puffs_vnops.c revision 1.166
1 /* $NetBSD: puffs_vnops.c,v 1.166 2012/04/18 00:42:50 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 1.166 2012/04/18 00:42:50 manu Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, hardclock_ticks */ 44 45 #include <uvm/uvm.h> 46 47 #include <fs/puffs/puffs_msgif.h> 48 #include <fs/puffs/puffs_sys.h> 49 50 #include <miscfs/fifofs/fifo.h> 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> 53 54 int puffs_vnop_lookup(void *); 55 int puffs_vnop_create(void *); 56 int puffs_vnop_access(void *); 57 int puffs_vnop_mknod(void *); 58 int puffs_vnop_open(void *); 59 int puffs_vnop_close(void *); 60 int puffs_vnop_getattr(void *); 61 int puffs_vnop_setattr(void *); 62 int puffs_vnop_reclaim(void *); 63 int puffs_vnop_readdir(void *); 64 int puffs_vnop_poll(void *); 65 int puffs_vnop_fsync(void *); 66 int puffs_vnop_seek(void *); 67 int puffs_vnop_remove(void *); 68 int puffs_vnop_mkdir(void *); 69 int puffs_vnop_rmdir(void *); 70 int puffs_vnop_link(void *); 71 int puffs_vnop_readlink(void *); 72 int puffs_vnop_symlink(void *); 73 int puffs_vnop_rename(void *); 74 int puffs_vnop_read(void *); 75 int puffs_vnop_write(void *); 76 int puffs_vnop_fcntl(void *); 77 int puffs_vnop_ioctl(void *); 78 int puffs_vnop_inactive(void *); 79 int puffs_vnop_print(void *); 80 int puffs_vnop_pathconf(void *); 81 int puffs_vnop_advlock(void *); 82 int puffs_vnop_strategy(void *); 83 int puffs_vnop_bmap(void *); 84 int puffs_vnop_mmap(void *); 85 int puffs_vnop_getpages(void *); 86 int puffs_vnop_abortop(void *); 87 int puffs_vnop_getextattr(void *); 88 int puffs_vnop_setextattr(void *); 89 int puffs_vnop_listextattr(void *); 90 int puffs_vnop_deleteextattr(void *); 91 92 int puffs_vnop_spec_read(void *); 93 int puffs_vnop_spec_write(void *); 94 int puffs_vnop_fifo_read(void *); 95 int puffs_vnop_fifo_write(void *); 96 97 int puffs_vnop_checkop(void *); 98 99 #define puffs_vnop_lock genfs_lock 100 #define puffs_vnop_unlock genfs_unlock 101 #define puffs_vnop_islocked genfs_islocked 102 103 int (**puffs_vnodeop_p)(void *); 104 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 107 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 108 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 109 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 110 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 111 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 112 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 113 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 114 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 115 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 116 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 117 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 118 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 119 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 120 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 121 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 122 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 123 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 124 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 125 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 126 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 127 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 128 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 129 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 130 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 131 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 132 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 133 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 134 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 135 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 136 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 137 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 138 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 139 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 140 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 141 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 142 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 143 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 144 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 145 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 146 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 147 #if 0 148 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 149 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 150 #endif 151 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 152 { NULL, NULL } 153 }; 154 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 155 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 156 157 158 int (**puffs_specop_p)(void *); 159 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 160 { &vop_default_desc, vn_default_error }, 161 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 162 { &vop_create_desc, spec_create }, /* genfs_badop */ 163 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 164 { &vop_open_desc, spec_open }, /* spec_open */ 165 { &vop_close_desc, spec_close }, /* spec_close */ 166 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 167 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 168 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 169 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 170 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 202 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 203 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 204 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 205 #if 0 206 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 207 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 220 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 221 { &vop_open_desc, vn_fifo_bypass }, /* open */ 222 { &vop_close_desc, vn_fifo_bypass }, /* close */ 223 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 228 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 229 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 230 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 231 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 232 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 233 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 234 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 235 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 236 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 237 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 238 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 239 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 241 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 246 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 247 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 248 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 249 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 250 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 252 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 253 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 254 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 257 #if 0 258 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 259 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 260 #endif 261 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 262 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 263 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 264 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 265 { NULL, NULL } 266 }; 267 const struct vnodeopv_desc puffs_fifoop_opv_desc = 268 { &puffs_fifoop_p, puffs_fifoop_entries }; 269 270 271 /* "real" vnode operations */ 272 int (**puffs_msgop_p)(void *); 273 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 274 { &vop_default_desc, vn_default_error }, 275 { &vop_create_desc, puffs_vnop_create }, /* create */ 276 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 277 { &vop_open_desc, puffs_vnop_open }, /* open */ 278 { &vop_close_desc, puffs_vnop_close }, /* close */ 279 { &vop_access_desc, puffs_vnop_access }, /* access */ 280 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 281 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 282 { &vop_read_desc, puffs_vnop_read }, /* read */ 283 { &vop_write_desc, puffs_vnop_write }, /* write */ 284 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 285 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 286 { &vop_link_desc, puffs_vnop_link }, /* link */ 287 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 288 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 289 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 290 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 291 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 292 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 293 { &vop_print_desc, puffs_vnop_print }, /* print */ 294 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 295 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 296 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 297 { NULL, NULL } 298 }; 299 const struct vnodeopv_desc puffs_msgop_opv_desc = 300 { &puffs_msgop_p, puffs_msgop_entries }; 301 302 /* 303 * for dosetattr / update_va 304 */ 305 #define SETATTR_CHSIZE 0x01 306 #define SETATTR_ASYNC 0x02 307 308 #define ERROUT(err) \ 309 do { \ 310 error = err; \ 311 goto out; \ 312 } while (/*CONSTCOND*/0) 313 314 /* 315 * This is a generic vnode operation handler. It checks if the necessary 316 * operations for the called vnode operation are implemented by userspace 317 * and either returns a dummy return value or proceeds to call the real 318 * vnode operation from puffs_msgop_v. 319 * 320 * XXX: this should described elsewhere and autogenerated, the complexity 321 * of the vnode operations vectors and their interrelationships is also 322 * getting a bit out of hand. Another problem is that we need this same 323 * information in the fs server code, so keeping the two in sync manually 324 * is not a viable (long term) plan. 325 */ 326 327 /* not supported, handle locking protocol */ 328 #define CHECKOP_NOTSUPP(op) \ 329 case VOP_##op##_DESCOFFSET: \ 330 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 331 return genfs_eopnotsupp(v); \ 332 break 333 334 /* always succeed, no locking */ 335 #define CHECKOP_SUCCESS(op) \ 336 case VOP_##op##_DESCOFFSET: \ 337 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 338 return 0; \ 339 break 340 341 int 342 puffs_vnop_checkop(void *v) 343 { 344 struct vop_generic_args /* { 345 struct vnodeop_desc *a_desc; 346 spooky mystery contents; 347 } */ *ap = v; 348 struct vnodeop_desc *desc = ap->a_desc; 349 struct puffs_mount *pmp; 350 struct vnode *vp; 351 int offset, rv; 352 353 offset = ap->a_desc->vdesc_vp_offsets[0]; 354 #ifdef DIAGNOSTIC 355 if (offset == VDESC_NO_OFFSET) 356 panic("puffs_checkop: no vnode, why did you call me?"); 357 #endif 358 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 359 pmp = MPTOPUFFSMP(vp->v_mount); 360 361 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 