puffs_vnops.c revision 1.159
1 /* $NetBSD: puffs_vnops.c,v 1.159 2011/10/18 15:39:09 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 1.159 2011/10/18 15:39:09 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 int puffs_vnop_lookup(void *); 54 int puffs_vnop_create(void *); 55 int puffs_vnop_access(void *); 56 int puffs_vnop_mknod(void *); 57 int puffs_vnop_open(void *); 58 int puffs_vnop_close(void *); 59 int puffs_vnop_getattr(void *); 60 int puffs_vnop_setattr(void *); 61 int puffs_vnop_reclaim(void *); 62 int puffs_vnop_readdir(void *); 63 int puffs_vnop_poll(void *); 64 int puffs_vnop_fsync(void *); 65 int puffs_vnop_seek(void *); 66 int puffs_vnop_remove(void *); 67 int puffs_vnop_mkdir(void *); 68 int puffs_vnop_rmdir(void *); 69 int puffs_vnop_link(void *); 70 int puffs_vnop_readlink(void *); 71 int puffs_vnop_symlink(void *); 72 int puffs_vnop_rename(void *); 73 int puffs_vnop_read(void *); 74 int puffs_vnop_write(void *); 75 int puffs_vnop_fcntl(void *); 76 int puffs_vnop_ioctl(void *); 77 int puffs_vnop_inactive(void *); 78 int puffs_vnop_print(void *); 79 int puffs_vnop_pathconf(void *); 80 int puffs_vnop_advlock(void *); 81 int puffs_vnop_strategy(void *); 82 int puffs_vnop_bmap(void *); 83 int puffs_vnop_mmap(void *); 84 int puffs_vnop_getpages(void *); 85 int puffs_vnop_abortop(void *); 86 int puffs_vnop_getextattr(void *); 87 int puffs_vnop_setextattr(void *); 88 int puffs_vnop_listextattr(void *); 89 int puffs_vnop_deleteextattr(void *); 90 91 int puffs_vnop_spec_read(void *); 92 int puffs_vnop_spec_write(void *); 93 int puffs_vnop_fifo_read(void *); 94 int puffs_vnop_fifo_write(void *); 95 96 int puffs_vnop_checkop(void *); 97 98 #define puffs_vnop_lock genfs_lock 99 #define puffs_vnop_unlock genfs_unlock 100 #define puffs_vnop_islocked genfs_islocked 101 102 int (**puffs_vnodeop_p)(void *); 103 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 104 { &vop_default_desc, vn_default_error }, 105 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 106 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 107 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 108 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 109 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 110 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 111 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 112 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 113 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 114 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 115 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 116 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 117 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 118 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 119 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 120 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 121 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 122 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 123 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 124 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 125 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 126 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 127 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 128 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 129 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 130 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 131 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 132 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 133 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 134 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 135 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 136 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 137 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 138 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 139 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 140 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 141 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 142 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 143 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 144 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 145 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 146 #if 0 147 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 148 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 149 #endif 150 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 151 { NULL, NULL } 152 }; 153 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 154 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 155 156 157 int (**puffs_specop_p)(void *); 158 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 161 { &vop_create_desc, spec_create }, /* genfs_badop */ 162 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 163 { &vop_open_desc, spec_open }, /* spec_open */ 164 { &vop_close_desc, spec_close }, /* spec_close */ 165 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 166 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 167 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 168 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 169 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 170 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 171 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 172 { &vop_poll_desc, spec_poll }, /* spec_poll */ 173 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 174 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 175 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 176 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 177 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 178 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 179 { &vop_link_desc, spec_link }, /* genfs_badop */ 180 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 181 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 182 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 183 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 184 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 185 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 186 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 187 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 188 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 189 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 190 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 191 { &vop_bmap_desc, spec_bmap }, /* dummy */ 192 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 193 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 194 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 195 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 196 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 199 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 200 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 201 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 202 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 203 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 204 #if 0 205 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 206 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 207 #endif 208 { NULL, NULL } 209 }; 210 const struct vnodeopv_desc puffs_specop_opv_desc = 211 { &puffs_specop_p, puffs_specop_entries }; 212 213 214 int (**puffs_fifoop_p)(void *); 215 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 216 { &vop_default_desc, vn_default_error }, 217 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 218 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 219 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 220 { &vop_open_desc, vn_fifo_bypass }, /* open */ 221 { &vop_close_desc, vn_fifo_bypass }, /* close */ 222 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 223 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 224 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 225 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 226 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 227 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 228 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 229 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 230 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 231 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 232 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 233 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 234 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 235 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 236 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 237 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 238 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 239 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 241 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 245 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 246 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 247 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 248 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 249 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 251 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 252 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 253 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 254 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 255 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 256 #if 0 257 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 258 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 259 #endif 260 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 261 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 262 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 263 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 264 { NULL, NULL } 265 }; 266 const struct vnodeopv_desc puffs_fifoop_opv_desc = 267 { &puffs_fifoop_p, puffs_fifoop_entries }; 268 269 270 /* "real" vnode operations */ 271 int (**puffs_msgop_p)(void *); 272 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 273 { &vop_default_desc, vn_default_error }, 274 { &vop_create_desc, puffs_vnop_create }, /* create */ 275 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 276 { &vop_open_desc, puffs_vnop_open }, /* open */ 277 { &vop_close_desc, puffs_vnop_close }, /* close */ 278 { &vop_access_desc, puffs_vnop_access }, /* access */ 279 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 280 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 281 { &vop_read_desc, puffs_vnop_read }, /* read */ 282 { &vop_write_desc, puffs_vnop_write }, /* write */ 283 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 284 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 285 { &vop_link_desc, puffs_vnop_link }, /* link */ 286 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 287 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 288 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 289 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 290 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 291 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 292 { &vop_print_desc, puffs_vnop_print }, /* print */ 293 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 294 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 295 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 296 { NULL, NULL } 297 }; 298 const struct vnodeopv_desc puffs_msgop_opv_desc = 299 { &puffs_msgop_p, puffs_msgop_entries }; 300 301 302 #define ERROUT(err) \ 303 do { \ 304 error = err; \ 305 goto out; \ 306 } while (/*CONSTCOND*/0) 307 308 /* 309 * This is a generic vnode operation handler. It checks if the necessary 310 * operations for the called vnode operation are implemented by userspace 311 * and either returns a dummy return value or proceeds to call the real 312 * vnode operation from puffs_msgop_v. 313 * 314 * XXX: this should described elsewhere and autogenerated, the complexity 315 * of the vnode operations vectors and their interrelationships is also 316 * getting a bit out of hand. Another problem is that we need this same 317 * information in the fs server code, so keeping the two in sync manually 318 * is not a viable (long term) plan. 319 */ 320 321 /* not supported, handle locking protocol */ 322 #define CHECKOP_NOTSUPP(op) \ 323 case VOP_##op##_DESCOFFSET: \ 324 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 325 return genfs_eopnotsupp(v); \ 326 break 327 328 /* always succeed, no locking */ 329 #define CHECKOP_SUCCESS(op) \ 330 case VOP_##op##_DESCOFFSET: \ 331 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 332 return 0; \ 333 break 334 335 int 336 puffs_vnop_checkop(void *v) 337 { 338 struct vop_generic_args /* { 339 struct vnodeop_desc *a_desc; 340 spooky mystery contents; 341 } */ *ap = v; 342 struct vnodeop_desc *desc = ap->a_desc; 343 struct puffs_mount *pmp; 344 struct vnode *vp; 345 int offset, rv; 346 347 offset = ap->a_desc->vdesc_vp_offsets[0]; 348 #ifdef DIAGNOSTIC 349 if (offset == VDESC_NO_OFFSET) 350 panic("puffs_checkop: no vnode, why did you call me?"); 351 #endif 352 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 353 pmp = MPTOPUFFSMP(vp->v_mount); 354 355 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 356 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 357 358 if (!ALLOPS(pmp)) { 359 switch (desc->vdesc_offset) { 360 CHECKOP_NOTSUPP(CREATE); 361 CHECKOP_NOTSUPP(MKNOD); 362 CHECKOP_NOTSUPP(GETATTR); 363 CHECKOP_NOTSUPP(SETATTR); 364 CHECKOP_NOTSUPP(READ); 365 CHECKOP_NOTSUPP(WRITE); 366 CHECKOP_NOTSUPP(FCNTL); 367 CHECKOP_NOTSUPP(IOCTL); 368 CHECKOP_NOTSUPP(REMOVE); 369 CHECKOP_NOTSUPP(LINK); 370 CHECKOP_NOTSUPP(RENAME); 371 CHECKOP_NOTSUPP(MKDIR); 372 CHECKOP_NOTSUPP(RMDIR); 373 CHECKOP_NOTSUPP(SYMLINK); 374 CHECKOP_NOTSUPP(READDIR); 375 CHECKOP_NOTSUPP(READLINK); 376 CHECKOP_NOTSUPP(PRINT); 377 CHECKOP_NOTSUPP(PATHCONF); 378 CHECKOP_NOTSUPP(GETEXTATTR); 379 CHECKOP_NOTSUPP(SETEXTATTR); 380 CHECKOP_NOTSUPP(LISTEXTATTR); 381 CHECKOP_NOTSUPP(DELETEEXTATTR); 382 383 CHECKOP_SUCCESS(ACCESS); 384 CHECKOP_SUCCESS(CLOSE); 385 CHECKOP_SUCCESS(SEEK); 386 387 case VOP_GETPAGES_DESCOFFSET: 388 if (!EXISTSOP(pmp, READ)) 389 return genfs_eopnotsupp(v); 390 break; 391 392 default: 393 panic("puffs_checkop: unhandled vnop %d", 394 desc->vdesc_offset); 395 } 396 } 397 398 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 399 400 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 401 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 402 403 return rv; 404 } 405 406 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 407 struct componentname *); 408 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 409 struct componentname *); 410 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 411 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 412 static int flushvncache(struct vnode *, off_t, off_t, bool); 413 414 415 #define PUFFS_ABORT_LOOKUP 1 416 #define PUFFS_ABORT_CREATE 2 417 #define PUFFS_ABORT_MKNOD 3 418 #define PUFFS_ABORT_MKDIR 4 419 #define PUFFS_ABORT_SYMLINK 5 420 421 /* 422 * Press the pani^Wabort button! Kernel resource allocation failed. 423 */ 424 static void 425 puffs_abortbutton(struct puffs_mount *pmp, int what, 426 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 427 { 428 429 switch (what) { 430 case PUFFS_ABORT_CREATE: 431 case PUFFS_ABORT_MKNOD: 432 case PUFFS_ABORT_SYMLINK: 433 callremove(pmp, dck, ck, cnp); 434 break; 435 case PUFFS_ABORT_MKDIR: 436 callrmdir(pmp, dck, ck, cnp); 437 break; 438 } 439 440 callinactive(pmp, ck, 0); 441 callreclaim(pmp, ck); 442 } 443 444 /* 445 * Begin vnode operations. 446 * 447 * A word from the keymaster about locks: generally we don't want 448 * to use the vnode locks at all: it creates an ugly dependency between 449 * the userlandia file server and the kernel. But we'll play along with 450 * the kernel vnode locks for now. However, even currently we attempt 451 * to release locks as early as possible. This is possible for some 452 * operations which a) don't need a locked vnode after the userspace op 453 * and b) return with the vnode unlocked. Theoretically we could 454 * unlock-do op-lock for others and order the graph in userspace, but I 455 * don't want to think of the consequences for the time being. 456 */ 457 458 int 459 puffs_vnop_lookup(void *v) 460 { 461 struct vop_lookup_args /* { 462 const struct vnodeop_desc *a_desc; 463 struct vnode *a_dvp; 464 struct vnode **a_vpp; 465 struct componentname *a_cnp; 466 } */ *ap = v; 467 PUFFS_MSG_VARS(vn, lookup); 468 struct puffs_mount *pmp; 469 struct componentname *cnp; 470 struct vnode *vp, *dvp; 471 struct puffs_node *dpn; 472 int isdot; 473 int error; 474 475 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 476 cnp = ap->a_cnp; 477 dvp = ap->a_dvp; 478 *ap->a_vpp = NULL; 479 480 /* r/o fs? we check create later to handle EEXIST */ 481 if ((cnp->cn_flags & ISLASTCN) 482 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 483 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 484 return EROFS; 485 486 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 487 488 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 489 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 490 491 /* 492 * Check if someone fed it into the cache 493 */ 494 if (PUFFS_USE_NAMECACHE(pmp)) { 495 error = cache_lookup(dvp, ap->a_vpp, cnp); 496 497 if (error >= 0) 498 return error; 499 } 500 501 if (isdot) { 502 /* deal with rename lookup semantics */ 503 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 504 return EISDIR; 505 506 vp = ap->a_dvp; 507 vref(vp); 508 *ap->a_vpp = vp; 509 return 0; 510 } 511 512 PUFFS_MSG_ALLOC(vn, lookup); 513 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 514 cnp, PUFFS_USE_FULLPNBUF(pmp)); 515 516 if (cnp->cn_flags & ISDOTDOT) 517 VOP_UNLOCK(dvp); 518 519 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 520 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 521 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 522 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 523 524 /* 525 * In case of error, there is no new vnode to play with, so be 526 * happy with the NULL value given to vpp in the beginning. 527 * Also, check if this really was an error or the target was not 528 * present. Either treat it as a non-error for CREATE/RENAME or 529 * enter the component into the negative name cache (if desired). 530 */ 531 if (error) { 532 error = checkerr(pmp, error, __func__); 533 if (error == ENOENT) { 534 /* don't allow to create files on r/o fs */ 535 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 536 && cnp->cn_nameiop == CREATE) { 537 error = EROFS; 538 539 /* adjust values if we are creating */ 540 } else if ((cnp->cn_flags & ISLASTCN) 541 && (cnp->cn_nameiop == CREATE 542 || cnp->cn_nameiop == RENAME)) { 543 error = EJUSTRETURN; 544 545 /* save negative cache entry */ 546 } else { 547 if ((cnp->cn_flags & MAKEENTRY) 548 && PUFFS_USE_NAMECACHE(pmp)) 549 cache_enter(dvp, NULL, cnp); 550 } 551 } 552 goto out; 553 } 554 555 /* 556 * Check that we don't get our parent node back, that would cause 557 * a pretty obvious deadlock. 558 */ 559 dpn = dvp->v_data; 560 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 561 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 562 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 563 error = EPROTO; 564 goto out; 565 } 566 567 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 568 if (error == PUFFS_NOSUCHCOOKIE) { 569 error = puffs_getvnode(dvp->v_mount, 570 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 571 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 572 if (error) { 573 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 574 lookup_msg->pvnr_newnode, ap->a_cnp); 575 goto out; 576 } 577 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 578 } else if (error) { 579 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 580 lookup_msg->pvnr_newnode, ap->a_cnp); 581 goto out; 582 } 583 584 *ap->a_vpp = vp; 585 586 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 587 cache_enter(dvp, vp, cnp); 588 589 /* XXX */ 590 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 591 cnp->cn_flags &= ~REQUIREDIR; 592 if (lookup_msg->pvnr_cn.pkcn_consume) 593 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 594 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 595 596 out: 597 if (cnp->cn_flags & ISDOTDOT) 598 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 599 600 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 601 PUFFS_MSG_RELEASE(lookup); 602 return error; 603 } 604 605 #define REFPN_AND_UNLOCKVP(a, b) \ 606 do { \ 607 mutex_enter(&b->pn_mtx); \ 608 puffs_referencenode(b); \ 609 mutex_exit(&b->pn_mtx); \ 610 VOP_UNLOCK(a); \ 611 } while (/*CONSTCOND*/0) 612 613 #define REFPN(b) \ 614 do { \ 615 mutex_enter(&b->pn_mtx); \ 616 puffs_referencenode(b); \ 617 mutex_exit(&b->pn_mtx); \ 618 } while (/*CONSTCOND*/0) 619 620 #define RELEPN_AND_VP(a, b) \ 621 do { \ 622 puffs_releasenode(b); \ 623 vrele(a); \ 624 } while (/*CONSTCOND*/0) 625 626 int 627 puffs_vnop_create(void *v) 628 { 629 struct vop_create_args /* { 630 const struct vnodeop_desc *a_desc; 631 struct vnode *a_dvp; 632 struct vnode **a_vpp; 633 struct componentname *a_cnp; 634 struct vattr *a_vap; 635 } */ *ap = v; 636 PUFFS_MSG_VARS(vn, create); 637 struct vnode *dvp = ap->a_dvp; 638 struct puffs_node *dpn = VPTOPP(dvp); 639 struct componentname *cnp = ap->a_cnp; 640 struct mount *mp = dvp->v_mount; 641 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 