puffs_vnops.c revision 1.156
1 /* $NetBSD: puffs_vnops.c,v 1.156 2011/09/21 15:36:33 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 1.156 2011/09/21 15:36:33 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 44 #include <uvm/uvm.h> 45 46 #include <fs/puffs/puffs_msgif.h> 47 #include <fs/puffs/puffs_sys.h> 48 49 #include <miscfs/fifofs/fifo.h> 50 #include <miscfs/genfs/genfs.h> 51 #include <miscfs/specfs/specdev.h> 52 53 extern struct lwp *updateproc; 54 55 int puffs_vnop_lookup(void *); 56 int puffs_vnop_create(void *); 57 int puffs_vnop_access(void *); 58 int puffs_vnop_mknod(void *); 59 int puffs_vnop_open(void *); 60 int puffs_vnop_close(void *); 61 int puffs_vnop_getattr(void *); 62 int puffs_vnop_setattr(void *); 63 int puffs_vnop_reclaim(void *); 64 int puffs_vnop_readdir(void *); 65 int puffs_vnop_poll(void *); 66 int puffs_vnop_fsync(void *); 67 int puffs_vnop_seek(void *); 68 int puffs_vnop_remove(void *); 69 int puffs_vnop_mkdir(void *); 70 int puffs_vnop_rmdir(void *); 71 int puffs_vnop_link(void *); 72 int puffs_vnop_readlink(void *); 73 int puffs_vnop_symlink(void *); 74 int puffs_vnop_rename(void *); 75 int puffs_vnop_read(void *); 76 int puffs_vnop_write(void *); 77 int puffs_vnop_fcntl(void *); 78 int puffs_vnop_ioctl(void *); 79 int puffs_vnop_inactive(void *); 80 int puffs_vnop_print(void *); 81 int puffs_vnop_pathconf(void *); 82 int puffs_vnop_advlock(void *); 83 int puffs_vnop_strategy(void *); 84 int puffs_vnop_bmap(void *); 85 int puffs_vnop_mmap(void *); 86 int puffs_vnop_getpages(void *); 87 int puffs_vnop_abortop(void *); 88 int puffs_vnop_getextattr(void *); 89 int puffs_vnop_setextattr(void *); 90 int puffs_vnop_listextattr(void *); 91 int puffs_vnop_deleteextattr(void *); 92 93 int puffs_vnop_spec_read(void *); 94 int puffs_vnop_spec_write(void *); 95 int puffs_vnop_fifo_read(void *); 96 int puffs_vnop_fifo_write(void *); 97 98 int puffs_vnop_checkop(void *); 99 100 #define puffs_vnop_lock genfs_lock 101 #define puffs_vnop_unlock genfs_unlock 102 #define puffs_vnop_islocked genfs_islocked 103 104 int (**puffs_vnodeop_p)(void *); 105 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 106 { &vop_default_desc, vn_default_error }, 107 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 108 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 109 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 110 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 111 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 112 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 113 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 114 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 115 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 116 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 117 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 118 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 119 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 120 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 121 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 122 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 123 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 124 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 125 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 126 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 127 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 128 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 129 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 130 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 131 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 132 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 133 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 134 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 135 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 136 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 137 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 138 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 139 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 140 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 141 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 142 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 143 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 144 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 145 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 146 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 147 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 148 #if 0 149 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 150 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 151 #endif 152 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 153 { NULL, NULL } 154 }; 155 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 156 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 157 158 159 int (**puffs_specop_p)(void *); 160 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 161 { &vop_default_desc, vn_default_error }, 162 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 163 { &vop_create_desc, spec_create }, /* genfs_badop */ 164 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 165 { &vop_open_desc, spec_open }, /* spec_open */ 166 { &vop_close_desc, spec_close }, /* spec_close */ 167 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 168 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 169 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 170 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 171 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 172 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 173 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 174 { &vop_poll_desc, spec_poll }, /* spec_poll */ 175 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 176 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 177 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 178 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 179 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 180 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 181 { &vop_link_desc, spec_link }, /* genfs_badop */ 182 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 183 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 184 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 185 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 186 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 187 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 188 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 189 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 190 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 191 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 192 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 193 { &vop_bmap_desc, spec_bmap }, /* dummy */ 194 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 195 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 196 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 197 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 198 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 199 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 200 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 201 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 202 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 203 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 204 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 205 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 206 #if 0 207 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 208 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 209 #endif 210 { NULL, NULL } 211 }; 212 const struct vnodeopv_desc puffs_specop_opv_desc = 213 { &puffs_specop_p, puffs_specop_entries }; 214 215 216 int (**puffs_fifoop_p)(void *); 217 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 218 { &vop_default_desc, vn_default_error }, 219 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 220 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 221 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 222 { &vop_open_desc, vn_fifo_bypass }, /* open */ 223 { &vop_close_desc, vn_fifo_bypass }, /* close */ 224 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 225 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 226 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 227 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 228 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 229 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 230 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 231 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 232 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 233 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 234 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 235 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 236 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 237 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 238 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 239 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 241 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 246 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 247 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 248 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 249 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 250 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 251 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 252 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 253 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 254 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 255 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 258 #if 0 259 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 260 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 261 #endif 262 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 263 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 264 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 265 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 266 { NULL, NULL } 267 }; 268 const struct vnodeopv_desc puffs_fifoop_opv_desc = 269 { &puffs_fifoop_p, puffs_fifoop_entries }; 270 271 272 /* "real" vnode operations */ 273 int (**puffs_msgop_p)(void *); 274 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 275 { &vop_default_desc, vn_default_error }, 276 { &vop_create_desc, puffs_vnop_create }, /* create */ 277 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 278 { &vop_open_desc, puffs_vnop_open }, /* open */ 279 { &vop_close_desc, puffs_vnop_close }, /* close */ 280 { &vop_access_desc, puffs_vnop_access }, /* access */ 281 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 282 