 puffs_msgmem_alloc(argsize + tomove, &park_read, 2308 (void *)&read_msg, 1); 2309 2310 error = 0; 2311 while (uio->uio_resid > 0) { 2312 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2313 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2314 RWARGS(read_msg, ap->a_ioflag, tomove, 2315 uio->uio_offset, ap->a_cred); 2316 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2317 PUFFS_VN_READ, VPTOPNC(vp)); 2318 puffs_msg_setdelta(park_read, tomove); 2319 2320 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2321 NULL, error); 2322 error = checkerr(pmp, error, __func__); 2323 if (error) 2324 break; 2325 2326 if (read_msg->pvnr_resid > tomove) { 2327 puffs_senderr(pmp, PUFFS_ERR_READ, 2328 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2329 error = EPROTO; 2330 break; 2331 } 2332 2333 error = uiomove(read_msg->pvnr_data, 2334 tomove - read_msg->pvnr_resid, uio); 2335 2336 /* 2337 * in case the file is out of juice, resid from 2338 * userspace is != 0. and the error-case is 2339 * quite obvious 2340 */ 2341 if (error || read_msg->pvnr_resid) 2342 break; 2343 } 2344 2345 puffs_msgmem_release(park_read); 2346 } 2347 2348 return error; 2349 } 2350 2351 /* 2352 * XXX: in case of a failure, this leaves uio in a bad state. 2353 * We could theoretically copy the uio and iovecs and "replay" 2354 * them the right amount after the userspace trip, but don't 2355 * bother for now. 2356 */ 2357 int 2358 puffs_vnop_write(void *v) 2359 { 2360 struct vop_write_args /* { 2361 const struct vnodeop_desc *a_desc; 2362 struct vnode *a_vp; 2363 struct uio *a_uio; 2364 int a_ioflag; 2365 kauth_cred_t a_cred; 2366 } */ *ap = v; 2367 PUFFS_MSG_VARS(vn, write); 2368 struct vnode *vp = ap->a_vp; 2369 struct puffs_node *pn = VPTOPP(vp); 2370 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2371 struct uio *uio = ap->a_uio; 2372 size_t tomove, argsize; 2373 off_t oldoff, newoff, origoff; 2374 vsize_t bytelen; 2375 int error, uflags; 2376 int ubcflags; 2377 2378 error = uflags = 0; 2379 write_msg = NULL; 2380 2381 /* std sanity */ 2382 if (uio->uio_resid == 0) 2383 return 0; 2384 if (uio->uio_offset < 0) 2385 return EFBIG; 2386 2387 mutex_enter(&pn->pn_sizemtx); 2388 2389 /* 2390 * userspace *should* be allowed to control this, 2391 * but with UBC it's a bit unclear how to handle it 2392 */ 2393 if (ap->a_ioflag & IO_APPEND) 2394 uio->uio_offset = vp->v_size; 2395 2396 origoff = uio->uio_offset; 2397 2398 if (vp->v_type == VREG && 2399 PUFFS_USE_PAGECACHE(pmp) && 2400 !(pn->pn_stat & PNODE_WDIRECT)) { 2401 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2402 2403 while (uio->uio_resid > 0) { 2404 oldoff = uio->uio_offset; 2405 bytelen = uio->uio_resid; 2406 2407 newoff = oldoff + bytelen; 2408 if (vp->v_size < newoff) { 2409 uvm_vnp_setwritesize(vp, newoff); 2410 } 2411 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2412 UVM_ADV_RANDOM, ubcflags); 2413 2414 /* 2415 * In case of a ubc_uiomove() error, 2416 * opt to not extend the file at all and 2417 * return an error. Otherwise, if we attempt 2418 * to clear the memory we couldn't fault to, 2419 * we might generate a kernel page fault. 2420 */ 2421 if (vp->v_size < newoff) { 2422 if (error == 0) { 2423 uflags |= PUFFS_UPDATESIZE; 2424 uvm_vnp_setsize(vp, newoff); 2425 } else { 2426 uvm_vnp_setwritesize(vp, vp->v_size); 2427 } 2428 } 2429 if (error) 2430 break; 2431 2432 /* 2433 * If we're writing large files, flush to file server 2434 * every 64k. Otherwise we can very easily exhaust 2435 * kernel and user memory, as the file server cannot 2436 * really keep up with our writing speed. 2437 * 2438 * Note: this does *NOT* honor MNT_ASYNC, because 2439 * that gives userland too much say in the kernel. 