puffs_vnops.c revision 1.165
1 /* $NetBSD: puffs_vnops.c,v 1.165 2012/04/08 15:04:41 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 1.165 2012/04/08 15:04:41 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_fcntl(void *); 77 int puffs_vnop_ioctl(void *); 78 int puffs_vnop_inactive(void *); 79 int puffs_vnop_print(void *); 80 int puffs_vnop_pathconf(void *); 81 int puffs_vnop_advlock(void *); 82 int puffs_vnop_strategy(void *); 83 int puffs_vnop_bmap(void *); 84 int puffs_vnop_mmap(void *); 85 int puffs_vnop_getpages(void *); 86 int puffs_vnop_abortop(void *); 87 int puffs_vnop_getextattr(void *); 88 int puffs_vnop_setextattr(void *); 89 int puffs_vnop_listextattr(void *); 90 int puffs_vnop_deleteextattr(void *); 91 92 int puffs_vnop_spec_read(void *); 93 int puffs_vnop_spec_write(void *); 94 int puffs_vnop_fifo_read(void *); 95 int puffs_vnop_fifo_write(void *); 96 97 int puffs_vnop_checkop(void *); 98 99 #define puffs_vnop_lock genfs_lock 100 #define puffs_vnop_unlock genfs_unlock 101 #define puffs_vnop_islocked genfs_islocked 102 103 int (**puffs_vnodeop_p)(void *); 104 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 107 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 108 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 109 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 110 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 111 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 112 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 113 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 114 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 115 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 116 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 117 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 118 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 119 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 120 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 121 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 122 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 123 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 124 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 125 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 126 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 127 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 128 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 129 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 130 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 131 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 132 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 133 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 134 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 135 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 136 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 137 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 138 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 139 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 140 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 141 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 142 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 143 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 144 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 145 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 146 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 147 #if 0 148 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 149 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 150 #endif 151 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 152 { NULL, NULL } 153 }; 154 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 155 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 156 157 158 int (**puffs_specop_p)(void *); 159 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 160 { &vop_default_desc, vn_default_error }, 161 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 162 { &vop_create_desc, spec_create }, /* genfs_badop */ 163 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 164 { &vop_open_desc, spec_open }, /* spec_open */ 165 { &vop_close_desc, spec_close }, /* spec_close */ 166 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 167 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 168 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 169 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 170 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 202 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 203 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 204 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 205 #if 0 206 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 207 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 220 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 221 { &vop_open_desc, vn_fifo_bypass }, /* open */ 222 { &vop_close_desc, vn_fifo_bypass }, /* close */ 223 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 228 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 229 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 230 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 231 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 232 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 233 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 234 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 235 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 236 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 237 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 238 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 239 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 241 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 246 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 247 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 248 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 249 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 250 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 252 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 253 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 254 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 257 #if 0 258 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 259 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 260 #endif 261 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 262 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 263 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 264 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 265 { NULL, NULL } 266 }; 267 const struct vnodeopv_desc puffs_fifoop_opv_desc = 268 { &puffs_fifoop_p, puffs_fifoop_entries }; 269 270 271 /* "real" vnode operations */ 272 int (**puffs_msgop_p)(void *); 273 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 274 { &vop_default_desc, vn_default_error }, 275 { &vop_create_desc, puffs_vnop_create }, /* create */ 276 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 277 { &vop_open_desc, puffs_vnop_open }, /* open */ 278 { &vop_close_desc, puffs_vnop_close }, /* close */ 279 { &vop_access_desc, puffs_vnop_access }, /* access */ 280 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 281 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 282 { &vop_read_desc, puffs_vnop_read }, /* read */ 283 { &vop_write_desc, puffs_vnop_write }, /* write */ 284 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 285 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 286 { &vop_link_desc, puffs_vnop_link }, /* link */ 287 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 288 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 289 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 290 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 291 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 292 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 293 { &vop_print_desc, puffs_vnop_print }, /* print */ 294 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 295 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 296 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 297 { NULL, NULL } 298 }; 299 const struct vnodeopv_desc puffs_msgop_opv_desc = 300 { &puffs_msgop_p, puffs_msgop_entries }; 301 302 303 #define ERROUT(err) \ 304 do { \ 305 error = err; \ 306 goto out; \ 307 } while (/*CONSTCOND*/0) 308 309 /* 310 * This is a generic vnode operation handler. It checks if the necessary 311 * operations for the called vnode operation are implemented by userspace 312 * and either returns a dummy return value or proceeds to call the real 313 * vnode operation from puffs_msgop_v. 314 * 315 * XXX: this should described elsewhere and autogenerated, the complexity 316 * of the vnode operations vectors and their interrelationships is also 317 * getting a bit out of hand. Another problem is that we need this same 318 * information in the fs server code, so keeping the two in sync manually 319 * is not a viable (long term) plan. 320 */ 321 322 /* not supported, handle locking protocol */ 323 #define CHECKOP_NOTSUPP(op) \ 324 case VOP_##op##_DESCOFFSET: \ 325 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 326 return genfs_eopnotsupp(v); \ 327 break 328 329 /* always succeed, no locking */ 330 #define CHECKOP_SUCCESS(op) \ 331 case VOP_##op##_DESCOFFSET: \ 332 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 333 return 0; \ 334 break 335 336 int 337 puffs_vnop_checkop(void *v) 338 { 339 struct vop_generic_args /* { 340 struct vnodeop_desc *a_desc; 341 spooky mystery contents; 342 } */ *ap = v; 343 struct vnodeop_desc *desc = ap->a_desc; 344 struct puffs_mount *pmp; 345 struct vnode *vp; 346 int offset, rv; 347 348 offset = ap->a_desc->vdesc_vp_offsets[0]; 349 #ifdef DIAGNOSTIC 350 if (offset == VDESC_NO_OFFSET) 351 panic("puffs_checkop: no vnode, why did you call me?"); 352 #endif 353 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 354 pmp = MPTOPUFFSMP(vp->v_mount); 355 356 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 357 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 358 359 if (!ALLOPS(pmp)) { 360 switch (desc->vdesc_offset) { 361 CHECKOP_NOTSUPP(CREATE); 362 CHECKOP_NOTSUPP(MKNOD); 363 CHECKOP_NOTSUPP(GETATTR); 364 CHECKOP_NOTSUPP(SETATTR); 365 CHECKOP_NOTSUPP(READ); 366 CHECKOP_NOTSUPP(WRITE); 367 CHECKOP_NOTSUPP(FCNTL); 368 CHECKOP_NOTSUPP(IOCTL); 369 CHECKOP_NOTSUPP(REMOVE); 370 CHECKOP_NOTSUPP(LINK); 371 CHECKOP_NOTSUPP(RENAME); 372 CHECKOP_NOTSUPP(MKDIR); 373 CHECKOP_NOTSUPP(RMDIR); 374 CHECKOP_NOTSUPP(SYMLINK); 375 CHECKOP_NOTSUPP(READDIR); 376 CHECKOP_NOTSUPP(READLINK); 377 CHECKOP_NOTSUPP(PRINT); 378 CHECKOP_NOTSUPP(PATHCONF); 379 CHECKOP_NOTSUPP(GETEXTATTR); 380 CHECKOP_NOTSUPP(SETEXTATTR); 381 CHECKOP_NOTSUPP(LISTEXTATTR); 382 CHECKOP_NOTSUPP(DELETEEXTATTR); 383 384 CHECKOP_SUCCESS(ACCESS); 385 CHECKOP_SUCCESS(CLOSE); 386 CHECKOP_SUCCESS(SEEK); 387 388 case VOP_GETPAGES_DESCOFFSET: 389 if (!EXISTSOP(pmp, READ)) 390 return genfs_eopnotsupp(v); 391 break; 392 393 default: 394 panic("puffs_checkop: unhandled vnop %d", 395 desc->vdesc_offset); 396 } 397 } 398 399 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 400 401 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 402 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 403 404 return rv; 405 } 406 407 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 408 struct componentname *); 409 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 410 struct componentname *); 411 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 412 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 413 static int flushvncache(struct vnode *, off_t, off_t, bool); 414 static void update_va(struct vnode *, struct vattr *, struct vattr *, 415 struct timespec *, struct timespec *); 416 417 418 #define PUFFS_ABORT_LOOKUP 1 419 #define PUFFS_ABORT_CREATE 2 420 #define PUFFS_ABORT_MKNOD 3 421 #define PUFFS_ABORT_MKDIR 4 422 #define PUFFS_ABORT_SYMLINK 5 423 424 /* 425 * Press the pani^Wabort button! Kernel resource allocation failed. 