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 283 { &vop_read_desc, puffs_vnop_read }, /* read */ 284 { &vop_write_desc, puffs_vnop_write }, /* write */ 285 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 286 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 287 { &vop_link_desc, puffs_vnop_link }, /* link */ 288 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 289 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 290 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 291 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 292 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 293 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 294 { &vop_print_desc, puffs_vnop_print }, /* print */ 295 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 296 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 297 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 298 { NULL, NULL } 299 }; 300 const struct vnodeopv_desc puffs_msgop_opv_desc = 301 { &puffs_msgop_p, puffs_msgop_entries }; 302 303 304 #define ERROUT(err) \ 305 do { \ 306 error = err; \ 307 goto out; \ 308 } while (/*CONSTCOND*/0) 309 310 /* 311 * This is a generic vnode operation handler. It checks if the necessary 312 * operations for the called vnode operation are implemented by userspace 313 * and either returns a dummy return value or proceeds to call the real 314 * vnode operation from puffs_msgop_v. 315 * 316 * XXX: this should described elsewhere and autogenerated, the complexity 317 * of the vnode operations vectors and their interrelationships is also 318 * getting a bit out of hand. Another problem is that we need this same 319 * information in the fs server code, so keeping the two in sync manually 320 * is not a viable (long term) plan. 321 */ 322 323 /* not supported, handle locking protocol */ 324 #define CHECKOP_NOTSUPP(op) \ 325 case VOP_##op##_DESCOFFSET: \ 326 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 327 return genfs_eopnotsupp(v); \ 328 break 329 330 /* always succeed, no locking */ 331 #define CHECKOP_SUCCESS(op) \ 332 case VOP_##op##_DESCOFFSET: \ 333 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 334 return 0; \ 335 break 336 337 int 338 puffs_vnop_checkop(void *v) 339 { 340 struct vop_generic_args /* { 341 struct vnodeop_desc *a_desc; 342 spooky mystery contents; 343 } */ *ap = v; 344 struct vnodeop_desc *desc = ap->a_desc; 345 struct puffs_mount *pmp; 346 struct vnode *vp; 347 int offset, rv; 348 349 offset = ap->a_desc->vdesc_vp_offsets[0]; 350 #ifdef DIAGNOSTIC 351 if (offset == VDESC_NO_OFFSET) 352 panic("puffs_checkop: no vnode, why did you call me?"); 353 #endif 354 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 355 pmp = MPTOPUFFSMP(vp->v_mount); 356 357 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 358 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 359 360 if (!ALLOPS(pmp)) { 361 switch (desc->vdesc_offset) { 362 CHECKOP_NOTSUPP(CREATE); 363 CHECKOP_NOTSUPP(MKNOD); 364 CHECKOP_NOTSUPP(GETATTR); 365 CHECKOP_NOTSUPP(SETATTR); 366 CHECKOP_NOTSUPP(READ); 367 CHECKOP_NOTSUPP(WRITE); 368 CHECKOP_NOTSUPP(FCNTL); 369 CHECKOP_NOTSUPP(IOCTL); 370 CHECKOP_NOTSUPP(REMOVE); 371 CHECKOP_NOTSUPP(LINK); 372 CHECKOP_NOTSUPP(RENAME); 373 CHECKOP_NOTSUPP(MKDIR); 374 CHECKOP_NOTSUPP(RMDIR); 375 CHECKOP_NOTSUPP(SYMLINK); 376 CHECKOP_NOTSUPP(READDIR); 377 CHECKOP_NOTSUPP(READLINK); 378 CHECKOP_NOTSUPP(PRINT); 379 CHECKOP_NOTSUPP(PATHCONF); 380 CHECKOP_NOTSUPP(GETEXTATTR); 381 CHECKOP_NOTSUPP(SETEXTATTR); 382 CHECKOP_NOTSUPP(LISTEXTATTR); 383 CHECKOP_NOTSUPP(DELETEEXTATTR); 384 385 CHECKOP_SUCCESS(ACCESS); 386 CHECKOP_SUCCESS(CLOSE); 387 CHECKOP_SUCCESS(SEEK); 388 389 case VOP_GETPAGES_DESCOFFSET: 390 if (!EXISTSOP(pmp, READ)) 391 return genfs_eopnotsupp(v); 392 break; 393 394 default: 395 panic("puffs_checkop: unhandled vnop %d", 396 desc->vdesc_offset); 397 } 398 } 399 400 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 401 402 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 403 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 404 405 return rv; 406 } 407 408 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 409 struct componentname *); 410 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 411 struct componentname *); 412 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 413 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 414 static int flushvncache(struct vnode *, off_t, off_t, bool); 415 416 417 #define PUFFS_ABORT_LOOKUP 1 418 #define PUFFS_ABORT_CREATE 2 419 #define PUFFS_ABORT_MKNOD 3 420 #define PUFFS_ABORT_MKDIR 4 421 #define PUFFS_ABORT_SYMLINK 5 422 423 /* 424 * Press the pani^Wabort button! Kernel resource allocation failed. 425 */ 426 static void 427 puffs_abortbutton(struct puffs_mount *pmp, int what, 428 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 429 { 430 431 switch (what) { 432 case PUFFS_ABORT_CREATE: 433 case PUFFS_ABORT_MKNOD: 434 case PUFFS_ABORT_SYMLINK: 435 callremove(pmp, dck, ck, cnp); 436 break; 437 case PUFFS_ABORT_MKDIR: 438 callrmdir(pmp, dck, ck, cnp); 439 break; 440 } 441 442 callinactive(pmp, ck, 0); 443 callreclaim(pmp, ck); 444 } 445 446 /* 447 * Begin vnode operations. 448 * 449 * A word from the keymaster about locks: generally we don't want 450 * to use the vnode locks at all: it creates an ugly dependency between 451 * the userlandia file server and the kernel. But we'll play along with 452 * the kernel vnode locks for now. However, even currently we attempt 453 * to release locks as early as possible. This is possible for some 454 * operations which a) don't need a locked vnode after the userspace op 455 * and b) return with the vnode unlocked. Theoretically we could 456 * unlock-do op-lock for others and order the graph in userspace, but I 457 * don't want to think of the consequences for the time being. 458 */ 459 460 int 461 puffs_vnop_lookup(void *v) 462 { 463 struct vop_lookup_args /* { 464 const struct vnodeop_desc *a_desc; 465 struct vnode *a_dvp; 466 struct vnode **a_vpp; 467 struct componentname *a_cnp; 468 } */ *ap = v; 469 PUFFS_MSG_VARS(vn, lookup); 470 struct puffs_mount *pmp; 471 struct componentname *cnp; 472 struct vnode *vp, *dvp; 473 struct puffs_node *dpn; 474 int isdot; 475 int error; 476 477 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 478 cnp = ap->a_cnp; 479 dvp = ap->a_dvp; 480 *ap->a_vpp = NULL; 481 482 /* r/o fs? we check create later to handle EEXIST */ 483 if ((cnp->cn_flags & ISLASTCN) 484 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 485 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 486 return EROFS; 487 488 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 489 490 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 491 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 492 493 /* 494 * Check if someone fed it into the cache 495 */ 496 if (PUFFS_USE_NAMECACHE(pmp)) { 497 error = cache_lookup(dvp, ap->a_vpp, cnp); 498 499 if (error >= 0) 500 return error; 501 } 502 503 if (isdot) { 504 /* deal with rename lookup semantics */ 505 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 506 return EISDIR; 507 508 vp = ap->a_dvp; 509 vref(vp); 510 *ap->a_vpp = vp; 511 return 0; 512 } 513 514 PUFFS_MSG_ALLOC(vn, lookup); 515 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 516 cnp, PUFFS_USE_FULLPNBUF(pmp)); 517 518 if (cnp->cn_flags & ISDOTDOT) 519 VOP_UNLOCK(dvp); 520 521 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 522 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 523 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 524 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 525 526 /* 527 * In case of error, there is no new vnode to play with, so be 528 * happy with the NULL value given to vpp in the beginning. 529 * Also, check if this really was an error or the target was not 530 * present. Either treat it as a non-error for CREATE/RENAME or 531 * enter the component into the negative name cache (if desired). 532 */ 533 if (error) { 534 error = checkerr(pmp, error, __func__); 535 if (error == ENOENT) { 536 /* don't allow to create files on r/o fs */ 537 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 538 && cnp->cn_nameiop == CREATE) { 539 error = EROFS; 540 541 /* adjust values if we are creating */ 542 } else if ((cnp->cn_flags & ISLASTCN) 543 && (cnp->cn_nameiop == CREATE 544 || cnp->cn_nameiop == RENAME)) { 545 error = EJUSTRETURN; 546 547 /* save negative cache entry */ 548 } else { 549 if ((cnp->cn_flags & MAKEENTRY) 550 && PUFFS_USE_NAMECACHE(pmp)) 551 cache_enter(dvp, NULL, cnp); 552 } 553 } 554 goto out; 555 } 556 557 /* 558 * Check that we don't get our parent node back, that would cause 559 * a pretty obvious deadlock. 560 */ 561 dpn = dvp->v_data; 562 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 563 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 564 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 565 error = EPROTO; 566 goto out; 567 } 568 569 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 570 if (error == PUFFS_NOSUCHCOOKIE) { 571 error = puffs_getvnode(dvp->v_mount, 572 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 573 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 574 if (error) { 575 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 576 lookup_msg->pvnr_newnode, ap->a_cnp); 577 goto out; 578 } 579 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 580 } else if (error) { 581 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 582 lookup_msg->pvnr_newnode, ap->a_cnp); 583 goto out; 584 } 585 586 *ap->a_vpp = vp; 587 588 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 589 cache_enter(dvp, vp, cnp); 590 591 /* XXX */ 592 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 593 cnp->cn_flags &= ~REQUIREDIR; 594 if (lookup_msg->pvnr_cn.pkcn_consume) 595 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 596 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 597 598 out: 599 if (cnp->cn_flags & ISDOTDOT) 600 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 601 602 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 603 PUFFS_MSG_RELEASE(lookup); 604 return error; 605 } 606 607 #define REFPN_AND_UNLOCKVP(a, b) \ 608 do { \ 609 mutex_enter(&b->pn_mtx); \ 610 puffs_referencenode(b); \ 611 mutex_exit(&b->pn_mtx); \ 612 VOP_UNLOCK(a); \ 613 } while (/*CONSTCOND*/0) 614 615 #define REFPN(b) \ 616 do { \ 617 mutex_enter(&b->pn_mtx); \ 618 puffs_referencenode(b); \ 619 mutex_exit(&b->pn_mtx); \ 620 } while (/*CONSTCOND*/0) 621 622 #define RELEPN_AND_VP(a, b) \ 623 do { \ 624 puffs_releasenode(b); \ 625 vrele(a); \ 626 } while (/*CONSTCOND*/0) 627 628 int 629 puffs_vnop_create(void *v) 630 { 631 struct vop_create_args /* { 632 const struct vnodeop_desc *a_desc; 633 struct vnode *a_dvp; 634 struct vnode **a_vpp; 635 struct componentname *a_cnp; 636 struct vattr *a_vap; 637 } */ *ap = v; 638 