2440 */ 2441 if (oldoff >> 16 != uio->uio_offset >> 16) { 2442 mutex_enter(vp->v_interlock); 2443 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2444 uio->uio_offset & ~0xffff, 2445 PGO_CLEANIT | PGO_SYNCIO); 2446 if (error) 2447 break; 2448 } 2449 } 2450 2451 /* synchronous I/O? */ 2452 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2453 mutex_enter(vp->v_interlock); 2454 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2455 round_page(uio->uio_offset), 2456 PGO_CLEANIT | PGO_SYNCIO); 2457 2458 /* write through page cache? */ 2459 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2460 mutex_enter(vp->v_interlock); 2461 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2462 round_page(uio->uio_offset), PGO_CLEANIT); 2463 } 2464 } else { 2465 /* tomove is non-increasing */ 2466 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2467 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2468 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2469 2470 while (uio->uio_resid > 0) { 2471 /* move data to buffer */ 2472 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2473 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2474 RWARGS(write_msg, ap->a_ioflag, tomove, 2475 uio->uio_offset, ap->a_cred); 2476 error = uiomove(write_msg->pvnr_data, tomove, uio); 2477 if (error) 2478 break; 2479 2480 /* move buffer to userspace */ 2481 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2482 PUFFS_VN_WRITE, VPTOPNC(vp)); 2483 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2484 NULL, error); 2485 error = checkerr(pmp, error, __func__); 2486 if (error) 2487 break; 2488 2489 if (write_msg->pvnr_resid > tomove) { 2490 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2491 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2492 error = EPROTO; 2493 break; 2494 } 2495 2496 /* adjust file size */ 2497 if (vp->v_size < uio->uio_offset) { 2498 uflags |= PUFFS_UPDATESIZE; 2499 uvm_vnp_setsize(vp, uio->uio_offset); 2500 } 2501 2502 /* didn't move everything? bad userspace. bail */ 2503 if (write_msg->pvnr_resid != 0) { 2504 error = EIO; 2505 break; 2506 } 2507 } 2508 puffs_msgmem_release(park_write); 2509 2510 /* 2511 * Direct I/O on write but not on read: we must 2512 * invlidate the written pages so that we read 2513 * the written data and not the stalled cache. 2514 */ 2515 if ((error == 0) && 2516 (vp->v_type == VREG) && PUFFS_USE_PAGECACHE(pmp) && 2517 (pn->pn_stat & PNODE_WDIRECT) && 2518 !(pn->pn_stat & PNODE_RDIRECT)) { 2519 voff_t off_lo = trunc_page(origoff); 2520 voff_t off_hi = round_page(uio->uio_offset); 2521 2522 mutex_enter(vp->v_uobj.vmobjlock); 2523 error = VOP_PUTPAGES(vp, off_lo, off_hi, PGO_FREE); 2524 } 2525 } 2526 2527 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2528 uflags |= PUFFS_UPDATEATIME; 2529 uflags |= PUFFS_UPDATECTIME; 2530 uflags |= PUFFS_UPDATEMTIME; 2531 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2532 2533 /* 2534 * If we do not use meta flush, we need to update the 2535 * filesystem now, otherwise we will get a stale value 2536 * on the next GETATTR 2537 */ 2538 if (!PUFFS_USE_METAFLUSH(pmp) && (uflags & PUFFS_UPDATESIZE)) { 2539 struct vattr va; 2540 int ret; 2541 2542 vattr_null(&va); 2543 va.va_size = vp->v_size; 2544 ret = dosetattr(vp, &va, FSCRED, 0); 2545 if (ret) { 2546 DPRINTF(("dosetattr set size to %jd failed: %d\n", 2547 (intmax_t)vp->v_size, ret)); 2548 } 2549 } 2550 mutex_exit(&pn->pn_sizemtx); 2551 return error; 2552 } 2553 2554 int 2555 puffs_vnop_fallocate(void *v) 2556 { 2557 struct vop_fallocate_args /* { 2558 const struct vnodeop_desc *a_desc; 2559 struct vnode *a_vp; 2560 off_t a_pos; 2561 off_t a_len; 2562 } */ *ap = v; 2563 struct vnode *vp = ap->a_vp; 2564 struct puffs_node *pn = VPTOPP(vp); 2565 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2566 PUFFS_MSG_VARS(vn, fallocate); 2567 int error; 2568 2569 mutex_enter(&pn->pn_sizemtx); 2570 2571 PUFFS_MSG_ALLOC(vn, fallocate); 2572 fallocate_msg->pvnr_off = ap->a_pos; 2573 fallocate_msg->pvnr_len = ap->a_len; 2574 puffs_msg_setinfo(park_fallocate, PUFFSOP_VN, 2575 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2576 2577 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fallocate, vp->v_data, NULL, error); 2578 error = checkerr(pmp, error, __func__); 