362 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 363 364 if (!ALLOPS(pmp)) { 365 switch (desc->vdesc_offset) { 366 CHECKOP_NOTSUPP(CREATE); 367 CHECKOP_NOTSUPP(MKNOD); 368 CHECKOP_NOTSUPP(GETATTR); 369 CHECKOP_NOTSUPP(SETATTR); 370 CHECKOP_NOTSUPP(READ); 371 CHECKOP_NOTSUPP(WRITE); 372 CHECKOP_NOTSUPP(FCNTL); 373 CHECKOP_NOTSUPP(IOCTL); 374 CHECKOP_NOTSUPP(REMOVE); 375 CHECKOP_NOTSUPP(LINK); 376 CHECKOP_NOTSUPP(RENAME); 377 CHECKOP_NOTSUPP(MKDIR); 378 CHECKOP_NOTSUPP(RMDIR); 379 CHECKOP_NOTSUPP(SYMLINK); 380 CHECKOP_NOTSUPP(READDIR); 381 CHECKOP_NOTSUPP(READLINK); 382 CHECKOP_NOTSUPP(PRINT); 383 CHECKOP_NOTSUPP(PATHCONF); 384 CHECKOP_NOTSUPP(GETEXTATTR); 385 CHECKOP_NOTSUPP(SETEXTATTR); 386 CHECKOP_NOTSUPP(LISTEXTATTR); 387 CHECKOP_NOTSUPP(DELETEEXTATTR); 388 389 CHECKOP_SUCCESS(ACCESS); 390 CHECKOP_SUCCESS(CLOSE); 391 CHECKOP_SUCCESS(SEEK); 392 393 case VOP_GETPAGES_DESCOFFSET: 394 if (!EXISTSOP(pmp, READ)) 395 return genfs_eopnotsupp(v); 396 break; 397 398 default: 399 panic("puffs_checkop: unhandled vnop %d", 400 desc->vdesc_offset); 401 } 402 } 403 404 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 405 406 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 407 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 408 409 return rv; 410 } 411 412 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 413 struct componentname *); 414 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 415 struct componentname *); 416 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 417 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 418 static int flushvncache(struct vnode *, off_t, off_t, bool); 419 static void update_va(struct vnode *, struct vattr *, struct vattr *, 420 struct timespec *, struct timespec *, int); 421 422 423 #define PUFFS_ABORT_LOOKUP 1 424 #define PUFFS_ABORT_CREATE 2 425 #define PUFFS_ABORT_MKNOD 3 426 #define PUFFS_ABORT_MKDIR 4 427 #define PUFFS_ABORT_SYMLINK 5 428 429 /* 430 * Press the pani^Wabort button! Kernel resource allocation failed. 431 */ 432 static void 433 puffs_abortbutton(struct puffs_mount *pmp, int what, 434 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 435 { 436 437 switch (what) { 438 case PUFFS_ABORT_CREATE: 439 case PUFFS_ABORT_MKNOD: 440 case PUFFS_ABORT_SYMLINK: 441 callremove(pmp, dck, ck, cnp); 442 break; 443 case PUFFS_ABORT_MKDIR: 444 callrmdir(pmp, dck, ck, cnp); 445 break; 446 } 447 448 callinactive(pmp, ck, 0); 449 callreclaim(pmp, ck); 450 } 451 452 /* 453 * Begin vnode operations. 454 * 455 * A word from the keymaster about locks: generally we don't want 456 * to use the vnode locks at all: it creates an ugly dependency between 457 * the userlandia file server and the kernel. But we'll play along with 458 * the kernel vnode locks for now. However, even currently we attempt 459 * to release locks as early as possible. This is possible for some 460 * operations which a) don't need a locked vnode after the userspace op 461 * and b) return with the vnode unlocked. Theoretically we could 462 * unlock-do op-lock for others and order the graph in userspace, but I 463 * don't want to think of the consequences for the time being. 464 */ 465 466 #define TTL_TO_TIMEOUT(ts) \ 467 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 468 #define TTL_VALID(ts) \ 469 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 470 #define TIMED_OUT(expire) \ 471 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 472 int 473 puffs_vnop_lookup(void *v) 474 { 475 struct vop_lookup_args /* { 476 const struct vnodeop_desc *a_desc; 477 struct vnode *a_dvp; 478 struct vnode **a_vpp; 479 struct componentname *a_cnp; 480 } */ *ap = v; 481 PUFFS_MSG_VARS(vn, lookup); 482 struct puffs_mount *pmp; 483 struct componentname *cnp; 484 struct vnode *vp, *dvp, *cvp; 485 struct puffs_node *dpn, *cpn; 486 int isdot; 487 int error; 488 489 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 490 cnp = ap->a_cnp; 491 dvp = ap->a_dvp; 492 cvp = NULL; 493 cpn = NULL; 494 *ap->a_vpp = NULL; 495 496 /* r/o fs? we check create later to handle EEXIST */ 497 if ((cnp->cn_flags & ISLASTCN) 498 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 499 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 500 return EROFS; 501 502 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 503 504 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 505 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 506 507 /* 508 * Check if someone fed it into the cache 509 */ 510 if (PUFFS_USE_NAMECACHE(pmp)) { 511 error = cache_lookup(dvp, ap->a_vpp, cnp); 512 513 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 514 515 cvp = *ap->a_vpp; 516 cpn = VPTOPP(cvp); 517 if (TIMED_OUT(cpn->pn_cn_timeout)) { 518 cache_purge1(cvp, NULL, PURGE_CHILDREN); 519 520 /* 521 * cached vnode (cvp) is still locked 522 * so that we can reuse it upon a new 523 * successful lookup. 524 */ 525 *ap->a_vpp = NULL; 526 error = -1; 527 } 528 } 529 530 /* 531 * Do not use negative caching, since the filesystem 532 * provides no TTL for it. 533 */ 534 if ((error == ENOENT) && PUFFS_USE_FS_TTL(pmp)) 535 error = -1; 536 537 if (error >= 0) 538 return error; 539 } 540 541 if (isdot) { 542 /* deal with rename lookup semantics */ 543 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 544 return EISDIR; 545 546 if (cvp != NULL) 547 vput(cvp); 548 549 vp = ap->a_dvp; 550 vref(vp); 551 *ap->a_vpp = vp; 552 return 0; 553 } 554 555 if (cvp != NULL) 556 mutex_enter(&cpn->pn_sizemtx); 557 558 PUFFS_MSG_ALLOC(vn, lookup); 559 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 560 cnp, PUFFS_USE_FULLPNBUF(pmp)); 561 562 if (cnp->cn_flags & ISDOTDOT) 563 VOP_UNLOCK(dvp); 564 565 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 566 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 567 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 568 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 569 570 /* 571 * In case of error, there is no new vnode to play with, so be 572 * happy with the NULL value given to vpp in the beginning. 573 * Also, check if this really was an error or the target was not 574 * present. Either treat it as a non-error for CREATE/RENAME or 575 * enter the component into the negative name cache (if desired). 576 */ 577 if (error) { 578 error = checkerr(pmp, error, __func__); 579 if (error == ENOENT) { 580 /* don't allow to create files on r/o fs */ 581 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 582 && cnp->cn_nameiop == CREATE) { 583 error = EROFS; 584 585 /* adjust values if we are creating */ 586 } else if ((cnp->cn_flags & ISLASTCN) 587 && (cnp->cn_nameiop == CREATE 588 || cnp->cn_nameiop == RENAME)) { 589 error = EJUSTRETURN; 590 591 /* save negative cache entry */ 592 } else { 593 if ((cnp->cn_flags & MAKEENTRY) 594 && PUFFS_USE_NAMECACHE(pmp) 595 && !PUFFS_USE_FS_TTL(pmp)) 596 cache_enter(dvp, NULL, cnp); 597 } 598 } 599 goto out; 600 } 601 602 /* 603 * Check that we don't get our parent node back, that would cause 604 * a pretty obvious deadlock. 605 */ 606 dpn = dvp->v_data; 607 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 608 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 609 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 610 error = EPROTO; 611 goto out; 612 } 613 614 /* 615 * On successfull relookup, do not create a new node. 616 */ 617 if (cvp != NULL) { 618 vp = cvp; 619 } else { 620 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 621 1, 1, &vp); 622 623 if (error == PUFFS_NOSUCHCOOKIE) { 624 error = puffs_getvnode(dvp->v_mount, 625 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 626 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 627 if (error) { 628 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 629 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 630 ap->a_cnp); 631 goto out; 632 } 633 634 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 635 } else if (error) { 636 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 637 lookup_msg->pvnr_newnode, ap->a_cnp); 638 goto out; 639 } 640 } 641 642 /* 643 * Update cache and TTL 644 */ 645 if (PUFFS_USE_FS_TTL(pmp)) { 646 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 647 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 648 update_va(vp, NULL, &lookup_msg->pvnr_va, 649 va_ttl, cn_ttl, SETATTR_CHSIZE); 650 } 651 652 *ap->a_vpp = vp; 653 654 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 655 cache_enter(dvp, vp, cnp); 656 657 /* XXX */ 658 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 659 cnp->cn_flags &= ~REQUIREDIR; 660 if (lookup_msg->pvnr_cn.pkcn_consume) 661 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 662 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 663 664 out: 665 if (cvp != NULL) { 666 mutex_exit(&cpn->pn_sizemtx); 667 /* 668 * We had a cached vnode but new lookup failed, 669 * unlock it and let it die now. 670 */ 671 if (error != 0) 672 vput(cvp); 673 } 674 675 if (cnp->cn_flags & ISDOTDOT) 676 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 677 678 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 679 PUFFS_MSG_RELEASE(lookup); 680 return error; 681 } 682 683 #define REFPN_AND_UNLOCKVP(a, b) \ 684 do { \ 685 mutex_enter(&b->pn_mtx); \ 686 puffs_referencenode(b); \ 687 mutex_exit(&b->pn_mtx); \ 688 VOP_UNLOCK(a); \ 689 } while (/*CONSTCOND*/0) 690 691 #define REFPN(b) \ 692 do { \ 693 mutex_enter(&b->pn_mtx); \ 694 puffs_referencenode(b); \ 695 mutex_exit(&b->pn_mtx); \ 696 } while (/*CONSTCOND*/0) 697 698 #define RELEPN_AND_VP(a, b) \ 699 do { \ 700 puffs_releasenode(b); \ 701 vrele(a); \ 702 } while (/*CONSTCOND*/0) 703 704 int 705 puffs_vnop_create(void *v) 706 { 707 struct vop_create_args /* { 708 const struct vnodeop_desc *a_desc; 709 struct vnode *a_dvp; 710 struct vnode **a_vpp; 711 struct componentname *a_cnp; 712 struct vattr *a_vap; 713 } */ *ap = v; 714 PUFFS_MSG_VARS(vn, create); 715 struct vnode *dvp = ap->a_dvp; 716 struct puffs_node *dpn = VPTOPP(dvp); 717 struct componentname *cnp = ap->a_cnp; 718 struct mount *mp = dvp->v_mount; 719 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 720 int error; 721 722 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 723 dvp, ap->a_cnp->cn_nameptr)); 724 725 PUFFS_MSG_ALLOC(vn, create); 726 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 727 cnp, PUFFS_USE_FULLPNBUF(pmp)); 728 create_msg->pvnr_va = *ap->a_vap; 729 puffs_msg_setinfo(park_create, PUFFSOP_VN, 730 PUFFS_VN_CREATE, VPTOPNC(dvp)); 731 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 732 733 error = checkerr(pmp, error, __func__); 734 if (error) 735 goto out; 736 737 error = puffs_newnode(mp, dvp, ap->a_vpp, 738 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 739 if (error) { 740 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 741 create_msg->pvnr_newnode, cnp); 742 goto out; 743 } 744 745 if (PUFFS_USE_FS_TTL(pmp)) { 746 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 747 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 748 struct vattr *rvap = &create_msg->pvnr_va; 749 750 update_va(*ap->a_vpp, NULL, rvap, 751 va_ttl, cn_ttl, SETATTR_CHSIZE); 752 } 753 754 out: 755 vput(dvp); 