PUFFS_MSG_VARS(vn, create); 639 struct vnode *dvp = ap->a_dvp; 640 struct puffs_node *dpn = VPTOPP(dvp); 641 struct componentname *cnp = ap->a_cnp; 642 struct mount *mp = dvp->v_mount; 643 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 644 int error; 645 646 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 647 dvp, ap->a_cnp->cn_nameptr)); 648 649 PUFFS_MSG_ALLOC(vn, create); 650 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 651 cnp, PUFFS_USE_FULLPNBUF(pmp)); 652 create_msg->pvnr_va = *ap->a_vap; 653 puffs_msg_setinfo(park_create, PUFFSOP_VN, 654 PUFFS_VN_CREATE, VPTOPNC(dvp)); 655 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 656 657 error = checkerr(pmp, error, __func__); 658 if (error) 659 goto out; 660 661 error = puffs_newnode(mp, dvp, ap->a_vpp, 662 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 663 if (error) 664 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 665 create_msg->pvnr_newnode, cnp); 666 667 out: 668 vput(dvp); 669 670 DPRINTF(("puffs_create: return %d\n", error)); 671 PUFFS_MSG_RELEASE(create); 672 return error; 673 } 674 675 int 676 puffs_vnop_mknod(void *v) 677 { 678 struct vop_mknod_args /* { 679 const struct vnodeop_desc *a_desc; 680 struct vnode *a_dvp; 681 struct vnode **a_vpp; 682 struct componentname *a_cnp; 683 struct vattr *a_vap; 684 } */ *ap = v; 685 PUFFS_MSG_VARS(vn, mknod); 686 struct vnode *dvp = ap->a_dvp; 687 struct puffs_node *dpn = VPTOPP(dvp); 688 struct componentname *cnp = ap->a_cnp; 689 struct mount *mp = dvp->v_mount; 690 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 691 int error; 692 693 PUFFS_MSG_ALLOC(vn, mknod); 694 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 695 cnp, PUFFS_USE_FULLPNBUF(pmp)); 696 mknod_msg->pvnr_va = *ap->a_vap; 697 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 698 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 699 700 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 701 702 error = checkerr(pmp, error, __func__); 703 if (error) 704 goto out; 705 706 error = puffs_newnode(mp, dvp, ap->a_vpp, 707 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 708 ap->a_vap->va_rdev); 709 if (error) 710 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 711 mknod_msg->pvnr_newnode, cnp); 712 713 out: 714 vput(dvp); 715 PUFFS_MSG_RELEASE(mknod); 716 return error; 717 } 718 719 int 720 puffs_vnop_open(void *v) 721 { 722 struct vop_open_args /* { 723 const struct vnodeop_desc *a_desc; 724 struct vnode *a_vp; 725 int a_mode; 726 kauth_cred_t a_cred; 727 } */ *ap = v; 728 PUFFS_MSG_VARS(vn, open); 729 struct vnode *vp = ap->a_vp; 730 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 731 int mode = ap->a_mode; 732 int error; 733 734 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 735 736 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 737 ERROUT(EROFS); 738 739 if (!EXISTSOP(pmp, OPEN)) 740 ERROUT(0); 741 742 PUFFS_MSG_ALLOC(vn, open); 743 open_msg->pvnr_mode = mode; 744 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 745 puffs_msg_setinfo(park_open, PUFFSOP_VN, 746 PUFFS_VN_OPEN, VPTOPNC(vp)); 747 748 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 749 error = checkerr(pmp, error, __func__); 750 751 out: 752 DPRINTF(("puffs_open: returning %d\n", error)); 753 PUFFS_MSG_RELEASE(open); 754 return error; 755 } 756 757 int 758 puffs_vnop_close(void *v) 759 { 760 struct vop_close_args /* { 761 const struct vnodeop_desc *a_desc; 762 struct vnode *a_vp; 763 int a_fflag; 764 kauth_cred_t a_cred; 765 } */ *ap = v; 766 PUFFS_MSG_VARS(vn, close); 767 struct vnode *vp = ap->a_vp; 768 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 769 770 PUFFS_MSG_ALLOC(vn, close); 771 puffs_msg_setfaf(park_close); 772 close_msg->pvnr_fflag = ap->a_fflag; 773 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 774 puffs_msg_setinfo(park_close, PUFFSOP_VN, 775 PUFFS_VN_CLOSE, VPTOPNC(vp)); 776 777 puffs_msg_enqueue(pmp, park_close); 778 PUFFS_MSG_RELEASE(close); 779 return 0; 780 } 781 782 int 783 puffs_vnop_access(void *v) 784 { 785 struct vop_access_args /* { 786 const struct vnodeop_desc *a_desc; 787 struct vnode *a_vp; 788 int a_mode; 789 kauth_cred_t a_cred; 790 } */ *ap = v; 791 PUFFS_MSG_VARS(vn, access); 792 struct vnode *vp = ap->a_vp; 793 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 794 int mode = ap->a_mode; 795 int error; 796 797 if (mode & VWRITE) { 798 switch (vp->v_type) { 799 case VDIR: 800 case VLNK: 801 case VREG: 802 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 803 || !EXISTSOP(pmp, WRITE)) 804 return EROFS; 805 break; 806 default: 807 break; 808 } 809 } 810 811 if (!EXISTSOP(pmp, ACCESS)) 812 return 0; 813 814 PUFFS_MSG_ALLOC(vn, access); 815 access_msg->pvnr_mode = ap->a_mode; 816 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 817 puffs_msg_setinfo(park_access, PUFFSOP_VN, 818 PUFFS_VN_ACCESS, VPTOPNC(vp)); 819 820 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 821 error = checkerr(pmp, error, __func__); 822 PUFFS_MSG_RELEASE(access); 823 824 return error; 825 } 826 827 int 828 puffs_vnop_getattr(void *v) 829 { 830 struct vop_getattr_args /* { 831 const struct vnodeop_desc *a_desc; 832 struct vnode *a_vp; 833 struct vattr *a_vap; 834 kauth_cred_t a_cred; 835 } */ *ap = v; 836 PUFFS_MSG_VARS(vn, getattr); 837 struct vnode *vp = ap->a_vp; 838 struct mount *mp = vp->v_mount; 839 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 840 struct vattr *vap, *rvap; 841 struct puffs_node *pn = VPTOPP(vp); 842 int error = 0; 843 844 /* 845 * A lock is required so that we do not race with 846 * setattr, write and fsync when changing vp->v_size. 847 * This is critical, since setting a stall smaler value 848 * triggers a file truncate in uvm_vnp_setsize(), which 849 * most of the time means data corruption (a chunk of 850 * data is replaced by zeroes). This can be removed if 851 * we decide one day that VOP_GETATTR must operate on 852 * a locked vnode. 853 */ 854 mutex_enter(&pn->pn_sizemtx); 855 856 REFPN(pn); 857 vap = ap->a_vap; 858 859 PUFFS_MSG_ALLOC(vn, getattr); 860 vattr_null(&getattr_msg->pvnr_va); 861 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 862 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 863 PUFFS_VN_GETATTR, VPTOPNC(vp)); 864 865 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 866 error = checkerr(pmp, error, __func__); 867 if (error) 868 goto out; 869 870 rvap = &getattr_msg->pvnr_va; 871 /* 872 * Don't listen to the file server regarding special device 873 * size info, the file server doesn't know anything about them. 874 */ 875 if (vp->v_type == VBLK || vp->v_type == VCHR) 876 rvap->va_size = vp->v_size; 877 878 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 879 if (vp->v_type == VBLK) 880 rvap->va_blocksize = BLKDEV_IOSIZE; 881 else if (vp->v_type == VCHR) 882 rvap->va_blocksize = MAXBSIZE; 883 884 (void) memcpy(vap, rvap, sizeof(struct vattr)); 885 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 886 887 if (pn->pn_stat & PNODE_METACACHE_ATIME) 888 vap->va_atime = pn->pn_mc_atime; 889 if (pn->pn_stat & PNODE_METACACHE_CTIME) 890 vap->va_ctime = pn->pn_mc_ctime; 891 if (pn->pn_stat & PNODE_METACACHE_MTIME) 892 vap->va_mtime = pn->pn_mc_mtime; 893 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 894 vap->va_size = pn->pn_mc_size; 895 } else { 896 if (rvap->va_size != VNOVAL 897 && vp->v_type != VBLK && vp->v_type != VCHR) { 898 uvm_vnp_setsize(vp, rvap->va_size); 899 pn->pn_serversize = rvap->va_size; 900 } 901 } 902 903 out: 904 puffs_releasenode(pn); 905 PUFFS_MSG_RELEASE(getattr); 906 907 mutex_exit(&pn->pn_sizemtx); 908 909 return error; 910 } 911 912 #define SETATTR_CHSIZE 0x01 913 #define SETATTR_ASYNC 0x02 914 static int 915 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 916 { 917 PUFFS_MSG_VARS(vn, setattr); 918 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 919 struct puffs_node *pn = vp->v_data; 920 int error = 0; 921 922 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 923 924 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 925 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 926 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 927 || vap->va_mode != (mode_t)VNOVAL)) 928 return EROFS; 929 930 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 931 && vp->v_type == VREG && vap->va_size != VNOVAL) 932 return EROFS; 933 934 /* 935 * Flush metacache first. If we are called with some explicit 936 * parameters, treat them as information overriding metacache 937 * information. 938 */ 939 if (pn->pn_stat & PNODE_METACACHE_MASK) { 940 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 941 && vap->va_atime.tv_sec == VNOVAL) 942 vap->va_atime = pn->pn_mc_atime; 943 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 944 && vap->va_ctime.tv_sec == VNOVAL) 945 vap->va_ctime = pn->pn_mc_ctime; 946 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 947 && vap->va_mtime.tv_sec == VNOVAL) 948 vap->va_mtime = pn->pn_mc_mtime; 949 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 950 && vap->va_size == VNOVAL) 951 vap->va_size = pn->pn_mc_size; 952 953 pn->pn_stat &= ~PNODE_METACACHE_MASK; 954 } 955 956 PUFFS_MSG_ALLOC(vn, setattr); 957 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 958 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 959 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 960 PUFFS_VN_SETATTR, VPTOPNC(vp)); 961 if (flags & SETATTR_ASYNC) 962 puffs_msg_setfaf(park_setattr); 963 964 puffs_msg_enqueue(pmp, park_setattr); 965 if ((flags & SETATTR_ASYNC) == 0) 966 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 967 PUFFS_MSG_RELEASE(setattr); 968 if ((flags & SETATTR_ASYNC) == 0) { 969 error = checkerr(pmp, error, __func__); 970 if (error) 971 return error; 972 } else { 973 error = 0; 974 } 975 976 if (vap->va_size != VNOVAL) { 977 pn->pn_serversize = vap->va_size; 978 if (flags & SETATTR_CHSIZE) 979 uvm_vnp_setsize(vp, vap->va_size); 980 } 981 982 return 0; 983 } 984 985 int 986 puffs_vnop_setattr(void *v) 987 { 988 struct vop_getattr_args /* { 989 const struct vnodeop_desc *a_desc; 990 struct vnode *a_vp; 991 struct vattr *a_vap; 992 kauth_cred_t a_cred; 993 } */ *ap = v; 994 struct puffs_node *pn = ap->a_vp->v_data; 995 int error; 996 997 mutex_enter(&pn->pn_sizemtx); 998 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 999 mutex_exit(&pn->pn_sizemtx); 1000 1001 return error; 1002 } 1003 1004 static __inline int 1005 doinact(struct puffs_mount *pmp, int iaflag) 1006 { 1007 1008 if (EXISTSOP(pmp, INACTIVE)) 1009 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1010 if (iaflag || ALLOPS(pmp)) 1011 return 1; 1012 else 1013 return 0; 1014 else 1015 return 1; 1016 else 1017 return 0; 1018 } 1019 1020 static void 1021 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1022 { 1023 int error; 1024 PUFFS_MSG_VARS(vn, inactive); 1025 1026 if (doinact(pmp, iaflag)) { 