2579 PUFFS_MSG_RELEASE(fallocate); 2580 2581 switch (error) { 2582 case 0: 2583 break; 2584 case EAGAIN: 2585 error = EIO; 2586 /* FALLTHROUGH */ 2587 default: 2588 goto out; 2589 } 2590 2591 if (ap->a_pos + ap->a_len > vp->v_size) { 2592 uvm_vnp_setsize(vp, ap->a_pos + ap->a_len); 2593 puffs_updatenode(pn, PUFFS_UPDATESIZE, vp->v_size); 2594 } 2595 out: 2596 mutex_exit(&pn->pn_sizemtx); 2597 2598 return error; 2599 } 2600 2601 int 2602 puffs_vnop_fdiscard(void *v) 2603 { 2604 struct vop_fdiscard_args /* { 2605 const struct vnodeop_desc *a_desc; 2606 struct vnode *a_vp; 2607 off_t a_pos; 2608 off_t a_len; 2609 } */ *ap = v; 2610 struct vnode *vp = ap->a_vp; 2611 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2612 PUFFS_MSG_VARS(vn, fdiscard); 2613 int error; 2614 2615 PUFFS_MSG_ALLOC(vn, fdiscard); 2616 fdiscard_msg->pvnr_off = ap->a_pos; 2617 fdiscard_msg->pvnr_len = ap->a_len; 2618 puffs_msg_setinfo(park_fdiscard, PUFFSOP_VN, 2619 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2620 2621 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fdiscard, vp->v_data, NULL, error); 2622 error = checkerr(pmp, error, __func__); 2623 PUFFS_MSG_RELEASE(fdiscard); 2624 2625 return error; 2626 } 2627 2628 int 2629 puffs_vnop_print(void *v) 2630 { 2631 struct vop_print_args /* { 2632 struct vnode *a_vp; 2633 } */ *ap = v; 2634 PUFFS_MSG_VARS(vn, print); 2635 struct vnode *vp = ap->a_vp; 2636 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2637 struct puffs_node *pn = vp->v_data; 2638 2639 /* kernel portion */ 2640 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2641 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2642 if (vp->v_type == VFIFO) 2643 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2644 printf("\n"); 2645 2646 /* userspace portion */ 2647 if (EXISTSOP(pmp, PRINT)) { 2648 PUFFS_MSG_ALLOC(vn, print); 2649 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2650 PUFFS_VN_PRINT, VPTOPNC(vp)); 2651 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2652 NULL); 2653 PUFFS_MSG_RELEASE(print); 2654 } 2655 2656 return 0; 2657 } 2658 2659 int 2660 puffs_vnop_pathconf(void *v) 2661 { 2662 struct vop_pathconf_args /* { 2663 const struct vnodeop_desc *a_desc; 2664 struct vnode *a_vp; 2665 int a_name; 2666 register_t *a_retval; 2667 } */ *ap = v; 2668 PUFFS_MSG_VARS(vn, pathconf); 2669 struct vnode *vp = ap->a_vp; 2670 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2671 int error; 2672 2673 PUFFS_MSG_ALLOC(vn, pathconf); 2674 pathconf_msg->pvnr_name = ap->a_name; 2675 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2676 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2677 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2678 error = checkerr(pmp, error, __func__); 2679 if (!error) 2680 *ap->a_retval = pathconf_msg->pvnr_retval; 2681 PUFFS_MSG_RELEASE(pathconf); 2682 2683 return error; 2684 } 2685 2686 int 2687 puffs_vnop_advlock(void *v) 2688 { 2689 struct vop_advlock_args /* { 2690 const struct vnodeop_desc *a_desc; 2691 struct vnode *a_vp; 2692 void *a_id; 2693 int a_op; 2694 struct flock *a_fl; 2695 int a_flags; 2696 } */ *ap = v; 2697 PUFFS_MSG_VARS(vn, advlock); 2698 struct vnode *vp = ap->a_vp; 2699 struct puffs_node *pn = VPTOPP(vp); 2700 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2701 int error; 2702 2703 if (!EXISTSOP(pmp, ADVLOCK)) 2704 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2705 2706 PUFFS_MSG_ALLOC(vn, advlock); 2707 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2708 sizeof(advlock_msg->pvnr_fl)); 2709 advlock_msg->pvnr_id = ap->a_id; 2710 advlock_msg->pvnr_op = ap->a_op; 2711 advlock_msg->pvnr_flags = ap->a_flags; 2712 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2713 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2714 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2715 error = checkerr(pmp, error, __func__); 2716 PUFFS_MSG_RELEASE(advlock); 2717 2718 return error; 2719 } 2720 2721 int 2722 puffs_vnop_abortop(void *v) 2723 { 