puffs_vnops.c revision 1.169
1 /* $NetBSD: puffs_vnops.c,v 1.169 2012/07/23 12:15:30 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 1.169 2012/07/23 12:15:30 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, int); 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, 0); 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 (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 511 error = cache_lookup(dvp, ap->a_vpp, cnp); 512 513 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 514 cvp = *ap->a_vpp; 515 cpn = VPTOPP(cvp); 516 517 if (TIMED_OUT(cpn->pn_cn_timeout)) { 518 cache_purge(cvp); 519 /* 520 * cached vnode (cvp) is still locked 521 * so that we can reuse it upon a new 522 * successful lookup. 523 */ 524 *ap->a_vpp = NULL; 525 error = -1; 526 } 527 } 528 529 /* 530 * Do not use negative caching, since the filesystem 531 * provides no TTL for it. 532 */ 533 if ((error == ENOENT) && PUFFS_USE_FS_TTL(pmp)) 534 error = -1; 535 536 if (error >= 0) 537 return error; 538 } 539 540 if (isdot) { 541 /* deal with rename lookup semantics */ 542 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 543 return EISDIR; 544 545 vp = ap->a_dvp; 546 vref(vp); 547 *ap->a_vpp = vp; 548 return 0; 549 } 550 551 if (cvp != NULL) 552 mutex_enter(&cpn->pn_sizemtx); 553 554 PUFFS_MSG_ALLOC(vn, lookup); 555 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 556 cnp, PUFFS_USE_FULLPNBUF(pmp)); 557 558 if (cnp->cn_flags & ISDOTDOT) 559 VOP_UNLOCK(dvp); 560 561 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 562 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 563 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 564 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 565 566 /* 567 * In case of error, there is no new vnode to play with, so be 568 * happy with the NULL value given to vpp in the beginning. 569 * Also, check if this really was an error or the target was not 570 * present. Either treat it as a non-error for CREATE/RENAME or 571 * enter the component into the negative name cache (if desired). 572 */ 573 if (error) { 574 error = checkerr(pmp, error, __func__); 575 if (error == ENOENT) { 576 /* don't allow to create files on r/o fs */ 577 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 578 && cnp->cn_nameiop == CREATE) { 579 error = EROFS; 580 581 /* adjust values if we are creating */ 582 } else if ((cnp->cn_flags & ISLASTCN) 583 && (cnp->cn_nameiop == CREATE 584 || cnp->cn_nameiop == RENAME)) { 585 error = EJUSTRETURN; 586 587 /* save negative cache entry */ 588 } else { 589 if (PUFFS_USE_NAMECACHE(pmp) && 590 !PUFFS_USE_FS_TTL(pmp) && 591 (cnp->cn_namelen <= NCHNAMLEN)) 592 cache_enter(dvp, NULL, cnp); 593 } 594 } 595 goto out; 596 } 597 598 /* 599 * Check that we don't get our parent node back, that would cause 600 * a pretty obvious deadlock. 601 */ 602 dpn = dvp->v_data; 603 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 604 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 605 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 606 error = EPROTO; 607 goto out; 608 } 609 610 /* 611 * Check if we looked up the cached vnode 612 */ 613 vp = NULL; 614 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 615 int grace; 616 617 /* 618 * Bump grace time of this node so that it does not get 619 * reclaimed too fast. We try to increase a bit more the 620 * lifetime of busiest * nodes - with some limits. 621 */ 622 grace = 10 * puffs_sopreq_expire_timeout; 623 cpn->pn_cn_grace = hardclock_ticks + grace; 624 vp = cvp; 625 } 626 627 /* 628 * No cached vnode available, or the cached vnode does not 629 * match the userland cookie anymore: is the node known? 630 */ 631 if (vp == NULL) { 632 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 633 1, 1, &vp); 634 } 635 636 if (error == PUFFS_NOSUCHCOOKIE) { 637 error = puffs_getvnode(dvp->v_mount, 638 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 639 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 640 if (error) { 641 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 642 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 643 ap->a_cnp); 644 goto out; 645 } 646 647 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 648 } else if (error) { 649 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 650 lookup_msg->pvnr_newnode, ap->a_cnp); 651 goto out; 652 } 653 654 /* 655 * Update cache and TTL 656 */ 657 if (PUFFS_USE_FS_TTL(pmp)) { 658 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 659 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 660 update_va(vp, NULL, &lookup_msg->pvnr_va, 661 va_ttl, cn_ttl, SETATTR_CHSIZE); 662 } 663 664 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 665 *ap->a_vpp = vp; 666 667 if (PUFFS_USE_NAMECACHE(pmp) && (cnp->cn_namelen <= NCHNAMLEN)) 668 cache_enter(dvp, vp, cnp); 669 670 /* XXX */ 671 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 672 cnp->cn_flags &= ~REQUIREDIR; 673 if (lookup_msg->pvnr_cn.pkcn_consume) 674 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 675 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 676 677 VPTOPP(vp)->pn_nlookup++; 678 out: 679 if (cvp != NULL) { 680 mutex_exit(&cpn->pn_sizemtx); 681 682 if (error || (cvp != vp)) 683 vput(cvp); 684 } 685 686 if (cnp->cn_flags & ISDOTDOT) 687 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 688 689 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 690 PUFFS_MSG_RELEASE(lookup); 691 return error; 692 } 693 694 #define REFPN_AND_UNLOCKVP(a, b) \ 695 do { \ 696 mutex_enter(&b->pn_mtx); \ 697 puffs_referencenode(b); \ 698 mutex_exit(&b->pn_mtx); \ 699 VOP_UNLOCK(a); \ 700 } while (/*CONSTCOND*/0) 701 702 #define REFPN(b) \ 703 do { \ 704 mutex_enter(&b->pn_mtx); \ 705 puffs_referencenode(b); \ 706 mutex_exit(&b->pn_mtx); \ 707 } while (/*CONSTCOND*/0) 708 709 #define RELEPN_AND_VP(a, b) \ 710 do { \ 711 puffs_releasenode(b); \ 712 vrele(a); \ 713 } while (/*CONSTCOND*/0) 714 715 int 716 puffs_vnop_create(void *v) 717 { 718 struct vop_create_args /* { 719 const struct vnodeop_desc *a_desc; 720 struct vnode *a_dvp; 721 struct vnode **a_vpp; 722 struct componentname *a_cnp; 723 struct vattr *a_vap; 724 } */ *ap = v; 725 PUFFS_MSG_VARS(vn, create); 726 struct vnode *dvp = ap->a_dvp; 727 struct puffs_node *dpn = VPTOPP(dvp); 728 struct componentname *cnp = ap->a_cnp; 729 struct mount *mp = dvp->v_mount; 730 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 731 int error; 732 733 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 734 dvp, ap->a_cnp->cn_nameptr)); 735 736 PUFFS_MSG_ALLOC(vn, create); 737 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 738 cnp, PUFFS_USE_FULLPNBUF(pmp)); 739 create_msg->pvnr_va = *ap->a_vap; 740 puffs_msg_setinfo(park_create, PUFFSOP_VN, 741 PUFFS_VN_CREATE, VPTOPNC(dvp)); 742 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 743 744 error = checkerr(pmp, error, __func__); 745 if (error) 746 goto out; 747 748 error = puffs_newnode(mp, dvp, ap->a_vpp, 749 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 750 if (error) { 751 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 752 create_msg->pvnr_newnode, cnp); 753 goto out; 754 } 755 756 if (PUFFS_USE_FS_TTL(pmp)) { 757 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 758 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 759 struct vattr *rvap = &create_msg->pvnr_va; 760 761 update_va(*ap->a_vpp, NULL, rvap, 762 va_ttl, cn_ttl, SETATTR_CHSIZE); 763 } 764 765 out: 766 vput(dvp); 767 768 DPRINTF(("puffs_create: return %d\n", error)); 769 PUFFS_MSG_RELEASE(create); 770 return error; 771 } 772 773 int 774 puffs_vnop_mknod(void *v) 775 { 776 struct vop_mknod_args /* { 777 const struct vnodeop_desc *a_desc; 778 struct vnode *a_dvp; 779 struct vnode **a_vpp; 780 struct componentname *a_cnp; 781 struct vattr *a_vap; 782 } */ *ap = v; 783 PUFFS_MSG_VARS(vn, mknod); 784 struct vnode *dvp = ap->a_dvp; 785 struct puffs_node *dpn = VPTOPP(dvp); 786 struct componentname *cnp = ap->a_cnp; 787 struct mount *mp = dvp->v_mount; 788 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 789 int error; 790 791 PUFFS_MSG_ALLOC(vn, mknod); 792 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 793 cnp, PUFFS_USE_FULLPNBUF(pmp)); 794 mknod_msg->pvnr_va = *ap->a_vap; 795 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 796 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 797 798 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 799 800 error = checkerr(pmp, error, __func__); 801 if (error) 802 goto out; 803 804 error = puffs_newnode(mp, dvp, ap->a_vpp, 805 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 806 ap->a_vap->va_rdev); 807 if (error) { 808 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 809 mknod_msg->pvnr_newnode, cnp); 810 goto out; 811 } 812 813 if (PUFFS_USE_FS_TTL(pmp)) { 814 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 815 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 816 struct vattr *rvap = &mknod_msg->pvnr_va; 817 818 update_va(*ap->a_vpp, NULL, rvap, 819 va_ttl, cn_ttl, SETATTR_CHSIZE); 820 } 821 822 out: 823 vput(dvp); 824 PUFFS_MSG_RELEASE(mknod); 825 return error; 826 } 827 828 int 829 puffs_vnop_open(void *v) 830 { 831 struct vop_open_args /* { 832 const struct vnodeop_desc *a_desc; 833 struct vnode *a_vp; 834 int a_mode; 835 kauth_cred_t a_cred; 836 } */ *ap = v; 837 PUFFS_MSG_VARS(vn, open); 838 struct vnode *vp = ap->a_vp; 839 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 840 int mode = ap->a_mode; 841 int error; 842 843 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 