1027 PUFFS_MSG_ALLOC(vn, inactive); 1028 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1029 PUFFS_VN_INACTIVE, ck); 1030 1031 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1032 PUFFS_MSG_RELEASE(inactive); 1033 } 1034 } 1035 1036 /* XXX: callinactive can't setback */ 1037 int 1038 puffs_vnop_inactive(void *v) 1039 { 1040 struct vop_inactive_args /* { 1041 const struct vnodeop_desc *a_desc; 1042 struct vnode *a_vp; 1043 } */ *ap = v; 1044 PUFFS_MSG_VARS(vn, inactive); 1045 struct vnode *vp = ap->a_vp; 1046 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1047 struct puffs_node *pnode; 1048 int error; 1049 1050 pnode = vp->v_data; 1051 mutex_enter(&pnode->pn_sizemtx); 1052 1053 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1054 flushvncache(vp, 0, 0, false); 1055 PUFFS_MSG_ALLOC(vn, inactive); 1056 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1057 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1058 1059 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1060 NULL, error); 1061 PUFFS_MSG_RELEASE(inactive); 1062 } 1063 pnode->pn_stat &= ~PNODE_DOINACT; 1064 1065 /* 1066 * file server thinks it's gone? then don't be afraid care, 1067 * node's life was already all it would ever be 1068 */ 1069 if (pnode->pn_stat & PNODE_NOREFS) { 1070 pnode->pn_stat |= PNODE_DYING; 1071 *ap->a_recycle = true; 1072 } 1073 1074 mutex_exit(&pnode->pn_sizemtx); 1075 VOP_UNLOCK(vp); 1076 1077 return 0; 1078 } 1079 1080 static void 1081 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1082 { 1083 PUFFS_MSG_VARS(vn, reclaim); 1084 1085 if (!EXISTSOP(pmp, RECLAIM)) 1086 return; 1087 1088 PUFFS_MSG_ALLOC(vn, reclaim); 1089 puffs_msg_setfaf(park_reclaim); 1090 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1091 1092 puffs_msg_enqueue(pmp, park_reclaim); 1093 PUFFS_MSG_RELEASE(reclaim); 1094 } 1095 1096 /* 1097 * always FAF, we don't really care if the server wants to fail to 1098 * reclaim the node or not 1099 */ 1100 int 1101 puffs_vnop_reclaim(void *v) 1102 { 1103 struct vop_reclaim_args /* { 1104 const struct vnodeop_desc *a_desc; 1105 struct vnode *a_vp; 1106 } */ *ap = v; 1107 struct vnode *vp = ap->a_vp; 1108 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1109 struct puffs_node *pnode = vp->v_data; 1110 bool notifyserver = true; 1111 1112 /* 1113 * first things first: check if someone is trying to reclaim the 1114 * root vnode. do not allow that to travel to userspace. 1115 * Note that we don't need to take the lock similarly to 1116 * puffs_root(), since there is only one of us. 1117 */ 1118 if (vp->v_vflag & VV_ROOT) { 1119 mutex_enter(&pmp->pmp_lock); 1120 KASSERT(pmp->pmp_root != NULL); 1121 pmp->pmp_root = NULL; 1122 mutex_exit(&pmp->pmp_lock); 1123 notifyserver = false; 1124 } 1125 1126 /* 1127 * purge info from kernel before issueing FAF, since we 1128 * don't really know when we'll get around to it after 1129 * that and someone might race us into node creation 1130 */ 1131 mutex_enter(&pmp->pmp_lock); 1132 LIST_REMOVE(pnode, pn_hashent); 1133 mutex_exit(&pmp->pmp_lock); 1134 1135 if (notifyserver) 1136 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1137 1138 puffs_putvnode(vp); 1139 vp->v_data = NULL; 1140 1141 return 0; 1142 } 1143 1144 #define CSIZE sizeof(**ap->a_cookies) 1145 int 1146 puffs_vnop_readdir(void *v) 1147 { 1148 struct vop_readdir_args /* { 1149 const struct vnodeop_desc *a_desc; 1150 struct vnode *a_vp; 1151 struct uio *a_uio; 1152 kauth_cred_t a_cred; 1153 int *a_eofflag; 1154 off_t **a_cookies; 1155 int *a_ncookies; 1156 } */ *ap = v; 1157 PUFFS_MSG_VARS(vn, readdir); 1158 struct vnode *vp = ap->a_vp; 1159 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1160 size_t argsize, tomove, cookiemem, cookiesmax; 1161 struct uio *uio = ap->a_uio; 1162 size_t howmuch, resid; 1163 int error; 1164 1165 /* 1166 * ok, so we need: resid + cookiemem = maxreq 1167 * => resid + cookiesize * (resid/minsize) = maxreq 1168 * => resid + cookiesize/minsize * resid = maxreq 1169 * => (cookiesize/minsize + 1) * resid = maxreq 1170 * => resid = maxreq / (cookiesize/minsize + 1) 1171 * 1172 * Since cookiesize <= minsize and we're not very big on floats, 1173 * we approximate that to be 1. Therefore: 1174 * 1175 * resid = maxreq / 2; 1176 * 1177 * Well, at least we didn't have to use differential equations 1178 * or the Gram-Schmidt process. 1179 * 1180 * (yes, I'm very afraid of this) 1181 */ 1182 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1183 1184 if (ap->a_cookies) { 1185 KASSERT(ap->a_ncookies != NULL); 1186 if (pmp->pmp_args.pa_fhsize == 0) 1187 return EOPNOTSUPP; 1188 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1189 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1190 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1191 } else { 1192 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1193 cookiesmax = 0; 1194 cookiemem = 0; 1195 } 1196 1197 argsize = sizeof(struct puffs_vnmsg_readdir); 1198 tomove = resid + cookiemem; 1199 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1200 (void *)&readdir_msg, 1); 1201 1202 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1203 readdir_msg->pvnr_offset = uio->uio_offset; 1204 readdir_msg->pvnr_resid = resid; 1205 readdir_msg->pvnr_ncookies = cookiesmax; 1206 readdir_msg->pvnr_eofflag = 0; 1207 readdir_msg->pvnr_dentoff = cookiemem; 1208 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1209 PUFFS_VN_READDIR, VPTOPNC(vp)); 1210 puffs_msg_setdelta(park_readdir, tomove); 1211 1212 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1213 error = checkerr(pmp, error, __func__); 1214 if (error) 1215 goto out; 1216 1217 /* userspace is cheating? */ 1218 if (readdir_msg->pvnr_resid > resid) { 1219 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1220 "resid grew", VPTOPNC(vp)); 1221 ERROUT(EPROTO); 1222 } 1223 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1224 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1225 "too many cookies", VPTOPNC(vp)); 1226 ERROUT(EPROTO); 1227 } 1228 1229 /* check eof */ 1230 if (readdir_msg->pvnr_eofflag) 1231 *ap->a_eofflag = 1; 1232 1233 /* bouncy-wouncy with the directory data */ 1234 howmuch = resid - readdir_msg->pvnr_resid; 1235 1236 /* force eof if no data was returned (getcwd() needs this) */ 1237 if (howmuch == 0) { 1238 *ap->a_eofflag = 1; 1239 goto out; 1240 } 1241 1242 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1243 if (error) 1244 goto out; 1245 1246 /* provide cookies to caller if so desired */ 1247 if (ap->a_cookies) { 1248 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1249 M_TEMP, M_WAITOK); 1250 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1251 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1252 *ap->a_ncookies*CSIZE); 1253 } 1254 1255 /* next readdir starts here */ 1256 uio->uio_offset = readdir_msg->pvnr_offset; 1257 1258 out: 1259 puffs_msgmem_release(park_readdir); 1260 return error; 1261 } 1262 #undef CSIZE 1263 1264 /* 1265 * poll works by consuming the bitmask in pn_revents. If there are 1266 * events available, poll returns immediately. If not, it issues a 1267 * poll to userspace, selrecords itself and returns with no available 1268 * events. When the file server returns, it executes puffs_parkdone_poll(), 1269 * where available events are added to the bitmask. selnotify() is 1270 * then also executed by that function causing us to enter here again 1271 * and hopefully find the missing bits (unless someone got them first, 1272 * in which case it starts all over again). 1273 */ 1274 int 1275 puffs_vnop_poll(void *v) 1276 { 1277 struct vop_poll_args /* { 1278 const struct vnodeop_desc *a_desc; 1279 struct vnode *a_vp; 1280 int a_events; 1281 } */ *ap = v; 1282 PUFFS_MSG_VARS(vn, poll); 1283 struct vnode *vp = ap->a_vp; 1284 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1285 struct puffs_node *pn = vp->v_data; 1286 int events, error; 1287 1288 if (EXISTSOP(pmp, POLL)) { 1289 mutex_enter(&pn->pn_mtx); 1290 events = pn->pn_revents & ap->a_events; 1291 if (events & ap->a_events) { 1292 pn->pn_revents &= ~ap->a_events; 1293 mutex_exit(&pn->pn_mtx); 1294 1295 return events; 1296 } else { 1297 puffs_referencenode(pn); 1298 mutex_exit(&pn->pn_mtx); 1299 1300 PUFFS_MSG_ALLOC(vn, poll); 1301 poll_msg->pvnr_events = ap->a_events; 1302 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1303 PUFFS_VN_POLL, VPTOPNC(vp)); 1304 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1305 selrecord(curlwp, &pn->pn_sel); 1306 1307 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1308 NULL, error); 1309 PUFFS_MSG_RELEASE(poll); 1310 1311 return 0; 1312 } 1313 } else { 1314 return genfs_poll(v); 1315 } 1316 } 1317 1318 static int 1319 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1320 { 1321 struct puffs_node *pn = VPTOPP(vp); 1322 struct vattr va; 1323 int pflags, error; 1324 1325 /* flush out information from our metacache, see vop_setattr */ 1326 if (pn->pn_stat & PNODE_METACACHE_MASK 1327 && (pn->pn_stat & PNODE_DYING) == 0) { 1328 vattr_null(&va); 1329 error = dosetattr(vp, &va, FSCRED, 1330 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1331 if (error) 1332 return error; 1333 } 1334 1335 /* 1336 * flush pages to avoid being overly dirty 1337 */ 1338 pflags = PGO_CLEANIT; 1339 if (wait) 1340 pflags |= PGO_SYNCIO; 1341 mutex_enter(vp->v_interlock); 1342 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1343 } 1344 1345 int 1346 puffs_vnop_fsync(void *v) 1347 { 1348 struct vop_fsync_args /* { 1349 const struct vnodeop_desc *a_desc; 1350 struct vnode *a_vp; 1351 kauth_cred_t a_cred; 1352 int a_flags; 1353 off_t a_offlo; 1354 off_t a_offhi; 1355 } */ *ap = v; 1356 PUFFS_MSG_VARS(vn, fsync); 1357 struct vnode *vp = ap->a_vp; 1358 struct puffs_node *pn = VPTOPP(vp); 1359 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1360 int error, dofaf; 1361 1362 /* 1363 * Make sure ioflush does not get stuck in low 1364 * memory conditions: it should not wait for the 1365 * mutex. 1366 */ 1367 if (curlwp == updateproc) 1368 KASSERT((ap->a_flags & FSYNC_WAIT) == 0); 1369 1370 if (ap->a_flags & FSYNC_WAIT) { 1371 mutex_enter(&pn->pn_sizemtx); 1372 } else { 1373 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1374 return EDEADLK; 1375 } 1376 1377 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1378 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1379 if (error) 1380 goto out; 1381 1382 /* 1383 * HELLO! We exit already here if the user server does not 1384 * support fsync OR if we should call fsync for a node which 1385 * has references neither in the kernel or the fs server. 1386 * Otherwise we continue to issue fsync() forward. 