642 int error; 643 644 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 645 dvp, ap->a_cnp->cn_nameptr)); 646 647 PUFFS_MSG_ALLOC(vn, create); 648 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 649 cnp, PUFFS_USE_FULLPNBUF(pmp)); 650 create_msg->pvnr_va = *ap->a_vap; 651 puffs_msg_setinfo(park_create, PUFFSOP_VN, 652 PUFFS_VN_CREATE, VPTOPNC(dvp)); 653 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 654 655 error = checkerr(pmp, error, __func__); 656 if (error) 657 goto out; 658 659 error = puffs_newnode(mp, dvp, ap->a_vpp, 660 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 661 if (error) 662 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 663 create_msg->pvnr_newnode, cnp); 664 665 out: 666 vput(dvp); 667 668 DPRINTF(("puffs_create: return %d\n", error)); 669 PUFFS_MSG_RELEASE(create); 670 return error; 671 } 672 673 int 674 puffs_vnop_mknod(void *v) 675 { 676 struct vop_mknod_args /* { 677 const struct vnodeop_desc *a_desc; 678 struct vnode *a_dvp; 679 struct vnode **a_vpp; 680 struct componentname *a_cnp; 681 struct vattr *a_vap; 682 } */ *ap = v; 683 PUFFS_MSG_VARS(vn, mknod); 684 struct vnode *dvp = ap->a_dvp; 685 struct puffs_node *dpn = VPTOPP(dvp); 686 struct componentname *cnp = ap->a_cnp; 687 struct mount *mp = dvp->v_mount; 688 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 689 int error; 690 691 PUFFS_MSG_ALLOC(vn, mknod); 692 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 693 cnp, PUFFS_USE_FULLPNBUF(pmp)); 694 mknod_msg->pvnr_va = *ap->a_vap; 695 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 696 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 697 698 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 699 700 error = checkerr(pmp, error, __func__); 701 if (error) 702 goto out; 703 704 error = puffs_newnode(mp, dvp, ap->a_vpp, 705 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 706 ap->a_vap->va_rdev); 707 if (error) 708 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 709 mknod_msg->pvnr_newnode, cnp); 710 711 out: 712 vput(dvp); 713 PUFFS_MSG_RELEASE(mknod); 714 return error; 715 } 716 717 int 718 puffs_vnop_open(void *v) 719 { 720 struct vop_open_args /* { 721 const struct vnodeop_desc *a_desc; 722 struct vnode *a_vp; 723 int a_mode; 724 kauth_cred_t a_cred; 725 } */ *ap = v; 726 PUFFS_MSG_VARS(vn, open); 727 struct vnode *vp = ap->a_vp; 728 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 729 int mode = ap->a_mode; 730 int error; 731 732 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 733 734 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 735 ERROUT(EROFS); 736 737 if (!EXISTSOP(pmp, OPEN)) 738 ERROUT(0); 739 740 PUFFS_MSG_ALLOC(vn, open); 741 open_msg->pvnr_mode = mode; 742 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 743 puffs_msg_setinfo(park_open, PUFFSOP_VN, 744 PUFFS_VN_OPEN, VPTOPNC(vp)); 745 746 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 747 error = checkerr(pmp, error, __func__); 748 749 out: 750 DPRINTF(("puffs_open: returning %d\n", error)); 751 PUFFS_MSG_RELEASE(open); 752 return error; 753 } 754 755 int 756 puffs_vnop_close(void *v) 757 { 758 struct vop_close_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_vp; 761 int a_fflag; 762 kauth_cred_t a_cred; 763 } */ *ap = v; 764 PUFFS_MSG_VARS(vn, close); 765 struct vnode *vp = ap->a_vp; 766 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 767 768 PUFFS_MSG_ALLOC(vn, close); 769 puffs_msg_setfaf(park_close); 770 close_msg->pvnr_fflag = ap->a_fflag; 771 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 772 puffs_msg_setinfo(park_close, PUFFSOP_VN, 773 PUFFS_VN_CLOSE, VPTOPNC(vp)); 774 775 puffs_msg_enqueue(pmp, park_close); 776 PUFFS_MSG_RELEASE(close); 777 return 0; 778 } 779 780 int 781 puffs_vnop_access(void *v) 782 { 783 struct vop_access_args /* { 784 const struct vnodeop_desc *a_desc; 785 struct vnode *a_vp; 786 int a_mode; 787 kauth_cred_t a_cred; 788 } */ *ap = v; 789 PUFFS_MSG_VARS(vn, access); 790 struct vnode *vp = ap->a_vp; 791 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 792 int mode = ap->a_mode; 793 int error; 794 795 if (mode & VWRITE) { 796 switch (vp->v_type) { 797 case VDIR: 798 case VLNK: 799 case VREG: 800 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 801 || !EXISTSOP(pmp, WRITE)) 802 return EROFS; 803 break; 804 default: 805 break; 806 } 807 } 808 809 if (!EXISTSOP(pmp, ACCESS)) 810 return 0; 811 812 PUFFS_MSG_ALLOC(vn, access); 813 access_msg->pvnr_mode = ap->a_mode; 814 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 815 puffs_msg_setinfo(park_access, PUFFSOP_VN, 816 PUFFS_VN_ACCESS, VPTOPNC(vp)); 817 818 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 819 error = checkerr(pmp, error, __func__); 820 PUFFS_MSG_RELEASE(access); 821 822 return error; 823 } 824 825 int 826 puffs_vnop_getattr(void *v) 827 { 828 struct vop_getattr_args /* { 829 const struct vnodeop_desc *a_desc; 830 struct vnode *a_vp; 831 struct vattr *a_vap; 832 kauth_cred_t a_cred; 833 } */ *ap = v; 834 PUFFS_MSG_VARS(vn, getattr); 835 struct vnode *vp = ap->a_vp; 836 struct mount *mp = vp->v_mount; 837 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 838 struct vattr *vap, *rvap; 839 struct puffs_node *pn = VPTOPP(vp); 840 int error = 0; 841 842 /* 843 * A lock is required so that we do not race with 844 * setattr, write and fsync when changing vp->v_size. 845 * This is critical, since setting a stall smaler value 846 * triggers a file truncate in uvm_vnp_setsize(), which 847 * most of the time means data corruption (a chunk of 848 * data is replaced by zeroes). This can be removed if 849 * we decide one day that VOP_GETATTR must operate on 850 * a locked vnode. 851 */ 852 mutex_enter(&pn->pn_sizemtx); 853 854 REFPN(pn); 855 vap = ap->a_vap; 856 857 PUFFS_MSG_ALLOC(vn, getattr); 858 vattr_null(&getattr_msg->pvnr_va); 859 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 860 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 861 PUFFS_VN_GETATTR, VPTOPNC(vp)); 862 863 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 864 error = checkerr(pmp, error, __func__); 865 if (error) 866 goto out; 867 868 rvap = &getattr_msg->pvnr_va; 869 /* 870 * Don't listen to the file server regarding special device 871 * size info, the file server doesn't know anything about them. 872 */ 873 if (vp->v_type == VBLK || vp->v_type == VCHR) 874 rvap->va_size = vp->v_size; 875 876 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 877 if (vp->v_type == VBLK) 878 rvap->va_blocksize = BLKDEV_IOSIZE; 879 else if (vp->v_type == VCHR) 880 rvap->va_blocksize = MAXBSIZE; 881 882 (void) memcpy(vap, rvap, sizeof(struct vattr)); 883 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 884 885 if (pn->pn_stat & PNODE_METACACHE_ATIME) 886 vap->va_atime = pn->pn_mc_atime; 887 if (pn->pn_stat & PNODE_METACACHE_CTIME) 888 vap->va_ctime = pn->pn_mc_ctime; 889 if (pn->pn_stat & PNODE_METACACHE_MTIME) 890 vap->va_mtime = pn->pn_mc_mtime; 891 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 892 vap->va_size = pn->pn_mc_size; 893 } else { 894 if (rvap->va_size != VNOVAL 895 && vp->v_type != VBLK && vp->v_type != VCHR) { 896 uvm_vnp_setsize(vp, rvap->va_size); 897 pn->pn_serversize = rvap->va_size; 898 } 899 } 900 901 out: 902 puffs_releasenode(pn); 903 PUFFS_MSG_RELEASE(getattr); 904 905 mutex_exit(&pn->pn_sizemtx); 906 907 return error; 908 } 909 910 #define SETATTR_CHSIZE 0x01 911 #define SETATTR_ASYNC 0x02 912 static int 913 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 914 { 915 PUFFS_MSG_VARS(vn, setattr); 916 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 917 struct puffs_node *pn = vp->v_data; 918 int error = 0; 919 920 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 921 922 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 923 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 924 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 925 || vap->va_mode != (mode_t)VNOVAL)) 926 return EROFS; 927 928 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 929 && vp->v_type == VREG && vap->va_size != VNOVAL) 930 return EROFS; 931 932 /* 933 * Flush metacache first. If we are called with some explicit 934 * parameters, treat them as information overriding metacache 935 * information. 936 */ 937 if (pn->pn_stat & PNODE_METACACHE_MASK) { 938 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 939 && vap->va_atime.tv_sec == VNOVAL) 940 vap->va_atime = pn->pn_mc_atime; 941 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 942 && vap->va_ctime.tv_sec == VNOVAL) 943 vap->va_ctime = pn->pn_mc_ctime; 944 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 945 && vap->va_mtime.tv_sec == VNOVAL) 946 vap->va_mtime = pn->pn_mc_mtime; 947 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 948 && vap->va_size == VNOVAL) 949 vap->va_size = pn->pn_mc_size; 950 951 pn->pn_stat &= ~PNODE_METACACHE_MASK; 952 } 953 954 PUFFS_MSG_ALLOC(vn, setattr); 955 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 956 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 957 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 958 PUFFS_VN_SETATTR, VPTOPNC(vp)); 959 if (flags & SETATTR_ASYNC) 960 puffs_msg_setfaf(park_setattr); 961 962 puffs_msg_enqueue(pmp, park_setattr); 963 if ((flags & SETATTR_ASYNC) == 0) 964 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 965 PUFFS_MSG_RELEASE(setattr); 966 if ((flags & SETATTR_ASYNC) == 0) { 967 error = checkerr(pmp, error, __func__); 968 if (error) 969 return error; 970 } else { 971 error = 0; 972 } 973 974 if (vap->va_size != VNOVAL) { 975 pn->pn_serversize = vap->va_size; 976 if (flags & SETATTR_CHSIZE) 977 uvm_vnp_setsize(vp, vap->va_size); 978 } 979 980 return 0; 981 } 982 983 int 984 puffs_vnop_setattr(void *v) 985 { 986 struct vop_getattr_args /* { 987 const struct vnodeop_desc *a_desc; 988 struct vnode *a_vp; 989 struct vattr *a_vap; 990 kauth_cred_t a_cred; 991 } */ *ap = v; 992 struct puffs_node *pn = ap->a_vp->v_data; 993 int error; 994 995 mutex_enter(&pn->pn_sizemtx); 996 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 997 mutex_exit(&pn->pn_sizemtx); 998 999 return error; 1000 } 1001 1002 static __inline int 1003 doinact(struct puffs_mount *pmp, int iaflag) 1004 { 1005 1006 if (EXISTSOP(pmp, INACTIVE)) 1007 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1008 if (iaflag || ALLOPS(pmp)) 1009 return 1; 1010 else 1011 return 0; 1012 else 1013 return 1; 1014 else 1015 return 0; 1016 } 1017 1018 static void 1019 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1020 { 1021 int error; 1022 PUFFS_MSG_VARS(vn, inactive); 1023 1024 if (doinact(pmp, iaflag)) { 1025 PUFFS_MSG_ALLOC(vn, inactive); 1026 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1027 PUFFS_VN_INACTIVE, ck); 1028 1029 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1030 