426 */ 427 static void 428 puffs_abortbutton(struct puffs_mount *pmp, int what, 429 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 430 { 431 432 switch (what) { 433 case PUFFS_ABORT_CREATE: 434 case PUFFS_ABORT_MKNOD: 435 case PUFFS_ABORT_SYMLINK: 436 callremove(pmp, dck, ck, cnp); 437 break; 438 case PUFFS_ABORT_MKDIR: 439 callrmdir(pmp, dck, ck, cnp); 440 break; 441 } 442 443 callinactive(pmp, ck, 0); 444 callreclaim(pmp, ck); 445 } 446 447 /* 448 * Begin vnode operations. 449 * 450 * A word from the keymaster about locks: generally we don't want 451 * to use the vnode locks at all: it creates an ugly dependency between 452 * the userlandia file server and the kernel. But we'll play along with 453 * the kernel vnode locks for now. However, even currently we attempt 454 * to release locks as early as possible. This is possible for some 455 * operations which a) don't need a locked vnode after the userspace op 456 * and b) return with the vnode unlocked. Theoretically we could 457 * unlock-do op-lock for others and order the graph in userspace, but I 458 * don't want to think of the consequences for the time being. 459 */ 460 461 #define TTL_TO_TIMEOUT(ts) \ 462 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 463 int 464 puffs_vnop_lookup(void *v) 465 { 466 struct vop_lookup_args /* { 467 const struct vnodeop_desc *a_desc; 468 struct vnode *a_dvp; 469 struct vnode **a_vpp; 470 struct componentname *a_cnp; 471 } */ *ap = v; 472 PUFFS_MSG_VARS(vn, lookup); 473 struct puffs_mount *pmp; 474 struct componentname *cnp; 475 struct vnode *vp, *dvp, *cvp; 476 struct puffs_node *dpn, *cpn; 477 int isdot; 478 int error; 479 480 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 481 cnp = ap->a_cnp; 482 dvp = ap->a_dvp; 483 cvp = NULL; 484 cpn = NULL; 485 *ap->a_vpp = NULL; 486 487 /* r/o fs? we check create later to handle EEXIST */ 488 if ((cnp->cn_flags & ISLASTCN) 489 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 490 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 491 return EROFS; 492 493 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 494 495 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 496 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 497 498 /* 499 * Check if someone fed it into the cache 500 */ 501 if (PUFFS_USE_NAMECACHE(pmp)) { 502 error = cache_lookup(dvp, ap->a_vpp, cnp); 503 504 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 505 506 cvp = *ap->a_vpp; 507 cpn = VPTOPP(cvp); 508 if (hardclock_ticks > cpn->pn_cn_timeout) { 509 cache_purge1(cvp, NULL, PURGE_CHILDREN); 510 511 /* 512 * cached vnode (cvp) is still locked 513 * so that we can reuse it upon a new 514 * successful lookup. 515 */ 516 *ap->a_vpp = NULL; 517 error = -1; 518 } 519 } 520 521 /* 522 * Do not use negative caching, since the filesystem 523 * provides no TTL for it. 524 */ 525 if ((error == ENOENT) && PUFFS_USE_FS_TTL(pmp)) 526 error = -1; 527 528 if (error >= 0) 529 return error; 530 } 531 532 if (isdot) { 533 /* deal with rename lookup semantics */ 534 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 535 return EISDIR; 536 537 if (cvp != NULL) 538 vput(cvp); 539 540 vp = ap->a_dvp; 541 vref(vp); 542 *ap->a_vpp = vp; 543 return 0; 544 } 545 546 if (cvp != NULL) 547 mutex_enter(&cpn->pn_sizemtx); 548 549 PUFFS_MSG_ALLOC(vn, lookup); 550 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 551 cnp, PUFFS_USE_FULLPNBUF(pmp)); 552 553 if (cnp->cn_flags & ISDOTDOT) 554 VOP_UNLOCK(dvp); 555 556 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 557 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 558 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 559 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 560 561 /* 562 * In case of error, there is no new vnode to play with, so be 563 * happy with the NULL value given to vpp in the beginning. 564 * Also, check if this really was an error or the target was not 565 * present. Either treat it as a non-error for CREATE/RENAME or 566 * enter the component into the negative name cache (if desired). 567 */ 568 if (error) { 569 error = checkerr(pmp, error, __func__); 570 if (error == ENOENT) { 571 /* don't allow to create files on r/o fs */ 572 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 573 && cnp->cn_nameiop == CREATE) { 574 error = EROFS; 575 576 /* adjust values if we are creating */ 577 } else if ((cnp->cn_flags & ISLASTCN) 578 && (cnp->cn_nameiop == CREATE 579 || cnp->cn_nameiop == RENAME)) { 580 error = EJUSTRETURN; 581 582 /* save negative cache entry */ 583 } else { 584 if ((cnp->cn_flags & MAKEENTRY) 585 && PUFFS_USE_NAMECACHE(pmp) 586 && !PUFFS_USE_FS_TTL(pmp)) 587 cache_enter(dvp, NULL, cnp); 588 } 589 } 590 goto out; 591 } 592 593 /* 594 * Check that we don't get our parent node back, that would cause 595 * a pretty obvious deadlock. 596 */ 597 dpn = dvp->v_data; 598 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 599 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 600 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 601 error = EPROTO; 602 goto out; 603 } 604 605 /* 606 * On successfull relookup, do not create a new node. 607 */ 608 if (cvp != NULL) { 609 vp = cvp; 610 } else { 611 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 612 1, 1, &vp); 613 614 if (error == PUFFS_NOSUCHCOOKIE) { 615 error = puffs_getvnode(dvp->v_mount, 616 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 617 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 618 if (error) { 619 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 620 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 621 ap->a_cnp); 622 goto out; 623 } 624 625 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 626 } else if (error) { 627 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 628 lookup_msg->pvnr_newnode, ap->a_cnp); 629 goto out; 630 } 631 } 632 633 /* 634 * Update cache and TTL 635 */ 636 if (PUFFS_USE_FS_TTL(pmp)) { 637 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 638 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 639 update_va(vp, NULL, &lookup_msg->pvnr_va, va_ttl, cn_ttl); 640 } 641 642 *ap->a_vpp = vp; 643 644 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 645 cache_enter(dvp, vp, cnp); 646 647 /* XXX */ 648 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 649 cnp->cn_flags &= ~REQUIREDIR; 650 if (lookup_msg->pvnr_cn.pkcn_consume) 651 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 652 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 653 654 out: 655 if (cvp != NULL) { 656 mutex_exit(&cpn->pn_sizemtx); 657 /* 658 * We had a cached vnode but new lookup failed, 659 * unlock it and let it die now. 660 */ 661 if (error != 0) 662 vput(cvp); 663 } 664 665 if (cnp->cn_flags & ISDOTDOT) 666 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 667 668 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 669 PUFFS_MSG_RELEASE(lookup); 670 return error; 671 } 672 673 #define REFPN_AND_UNLOCKVP(a, b) \ 674 do { \ 675 mutex_enter(&b->pn_mtx); \ 676 puffs_referencenode(b); \ 677 mutex_exit(&b->pn_mtx); \ 678 VOP_UNLOCK(a); \ 679 } while (/*CONSTCOND*/0) 680 681 #define REFPN(b) \ 682 do { \ 683 mutex_enter(&b->pn_mtx); \ 684 puffs_referencenode(b); \ 685 mutex_exit(&b->pn_mtx); \ 686 } while (/*CONSTCOND*/0) 687 688 #define RELEPN_AND_VP(a, b) \ 689 do { \ 690 puffs_releasenode(b); \ 691 vrele(a); \ 692 } while (/*CONSTCOND*/0) 693 694 int 695 puffs_vnop_create(void *v) 696 { 697 struct vop_create_args /* { 698 const struct vnodeop_desc *a_desc; 699 struct vnode *a_dvp; 700 struct vnode **a_vpp; 701 struct componentname *a_cnp; 702 struct vattr *a_vap; 703 } */ *ap = v; 704 PUFFS_MSG_VARS(vn, create); 705 struct vnode *dvp = ap->a_dvp; 706 struct puffs_node *dpn = VPTOPP(dvp); 707 struct componentname *cnp = ap->a_cnp; 708 struct mount *mp = dvp->v_mount; 709 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 710 int error; 711 712 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 713 dvp, ap->a_cnp->cn_nameptr)); 714 715 PUFFS_MSG_ALLOC(vn, create); 716 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 717 cnp, PUFFS_USE_FULLPNBUF(pmp)); 718 create_msg->pvnr_va = *ap->a_vap; 719 puffs_msg_setinfo(park_create, PUFFSOP_VN, 720 PUFFS_VN_CREATE, VPTOPNC(dvp)); 721 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 722 723 error = checkerr(pmp, error, __func__); 724 if (error) 725 goto out; 726 727 error = puffs_newnode(mp, dvp, ap->a_vpp, 728 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 729 if (error) { 730 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 731 create_msg->pvnr_newnode, cnp); 732 goto out; 733 } 734 735 if (PUFFS_USE_FS_TTL(pmp)) { 736 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 737 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 738 struct vattr *rvap = &create_msg->pvnr_va; 739 740 update_va(*ap->a_vpp, NULL, rvap, va_ttl, cn_ttl); 741 } 742 743 out: 744 vput(dvp); 745 746 DPRINTF(("puffs_create: return %d\n", error)); 747 PUFFS_MSG_RELEASE(create); 748 return error; 749 } 750 751 int 752 puffs_vnop_mknod(void *v) 753 { 754 struct vop_mknod_args /* { 755 const struct vnodeop_desc *a_desc; 756 struct vnode *a_dvp; 757 struct vnode **a_vpp; 758 struct componentname *a_cnp; 759 struct vattr *a_vap; 760 } */ *ap = v; 761 PUFFS_MSG_VARS(vn, mknod); 762 struct vnode *dvp = ap->a_dvp; 763 struct puffs_node *dpn = VPTOPP(dvp); 764 struct componentname *cnp = ap->a_cnp; 765 struct mount *mp = dvp->v_mount; 766 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 767 int error; 768 769 PUFFS_MSG_ALLOC(vn, mknod); 770 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 771 cnp, PUFFS_USE_FULLPNBUF(pmp)); 772 mknod_msg->pvnr_va = *ap->a_vap; 773 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 774 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 775 776 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 