1387 */ 1388 error = 0; 1389 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1390 goto out; 1391 1392 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1393 /* 1394 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1395 * only FAFs for those. Otherwise there's a danger of deadlock, 1396 * since the execution context here might be the user server 1397 * doing some operation on another fs, which in turn caused a 1398 * vnode to be reclaimed from the freelist for this fs. 1399 */ 1400 if (dofaf == 0) { 1401 mutex_enter(vp->v_interlock); 1402 if (vp->v_iflag & VI_XLOCK) 1403 dofaf = 1; 1404 mutex_exit(vp->v_interlock); 1405 } 1406 1407 PUFFS_MSG_ALLOC(vn, fsync); 1408 if (dofaf) 1409 puffs_msg_setfaf(park_fsync); 1410 1411 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1412 fsync_msg->pvnr_flags = ap->a_flags; 1413 fsync_msg->pvnr_offlo = ap->a_offlo; 1414 fsync_msg->pvnr_offhi = ap->a_offhi; 1415 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1416 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1417 1418 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1419 PUFFS_MSG_RELEASE(fsync); 1420 1421 error = checkerr(pmp, error, __func__); 1422 1423 out: 1424 mutex_exit(&pn->pn_sizemtx); 1425 return error; 1426 } 1427 1428 int 1429 puffs_vnop_seek(void *v) 1430 { 1431 struct vop_seek_args /* { 1432 const struct vnodeop_desc *a_desc; 1433 struct vnode *a_vp; 1434 off_t a_oldoff; 1435 off_t a_newoff; 1436 kauth_cred_t a_cred; 1437 } */ *ap = v; 1438 PUFFS_MSG_VARS(vn, seek); 1439 struct vnode *vp = ap->a_vp; 1440 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1441 int error; 1442 1443 PUFFS_MSG_ALLOC(vn, seek); 1444 seek_msg->pvnr_oldoff = ap->a_oldoff; 1445 seek_msg->pvnr_newoff = ap->a_newoff; 1446 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1447 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1448 PUFFS_VN_SEEK, VPTOPNC(vp)); 1449 1450 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1451 PUFFS_MSG_RELEASE(seek); 1452 return checkerr(pmp, error, __func__); 1453 } 1454 1455 static int 1456 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1457 struct componentname *cnp) 1458 { 1459 PUFFS_MSG_VARS(vn, remove); 1460 int error; 1461 1462 PUFFS_MSG_ALLOC(vn, remove); 1463 remove_msg->pvnr_cookie_targ = ck; 1464 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1465 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1466 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1467 1468 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1469 PUFFS_MSG_RELEASE(remove); 1470 1471 return checkerr(pmp, error, __func__); 1472 } 1473 1474 /* 1475 * XXX: can't use callremove now because can't catch setbacks with 1476 * it due to lack of a pnode argument. 1477 */ 1478 int 1479 puffs_vnop_remove(void *v) 1480 { 1481 struct vop_remove_args /* { 1482 const struct vnodeop_desc *a_desc; 1483 struct vnode *a_dvp; 1484 struct vnode *a_vp; 1485 struct componentname *a_cnp; 1486 } */ *ap = v; 1487 PUFFS_MSG_VARS(vn, remove); 1488 struct vnode *dvp = ap->a_dvp; 1489 struct vnode *vp = ap->a_vp; 1490 struct puffs_node *dpn = VPTOPP(dvp); 1491 struct puffs_node *pn = VPTOPP(vp); 1492 struct componentname *cnp = ap->a_cnp; 1493 struct mount *mp = dvp->v_mount; 1494 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1495 int error; 1496 1497 PUFFS_MSG_ALLOC(vn, remove); 1498 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1499 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1500 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1501 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1502 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1503 1504 puffs_msg_enqueue(pmp, park_remove); 1505 REFPN_AND_UNLOCKVP(dvp, dpn); 1506 if (dvp == vp) 1507 REFPN(pn); 1508 else 1509 REFPN_AND_UNLOCKVP(vp, pn); 1510 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1511 1512 PUFFS_MSG_RELEASE(remove); 1513 1514 RELEPN_AND_VP(dvp, dpn); 1515 RELEPN_AND_VP(vp, pn); 1516 1517 error = checkerr(pmp, error, __func__); 1518 return error; 1519 } 1520 1521 int 1522 puffs_vnop_mkdir(void *v) 1523 { 1524 struct vop_mkdir_args /* { 1525 const struct vnodeop_desc *a_desc; 1526 struct vnode *a_dvp; 1527 struct vnode **a_vpp; 1528 struct componentname *a_cnp; 1529 struct vattr *a_vap; 1530 } */ *ap = v; 1531 PUFFS_MSG_VARS(vn, mkdir); 1532 struct vnode *dvp = ap->a_dvp; 1533 struct puffs_node *dpn = VPTOPP(dvp); 1534 struct componentname *cnp = ap->a_cnp; 1535 struct mount *mp = dvp->v_mount; 1536 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1537 int error; 1538 1539 PUFFS_MSG_ALLOC(vn, mkdir); 1540 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1541 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1542 mkdir_msg->pvnr_va = *ap->a_vap; 1543 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1544 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1545 1546 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1547 1548 error = checkerr(pmp, error, __func__); 1549 if (error) 1550 goto out; 1551 1552 error = puffs_newnode(mp, dvp, ap->a_vpp, 1553 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1554 if (error) 1555 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1556 mkdir_msg->pvnr_newnode, cnp); 1557 1558 out: 1559 vput(dvp); 1560 PUFFS_MSG_RELEASE(mkdir); 1561 return error; 1562 } 1563 1564 static int 1565 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1566 struct componentname *cnp) 1567 { 1568 PUFFS_MSG_VARS(vn, rmdir); 1569 int error; 1570 1571 PUFFS_MSG_ALLOC(vn, rmdir); 1572 rmdir_msg->pvnr_cookie_targ = ck; 1573 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1574 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1575 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1576 1577 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1578 PUFFS_MSG_RELEASE(rmdir); 1579 1580 return checkerr(pmp, error, __func__); 1581 } 1582 1583 int 1584 puffs_vnop_rmdir(void *v) 1585 { 1586 struct vop_rmdir_args /* { 1587 const struct vnodeop_desc *a_desc; 1588 struct vnode *a_dvp; 1589 struct vnode *a_vp; 1590 struct componentname *a_cnp; 1591 } */ *ap = v; 1592 PUFFS_MSG_VARS(vn, rmdir); 1593 struct vnode *dvp = ap->a_dvp; 1594 struct vnode *vp = ap->a_vp; 1595 struct puffs_node *dpn = VPTOPP(dvp); 1596 struct puffs_node *pn = VPTOPP(vp); 1597 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1598 struct componentname *cnp = ap->a_cnp; 1599 int error; 1600 1601 PUFFS_MSG_ALLOC(vn, rmdir); 1602 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1603 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1604 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1605 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1606 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1607 1608 puffs_msg_enqueue(pmp, park_rmdir); 1609 REFPN_AND_UNLOCKVP(dvp, dpn); 1610 REFPN_AND_UNLOCKVP(vp, pn); 1611 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1612 1613 PUFFS_MSG_RELEASE(rmdir); 1614 1615 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1616 RELEPN_AND_VP(dvp, dpn); 1617 RELEPN_AND_VP(vp, pn); 1618 1619 return error; 1620 } 1621 1622 int 1623 puffs_vnop_link(void *v) 1624 { 1625 struct vop_link_args /* { 1626 const struct vnodeop_desc *a_desc; 1627 struct vnode *a_dvp; 1628 struct vnode *a_vp; 1629 struct componentname *a_cnp; 1630 } */ *ap = v; 1631 PUFFS_MSG_VARS(vn, link); 1632 struct vnode *dvp = ap->a_dvp; 1633 struct vnode *vp = ap->a_vp; 1634 struct puffs_node *dpn = VPTOPP(dvp); 1635 struct puffs_node *pn = VPTOPP(vp); 1636 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1637 struct componentname *cnp = ap->a_cnp; 1638 int error; 1639 1640 PUFFS_MSG_ALLOC(vn, link); 1641 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1642 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1643 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1644 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1645 PUFFS_VN_LINK, VPTOPNC(dvp)); 1646 1647 puffs_msg_enqueue(pmp, park_link); 1648 REFPN_AND_UNLOCKVP(dvp, dpn); 1649 REFPN(pn); 1650 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1651 1652 PUFFS_MSG_RELEASE(link); 1653 1654 error = checkerr(pmp, error, __func__); 1655 1656 /* 1657 * XXX: stay in touch with the cache. I don't like this, but 1658 * don't have a better solution either. See also puffs_rename(). 1659 */ 1660 if (error == 0) 1661 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1662 1663 RELEPN_AND_VP(dvp, dpn); 1664 puffs_releasenode(pn); 1665 1666 return error; 1667 } 1668 1669 int 1670 puffs_vnop_symlink(void *v) 1671 { 1672 struct vop_symlink_args /* { 1673 const struct vnodeop_desc *a_desc; 1674 struct vnode *a_dvp; 1675 struct vnode **a_vpp; 1676 struct componentname *a_cnp; 1677 struct vattr *a_vap; 1678 char *a_target; 1679 } */ *ap = v; 1680 PUFFS_MSG_VARS(vn, symlink); 1681 struct vnode *dvp = ap->a_dvp; 1682 struct puffs_node *dpn = VPTOPP(dvp); 1683 struct mount *mp = dvp->v_mount; 1684 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1685 struct componentname *cnp = ap->a_cnp; 1686 int error; 1687 1688 *ap->a_vpp = NULL; 1689 1690 PUFFS_MSG_ALLOC(vn, symlink); 1691 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1692 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1693 symlink_msg->pvnr_va = *ap->a_vap; 1694 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1695 sizeof(symlink_msg->pvnr_link)); 1696 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1697 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1698 1699 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1700 1701 error = checkerr(pmp, error, __func__); 1702 if (error) 1703 goto out; 1704 1705 error = puffs_newnode(mp, dvp, ap->a_vpp, 1706 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1707 if (error) 1708 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1709 symlink_msg->pvnr_newnode, cnp); 1710 1711 out: 1712 vput(dvp); 1713 PUFFS_MSG_RELEASE(symlink); 1714 1715 return error; 1716 } 1717 1718 int 1719 puffs_vnop_readlink(void *v) 1720 { 1721 struct vop_readlink_args /* { 1722 const struct vnodeop_desc *a_desc; 1723 struct vnode *a_vp; 1724 struct uio *a_uio; 1725 kauth_cred_t a_cred; 1726 } */ *ap = v; 1727 PUFFS_MSG_VARS(vn, readlink); 1728 struct vnode *vp = ap->a_vp; 1729 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1730 size_t linklen; 1731 int error; 1732 1733 PUFFS_MSG_ALLOC(vn, readlink); 1734 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1735 linklen = sizeof(readlink_msg->pvnr_link); 1736 readlink_msg->pvnr_linklen = linklen; 1737 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1738 PUFFS_VN_READLINK, VPTOPNC(vp)); 1739 1740 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1741 error = checkerr(pmp, error, __func__); 1742 if (error) 1743 goto out; 1744 1745 /* bad bad user file server */ 1746 if (readlink_msg->pvnr_linklen > linklen) { 1747 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1748 "linklen too big", VPTOPNC(ap->a_vp)); 1749 error = EPROTO; 1750 goto out; 1751 } 1752 1753 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1754 ap->a_uio); 1755 out: 1756 