844 845 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 846 ERROUT(EROFS); 847 848 if (!EXISTSOP(pmp, OPEN)) 849 ERROUT(0); 850 851 PUFFS_MSG_ALLOC(vn, open); 852 open_msg->pvnr_mode = mode; 853 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 854 puffs_msg_setinfo(park_open, PUFFSOP_VN, 855 PUFFS_VN_OPEN, VPTOPNC(vp)); 856 857 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 858 error = checkerr(pmp, error, __func__); 859 860 out: 861 DPRINTF(("puffs_open: returning %d\n", error)); 862 PUFFS_MSG_RELEASE(open); 863 return error; 864 } 865 866 int 867 puffs_vnop_close(void *v) 868 { 869 struct vop_close_args /* { 870 const struct vnodeop_desc *a_desc; 871 struct vnode *a_vp; 872 int a_fflag; 873 kauth_cred_t a_cred; 874 } */ *ap = v; 875 PUFFS_MSG_VARS(vn, close); 876 struct vnode *vp = ap->a_vp; 877 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 878 879 PUFFS_MSG_ALLOC(vn, close); 880 puffs_msg_setfaf(park_close); 881 close_msg->pvnr_fflag = ap->a_fflag; 882 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 883 puffs_msg_setinfo(park_close, PUFFSOP_VN, 884 PUFFS_VN_CLOSE, VPTOPNC(vp)); 885 886 puffs_msg_enqueue(pmp, park_close); 887 PUFFS_MSG_RELEASE(close); 888 return 0; 889 } 890 891 int 892 puffs_vnop_access(void *v) 893 { 894 struct vop_access_args /* { 895 const struct vnodeop_desc *a_desc; 896 struct vnode *a_vp; 897 int a_mode; 898 kauth_cred_t a_cred; 899 } */ *ap = v; 900 PUFFS_MSG_VARS(vn, access); 901 struct vnode *vp = ap->a_vp; 902 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 903 int mode = ap->a_mode; 904 int error; 905 906 if (mode & VWRITE) { 907 switch (vp->v_type) { 908 case VDIR: 909 case VLNK: 910 case VREG: 911 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 912 || !EXISTSOP(pmp, WRITE)) 913 return EROFS; 914 break; 915 default: 916 break; 917 } 918 } 919 920 if (!EXISTSOP(pmp, ACCESS)) 921 return 0; 922 923 PUFFS_MSG_ALLOC(vn, access); 924 access_msg->pvnr_mode = ap->a_mode; 925 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 926 puffs_msg_setinfo(park_access, PUFFSOP_VN, 927 PUFFS_VN_ACCESS, VPTOPNC(vp)); 928 929 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 930 error = checkerr(pmp, error, __func__); 931 PUFFS_MSG_RELEASE(access); 932 933 return error; 934 } 935 936 static void 937 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 938 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 939 { 940 struct puffs_node *pn = VPTOPP(vp); 941 942 if (TTL_VALID(cn_ttl)) { 943 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 944 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 945 } 946 947 /* 948 * Don't listen to the file server regarding special device 949 * size info, the file server doesn't know anything about them. 950 */ 951 if (vp->v_type == VBLK || vp->v_type == VCHR) 952 rvap->va_size = vp->v_size; 953 954 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 955 if (vp->v_type == VBLK) 956 rvap->va_blocksize = BLKDEV_IOSIZE; 957 else if (vp->v_type == VCHR) 958 rvap->va_blocksize = MAXBSIZE; 959 960 if (vap != NULL) { 961 (void) memcpy(vap, rvap, sizeof(struct vattr)); 962 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 963 964 if (pn->pn_stat & PNODE_METACACHE_ATIME) 965 vap->va_atime = pn->pn_mc_atime; 966 if (pn->pn_stat & PNODE_METACACHE_CTIME) 967 vap->va_ctime = pn->pn_mc_ctime; 968 if (pn->pn_stat & PNODE_METACACHE_MTIME) 969 vap->va_mtime = pn->pn_mc_mtime; 970 if (pn->pn_stat & PNODE_METACACHE_SIZE) 971 vap->va_size = pn->pn_mc_size; 972 } 973 974 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 975 if (rvap->va_size != VNOVAL 976 && vp->v_type != VBLK && vp->v_type != VCHR) { 977 uvm_vnp_setsize(vp, rvap->va_size); 978 pn->pn_serversize = rvap->va_size; 979 } 980 } 981 982 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 983 if (pn->pn_va_cache == NULL) 984 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 985 986 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 987 988 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 989 } 990 } 991 992 int 993 puffs_vnop_getattr(void *v) 994 { 995 struct vop_getattr_args /* { 996 const struct vnodeop_desc *a_desc; 997 struct vnode *a_vp; 998 struct vattr *a_vap; 999 kauth_cred_t a_cred; 1000 } */ *ap = v; 1001 PUFFS_MSG_VARS(vn, getattr); 1002 struct vnode *vp = ap->a_vp; 1003 struct mount *mp = vp->v_mount; 1004 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1005 struct vattr *vap, *rvap; 1006 struct puffs_node *pn = VPTOPP(vp); 1007 struct timespec *va_ttl = NULL; 1008 int error = 0; 1009 1010 /* 1011 * A lock is required so that we do not race with 1012 * setattr, write and fsync when changing vp->v_size. 1013 * This is critical, since setting a stall smaler value 1014 * triggers a file truncate in uvm_vnp_setsize(), which 1015 * most of the time means data corruption (a chunk of 1016 * data is replaced by zeroes). This can be removed if 1017 * we decide one day that VOP_GETATTR must operate on 1018 * a locked vnode. 1019 * 1020 * XXX Should be useless now that VOP_GETATTR has been 1021 * fixed to always require a shared lock at least. 1022 */ 1023 mutex_enter(&pn->pn_sizemtx); 1024 1025 REFPN(pn); 1026 vap = ap->a_vap; 1027 1028 if (PUFFS_USE_FS_TTL(pmp)) { 1029 if (!TIMED_OUT(pn->pn_va_timeout)) { 1030 update_va(vp, vap, pn->pn_va_cache, 1031 NULL, NULL, SETATTR_CHSIZE); 1032 goto out2; 1033 } 1034 } 1035 1036 PUFFS_MSG_ALLOC(vn, getattr); 1037 vattr_null(&getattr_msg->pvnr_va); 1038 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1039 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1040 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1041 1042 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1043 error = checkerr(pmp, error, __func__); 1044 if (error) 1045 goto out; 1046 1047 rvap = &getattr_msg->pvnr_va; 1048 1049 if (PUFFS_USE_FS_TTL(pmp)) 1050 va_ttl = &getattr_msg->pvnr_va_ttl; 1051 1052 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1053 1054 out: 1055 PUFFS_MSG_RELEASE(getattr); 1056 1057 out2: 1058 puffs_releasenode(pn); 1059 1060 mutex_exit(&pn->pn_sizemtx); 1061 1062 return error; 1063 } 1064 1065 static int 1066 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1067 { 1068 PUFFS_MSG_VARS(vn, setattr); 1069 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1070 struct puffs_node *pn = vp->v_data; 1071 int error = 0; 1072 1073 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1074 1075 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1076 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1077 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1078 || vap->va_mode != (mode_t)VNOVAL)) 1079 return EROFS; 1080 1081 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1082 && vp->v_type == VREG && vap->va_size != VNOVAL) 1083 return EROFS; 1084 1085 /* 1086 * Flush metacache first. If we are called with some explicit 1087 * parameters, treat them as information overriding metacache 1088 * information. 1089 */ 1090 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1091 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1092 && vap->va_atime.tv_sec == VNOVAL) 1093 vap->va_atime = pn->pn_mc_atime; 1094 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1095 && vap->va_ctime.tv_sec == VNOVAL) 1096 vap->va_ctime = pn->pn_mc_ctime; 1097 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1098 && vap->va_mtime.tv_sec == VNOVAL) 1099 vap->va_mtime = pn->pn_mc_mtime; 1100 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1101 && vap->va_size == VNOVAL) 1102 vap->va_size = pn->pn_mc_size; 1103 1104 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1105 } 1106 1107 /* 1108 * Flush attribute cache so that another thread do 1109 * not get a stale value during the operation. 1110 */ 1111 if (PUFFS_USE_FS_TTL(pmp)) 1112 pn->pn_va_timeout = 0; 1113 1114 PUFFS_MSG_ALLOC(vn, setattr); 1115 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1116 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1117 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1118 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1119 if (flags & SETATTR_ASYNC) 1120 puffs_msg_setfaf(park_setattr); 1121 1122 puffs_msg_enqueue(pmp, park_setattr); 1123 if ((flags & SETATTR_ASYNC) == 0) 1124 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1125 1126 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1127 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1128 struct vattr *rvap = &setattr_msg->pvnr_va; 1129 1130 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1131 } 1132 1133 PUFFS_MSG_RELEASE(setattr); 1134 if ((flags & SETATTR_ASYNC) == 0) { 1135 error = checkerr(pmp, error, __func__); 1136 if (error) 1137 return error; 1138 } else { 1139 error = 0; 1140 } 1141 1142 if (vap->va_size != VNOVAL) { 1143 pn->pn_serversize = vap->va_size; 1144 if (flags & SETATTR_CHSIZE) 1145 uvm_vnp_setsize(vp, vap->va_size); 1146 } 1147 1148 return 0; 1149 } 1150 1151 int 1152 puffs_vnop_setattr(void *v) 1153 { 1154 struct vop_getattr_args /* { 1155 const struct vnodeop_desc *a_desc; 1156 struct vnode *a_vp; 1157 struct vattr *a_vap; 1158 kauth_cred_t a_cred; 1159 } */ *ap = v; 1160 struct puffs_node *pn = ap->a_vp->v_data; 1161 int error; 1162 1163 mutex_enter(&pn->pn_sizemtx); 1164 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1165 mutex_exit(&pn->pn_sizemtx); 1166 1167 return error; 1168 } 1169 1170 static __inline int 1171 doinact(struct puffs_mount *pmp, int iaflag) 1172 { 1173 1174 if (EXISTSOP(pmp, INACTIVE)) 1175 