2724 struct vop_abortop_args /* { 2725 struct vnode *a_dvp; 2726 struct componentname *a_cnp; 2727 }; */ *ap = v; 2728 PUFFS_MSG_VARS(vn, abortop); 2729 struct vnode *dvp = ap->a_dvp; 2730 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2731 struct componentname *cnp = ap->a_cnp; 2732 2733 if (EXISTSOP(pmp, ABORTOP)) { 2734 PUFFS_MSG_ALLOC(vn, abortop); 2735 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2736 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2737 puffs_msg_setfaf(park_abortop); 2738 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2739 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2740 2741 puffs_msg_enqueue(pmp, park_abortop); 2742 PUFFS_MSG_RELEASE(abortop); 2743 } 2744 2745 return genfs_abortop(v); 2746 } 2747 2748 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2749 2750 /* 2751 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2752 */ 2753 int 2754 puffs_vnop_strategy(void *v) 2755 { 2756 struct vop_strategy_args /* { 2757 const struct vnodeop_desc *a_desc; 2758 struct vnode *a_vp; 2759 struct buf *a_bp; 2760 } */ *ap = v; 2761 PUFFS_MSG_VARS(vn, rw); 2762 struct vnode *vp = ap->a_vp; 2763 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2764 struct puffs_node *pn; 2765 struct buf *bp; 2766 size_t argsize; 2767 size_t tomove, moved; 2768 int error, dofaf, cansleep, dobiodone; 2769 2770 pmp = MPTOPUFFSMP(vp->v_mount); 2771 bp = ap->a_bp; 2772 error = 0; 2773 dofaf = 0; 2774 cansleep = 0; 2775 pn = VPTOPP(vp); 2776 park_rw = NULL; /* explicit */ 2777 dobiodone = 1; 2778 2779 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2780 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2781 ERROUT(EOPNOTSUPP); 2782 2783 /* 2784 * Short-circuit optimization: don't flush buffer in between 2785 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2786 */ 2787 if (pn->pn_stat & PNODE_DYING) { 2788 KASSERT(BUF_ISWRITE(bp)); 2789 bp->b_resid = 0; 2790 goto out; 2791 } 2792 2793 #ifdef DIAGNOSTIC 2794 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2795 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2796 bp->b_bcount); 2797 #endif 2798 2799 /* 2800 * See explanation for the necessity of a FAF in puffs_fsync. 2801 * 2802 * Also, do FAF in case we're suspending. 2803 * See puffs_vfsops.c:pageflush() 2804 */ 2805 if (BUF_ISWRITE(bp)) { 2806 mutex_enter(vp->v_interlock); 2807 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2808 dofaf = 1; 2809 if (pn->pn_stat & PNODE_FAF) 2810 dofaf = 1; 2811 mutex_exit(vp->v_interlock); 2812 } 2813 2814 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2815 2816 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2817 2818 /* allocate transport structure */ 2819 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2820 argsize = sizeof(struct puffs_vnmsg_rw); 2821 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2822 (void *)&rw_msg, cansleep); 2823 if (error) 2824 goto out; 2825 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2826 2827 /* 2x2 cases: read/write, faf/nofaf */ 2828 if (BUF_ISREAD(bp)) { 2829 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2830 PUFFS_VN_READ, VPTOPNC(vp)); 2831 puffs_msg_setdelta(park_rw, tomove); 2832 if (BIOASYNC(bp)) { 2833 puffs_msg_setcall(park_rw, 2834 puffs_parkdone_asyncbioread, bp); 2835 puffs_msg_enqueue(pmp, park_rw); 2836 dobiodone = 0; 2837 } else { 2838 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2839 NULL, error); 2840 error = checkerr(pmp, error, __func__); 2841 if (error) 2842 goto out; 2843 2844 if (rw_msg->pvnr_resid > tomove) { 2845 puffs_senderr(pmp, PUFFS_ERR_READ, 2846 E2BIG, "resid grew", VPTOPNC(vp)); 2847 ERROUT(EPROTO); 2848 } 2849 2850 moved = tomove - rw_msg->pvnr_resid; 2851 2852 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2853 bp->b_resid = bp->b_bcount - moved; 2854 } 2855 } else { 2856 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2857 PUFFS_VN_WRITE, VPTOPNC(vp)); 2858 /* 2859 * make pages read-only before we write them if we want 