756 757 DPRINTF(("puffs_create: return %d\n", error)); 758 PUFFS_MSG_RELEASE(create); 759 return error; 760 } 761 762 int 763 puffs_vnop_mknod(void *v) 764 { 765 struct vop_mknod_args /* { 766 const struct vnodeop_desc *a_desc; 767 struct vnode *a_dvp; 768 struct vnode **a_vpp; 769 struct componentname *a_cnp; 770 struct vattr *a_vap; 771 } */ *ap = v; 772 PUFFS_MSG_VARS(vn, mknod); 773 struct vnode *dvp = ap->a_dvp; 774 struct puffs_node *dpn = VPTOPP(dvp); 775 struct componentname *cnp = ap->a_cnp; 776 struct mount *mp = dvp->v_mount; 777 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 778 int error; 779 780 PUFFS_MSG_ALLOC(vn, mknod); 781 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 782 cnp, PUFFS_USE_FULLPNBUF(pmp)); 783 mknod_msg->pvnr_va = *ap->a_vap; 784 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 785 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 786 787 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 788 789 error = checkerr(pmp, error, __func__); 790 if (error) 791 goto out; 792 793 error = puffs_newnode(mp, dvp, ap->a_vpp, 794 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 795 ap->a_vap->va_rdev); 796 if (error) { 797 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 798 mknod_msg->pvnr_newnode, cnp); 799 goto out; 800 } 801 802 if (PUFFS_USE_FS_TTL(pmp)) { 803 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 804 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 805 struct vattr *rvap = &mknod_msg->pvnr_va; 806 807 update_va(*ap->a_vpp, NULL, rvap, 808 va_ttl, cn_ttl, SETATTR_CHSIZE); 809 } 810 811 out: 812 vput(dvp); 813 PUFFS_MSG_RELEASE(mknod); 814 return error; 815 } 816 817 int 818 puffs_vnop_open(void *v) 819 { 820 struct vop_open_args /* { 821 const struct vnodeop_desc *a_desc; 822 struct vnode *a_vp; 823 int a_mode; 824 kauth_cred_t a_cred; 825 } */ *ap = v; 826 PUFFS_MSG_VARS(vn, open); 827 struct vnode *vp = ap->a_vp; 828 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 829 int mode = ap->a_mode; 830 int error; 831 832 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 833 834 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 835 ERROUT(EROFS); 836 837 if (!EXISTSOP(pmp, OPEN)) 838 ERROUT(0); 839 840 PUFFS_MSG_ALLOC(vn, open); 841 open_msg->pvnr_mode = mode; 842 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 843 puffs_msg_setinfo(park_open, PUFFSOP_VN, 844 PUFFS_VN_OPEN, VPTOPNC(vp)); 845 846 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 847 error = checkerr(pmp, error, __func__); 848 849 out: 850 DPRINTF(("puffs_open: returning %d\n", error)); 851 PUFFS_MSG_RELEASE(open); 852 return error; 853 } 854 855 int 856 puffs_vnop_close(void *v) 857 { 858 struct vop_close_args /* { 859 const struct vnodeop_desc *a_desc; 860 struct vnode *a_vp; 861 int a_fflag; 862 kauth_cred_t a_cred; 863 } */ *ap = v; 864 PUFFS_MSG_VARS(vn, close); 865 struct vnode *vp = ap->a_vp; 866 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 867 868 PUFFS_MSG_ALLOC(vn, close); 869 puffs_msg_setfaf(park_close); 870 close_msg->pvnr_fflag = ap->a_fflag; 871 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 872 puffs_msg_setinfo(park_close, PUFFSOP_VN, 873 PUFFS_VN_CLOSE, VPTOPNC(vp)); 874 875 puffs_msg_enqueue(pmp, park_close); 876 PUFFS_MSG_RELEASE(close); 877 return 0; 878 } 879 880 int 881 puffs_vnop_access(void *v) 882 { 883 struct vop_access_args /* { 884 const struct vnodeop_desc *a_desc; 885 struct vnode *a_vp; 886 int a_mode; 887 kauth_cred_t a_cred; 888 } */ *ap = v; 889 PUFFS_MSG_VARS(vn, access); 890 struct vnode *vp = ap->a_vp; 891 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 892 int mode = ap->a_mode; 893 int error; 894 895 if (mode & VWRITE) { 896 switch (vp->v_type) { 897 case VDIR: 898 case VLNK: 899 case VREG: 900 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 901 || !EXISTSOP(pmp, WRITE)) 902 return EROFS; 903 break; 904 default: 905 break; 906 } 907 } 908 909 if (!EXISTSOP(pmp, ACCESS)) 910 return 0; 911 912 PUFFS_MSG_ALLOC(vn, access); 913 access_msg->pvnr_mode = ap->a_mode; 914 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 915 puffs_msg_setinfo(park_access, PUFFSOP_VN, 916 PUFFS_VN_ACCESS, VPTOPNC(vp)); 917 918 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 919 error = checkerr(pmp, error, __func__); 920 PUFFS_MSG_RELEASE(access); 921 922 return error; 923 } 924 925 static void 926 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 927 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 928 { 929 struct puffs_node *pn = VPTOPP(vp); 930 931 if (TTL_VALID(cn_ttl)) 932 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 933 934 /* 935 * Don't listen to the file server regarding special device 936 * size info, the file server doesn't know anything about them. 937 */ 938 if (vp->v_type == VBLK || vp->v_type == VCHR) 939 rvap->va_size = vp->v_size; 940 941 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 942 if (vp->v_type == VBLK) 943 rvap->va_blocksize = BLKDEV_IOSIZE; 944 else if (vp->v_type == VCHR) 945 rvap->va_blocksize = MAXBSIZE; 946 947 if (vap != NULL) { 948 (void) memcpy(vap, rvap, sizeof(struct vattr)); 949 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 950 951 if (pn->pn_stat & PNODE_METACACHE_ATIME) 952 vap->va_atime = pn->pn_mc_atime; 953 if (pn->pn_stat & PNODE_METACACHE_CTIME) 954 vap->va_ctime = pn->pn_mc_ctime; 955 if (pn->pn_stat & PNODE_METACACHE_MTIME) 956 vap->va_mtime = pn->pn_mc_mtime; 957 if (pn->pn_stat & PNODE_METACACHE_SIZE) 958 vap->va_size = pn->pn_mc_size; 959 } 960 961 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 962 if (rvap->va_size != VNOVAL 963 && vp->v_type != VBLK && vp->v_type != VCHR) { 964 uvm_vnp_setsize(vp, rvap->va_size); 965 pn->pn_serversize = rvap->va_size; 966 } 967 } 968 969 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 970 if (pn->pn_va_cache == NULL) 971 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 972 973 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 974 975 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 976 } 977 } 978 979 int 980 puffs_vnop_getattr(void *v) 981 { 982 struct vop_getattr_args /* { 983 const struct vnodeop_desc *a_desc; 984 struct vnode *a_vp; 985 struct vattr *a_vap; 986 kauth_cred_t a_cred; 987 } */ *ap = v; 988 PUFFS_MSG_VARS(vn, getattr); 989 struct vnode *vp = ap->a_vp; 990 struct mount *mp = vp->v_mount; 991 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 992 struct vattr *vap, *rvap; 993 struct puffs_node *pn = VPTOPP(vp); 994 struct timespec *va_ttl = NULL; 995 int error = 0; 996 997 /* 998 * A lock is required so that we do not race with 999 * setattr, write and fsync when changing vp->v_size. 1000 * This is critical, since setting a stall smaler value 1001 * triggers a file truncate in uvm_vnp_setsize(), which 1002 * most of the time means data corruption (a chunk of 1003 * data is replaced by zeroes). This can be removed if 1004 * we decide one day that VOP_GETATTR must operate on 1005 * a locked vnode. 1006 * 1007 * XXX Should be useless now that VOP_GETATTR has been 1008 * fixed to always require a shared lock at least. 1009 */ 1010 mutex_enter(&pn->pn_sizemtx); 1011 1012 REFPN(pn); 1013 vap = ap->a_vap; 1014 1015 if (PUFFS_USE_FS_TTL(pmp)) { 1016 if (!TIMED_OUT(pn->pn_va_timeout)) { 1017 update_va(vp, vap, pn->pn_va_cache, 1018 NULL, NULL, SETATTR_CHSIZE); 1019 goto out2; 1020 } 1021 } 1022 1023 PUFFS_MSG_ALLOC(vn, getattr); 1024 vattr_null(&getattr_msg->pvnr_va); 1025 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1026 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1027 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1028 1029 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1030 error = checkerr(pmp, error, __func__); 1031 if (error) 1032 goto out; 1033 1034 rvap = &getattr_msg->pvnr_va; 1035 1036 if (PUFFS_USE_FS_TTL(pmp)) 1037 va_ttl = &getattr_msg->pvnr_va_ttl; 1038 1039 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1040 1041 out: 1042 PUFFS_MSG_RELEASE(getattr); 1043 1044 out2: 1045 puffs_releasenode(pn); 1046 1047 mutex_exit(&pn->pn_sizemtx); 1048 1049 return error; 1050 } 1051 1052 static int 1053 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1054 { 1055 PUFFS_MSG_VARS(vn, setattr); 1056 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1057 struct puffs_node *pn = vp->v_data; 1058 int error = 0; 1059 1060 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1061 1062 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1063 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1064 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1065 || vap->va_mode != (mode_t)VNOVAL)) 1066 return EROFS; 1067 1068 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1069 && vp->v_type == VREG && vap->va_size != VNOVAL) 1070 return EROFS; 1071 1072 /* 1073 * Flush metacache first. If we are called with some explicit 1074 * parameters, treat them as information overriding metacache 1075 * information. 1076 */ 1077 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1078 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1079 && vap->va_atime.tv_sec == VNOVAL) 1080 vap->va_atime = pn->pn_mc_atime; 1081 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1082 && vap->va_ctime.tv_sec == VNOVAL) 1083 vap->va_ctime = pn->pn_mc_ctime; 1084 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1085 && vap->va_mtime.tv_sec == VNOVAL) 1086 vap->va_mtime = pn->pn_mc_mtime; 1087 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1088 && vap->va_size == VNOVAL) 1089 vap->va_size = pn->pn_mc_size; 1090 1091 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1092 } 1093 1094 /* 1095 * Flush attribute cache so that another thread do 1096 * not get a stale value during the operation. 