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1176 if (iaflag || ALLOPS(pmp)) 1177 return 1; 1178 else 1179 return 0; 1180 else 1181 return 1; 1182 else 1183 return 0; 1184 } 1185 1186 static void 1187 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1188 { 1189 int error; 1190 PUFFS_MSG_VARS(vn, inactive); 1191 1192 if (doinact(pmp, iaflag)) { 1193 PUFFS_MSG_ALLOC(vn, inactive); 1194 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1195 PUFFS_VN_INACTIVE, ck); 1196 1197 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1198 PUFFS_MSG_RELEASE(inactive); 1199 } 1200 } 1201 1202 /* XXX: callinactive can't setback */ 1203 int 1204 puffs_vnop_inactive(void *v) 1205 { 1206 struct vop_inactive_args /* { 1207 const struct vnodeop_desc *a_desc; 1208 struct vnode *a_vp; 1209 } */ *ap = v; 1210 PUFFS_MSG_VARS(vn, inactive); 1211 struct vnode *vp = ap->a_vp; 1212 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1213 struct puffs_node *pnode; 1214 bool recycle = false; 1215 int error; 1216 1217 pnode = vp->v_data; 1218 mutex_enter(&pnode->pn_sizemtx); 1219 1220 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1221 flushvncache(vp, 0, 0, false); 1222 PUFFS_MSG_ALLOC(vn, inactive); 1223 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1224 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1225 1226 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1227 NULL, error); 1228 PUFFS_MSG_RELEASE(inactive); 1229 } 1230 pnode->pn_stat &= ~PNODE_DOINACT; 1231 1232 /* 1233 * file server thinks it's gone? then don't be afraid care, 1234 * node's life was already all it would ever be 1235 */ 1236 if (pnode->pn_stat & PNODE_NOREFS) { 1237 pnode->pn_stat |= PNODE_DYING; 1238 recycle = true; 1239 } 1240 1241 /* 1242 * Handle node TTL. 1243 * If grace has already timed out, make it reclaimed. 1244 * Otherwise, we queue its expiration by sop thread, so 1245 * that it does not remain for ages in the freelist, 1246 * holding memory in userspace, while we will have 1247 * to look it up again anyway. 1248 */ 1249 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1250 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1251 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1252 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1253 1254 if (!incache && !ingrace && !reclaimqueued) { 1255 pnode->pn_stat |= PNODE_DYING; 1256 recycle = true; 1257 } 1258 1259 if (!recycle && !reclaimqueued) { 1260 struct puffs_sopreq *psopr; 1261 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1262 1263 KASSERT(curlwp != uvm.pagedaemon_lwp); 1264 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1265 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1266 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1267 psopr->psopr_at = at; 1268 1269 mutex_enter(&pmp->pmp_sopmtx); 1270 1271 /* 1272 * If thread has disapeared, just give up. The 1273 * fs is being unmounted and the node will be 1274 * be reclaimed anyway. 1275 * 1276 * Otherwise, we queue the request but do not 1277 * immediatly signal the thread, as the node 1278 * has not been expired yet. 1279 */ 1280 if (pmp->pmp_sopthrcount == 0) { 1281 kmem_free(psopr, sizeof(*psopr)); 1282 } else { 1283 TAILQ_INSERT_TAIL(&pmp->pmp_sopslowreqs, 1284 psopr, psopr_entries); 1285 pnode->pn_stat |= PNODE_SOPEXP; 1286 } 1287 1288 mutex_exit(&pmp->pmp_sopmtx); 1289 } 1290 } 1291 1292 *ap->a_recycle = recycle; 1293 1294 mutex_exit(&pnode->pn_sizemtx); 1295 VOP_UNLOCK(vp); 1296 1297 return 0; 1298 } 1299 1300 static void 1301 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1302 { 1303 PUFFS_MSG_VARS(vn, reclaim); 1304 1305 if (!EXISTSOP(pmp, RECLAIM)) 1306 return; 1307 1308 PUFFS_MSG_ALLOC(vn, reclaim); 1309 reclaim_msg->pvnr_nlookup = nlookup; 1310 puffs_msg_setfaf(park_reclaim); 1311 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1312 1313 puffs_msg_enqueue(pmp, park_reclaim); 1314 PUFFS_MSG_RELEASE(reclaim); 1315 return; 1316 } 1317 1318 /* 1319 * always FAF, we don't really care if the server wants to fail to 1320 * reclaim the node or not 1321 */ 1322 int 1323 puffs_vnop_reclaim(void *v) 1324 { 1325 struct vop_reclaim_args /* { 1326 const struct vnodeop_desc *a_desc; 1327 struct vnode *a_vp; 1328 } */ *ap = v; 1329 struct vnode *vp = ap->a_vp; 1330 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1331 struct puffs_node *pnode = vp->v_data; 1332 bool notifyserver = true; 1333 1334 /* 1335 * first things first: check if someone is trying to reclaim the 1336 * root vnode. do not allow that to travel to userspace. 1337 * Note that we don't need to take the lock similarly to 1338 * puffs_root(), since there is only one of us. 1339 */ 1340 if (vp->v_vflag & VV_ROOT) { 1341 mutex_enter(&pmp->pmp_lock); 1342 KASSERT(pmp->pmp_root != NULL); 1343 pmp->pmp_root = NULL; 1344 mutex_exit(&pmp->pmp_lock); 1345 notifyserver = false; 1346 } 1347 1348 /* 1349 * purge info from kernel before issueing FAF, since we 1350 * don't really know when we'll get around to it after 1351 * that and someone might race us into node creation 1352 */ 1353 mutex_enter(&pmp->pmp_lock); 1354 LIST_REMOVE(pnode, pn_hashent); 1355 if (PUFFS_USE_NAMECACHE(pmp)) 1356 cache_purge(vp); 1357 mutex_exit(&pmp->pmp_lock); 1358 1359 if (notifyserver) { 1360 int nlookup = VPTOPP(vp)->pn_nlookup; 1361 1362 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1363 } 1364 1365 puffs_putvnode(vp); 1366 vp->v_data = NULL; 1367 1368 return 0; 1369 } 1370 1371 #define CSIZE sizeof(**ap->a_cookies) 1372 int 1373 puffs_vnop_readdir(void *v) 1374 { 1375 struct vop_readdir_args /* { 1376 const struct vnodeop_desc *a_desc; 1377 struct vnode *a_vp; 1378 struct uio *a_uio; 1379 kauth_cred_t a_cred; 1380 int *a_eofflag; 1381 off_t **a_cookies; 1382 int *a_ncookies; 1383 } */ *ap = v; 1384 PUFFS_MSG_VARS(vn, readdir); 1385 struct vnode *vp = ap->a_vp; 1386 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1387 size_t argsize, tomove, cookiemem, cookiesmax; 1388 struct uio *uio = ap->a_uio; 1389 size_t howmuch, resid; 1390 int error; 1391 1392 /* 1393 * ok, so we need: resid + cookiemem = maxreq 1394 * => resid + cookiesize * (resid/minsize) = maxreq 1395 * => resid + cookiesize/minsize * resid = maxreq 1396 * => (cookiesize/minsize + 1) * resid = maxreq 1397 * => resid = maxreq / (cookiesize/minsize + 1) 1398 * 1399 * Since cookiesize <= minsize and we're not very big on floats, 1400 * we approximate that to be 1. Therefore: 1401 * 1402 * resid = maxreq / 2; 1403 * 1404 * Well, at least we didn't have to use differential equations 1405 * or the Gram-Schmidt process. 1406 * 1407 * (yes, I'm very afraid of this) 1408 */ 1409 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1410 1411 if (ap->a_cookies) { 1412 KASSERT(ap->a_ncookies != NULL); 1413 if (pmp->pmp_args.pa_fhsize == 0) 1414 return EOPNOTSUPP; 1415 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1416 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1417 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1418 } else { 1419 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1420 cookiesmax = 0; 1421 cookiemem = 0; 1422 } 1423 1424 argsize = sizeof(struct puffs_vnmsg_readdir); 1425 tomove = resid + cookiemem; 1426 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1427 (void *)&readdir_msg, 1); 1428 1429 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1430 readdir_msg->pvnr_offset = uio->uio_offset; 1431 readdir_msg->pvnr_resid = resid; 1432 readdir_msg->pvnr_ncookies = cookiesmax; 1433 readdir_msg->pvnr_eofflag = 0; 1434 readdir_msg->pvnr_dentoff = cookiemem; 1435 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1436 PUFFS_VN_READDIR, VPTOPNC(vp)); 1437 puffs_msg_setdelta(park_readdir, tomove); 1438 1439 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1440 error = checkerr(pmp, error, __func__); 1441 if (error) 1442 goto out; 1443 1444 /* userspace is cheating? */ 1445 if (readdir_msg->pvnr_resid > resid) { 1446 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1447 "resid grew", VPTOPNC(vp)); 1448 ERROUT(EPROTO); 1449 } 1450 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1451 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1452 "too many cookies", VPTOPNC(vp)); 1453 ERROUT(EPROTO); 1454 } 1455 1456 /* check eof */ 1457 if (readdir_msg->pvnr_eofflag) 1458 *ap->a_eofflag = 1; 1459 1460 /* bouncy-wouncy with the directory data */ 1461 howmuch = resid - readdir_msg->pvnr_resid; 1462 1463 /* force eof if no data was returned (getcwd() needs this) */ 1464 if (howmuch == 0) { 1465 *ap->a_eofflag = 1; 1466 goto out; 1467 } 1468 1469 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1470 if (error) 1471 goto out; 1472 1473 /* provide cookies to caller if so desired */ 1474 if (ap->a_cookies) { 1475 KASSERT(curlwp != uvm.pagedaemon_lwp); 1476 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1477 M_TEMP, M_WAITOK); 1478 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1479 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1480 *ap->a_ncookies*CSIZE); 1481 } 1482 1483 /* next readdir starts here */ 1484 uio->uio_offset = readdir_msg->pvnr_offset; 1485 1486 out: 1487 puffs_msgmem_release(park_readdir); 1488 return error; 1489 } 1490 #undef CSIZE 1491 1492 /* 1493 * poll works by consuming the bitmask in pn_revents. If there are 1494 * events available, poll returns immediately. If not, it issues a 1495 * poll to userspace, selrecords itself and returns with no available 1496 * events. When the file server returns, it executes puffs_parkdone_poll(), 1497 * where available events are added to the bitmask. selnotify() is 1498 * then also executed by that function causing us to enter here again 1499 * and hopefully find the missing bits (unless someone got them first, 1500 * in which case it starts all over again). 