2860 * write caching info 2861 */ 2862 if (PUFFS_WCACHEINFO(pmp)) { 2863 struct uvm_object *uobj = &vp->v_uobj; 2864 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2865 struct vm_page *vmp; 2866 int i; 2867 2868 for (i = 0; i < npages; i++) { 2869 vmp= uvm_pageratop((vaddr_t)bp->b_data 2870 + (i << PAGE_SHIFT)); 2871 DPRINTF(("puffs_strategy: write-protecting " 2872 "vp %p page %p, offset %" PRId64"\n", 2873 vp, vmp, vmp->offset)); 2874 mutex_enter(uobj->vmobjlock); 2875 vmp->flags |= PG_RDONLY; 2876 pmap_page_protect(vmp, VM_PROT_READ); 2877 mutex_exit(uobj->vmobjlock); 2878 } 2879 } 2880 2881 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2882 if (dofaf) { 2883 puffs_msg_setfaf(park_rw); 2884 } else if (BIOASYNC(bp)) { 2885 puffs_msg_setcall(park_rw, 2886 puffs_parkdone_asyncbiowrite, bp); 2887 dobiodone = 0; 2888 } 2889 2890 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2891 2892 if (dobiodone == 0) 2893 goto out; 2894 2895 error = checkerr(pmp, error, __func__); 2896 if (error) 2897 goto out; 2898 2899 if (rw_msg->pvnr_resid > tomove) { 2900 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2901 E2BIG, "resid grew", VPTOPNC(vp)); 2902 ERROUT(EPROTO); 2903 } 2904 2905 /* 2906 * FAF moved everything. Frankly, we don't 2907 * really have a choice. 2908 */ 2909 if (dofaf && error == 0) 2910 moved = tomove; 2911 else 2912 moved = tomove - rw_msg->pvnr_resid; 2913 2914 bp->b_resid = bp->b_bcount - moved; 2915 if (bp->b_resid != 0) { 2916 ERROUT(EIO); 2917 } 2918 } 2919 2920 out: 2921 if (park_rw) 2922 puffs_msgmem_release(park_rw); 2923 2924 if (error) 2925 bp->b_error = error; 2926 2927 if (error || dobiodone) 2928 biodone(bp); 2929 2930 return error; 2931 } 2932 2933 int 2934 puffs_vnop_mmap(void *v) 2935 { 2936 struct vop_mmap_args /* { 2937 const struct vnodeop_desc *a_desc; 2938 struct vnode *a_vp; 2939 vm_prot_t a_prot; 2940 kauth_cred_t a_cred; 2941 } */ *ap = v; 2942 PUFFS_MSG_VARS(vn, mmap); 2943 struct vnode *vp = ap->a_vp; 2944 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2945 int error; 2946 2947 if (!PUFFS_USE_PAGECACHE(pmp)) 2948 return genfs_eopnotsupp(v); 2949 2950 if (EXISTSOP(pmp, MMAP)) { 2951 PUFFS_MSG_ALLOC(vn, mmap); 2952 mmap_msg->pvnr_prot = ap->a_prot; 2953 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2954 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2955 PUFFS_VN_MMAP, VPTOPNC(vp)); 2956 2957 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2958 error = checkerr(pmp, error, __func__); 2959 PUFFS_MSG_RELEASE(mmap); 2960 } else { 2961 error = genfs_mmap(v); 2962 } 2963 2964 return error; 2965 } 2966 2967 2968 /* 2969 * The rest don't get a free trip to userspace and back, they 2970 * have to stay within the kernel. 2971 */ 2972 2973 /* 2974 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2975 * well, maybe somehow, somewhere, some day .... 2976 */ 2977 int 2978 puffs_vnop_bmap(void *v) 2979 { 2980 struct vop_bmap_args /* { 2981 const struct vnodeop_desc *a_desc; 2982 struct vnode *a_vp; 2983 daddr_t a_bn; 2984 struct vnode **a_vpp; 2985 daddr_t *a_bnp; 2986 int *a_runp; 2987 } */ *ap = v; 2988 struct puffs_mount *pmp; 2989 2990 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2991 2992 if (ap->a_vpp) 2993 *ap->a_vpp = ap->a_vp; 2994 if (ap->a_bnp) 2995 *ap->a_bnp = ap->a_bn; 2996 if (ap->a_runp) 2997 *ap->a_runp 2998 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2999 3000 return 0; 3001 } 3002 3003 /* 3004 * Handle getpages faults in puffs. We let genfs_getpages() do most 3005 * of the dirty work, but we come in this route to do accounting tasks. 