PUFFS_MSG_RELEASE(readlink); 1757 return error; 1758 } 1759 1760 int 1761 puffs_vnop_rename(void *v) 1762 { 1763 struct vop_rename_args /* { 1764 const struct vnodeop_desc *a_desc; 1765 struct vnode *a_fdvp; 1766 struct vnode *a_fvp; 1767 struct componentname *a_fcnp; 1768 struct vnode *a_tdvp; 1769 struct vnode *a_tvp; 1770 struct componentname *a_tcnp; 1771 } */ *ap = v; 1772 PUFFS_MSG_VARS(vn, rename); 1773 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 1774 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 1775 struct puffs_node *fpn = ap->a_fvp->v_data; 1776 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1777 int error; 1778 bool doabort = true; 1779 1780 if ((fvp->v_mount != tdvp->v_mount) || 1781 (tvp && (fvp->v_mount != tvp->v_mount))) { 1782 ERROUT(EXDEV); 1783 } 1784 1785 PUFFS_MSG_ALLOC(vn, rename); 1786 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 1787 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 1788 if (tvp) 1789 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 1790 else 1791 rename_msg->pvnr_cookie_targ = NULL; 1792 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1793 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1794 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1795 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1796 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1797 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1798 1799 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1800 doabort = false; 1801 PUFFS_MSG_RELEASE(rename); 1802 error = checkerr(pmp, error, __func__); 1803 1804 /* 1805 * XXX: stay in touch with the cache. I don't like this, but 1806 * don't have a better solution either. See also puffs_link(). 1807 */ 1808 if (error == 0) 1809 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1810 1811 out: 1812 if (doabort) 1813 VOP_ABORTOP(tdvp, ap->a_tcnp); 1814 if (tvp != NULL) 1815 vput(tvp); 1816 if (tdvp == tvp) 1817 vrele(tdvp); 1818 else 1819 vput(tdvp); 1820 1821 if (doabort) 1822 VOP_ABORTOP(fdvp, ap->a_fcnp); 1823 vrele(fdvp); 1824 vrele(fvp); 1825 1826 return error; 1827 } 1828 1829 #define RWARGS(cont, iofl, move, offset, creds) \ 1830 (cont)->pvnr_ioflag = (iofl); \ 1831 (cont)->pvnr_resid = (move); \ 1832 (cont)->pvnr_offset = (offset); \ 1833 puffs_credcvt(&(cont)->pvnr_cred, creds) 1834 1835 int 1836 puffs_vnop_read(void *v) 1837 { 1838 struct vop_read_args /* { 1839 const struct vnodeop_desc *a_desc; 1840 struct vnode *a_vp; 1841 struct uio *a_uio; 1842 int a_ioflag; 1843 kauth_cred_t a_cred; 1844 } */ *ap = v; 1845 PUFFS_MSG_VARS(vn, read); 1846 struct vnode *vp = ap->a_vp; 1847 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1848 struct uio *uio = ap->a_uio; 1849 size_t tomove, argsize; 1850 vsize_t bytelen; 1851 int error; 1852 1853 read_msg = NULL; 1854 error = 0; 1855 1856 /* std sanity */ 1857 if (uio->uio_resid == 0) 1858 return 0; 1859 if (uio->uio_offset < 0) 1860 return EINVAL; 1861 1862 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1863 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1864 1865 while (uio->uio_resid > 0) { 1866 bytelen = MIN(uio->uio_resid, 1867 vp->v_size - uio->uio_offset); 1868 if (bytelen == 0) 1869 break; 1870 1871 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1872 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1873 if (error) 1874 break; 1875 } 1876 1877 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1878 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1879 } else { 1880 /* 1881 * in case it's not a regular file or we're operating 1882 * uncached, do read in the old-fashioned style, 1883 * i.e. explicit read operations 1884 */ 1885 1886 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1887 argsize = sizeof(struct puffs_vnmsg_read); 1888 puffs_msgmem_alloc(argsize + tomove, &park_read, 1889 (void *)&read_msg, 1); 1890 1891 error = 0; 1892 while (uio->uio_resid > 0) { 1893 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1894 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1895 RWARGS(read_msg, ap->a_ioflag, tomove, 1896 uio->uio_offset, ap->a_cred); 1897 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1898 PUFFS_VN_READ, VPTOPNC(vp)); 1899 puffs_msg_setdelta(park_read, tomove); 1900 1901 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1902 NULL, error); 1903 error = checkerr(pmp, error, __func__); 1904 if (error) 1905 break; 1906 1907 if (read_msg->pvnr_resid > tomove) { 1908 puffs_senderr(pmp, PUFFS_ERR_READ, 1909 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1910 error = EPROTO; 1911 break; 1912 } 1913 1914 error = uiomove(read_msg->pvnr_data, 1915 tomove - read_msg->pvnr_resid, uio); 1916 1917 /* 1918 * in case the file is out of juice, resid from 1919 * userspace is != 0. and the error-case is 1920 * quite obvious 1921 */ 1922 if (error || read_msg->pvnr_resid) 1923 break; 1924 } 1925 1926 puffs_msgmem_release(park_read); 1927 } 1928 1929 return error; 1930 } 1931 1932 /* 1933 * XXX: in case of a failure, this leaves uio in a bad state. 1934 * We could theoretically copy the uio and iovecs and "replay" 1935 * them the right amount after the userspace trip, but don't 1936 * bother for now. 1937 */ 1938 int 1939 puffs_vnop_write(void *v) 1940 { 1941 struct vop_write_args /* { 1942 const struct vnodeop_desc *a_desc; 1943 struct vnode *a_vp; 1944 struct uio *a_uio; 1945 int a_ioflag; 1946 kauth_cred_t a_cred; 1947 } */ *ap = v; 1948 PUFFS_MSG_VARS(vn, write); 1949 struct vnode *vp = ap->a_vp; 1950 struct puffs_node *pn = VPTOPP(vp); 1951 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1952 struct uio *uio = ap->a_uio; 1953 size_t tomove, argsize; 1954 off_t oldoff, newoff, origoff; 1955 vsize_t bytelen; 1956 int error, uflags; 1957 int ubcflags; 1958 1959 error = uflags = 0; 1960 write_msg = NULL; 1961 1962 mutex_enter(&pn->pn_sizemtx); 1963 1964 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1965 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1966 1967 /* 1968 * userspace *should* be allowed to control this, 1969 * but with UBC it's a bit unclear how to handle it 1970 */ 1971 if (ap->a_ioflag & IO_APPEND) 1972 uio->uio_offset = vp->v_size; 1973 1974 origoff = uio->uio_offset; 1975 while (uio->uio_resid > 0) { 1976 uflags |= PUFFS_UPDATECTIME; 1977 uflags |= PUFFS_UPDATEMTIME; 1978 oldoff = uio->uio_offset; 1979 bytelen = uio->uio_resid; 1980 1981 newoff = oldoff + bytelen; 1982 if (vp->v_size < newoff) { 1983 uvm_vnp_setwritesize(vp, newoff); 1984 } 1985 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1986 UVM_ADV_RANDOM, ubcflags); 1987 1988 /* 1989 * In case of a ubc_uiomove() error, 1990 * opt to not extend the file at all and 1991 * return an error. Otherwise, if we attempt 1992 * to clear the memory we couldn't fault to, 1993 * we might generate a kernel page fault. 1994 */ 1995 if (vp->v_size < newoff) { 1996 if (error == 0) { 1997 uflags |= PUFFS_UPDATESIZE; 1998 uvm_vnp_setsize(vp, newoff); 1999 } else { 2000 uvm_vnp_setwritesize(vp, vp->v_size); 2001 } 2002 } 2003 if (error) 2004 break; 2005 2006 /* 2007 * If we're writing large files, flush to file server 2008 * every 64k. Otherwise we can very easily exhaust 2009 * kernel and user memory, as the file server cannot 2010 * really keep up with our writing speed. 2011 * 2012 * Note: this does *NOT* honor MNT_ASYNC, because 2013 * that gives userland too much say in the kernel. 2014 */ 2015 if (oldoff >> 16 != uio->uio_offset >> 16) { 2016 mutex_enter(vp->v_interlock); 2017 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2018 uio->uio_offset & ~0xffff, 2019 PGO_CLEANIT | PGO_SYNCIO); 2020 if (error) 2021 break; 2022 } 2023 } 2024 2025 /* synchronous I/O? */ 2026 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2027 mutex_enter(vp->v_interlock); 2028 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2029 round_page(uio->uio_offset), 2030 PGO_CLEANIT | PGO_SYNCIO); 2031 2032 /* write through page cache? */ 2033 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2034 mutex_enter(vp->v_interlock); 2035 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2036 round_page(uio->uio_offset), PGO_CLEANIT); 2037 } 2038 2039 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2040 } else { 2041 /* tomove is non-increasing */ 2042 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2043 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2044 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2045 2046 while (uio->uio_resid > 0) { 2047 /* move data to buffer */ 2048 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2049 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2050 RWARGS(write_msg, ap->a_ioflag, tomove, 2051 uio->uio_offset, ap->a_cred); 2052 error = uiomove(write_msg->pvnr_data, tomove, uio); 2053 if (error) 2054 break; 2055 2056 /* move buffer to userspace */ 2057 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2058 PUFFS_VN_WRITE, VPTOPNC(vp)); 2059 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2060 NULL, error); 2061 error = checkerr(pmp, error, __func__); 2062 if (error) 2063 break; 2064 2065 if (write_msg->pvnr_resid > tomove) { 2066 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2067 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2068 error = EPROTO; 2069 break; 2070 } 2071 2072 /* adjust file size */ 2073 if (vp->v_size < uio->uio_offset) 2074 uvm_vnp_setsize(vp, uio->uio_offset); 2075 2076 /* didn't move everything? bad userspace. bail */ 2077 if (write_msg->pvnr_resid != 0) { 2078 error = EIO; 2079 break; 2080 } 2081 } 2082 puffs_msgmem_release(park_write); 2083 } 2084 2085 mutex_exit(&pn->pn_sizemtx); 2086 return error; 2087 } 2088 2089 int 2090 puffs_vnop_print(void *v) 2091 { 2092 struct vop_print_args /* { 2093 struct vnode *a_vp; 2094 } */ *ap = v; 2095 PUFFS_MSG_VARS(vn, print); 2096 struct vnode *vp = ap->a_vp; 2097 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2098 struct puffs_node *pn = vp->v_data; 2099 int error; 2100 2101 /* kernel portion */ 2102 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2103 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2104 if (vp->v_type == VFIFO) 2105 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2106 printf("\n"); 2107 2108 /* userspace portion */ 2109 if (EXISTSOP(pmp, PRINT)) { 2110 PUFFS_MSG_ALLOC(vn, print); 2111 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2112 PUFFS_VN_PRINT, VPTOPNC(vp)); 2113 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2114 NULL, error); 2115 PUFFS_MSG_RELEASE(print); 2116 } 2117 2118 return 0; 2119 } 2120 2121 int 2122 puffs_vnop_pathconf(void *v) 2123 { 2124 struct vop_pathconf_args /* { 2125 const struct vnodeop_desc *a_desc; 2126 struct vnode *a_vp; 2127 int a_name; 2128 register_t *a_retval; 2129 } */ *ap = v; 2130 PUFFS_MSG_VARS(vn, pathconf); 2131 struct vnode *vp = ap->a_vp; 2132 