777 778 error = checkerr(pmp, error, __func__); 779 if (error) 780 goto out; 781 782 error = puffs_newnode(mp, dvp, ap->a_vpp, 783 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 784 ap->a_vap->va_rdev); 785 if (error) { 786 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 787 mknod_msg->pvnr_newnode, cnp); 788 goto out; 789 } 790 791 if (PUFFS_USE_FS_TTL(pmp)) { 792 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 793 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 794 struct vattr *rvap = &mknod_msg->pvnr_va; 795 796 update_va(*ap->a_vpp, NULL, rvap, va_ttl, cn_ttl); 797 } 798 799 out: 800 vput(dvp); 801 PUFFS_MSG_RELEASE(mknod); 802 return error; 803 } 804 805 int 806 puffs_vnop_open(void *v) 807 { 808 struct vop_open_args /* { 809 const struct vnodeop_desc *a_desc; 810 struct vnode *a_vp; 811 int a_mode; 812 kauth_cred_t a_cred; 813 } */ *ap = v; 814 PUFFS_MSG_VARS(vn, open); 815 struct vnode *vp = ap->a_vp; 816 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 817 int mode = ap->a_mode; 818 int error; 819 820 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 821 822 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 823 ERROUT(EROFS); 824 825 if (!EXISTSOP(pmp, OPEN)) 826 ERROUT(0); 827 828 PUFFS_MSG_ALLOC(vn, open); 829 open_msg->pvnr_mode = mode; 830 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 831 puffs_msg_setinfo(park_open, PUFFSOP_VN, 832 PUFFS_VN_OPEN, VPTOPNC(vp)); 833 834 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 835 error = checkerr(pmp, error, __func__); 836 837 out: 838 DPRINTF(("puffs_open: returning %d\n", error)); 839 PUFFS_MSG_RELEASE(open); 840 return error; 841 } 842 843 int 844 puffs_vnop_close(void *v) 845 { 846 struct vop_close_args /* { 847 const struct vnodeop_desc *a_desc; 848 struct vnode *a_vp; 849 int a_fflag; 850 kauth_cred_t a_cred; 851 } */ *ap = v; 852 PUFFS_MSG_VARS(vn, close); 853 struct vnode *vp = ap->a_vp; 854 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 855 856 PUFFS_MSG_ALLOC(vn, close); 857 puffs_msg_setfaf(park_close); 858 close_msg->pvnr_fflag = ap->a_fflag; 859 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 860 puffs_msg_setinfo(park_close, PUFFSOP_VN, 861 PUFFS_VN_CLOSE, VPTOPNC(vp)); 862 863 puffs_msg_enqueue(pmp, park_close); 864 PUFFS_MSG_RELEASE(close); 865 return 0; 866 } 867 868 int 869 puffs_vnop_access(void *v) 870 { 871 struct vop_access_args /* { 872 const struct vnodeop_desc *a_desc; 873 struct vnode *a_vp; 874 int a_mode; 875 kauth_cred_t a_cred; 876 } */ *ap = v; 877 PUFFS_MSG_VARS(vn, access); 878 struct vnode *vp = ap->a_vp; 879 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 880 int mode = ap->a_mode; 881 int error; 882 883 if (mode & VWRITE) { 884 switch (vp->v_type) { 885 case VDIR: 886 case VLNK: 887 case VREG: 888 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 889 || !EXISTSOP(pmp, WRITE)) 890 return EROFS; 891 break; 892 default: 893 break; 894 } 895 } 896 897 if (!EXISTSOP(pmp, ACCESS)) 898 return 0; 899 900 PUFFS_MSG_ALLOC(vn, access); 901 access_msg->pvnr_mode = ap->a_mode; 902 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 903 puffs_msg_setinfo(park_access, PUFFSOP_VN, 904 PUFFS_VN_ACCESS, VPTOPNC(vp)); 905 906 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 907 error = checkerr(pmp, error, __func__); 908 PUFFS_MSG_RELEASE(access); 909 910 return error; 911 } 912 913 static void 914 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 915 struct timespec *va_ttl, struct timespec *cn_ttl) 916 { 917 struct puffs_node *pn = VPTOPP(vp); 918 919 if (cn_ttl != NULL) 920 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 921 922 /* 923 * Don't listen to the file server regarding special device 924 * size info, the file server doesn't know anything about them. 925 */ 926 if (vp->v_type == VBLK || vp->v_type == VCHR) 927 rvap->va_size = vp->v_size; 928 929 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 930 if (vp->v_type == VBLK) 931 rvap->va_blocksize = BLKDEV_IOSIZE; 932 else if (vp->v_type == VCHR) 933 rvap->va_blocksize = MAXBSIZE; 934 935 if (vap != NULL) { 936 (void) memcpy(vap, rvap, sizeof(struct vattr)); 937 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 938 939 if (pn->pn_stat & PNODE_METACACHE_ATIME) 940 vap->va_atime = pn->pn_mc_atime; 941 if (pn->pn_stat & PNODE_METACACHE_CTIME) 942 vap->va_ctime = pn->pn_mc_ctime; 943 if (pn->pn_stat & PNODE_METACACHE_MTIME) 944 vap->va_mtime = pn->pn_mc_mtime; 945 if (pn->pn_stat & PNODE_METACACHE_SIZE) 946 vap->va_size = pn->pn_mc_size; 947 } 948 949 if (!(pn->pn_stat & PNODE_METACACHE_SIZE)) { 950 if (rvap->va_size != VNOVAL 951 && vp->v_type != VBLK && vp->v_type != VCHR) { 952 uvm_vnp_setsize(vp, rvap->va_size); 953 pn->pn_serversize = rvap->va_size; 954 } 955 } 956 957 if (va_ttl != NULL) { 958 if (pn->pn_va_cache == NULL) 959 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 960 961 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 962 963 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 964 } 965 } 966 967 int 968 puffs_vnop_getattr(void *v) 969 { 970 struct vop_getattr_args /* { 971 const struct vnodeop_desc *a_desc; 972 struct vnode *a_vp; 973 struct vattr *a_vap; 974 kauth_cred_t a_cred; 975 } */ *ap = v; 976 PUFFS_MSG_VARS(vn, getattr); 977 struct vnode *vp = ap->a_vp; 978 struct mount *mp = vp->v_mount; 979 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 980 struct vattr *vap, *rvap; 981 struct puffs_node *pn = VPTOPP(vp); 982 struct timespec *va_ttl = NULL; 983 int error = 0; 984 985 /* 986 * A lock is required so that we do not race with 987 * setattr, write and fsync when changing vp->v_size. 988 * This is critical, since setting a stall smaler value 989 * triggers a file truncate in uvm_vnp_setsize(), which 990 * most of the time means data corruption (a chunk of 991 * data is replaced by zeroes). This can be removed if 992 * we decide one day that VOP_GETATTR must operate on 993 * a locked vnode. 994 * 995 * XXX Should be useless now that VOP_GETATTR has been 996 * fixed to always require a shared lock at least. 997 */ 998 mutex_enter(&pn->pn_sizemtx); 999 1000 REFPN(pn); 1001 vap = ap->a_vap; 1002 1003 if (PUFFS_USE_FS_TTL(pmp)) { 1004 if (hardclock_ticks < pn->pn_va_timeout) { 1005 update_va(vp, vap, pn->pn_va_cache, NULL, NULL); 1006 goto out2; 1007 } 1008 } 1009 1010 PUFFS_MSG_ALLOC(vn, getattr); 1011 vattr_null(&getattr_msg->pvnr_va); 1012 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1013 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1014 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1015 1016 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1017 error = checkerr(pmp, error, __func__); 1018 if (error) 1019 goto out; 1020 1021 rvap = &getattr_msg->pvnr_va; 1022 1023 if (PUFFS_USE_FS_TTL(pmp)) 1024 va_ttl = &getattr_msg->pvnr_va_ttl; 1025 1026 update_va(vp, vap, rvap, va_ttl, NULL); 1027 1028 out: 1029 PUFFS_MSG_RELEASE(getattr); 1030 1031 out2: 1032 puffs_releasenode(pn); 1033 1034 mutex_exit(&pn->pn_sizemtx); 1035 1036 return error; 1037 } 1038 1039 #define SETATTR_CHSIZE 0x01 1040 #define SETATTR_ASYNC 0x02 1041 static int 1042 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1043 { 1044 PUFFS_MSG_VARS(vn, setattr); 1045 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1046 struct puffs_node *pn = vp->v_data; 1047 int error = 0; 1048 1049 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1050 1051 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1052 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1053 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1054 || vap->va_mode != (mode_t)VNOVAL)) 1055 return EROFS; 1056 1057 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1058 && vp->v_type == VREG && vap->va_size != VNOVAL) 1059 return EROFS; 1060 1061 /* 1062 * Flush metacache first. If we are called with some explicit 1063 * parameters, treat them as information overriding metacache 1064 * information. 1065 */ 1066 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1067 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1068 && vap->va_atime.tv_sec == VNOVAL) 1069 vap->va_atime = pn->pn_mc_atime; 1070 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1071 && vap->va_ctime.tv_sec == VNOVAL) 1072 vap->va_ctime = pn->pn_mc_ctime; 1073 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1074 && vap->va_mtime.tv_sec == VNOVAL) 1075 vap->va_mtime = pn->pn_mc_mtime; 1076 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1077 && vap->va_size == VNOVAL) 1078 vap->va_size = pn->pn_mc_size; 1079 1080 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1081 } 1082 1083 /* 1084 * Flush attribute cache so that another thread do 1085 * not get a stale value during the operation. 1086 */ 1087 if (PUFFS_USE_FS_TTL(pmp)) 1088 pn->pn_va_timeout = 0; 1089 1090 PUFFS_MSG_ALLOC(vn, setattr); 1091 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1092 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1093 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1094 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1095 if (flags & SETATTR_ASYNC) 1096 puffs_msg_setfaf(park_setattr); 1097 1098 puffs_msg_enqueue(pmp, park_setattr); 1099 if ((flags & SETATTR_ASYNC) == 0) 1100 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1101 1102 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1103 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1104 struct vattr *rvap = &setattr_msg->pvnr_va; 1105 1106 update_va(vp, NULL, rvap, va_ttl, NULL); 1107 } 1108 1109 PUFFS_MSG_RELEASE(setattr); 1110 if ((flags & SETATTR_ASYNC) == 0) { 1111 error = checkerr(pmp, error, __func__); 1112 if (error) 1113 return error; 1114 } else { 1115 error = 0; 1116 } 1117 1118 if (vap->va_size != VNOVAL) { 1119 pn->pn_serversize = vap->va_size; 1120 if (flags & SETATTR_CHSIZE) 1121 uvm_vnp_setsize(vp, vap->va_size); 1122 } 1123 1124 return 0; 1125 } 1126 1127 int 1128 puffs_vnop_setattr(void *v) 1129 { 1130 struct vop_getattr_args /* { 1131 const struct vnodeop_desc *a_desc; 1132 struct vnode *a_vp; 1133 struct vattr *a_vap; 1134 kauth_cred_t a_cred; 1135 } */ *ap = v; 1136 struct puffs_node *pn = ap->a_vp->v_data; 1137 int error; 1138 1139 mutex_enter(&pn->pn_sizemtx); 1140 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1141 mutex_exit(&pn->pn_sizemtx); 1142 1143 return error; 1144 } 1145 1146 static __inline int 1147 doinact(struct puffs_mount *pmp, int iaflag) 1148 { 1149 1150 if (EXISTSOP(pmp, INACTIVE)) 1151 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1152 if (iaflag || ALLOPS(pmp)) 1153 return 1; 1154 else 1155 return 0; 1156 else 1157 return 1; 1158 else 1159 return 0; 1160 } 1161 1162 static void 1163 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1164 { 1165 int error; 1166 PUFFS_MSG_VARS(vn, inactive); 1167 1168 if (doinact(pmp, iaflag)) { 1169 PUFFS_MSG_ALLOC(vn, inactive); 1170 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1171 PUFFS_VN_INACTIVE, ck); 