3006 * If the user server has specified functions for cache notifications 3007 * about reads and/or writes, we record which type of operation we got, 3008 * for which page range, and proceed to issue a FAF notification to the 3009 * server about it. 3010 */ 3011 int 3012 puffs_vnop_getpages(void *v) 3013 { 3014 struct vop_getpages_args /* { 3015 const struct vnodeop_desc *a_desc; 3016 struct vnode *a_vp; 3017 voff_t a_offset; 3018 struct vm_page **a_m; 3019 int *a_count; 3020 int a_centeridx; 3021 vm_prot_t a_access_type; 3022 int a_advice; 3023 int a_flags; 3024 } */ *ap = v; 3025 struct puffs_mount *pmp; 3026 struct puffs_node *pn; 3027 struct vnode *vp; 3028 struct vm_page **pgs; 3029 struct puffs_cacheinfo *pcinfo = NULL; 3030 struct puffs_cacherun *pcrun; 3031 void *parkmem = NULL; 3032 size_t runsizes; 3033 int i, npages, si, streakon; 3034 int error, locked, write; 3035 3036 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 3037 npages = *ap->a_count; 3038 pgs = ap->a_m; 3039 vp = ap->a_vp; 3040 pn = vp->v_data; 3041 locked = (ap->a_flags & PGO_LOCKED) != 0; 3042 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 3043 3044 /* ccg xnaht - gets Wuninitialized wrong */ 3045 pcrun = NULL; 3046 runsizes = 0; 3047 3048 /* 3049 * Check that we aren't trying to fault in pages which our file 3050 * server doesn't know about. This happens if we extend a file by 3051 * skipping some pages and later try to fault in pages which 3052 * are between pn_serversize and vp_size. This check optimizes 3053 * away the common case where a file is being extended. 3054 */ 3055 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 3056 struct vattr va; 3057 3058 /* try again later when we can block */ 3059 if (locked) 3060 ERROUT(EBUSY); 3061 3062 mutex_exit(vp->v_interlock); 3063 vattr_null(&va); 3064 va.va_size = vp->v_size; 3065 error = dosetattr(vp, &va, FSCRED, 0); 3066 if (error) 3067 ERROUT(error); 3068 mutex_enter(vp->v_interlock); 3069 } 3070 3071 if (write && PUFFS_WCACHEINFO(pmp)) { 3072 #ifdef notnowjohn 3073 /* allocate worst-case memory */ 3074 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 3075 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 3076 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 3077 locked ? KM_NOSLEEP : KM_SLEEP); 3078 3079 /* 3080 * can't block if we're locked and can't mess up caching 3081 * information for fs server. so come back later, please 3082 */ 3083 if (pcinfo == NULL) 3084 ERROUT(ENOMEM); 3085 3086 parkmem = puffs_park_alloc(locked == 0); 3087 if (parkmem == NULL) 3088 ERROUT(ENOMEM); 3089 3090 pcrun = pcinfo->pcache_runs; 3091 #else 3092 (void)parkmem; 3093 #endif 3094 } 3095 3096 error = genfs_getpages(v); 3097 if (error) 3098 goto out; 3099 3100 if (PUFFS_WCACHEINFO(pmp) == 0) 3101 goto out; 3102 3103 /* 3104 * Let's see whose fault it was and inform the user server of 3105 * possibly read/written pages. Map pages from read faults 3106 * strictly read-only, since otherwise we might miss info on 3107 * when the page is actually write-faulted to. 3108 */ 3109 if (!locked) 3110 mutex_enter(vp->v_uobj.vmobjlock); 3111 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 3112 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 3113 if (streakon && write) { 3114 streakon = 0; 3115 pcrun[si].pcache_runend 3116 = trunc_page(pgs[i]->offset) + PAGE_MASK; 3117 si++; 3118 } 3119 continue; 3120 } 3121 if (streakon == 0 && write) { 3122 streakon = 1; 3123 pcrun[si].pcache_runstart = pgs[i]->offset; 3124 } 3125 3126 if (!write) 3127 pgs[i]->flags |= PG_RDONLY; 3128 } 3129 /* was the last page part of our streak? */ 3130 if (streakon) { 3131 pcrun[si].pcache_runend 3132 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 3133 si++; 3134 } 3135 if (!locked) 3136 mutex_exit(vp->v_uobj.vmobjlock); 3137 3138 KASSERT(si <= (npages / 2) + 1); 3139 3140 #ifdef notnowjohn 3141 /* send results to userspace */ 3142 if (write) 3143 puffs_cacheop(pmp, parkmem, pcinfo, 3144 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 3145 #endif 3146 3147 out: 3148 if (error) { 3149 if (pcinfo != NULL) 3150 kmem_free(pcinfo, 3151 sizeof(struct puffs_cacheinfo) + runsizes); 3152 #ifdef notnowjohn 3153 if (parkmem != NULL) 3154 puffs_park_release(parkmem, 1); 3155 #endif 3156 } 3157 3158 return error; 3159 } 3160 3161 /* 3162 * Extended attribute support. 