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2133 int error; 2134 2135 PUFFS_MSG_ALLOC(vn, pathconf); 2136 pathconf_msg->pvnr_name = ap->a_name; 2137 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2138 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2139 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2140 error = checkerr(pmp, error, __func__); 2141 if (!error) 2142 *ap->a_retval = pathconf_msg->pvnr_retval; 2143 PUFFS_MSG_RELEASE(pathconf); 2144 2145 return error; 2146 } 2147 2148 int 2149 puffs_vnop_advlock(void *v) 2150 { 2151 struct vop_advlock_args /* { 2152 const struct vnodeop_desc *a_desc; 2153 struct vnode *a_vp; 2154 void *a_id; 2155 int a_op; 2156 struct flock *a_fl; 2157 int a_flags; 2158 } */ *ap = v; 2159 PUFFS_MSG_VARS(vn, advlock); 2160 struct vnode *vp = ap->a_vp; 2161 struct puffs_node *pn = VPTOPP(vp); 2162 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2163 int error; 2164 2165 if (!EXISTSOP(pmp, ADVLOCK)) 2166 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2167 2168 PUFFS_MSG_ALLOC(vn, advlock); 2169 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2170 sizeof(advlock_msg->pvnr_fl)); 2171 advlock_msg->pvnr_id = ap->a_id; 2172 advlock_msg->pvnr_op = ap->a_op; 2173 advlock_msg->pvnr_flags = ap->a_flags; 2174 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2175 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2176 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2177 error = checkerr(pmp, error, __func__); 2178 PUFFS_MSG_RELEASE(advlock); 2179 2180 return error; 2181 } 2182 2183 int 2184 puffs_vnop_abortop(void *v) 2185 { 2186 struct vop_abortop_args /* { 2187 struct vnode *a_dvp; 2188 struct componentname *a_cnp; 2189 }; */ *ap = v; 2190 PUFFS_MSG_VARS(vn, abortop); 2191 struct vnode *dvp = ap->a_dvp; 2192 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2193 struct componentname *cnp = ap->a_cnp; 2194 2195 if (EXISTSOP(pmp, ABORTOP)) { 2196 PUFFS_MSG_ALLOC(vn, abortop); 2197 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2198 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2199 puffs_msg_setfaf(park_abortop); 2200 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2201 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2202 2203 puffs_msg_enqueue(pmp, park_abortop); 2204 PUFFS_MSG_RELEASE(abortop); 2205 } 2206 2207 return genfs_abortop(v); 2208 } 2209 2210 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2211 2212 /* 2213 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2214 */ 2215 int 2216 puffs_vnop_strategy(void *v) 2217 { 2218 struct vop_strategy_args /* { 2219 const struct vnodeop_desc *a_desc; 2220 struct vnode *a_vp; 2221 struct buf *a_bp; 2222 } */ *ap = v; 2223 PUFFS_MSG_VARS(vn, rw); 2224 struct vnode *vp = ap->a_vp; 2225 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2226 struct puffs_node *pn; 2227 struct buf *bp; 2228 size_t argsize; 2229 size_t tomove, moved; 2230 int error, dofaf, cansleep, dobiodone; 2231 2232 pmp = MPTOPUFFSMP(vp->v_mount); 2233 bp = ap->a_bp; 2234 error = 0; 2235 dofaf = 0; 2236 cansleep = 0; 2237 pn = VPTOPP(vp); 2238 park_rw = NULL; /* explicit */ 2239 dobiodone = 1; 2240 2241 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2242 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2243 ERROUT(EOPNOTSUPP); 2244 2245 /* 2246 * Short-circuit optimization: don't flush buffer in between 2247 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2248 */ 2249 if (pn->pn_stat & PNODE_DYING) { 2250 KASSERT(BUF_ISWRITE(bp)); 2251 bp->b_resid = 0; 2252 goto out; 2253 } 2254 2255 #ifdef DIAGNOSTIC 2256 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2257 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2258 bp->b_bcount); 2259 #endif 2260 2261 /* 2262 * See explanation for the necessity of a FAF in puffs_fsync. 2263 * 2264 * Also, do FAF in case we're suspending. 2265 * See puffs_vfsops.c:pageflush() 2266 */ 2267 if (BUF_ISWRITE(bp)) { 2268 mutex_enter(vp->v_interlock); 2269 if (vp->v_iflag & VI_XLOCK) 2270 dofaf = 1; 2271 if (pn->pn_stat & PNODE_FAF) 2272 dofaf = 1; 2273 mutex_exit(vp->v_interlock); 2274 } 2275 2276 #ifdef DIAGNOSTIC 2277 if (curlwp == uvm.pagedaemon_lwp) 2278 KASSERT(dofaf || BIOASYNC(bp)); 2279 #endif 2280 2281 /* allocate transport structure */ 2282 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2283 argsize = sizeof(struct puffs_vnmsg_rw); 2284 cansleep = (dofaf || (curlwp == updateproc)) ? 0 : 1; 2285 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2286 (void *)&rw_msg, cansleep); 2287 if (error) 2288 goto out; 2289 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2290 2291 /* 2x2 cases: read/write, faf/nofaf */ 2292 if (BUF_ISREAD(bp)) { 2293 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2294 PUFFS_VN_READ, VPTOPNC(vp)); 2295 puffs_msg_setdelta(park_rw, tomove); 2296 if (BIOASYNC(bp)) { 2297 puffs_msg_setcall(park_rw, 2298 puffs_parkdone_asyncbioread, bp); 2299 puffs_msg_enqueue(pmp, park_rw); 2300 dobiodone = 0; 2301 } else { 2302 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2303 NULL, error); 2304 error = checkerr(pmp, error, __func__); 2305 if (error) 2306 goto out; 2307 2308 if (rw_msg->pvnr_resid > tomove) { 2309 puffs_senderr(pmp, PUFFS_ERR_READ, 2310 E2BIG, "resid grew", VPTOPNC(vp)); 2311 ERROUT(EPROTO); 2312 } 2313 2314 moved = tomove - rw_msg->pvnr_resid; 2315 2316 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2317 bp->b_resid = bp->b_bcount - moved; 2318 } 2319 } else { 2320 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2321 PUFFS_VN_WRITE, VPTOPNC(vp)); 2322 /* 2323 * make pages read-only before we write them if we want 2324 * write caching info 2325 */ 2326 if (PUFFS_WCACHEINFO(pmp)) { 2327 struct uvm_object *uobj = &vp->v_uobj; 2328 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2329 struct vm_page *vmp; 2330 int i; 2331 2332 for (i = 0; i < npages; i++) { 2333 vmp= uvm_pageratop((vaddr_t)bp->b_data 2334 + (i << PAGE_SHIFT)); 2335 DPRINTF(("puffs_strategy: write-protecting " 2336 "vp %p page %p, offset %" PRId64"\n", 2337 vp, vmp, vmp->offset)); 2338 mutex_enter(uobj->vmobjlock); 2339 vmp->flags |= PG_RDONLY; 2340 pmap_page_protect(vmp, VM_PROT_READ); 2341 mutex_exit(uobj->vmobjlock); 2342 } 2343 } 2344 2345 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2346 if (dofaf) { 2347 puffs_msg_setfaf(park_rw); 2348 } else if (BIOASYNC(bp)) { 2349 puffs_msg_setcall(park_rw, 2350 puffs_parkdone_asyncbiowrite, bp); 2351 dobiodone = 0; 2352 } 2353 2354 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2355 2356 if (dobiodone == 0) 2357 goto out; 2358 2359 /* 2360 * XXXXXXXX: wrong, but kernel can't survive strategy 2361 * failure currently. Here, have one more X: X. 2362 */ 2363 if (error != ENOMEM) 2364 error = 0; 2365 2366 error = checkerr(pmp, error, __func__); 2367 if (error) 2368 goto out; 2369 2370 if (rw_msg->pvnr_resid > tomove) { 2371 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2372 E2BIG, "resid grew", VPTOPNC(vp)); 2373 ERROUT(EPROTO); 2374 } 2375 2376 /* 2377 * FAF moved everything. Frankly, we don't 2378 * really have a choice. 2379 */ 2380 if (dofaf && error == 0) 2381 moved = tomove; 2382 else 2383 moved = tomove - rw_msg->pvnr_resid; 2384 2385 bp->b_resid = bp->b_bcount - moved; 2386 if (bp->b_resid != 0) { 2387 ERROUT(EIO); 2388 } 2389 } 2390 2391 out: 2392 if (park_rw) 2393 puffs_msgmem_release(park_rw); 2394 2395 if (error) 2396 bp->b_error = error; 2397 2398 if (error || dobiodone) 2399 biodone(bp); 2400 2401 return error; 2402 } 2403 2404 int 2405 puffs_vnop_mmap(void *v) 2406 { 2407 struct vop_mmap_args /* { 2408 const struct vnodeop_desc *a_desc; 2409 struct vnode *a_vp; 2410 vm_prot_t a_prot; 2411 kauth_cred_t a_cred; 2412 } */ *ap = v; 2413 PUFFS_MSG_VARS(vn, mmap); 2414 struct vnode *vp = ap->a_vp; 2415 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2416 int error; 2417 2418 if (!PUFFS_USE_PAGECACHE(pmp)) 2419 return genfs_eopnotsupp(v); 2420 2421 if (EXISTSOP(pmp, MMAP)) { 2422 PUFFS_MSG_ALLOC(vn, mmap); 2423 mmap_msg->pvnr_prot = ap->a_prot; 2424 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2425 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2426 PUFFS_VN_MMAP, VPTOPNC(vp)); 2427 2428 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2429 error = checkerr(pmp, error, __func__); 2430 PUFFS_MSG_RELEASE(mmap); 2431 } else { 2432 error = genfs_mmap(v); 2433 } 2434 2435 return error; 2436 } 2437 2438 2439 /* 2440 * The rest don't get a free trip to userspace and back, they 2441 * have to stay within the kernel. 2442 */ 2443 2444 /* 2445 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2446 * well, maybe somehow, somewhere, some day .... 2447 */ 2448 int 2449 puffs_vnop_bmap(void *v) 2450 { 2451 struct vop_bmap_args /* { 2452 const struct vnodeop_desc *a_desc; 2453 struct vnode *a_vp; 2454 daddr_t a_bn; 2455 struct vnode **a_vpp; 2456 daddr_t *a_bnp; 2457 int *a_runp; 2458 } */ *ap = v; 2459 struct puffs_mount *pmp; 2460 2461 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2462 2463 if (ap->a_vpp) 2464 *ap->a_vpp = ap->a_vp; 2465 if (ap->a_bnp) 2466 *ap->a_bnp = ap->a_bn; 2467 if (ap->a_runp) 2468 *ap->a_runp 2469 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2470 2471 return 0; 2472 } 2473 2474 /* 2475 * Handle getpages faults in puffs. We let genfs_getpages() do most 2476 * of the dirty work, but we come in this route to do accounting tasks. 2477 * If the user server has specified functions for cache notifications 2478 * about reads and/or writes, we record which type of operation we got, 2479 * for which page range, and proceed to issue a FAF notification to the 2480 * server about it. 2481 */ 2482 int 2483 puffs_vnop_getpages(void *v) 2484 { 2485 struct vop_getpages_args /* { 2486 const struct vnodeop_desc *a_desc; 2487 struct vnode *a_vp; 2488 voff_t a_offset; 2489 struct vm_page **a_m; 2490 int *a_count; 2491 int a_centeridx; 2492 vm_prot_t a_access_type; 2493 int a_advice; 2494 int a_flags; 2495 } */ *ap = v; 2496 struct puffs_mount *pmp; 2497 struct puffs_node *pn; 2498 struct vnode *vp; 2499 struct vm_page **pgs; 2500 struct puffs_cacheinfo *pcinfo = NULL; 2501 struct puffs_cacherun *pcrun; 2502 void *parkmem = NULL; 2503 size_t runsizes; 2504 int i, npages, si, streakon; 2505 int error, locked, write; 2506 2507 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2508 npages = *ap->a_count; 2509 pgs = ap->a_m; 2510 vp = ap->a_vp; 2511 pn = vp->v_data; 2512 locked = (ap->a_flags & PGO_LOCKED) != 0; 2513 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2514 2515 /* ccg xnaht - gets Wuninitialized wrong */ 2516 pcrun = NULL; 2517 runsizes = 0; 2518 2519 /* 2520 * Check that we aren't trying to fault in pages which our file 2521 * server doesn't know about. This happens if we extend a file by 2522 * skipping some pages and later try to fault in pages which 2523 * are between pn_serversize and vp_size. This check optimizes 2524 * away the common case where a file is being extended. 