1172 1173 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1174 PUFFS_MSG_RELEASE(inactive); 1175 } 1176 } 1177 1178 /* XXX: callinactive can't setback */ 1179 int 1180 puffs_vnop_inactive(void *v) 1181 { 1182 struct vop_inactive_args /* { 1183 const struct vnodeop_desc *a_desc; 1184 struct vnode *a_vp; 1185 } */ *ap = v; 1186 PUFFS_MSG_VARS(vn, inactive); 1187 struct vnode *vp = ap->a_vp; 1188 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1189 struct puffs_node *pnode; 1190 int error; 1191 1192 pnode = vp->v_data; 1193 mutex_enter(&pnode->pn_sizemtx); 1194 1195 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1196 flushvncache(vp, 0, 0, false); 1197 PUFFS_MSG_ALLOC(vn, inactive); 1198 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1199 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1200 1201 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1202 NULL, error); 1203 PUFFS_MSG_RELEASE(inactive); 1204 } 1205 pnode->pn_stat &= ~PNODE_DOINACT; 1206 1207 /* 1208 * file server thinks it's gone? then don't be afraid care, 1209 * node's life was already all it would ever be 1210 */ 1211 if (pnode->pn_stat & PNODE_NOREFS) { 1212 pnode->pn_stat |= PNODE_DYING; 1213 *ap->a_recycle = true; 1214 } 1215 1216 mutex_exit(&pnode->pn_sizemtx); 1217 VOP_UNLOCK(vp); 1218 1219 return 0; 1220 } 1221 1222 static void 1223 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1224 { 1225 PUFFS_MSG_VARS(vn, reclaim); 1226 1227 if (!EXISTSOP(pmp, RECLAIM)) 1228 return; 1229 1230 PUFFS_MSG_ALLOC(vn, reclaim); 1231 puffs_msg_setfaf(park_reclaim); 1232 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1233 1234 puffs_msg_enqueue(pmp, park_reclaim); 1235 PUFFS_MSG_RELEASE(reclaim); 1236 } 1237 1238 /* 1239 * always FAF, we don't really care if the server wants to fail to 1240 * reclaim the node or not 1241 */ 1242 int 1243 puffs_vnop_reclaim(void *v) 1244 { 1245 struct vop_reclaim_args /* { 1246 const struct vnodeop_desc *a_desc; 1247 struct vnode *a_vp; 1248 } */ *ap = v; 1249 struct vnode *vp = ap->a_vp; 1250 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1251 struct puffs_node *pnode = vp->v_data; 1252 bool notifyserver = true; 1253 1254 /* 1255 * first things first: check if someone is trying to reclaim the 1256 * root vnode. do not allow that to travel to userspace. 1257 * Note that we don't need to take the lock similarly to 1258 * puffs_root(), since there is only one of us. 1259 */ 1260 if (vp->v_vflag & VV_ROOT) { 1261 mutex_enter(&pmp->pmp_lock); 1262 KASSERT(pmp->pmp_root != NULL); 1263 pmp->pmp_root = NULL; 1264 mutex_exit(&pmp->pmp_lock); 1265 notifyserver = false; 1266 } 1267 1268 /* 1269 * purge info from kernel before issueing FAF, since we 1270 * don't really know when we'll get around to it after 1271 * that and someone might race us into node creation 1272 */ 1273 mutex_enter(&pmp->pmp_lock); 1274 LIST_REMOVE(pnode, pn_hashent); 1275 mutex_exit(&pmp->pmp_lock); 1276 1277 if (notifyserver) 1278 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1279 1280 puffs_putvnode(vp); 1281 vp->v_data = NULL; 1282 1283 return 0; 1284 } 1285 1286 #define CSIZE sizeof(**ap->a_cookies) 1287 int 1288 puffs_vnop_readdir(void *v) 1289 { 1290 struct vop_readdir_args /* { 1291 const struct vnodeop_desc *a_desc; 1292 struct vnode *a_vp; 1293 struct uio *a_uio; 1294 kauth_cred_t a_cred; 1295 int *a_eofflag; 1296 off_t **a_cookies; 1297 int *a_ncookies; 1298 } */ *ap = v; 1299 PUFFS_MSG_VARS(vn, readdir); 1300 struct vnode *vp = ap->a_vp; 1301 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1302 size_t argsize, tomove, cookiemem, cookiesmax; 1303 struct uio *uio = ap->a_uio; 1304 size_t howmuch, resid; 1305 int error; 1306 1307 /* 1308 * ok, so we need: resid + cookiemem = maxreq 1309 * => resid + cookiesize * (resid/minsize) = maxreq 1310 * => resid + cookiesize/minsize * resid = maxreq 1311 * => (cookiesize/minsize + 1) * resid = maxreq 1312 * => resid = maxreq / (cookiesize/minsize + 1) 1313 * 1314 * Since cookiesize <= minsize and we're not very big on floats, 1315 * we approximate that to be 1. Therefore: 1316 * 1317 * resid = maxreq / 2; 1318 * 1319 * Well, at least we didn't have to use differential equations 1320 * or the Gram-Schmidt process. 1321 * 1322 * (yes, I'm very afraid of this) 1323 */ 1324 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1325 1326 if (ap->a_cookies) { 1327 KASSERT(ap->a_ncookies != NULL); 1328 if (pmp->pmp_args.pa_fhsize == 0) 1329 return EOPNOTSUPP; 1330 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1331 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1332 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1333 } else { 1334 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1335 cookiesmax = 0; 1336 cookiemem = 0; 1337 } 1338 1339 argsize = sizeof(struct puffs_vnmsg_readdir); 1340 tomove = resid + cookiemem; 1341 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1342 (void *)&readdir_msg, 1); 1343 1344 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1345 readdir_msg->pvnr_offset = uio->uio_offset; 1346 readdir_msg->pvnr_resid = resid; 1347 readdir_msg->pvnr_ncookies = cookiesmax; 1348 readdir_msg->pvnr_eofflag = 0; 1349 readdir_msg->pvnr_dentoff = cookiemem; 1350 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1351 PUFFS_VN_READDIR, VPTOPNC(vp)); 1352 puffs_msg_setdelta(park_readdir, tomove); 1353 1354 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1355 error = checkerr(pmp, error, __func__); 1356 if (error) 1357 goto out; 1358 1359 /* userspace is cheating? */ 1360 if (readdir_msg->pvnr_resid > resid) { 1361 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1362 "resid grew", VPTOPNC(vp)); 1363 ERROUT(EPROTO); 1364 } 1365 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1366 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1367 "too many cookies", VPTOPNC(vp)); 1368 ERROUT(EPROTO); 1369 } 1370 1371 /* check eof */ 1372 if (readdir_msg->pvnr_eofflag) 1373 *ap->a_eofflag = 1; 1374 1375 /* bouncy-wouncy with the directory data */ 1376 howmuch = resid - readdir_msg->pvnr_resid; 1377 1378 /* force eof if no data was returned (getcwd() needs this) */ 1379 if (howmuch == 0) { 1380 *ap->a_eofflag = 1; 1381 goto out; 1382 } 1383 1384 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1385 if (error) 1386 goto out; 1387 1388 /* provide cookies to caller if so desired */ 1389 if (ap->a_cookies) { 1390 KASSERT(curlwp != uvm.pagedaemon_lwp); 1391 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1392 M_TEMP, M_WAITOK); 1393 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1394 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1395 *ap->a_ncookies*CSIZE); 1396 } 1397 1398 /* next readdir starts here */ 1399 uio->uio_offset = readdir_msg->pvnr_offset; 1400 1401 out: 1402 puffs_msgmem_release(park_readdir); 1403 return error; 1404 } 1405 #undef CSIZE 1406 1407 /* 1408 * poll works by consuming the bitmask in pn_revents. If there are 1409 * events available, poll returns immediately. If not, it issues a 1410 * poll to userspace, selrecords itself and returns with no available 1411 * events. When the file server returns, it executes puffs_parkdone_poll(), 1412 * where available events are added to the bitmask. selnotify() is 1413 * then also executed by that function causing us to enter here again 1414 * and hopefully find the missing bits (unless someone got them first, 1415 * in which case it starts all over again). 1416 */ 1417 int 1418 puffs_vnop_poll(void *v) 1419 { 1420 struct vop_poll_args /* { 1421 const struct vnodeop_desc *a_desc; 1422 struct vnode *a_vp; 1423 int a_events; 1424 } */ *ap = v; 1425 PUFFS_MSG_VARS(vn, poll); 1426 struct vnode *vp = ap->a_vp; 1427 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1428 struct puffs_node *pn = vp->v_data; 1429 int events, error; 1430 1431 if (EXISTSOP(pmp, POLL)) { 1432 mutex_enter(&pn->pn_mtx); 1433 events = pn->pn_revents & ap->a_events; 1434 if (events & ap->a_events) { 1435 pn->pn_revents &= ~ap->a_events; 1436 mutex_exit(&pn->pn_mtx); 1437 1438 return events; 1439 } else { 1440 puffs_referencenode(pn); 1441 mutex_exit(&pn->pn_mtx); 1442 1443 PUFFS_MSG_ALLOC(vn, poll); 1444 poll_msg->pvnr_events = ap->a_events; 1445 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1446 PUFFS_VN_POLL, VPTOPNC(vp)); 1447 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1448 selrecord(curlwp, &pn->pn_sel); 1449 1450 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1451 NULL, error); 1452 PUFFS_MSG_RELEASE(poll); 1453 1454 return 0; 1455 } 1456 } else { 1457 return genfs_poll(v); 1458 } 1459 } 1460 1461 static int 1462 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1463 { 1464 struct puffs_node *pn = VPTOPP(vp); 1465 struct vattr va; 1466 int pflags, error; 1467 1468 /* flush out information from our metacache, see vop_setattr */ 1469 if (pn->pn_stat & PNODE_METACACHE_MASK 1470 && (pn->pn_stat & PNODE_DYING) == 0) { 1471 vattr_null(&va); 1472 error = dosetattr(vp, &va, FSCRED, 1473 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1474 if (error) 1475 return error; 1476 } 1477 1478 /* 1479 * flush pages to avoid being overly dirty 1480 */ 1481 pflags = PGO_CLEANIT; 1482 if (wait) 1483 pflags |= PGO_SYNCIO; 1484 1485 mutex_enter(vp->v_interlock); 1486 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1487 } 1488 1489 int 1490 puffs_vnop_fsync(void *v) 1491 { 1492 struct vop_fsync_args /* { 1493 const struct vnodeop_desc *a_desc; 1494 struct vnode *a_vp; 1495 kauth_cred_t a_cred; 1496 int a_flags; 1497 off_t a_offlo; 1498 off_t a_offhi; 1499 } */ *ap = v; 1500 PUFFS_MSG_VARS(vn, fsync); 1501 struct vnode *vp; 1502 struct puffs_node *pn; 1503 struct puffs_mount *pmp; 1504 int error, dofaf; 1505 1506 vp = ap->a_vp; 1507 KASSERT(vp != NULL); 1508 pn = VPTOPP(vp); 1509 KASSERT(pn != NULL); 1510 pmp = MPTOPUFFSMP(vp->v_mount); 1511 if (ap->a_flags & FSYNC_WAIT) { 1512 mutex_enter(&pn->pn_sizemtx); 1513 } else { 1514 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1515 return EDEADLK; 1516 } 1517 1518 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1519 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1520 if (error) 1521 goto out; 1522 1523 /* 1524 * HELLO! We exit already here if the user server does not 1525 * support fsync OR if we should call fsync for a node which 1526 * has references neither in the kernel or the fs server. 1527 * Otherwise we continue to issue fsync() forward. 