1097 */ 1098 if (PUFFS_USE_FS_TTL(pmp)) 1099 pn->pn_va_timeout = 0; 1100 1101 PUFFS_MSG_ALLOC(vn, setattr); 1102 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1103 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1104 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1105 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1106 if (flags & SETATTR_ASYNC) 1107 puffs_msg_setfaf(park_setattr); 1108 1109 puffs_msg_enqueue(pmp, park_setattr); 1110 if ((flags & SETATTR_ASYNC) == 0) 1111 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1112 1113 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1114 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1115 struct vattr *rvap = &setattr_msg->pvnr_va; 1116 1117 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1118 } 1119 1120 PUFFS_MSG_RELEASE(setattr); 1121 if ((flags & SETATTR_ASYNC) == 0) { 1122 error = checkerr(pmp, error, __func__); 1123 if (error) 1124 return error; 1125 } else { 1126 error = 0; 1127 } 1128 1129 if (vap->va_size != VNOVAL) { 1130 pn->pn_serversize = vap->va_size; 1131 if (flags & SETATTR_CHSIZE) 1132 uvm_vnp_setsize(vp, vap->va_size); 1133 } 1134 1135 return 0; 1136 } 1137 1138 int 1139 puffs_vnop_setattr(void *v) 1140 { 1141 struct vop_getattr_args /* { 1142 const struct vnodeop_desc *a_desc; 1143 struct vnode *a_vp; 1144 struct vattr *a_vap; 1145 kauth_cred_t a_cred; 1146 } */ *ap = v; 1147 struct puffs_node *pn = ap->a_vp->v_data; 1148 int error; 1149 1150 mutex_enter(&pn->pn_sizemtx); 1151 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1152 mutex_exit(&pn->pn_sizemtx); 1153 1154 return error; 1155 } 1156 1157 static __inline int 1158 doinact(struct puffs_mount *pmp, int iaflag) 1159 { 1160 1161 if (EXISTSOP(pmp, INACTIVE)) 1162 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1163 if (iaflag || ALLOPS(pmp)) 1164 return 1; 1165 else 1166 return 0; 1167 else 1168 return 1; 1169 else 1170 return 0; 1171 } 1172 1173 static void 1174 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1175 { 1176 int error; 1177 PUFFS_MSG_VARS(vn, inactive); 1178 1179 if (doinact(pmp, iaflag)) { 1180 PUFFS_MSG_ALLOC(vn, inactive); 1181 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1182 PUFFS_VN_INACTIVE, ck); 1183 1184 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1185 PUFFS_MSG_RELEASE(inactive); 1186 } 1187 } 1188 1189 /* XXX: callinactive can't setback */ 1190 int 1191 puffs_vnop_inactive(void *v) 1192 { 1193 struct vop_inactive_args /* { 1194 const struct vnodeop_desc *a_desc; 1195 struct vnode *a_vp; 1196 } */ *ap = v; 1197 PUFFS_MSG_VARS(vn, inactive); 1198 struct vnode *vp = ap->a_vp; 1199 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1200 struct puffs_node *pnode; 1201 int error; 1202 1203 pnode = vp->v_data; 1204 mutex_enter(&pnode->pn_sizemtx); 1205 1206 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1207 flushvncache(vp, 0, 0, false); 1208 PUFFS_MSG_ALLOC(vn, inactive); 1209 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1210 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1211 1212 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1213 NULL, error); 1214 PUFFS_MSG_RELEASE(inactive); 1215 } 1216 pnode->pn_stat &= ~PNODE_DOINACT; 1217 1218 /* 1219 * file server thinks it's gone? then don't be afraid care, 1220 * node's life was already all it would ever be 1221 */ 1222 if (pnode->pn_stat & PNODE_NOREFS) { 1223 pnode->pn_stat |= PNODE_DYING; 1224 *ap->a_recycle = true; 1225 } 1226 1227 mutex_exit(&pnode->pn_sizemtx); 1228 VOP_UNLOCK(vp); 1229 1230 return 0; 1231 } 1232 1233 static void 1234 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1235 { 1236 PUFFS_MSG_VARS(vn, reclaim); 1237 1238 if (!EXISTSOP(pmp, RECLAIM)) 1239 return; 1240 1241 PUFFS_MSG_ALLOC(vn, reclaim); 1242 puffs_msg_setfaf(park_reclaim); 1243 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1244 1245 puffs_msg_enqueue(pmp, park_reclaim); 1246 PUFFS_MSG_RELEASE(reclaim); 1247 } 1248 1249 /* 1250 * always FAF, we don't really care if the server wants to fail to 1251 * reclaim the node or not 1252 */ 1253 int 1254 puffs_vnop_reclaim(void *v) 1255 { 1256 struct vop_reclaim_args /* { 1257 const struct vnodeop_desc *a_desc; 1258 struct vnode *a_vp; 1259 } */ *ap = v; 1260 struct vnode *vp = ap->a_vp; 1261 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1262 struct puffs_node *pnode = vp->v_data; 1263 bool notifyserver = true; 1264 1265 /* 1266 * first things first: check if someone is trying to reclaim the 1267 * root vnode. do not allow that to travel to userspace. 1268 * Note that we don't need to take the lock similarly to 1269 * puffs_root(), since there is only one of us. 1270 */ 1271 if (vp->v_vflag & VV_ROOT) { 1272 mutex_enter(&pmp->pmp_lock); 1273 KASSERT(pmp->pmp_root != NULL); 1274 pmp->pmp_root = NULL; 1275 mutex_exit(&pmp->pmp_lock); 1276 notifyserver = false; 1277 } 1278 1279 /* 1280 * purge info from kernel before issueing FAF, since we 1281 * don't really know when we'll get around to it after 1282 * that and someone might race us into node creation 1283 */ 1284 mutex_enter(&pmp->pmp_lock); 1285 LIST_REMOVE(pnode, pn_hashent); 1286 mutex_exit(&pmp->pmp_lock); 1287 1288 if (notifyserver) 1289 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1290 1291 puffs_putvnode(vp); 1292 vp->v_data = NULL; 1293 1294 return 0; 1295 } 1296 1297 #define CSIZE sizeof(**ap->a_cookies) 1298 int 1299 puffs_vnop_readdir(void *v) 1300 { 1301 struct vop_readdir_args /* { 1302 const struct vnodeop_desc *a_desc; 1303 struct vnode *a_vp; 1304 struct uio *a_uio; 1305 kauth_cred_t a_cred; 1306 int *a_eofflag; 1307 off_t **a_cookies; 1308 int *a_ncookies; 1309 } */ *ap = v; 1310 PUFFS_MSG_VARS(vn, readdir); 1311 struct vnode *vp = ap->a_vp; 1312 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1313 size_t argsize, tomove, cookiemem, cookiesmax; 1314 struct uio *uio = ap->a_uio; 1315 size_t howmuch, resid; 1316 int error; 1317 1318 /* 1319 * ok, so we need: resid + cookiemem = maxreq 1320 * => resid + cookiesize * (resid/minsize) = maxreq 1321 * => resid + cookiesize/minsize * resid = maxreq 1322 * => (cookiesize/minsize + 1) * resid = maxreq 1323 * => resid = maxreq / (cookiesize/minsize + 1) 1324 * 1325 * Since cookiesize <= minsize and we're not very big on floats, 1326 * we approximate that to be 1. Therefore: 1327 * 1328 * resid = maxreq / 2; 1329 * 1330 * Well, at least we didn't have to use differential equations 1331 * or the Gram-Schmidt process. 1332 * 1333 * (yes, I'm very afraid of this) 1334 */ 1335 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1336 1337 if (ap->a_cookies) { 1338 KASSERT(ap->a_ncookies != NULL); 1339 if (pmp->pmp_args.pa_fhsize == 0) 1340 return EOPNOTSUPP; 1341 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1342 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1343 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1344 } else { 1345 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1346 cookiesmax = 0; 1347 cookiemem = 0; 1348 } 1349 1350 argsize = sizeof(struct puffs_vnmsg_readdir); 1351 tomove = resid + cookiemem; 1352 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1353 (void *)&readdir_msg, 1); 1354 1355 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1356 readdir_msg->pvnr_offset = uio->uio_offset; 1357 readdir_msg->pvnr_resid = resid; 1358 readdir_msg->pvnr_ncookies = cookiesmax; 1359 readdir_msg->pvnr_eofflag = 0; 1360 readdir_msg->pvnr_dentoff = cookiemem; 1361 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1362 PUFFS_VN_READDIR, VPTOPNC(vp)); 1363 puffs_msg_setdelta(park_readdir, tomove); 1364 1365 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1366 error = checkerr(pmp, error, __func__); 1367 if (error) 1368 goto out; 1369 1370 /* userspace is cheating? */ 1371 if (readdir_msg->pvnr_resid > resid) { 1372 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1373 "resid grew", VPTOPNC(vp)); 1374 ERROUT(EPROTO); 1375 } 1376 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1377 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1378 "too many cookies", VPTOPNC(vp)); 1379 ERROUT(EPROTO); 1380 } 1381 1382 /* check eof */ 1383 if (readdir_msg->pvnr_eofflag) 1384 *ap->a_eofflag = 1; 1385 1386 /* bouncy-wouncy with the directory data */ 1387 howmuch = resid - readdir_msg->pvnr_resid; 1388 1389 /* force eof if no data was returned (getcwd() needs this) */ 1390 if (howmuch == 0) { 1391 *ap->a_eofflag = 1; 1392 goto out; 1393 } 1394 1395 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1396 if (error) 1397 goto out; 1398 1399 /* provide cookies to caller if so desired */ 1400 if (ap->a_cookies) { 1401 KASSERT(curlwp != uvm.pagedaemon_lwp); 1402 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1403 M_TEMP, M_WAITOK); 1404 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1405 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1406 *ap->a_ncookies*CSIZE); 1407 } 1408 1409 /* next readdir starts here */ 1410 uio->uio_offset = readdir_msg->pvnr_offset; 1411 1412 out: 1413 puffs_msgmem_release(park_readdir); 1414 return error; 1415 } 1416 #undef CSIZE 1417 1418 /* 1419 * poll works by consuming the bitmask in pn_revents. If there are 1420 * events available, poll returns immediately. If not, it issues a 1421 * poll to userspace, selrecords itself and returns with no available 1422 * events. When the file server returns, it executes puffs_parkdone_poll(), 1423 * where available events are added to the bitmask. selnotify() is 1424 * then also executed by that function causing us to enter here again 1425 * and hopefully find the missing bits (unless someone got them first, 1426 * in which case it starts all over again). 1427 */ 1428 int 1429 puffs_vnop_poll(void *v) 1430 { 1431 struct vop_poll_args /* { 1432 const struct vnodeop_desc *a_desc; 1433 struct vnode *a_vp; 1434 int a_events; 1435 } */ *ap = v; 1436 PUFFS_MSG_VARS(vn, poll); 1437 struct vnode *vp = ap->a_vp; 1438 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1439 struct puffs_node *pn = vp->v_data; 1440 int events, error; 1441 1442 if (EXISTSOP(pmp, POLL)) { 1443 mutex_enter(&pn->pn_mtx); 1444 events = pn->pn_revents & ap->a_events; 1445 if (events & ap->a_events) { 1446 pn->pn_revents &= ~ap->a_events; 1447 mutex_exit(&pn->pn_mtx); 1448 1449 return events; 1450 } else { 1451 puffs_referencenode(pn); 1452 mutex_exit(&pn->pn_mtx); 1453 1454 PUFFS_MSG_ALLOC(vn, poll); 1455 poll_msg->pvnr_events = ap->a_events; 1456 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1457 PUFFS_VN_POLL, VPTOPNC(vp)); 1458 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1459 selrecord(curlwp, &pn->pn_sel); 1460 1461 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1462 NULL, error); 1463 PUFFS_MSG_RELEASE(poll); 1464 1465 return 0; 1466 } 1467 } else { 1468 return genfs_poll(v); 1469 } 1470 } 1471 1472 static int 1473 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1474 { 1475 struct puffs_node *pn = VPTOPP(vp); 1476 struct vattr va; 1477 int pflags, error; 1478 1479 /* flush out information from our metacache, see vop_setattr */ 1480 if (pn->pn_stat & PNODE_METACACHE_MASK 1481 && (pn->pn_stat & PNODE_DYING) == 0) { 1482 vattr_null(&va); 1483 error = dosetattr(vp, &va, FSCRED, 1484 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1485 if (error) 1486 return error; 1487 } 1488 1489 /* 1490 * flush pages to avoid being overly dirty 1491 */ 1492 pflags = PGO_CLEANIT; 1493 if (wait) 1494 pflags |= PGO_SYNCIO; 1495 1496 mutex_enter(vp->v_interlock); 1497 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1498 } 1499 1500 int 1501 puffs_vnop_fsync(void *v) 1502 { 1503 struct vop_fsync_args /* { 1504 const struct vnodeop_desc *a_desc; 1505 struct vnode *a_vp; 1506 kauth_cred_t a_cred; 1507 int a_flags; 1508 off_t a_offlo; 1509 off_t a_offhi; 1510 } */ *ap = v; 1511 PUFFS_MSG_VARS(vn, fsync); 1512 struct vnode *vp; 1513 struct puffs_node *pn; 1514 struct puffs_mount *pmp; 1515 int error, dofaf; 1516 1517 vp = ap->a_vp; 1518 KASSERT(vp != NULL); 1519 pn = VPTOPP(vp); 1520 KASSERT(pn != NULL); 1521 pmp = MPTOPUFFSMP(vp->v_mount); 1522 if (ap->a_flags & FSYNC_WAIT) { 1523 mutex_enter(&pn->pn_sizemtx); 1524 } else { 1525 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1526 return EDEADLK; 1527 } 1528 1529 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1530 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1531 if (error) 1532 goto out; 1533 1534 /* 1535 * HELLO! We exit already here if the user server does not 1536 * support fsync OR if we should call fsync for a node which 1537 * has references neither in the kernel or the fs server. 