1501 */ 1502 int 1503 puffs_vnop_poll(void *v) 1504 { 1505 struct vop_poll_args /* { 1506 const struct vnodeop_desc *a_desc; 1507 struct vnode *a_vp; 1508 int a_events; 1509 } */ *ap = v; 1510 PUFFS_MSG_VARS(vn, poll); 1511 struct vnode *vp = ap->a_vp; 1512 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1513 struct puffs_node *pn = vp->v_data; 1514 int events, error; 1515 1516 if (EXISTSOP(pmp, POLL)) { 1517 mutex_enter(&pn->pn_mtx); 1518 events = pn->pn_revents & ap->a_events; 1519 if (events & ap->a_events) { 1520 pn->pn_revents &= ~ap->a_events; 1521 mutex_exit(&pn->pn_mtx); 1522 1523 return events; 1524 } else { 1525 puffs_referencenode(pn); 1526 mutex_exit(&pn->pn_mtx); 1527 1528 PUFFS_MSG_ALLOC(vn, poll); 1529 poll_msg->pvnr_events = ap->a_events; 1530 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1531 PUFFS_VN_POLL, VPTOPNC(vp)); 1532 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1533 selrecord(curlwp, &pn->pn_sel); 1534 1535 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1536 NULL, error); 1537 PUFFS_MSG_RELEASE(poll); 1538 1539 return 0; 1540 } 1541 } else { 1542 return genfs_poll(v); 1543 } 1544 } 1545 1546 static int 1547 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1548 { 1549 struct puffs_node *pn = VPTOPP(vp); 1550 struct vattr va; 1551 int pflags, error; 1552 1553 /* flush out information from our metacache, see vop_setattr */ 1554 if (pn->pn_stat & PNODE_METACACHE_MASK 1555 && (pn->pn_stat & PNODE_DYING) == 0) { 1556 vattr_null(&va); 1557 error = dosetattr(vp, &va, FSCRED, 1558 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1559 if (error) 1560 return error; 1561 } 1562 1563 /* 1564 * flush pages to avoid being overly dirty 1565 */ 1566 pflags = PGO_CLEANIT; 1567 if (wait) 1568 pflags |= PGO_SYNCIO; 1569 1570 mutex_enter(vp->v_interlock); 1571 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1572 } 1573 1574 int 1575 puffs_vnop_fsync(void *v) 1576 { 1577 struct vop_fsync_args /* { 1578 const struct vnodeop_desc *a_desc; 1579 struct vnode *a_vp; 1580 kauth_cred_t a_cred; 1581 int a_flags; 1582 off_t a_offlo; 1583 off_t a_offhi; 1584 } */ *ap = v; 1585 PUFFS_MSG_VARS(vn, fsync); 1586 struct vnode *vp; 1587 struct puffs_node *pn; 1588 struct puffs_mount *pmp; 1589 int error, dofaf; 1590 1591 vp = ap->a_vp; 1592 KASSERT(vp != NULL); 1593 pn = VPTOPP(vp); 1594 KASSERT(pn != NULL); 1595 pmp = MPTOPUFFSMP(vp->v_mount); 1596 if (ap->a_flags & FSYNC_WAIT) { 1597 mutex_enter(&pn->pn_sizemtx); 1598 } else { 1599 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1600 return EDEADLK; 1601 } 1602 1603 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1604 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1605 if (error) 1606 goto out; 1607 1608 /* 1609 * HELLO! We exit already here if the user server does not 1610 * support fsync OR if we should call fsync for a node which 1611 * has references neither in the kernel or the fs server. 1612 * Otherwise we continue to issue fsync() forward. 1613 */ 1614 error = 0; 1615 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1616 goto out; 1617 1618 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1619 /* 1620 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1621 * only FAFs for those. Otherwise there's a danger of deadlock, 1622 * since the execution context here might be the user server 1623 * doing some operation on another fs, which in turn caused a 1624 * vnode to be reclaimed from the freelist for this fs. 1625 */ 1626 if (dofaf == 0) { 1627 mutex_enter(vp->v_interlock); 1628 if (vp->v_iflag & VI_XLOCK) 1629 dofaf = 1; 1630 mutex_exit(vp->v_interlock); 1631 } 1632 1633 PUFFS_MSG_ALLOC(vn, fsync); 1634 if (dofaf) 1635 puffs_msg_setfaf(park_fsync); 1636 1637 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1638 fsync_msg->pvnr_flags = ap->a_flags; 1639 fsync_msg->pvnr_offlo = ap->a_offlo; 1640 fsync_msg->pvnr_offhi = ap->a_offhi; 1641 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1642 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1643 1644 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1645 PUFFS_MSG_RELEASE(fsync); 1646 1647 error = checkerr(pmp, error, __func__); 1648 1649 out: 1650 mutex_exit(&pn->pn_sizemtx); 1651 return error; 1652 } 1653 1654 int 1655 puffs_vnop_seek(void *v) 1656 { 1657 struct vop_seek_args /* { 1658 const struct vnodeop_desc *a_desc; 1659 struct vnode *a_vp; 1660 off_t a_oldoff; 1661 off_t a_newoff; 1662 kauth_cred_t a_cred; 1663 } */ *ap = v; 1664 PUFFS_MSG_VARS(vn, seek); 1665 struct vnode *vp = ap->a_vp; 1666 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1667 int error; 1668 1669 PUFFS_MSG_ALLOC(vn, seek); 1670 seek_msg->pvnr_oldoff = ap->a_oldoff; 1671 seek_msg->pvnr_newoff = ap->a_newoff; 1672 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1673 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1674 PUFFS_VN_SEEK, VPTOPNC(vp)); 1675 1676 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1677 PUFFS_MSG_RELEASE(seek); 1678 return checkerr(pmp, error, __func__); 1679 } 1680 1681 static int 1682 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1683 struct componentname *cnp) 1684 { 1685 PUFFS_MSG_VARS(vn, remove); 1686 int error; 1687 1688 PUFFS_MSG_ALLOC(vn, remove); 1689 remove_msg->pvnr_cookie_targ = ck; 1690 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1691 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1692 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1693 1694 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1695 PUFFS_MSG_RELEASE(remove); 1696 1697 return checkerr(pmp, error, __func__); 1698 } 1699 1700 /* 1701 * XXX: can't use callremove now because can't catch setbacks with 1702 * it due to lack of a pnode argument. 1703 */ 1704 int 1705 puffs_vnop_remove(void *v) 1706 { 1707 struct vop_remove_args /* { 1708 const struct vnodeop_desc *a_desc; 1709 struct vnode *a_dvp; 1710 struct vnode *a_vp; 1711 struct componentname *a_cnp; 1712 } */ *ap = v; 1713 PUFFS_MSG_VARS(vn, remove); 1714 struct vnode *dvp = ap->a_dvp; 1715 struct vnode *vp = ap->a_vp; 1716 struct puffs_node *dpn = VPTOPP(dvp); 1717 struct puffs_node *pn = VPTOPP(vp); 1718 struct componentname *cnp = ap->a_cnp; 1719 struct mount *mp = dvp->v_mount; 1720 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1721 int error; 1722 1723 PUFFS_MSG_ALLOC(vn, remove); 1724 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1725 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1726 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1727 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1728 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1729 1730 puffs_msg_enqueue(pmp, park_remove); 1731 REFPN_AND_UNLOCKVP(dvp, dpn); 1732 if (dvp == vp) 1733 REFPN(pn); 1734 else 1735 REFPN_AND_UNLOCKVP(vp, pn); 1736 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1737 1738 PUFFS_MSG_RELEASE(remove); 1739 1740 RELEPN_AND_VP(dvp, dpn); 1741 RELEPN_AND_VP(vp, pn); 1742 1743 error = checkerr(pmp, error, __func__); 1744 return error; 1745 } 1746 1747 int 1748 puffs_vnop_mkdir(void *v) 1749 { 1750 struct vop_mkdir_args /* { 1751 const struct vnodeop_desc *a_desc; 1752 struct vnode *a_dvp; 1753 struct vnode **a_vpp; 1754 struct componentname *a_cnp; 1755 struct vattr *a_vap; 1756 } */ *ap = v; 1757 PUFFS_MSG_VARS(vn, mkdir); 1758 struct vnode *dvp = ap->a_dvp; 1759 struct puffs_node *dpn = VPTOPP(dvp); 1760 struct componentname *cnp = ap->a_cnp; 1761 struct mount *mp = dvp->v_mount; 1762 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1763 int error; 1764 1765 PUFFS_MSG_ALLOC(vn, mkdir); 1766 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1767 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1768 mkdir_msg->pvnr_va = *ap->a_vap; 1769 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1770 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1771 1772 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1773 1774 error = checkerr(pmp, error, __func__); 1775 if (error) 1776 goto out; 1777 1778 error = puffs_newnode(mp, dvp, ap->a_vpp, 1779 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1780 if (error) { 1781 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1782 mkdir_msg->pvnr_newnode, cnp); 1783 goto out; 1784 } 1785 1786 if (PUFFS_USE_FS_TTL(pmp)) { 1787 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1788 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1789 struct vattr *rvap = &mkdir_msg->pvnr_va; 1790 1791 update_va(*ap->a_vpp, NULL, rvap, 1792 va_ttl, cn_ttl, SETATTR_CHSIZE); 1793 } 1794 1795 out: 1796 vput(dvp); 1797 PUFFS_MSG_RELEASE(mkdir); 1798 return error; 1799 } 1800 1801 static int 1802 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1803 struct componentname *cnp) 1804 { 1805 PUFFS_MSG_VARS(vn, rmdir); 1806 int error; 1807 1808 PUFFS_MSG_ALLOC(vn, rmdir); 1809 rmdir_msg->pvnr_cookie_targ = ck; 1810 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1811 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1812 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1813 1814 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1815 PUFFS_MSG_RELEASE(rmdir); 1816 1817 return checkerr(pmp, error, __func__); 1818 } 1819 1820 int 1821 puffs_vnop_rmdir(void *v) 1822 { 1823 struct vop_rmdir_args /* { 1824 const struct vnodeop_desc *a_desc; 1825 