1528 */ 1529 error = 0; 1530 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1531 goto out; 1532 1533 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1534 /* 1535 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1536 * only FAFs for those. Otherwise there's a danger of deadlock, 1537 * since the execution context here might be the user server 1538 * doing some operation on another fs, which in turn caused a 1539 * vnode to be reclaimed from the freelist for this fs. 1540 */ 1541 if (dofaf == 0) { 1542 mutex_enter(vp->v_interlock); 1543 if (vp->v_iflag & VI_XLOCK) 1544 dofaf = 1; 1545 mutex_exit(vp->v_interlock); 1546 } 1547 1548 PUFFS_MSG_ALLOC(vn, fsync); 1549 if (dofaf) 1550 puffs_msg_setfaf(park_fsync); 1551 1552 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1553 fsync_msg->pvnr_flags = ap->a_flags; 1554 fsync_msg->pvnr_offlo = ap->a_offlo; 1555 fsync_msg->pvnr_offhi = ap->a_offhi; 1556 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1557 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1558 1559 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1560 PUFFS_MSG_RELEASE(fsync); 1561 1562 error = checkerr(pmp, error, __func__); 1563 1564 out: 1565 mutex_exit(&pn->pn_sizemtx); 1566 return error; 1567 } 1568 1569 int 1570 puffs_vnop_seek(void *v) 1571 { 1572 struct vop_seek_args /* { 1573 const struct vnodeop_desc *a_desc; 1574 struct vnode *a_vp; 1575 off_t a_oldoff; 1576 off_t a_newoff; 1577 kauth_cred_t a_cred; 1578 } */ *ap = v; 1579 PUFFS_MSG_VARS(vn, seek); 1580 struct vnode *vp = ap->a_vp; 1581 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1582 int error; 1583 1584 PUFFS_MSG_ALLOC(vn, seek); 1585 seek_msg->pvnr_oldoff = ap->a_oldoff; 1586 seek_msg->pvnr_newoff = ap->a_newoff; 1587 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1588 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1589 PUFFS_VN_SEEK, VPTOPNC(vp)); 1590 1591 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1592 PUFFS_MSG_RELEASE(seek); 1593 return checkerr(pmp, error, __func__); 1594 } 1595 1596 static int 1597 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1598 struct componentname *cnp) 1599 { 1600 PUFFS_MSG_VARS(vn, remove); 1601 int error; 1602 1603 PUFFS_MSG_ALLOC(vn, remove); 1604 remove_msg->pvnr_cookie_targ = ck; 1605 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1606 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1607 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1608 1609 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1610 PUFFS_MSG_RELEASE(remove); 1611 1612 return checkerr(pmp, error, __func__); 1613 } 1614 1615 /* 1616 * XXX: can't use callremove now because can't catch setbacks with 1617 * it due to lack of a pnode argument. 1618 */ 1619 int 1620 puffs_vnop_remove(void *v) 1621 { 1622 struct vop_remove_args /* { 1623 const struct vnodeop_desc *a_desc; 1624 struct vnode *a_dvp; 1625 struct vnode *a_vp; 1626 struct componentname *a_cnp; 1627 } */ *ap = v; 1628 PUFFS_MSG_VARS(vn, remove); 1629 struct vnode *dvp = ap->a_dvp; 1630 struct vnode *vp = ap->a_vp; 1631 struct puffs_node *dpn = VPTOPP(dvp); 1632 struct puffs_node *pn = VPTOPP(vp); 1633 struct componentname *cnp = ap->a_cnp; 1634 struct mount *mp = dvp->v_mount; 1635 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1636 int error; 1637 1638 PUFFS_MSG_ALLOC(vn, remove); 1639 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1640 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1641 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1642 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1643 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1644 1645 puffs_msg_enqueue(pmp, park_remove); 1646 REFPN_AND_UNLOCKVP(dvp, dpn); 1647 if (dvp == vp) 1648 REFPN(pn); 1649 else 1650 REFPN_AND_UNLOCKVP(vp, pn); 1651 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1652 1653 PUFFS_MSG_RELEASE(remove); 1654 1655 RELEPN_AND_VP(dvp, dpn); 1656 RELEPN_AND_VP(vp, pn); 1657 1658 error = checkerr(pmp, error, __func__); 1659 return error; 1660 } 1661 1662 int 1663 puffs_vnop_mkdir(void *v) 1664 { 1665 struct vop_mkdir_args /* { 1666 const struct vnodeop_desc *a_desc; 1667 struct vnode *a_dvp; 1668 struct vnode **a_vpp; 1669 struct componentname *a_cnp; 1670 struct vattr *a_vap; 1671 } */ *ap = v; 1672 PUFFS_MSG_VARS(vn, mkdir); 1673 struct vnode *dvp = ap->a_dvp; 1674 struct puffs_node *dpn = VPTOPP(dvp); 1675 struct componentname *cnp = ap->a_cnp; 1676 struct mount *mp = dvp->v_mount; 1677 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1678 int error; 1679 1680 PUFFS_MSG_ALLOC(vn, mkdir); 1681 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1682 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1683 mkdir_msg->pvnr_va = *ap->a_vap; 1684 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1685 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1686 1687 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1688 1689 error = checkerr(pmp, error, __func__); 1690 if (error) 1691 goto out; 1692 1693 error = puffs_newnode(mp, dvp, ap->a_vpp, 1694 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1695 if (error) { 1696 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1697 mkdir_msg->pvnr_newnode, cnp); 1698 goto out; 1699 } 1700 1701 if (PUFFS_USE_FS_TTL(pmp)) { 1702 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1703 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1704 struct vattr *rvap = &mkdir_msg->pvnr_va; 1705 1706 update_va(*ap->a_vpp, NULL, rvap, va_ttl, cn_ttl); 1707 } 1708 1709 out: 1710 vput(dvp); 1711 PUFFS_MSG_RELEASE(mkdir); 1712 return error; 1713 } 1714 1715 static int 1716 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1717 struct componentname *cnp) 1718 { 1719 PUFFS_MSG_VARS(vn, rmdir); 1720 int error; 1721 1722 PUFFS_MSG_ALLOC(vn, rmdir); 1723 rmdir_msg->pvnr_cookie_targ = ck; 1724 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1725 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1726 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1727 1728 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1729 PUFFS_MSG_RELEASE(rmdir); 1730 1731 return checkerr(pmp, error, __func__); 1732 } 1733 1734 int 1735 puffs_vnop_rmdir(void *v) 1736 { 1737 struct vop_rmdir_args /* { 1738 const struct vnodeop_desc *a_desc; 1739 struct vnode *a_dvp; 1740 struct vnode *a_vp; 1741 struct componentname *a_cnp; 1742 } */ *ap = v; 1743 PUFFS_MSG_VARS(vn, rmdir); 1744 struct vnode *dvp = ap->a_dvp; 1745 struct vnode *vp = ap->a_vp; 1746 struct puffs_node *dpn = VPTOPP(dvp); 1747 struct puffs_node *pn = VPTOPP(vp); 1748 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1749 struct componentname *cnp = ap->a_cnp; 1750 int error; 1751 1752 PUFFS_MSG_ALLOC(vn, rmdir); 1753 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1754 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1755 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1756 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1757 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1758 1759 puffs_msg_enqueue(pmp, park_rmdir); 1760 REFPN_AND_UNLOCKVP(dvp, dpn); 1761 REFPN_AND_UNLOCKVP(vp, pn); 1762 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1763 1764 PUFFS_MSG_RELEASE(rmdir); 1765 1766 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1767 RELEPN_AND_VP(dvp, dpn); 1768 RELEPN_AND_VP(vp, pn); 1769 1770 return error; 1771 } 1772 1773 int 1774 puffs_vnop_link(void *v) 1775 { 1776 struct vop_link_args /* { 1777 const struct vnodeop_desc *a_desc; 1778 struct vnode *a_dvp; 1779 struct vnode *a_vp; 1780 struct componentname *a_cnp; 1781 } */ *ap = v; 1782 PUFFS_MSG_VARS(vn, link); 1783 struct vnode *dvp = ap->a_dvp; 1784 struct vnode *vp = ap->a_vp; 1785 struct puffs_node *dpn = VPTOPP(dvp); 1786 struct puffs_node *pn = VPTOPP(vp); 1787 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1788 struct componentname *cnp = ap->a_cnp; 1789 int error; 1790 1791 PUFFS_MSG_ALLOC(vn, link); 1792 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1793 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1794 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1795 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1796 PUFFS_VN_LINK, VPTOPNC(dvp)); 1797 1798 puffs_msg_enqueue(pmp, park_link); 1799 REFPN_AND_UNLOCKVP(dvp, dpn); 1800 REFPN(pn); 1801 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1802 1803 PUFFS_MSG_RELEASE(link); 1804 1805 error = checkerr(pmp, error, __func__); 1806 1807 /* 1808 * XXX: stay in touch with the cache. I don't like this, but 1809 * don't have a better solution either. See also puffs_rename(). 1810 */ 1811 if (error == 0) 1812 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1813 1814 RELEPN_AND_VP(dvp, dpn); 1815 puffs_releasenode(pn); 1816 1817 return error; 1818 } 1819 1820 int 1821 puffs_vnop_symlink(void *v) 1822 { 1823 struct vop_symlink_args /* { 1824 const struct vnodeop_desc *a_desc; 1825 struct vnode *a_dvp; 1826 struct vnode **a_vpp; 1827 struct componentname *a_cnp; 1828 struct vattr *a_vap; 1829 char *a_target; 1830 } */ *ap = v; 1831 PUFFS_MSG_VARS(vn, symlink); 1832 struct vnode *dvp = ap->a_dvp; 1833 struct puffs_node *dpn = VPTOPP(dvp); 1834 struct mount *mp = dvp->v_mount; 1835 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1836 struct componentname *cnp = ap->a_cnp; 1837 int error; 1838 1839 *ap->a_vpp = NULL; 1840 1841 PUFFS_MSG_ALLOC(vn, symlink); 1842 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1843 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1844 symlink_msg->pvnr_va = *ap->a_vap; 1845 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1846 sizeof(symlink_msg->pvnr_link)); 1847 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1848 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1849 1850 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1851 1852 error = checkerr(pmp, error, __func__); 1853 if (error) 1854 goto out; 1855 1856 error = puffs_newnode(mp, dvp, ap->a_vpp, 1857 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1858 if (error) { 1859 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1860 symlink_msg->pvnr_newnode, cnp); 1861 goto out; 1862 } 1863 1864 if (PUFFS_USE_FS_TTL(pmp)) { 1865 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 1866 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 1867 struct vattr *rvap = &symlink_msg->pvnr_va; 1868 1869 update_va(*ap->a_vpp, NULL, rvap, va_ttl, cn_ttl); 1870 } 1871 1872 out: 1873 vput(dvp); 1874 PUFFS_MSG_RELEASE(symlink); 1875 1876 return error; 1877 } 1878 1879 int 1880 puffs_vnop_readlink(void *v) 1881 { 1882 struct vop_readlink_args /* { 1883 const struct vnodeop_desc *a_desc; 1884 struct vnode *a_vp; 1885 struct uio *a_uio; 1886 kauth_cred_t a_cred; 1887 } */ *ap = v; 1888 PUFFS_MSG_VARS(vn, readlink); 1889 struct vnode *vp = ap->a_vp; 1890 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1891 size_t linklen; 1892 int error; 1893 1894 PUFFS_MSG_ALLOC(vn, readlink); 1895 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1896 linklen = sizeof(readlink_msg->pvnr_link); 1897 readlink_msg->pvnr_linklen = linklen; 1898 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1899 PUFFS_VN_READLINK, VPTOPNC(vp)); 1900 1901 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1902 error = checkerr(pmp, error, __func__); 1903 if (error) 1904 goto out; 1905 1906 /* bad bad user file server */ 1907 if (readlink_msg->pvnr_linklen > linklen) { 1908 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1909 "linklen too