PUFFS_MSG_RELEASE(inactive); 1031 } 1032 } 1033 1034 /* XXX: callinactive can't setback */ 1035 int 1036 puffs_vnop_inactive(void *v) 1037 { 1038 struct vop_inactive_args /* { 1039 const struct vnodeop_desc *a_desc; 1040 struct vnode *a_vp; 1041 } */ *ap = v; 1042 PUFFS_MSG_VARS(vn, inactive); 1043 struct vnode *vp = ap->a_vp; 1044 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1045 struct puffs_node *pnode; 1046 int error; 1047 1048 pnode = vp->v_data; 1049 mutex_enter(&pnode->pn_sizemtx); 1050 1051 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1052 flushvncache(vp, 0, 0, false); 1053 PUFFS_MSG_ALLOC(vn, inactive); 1054 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1055 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1056 1057 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1058 NULL, error); 1059 PUFFS_MSG_RELEASE(inactive); 1060 } 1061 pnode->pn_stat &= ~PNODE_DOINACT; 1062 1063 /* 1064 * file server thinks it's gone? then don't be afraid care, 1065 * node's life was already all it would ever be 1066 */ 1067 if (pnode->pn_stat & PNODE_NOREFS) { 1068 pnode->pn_stat |= PNODE_DYING; 1069 *ap->a_recycle = true; 1070 } 1071 1072 mutex_exit(&pnode->pn_sizemtx); 1073 VOP_UNLOCK(vp); 1074 1075 return 0; 1076 } 1077 1078 static void 1079 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1080 { 1081 PUFFS_MSG_VARS(vn, reclaim); 1082 1083 if (!EXISTSOP(pmp, RECLAIM)) 1084 return; 1085 1086 PUFFS_MSG_ALLOC(vn, reclaim); 1087 puffs_msg_setfaf(park_reclaim); 1088 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1089 1090 puffs_msg_enqueue(pmp, park_reclaim); 1091 PUFFS_MSG_RELEASE(reclaim); 1092 } 1093 1094 /* 1095 * always FAF, we don't really care if the server wants to fail to 1096 * reclaim the node or not 1097 */ 1098 int 1099 puffs_vnop_reclaim(void *v) 1100 { 1101 struct vop_reclaim_args /* { 1102 const struct vnodeop_desc *a_desc; 1103 struct vnode *a_vp; 1104 } */ *ap = v; 1105 struct vnode *vp = ap->a_vp; 1106 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1107 struct puffs_node *pnode = vp->v_data; 1108 bool notifyserver = true; 1109 1110 /* 1111 * first things first: check if someone is trying to reclaim the 1112 * root vnode. do not allow that to travel to userspace. 1113 * Note that we don't need to take the lock similarly to 1114 * puffs_root(), since there is only one of us. 1115 */ 1116 if (vp->v_vflag & VV_ROOT) { 1117 mutex_enter(&pmp->pmp_lock); 1118 KASSERT(pmp->pmp_root != NULL); 1119 pmp->pmp_root = NULL; 1120 mutex_exit(&pmp->pmp_lock); 1121 notifyserver = false; 1122 } 1123 1124 /* 1125 * purge info from kernel before issueing FAF, since we 1126 * don't really know when we'll get around to it after 1127 * that and someone might race us into node creation 1128 */ 1129 mutex_enter(&pmp->pmp_lock); 1130 LIST_REMOVE(pnode, pn_hashent); 1131 mutex_exit(&pmp->pmp_lock); 1132 1133 if (notifyserver) 1134 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1135 1136 puffs_putvnode(vp); 1137 vp->v_data = NULL; 1138 1139 return 0; 1140 } 1141 1142 #define CSIZE sizeof(**ap->a_cookies) 1143 int 1144 puffs_vnop_readdir(void *v) 1145 { 1146 struct vop_readdir_args /* { 1147 const struct vnodeop_desc *a_desc; 1148 struct vnode *a_vp; 1149 struct uio *a_uio; 1150 kauth_cred_t a_cred; 1151 int *a_eofflag; 1152 off_t **a_cookies; 1153 int *a_ncookies; 1154 } */ *ap = v; 1155 PUFFS_MSG_VARS(vn, readdir); 1156 struct vnode *vp = ap->a_vp; 1157 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1158 size_t argsize, tomove, cookiemem, cookiesmax; 1159 struct uio *uio = ap->a_uio; 1160 size_t howmuch, resid; 1161 int error; 1162 1163 /* 1164 * ok, so we need: resid + cookiemem = maxreq 1165 * => resid + cookiesize * (resid/minsize) = maxreq 1166 * => resid + cookiesize/minsize * resid = maxreq 1167 * => (cookiesize/minsize + 1) * resid = maxreq 1168 * => resid = maxreq / (cookiesize/minsize + 1) 1169 * 1170 * Since cookiesize <= minsize and we're not very big on floats, 1171 * we approximate that to be 1. Therefore: 1172 * 1173 * resid = maxreq / 2; 1174 * 1175 * Well, at least we didn't have to use differential equations 1176 * or the Gram-Schmidt process. 1177 * 1178 * (yes, I'm very afraid of this) 1179 */ 1180 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1181 1182 if (ap->a_cookies) { 1183 KASSERT(ap->a_ncookies != NULL); 1184 if (pmp->pmp_args.pa_fhsize == 0) 1185 return EOPNOTSUPP; 1186 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1187 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1188 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1189 } else { 1190 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1191 cookiesmax = 0; 1192 cookiemem = 0; 1193 } 1194 1195 argsize = sizeof(struct puffs_vnmsg_readdir); 1196 tomove = resid + cookiemem; 1197 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1198 (void *)&readdir_msg, 1); 1199 1200 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1201 readdir_msg->pvnr_offset = uio->uio_offset; 1202 readdir_msg->pvnr_resid = resid; 1203 readdir_msg->pvnr_ncookies = cookiesmax; 1204 readdir_msg->pvnr_eofflag = 0; 1205 readdir_msg->pvnr_dentoff = cookiemem; 1206 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1207 PUFFS_VN_READDIR, VPTOPNC(vp)); 1208 puffs_msg_setdelta(park_readdir, tomove); 1209 1210 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1211 error = checkerr(pmp, error, __func__); 1212 if (error) 1213 goto out; 1214 1215 /* userspace is cheating? */ 1216 if (readdir_msg->pvnr_resid > resid) { 1217 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1218 "resid grew", VPTOPNC(vp)); 1219 ERROUT(EPROTO); 1220 } 1221 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1222 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1223 "too many cookies", VPTOPNC(vp)); 1224 ERROUT(EPROTO); 1225 } 1226 1227 /* check eof */ 1228 if (readdir_msg->pvnr_eofflag) 1229 *ap->a_eofflag = 1; 1230 1231 /* bouncy-wouncy with the directory data */ 1232 howmuch = resid - readdir_msg->pvnr_resid; 1233 1234 /* force eof if no data was returned (getcwd() needs this) */ 1235 if (howmuch == 0) { 1236 *ap->a_eofflag = 1; 1237 goto out; 1238 } 1239 1240 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1241 if (error) 1242 goto out; 1243 1244 /* provide cookies to caller if so desired */ 1245 if (ap->a_cookies) { 1246 #ifdef DIAGNOSTIC 1247 KASSERT(curlwp != uvm.pagedaemon_lwp); 1248 #endif 1249 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1250 M_TEMP, M_WAITOK); 1251 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1252 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1253 *ap->a_ncookies*CSIZE); 1254 } 1255 1256 /* next readdir starts here */ 1257 uio->uio_offset = readdir_msg->pvnr_offset; 1258 1259 out: 1260 puffs_msgmem_release(park_readdir); 1261 return error; 1262 } 1263 #undef CSIZE 1264 1265 /* 1266 * poll works by consuming the bitmask in pn_revents. If there are 1267 * events available, poll returns immediately. If not, it issues a 1268 * poll to userspace, selrecords itself and returns with no available 1269 * events. When the file server returns, it executes puffs_parkdone_poll(), 1270 * where available events are added to the bitmask. selnotify() is 1271 * then also executed by that function causing us to enter here again 1272 * and hopefully find the missing bits (unless someone got them first, 1273 * in which case it starts all over again). 1274 */ 1275 int 1276 puffs_vnop_poll(void *v) 1277 { 1278 struct vop_poll_args /* { 1279 const struct vnodeop_desc *a_desc; 1280 struct vnode *a_vp; 1281 int a_events; 1282 } */ *ap = v; 1283 PUFFS_MSG_VARS(vn, poll); 1284 struct vnode *vp = ap->a_vp; 1285 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1286 struct puffs_node *pn = vp->v_data; 1287 int events, error; 1288 1289 if (EXISTSOP(pmp, POLL)) { 1290 mutex_enter(&pn->pn_mtx); 1291 events = pn->pn_revents & ap->a_events; 1292 if (events & ap->a_events) { 1293 pn->pn_revents &= ~ap->a_events; 1294 mutex_exit(&pn->pn_mtx); 1295 1296 return events; 1297 } else { 1298 puffs_referencenode(pn); 1299 mutex_exit(&pn->pn_mtx); 1300 1301 PUFFS_MSG_ALLOC(vn, poll); 1302 poll_msg->pvnr_events = ap->a_events; 1303 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1304 PUFFS_VN_POLL, VPTOPNC(vp)); 1305 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1306 selrecord(curlwp, &pn->pn_sel); 1307 1308 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1309 NULL, error); 1310 PUFFS_MSG_RELEASE(poll); 1311 1312 return 0; 1313 } 1314 } else { 1315 return genfs_poll(v); 1316 } 1317 } 1318 1319 static int 1320 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1321 { 1322 struct puffs_node *pn = VPTOPP(vp); 1323 struct vattr va; 1324 int pflags, error; 1325 1326 /* flush out information from our metacache, see vop_setattr */ 1327 if (pn->pn_stat & PNODE_METACACHE_MASK 1328 && (pn->pn_stat & PNODE_DYING) == 0) { 1329 vattr_null(&va); 1330 error = dosetattr(vp, &va, FSCRED, 1331 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1332 if (error) 1333 return error; 1334 } 1335 1336 /* 1337 * flush pages to avoid being overly dirty 1338 */ 1339 pflags = PGO_CLEANIT; 1340 if (wait) 1341 pflags |= PGO_SYNCIO; 1342 mutex_enter(vp->v_interlock); 1343 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1344 } 1345 1346 int 1347 puffs_vnop_fsync(void *v) 1348 { 1349 struct vop_fsync_args /* { 1350 const struct vnodeop_desc *a_desc; 1351 struct vnode *a_vp; 1352 kauth_cred_t a_cred; 1353 int a_flags; 1354 off_t a_offlo; 1355 off_t a_offhi; 1356 } */ *ap = v; 1357 PUFFS_MSG_VARS(vn, fsync); 1358 struct vnode *vp = ap->a_vp; 1359 struct puffs_node *pn = VPTOPP(vp); 1360 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1361 int error, dofaf; 1362 1363 if (ap->a_flags & FSYNC_WAIT) { 1364 mutex_enter(&pn->pn_sizemtx); 1365 } else { 1366 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1367 return EDEADLK; 1368 } 1369 1370 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1371 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1372 if (error) 1373 goto out; 1374 1375 /* 1376 * HELLO! We exit already here if the user server does not 1377 * support fsync OR if we should call fsync for a node which 1378 * has references neither in the kernel or the fs server. 1379 * Otherwise we continue to issue fsync() forward. 