struct vnode *a_dvp; 1826 struct vnode *a_vp; 1827 struct componentname *a_cnp; 1828 } */ *ap = v; 1829 PUFFS_MSG_VARS(vn, rmdir); 1830 struct vnode *dvp = ap->a_dvp; 1831 struct vnode *vp = ap->a_vp; 1832 struct puffs_node *dpn = VPTOPP(dvp); 1833 struct puffs_node *pn = VPTOPP(vp); 1834 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1835 struct componentname *cnp = ap->a_cnp; 1836 int error; 1837 1838 PUFFS_MSG_ALLOC(vn, rmdir); 1839 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1840 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1841 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1842 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1843 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1844 1845 puffs_msg_enqueue(pmp, park_rmdir); 1846 REFPN_AND_UNLOCKVP(dvp, dpn); 1847 REFPN_AND_UNLOCKVP(vp, pn); 1848 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1849 1850 PUFFS_MSG_RELEASE(rmdir); 1851 1852 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1853 RELEPN_AND_VP(dvp, dpn); 1854 RELEPN_AND_VP(vp, pn); 1855 1856 return error; 1857 } 1858 1859 int 1860 puffs_vnop_link(void *v) 1861 { 1862 struct vop_link_args /* { 1863 const struct vnodeop_desc *a_desc; 1864 struct vnode *a_dvp; 1865 struct vnode *a_vp; 1866 struct componentname *a_cnp; 1867 } */ *ap = v; 1868 PUFFS_MSG_VARS(vn, link); 1869 struct vnode *dvp = ap->a_dvp; 1870 struct vnode *vp = ap->a_vp; 1871 struct puffs_node *dpn = VPTOPP(dvp); 1872 struct puffs_node *pn = VPTOPP(vp); 1873 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1874 struct componentname *cnp = ap->a_cnp; 1875 int error; 1876 1877 PUFFS_MSG_ALLOC(vn, link); 1878 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1879 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1880 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1881 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1882 PUFFS_VN_LINK, VPTOPNC(dvp)); 1883 1884 puffs_msg_enqueue(pmp, park_link); 1885 REFPN_AND_UNLOCKVP(dvp, dpn); 1886 REFPN(pn); 1887 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1888 1889 PUFFS_MSG_RELEASE(link); 1890 1891 error = checkerr(pmp, error, __func__); 1892 1893 /* 1894 * XXX: stay in touch with the cache. I don't like this, but 1895 * don't have a better solution either. See also puffs_rename(). 1896 */ 1897 if (error == 0) 1898 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1899 1900 RELEPN_AND_VP(dvp, dpn); 1901 puffs_releasenode(pn); 1902 1903 return error; 1904 } 1905 1906 int 1907 puffs_vnop_symlink(void *v) 1908 { 1909 struct vop_symlink_args /* { 1910 const struct vnodeop_desc *a_desc; 1911 struct vnode *a_dvp; 1912 struct vnode **a_vpp; 1913 struct componentname *a_cnp; 1914 struct vattr *a_vap; 1915 char *a_target; 1916 } */ *ap = v; 1917 PUFFS_MSG_VARS(vn, symlink); 1918 struct vnode *dvp = ap->a_dvp; 1919 struct puffs_node *dpn = VPTOPP(dvp); 1920 struct mount *mp = dvp->v_mount; 1921 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1922 struct componentname *cnp = ap->a_cnp; 1923 int error; 1924 1925 *ap->a_vpp = NULL; 1926 1927 PUFFS_MSG_ALLOC(vn, symlink); 1928 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1929 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1930 symlink_msg->pvnr_va = *ap->a_vap; 1931 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1932 sizeof(symlink_msg->pvnr_link)); 1933 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1934 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1935 1936 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1937 1938 error = checkerr(pmp, error, __func__); 1939 if (error) 1940 goto out; 1941 1942 error = puffs_newnode(mp, dvp, ap->a_vpp, 1943 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1944 if (error) { 1945 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1946 symlink_msg->pvnr_newnode, cnp); 1947 goto out; 1948 } 1949 1950 if (PUFFS_USE_FS_TTL(pmp)) { 1951 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 1952 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 1953 struct vattr *rvap = &symlink_msg->pvnr_va; 1954 1955 update_va(*ap->a_vpp, NULL, rvap, 1956 va_ttl, cn_ttl, SETATTR_CHSIZE); 1957 } 1958 1959 out: 1960 vput(dvp); 1961 PUFFS_MSG_RELEASE(symlink); 1962 1963 return error; 1964 } 1965 1966 int 1967 puffs_vnop_readlink(void *v) 1968 { 1969 struct vop_readlink_args /* { 1970 const struct vnodeop_desc *a_desc; 1971 struct vnode *a_vp; 1972 struct uio *a_uio; 1973 kauth_cred_t a_cred; 1974 } */ *ap = v; 1975 PUFFS_MSG_VARS(vn, readlink); 1976 struct vnode *vp = ap->a_vp; 1977 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1978 size_t linklen; 1979 int error; 1980 1981 PUFFS_MSG_ALLOC(vn, readlink); 1982 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1983 linklen = sizeof(readlink_msg->pvnr_link); 1984 readlink_msg->pvnr_linklen = linklen; 1985 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1986 PUFFS_VN_READLINK, VPTOPNC(vp)); 1987 1988 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1989 error = checkerr(pmp, error, __func__); 1990 if (error) 1991 goto out; 1992 1993 /* bad bad user file server */ 1994 if (readlink_msg->pvnr_linklen > linklen) { 1995 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1996 "linklen too big", VPTOPNC(ap->a_vp)); 1997 error = EPROTO; 1998 goto out; 1999 } 2000 2001 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2002 ap->a_uio); 2003 out: 2004 PUFFS_MSG_RELEASE(readlink); 2005 return error; 2006 } 2007 2008 int 2009 puffs_vnop_rename(void *v) 2010 { 2011 struct vop_rename_args /* { 2012 const struct vnodeop_desc *a_desc; 2013 struct vnode *a_fdvp; 2014 struct vnode *a_fvp; 2015 struct componentname *a_fcnp; 2016 struct vnode *a_tdvp; 2017 struct vnode *a_tvp; 2018 struct componentname *a_tcnp; 2019 } */ *ap = v; 2020 PUFFS_MSG_VARS(vn, rename); 2021 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2022 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2023 struct puffs_node *fpn = ap->a_fvp->v_data; 2024 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2025 int error; 2026 bool doabort = true; 2027 2028 if ((fvp->v_mount != tdvp->v_mount) || 2029 (tvp && (fvp->v_mount != tvp->v_mount))) { 2030 ERROUT(EXDEV); 2031 } 2032 2033 PUFFS_MSG_ALLOC(vn, rename); 2034 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2035 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2036 if (tvp) 2037 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2038 else 2039 rename_msg->pvnr_cookie_targ = NULL; 2040 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2041 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2042 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2043 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2044 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2045 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2046 2047 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2048 doabort = false; 2049 PUFFS_MSG_RELEASE(rename); 2050 error = checkerr(pmp, error, __func__); 2051 2052 /* 2053 * XXX: stay in touch with the cache. I don't like this, but 2054 * don't have a better solution either. See also puffs_link(). 2055 */ 2056 if (error == 0) 2057 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2058 2059 out: 2060 if (doabort) 2061 VOP_ABORTOP(tdvp, ap->a_tcnp); 2062 if (tvp != NULL) 2063 vput(tvp); 2064 if (tdvp == tvp) 2065 vrele(tdvp); 2066 else 2067 vput(tdvp); 2068 2069 if (doabort) 2070 VOP_ABORTOP(fdvp, ap->a_fcnp); 2071 vrele(fdvp); 2072 vrele(fvp); 2073 2074 return error; 2075 } 2076 2077 #define RWARGS(cont, iofl, move, offset, creds) \ 2078 (cont)->pvnr_ioflag = (iofl); \ 2079 (cont)->pvnr_resid = (move); \ 2080 (cont)->pvnr_offset = (offset); \ 2081 puffs_credcvt(&(cont)->pvnr_cred, creds) 2082 2083 int 2084 puffs_vnop_read(void *v) 2085 { 2086 struct vop_read_args /* { 2087 const struct vnodeop_desc *a_desc; 2088 struct vnode *a_vp; 2089 struct uio *a_uio; 2090 int a_ioflag; 2091 kauth_cred_t a_cred; 2092 } */ *ap = v; 2093 PUFFS_MSG_VARS(vn, read); 2094 struct vnode *vp = ap->a_vp; 2095 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2096 struct uio *uio = ap->a_uio; 2097 size_t tomove, argsize; 2098 vsize_t bytelen; 2099 int error; 2100 2101 read_msg = NULL; 2102 error = 0; 2103 2104 /* std sanity */ 2105 if (uio->uio_resid == 0) 2106 return 0; 2107 if (uio->uio_offset < 0) 2108 return EINVAL; 2109 2110 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2111 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2112 2113 while (uio->uio_resid > 0) { 2114 if (vp->v_size <= uio->uio_offset) { 2115 break; 2116 } 2117 bytelen = MIN(uio->uio_resid, 2118 vp->v_size - uio->uio_offset); 2119 if (bytelen == 0) 2120 break; 2121 2122 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2123 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2124 if (error) 2125 break; 2126 } 2127 2128 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2129 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2130 } else { 2131 /* 2132 * in case it's not a regular file or we're operating 2133 * uncached, do read in the old-fashioned style, 2134 * i.e. explicit read operations 2135 */ 2136 2137 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2138 argsize = sizeof(struct puffs_vnmsg_read); 2139 puffs_msgmem_alloc(argsize + tomove, &park_read, 2140 (void *)&read_msg, 1); 2141 2142 error = 0; 2143 while (uio->uio_resid > 0) { 2144 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2145 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2146 RWARGS(read_msg, ap->a_ioflag, tomove, 2147 uio->uio_offset, ap->a_cred); 2148 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2149 PUFFS_VN_READ, VPTOPNC(vp)); 2150 puffs_msg_setdelta(park_read, tomove); 2151 2152 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2153 NULL, error); 2154 error = checkerr(pmp, error, __func__); 2155 if (error) 2156 break; 2157 2158 if (read_msg->pvnr_resid > tomove) { 2159 puffs_senderr(pmp, PUFFS_ERR_READ, 2160 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2161 error = EPROTO; 2162 break; 2163 } 2164 2165 error = uiomove(read_msg->pvnr_data, 2166 tomove - read_msg->pvnr_resid, uio); 2167 2168 /* 2169 * in case the file is out of juice, resid from 2170 * userspace is != 0. and the error-case is 2171 * quite obvious 2172 */ 2173 if (error || read_msg->pvnr_resid) 2174 break; 2175 } 2176 2177 puffs_msgmem_release(park_read); 2178 } 2179 2180 return error; 2181 } 2182 2183 /* 2184 * XXX: in case of a failure, this leaves uio in a bad state. 