big", VPTOPNC(ap->a_vp)); 1910 error = EPROTO; 1911 goto out; 1912 } 1913 1914 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1915 ap->a_uio); 1916 out: 1917 PUFFS_MSG_RELEASE(readlink); 1918 return error; 1919 } 1920 1921 int 1922 puffs_vnop_rename(void *v) 1923 { 1924 struct vop_rename_args /* { 1925 const struct vnodeop_desc *a_desc; 1926 struct vnode *a_fdvp; 1927 struct vnode *a_fvp; 1928 struct componentname *a_fcnp; 1929 struct vnode *a_tdvp; 1930 struct vnode *a_tvp; 1931 struct componentname *a_tcnp; 1932 } */ *ap = v; 1933 PUFFS_MSG_VARS(vn, rename); 1934 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 1935 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 1936 struct puffs_node *fpn = ap->a_fvp->v_data; 1937 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1938 int error; 1939 bool doabort = true; 1940 1941 if ((fvp->v_mount != tdvp->v_mount) || 1942 (tvp && (fvp->v_mount != tvp->v_mount))) { 1943 ERROUT(EXDEV); 1944 } 1945 1946 PUFFS_MSG_ALLOC(vn, rename); 1947 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 1948 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 1949 if (tvp) 1950 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 1951 else 1952 rename_msg->pvnr_cookie_targ = NULL; 1953 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1954 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1955 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1956 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1957 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1958 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1959 1960 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1961 doabort = false; 1962 PUFFS_MSG_RELEASE(rename); 1963 error = checkerr(pmp, error, __func__); 1964 1965 /* 1966 * XXX: stay in touch with the cache. I don't like this, but 1967 * don't have a better solution either. See also puffs_link(). 1968 */ 1969 if (error == 0) 1970 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1971 1972 out: 1973 if (doabort) 1974 VOP_ABORTOP(tdvp, ap->a_tcnp); 1975 if (tvp != NULL) 1976 vput(tvp); 1977 if (tdvp == tvp) 1978 vrele(tdvp); 1979 else 1980 vput(tdvp); 1981 1982 if (doabort) 1983 VOP_ABORTOP(fdvp, ap->a_fcnp); 1984 vrele(fdvp); 1985 vrele(fvp); 1986 1987 return error; 1988 } 1989 1990 #define RWARGS(cont, iofl, move, offset, creds) \ 1991 (cont)->pvnr_ioflag = (iofl); \ 1992 (cont)->pvnr_resid = (move); \ 1993 (cont)->pvnr_offset = (offset); \ 1994 puffs_credcvt(&(cont)->pvnr_cred, creds) 1995 1996 int 1997 puffs_vnop_read(void *v) 1998 { 1999 struct vop_read_args /* { 2000 const struct vnodeop_desc *a_desc; 2001 struct vnode *a_vp; 2002 struct uio *a_uio; 2003 int a_ioflag; 2004 kauth_cred_t a_cred; 2005 } */ *ap = v; 2006 PUFFS_MSG_VARS(vn, read); 2007 struct vnode *vp = ap->a_vp; 2008 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2009 struct uio *uio = ap->a_uio; 2010 size_t tomove, argsize; 2011 vsize_t bytelen; 2012 int error; 2013 2014 read_msg = NULL; 2015 error = 0; 2016 2017 /* std sanity */ 2018 if (uio->uio_resid == 0) 2019 return 0; 2020 if (uio->uio_offset < 0) 2021 return EINVAL; 2022 2023 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2024 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2025 2026 while (uio->uio_resid > 0) { 2027 if (vp->v_size <= uio->uio_offset) { 2028 break; 2029 } 2030 bytelen = MIN(uio->uio_resid, 2031 vp->v_size - uio->uio_offset); 2032 if (bytelen == 0) 2033 break; 2034 2035 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2036 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2037 if (error) 2038 break; 2039 } 2040 2041 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2042 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2043 } else { 2044 /* 2045 * in case it's not a regular file or we're operating 2046 * uncached, do read in the old-fashioned style, 2047 * i.e. explicit read operations 2048 */ 2049 2050 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2051 argsize = sizeof(struct puffs_vnmsg_read); 2052 puffs_msgmem_alloc(argsize + tomove, &park_read, 2053 (void *)&read_msg, 1); 2054 2055 error = 0; 2056 while (uio->uio_resid > 0) { 2057 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2058 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2059 RWARGS(read_msg, ap->a_ioflag, tomove, 2060 uio->uio_offset, ap->a_cred); 2061 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2062 PUFFS_VN_READ, VPTOPNC(vp)); 2063 puffs_msg_setdelta(park_read, tomove); 2064 2065 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2066 NULL, error); 2067 error = checkerr(pmp, error, __func__); 2068 if (error) 2069 break; 2070 2071 if (read_msg->pvnr_resid > tomove) { 2072 puffs_senderr(pmp, PUFFS_ERR_READ, 2073 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2074 error = EPROTO; 2075 break; 2076 } 2077 2078 error = uiomove(read_msg->pvnr_data, 2079 tomove - read_msg->pvnr_resid, uio); 2080 2081 /* 2082 * in case the file is out of juice, resid from 2083 * userspace is != 0. and the error-case is 2084 * quite obvious 2085 */ 2086 if (error || read_msg->pvnr_resid) 2087 break; 2088 } 2089 2090 puffs_msgmem_release(park_read); 2091 } 2092 2093 return error; 2094 } 2095 2096 /* 2097 * XXX: in case of a failure, this leaves uio in a bad state. 2098 * We could theoretically copy the uio and iovecs and "replay" 2099 * them the right amount after the userspace trip, but don't 2100 * bother for now. 2101 */ 2102 int 2103 puffs_vnop_write(void *v) 2104 { 2105 struct vop_write_args /* { 2106 const struct vnodeop_desc *a_desc; 2107 struct vnode *a_vp; 2108 struct uio *a_uio; 2109 int a_ioflag; 2110 kauth_cred_t a_cred; 2111 } */ *ap = v; 2112 PUFFS_MSG_VARS(vn, write); 2113 struct vnode *vp = ap->a_vp; 2114 struct puffs_node *pn = VPTOPP(vp); 2115 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2116 struct uio *uio = ap->a_uio; 2117 size_t tomove, argsize; 2118 off_t oldoff, newoff, origoff; 2119 vsize_t bytelen; 2120 int error, uflags; 2121 int ubcflags; 2122 2123 error = uflags = 0; 2124 write_msg = NULL; 2125 2126 mutex_enter(&pn->pn_sizemtx); 2127 2128 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2129 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2130 2131 /* 2132 * userspace *should* be allowed to control this, 2133 * but with UBC it's a bit unclear how to handle it 2134 */ 2135 if (ap->a_ioflag & IO_APPEND) 2136 uio->uio_offset = vp->v_size; 2137 2138 origoff = uio->uio_offset; 2139 while (uio->uio_resid > 0) { 2140 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2141 uflags |= PUFFS_UPDATEATIME; 2142 uflags |= PUFFS_UPDATECTIME; 2143 uflags |= PUFFS_UPDATEMTIME; 2144 oldoff = uio->uio_offset; 2145 bytelen = uio->uio_resid; 2146 2147 newoff = oldoff + bytelen; 2148 if (vp->v_size < newoff) { 2149 uvm_vnp_setwritesize(vp, newoff); 2150 } 2151 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2152 UVM_ADV_RANDOM, ubcflags); 2153 2154 /* 2155 * In case of a ubc_uiomove() error, 2156 * opt to not extend the file at all and 2157 * return an error. Otherwise, if we attempt 2158 * to clear the memory we couldn't fault to, 2159 * we might generate a kernel page fault. 2160 */ 2161 if (vp->v_size < newoff) { 2162 if (error == 0) { 2163 uflags |= PUFFS_UPDATESIZE; 2164 uvm_vnp_setsize(vp, newoff); 2165 } else { 2166 uvm_vnp_setwritesize(vp, vp->v_size); 2167 } 2168 } 2169 if (error) 2170 break; 2171 2172 /* 2173 * If we're writing large files, flush to file server 2174 * every 64k. Otherwise we can very easily exhaust 2175 * kernel and user memory, as the file server cannot 2176 * really keep up with our writing speed. 2177 * 2178 * Note: this does *NOT* honor MNT_ASYNC, because 2179 * that gives userland too much say in the kernel. 2180 */ 2181 if (oldoff >> 16 != uio->uio_offset >> 16) { 2182 mutex_enter(vp->v_interlock); 2183 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2184 uio->uio_offset & ~0xffff, 2185 PGO_CLEANIT | PGO_SYNCIO); 2186 if (error) 2187 break; 2188 } 2189 } 2190 2191 /* synchronous I/O? */ 2192 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2193 mutex_enter(vp->v_interlock); 2194 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2195 round_page(uio->uio_offset), 2196 PGO_CLEANIT | PGO_SYNCIO); 2197 2198 /* write through page cache? */ 2199 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2200 mutex_enter(vp->v_interlock); 2201 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2202 round_page(uio->uio_offset), PGO_CLEANIT); 2203 } 2204 2205 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2206 } else { 2207 /* tomove is non-increasing */ 2208 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2209 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2210 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2211 2212 while (uio->uio_resid > 0) { 2213 /* move data to buffer */ 2214 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2215 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2216 RWARGS(write_msg, ap->a_ioflag, tomove, 2217 uio->uio_offset, ap->a_cred); 2218 error = uiomove(write_msg->pvnr_data, tomove, uio); 2219 if (error) 2220 break; 2221 2222 /* move buffer to userspace */ 2223 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2224 PUFFS_VN_WRITE, VPTOPNC(vp)); 2225 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2226 NULL, error); 2227 error = checkerr(pmp, error, __func__); 2228 if (error) 2229 break; 2230 2231 if (write_msg->pvnr_resid > tomove) { 2232 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2233 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2234 error = EPROTO; 2235 break; 2236 } 2237 2238 /* adjust file size */ 2239 if (vp->v_size < uio->uio_offset) 2240 uvm_vnp_setsize(vp, uio->uio_offset); 2241 2242 /* didn't move everything? bad userspace. bail */ 2243 if (write_msg->pvnr_resid != 0) { 2244 error = EIO; 2245 break; 2246 } 2247 } 2248 puffs_msgmem_release(park_write); 2249 } 2250 2251 mutex_exit(&pn->pn_sizemtx); 2252 return error; 2253 } 2254 2255 int 2256 puffs_vnop_print(void *v) 2257 { 2258 struct vop_print_args /* { 2259 struct vnode *a_vp; 2260 } */ *ap = v; 2261 PUFFS_MSG_VARS(vn, print); 2262 struct vnode *vp = ap->a_vp; 2263 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2264 struct puffs_node *pn = vp->v_data; 2265 int error; 2266 2267 /* kernel portion */ 2268 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2269 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2270 if (vp->v_type == VFIFO) 2271 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2272 printf("\n"); 2273 2274 /* userspace portion */ 2275 if (EXISTSOP(pmp, PRINT)) { 2276 PUFFS_MSG_ALLOC(vn, print); 2277 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2278 PUFFS_VN_PRINT, VPTOPNC(vp)); 2279 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2280 NULL, error); 2281 PUFFS_MSG_RELEASE(print); 2282 } 2283 2284 return 0; 2285 } 2286 2287 int 2288 puffs_vnop_pathconf(void *v) 2289 { 2290 struct vop_pathconf_args /* { 2291 const struct