1380 */ 1381 error = 0; 1382 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1383 goto out; 1384 1385 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1386 /* 1387 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1388 * only FAFs for those. Otherwise there's a danger of deadlock, 1389 * since the execution context here might be the user server 1390 * doing some operation on another fs, which in turn caused a 1391 * vnode to be reclaimed from the freelist for this fs. 1392 */ 1393 if (dofaf == 0) { 1394 mutex_enter(vp->v_interlock); 1395 if (vp->v_iflag & VI_XLOCK) 1396 dofaf = 1; 1397 mutex_exit(vp->v_interlock); 1398 } 1399 1400 PUFFS_MSG_ALLOC(vn, fsync); 1401 if (dofaf) 1402 puffs_msg_setfaf(park_fsync); 1403 1404 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1405 fsync_msg->pvnr_flags = ap->a_flags; 1406 fsync_msg->pvnr_offlo = ap->a_offlo; 1407 fsync_msg->pvnr_offhi = ap->a_offhi; 1408 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1409 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1410 1411 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1412 PUFFS_MSG_RELEASE(fsync); 1413 1414 error = checkerr(pmp, error, __func__); 1415 1416 out: 1417 mutex_exit(&pn->pn_sizemtx); 1418 return error; 1419 } 1420 1421 int 1422 puffs_vnop_seek(void *v) 1423 { 1424 struct vop_seek_args /* { 1425 const struct vnodeop_desc *a_desc; 1426 struct vnode *a_vp; 1427 off_t a_oldoff; 1428 off_t a_newoff; 1429 kauth_cred_t a_cred; 1430 } */ *ap = v; 1431 PUFFS_MSG_VARS(vn, seek); 1432 struct vnode *vp = ap->a_vp; 1433 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1434 int error; 1435 1436 PUFFS_MSG_ALLOC(vn, seek); 1437 seek_msg->pvnr_oldoff = ap->a_oldoff; 1438 seek_msg->pvnr_newoff = ap->a_newoff; 1439 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1440 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1441 PUFFS_VN_SEEK, VPTOPNC(vp)); 1442 1443 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1444 PUFFS_MSG_RELEASE(seek); 1445 return checkerr(pmp, error, __func__); 1446 } 1447 1448 static int 1449 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1450 struct componentname *cnp) 1451 { 1452 PUFFS_MSG_VARS(vn, remove); 1453 int error; 1454 1455 PUFFS_MSG_ALLOC(vn, remove); 1456 remove_msg->pvnr_cookie_targ = ck; 1457 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1458 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1459 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1460 1461 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1462 PUFFS_MSG_RELEASE(remove); 1463 1464 return checkerr(pmp, error, __func__); 1465 } 1466 1467 /* 1468 * XXX: can't use callremove now because can't catch setbacks with 1469 * it due to lack of a pnode argument. 1470 */ 1471 int 1472 puffs_vnop_remove(void *v) 1473 { 1474 struct vop_remove_args /* { 1475 const struct vnodeop_desc *a_desc; 1476 struct vnode *a_dvp; 1477 struct vnode *a_vp; 1478 struct componentname *a_cnp; 1479 } */ *ap = v; 1480 PUFFS_MSG_VARS(vn, remove); 1481 struct vnode *dvp = ap->a_dvp; 1482 struct vnode *vp = ap->a_vp; 1483 struct puffs_node *dpn = VPTOPP(dvp); 1484 struct puffs_node *pn = VPTOPP(vp); 1485 struct componentname *cnp = ap->a_cnp; 1486 struct mount *mp = dvp->v_mount; 1487 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1488 int error; 1489 1490 PUFFS_MSG_ALLOC(vn, remove); 1491 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1492 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1493 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1494 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1495 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1496 1497 puffs_msg_enqueue(pmp, park_remove); 1498 REFPN_AND_UNLOCKVP(dvp, dpn); 1499 if (dvp == vp) 1500 REFPN(pn); 1501 else 1502 REFPN_AND_UNLOCKVP(vp, pn); 1503 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1504 1505 PUFFS_MSG_RELEASE(remove); 1506 1507 RELEPN_AND_VP(dvp, dpn); 1508 RELEPN_AND_VP(vp, pn); 1509 1510 error = checkerr(pmp, error, __func__); 1511 return error; 1512 } 1513 1514 int 1515 puffs_vnop_mkdir(void *v) 1516 { 1517 struct vop_mkdir_args /* { 1518 const struct vnodeop_desc *a_desc; 1519 struct vnode *a_dvp; 1520 struct vnode **a_vpp; 1521 struct componentname *a_cnp; 1522 struct vattr *a_vap; 1523 } */ *ap = v; 1524 PUFFS_MSG_VARS(vn, mkdir); 1525 struct vnode *dvp = ap->a_dvp; 1526 struct puffs_node *dpn = VPTOPP(dvp); 1527 struct componentname *cnp = ap->a_cnp; 1528 struct mount *mp = dvp->v_mount; 1529 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1530 int error; 1531 1532 PUFFS_MSG_ALLOC(vn, mkdir); 1533 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1534 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1535 mkdir_msg->pvnr_va = *ap->a_vap; 1536 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1537 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1538 1539 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1540 1541 error = checkerr(pmp, error, __func__); 1542 if (error) 1543 goto out; 1544 1545 error = puffs_newnode(mp, dvp, ap->a_vpp, 1546 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1547 if (error) 1548 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1549 mkdir_msg->pvnr_newnode, cnp); 1550 1551 out: 1552 vput(dvp); 1553 PUFFS_MSG_RELEASE(mkdir); 1554 return error; 1555 } 1556 1557 static int 1558 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1559 struct componentname *cnp) 1560 { 1561 PUFFS_MSG_VARS(vn, rmdir); 1562 int error; 1563 1564 PUFFS_MSG_ALLOC(vn, rmdir); 1565 rmdir_msg->pvnr_cookie_targ = ck; 1566 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1567 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1568 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1569 1570 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1571 PUFFS_MSG_RELEASE(rmdir); 1572 1573 return checkerr(pmp, error, __func__); 1574 } 1575 1576 int 1577 puffs_vnop_rmdir(void *v) 1578 { 1579 struct vop_rmdir_args /* { 1580 const struct vnodeop_desc *a_desc; 1581 struct vnode *a_dvp; 1582 struct vnode *a_vp; 1583 struct componentname *a_cnp; 1584 } */ *ap = v; 1585 PUFFS_MSG_VARS(vn, rmdir); 1586 struct vnode *dvp = ap->a_dvp; 1587 struct vnode *vp = ap->a_vp; 1588 struct puffs_node *dpn = VPTOPP(dvp); 1589 struct puffs_node *pn = VPTOPP(vp); 1590 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1591 struct componentname *cnp = ap->a_cnp; 1592 int error; 1593 1594 PUFFS_MSG_ALLOC(vn, rmdir); 1595 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1596 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1597 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1598 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1599 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1600 1601 puffs_msg_enqueue(pmp, park_rmdir); 1602 REFPN_AND_UNLOCKVP(dvp, dpn); 1603 REFPN_AND_UNLOCKVP(vp, pn); 1604 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1605 1606 PUFFS_MSG_RELEASE(rmdir); 1607 1608 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1609 RELEPN_AND_VP(dvp, dpn); 1610 RELEPN_AND_VP(vp, pn); 1611 1612 return error; 1613 } 1614 1615 int 1616 puffs_vnop_link(void *v) 1617 { 1618 struct vop_link_args /* { 1619 const struct vnodeop_desc *a_desc; 1620 struct vnode *a_dvp; 1621 struct vnode *a_vp; 1622 struct componentname *a_cnp; 1623 } */ *ap = v; 1624 PUFFS_MSG_VARS(vn, link); 1625 struct vnode *dvp = ap->a_dvp; 1626 struct vnode *vp = ap->a_vp; 1627 struct puffs_node *dpn = VPTOPP(dvp); 1628 struct puffs_node *pn = VPTOPP(vp); 1629 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1630 struct componentname *cnp = ap->a_cnp; 1631 int error; 1632 1633 PUFFS_MSG_ALLOC(vn, link); 1634 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1635 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1636 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1637 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1638 PUFFS_VN_LINK, VPTOPNC(dvp)); 1639 1640 puffs_msg_enqueue(pmp, park_link); 1641 REFPN_AND_UNLOCKVP(dvp, dpn); 1642 REFPN(pn); 1643 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1644 1645 PUFFS_MSG_RELEASE(link); 1646 1647 error = checkerr(pmp, error, __func__); 1648 1649 /* 1650 * XXX: stay in touch with the cache. I don't like this, but 1651 * don't have a better solution either. See also puffs_rename(). 1652 */ 1653 if (error == 0) 1654 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1655 1656 RELEPN_AND_VP(dvp, dpn); 1657 puffs_releasenode(pn); 1658 1659 return error; 1660 } 1661 1662 int 1663 puffs_vnop_symlink(void *v) 1664 { 1665 struct vop_symlink_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 char *a_target; 1672 } */ *ap = v; 1673 PUFFS_MSG_VARS(vn, symlink); 1674 struct vnode *dvp = ap->a_dvp; 1675 struct puffs_node *dpn = VPTOPP(dvp); 1676 struct mount *mp = dvp->v_mount; 1677 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1678 struct componentname *cnp = ap->a_cnp; 1679 int error; 1680 1681 *ap->a_vpp = NULL; 1682 1683 PUFFS_MSG_ALLOC(vn, symlink); 1684 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1685 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1686 symlink_msg->pvnr_va = *ap->a_vap; 1687 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1688 sizeof(symlink_msg->pvnr_link)); 1689 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1690 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1691 1692 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1693 1694 error = checkerr(pmp, error, __func__); 1695 if (error) 1696 goto out; 1697 1698 error = puffs_newnode(mp, dvp, ap->a_vpp, 1699 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1700 if (error) 1701 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1702 symlink_msg->pvnr_newnode, cnp); 1703 1704 out: 1705 vput(dvp); 1706 PUFFS_MSG_RELEASE(symlink); 1707 1708 return error; 1709 } 1710 1711 int 1712 puffs_vnop_readlink(void *v) 1713 { 1714 struct vop_readlink_args /* { 1715 const struct vnodeop_desc *a_desc; 1716 struct vnode *a_vp; 1717 struct uio *a_uio; 1718 kauth_cred_t a_cred; 1719 } */ *ap = v; 1720 PUFFS_MSG_VARS(vn, readlink); 1721 struct vnode *vp = ap->a_vp; 1722 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1723 size_t linklen; 1724 int error; 1725 1726 PUFFS_MSG_ALLOC(vn, readlink); 1727 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1728 linklen = sizeof(readlink_msg->pvnr_link); 1729 readlink_msg->pvnr_linklen = linklen; 1730 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1731 PUFFS_VN_READLINK, VPTOPNC(vp)); 1732 1733 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1734 error = checkerr(pmp, error, __func__); 1735 if (error) 1736 goto out; 1737 1738 /* bad bad user file server */ 1739 if (readlink_msg->pvnr_linklen > linklen) { 1740 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1741 "linklen too big", VPTOPNC(ap->a_vp)); 1742 error = EPROTO; 1743 goto out; 1744 } 1745 1746 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1747 ap->a_uio); 1748 out: 1749 PUFFS_MSG_RELEASE(readlink); 1750 return error; 1751 } 1752 1753 int 1754 puffs_vnop_rename(void *v) 1755 { 1756 struct vop_rename_args /* { 1757 const struct vnodeop_desc *a_desc; 1758 struct vnode *a_fdvp; 1759 struct vnode *a_fvp; 1760 struct componentname *a_fcnp; 1761 struct vnode *a_tdvp; 1762 struct vnode *a_tvp; 1763 struct componentname *a_tcnp; 1764 } */ *ap = v; 1765 PUFFS_MSG_VARS(vn, rename); 1766 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 1767 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 1768 struct puffs_node *fpn = ap->a_fvp->v_data; 1769 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1770 int error; 1771 bool doabort = true; 1772 1773 if ((fvp->v_mount != tdvp->v_mount) || 1774 (tvp && (fvp->v_mount != tvp->v_mount))) { 1775 ERROUT(EXDEV); 1776 } 1777 1778 PUFFS_MSG_ALLOC(vn, rename); 1779 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 1780 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 1781 if (tvp) 1782 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 1783 else 1784 rename_msg->pvnr_cookie_targ = NULL; 1785 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1786 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1787 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1788 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1789 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1790 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1791 1792 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1793 doabort = false; 1794 PUFFS_MSG_RELEASE(rename); 1795 error = checkerr(pmp, error, __func__); 1796 1797 /* 1798 * XXX: stay in touch with the cache. I don't like this, but 1799 * don't have a better solution either. See also puffs_link(). 