2185 * We could theoretically copy the uio and iovecs and "replay" 2186 * them the right amount after the userspace trip, but don't 2187 * bother for now. 2188 */ 2189 int 2190 puffs_vnop_write(void *v) 2191 { 2192 struct vop_write_args /* { 2193 const struct vnodeop_desc *a_desc; 2194 struct vnode *a_vp; 2195 struct uio *a_uio; 2196 int a_ioflag; 2197 kauth_cred_t a_cred; 2198 } */ *ap = v; 2199 PUFFS_MSG_VARS(vn, write); 2200 struct vnode *vp = ap->a_vp; 2201 struct puffs_node *pn = VPTOPP(vp); 2202 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2203 struct uio *uio = ap->a_uio; 2204 size_t tomove, argsize; 2205 off_t oldoff, newoff, origoff; 2206 vsize_t bytelen; 2207 int error, uflags; 2208 int ubcflags; 2209 2210 error = uflags = 0; 2211 write_msg = NULL; 2212 2213 mutex_enter(&pn->pn_sizemtx); 2214 2215 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2216 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2217 2218 /* 2219 * userspace *should* be allowed to control this, 2220 * but with UBC it's a bit unclear how to handle it 2221 */ 2222 if (ap->a_ioflag & IO_APPEND) 2223 uio->uio_offset = vp->v_size; 2224 2225 origoff = uio->uio_offset; 2226 while (uio->uio_resid > 0) { 2227 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2228 uflags |= PUFFS_UPDATEATIME; 2229 uflags |= PUFFS_UPDATECTIME; 2230 uflags |= PUFFS_UPDATEMTIME; 2231 oldoff = uio->uio_offset; 2232 bytelen = uio->uio_resid; 2233 2234 newoff = oldoff + bytelen; 2235 if (vp->v_size < newoff) { 2236 uvm_vnp_setwritesize(vp, newoff); 2237 } 2238 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2239 UVM_ADV_RANDOM, ubcflags); 2240 2241 /* 2242 * In case of a ubc_uiomove() error, 2243 * opt to not extend the file at all and 2244 * return an error. Otherwise, if we attempt 2245 * to clear the memory we couldn't fault to, 2246 * we might generate a kernel page fault. 2247 */ 2248 if (vp->v_size < newoff) { 2249 if (error == 0) { 2250 uflags |= PUFFS_UPDATESIZE; 2251 uvm_vnp_setsize(vp, newoff); 2252 } else { 2253 uvm_vnp_setwritesize(vp, vp->v_size); 2254 } 2255 } 2256 if (error) 2257 break; 2258 2259 /* 2260 * If we're writing large files, flush to file server 2261 * every 64k. Otherwise we can very easily exhaust 2262 * kernel and user memory, as the file server cannot 2263 * really keep up with our writing speed. 2264 * 2265 * Note: this does *NOT* honor MNT_ASYNC, because 2266 * that gives userland too much say in the kernel. 2267 */ 2268 if (oldoff >> 16 != uio->uio_offset >> 16) { 2269 mutex_enter(vp->v_interlock); 2270 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2271 uio->uio_offset & ~0xffff, 2272 PGO_CLEANIT | PGO_SYNCIO); 2273 if (error) 2274 break; 2275 } 2276 } 2277 2278 /* synchronous I/O? */ 2279 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2280 mutex_enter(vp->v_interlock); 2281 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2282 round_page(uio->uio_offset), 2283 PGO_CLEANIT | PGO_SYNCIO); 2284 2285 /* write through page cache? */ 2286 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2287 mutex_enter(vp->v_interlock); 2288 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2289 round_page(uio->uio_offset), PGO_CLEANIT); 2290 } 2291 2292 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2293 } else { 2294 /* tomove is non-increasing */ 2295 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2296 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2297 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2298 2299 while (uio->uio_resid > 0) { 2300 /* move data to buffer */ 2301 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2302 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2303 RWARGS(write_msg, ap->a_ioflag, tomove, 2304 uio->uio_offset, ap->a_cred); 2305 error = uiomove(write_msg->pvnr_data, tomove, uio); 2306 if (error) 2307 break; 2308 2309 /* move buffer to userspace */ 2310 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2311 PUFFS_VN_WRITE, VPTOPNC(vp)); 2312 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2313 NULL, error); 2314 error = checkerr(pmp, error, __func__); 2315 if (error) 2316 break; 2317 2318 if (write_msg->pvnr_resid > tomove) { 2319 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2320 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2321 error = EPROTO; 2322 break; 2323 } 2324 2325 /* adjust file size */ 2326 if (vp->v_size < uio->uio_offset) 2327 uvm_vnp_setsize(vp, uio->uio_offset); 2328 2329 /* didn't move everything? bad userspace. bail */ 2330 if (write_msg->pvnr_resid != 0) { 2331 error = EIO; 2332 break; 2333 } 2334 } 2335 puffs_msgmem_release(park_write); 2336 } 2337 2338 mutex_exit(&pn->pn_sizemtx); 2339 return error; 2340 } 2341 2342 int 2343 puffs_vnop_print(void *v) 2344 { 2345 struct vop_print_args /* { 2346 struct vnode *a_vp; 2347 } */ *ap = v; 2348 PUFFS_MSG_VARS(vn, print); 2349 struct vnode *vp = ap->a_vp; 2350 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2351 struct puffs_node *pn = vp->v_data; 2352 int error; 2353 2354 /* kernel portion */ 2355 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2356 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2357 if (vp->v_type == VFIFO) 2358 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2359 printf("\n"); 2360 2361 /* userspace portion */ 2362 if (EXISTSOP(pmp, PRINT)) { 2363 PUFFS_MSG_ALLOC(vn, print); 2364 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2365 PUFFS_VN_PRINT, VPTOPNC(vp)); 2366 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2367 NULL, error); 2368 PUFFS_MSG_RELEASE(print); 2369 } 2370 2371 return 0; 2372 } 2373 2374 int 2375 puffs_vnop_pathconf(void *v) 2376 { 2377 struct vop_pathconf_args /* { 2378 const struct vnodeop_desc *a_desc; 2379 struct vnode *a_vp; 2380 int a_name; 2381 register_t *a_retval; 2382 } */ *ap = v; 2383 PUFFS_MSG_VARS(vn, pathconf); 2384 struct vnode *vp = ap->a_vp; 2385 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2386 int error; 2387 2388 PUFFS_MSG_ALLOC(vn, pathconf); 2389 pathconf_msg->pvnr_name = ap->a_name; 2390 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2391 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2392 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2393 error = checkerr(pmp, error, __func__); 2394 if (!error) 2395 *ap->a_retval = pathconf_msg->pvnr_retval; 2396 PUFFS_MSG_RELEASE(pathconf); 2397 2398 return error; 2399 } 2400 2401 int 2402 puffs_vnop_advlock(void *v) 2403 { 2404 struct vop_advlock_args /* { 2405 const struct vnodeop_desc *a_desc; 2406 struct vnode *a_vp; 2407 void *a_id; 2408 int a_op; 2409 struct flock *a_fl; 2410 int a_flags; 2411 } */ *ap = v; 2412 PUFFS_MSG_VARS(vn, advlock); 2413 struct vnode *vp = ap->a_vp; 2414 struct puffs_node *pn = VPTOPP(vp); 2415 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2416 int error; 2417 2418 if (!EXISTSOP(pmp, ADVLOCK)) 2419 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2420 2421 PUFFS_MSG_ALLOC(vn, advlock); 2422 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2423 sizeof(advlock_msg->pvnr_fl)); 2424 advlock_msg->pvnr_id = ap->a_id; 2425 advlock_msg->pvnr_op = ap->a_op; 2426 advlock_msg->pvnr_flags = ap->a_flags; 2427 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2428 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2429 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2430 error = checkerr(pmp, error, __func__); 2431 PUFFS_MSG_RELEASE(advlock); 2432 2433 return error; 2434 } 2435 2436 int 2437 puffs_vnop_abortop(void *v) 2438 { 2439 struct vop_abortop_args /* { 2440 struct vnode *a_dvp; 2441 struct componentname *a_cnp; 2442 }; */ *ap = v; 2443 PUFFS_MSG_VARS(vn, abortop); 2444 struct vnode *dvp = ap->a_dvp; 2445 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2446 struct componentname *cnp = ap->a_cnp; 2447 2448 if (EXISTSOP(pmp, ABORTOP)) { 2449 PUFFS_MSG_ALLOC(vn, abortop); 2450 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2451 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2452 puffs_msg_setfaf(park_abortop); 2453 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2454 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2455 2456 puffs_msg_enqueue(pmp, park_abortop); 2457 PUFFS_MSG_RELEASE(abortop); 2458 } 2459 2460 return genfs_abortop(v); 2461 } 2462 2463 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2464 2465 /* 2466 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2467 */ 2468 int 2469 puffs_vnop_strategy(void *v) 2470 { 2471 struct vop_strategy_args /* { 2472 const struct vnodeop_desc *a_desc; 2473 struct vnode *a_vp; 2474 struct buf *a_bp; 2475 } */ *ap = v; 2476 PUFFS_MSG_VARS(vn, rw); 2477 struct vnode *vp = ap->a_vp; 2478 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2479 struct puffs_node *pn; 2480 struct buf *bp; 2481 size_t argsize; 2482 size_t tomove, moved; 2483 int error, dofaf, cansleep, dobiodone; 2484 2485 pmp = MPTOPUFFSMP(vp->v_mount); 2486 bp = ap->a_bp; 2487 error = 0; 2488 dofaf = 0; 2489 cansleep = 0; 2490 pn = VPTOPP(vp); 2491 park_rw = NULL; /* explicit */ 2492 dobiodone = 1; 2493 2494 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2495 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2496 ERROUT(EOPNOTSUPP); 2497 2498 /* 2499 * Short-circuit optimization: don't flush buffer in between 2500 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2501 */ 2502 if (pn->pn_stat & PNODE_DYING) { 2503 KASSERT(BUF_ISWRITE(bp)); 2504 bp->b_resid = 0; 2505 goto out; 2506 } 2507 2508 #ifdef DIAGNOSTIC 2509 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2510 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2511 bp->b_bcount); 2512 #endif 2513 2514 /* 2515 * See explanation for the necessity of a FAF in puffs_fsync. 