1538 * Otherwise we continue to issue fsync() forward. 1539 */ 1540 error = 0; 1541 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1542 goto out; 1543 1544 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1545 /* 1546 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1547 * only FAFs for those. Otherwise there's a danger of deadlock, 1548 * since the execution context here might be the user server 1549 * doing some operation on another fs, which in turn caused a 1550 * vnode to be reclaimed from the freelist for this fs. 1551 */ 1552 if (dofaf == 0) { 1553 mutex_enter(vp->v_interlock); 1554 if (vp->v_iflag & VI_XLOCK) 1555 dofaf = 1; 1556 mutex_exit(vp->v_interlock); 1557 } 1558 1559 PUFFS_MSG_ALLOC(vn, fsync); 1560 if (dofaf) 1561 puffs_msg_setfaf(park_fsync); 1562 1563 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1564 fsync_msg->pvnr_flags = ap->a_flags; 1565 fsync_msg->pvnr_offlo = ap->a_offlo; 1566 fsync_msg->pvnr_offhi = ap->a_offhi; 1567 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1568 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1569 1570 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1571 PUFFS_MSG_RELEASE(fsync); 1572 1573 error = checkerr(pmp, error, __func__); 1574 1575 out: 1576 mutex_exit(&pn->pn_sizemtx); 1577 return error; 1578 } 1579 1580 int 1581 puffs_vnop_seek(void *v) 1582 { 1583 struct vop_seek_args /* { 1584 const struct vnodeop_desc *a_desc; 1585 struct vnode *a_vp; 1586 off_t a_oldoff; 1587 off_t a_newoff; 1588 kauth_cred_t a_cred; 1589 } */ *ap = v; 1590 PUFFS_MSG_VARS(vn, seek); 1591 struct vnode *vp = ap->a_vp; 1592 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1593 int error; 1594 1595 PUFFS_MSG_ALLOC(vn, seek); 1596 seek_msg->pvnr_oldoff = ap->a_oldoff; 1597 seek_msg->pvnr_newoff = ap->a_newoff; 1598 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1599 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1600 PUFFS_VN_SEEK, VPTOPNC(vp)); 1601 1602 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1603 PUFFS_MSG_RELEASE(seek); 1604 return checkerr(pmp, error, __func__); 1605 } 1606 1607 static int 1608 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1609 struct componentname *cnp) 1610 { 1611 PUFFS_MSG_VARS(vn, remove); 1612 int error; 1613 1614 PUFFS_MSG_ALLOC(vn, remove); 1615 remove_msg->pvnr_cookie_targ = ck; 1616 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1617 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1618 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1619 1620 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1621 PUFFS_MSG_RELEASE(remove); 1622 1623 return checkerr(pmp, error, __func__); 1624 } 1625 1626 /* 1627 * XXX: can't use callremove now because can't catch setbacks with 1628 * it due to lack of a pnode argument. 1629 */ 1630 int 1631 puffs_vnop_remove(void *v) 1632 { 1633 struct vop_remove_args /* { 1634 const struct vnodeop_desc *a_desc; 1635 struct vnode *a_dvp; 1636 struct vnode *a_vp; 1637 struct componentname *a_cnp; 1638 } */ *ap = v; 1639 PUFFS_MSG_VARS(vn, remove); 1640 struct vnode *dvp = ap->a_dvp; 1641 struct vnode *vp = ap->a_vp; 1642 struct puffs_node *dpn = VPTOPP(dvp); 1643 struct puffs_node *pn = VPTOPP(vp); 1644 struct componentname *cnp = ap->a_cnp; 1645 struct mount *mp = dvp->v_mount; 1646 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1647 int error; 1648 1649 PUFFS_MSG_ALLOC(vn, remove); 1650 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1651 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1652 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1653 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1654 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1655 1656 puffs_msg_enqueue(pmp, park_remove); 1657 REFPN_AND_UNLOCKVP(dvp, dpn); 1658 if (dvp == vp) 1659 REFPN(pn); 1660 else 1661 REFPN_AND_UNLOCKVP(vp, pn); 1662 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1663 1664 PUFFS_MSG_RELEASE(remove); 1665 1666 RELEPN_AND_VP(dvp, dpn); 1667 RELEPN_AND_VP(vp, pn); 1668 1669 error = checkerr(pmp, error, __func__); 1670 return error; 1671 } 1672 1673 int 1674 puffs_vnop_mkdir(void *v) 1675 { 1676 struct vop_mkdir_args /* { 1677 const struct vnodeop_desc *a_desc; 1678 struct vnode *a_dvp; 1679 struct vnode **a_vpp; 1680 struct componentname *a_cnp; 1681 struct vattr *a_vap; 1682 } */ *ap = v; 1683 PUFFS_MSG_VARS(vn, mkdir); 1684 struct vnode *dvp = ap->a_dvp; 1685 struct puffs_node *dpn = VPTOPP(dvp); 1686 struct componentname *cnp = ap->a_cnp; 1687 struct mount *mp = dvp->v_mount; 1688 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1689 int error; 1690 1691 PUFFS_MSG_ALLOC(vn, mkdir); 1692 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1693 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1694 mkdir_msg->pvnr_va = *ap->a_vap; 1695 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1696 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1697 1698 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1699 1700 error = checkerr(pmp, error, __func__); 1701 if (error) 1702 goto out; 1703 1704 error = puffs_newnode(mp, dvp, ap->a_vpp, 1705 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1706 if (error) { 1707 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1708 mkdir_msg->pvnr_newnode, cnp); 1709 goto out; 1710 } 1711 1712 if (PUFFS_USE_FS_TTL(pmp)) { 1713 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1714 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1715 struct vattr *rvap = &mkdir_msg->pvnr_va; 1716 1717 update_va(*ap->a_vpp, NULL, rvap, 1718 va_ttl, cn_ttl, SETATTR_CHSIZE); 1719 } 1720 1721 out: 1722 vput(dvp); 1723 PUFFS_MSG_RELEASE(mkdir); 1724 return error; 1725 } 1726 1727 static int 1728 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1729 struct componentname *cnp) 1730 { 1731 PUFFS_MSG_VARS(vn, rmdir); 1732 int error; 1733 1734 PUFFS_MSG_ALLOC(vn, rmdir); 1735 rmdir_msg->pvnr_cookie_targ = ck; 1736 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1737 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1738 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1739 1740 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1741 PUFFS_MSG_RELEASE(rmdir); 1742 1743 return checkerr(pmp, error, __func__); 1744 } 1745 1746 int 1747 puffs_vnop_rmdir(void *v) 1748 { 1749 struct vop_rmdir_args /* { 1750 const struct vnodeop_desc *a_desc; 1751 struct vnode *a_dvp; 1752 struct vnode *a_vp; 1753 struct componentname *a_cnp; 1754 } */ *ap = v; 1755 PUFFS_MSG_VARS(vn, rmdir); 1756 struct vnode *dvp = ap->a_dvp; 1757 struct vnode *vp = ap->a_vp; 1758 struct puffs_node *dpn = VPTOPP(dvp); 1759 struct puffs_node *pn = VPTOPP(vp); 1760 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1761 struct componentname *cnp = ap->a_cnp; 1762 int error; 1763 1764 PUFFS_MSG_ALLOC(vn, rmdir); 1765 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1766 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1767 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1768 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1769 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1770 1771 puffs_msg_enqueue(pmp, park_rmdir); 1772 REFPN_AND_UNLOCKVP(dvp, dpn); 1773 REFPN_AND_UNLOCKVP(vp, pn); 1774 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1775 1776 PUFFS_MSG_RELEASE(rmdir); 1777 1778 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1779 RELEPN_AND_VP(dvp, dpn); 1780 RELEPN_AND_VP(vp, pn); 1781 1782 return error; 1783 } 1784 1785 int 1786 puffs_vnop_link(void *v) 1787 { 1788 struct vop_link_args /* { 1789 const struct vnodeop_desc *a_desc; 1790 struct vnode *a_dvp; 1791 struct vnode *a_vp; 1792 struct componentname *a_cnp; 1793 } */ *ap = v; 1794 PUFFS_MSG_VARS(vn, link); 1795 struct vnode *dvp = ap->a_dvp; 1796 struct vnode *vp = ap->a_vp; 1797 struct puffs_node *dpn = VPTOPP(dvp); 1798 struct puffs_node *pn = VPTOPP(vp); 1799 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1800 struct componentname *cnp = ap->a_cnp; 1801 int error; 1802 1803 PUFFS_MSG_ALLOC(vn, link); 1804 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1805 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1806 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1807 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1808 PUFFS_VN_LINK, VPTOPNC(dvp)); 1809 1810 puffs_msg_enqueue(pmp, park_link); 1811 REFPN_AND_UNLOCKVP(dvp, dpn); 1812 REFPN(pn); 1813 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1814 1815 PUFFS_MSG_RELEASE(link); 1816 1817 error = checkerr(pmp, error, __func__); 1818 1819 /* 1820 * XXX: stay in touch with the cache. I don't like this, but 1821 * don't have a better solution either. See also puffs_rename(). 1822 */ 1823 if (error == 0) 1824 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1825 1826 RELEPN_AND_VP(dvp, dpn); 1827 puffs_releasenode(pn); 1828 1829 return error; 1830 } 1831 1832 int 1833 puffs_vnop_symlink(void *v) 1834 { 1835 struct vop_symlink_args /* { 1836 const struct vnodeop_desc *a_desc; 1837 struct vnode *a_dvp; 1838 struct vnode **a_vpp; 1839 struct componentname *a_cnp; 1840 struct vattr *a_vap; 1841 char *a_target; 1842 } */ *ap = v; 1843 PUFFS_MSG_VARS(vn, symlink); 1844 struct vnode *dvp = ap->a_dvp; 1845 struct puffs_node *dpn = VPTOPP(dvp); 1846 struct mount *mp = dvp->v_mount; 1847 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1848 struct componentname *cnp = ap->a_cnp; 1849 int error; 1850 1851 *ap->a_vpp = NULL; 1852 1853 PUFFS_MSG_ALLOC(vn, symlink); 1854 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1855 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1856 symlink_msg->pvnr_va = *ap->a_vap; 1857 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1858 sizeof(symlink_msg->pvnr_link)); 1859 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1860 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1861 1862 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1863 1864 error = checkerr(pmp, error, __func__); 1865 if (error) 1866 goto out; 1867 1868 error = puffs_newnode(mp, dvp, ap->a_vpp, 1869 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1870 if (error) { 1871 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1872 symlink_msg->pvnr_newnode, cnp); 1873 goto out; 1874 } 1875 1876 if (PUFFS_USE_FS_TTL(pmp)) { 1877 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 1878 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 1879 struct vattr *rvap = &symlink_msg->pvnr_va; 1880 1881 update_va(*ap->a_vpp, NULL, rvap, 1882 va_ttl, cn_ttl, SETATTR_CHSIZE); 1883 } 1884 1885 out: 1886 vput(dvp); 1887 PUFFS_MSG_RELEASE(symlink); 1888 1889 return error; 1890 } 1891 1892 int 1893 puffs_vnop_readlink(void *v) 1894 { 1895 struct vop_readlink_args /* { 1896 const struct vnodeop_desc *a_desc; 1897 struct vnode *a_vp; 1898 struct uio *a_uio; 1899 kauth_cred_t a_cred; 1900 } */ *ap = v; 1901 PUFFS_MSG_VARS(vn, readlink); 1902 struct vnode *vp = ap->a_vp; 1903 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1904 size_t linklen; 1905 int error; 1906 1907 PUFFS_MSG_ALLOC(vn, readlink); 1908 