1800 */ 1801 if (error == 0) 1802 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1803 1804 out: 1805 if (doabort) 1806 VOP_ABORTOP(tdvp, ap->a_tcnp); 1807 if (tvp != NULL) 1808 vput(tvp); 1809 if (tdvp == tvp) 1810 vrele(tdvp); 1811 else 1812 vput(tdvp); 1813 1814 if (doabort) 1815 VOP_ABORTOP(fdvp, ap->a_fcnp); 1816 vrele(fdvp); 1817 vrele(fvp); 1818 1819 return error; 1820 } 1821 1822 #define RWARGS(cont, iofl, move, offset, creds) \ 1823 (cont)->pvnr_ioflag = (iofl); \ 1824 (cont)->pvnr_resid = (move); \ 1825 (cont)->pvnr_offset = (offset); \ 1826 puffs_credcvt(&(cont)->pvnr_cred, creds) 1827 1828 int 1829 puffs_vnop_read(void *v) 1830 { 1831 struct vop_read_args /* { 1832 const struct vnodeop_desc *a_desc; 1833 struct vnode *a_vp; 1834 struct uio *a_uio; 1835 int a_ioflag; 1836 kauth_cred_t a_cred; 1837 } */ *ap = v; 1838 PUFFS_MSG_VARS(vn, read); 1839 struct vnode *vp = ap->a_vp; 1840 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1841 struct uio *uio = ap->a_uio; 1842 size_t tomove, argsize; 1843 vsize_t bytelen; 1844 int error; 1845 1846 read_msg = NULL; 1847 error = 0; 1848 1849 /* std sanity */ 1850 if (uio->uio_resid == 0) 1851 return 0; 1852 if (uio->uio_offset < 0) 1853 return EINVAL; 1854 1855 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1856 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1857 1858 while (uio->uio_resid > 0) { 1859 bytelen = MIN(uio->uio_resid, 1860 vp->v_size - uio->uio_offset); 1861 if (bytelen == 0) 1862 break; 1863 1864 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1865 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1866 if (error) 1867 break; 1868 } 1869 1870 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1871 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1872 } else { 1873 /* 1874 * in case it's not a regular file or we're operating 1875 * uncached, do read in the old-fashioned style, 1876 * i.e. explicit read operations 1877 */ 1878 1879 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1880 argsize = sizeof(struct puffs_vnmsg_read); 1881 puffs_msgmem_alloc(argsize + tomove, &park_read, 1882 (void *)&read_msg, 1); 1883 1884 error = 0; 1885 while (uio->uio_resid > 0) { 1886 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1887 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1888 RWARGS(read_msg, ap->a_ioflag, tomove, 1889 uio->uio_offset, ap->a_cred); 1890 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1891 PUFFS_VN_READ, VPTOPNC(vp)); 1892 puffs_msg_setdelta(park_read, tomove); 1893 1894 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1895 NULL, error); 1896 error = checkerr(pmp, error, __func__); 1897 if (error) 1898 break; 1899 1900 if (read_msg->pvnr_resid > tomove) { 1901 puffs_senderr(pmp, PUFFS_ERR_READ, 1902 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1903 error = EPROTO; 1904 break; 1905 } 1906 1907 error = uiomove(read_msg->pvnr_data, 1908 tomove - read_msg->pvnr_resid, uio); 1909 1910 /* 1911 * in case the file is out of juice, resid from 1912 * userspace is != 0. and the error-case is 1913 * quite obvious 1914 */ 1915 if (error || read_msg->pvnr_resid) 1916 break; 1917 } 1918 1919 puffs_msgmem_release(park_read); 1920 } 1921 1922 return error; 1923 } 1924 1925 /* 1926 * XXX: in case of a failure, this leaves uio in a bad state. 1927 * We could theoretically copy the uio and iovecs and "replay" 1928 * them the right amount after the userspace trip, but don't 1929 * bother for now. 1930 */ 1931 int 1932 puffs_vnop_write(void *v) 1933 { 1934 struct vop_write_args /* { 1935 const struct vnodeop_desc *a_desc; 1936 struct vnode *a_vp; 1937 struct uio *a_uio; 1938 int a_ioflag; 1939 kauth_cred_t a_cred; 1940 } */ *ap = v; 1941 PUFFS_MSG_VARS(vn, write); 1942 struct vnode *vp = ap->a_vp; 1943 struct puffs_node *pn = VPTOPP(vp); 1944 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1945 struct uio *uio = ap->a_uio; 1946 size_t tomove, argsize; 1947 off_t oldoff, newoff, origoff; 1948 vsize_t bytelen; 1949 int error, uflags; 1950 int ubcflags; 1951 1952 error = uflags = 0; 1953 write_msg = NULL; 1954 1955 mutex_enter(&pn->pn_sizemtx); 1956 1957 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1958 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1959 1960 /* 1961 * userspace *should* be allowed to control this, 1962 * but with UBC it's a bit unclear how to handle it 1963 */ 1964 if (ap->a_ioflag & IO_APPEND) 1965 uio->uio_offset = vp->v_size; 1966 1967 origoff = uio->uio_offset; 1968 while (uio->uio_resid > 0) { 1969 uflags |= PUFFS_UPDATECTIME; 1970 uflags |= PUFFS_UPDATEMTIME; 1971 oldoff = uio->uio_offset; 1972 bytelen = uio->uio_resid; 1973 1974 newoff = oldoff + bytelen; 1975 if (vp->v_size < newoff) { 1976 uvm_vnp_setwritesize(vp, newoff); 1977 } 1978 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1979 UVM_ADV_RANDOM, ubcflags); 1980 1981 /* 1982 * In case of a ubc_uiomove() error, 1983 * opt to not extend the file at all and 1984 * return an error. Otherwise, if we attempt 1985 * to clear the memory we couldn't fault to, 1986 * we might generate a kernel page fault. 1987 */ 1988 if (vp->v_size < newoff) { 1989 if (error == 0) { 1990 uflags |= PUFFS_UPDATESIZE; 1991 uvm_vnp_setsize(vp, newoff); 1992 } else { 1993 uvm_vnp_setwritesize(vp, vp->v_size); 1994 } 1995 } 1996 if (error) 1997 break; 1998 1999 /* 2000 * If we're writing large files, flush to file server 2001 * every 64k. Otherwise we can very easily exhaust 2002 * kernel and user memory, as the file server cannot 2003 * really keep up with our writing speed. 2004 * 2005 * Note: this does *NOT* honor MNT_ASYNC, because 2006 * that gives userland too much say in the kernel. 2007 */ 2008 if (oldoff >> 16 != uio->uio_offset >> 16) { 2009 mutex_enter(vp->v_interlock); 2010 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2011 uio->uio_offset & ~0xffff, 2012 PGO_CLEANIT | PGO_SYNCIO); 2013 if (error) 2014 break; 2015 } 2016 } 2017 2018 /* synchronous I/O? */ 2019 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2020 mutex_enter(vp->v_interlock); 2021 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2022 round_page(uio->uio_offset), 2023 PGO_CLEANIT | PGO_SYNCIO); 2024 2025 /* write through page cache? */ 2026 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2027 mutex_enter(vp->v_interlock); 2028 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2029 round_page(uio->uio_offset), PGO_CLEANIT); 2030 } 2031 2032 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2033 } else { 2034 /* tomove is non-increasing */ 2035 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2036 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2037 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2038 2039 while (uio->uio_resid > 0) { 2040 /* move data to buffer */ 2041 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2042 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2043 RWARGS(write_msg, ap->a_ioflag, tomove, 2044 uio->uio_offset, ap->a_cred); 2045 error = uiomove(write_msg->pvnr_data, tomove, uio); 2046 if (error) 2047 break; 2048 2049 /* move buffer to userspace */ 2050 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2051 PUFFS_VN_WRITE, VPTOPNC(vp)); 2052 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2053 NULL, error); 2054 error = checkerr(pmp, error, __func__); 2055 if (error) 2056 break; 2057 2058 if (write_msg->pvnr_resid > tomove) { 2059 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2060 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2061 error = EPROTO; 2062 break; 2063 } 2064 2065 /* adjust file size */ 2066 if (vp->v_size < uio->uio_offset) 2067 uvm_vnp_setsize(vp, uio->uio_offset); 2068 2069 /* didn't move everything? bad userspace. bail */ 2070 if (write_msg->pvnr_resid != 0) { 2071 error = EIO; 2072 break; 2073 } 2074 } 2075 puffs_msgmem_release(park_write); 2076 } 2077 2078 mutex_exit(&pn->pn_sizemtx); 2079 return error; 2080 } 2081 2082 int 2083 puffs_vnop_print(void *v) 2084 { 2085 struct vop_print_args /* { 2086 struct vnode *a_vp; 2087 } */ *ap = v; 2088 PUFFS_MSG_VARS(vn, print); 2089 struct vnode *vp = ap->a_vp; 2090 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2091 struct puffs_node *pn = vp->v_data; 2092 int error; 2093 2094 /* kernel portion */ 2095 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2096 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2097 if (vp->v_type == VFIFO) 2098 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2099 printf("\n"); 2100 2101 /* userspace portion */ 2102 if (EXISTSOP(pmp, PRINT)) { 2103 PUFFS_MSG_ALLOC(vn, print); 2104 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2105 PUFFS_VN_PRINT, VPTOPNC(vp)); 2106 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2107 NULL, error); 2108 PUFFS_MSG_RELEASE(print); 2109 } 2110 2111 return 0; 2112 } 2113 2114 int 2115 puffs_vnop_pathconf(void *v) 2116 { 2117 struct vop_pathconf_args /* { 2118 const struct vnodeop_desc *a_desc; 2119 struct vnode *a_vp; 2120 int a_name; 2121 register_t *a_retval; 2122 } */ *ap = v; 2123 PUFFS_MSG_VARS(vn, pathconf); 2124 struct vnode *vp = ap->a_vp; 2125 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2126 int error; 2127 2128 PUFFS_MSG_ALLOC(vn, pathconf); 2129 pathconf_msg->pvnr_name = ap->a_name; 2130 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2131 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2132 