2516 * 2517 * Also, do FAF in case we're suspending. 2518 * See puffs_vfsops.c:pageflush() 2519 */ 2520 if (BUF_ISWRITE(bp)) { 2521 mutex_enter(vp->v_interlock); 2522 if (vp->v_iflag & VI_XLOCK) 2523 dofaf = 1; 2524 if (pn->pn_stat & PNODE_FAF) 2525 dofaf = 1; 2526 mutex_exit(vp->v_interlock); 2527 } 2528 2529 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2530 2531 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2532 2533 /* allocate transport structure */ 2534 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2535 argsize = sizeof(struct puffs_vnmsg_rw); 2536 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2537 (void *)&rw_msg, cansleep); 2538 if (error) 2539 goto out; 2540 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2541 2542 /* 2x2 cases: read/write, faf/nofaf */ 2543 if (BUF_ISREAD(bp)) { 2544 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2545 PUFFS_VN_READ, VPTOPNC(vp)); 2546 puffs_msg_setdelta(park_rw, tomove); 2547 if (BIOASYNC(bp)) { 2548 puffs_msg_setcall(park_rw, 2549 puffs_parkdone_asyncbioread, bp); 2550 puffs_msg_enqueue(pmp, park_rw); 2551 dobiodone = 0; 2552 } else { 2553 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2554 NULL, error); 2555 error = checkerr(pmp, error, __func__); 2556 if (error) 2557 goto out; 2558 2559 if (rw_msg->pvnr_resid > tomove) { 2560 puffs_senderr(pmp, PUFFS_ERR_READ, 2561 E2BIG, "resid grew", VPTOPNC(vp)); 2562 ERROUT(EPROTO); 2563 } 2564 2565 moved = tomove - rw_msg->pvnr_resid; 2566 2567 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2568 bp->b_resid = bp->b_bcount - moved; 2569 } 2570 } else { 2571 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2572 PUFFS_VN_WRITE, VPTOPNC(vp)); 2573 /* 2574 * make pages read-only before we write them if we want 2575 * write caching info 2576 */ 2577 if (PUFFS_WCACHEINFO(pmp)) { 2578 struct uvm_object *uobj = &vp->v_uobj; 2579 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2580 struct vm_page *vmp; 2581 int i; 2582 2583 for (i = 0; i < npages; i++) { 2584 vmp= uvm_pageratop((vaddr_t)bp->b_data 2585 + (i << PAGE_SHIFT)); 2586 DPRINTF(("puffs_strategy: write-protecting " 2587 "vp %p page %p, offset %" PRId64"\n", 2588 vp, vmp, vmp->offset)); 2589 mutex_enter(uobj->vmobjlock); 2590 vmp->flags |= PG_RDONLY; 2591 pmap_page_protect(vmp, VM_PROT_READ); 2592 mutex_exit(uobj->vmobjlock); 2593 } 2594 } 2595 2596 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2597 if (dofaf) { 2598 puffs_msg_setfaf(park_rw); 2599 } else if (BIOASYNC(bp)) { 2600 puffs_msg_setcall(park_rw, 2601 puffs_parkdone_asyncbiowrite, bp); 2602 dobiodone = 0; 2603 } 2604 2605 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2606 2607 if (dobiodone == 0) 2608 goto out; 2609 2610 /* 2611 * XXXXXXXX: wrong, but kernel can't survive strategy 2612 * failure currently. Here, have one more X: X. 2613 */ 2614 if (error != ENOMEM) 2615 error = 0; 2616 2617 error = checkerr(pmp, error, __func__); 2618 if (error) 2619 goto out; 2620 2621 if (rw_msg->pvnr_resid > tomove) { 2622 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2623 E2BIG, "resid grew", VPTOPNC(vp)); 2624 ERROUT(EPROTO); 2625 } 2626 2627 /* 2628 * FAF moved everything. Frankly, we don't 2629 * really have a choice. 2630 */ 2631 if (dofaf && error == 0) 2632 moved = tomove; 2633 else 2634 moved = tomove - rw_msg->pvnr_resid; 2635 2636 bp->b_resid = bp->b_bcount - moved; 2637 if (bp->b_resid != 0) { 2638 ERROUT(EIO); 2639 } 2640 } 2641 2642 out: 2643 if (park_rw) 2644 puffs_msgmem_release(park_rw); 2645 2646 if (error) 2647 bp->b_error = error; 2648 2649 if (error || dobiodone) 2650 biodone(bp); 2651 2652 return error; 2653 } 2654 2655 int 2656 puffs_vnop_mmap(void *v) 2657 { 2658 struct vop_mmap_args /* { 2659 const struct vnodeop_desc *a_desc; 2660 struct vnode *a_vp; 2661 vm_prot_t a_prot; 2662 kauth_cred_t a_cred; 2663 } */ *ap = v; 2664 PUFFS_MSG_VARS(vn, mmap); 2665 struct vnode *vp = ap->a_vp; 2666 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2667 int error; 2668 2669 if (!PUFFS_USE_PAGECACHE(pmp)) 2670 return genfs_eopnotsupp(v); 2671 2672 if (EXISTSOP(pmp, MMAP)) { 2673 PUFFS_MSG_ALLOC(vn, mmap); 2674 mmap_msg->pvnr_prot = ap->a_prot; 2675 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2676 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2677 PUFFS_VN_MMAP, VPTOPNC(vp)); 2678 2679 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2680 error = checkerr(pmp, error, __func__); 2681 PUFFS_MSG_RELEASE(mmap); 2682 } else { 2683 error = genfs_mmap(v); 2684 } 2685 2686 return error; 2687 } 2688 2689 2690 /* 2691 * The rest don't get a free trip to userspace and back, they 2692 * have to stay within the kernel. 2693 */ 2694 2695 /* 2696 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2697 * well, maybe somehow, somewhere, some day .... 2698 */ 2699 int 2700 puffs_vnop_bmap(void *v) 2701 { 2702 struct vop_bmap_args /* { 2703 const struct vnodeop_desc *a_desc; 2704 struct vnode *a_vp; 2705 daddr_t a_bn; 2706 struct vnode **a_vpp; 2707 daddr_t *a_bnp; 2708 int *a_runp; 2709 } */ *ap = v; 2710 struct puffs_mount *pmp; 2711 2712 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2713 2714 if (ap->a_vpp) 2715 *ap->a_vpp = ap->a_vp; 2716 if (ap->a_bnp) 2717 *ap->a_bnp = ap->a_bn; 2718 if (ap->a_runp) 2719 *ap->a_runp 2720 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2721 2722 return 0; 2723 } 2724 2725 /* 2726 * Handle getpages faults in puffs. We let genfs_getpages() do most 2727 * of the dirty work, but we come in this route to do accounting tasks. 2728 * If the user server has specified functions for cache notifications 2729 * about reads and/or writes, we record which type of operation we got, 2730 * for which page range, and proceed to issue a FAF notification to the 2731 * server about it. 2732 */ 2733 int 2734 puffs_vnop_getpages(void *v) 2735 { 2736 struct vop_getpages_args /* { 2737 const struct vnodeop_desc *a_desc; 2738 struct vnode *a_vp; 2739 voff_t a_offset; 2740 struct vm_page **a_m; 2741 int *a_count; 2742 int a_centeridx; 2743 vm_prot_t a_access_type; 2744 int a_advice; 2745 int a_flags; 2746 } */ *ap = v; 2747 struct puffs_mount *pmp; 2748 struct puffs_node *pn; 2749 struct vnode *vp; 2750 struct vm_page **pgs; 2751 struct puffs_cacheinfo *pcinfo = NULL; 2752 struct puffs_cacherun *pcrun; 2753 void *parkmem = NULL; 2754 size_t runsizes; 2755 int i, npages, si, streakon; 2756 int error, locked, write; 2757 2758 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2759 npages = *ap->a_count; 2760 pgs = ap->a_m; 2761 vp = ap->a_vp; 2762 pn = vp->v_data; 2763 locked = (ap->a_flags & PGO_LOCKED) != 0; 2764 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2765 2766 /* ccg xnaht - gets Wuninitialized wrong */ 2767 pcrun = NULL; 2768 runsizes = 0; 2769 2770 /* 2771 * Check that we aren't trying to fault in pages which our file 2772 * server doesn't know about. This happens if we extend a file by 2773 * skipping some pages and later try to fault in pages which 2774 * are between pn_serversize and vp_size. This check optimizes 2775 * away the common case where a file is being extended. 