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1909 linklen = sizeof(readlink_msg->pvnr_link); 1910 readlink_msg->pvnr_linklen = linklen; 1911 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1912 PUFFS_VN_READLINK, VPTOPNC(vp)); 1913 1914 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1915 error = checkerr(pmp, error, __func__); 1916 if (error) 1917 goto out; 1918 1919 /* bad bad user file server */ 1920 if (readlink_msg->pvnr_linklen > linklen) { 1921 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1922 "linklen too big", VPTOPNC(ap->a_vp)); 1923 error = EPROTO; 1924 goto out; 1925 } 1926 1927 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1928 ap->a_uio); 1929 out: 1930 PUFFS_MSG_RELEASE(readlink); 1931 return error; 1932 } 1933 1934 int 1935 puffs_vnop_rename(void *v) 1936 { 1937 struct vop_rename_args /* { 1938 const struct vnodeop_desc *a_desc; 1939 struct vnode *a_fdvp; 1940 struct vnode *a_fvp; 1941 struct componentname *a_fcnp; 1942 struct vnode *a_tdvp; 1943 struct vnode *a_tvp; 1944 struct componentname *a_tcnp; 1945 } */ *ap = v; 1946 PUFFS_MSG_VARS(vn, rename); 1947 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 1948 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 1949 struct puffs_node *fpn = ap->a_fvp->v_data; 1950 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1951 int error; 1952 bool doabort = true; 1953 1954 if ((fvp->v_mount != tdvp->v_mount) || 1955 (tvp && (fvp->v_mount != tvp->v_mount))) { 1956 ERROUT(EXDEV); 1957 } 1958 1959 PUFFS_MSG_ALLOC(vn, rename); 1960 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 1961 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 1962 if (tvp) 1963 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 1964 else 1965 rename_msg->pvnr_cookie_targ = NULL; 1966 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1967 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1968 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1969 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1970 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1971 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1972 1973 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1974 doabort = false; 1975 PUFFS_MSG_RELEASE(rename); 1976 error = checkerr(pmp, error, __func__); 1977 1978 /* 1979 * XXX: stay in touch with the cache. I don't like this, but 1980 * don't have a better solution either. See also puffs_link(). 1981 */ 1982 if (error == 0) 1983 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1984 1985 out: 1986 if (doabort) 1987 VOP_ABORTOP(tdvp, ap->a_tcnp); 1988 if (tvp != NULL) 1989 vput(tvp); 1990 if (tdvp == tvp) 1991 vrele(tdvp); 1992 else 1993 vput(tdvp); 1994 1995 if (doabort) 1996 VOP_ABORTOP(fdvp, ap->a_fcnp); 1997 vrele(fdvp); 1998 vrele(fvp); 1999 2000 return error; 2001 } 2002 2003 #define RWARGS(cont, iofl, move, offset, creds) \ 2004 (cont)->pvnr_ioflag = (iofl); \ 2005 (cont)->pvnr_resid = (move); \ 2006 (cont)->pvnr_offset = (offset); \ 2007 puffs_credcvt(&(cont)->pvnr_cred, creds) 2008 2009 int 2010 puffs_vnop_read(void *v) 2011 { 2012 struct vop_read_args /* { 2013 const struct vnodeop_desc *a_desc; 2014 struct vnode *a_vp; 2015 struct uio *a_uio; 2016 int a_ioflag; 2017 kauth_cred_t a_cred; 2018 } */ *ap = v; 2019 PUFFS_MSG_VARS(vn, read); 2020 struct vnode *vp = ap->a_vp; 2021 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2022 struct uio *uio = ap->a_uio; 2023 size_t tomove, argsize; 2024 vsize_t bytelen; 2025 int error; 2026 2027 read_msg = NULL; 2028 error = 0; 2029 2030 /* std sanity */ 2031 if (uio->uio_resid == 0) 2032 return 0; 2033 if (uio->uio_offset < 0) 2034 return EINVAL; 2035 2036 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2037 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2038 2039 while (uio->uio_resid > 0) { 2040 if (vp->v_size <= uio->uio_offset) { 2041 break; 2042 } 2043 bytelen = MIN(uio->uio_resid, 2044 vp->v_size - uio->uio_offset); 2045 if (bytelen == 0) 2046 break; 2047 2048 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2049 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2050 if (error) 2051 break; 2052 } 2053 2054 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2055 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2056 } else { 2057 /* 2058 * in case it's not a regular file or we're operating 2059 * uncached, do read in the old-fashioned style, 2060 * i.e. explicit read operations 2061 */ 2062 2063 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2064 argsize = sizeof(struct puffs_vnmsg_read); 2065 puffs_msgmem_alloc(argsize + tomove, &park_read, 2066 (void *)&read_msg, 1); 2067 2068 error = 0; 2069 while (uio->uio_resid > 0) { 2070 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2071 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2072 RWARGS(read_msg, ap->a_ioflag, tomove, 2073 uio->uio_offset, ap->a_cred); 2074 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2075 PUFFS_VN_READ, VPTOPNC(vp)); 2076 puffs_msg_setdelta(park_read, tomove); 2077 2078 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2079 NULL, error); 2080 error = checkerr(pmp, error, __func__); 2081 if (error) 2082 break; 2083 2084 if (read_msg->pvnr_resid > tomove) { 2085 puffs_senderr(pmp, PUFFS_ERR_READ, 2086 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2087 error = EPROTO; 2088 break; 2089 } 2090 2091 error = uiomove(read_msg->pvnr_data, 2092 tomove - read_msg->pvnr_resid, uio); 2093 2094 /* 2095 * in case the file is out of juice, resid from 2096 * userspace is != 0. and the error-case is 2097 * quite obvious 2098 */ 2099 if (error || read_msg->pvnr_resid) 2100 break; 2101 } 2102 2103 puffs_msgmem_release(park_read); 2104 } 2105 2106 return error; 2107 } 2108 2109 /* 2110 * XXX: in case of a failure, this leaves uio in a bad state. 2111 * We could theoretically copy the uio and iovecs and "replay" 2112 * them the right amount after the userspace trip, but don't 2113 * bother for now. 2114 */ 2115 int 2116 puffs_vnop_write(void *v) 2117 { 2118 struct vop_write_args /* { 2119 const struct vnodeop_desc *a_desc; 2120 struct vnode *a_vp; 2121 struct uio *a_uio; 2122 int a_ioflag; 2123 kauth_cred_t a_cred; 2124 } */ *ap = v; 2125 PUFFS_MSG_VARS(vn, write); 2126 struct vnode *vp = ap->a_vp; 2127 struct puffs_node *pn = VPTOPP(vp); 2128 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2129 struct uio *uio = ap->a_uio; 2130 size_t tomove, argsize; 2131 off_t oldoff, newoff, origoff; 2132 vsize_t bytelen; 2133 int error, uflags; 2134 int ubcflags; 2135 2136 error = uflags = 0; 2137 write_msg = NULL; 2138 2139 mutex_enter(&pn->pn_sizemtx); 2140 2141 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2142 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2143 2144 /* 2145 * userspace *should* be allowed to control this, 2146 * but with UBC it's a bit unclear how to handle it 2147 */ 2148 if (ap->a_ioflag & IO_APPEND) 2149 uio->uio_offset = vp->v_size; 2150 2151 origoff = uio->uio_offset; 2152 while (uio->uio_resid > 0) { 2153 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2154 uflags |= PUFFS_UPDATEATIME; 2155 uflags |= PUFFS_UPDATECTIME; 2156 uflags |= PUFFS_UPDATEMTIME; 2157 oldoff = uio->uio_offset; 2158 bytelen = uio->uio_resid; 2159 2160 newoff = oldoff + bytelen; 2161 if (vp->v_size < newoff) { 2162 uvm_vnp_setwritesize(vp, newoff); 2163 } 2164 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2165 UVM_ADV_RANDOM, ubcflags); 2166 2167 /* 2168 * In case of a ubc_uiomove() error, 2169 * opt to not extend the file at all and 2170 * return an error. Otherwise, if we attempt 2171 * to clear the memory we couldn't fault to, 2172 * we might generate a kernel page fault. 2173 */ 2174 if (vp->v_size < newoff) { 2175 if (error == 0) { 2176 uflags |= PUFFS_UPDATESIZE; 2177 uvm_vnp_setsize(vp, newoff); 2178 } else { 2179 uvm_vnp_setwritesize(vp, vp->v_size); 2180 } 2181 } 2182 if (error) 2183 break; 2184 2185 /* 2186 * If we're writing large files, flush to file server 2187 * every 64k. Otherwise we can very easily exhaust 2188 * kernel and user memory, as the file server cannot 2189 * really keep up with our writing speed. 2190 * 2191 * Note: this does *NOT* honor MNT_ASYNC, because 2192 * that gives userland too much say in the kernel. 2193 */ 2194 if (oldoff >> 16 != uio->uio_offset >> 16) { 2195 mutex_enter(vp->v_interlock); 2196 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2197 uio->uio_offset & ~0xffff, 2198 PGO_CLEANIT | PGO_SYNCIO); 2199 if (error) 2200 break; 2201 } 2202 } 2203 2204 /* synchronous I/O? */ 2205 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2206 mutex_enter(vp->v_interlock); 2207 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2208 round_page(uio->uio_offset), 2209 PGO_CLEANIT | PGO_SYNCIO); 2210 2211 /* write through page cache? */ 2212 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2213 mutex_enter(vp->v_interlock); 2214 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2215 round_page(uio->uio_offset), PGO_CLEANIT); 2216 } 2217 2218 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2219 } else { 2220 /* tomove is non-increasing */ 2221 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2222 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2223 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2224 2225 while (uio->uio_resid > 0) { 2226 /* move data to buffer */ 2227 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2228 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2229 RWARGS(write_msg, ap->a_ioflag, tomove, 2230 uio->uio_offset, ap->a_cred); 2231 error = uiomove(write_msg->pvnr_data, tomove, uio); 2232 if (error) 2233 break; 2234 2235 /* move buffer to userspace */ 2236 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2237 PUFFS_VN_WRITE, VPTOPNC(vp)); 2238 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2239 NULL, error); 2240 error = checkerr(pmp, error, __func__); 2241 if (error) 2242 break; 2243 2244 if (write_msg->pvnr_resid > tomove) { 2245 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2246 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2247 error = EPROTO; 2248 break; 2249 } 2250 2251 /* adjust file size */ 2252 if (vp->v_size < uio->uio_offset) 2253 uvm_vnp_setsize(vp, uio->uio_offset); 2254 2255 /* didn't move everything? bad userspace. bail */ 2256 if (write_msg->pvnr_resid != 0) { 2257 error = EIO; 2258 break; 2259 } 2260 } 2261 puffs_msgmem_release(park_write); 2262 } 2263 2264 mutex_exit(&pn->pn_sizemtx); 2265 return error; 2266 } 2267 2268 int 2269 puffs_vnop_print(void *v) 2270 { 2271 struct vop_print_args /* { 2272 struct vnode *a_vp; 2273 } */ *ap = v; 2274 PUFFS_MSG_VARS(vn, print); 2275 struct vnode *vp = ap->a_vp; 2276 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2277 struct puffs_node *pn = vp->v_data; 2278 int error; 2279 2280 /* kernel portion */ 2281 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2282 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2283 if (vp->v_type == VFIFO) 2284 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2285 printf("\n"); 2286 2287 /* userspace portion */ 2288 if (EXISTSOP(pmp, PRINT)) { 2289 PUFFS_MSG_ALLOC(vn, print); 