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2133 error = checkerr(pmp, error, __func__); 2134 if (!error) 2135 *ap->a_retval = pathconf_msg->pvnr_retval; 2136 PUFFS_MSG_RELEASE(pathconf); 2137 2138 return error; 2139 } 2140 2141 int 2142 puffs_vnop_advlock(void *v) 2143 { 2144 struct vop_advlock_args /* { 2145 const struct vnodeop_desc *a_desc; 2146 struct vnode *a_vp; 2147 void *a_id; 2148 int a_op; 2149 struct flock *a_fl; 2150 int a_flags; 2151 } */ *ap = v; 2152 PUFFS_MSG_VARS(vn, advlock); 2153 struct vnode *vp = ap->a_vp; 2154 struct puffs_node *pn = VPTOPP(vp); 2155 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2156 int error; 2157 2158 if (!EXISTSOP(pmp, ADVLOCK)) 2159 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2160 2161 PUFFS_MSG_ALLOC(vn, advlock); 2162 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2163 sizeof(advlock_msg->pvnr_fl)); 2164 advlock_msg->pvnr_id = ap->a_id; 2165 advlock_msg->pvnr_op = ap->a_op; 2166 advlock_msg->pvnr_flags = ap->a_flags; 2167 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2168 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2169 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2170 error = checkerr(pmp, error, __func__); 2171 PUFFS_MSG_RELEASE(advlock); 2172 2173 return error; 2174 } 2175 2176 int 2177 puffs_vnop_abortop(void *v) 2178 { 2179 struct vop_abortop_args /* { 2180 struct vnode *a_dvp; 2181 struct componentname *a_cnp; 2182 }; */ *ap = v; 2183 PUFFS_MSG_VARS(vn, abortop); 2184 struct vnode *dvp = ap->a_dvp; 2185 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2186 struct componentname *cnp = ap->a_cnp; 2187 2188 if (EXISTSOP(pmp, ABORTOP)) { 2189 PUFFS_MSG_ALLOC(vn, abortop); 2190 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2191 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2192 puffs_msg_setfaf(park_abortop); 2193 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2194 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2195 2196 puffs_msg_enqueue(pmp, park_abortop); 2197 PUFFS_MSG_RELEASE(abortop); 2198 } 2199 2200 return genfs_abortop(v); 2201 } 2202 2203 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2204 2205 /* 2206 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2207 */ 2208 int 2209 puffs_vnop_strategy(void *v) 2210 { 2211 struct vop_strategy_args /* { 2212 const struct vnodeop_desc *a_desc; 2213 struct vnode *a_vp; 2214 struct buf *a_bp; 2215 } */ *ap = v; 2216 PUFFS_MSG_VARS(vn, rw); 2217 struct vnode *vp = ap->a_vp; 2218 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2219 struct puffs_node *pn; 2220 struct buf *bp; 2221 size_t argsize; 2222 size_t tomove, moved; 2223 int error, dofaf, cansleep, dobiodone; 2224 2225 pmp = MPTOPUFFSMP(vp->v_mount); 2226 bp = ap->a_bp; 2227 error = 0; 2228 dofaf = 0; 2229 cansleep = 0; 2230 pn = VPTOPP(vp); 2231 park_rw = NULL; /* explicit */ 2232 dobiodone = 1; 2233 2234 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2235 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2236 ERROUT(EOPNOTSUPP); 2237 2238 /* 2239 * Short-circuit optimization: don't flush buffer in between 2240 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2241 */ 2242 if (pn->pn_stat & PNODE_DYING) { 2243 KASSERT(BUF_ISWRITE(bp)); 2244 bp->b_resid = 0; 2245 goto out; 2246 } 2247 2248 #ifdef DIAGNOSTIC 2249 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2250 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2251 bp->b_bcount); 2252 #endif 2253 2254 /* 2255 * See explanation for the necessity of a FAF in puffs_fsync. 2256 * 2257 * Also, do FAF in case we're suspending. 2258 * See puffs_vfsops.c:pageflush() 2259 */ 2260 if (BUF_ISWRITE(bp)) { 2261 mutex_enter(vp->v_interlock); 2262 if (vp->v_iflag & VI_XLOCK) 2263 dofaf = 1; 2264 if (pn->pn_stat & PNODE_FAF) 2265 dofaf = 1; 2266 mutex_exit(vp->v_interlock); 2267 } 2268 2269 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2270 2271 #ifdef DIAGNOSTIC 2272 if (curlwp == uvm.pagedaemon_lwp) 2273 KASSERT(dofaf || BIOASYNC(bp)); 2274 #endif 2275 2276 /* allocate transport structure */ 2277 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2278 argsize = sizeof(struct puffs_vnmsg_rw); 2279 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2280 (void *)&rw_msg, cansleep); 2281 if (error) 2282 goto out; 2283 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2284 2285 /* 2x2 cases: read/write, faf/nofaf */ 2286 if (BUF_ISREAD(bp)) { 2287 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2288 PUFFS_VN_READ, VPTOPNC(vp)); 2289 puffs_msg_setdelta(park_rw, tomove); 2290 if (BIOASYNC(bp)) { 2291 puffs_msg_setcall(park_rw, 2292 puffs_parkdone_asyncbioread, bp); 2293 puffs_msg_enqueue(pmp, park_rw); 2294 dobiodone = 0; 2295 } else { 2296 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2297 NULL, error); 2298 error = checkerr(pmp, error, __func__); 2299 if (error) 2300 goto out; 2301 2302 if (rw_msg->pvnr_resid > tomove) { 2303 puffs_senderr(pmp, PUFFS_ERR_READ, 2304 E2BIG, "resid grew", VPTOPNC(vp)); 2305 ERROUT(EPROTO); 2306 } 2307 2308 moved = tomove - rw_msg->pvnr_resid; 2309 2310 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2311 bp->b_resid = bp->b_bcount - moved; 2312 } 2313 } else { 2314 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2315 PUFFS_VN_WRITE, VPTOPNC(vp)); 2316 /* 2317 * make pages read-only before we write them if we want 2318 * write caching info 2319 */ 2320 if (PUFFS_WCACHEINFO(pmp)) { 2321 struct uvm_object *uobj = &vp->v_uobj; 2322 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2323 struct vm_page *vmp; 2324 int i; 2325 2326 for (i = 0; i < npages; i++) { 2327 vmp= uvm_pageratop((vaddr_t)bp->b_data 2328 + (i << PAGE_SHIFT)); 2329 DPRINTF(("puffs_strategy: write-protecting " 2330 "vp %p page %p, offset %" PRId64"\n", 2331 vp, vmp, vmp->offset)); 2332 mutex_enter(uobj->vmobjlock); 2333 vmp->flags |= PG_RDONLY; 2334 pmap_page_protect(vmp, VM_PROT_READ); 2335 mutex_exit(uobj->vmobjlock); 2336 } 2337 } 2338 2339 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2340 if (dofaf) { 2341 puffs_msg_setfaf(park_rw); 2342 } else if (BIOASYNC(bp)) { 2343 puffs_msg_setcall(park_rw, 2344 puffs_parkdone_asyncbiowrite, bp); 2345 dobiodone = 0; 2346 } 2347 2348 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2349 2350 if (dobiodone == 0) 2351 goto out; 2352 2353 /* 2354 * XXXXXXXX: wrong, but kernel can't survive strategy 2355 * failure currently. Here, have one more X: X. 2356 */ 2357 if (error != ENOMEM) 2358 error = 0; 2359 2360 error = checkerr(pmp, error, __func__); 2361 if (error) 2362 goto out; 2363 2364 if (rw_msg->pvnr_resid > tomove) { 2365 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2366 E2BIG, "resid grew", VPTOPNC(vp)); 2367 ERROUT(EPROTO); 2368 } 2369 2370 /* 2371 * FAF moved everything. Frankly, we don't 2372 * really have a choice. 2373 */ 2374 if (dofaf && error == 0) 2375 moved = tomove; 2376 else 2377 moved = tomove - rw_msg->pvnr_resid; 2378 2379 bp->b_resid = bp->b_bcount - moved; 2380 if (bp->b_resid != 0) { 2381 ERROUT(EIO); 2382 } 2383 } 2384 2385 out: 2386 if (park_rw) 2387 puffs_msgmem_release(park_rw); 2388 2389 if (error) 2390 bp->b_error = error; 2391 2392 if (error || dobiodone) 2393 biodone(bp); 2394 2395 return error; 2396 } 2397 2398 int 2399 puffs_vnop_mmap(void *v) 2400 { 2401 struct vop_mmap_args /* { 2402 const struct vnodeop_desc *a_desc; 2403 struct vnode *a_vp; 2404 vm_prot_t a_prot; 2405 kauth_cred_t a_cred; 2406 } */ *ap = v; 2407 PUFFS_MSG_VARS(vn, mmap); 2408 struct vnode *vp = ap->a_vp; 2409 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2410 int error; 2411 2412 if (!PUFFS_USE_PAGECACHE(pmp)) 2413 return genfs_eopnotsupp(v); 2414 2415 if (EXISTSOP(pmp, MMAP)) { 2416 PUFFS_MSG_ALLOC(vn, mmap); 2417 mmap_msg->pvnr_prot = ap->a_prot; 2418 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2419 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2420 PUFFS_VN_MMAP, VPTOPNC(vp)); 2421 2422 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2423 error = checkerr(pmp, error, __func__); 2424 PUFFS_MSG_RELEASE(mmap); 2425 } else { 2426 error = genfs_mmap(v); 2427 } 2428 2429 return error; 2430 } 2431 2432 2433 /* 2434 * The rest don't get a free trip to userspace and back, they 2435 * have to stay within the kernel. 2436 */ 2437 2438 /* 2439 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2440 * well, maybe somehow, somewhere, some day .... 2441 */ 2442 int 2443 puffs_vnop_bmap(void *v) 2444 { 2445 struct vop_bmap_args /* { 2446 const struct vnodeop_desc *a_desc; 2447 struct vnode *a_vp; 2448 daddr_t a_bn; 2449 struct vnode **a_vpp; 2450 daddr_t *a_bnp; 2451 int *a_runp; 2452 } */ *ap = v; 2453 struct puffs_mount *pmp; 2454 2455 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2456 2457 if (ap->a_vpp) 2458 *ap->a_vpp = ap->a_vp; 2459 if (ap->a_bnp) 2460 *ap->a_bnp = ap->a_bn; 2461 if (ap->a_runp) 2462 *ap->a_runp 2463 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2464 2465 return 0; 2466 } 2467 2468 /* 2469 * Handle getpages faults in puffs. We let genfs_getpages() do most 2470 * of the dirty work, but we come in this route to do accounting tasks. 2471 * If the user server has specified functions for cache notifications 2472 * about reads and/or writes, we record which type of operation we got, 2473 * for which page range, and proceed to issue a FAF notification to the 2474 * server about it. 2475 */ 2476 int 2477 puffs_vnop_getpages(void *v) 2478 { 2479 struct vop_getpages_args /* { 2480 const struct vnodeop_desc *a_desc; 2481 struct vnode *a_vp; 2482 voff_t a_offset; 2483 struct vm_page **a_m; 2484 int *a_count; 2485 int a_centeridx; 2486 vm_prot_t a_access_type; 2487 int a_advice; 2488 int a_flags; 2489 } */ *ap = v; 2490 struct puffs_mount *pmp; 2491 struct puffs_node *pn; 2492 struct vnode *vp; 2493 struct vm_page **pgs; 2494 struct puffs_cacheinfo *pcinfo = NULL; 2495 struct puffs_cacherun *pcrun; 2496 void *parkmem = NULL; 2497 size_t runsizes; 2498 int i, npages, si, streakon; 2499 int error, locked, write; 2500 2501 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2502 npages = *ap->a_count; 2503 pgs = ap->a_m; 2504 vp = ap->a_vp; 2505 pn = vp->v_data; 2506 locked = (ap->a_flags & PGO_LOCKED) != 0; 2507 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2508 2509 /* ccg xnaht - gets Wuninitialized wrong */ 2510 pcrun = NULL; 2511 runsizes = 0; 2512 2513 /* 2514 * Check that we aren't trying to fault in pages which our file 2515 * server doesn't know about. This happens if we extend a file by 2516 * skipping some pages and later try to fault in pages which 2517 * are between pn_serversize and vp_size. This check optimizes 2518 * away the common case where a file is being extended. 