2776 */ 2777 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2778 struct vattr va; 2779 2780 /* try again later when we can block */ 2781 if (locked) 2782 ERROUT(EBUSY); 2783 2784 mutex_exit(vp->v_interlock); 2785 vattr_null(&va); 2786 va.va_size = vp->v_size; 2787 error = dosetattr(vp, &va, FSCRED, 0); 2788 if (error) 2789 ERROUT(error); 2790 mutex_enter(vp->v_interlock); 2791 } 2792 2793 if (write && PUFFS_WCACHEINFO(pmp)) { 2794 #ifdef notnowjohn 2795 /* allocate worst-case memory */ 2796 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2797 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2798 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2799 locked ? KM_NOSLEEP : KM_SLEEP); 2800 2801 /* 2802 * can't block if we're locked and can't mess up caching 2803 * information for fs server. so come back later, please 2804 */ 2805 if (pcinfo == NULL) 2806 ERROUT(ENOMEM); 2807 2808 parkmem = puffs_park_alloc(locked == 0); 2809 if (parkmem == NULL) 2810 ERROUT(ENOMEM); 2811 2812 pcrun = pcinfo->pcache_runs; 2813 #else 2814 (void)parkmem; 2815 #endif 2816 } 2817 2818 error = genfs_getpages(v); 2819 if (error) 2820 goto out; 2821 2822 if (PUFFS_WCACHEINFO(pmp) == 0) 2823 goto out; 2824 2825 /* 2826 * Let's see whose fault it was and inform the user server of 2827 * possibly read/written pages. Map pages from read faults 2828 * strictly read-only, since otherwise we might miss info on 2829 * when the page is actually write-faulted to. 2830 */ 2831 if (!locked) 2832 mutex_enter(vp->v_uobj.vmobjlock); 2833 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2834 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2835 if (streakon && write) { 2836 streakon = 0; 2837 pcrun[si].pcache_runend 2838 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2839 si++; 2840 } 2841 continue; 2842 } 2843 if (streakon == 0 && write) { 2844 streakon = 1; 2845 pcrun[si].pcache_runstart = pgs[i]->offset; 2846 } 2847 2848 if (!write) 2849 pgs[i]->flags |= PG_RDONLY; 2850 } 2851 /* was the last page part of our streak? */ 2852 if (streakon) { 2853 pcrun[si].pcache_runend 2854 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2855 si++; 2856 } 2857 if (!locked) 2858 mutex_exit(vp->v_uobj.vmobjlock); 2859 2860 KASSERT(si <= (npages / 2) + 1); 2861 2862 #ifdef notnowjohn 2863 /* send results to userspace */ 2864 if (write) 2865 puffs_cacheop(pmp, parkmem, pcinfo, 2866 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2867 #endif 2868 2869 out: 2870 if (error) { 2871 if (pcinfo != NULL) 2872 kmem_free(pcinfo, 2873 sizeof(struct puffs_cacheinfo) + runsizes); 2874 #ifdef notnowjohn 2875 if (parkmem != NULL) 2876 puffs_park_release(parkmem, 1); 2877 #endif 2878 } 2879 2880 return error; 2881 } 2882 2883 /* 2884 * Extended attribute support. 2885 */ 2886 2887 int 2888 puffs_vnop_getextattr(void *v) 2889 { 2890 struct vop_getextattr_args /* 2891 struct vnode *a_vp; 2892 int a_attrnamespace; 2893 const char *a_name; 2894 struct uio *a_uio; 2895 size_t *a_size; 2896 kauth_cred_t a_cred; 2897 }; */ *ap = v; 2898 PUFFS_MSG_VARS(vn, getextattr); 2899 struct vnode *vp = ap->a_vp; 2900 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2901 int attrnamespace = ap->a_attrnamespace; 2902 const char *name = ap->a_name; 2903 struct uio *uio = ap->a_uio; 2904 size_t *sizep = ap->a_size; 2905 size_t tomove, resid; 2906 int error; 2907 2908 if (uio) 2909 resid = uio->uio_resid; 2910 else 2911 resid = 0; 2912 2913 tomove = PUFFS_TOMOVE(resid, pmp); 2914 if (tomove != resid) { 2915 error = E2BIG; 2916 goto out; 2917 } 2918 2919 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2920 &park_getextattr, (void *)&getextattr_msg, 1); 2921 2922 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2923 strlcpy(getextattr_msg->pvnr_attrname, name, 2924 sizeof(getextattr_msg->pvnr_attrname)); 2925 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2926 if (sizep) 2927 getextattr_msg->pvnr_datasize = 1; 2928 getextattr_msg->pvnr_resid = tomove; 2929 2930 puffs_msg_setinfo(park_getextattr, 2931 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2932 puffs_msg_setdelta(park_getextattr, tomove); 2933 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2934 2935 error = checkerr(pmp, error, __func__); 2936 if (error) 2937 goto out; 2938 2939 resid = getextattr_msg->pvnr_resid; 2940 if (resid > tomove) { 2941 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2942 "resid grew", VPTOPNC(vp)); 2943 error = EPROTO; 2944 goto out; 2945 } 2946 2947 if (sizep) 2948 *sizep = getextattr_msg->pvnr_datasize; 2949 if (uio) 2950 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2951 2952 out: 2953 PUFFS_MSG_RELEASE(getextattr); 2954 return error; 2955 } 2956 2957 int 2958 puffs_vnop_setextattr(void *v) 2959 { 2960 struct vop_setextattr_args /* { 2961 struct vnode *a_vp; 2962 int a_attrnamespace; 2963 const char *a_name; 2964 struct uio *a_uio; 2965 kauth_cred_t a_cred; 2966 }; */ *ap = v; 2967 PUFFS_MSG_VARS(vn, setextattr); 2968 struct vnode *vp = ap->a_vp; 2969 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2970 int attrnamespace = ap->a_attrnamespace; 2971 const char *name = ap->a_name; 2972 struct uio *uio = ap->a_uio; 2973 size_t tomove, resid; 2974 int error; 2975 2976 if (uio) 2977 resid = uio->uio_resid; 2978 else 2979 resid = 0; 2980 2981 tomove = PUFFS_TOMOVE(resid, pmp); 2982 if (tomove != resid) { 2983 error = E2BIG; 2984 goto out; 2985 } 2986 2987 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2988 &park_setextattr, (void *)&setextattr_msg, 1); 2989 2990 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2991 strlcpy(setextattr_msg->pvnr_attrname, name, 2992 sizeof(setextattr_msg->pvnr_attrname)); 2993 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2994 setextattr_msg->pvnr_resid = tomove; 2995 2996 if (uio) { 2997 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2998 if (error) 2999 goto out; 3000 } 3001 3002 puffs_msg_setinfo(park_setextattr, 3003 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3004 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3005 3006 error = checkerr(pmp, error, __func__); 3007 if (error) 3008 goto out; 3009 3010 if (setextattr_msg->pvnr_resid != 0) 3011 error = EIO; 3012 3013 out: 3014 PUFFS_MSG_RELEASE(setextattr); 3015 3016 return error; 3017 } 3018 3019 int 3020 puffs_vnop_listextattr(void *v) 3021 { 3022 struct vop_listextattr_args /* { 3023 struct vnode *a_vp; 3024 int a_attrnamespace; 3025 struct uio *a_uio; 3026 size_t *a_size; 3027 int a_flag, 3028 kauth_cred_t a_cred; 3029 }; */ *ap = v; 3030 PUFFS_MSG_VARS(vn, listextattr); 3031 struct vnode *vp = ap->a_vp; 3032 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3033 int attrnamespace = ap->a_attrnamespace; 3034 struct uio *uio = ap->a_uio; 3035 size_t *sizep = ap->a_size; 3036 int flag = ap->a_flag; 3037 size_t tomove, resid; 3038 int error; 3039 3040 if (uio) 3041 resid = uio->uio_resid; 3042 else 3043 resid = 0; 3044 3045 tomove = PUFFS_TOMOVE(resid, pmp); 3046 if (tomove != resid) { 3047 error = E2BIG; 3048 goto out; 3049 } 3050 3051 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3052 &park_listextattr, (void *)&listextattr_msg, 1); 3053 3054 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3055 listextattr_msg->pvnr_flag = flag; 3056 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3057 listextattr_msg->pvnr_resid = tomove; 3058 if (sizep) 3059 listextattr_msg->pvnr_datasize = 1; 3060 3061 puffs_msg_setinfo(park_listextattr, 3062 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3063 puffs_msg_setdelta(park_listextattr, tomove); 3064 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3065 3066 error = checkerr(pmp, error, __func__); 3067 if (error) 3068 goto out; 3069 3070 resid = listextattr_msg->pvnr_resid; 3071 if (resid > tomove) { 3072 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3073 "resid grew", VPTOPNC(vp)); 3074 error = EPROTO; 3075 goto out; 3076 } 3077 3078 if (sizep) 3079 *sizep = listextattr_msg->pvnr_datasize; 3080 if (uio) 3081 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3082 3083 out: 3084 PUFFS_MSG_RELEASE(listextattr); 3085 return error; 3086 } 3087 3088 int 3089 puffs_vnop_deleteextattr(void *v) 3090 { 3091 struct vop_deleteextattr_args /* { 3092 struct vnode *a_vp; 3093 int a_attrnamespace; 3094 const char *a_name; 3095 kauth_cred_t a_cred; 3096 }; */ *ap = v; 3097 PUFFS_MSG_VARS(vn, deleteextattr); 3098 struct vnode *vp = ap->a_vp; 3099 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3100 int attrnamespace = ap->a_attrnamespace; 3101 const char *name = ap->a_name; 3102 int error; 3103 3104 PUFFS_MSG_ALLOC(vn, deleteextattr); 3105 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3106 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3107 sizeof(deleteextattr_msg->pvnr_attrname)); 3108 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3109 3110 puffs_msg_setinfo(park_deleteextattr, 3111 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3112 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3113 vp->v_data, NULL, error); 3114 3115 error = checkerr(pmp, error, __func__); 3116 3117 PUFFS_MSG_RELEASE(deleteextattr); 3118 return error; 3119 } 3120 3121 /* 3122 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3123 * FAF update information for the puffs node first. 3124 */ 3125 int 3126 puffs_vnop_spec_read(void *v) 3127 { 3128 struct vop_read_args /* { 3129 const struct vnodeop_desc *a_desc; 3130 struct vnode *a_vp; 3131 struct uio *a_uio; 3132 int a_ioflag; 3133 kauth_cred_t a_cred; 3134 } */ *ap = v; 3135 3136 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3137 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3138 } 3139 3140 int 3141 puffs_vnop_spec_write(void *v) 3142 { 3143 struct vop_write_args /* { 3144 const struct vnodeop_desc *a_desc; 3145 struct vnode *a_vp; 3146 struct uio *a_uio; 3147 int a_ioflag; 3148 kauth_cred_t a_cred; 3149 } */ *ap = v; 3150 3151 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3152 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3153 } 3154 3155 int 3156 puffs_vnop_fifo_read(void *v) 3157 { 3158 struct vop_read_args /* { 3159 const struct vnodeop_desc *a_desc; 3160 struct vnode *a_vp; 3161 struct uio *a_uio; 3162 int a_ioflag; 3163 kauth_cred_t a_cred; 3164 } */ *ap = v; 3165 3166 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3167 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3168 } 3169 3170 int 3171 puffs_vnop_fifo_write(void *v) 3172 { 3173 struct vop_write_args /* { 3174 const struct vnodeop_desc *a_desc; 3175 struct vnode *a_vp; 3176 struct uio *a_uio; 3177 int a_ioflag; 3178 kauth_cred_t a_cred; 3179 } */ *ap = v; 3180 3181 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3182 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3183 } 3184
Indexes created Wed Oct 01 15:09:59 GMT 2025