2290 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2291 PUFFS_VN_PRINT, VPTOPNC(vp)); 2292 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2293 NULL, error); 2294 PUFFS_MSG_RELEASE(print); 2295 } 2296 2297 return 0; 2298 } 2299 2300 int 2301 puffs_vnop_pathconf(void *v) 2302 { 2303 struct vop_pathconf_args /* { 2304 const struct vnodeop_desc *a_desc; 2305 struct vnode *a_vp; 2306 int a_name; 2307 register_t *a_retval; 2308 } */ *ap = v; 2309 PUFFS_MSG_VARS(vn, pathconf); 2310 struct vnode *vp = ap->a_vp; 2311 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2312 int error; 2313 2314 PUFFS_MSG_ALLOC(vn, pathconf); 2315 pathconf_msg->pvnr_name = ap->a_name; 2316 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2317 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2318 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2319 error = checkerr(pmp, error, __func__); 2320 if (!error) 2321 *ap->a_retval = pathconf_msg->pvnr_retval; 2322 PUFFS_MSG_RELEASE(pathconf); 2323 2324 return error; 2325 } 2326 2327 int 2328 puffs_vnop_advlock(void *v) 2329 { 2330 struct vop_advlock_args /* { 2331 const struct vnodeop_desc *a_desc; 2332 struct vnode *a_vp; 2333 void *a_id; 2334 int a_op; 2335 struct flock *a_fl; 2336 int a_flags; 2337 } */ *ap = v; 2338 PUFFS_MSG_VARS(vn, advlock); 2339 struct vnode *vp = ap->a_vp; 2340 struct puffs_node *pn = VPTOPP(vp); 2341 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2342 int error; 2343 2344 if (!EXISTSOP(pmp, ADVLOCK)) 2345 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2346 2347 PUFFS_MSG_ALLOC(vn, advlock); 2348 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2349 sizeof(advlock_msg->pvnr_fl)); 2350 advlock_msg->pvnr_id = ap->a_id; 2351 advlock_msg->pvnr_op = ap->a_op; 2352 advlock_msg->pvnr_flags = ap->a_flags; 2353 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2354 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2355 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2356 error = checkerr(pmp, error, __func__); 2357 PUFFS_MSG_RELEASE(advlock); 2358 2359 return error; 2360 } 2361 2362 int 2363 puffs_vnop_abortop(void *v) 2364 { 2365 struct vop_abortop_args /* { 2366 struct vnode *a_dvp; 2367 struct componentname *a_cnp; 2368 }; */ *ap = v; 2369 PUFFS_MSG_VARS(vn, abortop); 2370 struct vnode *dvp = ap->a_dvp; 2371 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2372 struct componentname *cnp = ap->a_cnp; 2373 2374 if (EXISTSOP(pmp, ABORTOP)) { 2375 PUFFS_MSG_ALLOC(vn, abortop); 2376 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2377 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2378 puffs_msg_setfaf(park_abortop); 2379 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2380 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2381 2382 puffs_msg_enqueue(pmp, park_abortop); 2383 PUFFS_MSG_RELEASE(abortop); 2384 } 2385 2386 return genfs_abortop(v); 2387 } 2388 2389 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2390 2391 /* 2392 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2393 */ 2394 int 2395 puffs_vnop_strategy(void *v) 2396 { 2397 struct vop_strategy_args /* { 2398 const struct vnodeop_desc *a_desc; 2399 struct vnode *a_vp; 2400 struct buf *a_bp; 2401 } */ *ap = v; 2402 PUFFS_MSG_VARS(vn, rw); 2403 struct vnode *vp = ap->a_vp; 2404 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2405 struct puffs_node *pn; 2406 struct buf *bp; 2407 size_t argsize; 2408 size_t tomove, moved; 2409 int error, dofaf, cansleep, dobiodone; 2410 2411 pmp = MPTOPUFFSMP(vp->v_mount); 2412 bp = ap->a_bp; 2413 error = 0; 2414 dofaf = 0; 2415 cansleep = 0; 2416 pn = VPTOPP(vp); 2417 park_rw = NULL; /* explicit */ 2418 dobiodone = 1; 2419 2420 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2421 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2422 ERROUT(EOPNOTSUPP); 2423 2424 /* 2425 * Short-circuit optimization: don't flush buffer in between 2426 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2427 */ 2428 if (pn->pn_stat & PNODE_DYING) { 2429 KASSERT(BUF_ISWRITE(bp)); 2430 bp->b_resid = 0; 2431 goto out; 2432 } 2433 2434 #ifdef DIAGNOSTIC 2435 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2436 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2437 bp->b_bcount); 2438 #endif 2439 2440 /* 2441 * See explanation for the necessity of a FAF in puffs_fsync. 2442 * 2443 * Also, do FAF in case we're suspending. 2444 * See puffs_vfsops.c:pageflush() 2445 */ 2446 if (BUF_ISWRITE(bp)) { 2447 mutex_enter(vp->v_interlock); 2448 if (vp->v_iflag & VI_XLOCK) 2449 dofaf = 1; 2450 if (pn->pn_stat & PNODE_FAF) 2451 dofaf = 1; 2452 mutex_exit(vp->v_interlock); 2453 } 2454 2455 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2456 2457 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2458 2459 /* allocate transport structure */ 2460 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2461 argsize = sizeof(struct puffs_vnmsg_rw); 2462 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2463 (void *)&rw_msg, cansleep); 2464 if (error) 2465 goto out; 2466 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2467 2468 /* 2x2 cases: read/write, faf/nofaf */ 2469 if (BUF_ISREAD(bp)) { 2470 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2471 PUFFS_VN_READ, VPTOPNC(vp)); 2472 puffs_msg_setdelta(park_rw, tomove); 2473 if (BIOASYNC(bp)) { 2474 puffs_msg_setcall(park_rw, 2475 puffs_parkdone_asyncbioread, bp); 2476 puffs_msg_enqueue(pmp, park_rw); 2477 dobiodone = 0; 2478 } else { 2479 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2480 NULL, error); 2481 error = checkerr(pmp, error, __func__); 2482 if (error) 2483 goto out; 2484 2485 if (rw_msg->pvnr_resid > tomove) { 2486 puffs_senderr(pmp, PUFFS_ERR_READ, 2487 E2BIG, "resid grew", VPTOPNC(vp)); 2488 ERROUT(EPROTO); 2489 } 2490 2491 moved = tomove - rw_msg->pvnr_resid; 2492 2493 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2494 bp->b_resid = bp->b_bcount - moved; 2495 } 2496 } else { 2497 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2498 PUFFS_VN_WRITE, VPTOPNC(vp)); 2499 /* 2500 * make pages read-only before we write them if we want 2501 * write caching info 2502 */ 2503 if (PUFFS_WCACHEINFO(pmp)) { 2504 struct uvm_object *uobj = &vp->v_uobj; 2505 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2506 struct vm_page *vmp; 2507 int i; 2508 2509 for (i = 0; i < npages; i++) { 2510 vmp= uvm_pageratop((vaddr_t)bp->b_data 2511 + (i << PAGE_SHIFT)); 2512 DPRINTF(("puffs_strategy: write-protecting " 2513 "vp %p page %p, offset %" PRId64"\n", 2514 vp, vmp, vmp->offset)); 2515 mutex_enter(uobj->vmobjlock); 2516 vmp->flags |= PG_RDONLY; 2517 pmap_page_protect(vmp, VM_PROT_READ); 2518 mutex_exit(uobj->vmobjlock); 2519 } 2520 } 2521 2522 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2523 if (dofaf) { 2524 puffs_msg_setfaf(park_rw); 2525 } else if (BIOASYNC(bp)) { 2526 puffs_msg_setcall(park_rw, 2527 puffs_parkdone_asyncbiowrite, bp); 2528 dobiodone = 0; 2529 } 2530 2531 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2532 2533 if (dobiodone == 0) 2534 goto out; 2535 2536 /* 2537 * XXXXXXXX: wrong, but kernel can't survive strategy 2538 * failure currently. Here, have one more X: X. 2539 */ 2540 if (error != ENOMEM) 2541 error = 0; 2542 2543 error = checkerr(pmp, error, __func__); 2544 if (error) 2545 goto out; 2546 2547 if (rw_msg->pvnr_resid > tomove) { 2548 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2549 E2BIG, "resid grew", VPTOPNC(vp)); 2550 ERROUT(EPROTO); 2551 } 2552 2553 /* 2554 * FAF moved everything. Frankly, we don't 2555 * really have a choice. 2556 */ 2557 if (dofaf && error == 0) 2558 moved = tomove; 2559 else 2560 moved = tomove - rw_msg->pvnr_resid; 2561 2562 bp->b_resid = bp->b_bcount - moved; 2563 if (bp->b_resid != 0) { 2564 ERROUT(EIO); 2565 } 2566 } 2567 2568 out: 2569 if (park_rw) 2570 puffs_msgmem_release(park_rw); 2571 2572 if (error) 2573 bp->b_error = error; 2574 2575 if (error || dobiodone) 2576 biodone(bp); 2577 2578 return error; 2579 } 2580 2581 int 2582 puffs_vnop_mmap(void *v) 2583 { 2584 struct vop_mmap_args /* { 2585 const struct vnodeop_desc *a_desc; 2586 struct vnode *a_vp; 2587 vm_prot_t a_prot; 2588 kauth_cred_t a_cred; 2589 } */ *ap = v; 2590 PUFFS_MSG_VARS(vn, mmap); 2591 struct vnode *vp = ap->a_vp; 2592 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2593 int error; 2594 2595 if (!PUFFS_USE_PAGECACHE(pmp)) 2596 return genfs_eopnotsupp(v); 2597 2598 if (EXISTSOP(pmp, MMAP)) { 2599 PUFFS_MSG_ALLOC(vn, mmap); 2600 mmap_msg->pvnr_prot = ap->a_prot; 2601 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2602 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2603 PUFFS_VN_MMAP, VPTOPNC(vp)); 2604 2605 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2606 error = checkerr(pmp, error, __func__); 2607 PUFFS_MSG_RELEASE(mmap); 2608 } else { 2609 error = genfs_mmap(v); 2610 } 2611 2612 return error; 2613 } 2614 2615 2616 /* 2617 * The rest don't get a free trip to userspace and back, they 2618 * have to stay within the kernel. 2619 */ 2620 2621 /* 2622 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2623 * well, maybe somehow, somewhere, some day .... 2624 */ 2625 int 2626 puffs_vnop_bmap(void *v) 2627 { 2628 struct vop_bmap_args /* { 2629 const struct vnodeop_desc *a_desc; 2630 struct vnode *a_vp; 2631 daddr_t a_bn; 2632 struct vnode **a_vpp; 2633 daddr_t *a_bnp; 2634 int *a_runp; 2635 } */ *ap = v; 2636 struct puffs_mount *pmp; 2637 2638 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2639 2640 if (ap->a_vpp) 2641 *ap->a_vpp = ap->a_vp; 2642 if (ap->a_bnp) 2643 *ap->a_bnp = ap->a_bn; 2644 if (ap->a_runp) 2645 *ap->a_runp 2646 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2647 2648 return 0; 2649 } 2650 2651 /* 2652 * Handle getpages faults in puffs. We let genfs_getpages() do most 2653 * of the dirty work, but we come in this route to do accounting tasks. 2654 * If the user server has specified functions for cache notifications 2655 * about reads and/or writes, we record which type of operation we got, 2656 * for which page range, and proceed to issue a FAF notification to the 2657 * server about it. 2658 */ 2659 int 2660 puffs_vnop_getpages(void *v) 2661 { 2662 struct vop_getpages_args /* { 2663 const struct vnodeop_desc *a_desc; 2664 struct vnode *a_vp; 2665 voff_t a_offset; 2666 struct vm_page **a_m; 2667 int *a_count; 2668 int a_centeridx; 2669 vm_prot_t a_access_type; 2670 int a_advice; 2671 int a_flags; 2672 } */ *ap = v; 2673 struct puffs_mount *pmp; 2674 struct puffs_node *pn; 2675 struct vnode *vp; 2676 struct vm_page **pgs; 2677 struct puffs_cacheinfo *pcinfo = NULL; 2678 struct puffs_cacherun *pcrun; 2679 void *parkmem = NULL; 2680 size_t runsizes; 2681 int i, npages, si, streakon; 2682 int error, locked, write; 2683 2684 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2685 npages = *ap->a_count; 2686 pgs = ap->a_m; 2687 vp = ap->a_vp; 2688 pn = vp->v_data; 2689 locked = (ap->a_flags & PGO_LOCKED) != 0; 2690 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2691 2692 /* ccg xnaht - gets Wuninitialized wrong */ 2693 pcrun = NULL; 2694 runsizes = 0; 2695 2696 /* 2697 * Check that we aren't trying to fault in pages which our file 2698 * server doesn't know about. This happens if we extend a file by 2699 * skipping some pages and later try to fault in pages which 2700 * are between pn_serversize and vp_size. This check optimizes 2701 * away the common case where a file is being extended. 