2525 */ 2526 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2527 struct vattr va; 2528 2529 /* try again later when we can block */ 2530 if (locked) 2531 ERROUT(EBUSY); 2532 2533 mutex_exit(vp->v_interlock); 2534 vattr_null(&va); 2535 va.va_size = vp->v_size; 2536 error = dosetattr(vp, &va, FSCRED, 0); 2537 if (error) 2538 ERROUT(error); 2539 mutex_enter(vp->v_interlock); 2540 } 2541 2542 if (write && PUFFS_WCACHEINFO(pmp)) { 2543 #ifdef notnowjohn 2544 /* allocate worst-case memory */ 2545 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2546 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2547 locked ? KM_NOSLEEP : KM_SLEEP); 2548 2549 /* 2550 * can't block if we're locked and can't mess up caching 2551 * information for fs server. so come back later, please 2552 */ 2553 if (pcinfo == NULL) 2554 ERROUT(ENOMEM); 2555 2556 parkmem = puffs_park_alloc(locked == 0); 2557 if (parkmem == NULL) 2558 ERROUT(ENOMEM); 2559 2560 pcrun = pcinfo->pcache_runs; 2561 #else 2562 (void)parkmem; 2563 #endif 2564 } 2565 2566 error = genfs_getpages(v); 2567 if (error) 2568 goto out; 2569 2570 if (PUFFS_WCACHEINFO(pmp) == 0) 2571 goto out; 2572 2573 /* 2574 * Let's see whose fault it was and inform the user server of 2575 * possibly read/written pages. Map pages from read faults 2576 * strictly read-only, since otherwise we might miss info on 2577 * when the page is actually write-faulted to. 2578 */ 2579 if (!locked) 2580 mutex_enter(vp->v_uobj.vmobjlock); 2581 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2582 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2583 if (streakon && write) { 2584 streakon = 0; 2585 pcrun[si].pcache_runend 2586 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2587 si++; 2588 } 2589 continue; 2590 } 2591 if (streakon == 0 && write) { 2592 streakon = 1; 2593 pcrun[si].pcache_runstart = pgs[i]->offset; 2594 } 2595 2596 if (!write) 2597 pgs[i]->flags |= PG_RDONLY; 2598 } 2599 /* was the last page part of our streak? */ 2600 if (streakon) { 2601 pcrun[si].pcache_runend 2602 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2603 si++; 2604 } 2605 if (!locked) 2606 mutex_exit(vp->v_uobj.vmobjlock); 2607 2608 KASSERT(si <= (npages / 2) + 1); 2609 2610 #ifdef notnowjohn 2611 /* send results to userspace */ 2612 if (write) 2613 puffs_cacheop(pmp, parkmem, pcinfo, 2614 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2615 #endif 2616 2617 out: 2618 if (error) { 2619 if (pcinfo != NULL) 2620 kmem_free(pcinfo, 2621 sizeof(struct puffs_cacheinfo) + runsizes); 2622 #ifdef notnowjohn 2623 if (parkmem != NULL) 2624 puffs_park_release(parkmem, 1); 2625 #endif 2626 } 2627 2628 return error; 2629 } 2630 2631 /* 2632 * Extended attribute support. 2633 */ 2634 2635 int 2636 puffs_vnop_getextattr(void *v) 2637 { 2638 struct vop_getextattr_args /* 2639 struct vnode *a_vp; 2640 int a_attrnamespace; 2641 const char *a_name; 2642 struct uio *a_uio; 2643 size_t *a_size; 2644 kauth_cred_t a_cred; 2645 }; */ *ap = v; 2646 PUFFS_MSG_VARS(vn, getextattr); 2647 struct vnode *vp = ap->a_vp; 2648 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2649 int attrnamespace = ap->a_attrnamespace; 2650 const char *name = ap->a_name; 2651 struct uio *uio = ap->a_uio; 2652 size_t *sizep = ap->a_size; 2653 size_t tomove, resid; 2654 int error; 2655 2656 if (uio) 2657 resid = uio->uio_resid; 2658 else 2659 resid = 0; 2660 2661 tomove = PUFFS_TOMOVE(resid, pmp); 2662 if (tomove != resid) { 2663 error = E2BIG; 2664 goto out; 2665 } 2666 2667 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2668 &park_getextattr, (void *)&getextattr_msg, 1); 2669 2670 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2671 strlcpy(getextattr_msg->pvnr_attrname, name, 2672 sizeof(getextattr_msg->pvnr_attrname)); 2673 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2674 if (sizep) 2675 getextattr_msg->pvnr_datasize = 1; 2676 getextattr_msg->pvnr_resid = tomove; 2677 2678 puffs_msg_setinfo(park_getextattr, 2679 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2680 puffs_msg_setdelta(park_getextattr, tomove); 2681 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2682 2683 error = checkerr(pmp, error, __func__); 2684 if (error) 2685 goto out; 2686 2687 resid = getextattr_msg->pvnr_resid; 2688 if (resid > tomove) { 2689 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2690 "resid grew", VPTOPNC(vp)); 2691 error = EPROTO; 2692 goto out; 2693 } 2694 2695 if (sizep) 2696 *sizep = getextattr_msg->pvnr_datasize; 2697 if (uio) 2698 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2699 2700 out: 2701 PUFFS_MSG_RELEASE(getextattr); 2702 return error; 2703 } 2704 2705 int 2706 puffs_vnop_setextattr(void *v) 2707 { 2708 struct vop_setextattr_args /* { 2709 struct vnode *a_vp; 2710 int a_attrnamespace; 2711 const char *a_name; 2712 struct uio *a_uio; 2713 kauth_cred_t a_cred; 2714 }; */ *ap = v; 2715 PUFFS_MSG_VARS(vn, setextattr); 2716 struct vnode *vp = ap->a_vp; 2717 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2718 int attrnamespace = ap->a_attrnamespace; 2719 const char *name = ap->a_name; 2720 struct uio *uio = ap->a_uio; 2721 size_t tomove, resid; 2722 int error; 2723 2724 if (uio) 2725 resid = uio->uio_resid; 2726 else 2727 resid = 0; 2728 2729 tomove = PUFFS_TOMOVE(resid, pmp); 2730 if (tomove != resid) { 2731 error = E2BIG; 2732 goto out; 2733 } 2734 2735 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2736 &park_setextattr, (void *)&setextattr_msg, 1); 2737 2738 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2739 strlcpy(setextattr_msg->pvnr_attrname, name, 2740 sizeof(setextattr_msg->pvnr_attrname)); 2741 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2742 setextattr_msg->pvnr_resid = tomove; 2743 2744 if (uio) { 2745 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2746 if (error) 2747 goto out; 2748 } 2749 2750 puffs_msg_setinfo(park_setextattr, 2751 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 2752 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 2753 2754 error = checkerr(pmp, error, __func__); 2755 if (error) 2756 goto out; 2757 2758 if (setextattr_msg->pvnr_resid != 0) 2759 error = EIO; 2760 2761 out: 2762 PUFFS_MSG_RELEASE(setextattr); 2763 2764 return error; 2765 } 2766 2767 int 2768 puffs_vnop_listextattr(void *v) 2769 { 2770 struct vop_listextattr_args /* { 2771 struct vnode *a_vp; 2772 int a_attrnamespace; 2773 struct uio *a_uio; 2774 size_t *a_size; 2775 int a_flag, 2776 kauth_cred_t a_cred; 2777 }; */ *ap = v; 2778 PUFFS_MSG_VARS(vn, listextattr); 2779 struct vnode *vp = ap->a_vp; 2780 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2781 int attrnamespace = ap->a_attrnamespace; 2782 struct uio *uio = ap->a_uio; 2783 size_t *sizep = ap->a_size; 2784 int flag = ap->a_flag; 2785 size_t tomove, resid; 2786 int error; 2787 2788 if (uio) 2789 resid = uio->uio_resid; 2790 else 2791 resid = 0; 2792 2793 tomove = PUFFS_TOMOVE(resid, pmp); 2794 if (tomove != resid) { 2795 error = E2BIG; 2796 goto out; 2797 } 2798 2799 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 2800 &park_listextattr, (void *)&listextattr_msg, 1); 2801 2802 listextattr_msg->pvnr_attrnamespace = attrnamespace; 2803 listextattr_msg->pvnr_flag = flag; 2804 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 2805 listextattr_msg->pvnr_resid = tomove; 2806 if (sizep) 2807 listextattr_msg->pvnr_datasize = 1; 2808 2809 puffs_msg_setinfo(park_listextattr, 2810 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 2811 puffs_msg_setdelta(park_listextattr, tomove); 2812 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 2813 2814 error = checkerr(pmp, error, __func__); 2815 if (error) 2816 goto out; 2817 2818 resid = listextattr_msg->pvnr_resid; 2819 if (resid > tomove) { 2820 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 2821 "resid grew", VPTOPNC(vp)); 2822 error = EPROTO; 2823 goto out; 2824 } 2825 2826 if (sizep) 2827 *sizep = listextattr_msg->pvnr_datasize; 2828 if (uio) 2829 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 2830 2831 out: 2832 PUFFS_MSG_RELEASE(listextattr); 2833 return error; 2834 } 2835 2836 int 2837 puffs_vnop_deleteextattr(void *v) 2838 { 2839 struct vop_deleteextattr_args /* { 2840 struct vnode *a_vp; 2841 int a_attrnamespace; 2842 const char *a_name; 2843 kauth_cred_t a_cred; 2844 }; */ *ap = v; 2845 PUFFS_MSG_VARS(vn, deleteextattr); 2846 struct vnode *vp = ap->a_vp; 2847 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2848 int attrnamespace = ap->a_attrnamespace; 2849 const char *name = ap->a_name; 2850 int error; 2851 2852 PUFFS_MSG_ALLOC(vn, deleteextattr); 2853 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 2854 strlcpy(deleteextattr_msg->pvnr_attrname, name, 2855 sizeof(deleteextattr_msg->pvnr_attrname)); 2856 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 2857 2858 puffs_msg_setinfo(park_deleteextattr, 2859 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 2860 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 2861 vp->v_data, NULL, error); 2862 2863 error = checkerr(pmp, error, __func__); 2864 2865 PUFFS_MSG_RELEASE(deleteextattr); 2866 return error; 2867 } 2868 2869 /* 2870 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2871 * FAF update information for the puffs node first. 2872 */ 2873 int 2874 puffs_vnop_spec_read(void *v) 2875 { 2876 struct vop_read_args /* { 2877 const struct vnodeop_desc *a_desc; 2878 struct vnode *a_vp; 2879 struct uio *a_uio; 2880 int a_ioflag; 2881 kauth_cred_t a_cred; 2882 } */ *ap = v; 2883 2884 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2885 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2886 } 2887 2888 int 2889 puffs_vnop_spec_write(void *v) 2890 { 2891 struct vop_write_args /* { 2892 const struct vnodeop_desc *a_desc; 2893 struct vnode *a_vp; 2894 struct uio *a_uio; 2895 int a_ioflag; 2896 kauth_cred_t a_cred; 2897 } */ *ap = v; 2898 2899 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2900 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2901 } 2902 2903 int 2904 puffs_vnop_fifo_read(void *v) 2905 { 2906 struct vop_read_args /* { 2907 const struct vnodeop_desc *a_desc; 2908 struct vnode *a_vp; 2909 struct uio *a_uio; 2910 int a_ioflag; 2911 kauth_cred_t a_cred; 2912 } */ *ap = v; 2913 2914 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2915 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2916 } 2917 2918 int 2919 puffs_vnop_fifo_write(void *v) 2920 { 2921 struct vop_write_args /* { 2922 const struct vnodeop_desc *a_desc; 2923 struct vnode *a_vp; 2924 struct uio *a_uio; 2925 int a_ioflag; 2926 kauth_cred_t a_cred; 2927 } */ *ap = v; 2928 2929 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2930 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2931 } 2932
Indexes created Wed Oct 01 07:09:59 GMT 2025