3163 */ 3164 3165 int 3166 puffs_vnop_getextattr(void *v) 3167 { 3168 struct vop_getextattr_args /* 3169 struct vnode *a_vp; 3170 int a_attrnamespace; 3171 const char *a_name; 3172 struct uio *a_uio; 3173 size_t *a_size; 3174 kauth_cred_t a_cred; 3175 }; */ *ap = v; 3176 PUFFS_MSG_VARS(vn, getextattr); 3177 struct vnode *vp = ap->a_vp; 3178 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3179 int attrnamespace = ap->a_attrnamespace; 3180 const char *name = ap->a_name; 3181 struct uio *uio = ap->a_uio; 3182 size_t *sizep = ap->a_size; 3183 size_t tomove, resid; 3184 int error; 3185 3186 if (uio) 3187 resid = uio->uio_resid; 3188 else 3189 resid = 0; 3190 3191 tomove = PUFFS_TOMOVE(resid, pmp); 3192 if (tomove != resid) { 3193 error = E2BIG; 3194 goto out; 3195 } 3196 3197 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3198 &park_getextattr, (void *)&getextattr_msg, 1); 3199 3200 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3201 strlcpy(getextattr_msg->pvnr_attrname, name, 3202 sizeof(getextattr_msg->pvnr_attrname)); 3203 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3204 if (sizep) 3205 getextattr_msg->pvnr_datasize = 1; 3206 getextattr_msg->pvnr_resid = tomove; 3207 3208 puffs_msg_setinfo(park_getextattr, 3209 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3210 puffs_msg_setdelta(park_getextattr, tomove); 3211 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3212 3213 error = checkerr(pmp, error, __func__); 3214 if (error) 3215 goto out; 3216 3217 resid = getextattr_msg->pvnr_resid; 3218 if (resid > tomove) { 3219 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3220 "resid grew", VPTOPNC(vp)); 3221 error = EPROTO; 3222 goto out; 3223 } 3224 3225 if (sizep) 3226 *sizep = getextattr_msg->pvnr_datasize; 3227 if (uio) 3228 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3229 3230 out: 3231 PUFFS_MSG_RELEASE(getextattr); 3232 return error; 3233 } 3234 3235 int 3236 puffs_vnop_setextattr(void *v) 3237 { 3238 struct vop_setextattr_args /* { 3239 struct vnode *a_vp; 3240 int a_attrnamespace; 3241 const char *a_name; 3242 struct uio *a_uio; 3243 kauth_cred_t a_cred; 3244 }; */ *ap = v; 3245 PUFFS_MSG_VARS(vn, setextattr); 3246 struct vnode *vp = ap->a_vp; 3247 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3248 int attrnamespace = ap->a_attrnamespace; 3249 const char *name = ap->a_name; 3250 struct uio *uio = ap->a_uio; 3251 size_t tomove, resid; 3252 int error; 3253 3254 if (uio) 3255 resid = uio->uio_resid; 3256 else 3257 resid = 0; 3258 3259 tomove = PUFFS_TOMOVE(resid, pmp); 3260 if (tomove != resid) { 3261 error = E2BIG; 3262 goto out; 3263 } 3264 3265 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3266 &park_setextattr, (void *)&setextattr_msg, 1); 3267 3268 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3269 strlcpy(setextattr_msg->pvnr_attrname, name, 3270 sizeof(setextattr_msg->pvnr_attrname)); 3271 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3272 setextattr_msg->pvnr_resid = tomove; 3273 3274 if (uio) { 3275 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3276 if (error) 3277 goto out; 3278 } 3279 3280 puffs_msg_setinfo(park_setextattr, 3281 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3282 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3283 3284 error = checkerr(pmp, error, __func__); 3285 if (error) 3286 goto out; 3287 3288 if (setextattr_msg->pvnr_resid != 0) 3289 error = EIO; 3290 3291 out: 3292 PUFFS_MSG_RELEASE(setextattr); 3293 3294 return error; 3295 } 3296 3297 int 3298 puffs_vnop_listextattr(void *v) 3299 { 3300 struct vop_listextattr_args /* { 3301 struct vnode *a_vp; 3302 int a_attrnamespace; 3303 struct uio *a_uio; 3304 size_t *a_size; 3305 int a_flag, 3306 kauth_cred_t a_cred; 3307 }; */ *ap = v; 3308 PUFFS_MSG_VARS(vn, listextattr); 3309 struct vnode *vp = ap->a_vp; 3310 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3311 int attrnamespace = ap->a_attrnamespace; 3312 struct uio *uio = ap->a_uio; 3313 size_t *sizep = ap->a_size; 3314 int flag = ap->a_flag; 3315 size_t