vnodeop_desc *a_desc; 2292 struct vnode *a_vp; 2293 int a_name; 2294 register_t *a_retval; 2295 } */ *ap = v; 2296 PUFFS_MSG_VARS(vn, pathconf); 2297 struct vnode *vp = ap->a_vp; 2298 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2299 int error; 2300 2301 PUFFS_MSG_ALLOC(vn, pathconf); 2302 pathconf_msg->pvnr_name = ap->a_name; 2303 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2304 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2305 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2306 error = checkerr(pmp, error, __func__); 2307 if (!error) 2308 *ap->a_retval = pathconf_msg->pvnr_retval; 2309 PUFFS_MSG_RELEASE(pathconf); 2310 2311 return error; 2312 } 2313 2314 int 2315 puffs_vnop_advlock(void *v) 2316 { 2317 struct vop_advlock_args /* { 2318 const struct vnodeop_desc *a_desc; 2319 struct vnode *a_vp; 2320 void *a_id; 2321 int a_op; 2322 struct flock *a_fl; 2323 int a_flags; 2324 } */ *ap = v; 2325 PUFFS_MSG_VARS(vn, advlock); 2326 struct vnode *vp = ap->a_vp; 2327 struct puffs_node *pn = VPTOPP(vp); 2328 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2329 int error; 2330 2331 if (!EXISTSOP(pmp, ADVLOCK)) 2332 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2333 2334 PUFFS_MSG_ALLOC(vn, advlock); 2335 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2336 sizeof(advlock_msg->pvnr_fl)); 2337 advlock_msg->pvnr_id = ap->a_id; 2338 advlock_msg->pvnr_op = ap->a_op; 2339 advlock_msg->pvnr_flags = ap->a_flags; 2340 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2341 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2342 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2343 error = checkerr(pmp, error, __func__); 2344 PUFFS_MSG_RELEASE(advlock); 2345 2346 return error; 2347 } 2348 2349 int 2350 puffs_vnop_abortop(void *v) 2351 { 2352 struct vop_abortop_args /* { 2353 struct vnode *a_dvp; 2354 struct componentname *a_cnp; 2355 }; */ *ap = v; 2356 PUFFS_MSG_VARS(vn, abortop); 2357 struct vnode *dvp = ap->a_dvp; 2358 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2359 struct componentname *cnp = ap->a_cnp; 2360 2361 if (EXISTSOP(pmp, ABORTOP)) { 2362 PUFFS_MSG_ALLOC(vn, abortop); 2363 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2364 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2365 puffs_msg_setfaf(park_abortop); 2366 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2367 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2368 2369 puffs_msg_enqueue(pmp, park_abortop); 2370 PUFFS_MSG_RELEASE(abortop); 2371 } 2372 2373 return genfs_abortop(v); 2374 } 2375 2376 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2377 2378 /* 2379 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2380 */ 2381 int 2382 puffs_vnop_strategy(void *v) 2383 { 2384 struct vop_strategy_args /* { 2385 const struct vnodeop_desc *a_desc; 2386 struct vnode *a_vp; 2387 struct buf *a_bp; 2388 } */ *ap = v; 2389 PUFFS_MSG_VARS(vn, rw); 2390 struct vnode *vp = ap->a_vp; 2391 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2392 struct puffs_node *pn; 2393 struct buf *bp; 2394 size_t argsize; 2395 size_t tomove, moved; 2396 int error, dofaf, cansleep, dobiodone; 2397 2398 pmp = MPTOPUFFSMP(vp->v_mount); 2399 bp = ap->a_bp; 2400 error = 0; 2401 dofaf = 0; 2402 cansleep = 0; 2403 pn = VPTOPP(vp); 2404 park_rw = NULL; /* explicit */ 2405 dobiodone = 1; 2406 2407 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2408 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2409 ERROUT(EOPNOTSUPP); 2410 2411 /* 2412 * Short-circuit optimization: don't flush buffer in between 2413 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2414 */ 2415 if (pn->pn_stat & PNODE_DYING) { 2416 KASSERT(BUF_ISWRITE(bp)); 2417 bp->b_resid = 0; 2418 goto out; 2419 } 2420 2421 #ifdef DIAGNOSTIC 2422 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2423 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2424 bp->b_bcount); 2425 #endif 2426 2427 /* 2428 * See explanation for the necessity of a FAF in puffs_fsync. 2429 * 2430 * Also, do FAF in case we're suspending. 2431 * See puffs_vfsops.c:pageflush() 2432 */ 2433 if (BUF_ISWRITE(bp)) { 2434 mutex_enter(vp->v_interlock); 2435 if (vp->v_iflag & VI_XLOCK) 2436 dofaf = 1; 2437 if (pn->pn_stat & PNODE_FAF) 2438 dofaf = 1; 2439 mutex_exit(vp->v_interlock); 2440 } 2441 2442 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2443 2444 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2445 2446 /* allocate transport structure */ 2447 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2448 argsize = sizeof(struct puffs_vnmsg_rw); 2449 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2450 (void *)&rw_msg, cansleep); 2451 if (error) 2452 goto out; 2453 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2454 2455 /* 2x2 cases: read/write, faf/nofaf */ 2456 if (BUF_ISREAD(bp)) { 2457 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2458 PUFFS_VN_READ, VPTOPNC(vp)); 2459 puffs_msg_setdelta(park_rw, tomove); 2460 if (BIOASYNC(bp)) { 2461 puffs_msg_setcall(park_rw, 2462 puffs_parkdone_asyncbioread, bp); 2463 puffs_msg_enqueue(pmp, park_rw); 2464 dobiodone = 0; 2465 } else { 2466 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2467 NULL, error); 2468 error = checkerr(pmp, error, __func__); 2469 if (error) 2470 goto out; 2471 2472 if (rw_msg->pvnr_resid > tomove) { 2473 puffs_senderr(pmp, PUFFS_ERR_READ, 2474 E2BIG, "resid grew", VPTOPNC(vp)); 2475 ERROUT(EPROTO); 2476 } 2477 2478 moved = tomove - rw_msg->pvnr_resid; 2479 2480 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2481 bp->b_resid = bp->b_bcount - moved; 2482 } 2483 } else { 2484 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2485 PUFFS_VN_WRITE, VPTOPNC(vp)); 2486 /* 2487 * make pages read-only before we write them if we want 2488 * write caching info 2489 */ 2490 if (PUFFS_WCACHEINFO(pmp)) { 2491 struct uvm_object *uobj = &vp->v_uobj; 2492 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2493 struct vm_page *vmp; 2494 int i; 2495 2496 for (i = 0; i < npages; i++) { 2497 vmp= uvm_pageratop((vaddr_t)bp->b_data 2498 + (i << PAGE_SHIFT)); 2499 DPRINTF(("puffs_strategy: write-protecting " 2500 "vp %p page %p, offset %" PRId64"\n", 2501 vp, vmp, vmp->offset)); 2502 mutex_enter(uobj->vmobjlock); 2503 vmp->flags |= PG_RDONLY; 2504 pmap_page_protect(vmp, VM_PROT_READ); 2505 mutex_exit(uobj->vmobjlock); 2506 } 2507 } 2508 2509 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2510 if (dofaf) { 2511 puffs_msg_setfaf(park_rw); 2512 } else if (BIOASYNC(bp)) { 2513 puffs_msg_setcall(park_rw, 2514 puffs_parkdone_asyncbiowrite, bp); 2515 dobiodone = 0; 2516 } 2517 2518 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2519 2520 if (dobiodone == 0) 2521 goto out; 2522 2523 /* 2524 * XXXXXXXX: wrong, but kernel can't survive strategy 2525 * failure currently. Here, have one more X: X. 2526 */ 2527 if (error != ENOMEM) 2528 error = 0; 2529 2530 error = checkerr(pmp, error, __func__); 2531 if (error) 2532 goto out; 2533 2534 if (rw_msg->pvnr_resid > tomove) { 2535 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2536 E2BIG, "resid grew", VPTOPNC(vp)); 2537 ERROUT(EPROTO); 2538 } 2539 2540 /* 2541 * FAF moved everything. Frankly, we don't 2542 * really have a choice. 2543 */ 2544 if (dofaf && error == 0) 2545 moved = tomove; 2546 else 2547 moved = tomove - rw_msg->pvnr_resid; 2548 2549 bp->b_resid = bp->b_bcount - moved; 2550 if (bp->b_resid != 0) { 2551 ERROUT(EIO); 2552 } 2553 } 2554 2555 out: 2556 if (park_rw) 2557 puffs_msgmem_release(park_rw); 2558 2559 if (error) 2560 bp->b_error = error; 2561 2562 if (error || dobiodone) 2563 biodone(bp); 2564 2565 return error; 2566 } 2567 2568 int 2569 puffs_vnop_mmap(void *v) 2570 { 2571 struct vop_mmap_args /* { 2572 const struct vnodeop_desc *a_desc; 2573 struct vnode *a_vp; 2574 vm_prot_t a_prot; 2575 kauth_cred_t a_cred; 2576 } */ *ap = v; 2577 PUFFS_MSG_VARS(vn, mmap); 2578 struct vnode *vp = ap->a_vp; 2579 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2580 int error; 2581 2582 if (!PUFFS_USE_PAGECACHE(pmp)) 2583 return genfs_eopnotsupp(v); 2584 2585 if (EXISTSOP(pmp, MMAP)) { 2586 PUFFS_MSG_ALLOC(vn, mmap); 2587 mmap_msg->pvnr_prot = ap->a_prot; 2588 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2589 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2590 PUFFS_VN_MMAP, VPTOPNC(vp)); 2591 2592 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2593 error = checkerr(pmp, error, __func__); 2594 PUFFS_MSG_RELEASE(mmap); 2595 } else { 2596 error = genfs_mmap(v); 2597 } 2598 2599 return error; 2600 } 2601 2602 2603 /* 2604 * The rest don't get a free trip to userspace and back, they 2605 * have to stay within the kernel. 2606 */ 2607 2608 /* 2609 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2610 * well, maybe somehow, somewhere, some day .... 2611 */ 2612 int 2613 puffs_vnop_bmap(void *v) 2614 { 2615 struct vop_bmap_args /* { 2616 const struct vnodeop_desc *a_desc; 2617 struct vnode *a_vp; 2618 daddr_t a_bn; 2619 struct vnode **a_vpp; 2620 daddr_t *a_bnp; 2621 int *a_runp; 2622 } */ *ap = v; 2623 struct puffs_mount *pmp; 2624 2625 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2626 2627 if (ap->a_vpp) 2628 *ap->a_vpp = ap->a_vp; 2629 if (ap->a_bnp) 2630 *ap->a_bnp = ap->a_bn; 2631 if (ap->a_runp) 2632 *ap->a_runp 2633 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2634 2635 return 0; 2636 } 2637 2638 /* 2639 * Handle getpages faults in puffs. We let genfs_getpages() do most 2640 * of the dirty work, but we come in this route to do accounting tasks. 2641 * If the user server has specified functions for cache notifications 2642 * about reads and/or writes, we record which type of operation we got, 2643 * for which page range, and proceed to issue a FAF notification to the 2644 * server about it. 2645 */ 2646 int 2647 puffs_vnop_getpages(void *v) 2648 { 2649 struct vop_getpages_args /* { 2650 const struct vnodeop_desc *a_desc; 2651 struct vnode *a_vp; 2652 voff_t a_offset; 2653 struct vm_page **a_m; 2654 int *a_count; 2655 int a_centeridx; 2656 vm_prot_t a_access_type; 2657 int a_advice; 2658 int a_flags; 2659 } */ *ap = v; 2660 struct puffs_mount *pmp; 2661 struct puffs_node *pn; 2662 struct vnode *vp; 2663 struct vm_page **pgs; 2664 struct puffs_cacheinfo *pcinfo = NULL; 2665 struct puffs_cacherun *pcrun; 2666 void *parkmem = NULL; 2667 size_t runsizes; 2668 int i, npages, si, streakon; 2669 int error, locked, write; 2670 2671 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2672 npages = *ap->a_count; 2673 pgs = ap->a_m; 2674 vp = ap->a_vp; 2675 pn = vp->v_data; 2676 locked = (ap->a_flags & PGO_LOCKED) != 0; 2677 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2678 2679 /* ccg xnaht - gets Wuninitialized wrong */ 2680 pcrun = NULL; 2681 runsizes = 0; 2682 2683 /* 2684 * Check that we aren't trying to fault in pages which our file 2685 * server doesn't know about. This happens if we extend a file by 2686 * skipping some pages and later try to fault in pages which 2687 * are between pn_serversize and vp_size. This check optimizes 2688 * away the common case where a file is being extended. 