2519 */ 2520 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2521 struct vattr va; 2522 2523 /* try again later when we can block */ 2524 if (locked) 2525 ERROUT(EBUSY); 2526 2527 mutex_exit(vp->v_interlock); 2528 vattr_null(&va); 2529 va.va_size = vp->v_size; 2530 error = dosetattr(vp, &va, FSCRED, 0); 2531 if (error) 2532 ERROUT(error); 2533 mutex_enter(vp->v_interlock); 2534 } 2535 2536 if (write && PUFFS_WCACHEINFO(pmp)) { 2537 #ifdef notnowjohn 2538 /* allocate worst-case memory */ 2539 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2540 #ifdef DIAGNOSTIC 2541 if (curlwp == uvm.pagedaemon_lwp) 2542 KASSERT(locked); 2543 #endif 2544 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2545 locked ? KM_NOSLEEP : KM_SLEEP); 2546 2547 /* 2548 * can't block if we're locked and can't mess up caching 2549 * information for fs server. so come back later, please 2550 */ 2551 if (pcinfo == NULL) 2552 ERROUT(ENOMEM); 2553 2554 parkmem = puffs_park_alloc(locked == 0); 2555 if (parkmem == NULL) 2556 ERROUT(ENOMEM); 2557 2558 pcrun = pcinfo->pcache_runs; 2559 #else 2560 (void)parkmem; 2561 #endif 2562 } 2563 2564 error = genfs_getpages(v); 2565 if (error) 2566 goto out; 2567 2568 if (PUFFS_WCACHEINFO(pmp) == 0) 2569 goto out; 2570 2571 /* 2572 * Let's see whose fault it was and inform the user server of 2573 * possibly read/written pages. Map pages from read faults 2574 * strictly read-only, since otherwise we might miss info on 2575 * when the page is actually write-faulted to. 2576 */ 2577 if (!locked) 2578 mutex_enter(vp->v_uobj.vmobjlock); 2579 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2580 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2581 if (streakon && write) { 2582 streakon = 0; 2583 pcrun[si].pcache_runend 2584 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2585 si++; 2586 } 2587 continue; 2588 } 2589 if (streakon == 0 && write) { 2590 streakon = 1; 2591 pcrun[si].pcache_runstart = pgs[i]->offset; 2592 } 2593 2594 if (!write) 2595 pgs[i]->flags |= PG_RDONLY; 2596 } 2597 /* was the last page part of our streak? */ 2598 if (streakon) { 2599 pcrun[si].pcache_runend 2600 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2601 si++; 2602 } 2603 if (!locked) 2604 mutex_exit(vp->v_uobj.vmobjlock); 2605 2606 KASSERT(si <= (npages / 2) + 1); 2607 2608 #ifdef notnowjohn 2609 /* send results to userspace */ 2610 if (write) 2611 puffs_cacheop(pmp, parkmem, pcinfo, 2612 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2613 #endif 2614 2615 out: 2616 if (error) { 2617 if (pcinfo != NULL) 2618 kmem_free(pcinfo, 2619 sizeof(struct puffs_cacheinfo) + runsizes); 2620 #ifdef notnowjohn 2621 if (parkmem != NULL) 2622 puffs_park_release(parkmem, 1); 2623 #endif 2624 } 2625 2626 return error; 2627 } 2628 2629 /* 2630 * Extended attribute support. 2631 */ 2632 2633 int 2634 puffs_vnop_getextattr(void *v) 2635 { 2636 struct vop_getextattr_args /* 2637 struct vnode *a_vp; 2638 int a_attrnamespace; 2639 const char *a_name; 2640 struct uio *a_uio; 2641 size_t *a_size; 2642 kauth_cred_t a_cred; 2643 }; */ *ap = v; 2644 PUFFS_MSG_VARS(vn, getextattr); 2645 struct vnode *vp = ap->a_vp; 2646 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2647 int attrnamespace = ap->a_attrnamespace; 2648 const char *name = ap->a_name; 2649 struct uio *uio = ap->a_uio; 2650 size_t *sizep = ap->a_size; 2651 size_t tomove, resid; 2652 int error; 2653 2654 if (uio) 2655 resid = uio->uio_resid; 2656 else 2657 resid = 0; 2658 2659 tomove = PUFFS_TOMOVE(resid, pmp); 2660 if (tomove != resid) { 2661 error = E2BIG; 2662 goto out; 2663 } 2664 2665 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2666 &park_getextattr, (void *)&getextattr_msg, 1); 2667 2668 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2669 strlcpy(getextattr_msg->pvnr_attrname, name, 2670 sizeof(getextattr_msg->pvnr_attrname)); 2671 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2672 if (sizep) 2673 getextattr_msg->pvnr_datasize = 1; 2674 getextattr_msg->pvnr_resid = tomove; 2675 2676 puffs_msg_setinfo(park_getextattr, 2677 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2678 puffs_msg_setdelta(park_getextattr, tomove); 2679 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2680 2681 error = checkerr(pmp, error, __func__); 2682 if (error) 2683 goto out; 2684 2685 resid = getextattr_msg->pvnr_resid; 2686 if (resid > tomove) { 2687 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2688 "resid grew", VPTOPNC(vp)); 2689 error = EPROTO; 2690 goto out; 2691 } 2692 2693 if (sizep) 2694 *sizep = getextattr_msg->pvnr_datasize; 2695 if (uio) 2696 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2697 2698 out: 2699 PUFFS_MSG_RELEASE(getextattr); 2700 return error; 2701 } 2702 2703 int 2704 puffs_vnop_setextattr(void *v) 2705 { 2706 struct vop_setextattr_args /* { 2707 struct vnode *a_vp; 2708 int a_attrnamespace; 2709 const char *a_name; 2710 struct uio *a_uio; 2711 kauth_cred_t a_cred; 2712 }; */ *ap = v; 2713 PUFFS_MSG_VARS(vn, setextattr); 2714 struct vnode *vp = ap->a_vp; 2715 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2716 int attrnamespace = ap->a_attrnamespace; 2717 const char *name = ap->a_name; 2718 struct uio *uio = ap->a_uio; 2719 size_t tomove, resid; 2720 int error; 2721 2722 if (uio) 2723 resid = uio->uio_resid; 2724 else 2725 resid = 0; 2726 2727 tomove = PUFFS_TOMOVE(resid, pmp); 2728 if (tomove != resid) { 2729 error = E2BIG; 2730 goto out; 2731 } 2732 2733 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2734 &park_setextattr, (void *)&setextattr_msg, 1); 2735 2736 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2737 strlcpy(setextattr_msg->pvnr_attrname, name, 2738 sizeof(setextattr_msg->pvnr_attrname)); 2739 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2740 setextattr_msg->pvnr_resid = tomove; 2741 2742 if (uio) { 2743 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2744 if (error) 2745 goto out; 2746 } 2747 2748 puffs_msg_setinfo(park_setextattr, 2749 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 2750 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 2751 2752 error = checkerr(pmp, error, __func__); 2753 if (error) 2754 goto out; 2755 2756 if (setextattr_msg->pvnr_resid != 0) 2757 error = EIO; 2758 2759 out: 2760 PUFFS_MSG_RELEASE(setextattr); 2761 2762 return error; 2763 } 2764 2765 int 2766 puffs_vnop_listextattr(void *v) 2767 { 2768 struct vop_listextattr_args /* { 2769 struct vnode *a_vp; 2770 int a_attrnamespace; 2771 struct uio *a_uio; 2772 size_t *a_size; 2773 int a_flag, 2774 kauth_cred_t a_cred; 2775 }; */ *ap = v; 2776 PUFFS_MSG_VARS(vn, listextattr); 2777 struct vnode *vp = ap->a_vp; 2778 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2779 int attrnamespace = ap->a_attrnamespace; 2780 struct uio *uio = ap->a_uio; 2781 size_t *sizep = ap->a_size; 2782 int flag = ap->a_flag; 2783 size_t tomove, resid; 2784 int error; 2785 2786 if (uio) 2787 resid = uio->uio_resid; 2788 else 2789 resid = 0; 2790 2791 tomove = PUFFS_TOMOVE(resid, pmp); 2792 if (tomove != resid) { 2793 error = E2BIG; 2794 goto out; 2795 } 2796 2797 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 2798 &park_listextattr, (void *)&listextattr_msg, 1); 2799 2800 listextattr_msg->pvnr_attrnamespace = attrnamespace; 2801 listextattr_msg->pvnr_flag = flag; 2802 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 2803 listextattr_msg->pvnr_resid = tomove; 2804 if (sizep) 2805 listextattr_msg->pvnr_datasize = 1; 2806 2807 puffs_msg_setinfo(park_listextattr, 2808 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 2809 puffs_msg_setdelta(park_listextattr, tomove); 2810 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 2811 2812 error = checkerr(pmp, error, __func__); 2813 if (error) 2814 goto out; 2815 2816 resid = listextattr_msg->pvnr_resid; 2817 if (resid > tomove) { 2818 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 2819 "resid grew", VPTOPNC(vp)); 2820 error = EPROTO; 2821 goto out; 2822 } 2823 2824 if (sizep) 2825 *sizep = listextattr_msg->pvnr_datasize; 2826 if (uio) 2827 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 2828 2829 out: 2830 PUFFS_MSG_RELEASE(listextattr); 2831 return error; 2832 } 2833 2834 int 2835 puffs_vnop_deleteextattr(void *v) 2836 { 2837 struct vop_deleteextattr_args /* { 2838 struct vnode *a_vp; 2839 int a_attrnamespace; 2840 const char *a_name; 2841 kauth_cred_t a_cred; 2842 }; */ *ap = v; 2843 PUFFS_MSG_VARS(vn, deleteextattr); 2844 struct vnode *vp = ap->a_vp; 2845 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2846 int attrnamespace = ap->a_attrnamespace; 2847 const char *name = ap->a_name; 2848 int error; 2849 2850 PUFFS_MSG_ALLOC(vn, deleteextattr); 2851 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 2852 strlcpy(deleteextattr_msg->pvnr_attrname, name, 2853 sizeof(deleteextattr_msg->pvnr_attrname)); 2854 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 2855 2856 puffs_msg_setinfo(park_deleteextattr, 2857 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 2858 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 2859 vp->v_data, NULL, error); 2860 2861 error = checkerr(pmp, error, __func__); 2862 2863 PUFFS_MSG_RELEASE(deleteextattr); 2864 return error; 2865 } 2866 2867 /* 2868 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2869 * FAF update information for the puffs node first. 2870 */ 2871 int 2872 puffs_vnop_spec_read(void *v) 2873 { 2874 struct vop_read_args /* { 2875 const struct vnodeop_desc *a_desc; 2876 struct vnode *a_vp; 2877 struct uio *a_uio; 2878 int a_ioflag; 2879 kauth_cred_t a_cred; 2880 } */ *ap = v; 2881 2882 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2883 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2884 } 2885 2886 int 2887 puffs_vnop_spec_write(void *v) 2888 { 2889 struct vop_write_args /* { 2890 const struct vnodeop_desc *a_desc; 2891 struct vnode *a_vp; 2892 struct uio *a_uio; 2893 int a_ioflag; 2894 kauth_cred_t a_cred; 2895 } */ *ap = v; 2896 2897 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2898 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2899 } 2900 2901 int 2902 puffs_vnop_fifo_read(void *v) 2903 { 2904 struct vop_read_args /* { 2905 const struct vnodeop_desc *a_desc; 2906 struct vnode *a_vp; 2907 struct uio *a_uio; 2908 int a_ioflag; 2909 kauth_cred_t a_cred; 2910 } */ *ap = v; 2911 2912 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2913 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2914 } 2915 2916 int 2917 puffs_vnop_fifo_write(void *v) 2918 { 2919 struct vop_write_args /* { 2920 const struct vnodeop_desc *a_desc; 2921 struct vnode *a_vp; 2922 struct uio *a_uio; 2923 int a_ioflag; 2924 kauth_cred_t a_cred; 2925 } */ *ap = v; 2926 2927 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2928 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2929 } 2930
Indexes created Thu Oct 02 01:09:59 GMT 2025