tomove, resid; 3316 int error; 3317 3318 if (uio) 3319 resid = uio->uio_resid; 3320 else 3321 resid = 0; 3322 3323 tomove = PUFFS_TOMOVE(resid, pmp); 3324 if (tomove != resid) { 3325 error = E2BIG; 3326 goto out; 3327 } 3328 3329 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3330 &park_listextattr, (void *)&listextattr_msg, 1); 3331 3332 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3333 listextattr_msg->pvnr_flag = flag; 3334 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3335 listextattr_msg->pvnr_resid = tomove; 3336 if (sizep) 3337 listextattr_msg->pvnr_datasize = 1; 3338 3339 puffs_msg_setinfo(park_listextattr, 3340 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3341 puffs_msg_setdelta(park_listextattr, tomove); 3342 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3343 3344 error = checkerr(pmp, error, __func__); 3345 if (error) 3346 goto out; 3347 3348 resid = listextattr_msg->pvnr_resid; 3349 if (resid > tomove) { 3350 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3351 "resid grew", VPTOPNC(vp)); 3352 error = EPROTO; 3353 goto out; 3354 } 3355 3356 if (sizep) 3357 *sizep = listextattr_msg->pvnr_datasize; 3358 if (uio) 3359 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3360 3361 out: 3362 PUFFS_MSG_RELEASE(listextattr); 3363 return error; 3364 } 3365 3366 int 3367 puffs_vnop_deleteextattr(void *v) 3368 { 3369 struct vop_deleteextattr_args /* { 3370 struct vnode *a_vp; 3371 int a_attrnamespace; 3372 const char *a_name; 3373 kauth_cred_t a_cred; 3374 }; */ *ap = v; 3375 PUFFS_MSG_VARS(vn, deleteextattr); 3376 struct vnode *vp = ap->a_vp; 3377 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3378 int attrnamespace = ap->a_attrnamespace; 3379 const char *name = ap->a_name; 3380 int error; 3381 3382 PUFFS_MSG_ALLOC(vn, deleteextattr); 3383 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3384 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3385 sizeof(deleteextattr_msg->pvnr_attrname)); 3386 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3387 3388 puffs_msg_setinfo(park_deleteextattr, 3389 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3390 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3391 vp->v_data, NULL, error); 3392 3393 error = checkerr(pmp, error, __func__); 3394 3395 PUFFS_MSG_RELEASE(deleteextattr); 3396 return error; 3397 } 3398 3399 /* 3400 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3401 * FAF update information for the puffs node first. 3402 */ 3403 int 3404 puffs_vnop_spec_read(void *v) 3405 { 3406 struct vop_read_args /* { 3407 const struct vnodeop_desc *a_desc; 3408 struct vnode *a_vp; 3409 struct uio *a_uio; 3410 int a_ioflag; 3411 kauth_cred_t a_cred; 3412 } */ *ap = v; 3413 3414 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3415 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3416 } 3417 3418 int 3419 puffs_vnop_spec_write(void *v) 3420 { 3421 struct vop_write_args /* { 3422 const struct vnodeop_desc *a_desc; 3423 struct vnode *a_vp; 3424 struct uio *a_uio; 3425 int a_ioflag; 3426 kauth_cred_t a_cred; 3427 } */ *ap = v; 3428 3429 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3430 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3431 } 3432 3433 int 3434 puffs_vnop_fifo_read(void *v) 3435 { 3436 struct vop_read_args /* { 3437 const struct vnodeop_desc *a_desc; 3438 struct vnode *a_vp; 3439 struct uio *a_uio; 3440 int a_ioflag; 3441 kauth_cred_t a_cred; 3442 } */ *ap = v; 3443 3444 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3445 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3446 } 3447 3448 int 3449 puffs_vnop_fifo_write(void *v) 3450 { 3451 struct vop_write_args /* { 3452 const struct vnodeop_desc *a_desc; 3453 struct vnode *a_vp; 3454 struct uio *a_uio; 3455 int a_ioflag; 3456 kauth_cred_t a_cred; 3457 } */ *ap = v; 3458 3459 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3460 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3461 } 3462
Indexes created Wed Oct 01 15:09:59 GMT 2025