2702 */ 2703 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2704 struct vattr va; 2705 2706 /* try again later when we can block */ 2707 if (locked) 2708 ERROUT(EBUSY); 2709 2710 mutex_exit(vp->v_interlock); 2711 vattr_null(&va); 2712 va.va_size = vp->v_size; 2713 error = dosetattr(vp, &va, FSCRED, 0); 2714 if (error) 2715 ERROUT(error); 2716 mutex_enter(vp->v_interlock); 2717 } 2718 2719 if (write && PUFFS_WCACHEINFO(pmp)) { 2720 #ifdef notnowjohn 2721 /* allocate worst-case memory */ 2722 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2723 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2724 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2725 locked ? KM_NOSLEEP : KM_SLEEP); 2726 2727 /* 2728 * can't block if we're locked and can't mess up caching 2729 * information for fs server. so come back later, please 2730 */ 2731 if (pcinfo == NULL) 2732 ERROUT(ENOMEM); 2733 2734 parkmem = puffs_park_alloc(locked == 0); 2735 if (parkmem == NULL) 2736 ERROUT(ENOMEM); 2737 2738 pcrun = pcinfo->pcache_runs; 2739 #else 2740 (void)parkmem; 2741 #endif 2742 } 2743 2744 error = genfs_getpages(v); 2745 if (error) 2746 goto out; 2747 2748 if (PUFFS_WCACHEINFO(pmp) == 0) 2749 goto out; 2750 2751 /* 2752 * Let's see whose fault it was and inform the user server of 2753 * possibly read/written pages. Map pages from read faults 2754 * strictly read-only, since otherwise we might miss info on 2755 * when the page is actually write-faulted to. 2756 */ 2757 if (!locked) 2758 mutex_enter(vp->v_uobj.vmobjlock); 2759 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2760 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2761 if (streakon && write) { 2762 streakon = 0; 2763 pcrun[si].pcache_runend 2764 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2765 si++; 2766 } 2767 continue; 2768 } 2769 if (streakon == 0 && write) { 2770 streakon = 1; 2771 pcrun[si].pcache_runstart = pgs[i]->offset; 2772 } 2773 2774 if (!write) 2775 pgs[i]->flags |= PG_RDONLY; 2776 } 2777 /* was the last page part of our streak? */ 2778 if (streakon) { 2779 pcrun[si].pcache_runend 2780 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2781 si++; 2782 } 2783 if (!locked) 2784 mutex_exit(vp->v_uobj.vmobjlock); 2785 2786 KASSERT(si <= (npages / 2) + 1); 2787 2788 #ifdef notnowjohn 2789 /* send results to userspace */ 2790 if (write) 2791 puffs_cacheop(pmp, parkmem, pcinfo, 2792 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2793 #endif 2794 2795 out: 2796 if (error) { 2797 if (pcinfo != NULL) 2798 kmem_free(pcinfo, 2799 sizeof(struct puffs_cacheinfo) + runsizes); 2800 #ifdef notnowjohn 2801 if (parkmem != NULL) 2802 puffs_park_release(parkmem, 1); 2803 #endif 2804 } 2805 2806 return error; 2807 } 2808 2809 /* 2810 * Extended attribute support. 2811 */ 2812 2813 int 2814 puffs_vnop_getextattr(void *v) 2815 { 2816 struct vop_getextattr_args /* 2817 struct vnode *a_vp; 2818 int a_attrnamespace; 2819 const char *a_name; 2820 struct uio *a_uio; 2821 size_t *a_size; 2822 kauth_cred_t a_cred; 2823 }; */ *ap = v; 2824 PUFFS_MSG_VARS(vn, getextattr); 2825 struct vnode *vp = ap->a_vp; 2826 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2827 int attrnamespace = ap->a_attrnamespace; 2828 const char *name = ap->a_name; 2829 struct uio *uio = ap->a_uio; 2830 size_t *sizep = ap->a_size; 2831 size_t tomove, resid; 2832 int error; 2833 2834 if (uio) 2835 resid = uio->uio_resid; 2836 else 2837 resid = 0; 2838 2839 tomove = PUFFS_TOMOVE(resid, pmp); 2840 if (tomove != resid) { 2841 error = E2BIG; 2842 goto out; 2843 } 2844 2845 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2846 &park_getextattr, (void *)&getextattr_msg, 1); 2847 2848 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2849 strlcpy(getextattr_msg->pvnr_attrname, name, 2850 sizeof(getextattr_msg->pvnr_attrname)); 2851 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2852 if (sizep) 2853 getextattr_msg->pvnr_datasize = 1; 2854 getextattr_msg->pvnr_resid = tomove; 2855 2856 puffs_msg_setinfo(park_getextattr, 2857 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2858 puffs_msg_setdelta(park_getextattr, tomove); 2859 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2860 2861 error = checkerr(pmp, error, __func__); 2862 if (error) 2863 goto out; 2864 2865 resid = getextattr_msg->pvnr_resid; 2866 if (resid > tomove) { 2867 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2868 "resid grew", VPTOPNC(vp)); 2869 error = EPROTO; 2870 goto out; 2871 } 2872 2873 if (sizep) 2874 *sizep = getextattr_msg->pvnr_datasize; 2875 if (uio) 2876 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2877 2878 out: 2879 PUFFS_MSG_RELEASE(getextattr); 2880 return error; 2881 } 2882 2883 int 2884 puffs_vnop_setextattr(void *v) 2885 { 2886 struct vop_setextattr_args /* { 2887 struct vnode *a_vp; 2888 int a_attrnamespace; 2889 const char *a_name; 2890 struct uio *a_uio; 2891 kauth_cred_t a_cred; 2892 }; */ *ap = v; 2893 PUFFS_MSG_VARS(vn, setextattr); 2894 struct vnode *vp = ap->a_vp; 2895 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2896 int attrnamespace = ap->a_attrnamespace; 2897 const char *name = ap->a_name; 2898 struct uio *uio = ap->a_uio; 2899 size_t tomove, resid; 2900 int error; 2901 2902 if (uio) 2903 resid = uio->uio_resid; 2904 else 2905 resid = 0; 2906 2907 tomove = PUFFS_TOMOVE(resid, pmp); 2908 if (tomove != resid) { 2909 error = E2BIG; 2910 goto out; 2911 } 2912 2913 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2914 &park_setextattr, (void *)&setextattr_msg, 1); 2915 2916 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2917 strlcpy(setextattr_msg->pvnr_attrname, name, 2918 sizeof(setextattr_msg->pvnr_attrname)); 2919 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2920 setextattr_msg->pvnr_resid = tomove; 2921 2922 if (uio) { 2923 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2924 if (error) 2925 goto out; 2926 } 2927 2928 puffs_msg_setinfo(park_setextattr, 2929 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 2930 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 2931 2932 error = checkerr(pmp, error, __func__); 2933 if (error) 2934 goto out; 2935 2936 if (setextattr_msg->pvnr_resid != 0) 2937 error = EIO; 2938 2939 out: 2940 PUFFS_MSG_RELEASE(setextattr); 2941 2942 return error; 2943 } 2944 2945 int 2946 puffs_vnop_listextattr(void *v) 2947 { 2948 struct vop_listextattr_args /* { 2949 struct vnode *a_vp; 2950 int a_attrnamespace; 2951 struct uio *a_uio; 2952 size_t *a_size; 2953 int a_flag, 2954 kauth_cred_t a_cred; 2955 }; */ *ap = v; 2956 PUFFS_MSG_VARS(vn, listextattr); 2957 struct vnode *vp = ap->a_vp; 2958 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2959 int attrnamespace = ap->a_attrnamespace; 2960 struct uio *uio = ap->a_uio; 2961 size_t *sizep = ap->a_size; 2962 int flag = ap->a_flag; 2963 size_t tomove, resid; 2964 int error; 2965 2966 if (uio) 2967 resid = uio->uio_resid; 2968 else 2969 resid = 0; 2970 2971 tomove = PUFFS_TOMOVE(resid, pmp); 2972 if (tomove != resid) { 2973 error = E2BIG; 2974 goto out; 2975 } 2976 2977 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 2978 &park_listextattr, (void *)&listextattr_msg, 1); 2979 2980 listextattr_msg->pvnr_attrnamespace = attrnamespace; 2981 listextattr_msg->pvnr_flag = flag; 2982 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 2983 listextattr_msg->pvnr_resid = tomove; 2984 if (sizep) 2985 listextattr_msg->pvnr_datasize = 1; 2986 2987 puffs_msg_setinfo(park_listextattr, 2988 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 2989 puffs_msg_setdelta(park_listextattr, tomove); 2990 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 2991 2992 error = checkerr(pmp, error, __func__); 2993 if (error) 2994 goto out; 2995 2996 resid = listextattr_msg->pvnr_resid; 2997 if (resid > tomove) { 2998 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 2999 "resid grew", VPTOPNC(vp)); 3000 error = EPROTO; 3001 goto out; 3002 } 3003 3004 if (sizep) 3005 *sizep = listextattr_msg->pvnr_datasize; 3006 if (uio) 3007 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3008 3009 out: 3010 PUFFS_MSG_RELEASE(listextattr); 3011 return error; 3012 } 3013 3014 int 3015 puffs_vnop_deleteextattr(void *v) 3016 { 3017 struct vop_deleteextattr_args /* { 3018 struct vnode *a_vp; 3019 int a_attrnamespace; 3020 const char *a_name; 3021 kauth_cred_t a_cred; 3022 }; */ *ap = v; 3023 PUFFS_MSG_VARS(vn, deleteextattr); 3024 struct vnode *vp = ap->a_vp; 3025 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3026 int attrnamespace = ap->a_attrnamespace; 3027 const char *name = ap->a_name; 3028 int error; 3029 3030 PUFFS_MSG_ALLOC(vn, deleteextattr); 3031 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3032 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3033 sizeof(deleteextattr_msg->pvnr_attrname)); 3034 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3035 3036 puffs_msg_setinfo(park_deleteextattr, 3037 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3038 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3039 vp->v_data, NULL, error); 3040 3041 error = checkerr(pmp, error, __func__); 3042 3043 PUFFS_MSG_RELEASE(deleteextattr); 3044 return error; 3045 } 3046 3047 /* 3048 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3049 * FAF update information for the puffs node first. 3050 */ 3051 int 3052 puffs_vnop_spec_read(void *v) 3053 { 3054 struct vop_read_args /* { 3055 const struct vnodeop_desc *a_desc; 3056 struct vnode *a_vp; 3057 struct uio *a_uio; 3058 int a_ioflag; 3059 kauth_cred_t a_cred; 3060 } */ *ap = v; 3061 3062 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3063 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3064 } 3065 3066 int 3067 puffs_vnop_spec_write(void *v) 3068 { 3069 struct vop_write_args /* { 3070 const struct vnodeop_desc *a_desc; 3071 struct vnode *a_vp; 3072 struct uio *a_uio; 3073 int a_ioflag; 3074 kauth_cred_t a_cred; 3075 } */ *ap = v; 3076 3077 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3078 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3079 } 3080 3081 int 3082 puffs_vnop_fifo_read(void *v) 3083 { 3084 struct vop_read_args /* { 3085 const struct vnodeop_desc *a_desc; 3086 struct vnode *a_vp; 3087 struct uio *a_uio; 3088 int a_ioflag; 3089 kauth_cred_t a_cred; 3090 } */ *ap = v; 3091 3092 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3093 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3094 } 3095 3096 int 3097 puffs_vnop_fifo_write(void *v) 3098 { 3099 struct vop_write_args /* { 3100 const struct vnodeop_desc *a_desc; 3101 struct vnode *a_vp; 3102 struct uio *a_uio; 3103 int a_ioflag; 3104 kauth_cred_t a_cred; 3105 } */ *ap = v; 3106 3107 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3108 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3109 } 3110
Indexes created Wed Oct 01 07:09:59 GMT 2025