2689 */ 2690 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2691 struct vattr va; 2692 2693 /* try again later when we can block */ 2694 if (locked) 2695 ERROUT(EBUSY); 2696 2697 mutex_exit(vp->v_interlock); 2698 vattr_null(&va); 2699 va.va_size = vp->v_size; 2700 error = dosetattr(vp, &va, FSCRED, 0); 2701 if (error) 2702 ERROUT(error); 2703 mutex_enter(vp->v_interlock); 2704 } 2705 2706 if (write && PUFFS_WCACHEINFO(pmp)) { 2707 #ifdef notnowjohn 2708 /* allocate worst-case memory */ 2709 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2710 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2711 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2712 locked ? KM_NOSLEEP : KM_SLEEP); 2713 2714 /* 2715 * can't block if we're locked and can't mess up caching 2716 * information for fs server. so come back later, please 2717 */ 2718 if (pcinfo == NULL) 2719 ERROUT(ENOMEM); 2720 2721 parkmem = puffs_park_alloc(locked == 0); 2722 if (parkmem == NULL) 2723 ERROUT(ENOMEM); 2724 2725 pcrun = pcinfo->pcache_runs; 2726 #else 2727 (void)parkmem; 2728 #endif 2729 } 2730 2731 error = genfs_getpages(v); 2732 if (error) 2733 goto out; 2734 2735 if (PUFFS_WCACHEINFO(pmp) == 0) 2736 goto out; 2737 2738 /* 2739 * Let's see whose fault it was and inform the user server of 2740 * possibly read/written pages. Map pages from read faults 2741 * strictly read-only, since otherwise we might miss info on 2742 * when the page is actually write-faulted to. 2743 */ 2744 if (!locked) 2745 mutex_enter(vp->v_uobj.vmobjlock); 2746 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2747 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2748 if (streakon && write) { 2749 streakon = 0; 2750 pcrun[si].pcache_runend 2751 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2752 si++; 2753 } 2754 continue; 2755 } 2756 if (streakon == 0 && write) { 2757 streakon = 1; 2758 pcrun[si].pcache_runstart = pgs[i]->offset; 2759 } 2760 2761 if (!write) 2762 pgs[i]->flags |= PG_RDONLY; 2763 } 2764 /* was the last page part of our streak? */ 2765 if (streakon) { 2766 pcrun[si].pcache_runend 2767 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2768 si++; 2769 } 2770 if (!locked) 2771 mutex_exit(vp->v_uobj.vmobjlock); 2772 2773 KASSERT(si <= (npages / 2) + 1); 2774 2775 #ifdef notnowjohn 2776 /* send results to userspace */ 2777 if (write) 2778 puffs_cacheop(pmp, parkmem, pcinfo, 2779 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2780 #endif 2781 2782 out: 2783 if (error) { 2784 if (pcinfo != NULL) 2785 kmem_free(pcinfo, 2786 sizeof(struct puffs_cacheinfo) + runsizes); 2787 #ifdef notnowjohn 2788 if (parkmem != NULL) 2789 puffs_park_release(parkmem, 1); 2790 #endif 2791 } 2792 2793 return error; 2794 } 2795 2796 /* 2797 * Extended attribute support. 2798 */ 2799 2800 int 2801 puffs_vnop_getextattr(void *v) 2802 { 2803 struct vop_getextattr_args /* 2804 struct vnode *a_vp; 2805 int a_attrnamespace; 2806 const char *a_name; 2807 struct uio *a_uio; 2808 size_t *a_size; 2809 kauth_cred_t a_cred; 2810 }; */ *ap = v; 2811 PUFFS_MSG_VARS(vn, getextattr); 2812 struct vnode *vp = ap->a_vp; 2813 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2814 int attrnamespace = ap->a_attrnamespace; 2815 const char *name = ap->a_name; 2816 struct uio *uio = ap->a_uio; 2817 size_t *sizep = ap->a_size; 2818 size_t tomove, resid; 2819 int error; 2820 2821 if (uio) 2822 resid = uio->uio_resid; 2823 else 2824 resid = 0; 2825 2826 tomove = PUFFS_TOMOVE(resid, pmp); 2827 if (tomove != resid) { 2828 error = E2BIG; 2829 goto out; 2830 } 2831 2832 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2833 &park_getextattr, (void *)&getextattr_msg, 1); 2834 2835 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2836 strlcpy(getextattr_msg->pvnr_attrname, name, 2837 sizeof(getextattr_msg->pvnr_attrname)); 2838 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2839 if (sizep) 2840 getextattr_msg->pvnr_datasize = 1; 2841 getextattr_msg->pvnr_resid = tomove; 2842 2843 puffs_msg_setinfo(park_getextattr, 2844 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2845 puffs_msg_setdelta(park_getextattr, tomove); 2846 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2847 2848 error = checkerr(pmp, error, __func__); 2849 if (error) 2850 goto out; 2851 2852 resid = getextattr_msg->pvnr_resid; 2853 if (resid > tomove) { 2854 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2855 "resid grew", VPTOPNC(vp)); 2856 error = EPROTO; 2857 goto out; 2858 } 2859 2860 if (sizep) 2861 *sizep = getextattr_msg->pvnr_datasize; 2862 if (uio) 2863 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2864 2865 out: 2866 PUFFS_MSG_RELEASE(getextattr); 2867 return error; 2868 } 2869 2870 int 2871 puffs_vnop_setextattr(void *v) 2872 { 2873 struct vop_setextattr_args /* { 2874 struct vnode *a_vp; 2875 int a_attrnamespace; 2876 const char *a_name; 2877 struct uio *a_uio; 2878 kauth_cred_t a_cred; 2879 }; */ *ap = v; 2880 PUFFS_MSG_VARS(vn, setextattr); 2881 struct vnode *vp = ap->a_vp; 2882 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2883 int attrnamespace = ap->a_attrnamespace; 2884 const char *name = ap->a_name; 2885 struct uio *uio = ap->a_uio; 2886 size_t tomove, resid; 2887 int error; 2888 2889 if (uio) 2890 resid = uio->uio_resid; 2891 else 2892 resid = 0; 2893 2894 tomove = PUFFS_TOMOVE(resid, pmp); 2895 if (tomove != resid) { 2896 error = E2BIG; 2897 goto out; 2898 } 2899 2900 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2901 &park_setextattr, (void *)&setextattr_msg, 1); 2902 2903 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2904 strlcpy(setextattr_msg->pvnr_attrname, name, 2905 sizeof(setextattr_msg->pvnr_attrname)); 2906 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2907 setextattr_msg->pvnr_resid = tomove; 2908 2909 if (uio) { 2910 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2911 if (error) 2912 goto out; 2913 } 2914 2915 puffs_msg_setinfo(park_setextattr, 2916 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 2917 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 2918 2919 error = checkerr(pmp, error, __func__); 2920 if (error) 2921 goto out; 2922 2923 if (setextattr_msg->pvnr_resid != 0) 2924 error = EIO; 2925 2926 out: 2927 PUFFS_MSG_RELEASE(setextattr); 2928 2929 return error; 2930 } 2931 2932 int 2933 puffs_vnop_listextattr(void *v) 2934 { 2935 struct vop_listextattr_args /* { 2936 struct vnode *a_vp; 2937 int a_attrnamespace; 2938 struct uio *a_uio; 2939 size_t *a_size; 2940 int a_flag, 2941 kauth_cred_t a_cred; 2942 }; */ *ap = v; 2943 PUFFS_MSG_VARS(vn, listextattr); 2944 struct vnode *vp = ap->a_vp; 2945 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2946 int attrnamespace = ap->a_attrnamespace; 2947 struct uio *uio = ap->a_uio; 2948 size_t *sizep = ap->a_size; 2949 int flag = ap->a_flag; 2950 size_t tomove, resid; 2951 int error; 2952 2953 if (uio) 2954 resid = uio->uio_resid; 2955 else 2956 resid = 0; 2957 2958 tomove = PUFFS_TOMOVE(resid, pmp); 2959 if (tomove != resid) { 2960 error = E2BIG; 2961 goto out; 2962 } 2963 2964 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 2965 &park_listextattr, (void *)&listextattr_msg, 1); 2966 2967 listextattr_msg->pvnr_attrnamespace = attrnamespace; 2968 listextattr_msg->pvnr_flag = flag; 2969 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 2970 listextattr_msg->pvnr_resid = tomove; 2971 if (sizep) 2972 listextattr_msg->pvnr_datasize = 1; 2973 2974 puffs_msg_setinfo(park_listextattr, 2975 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 2976 puffs_msg_setdelta(park_listextattr, tomove); 2977 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 2978 2979 error = checkerr(pmp, error, __func__); 2980 if (error) 2981 goto out; 2982 2983 resid = listextattr_msg->pvnr_resid; 2984 if (resid > tomove) { 2985 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 2986 "resid grew", VPTOPNC(vp)); 2987 error = EPROTO; 2988 goto out; 2989 } 2990 2991 if (sizep) 2992 *sizep = listextattr_msg->pvnr_datasize; 2993 if (uio) 2994 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 2995 2996 out: 2997 PUFFS_MSG_RELEASE(listextattr); 2998 return error; 2999 } 3000 3001 int 3002 puffs_vnop_deleteextattr(void *v) 3003 { 3004 struct vop_deleteextattr_args /* { 3005 struct vnode *a_vp; 3006 int a_attrnamespace; 3007 const char *a_name; 3008 kauth_cred_t a_cred; 3009 }; */ *ap = v; 3010 PUFFS_MSG_VARS(vn, deleteextattr); 3011 struct vnode *vp = ap->a_vp; 3012 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3013 int attrnamespace = ap->a_attrnamespace; 3014 const char *name = ap->a_name; 3015 int error; 3016 3017 PUFFS_MSG_ALLOC(vn, deleteextattr); 3018 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3019 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3020 sizeof(deleteextattr_msg->pvnr_attrname)); 3021 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3022 3023 puffs_msg_setinfo(park_deleteextattr, 3024 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3025 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3026 vp->v_data, NULL, error); 3027 3028 error = checkerr(pmp, error, __func__); 3029 3030 PUFFS_MSG_RELEASE(deleteextattr); 3031 return error; 3032 } 3033 3034 /* 3035 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3036 * FAF update information for the puffs node first. 3037 */ 3038 int 3039 puffs_vnop_spec_read(void *v) 3040 { 3041 struct vop_read_args /* { 3042 const struct vnodeop_desc *a_desc; 3043 struct vnode *a_vp; 3044 struct uio *a_uio; 3045 int a_ioflag; 3046 kauth_cred_t a_cred; 3047 } */ *ap = v; 3048 3049 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3050 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3051 } 3052 3053 int 3054 puffs_vnop_spec_write(void *v) 3055 { 3056 struct vop_write_args /* { 3057 const struct vnodeop_desc *a_desc; 3058 struct vnode *a_vp; 3059 struct uio *a_uio; 3060 int a_ioflag; 3061 kauth_cred_t a_cred; 3062 } */ *ap = v; 3063 3064 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3065 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3066 } 3067 3068 int 3069 puffs_vnop_fifo_read(void *v) 3070 { 3071 struct vop_read_args /* { 3072 const struct vnodeop_desc *a_desc; 3073 struct vnode *a_vp; 3074 struct uio *a_uio; 3075 int a_ioflag; 3076 kauth_cred_t a_cred; 3077 } */ *ap = v; 3078 3079 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3080 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3081 } 3082 3083 int 3084 puffs_vnop_fifo_write(void *v) 3085 { 3086 struct vop_write_args /* { 3087 const struct vnodeop_desc *a_desc; 3088 struct vnode *a_vp; 3089 struct uio *a_uio; 3090 int a_ioflag; 3091 kauth_cred_t a_cred; 3092 } */ *ap = v; 3093 3094 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3095 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3096 } 3097
Indexes created Tue Sep 30 20:09:53 GMT 2025