puffs_vnops.c revision 1.170
1 /* $NetBSD: puffs_vnops.c,v 1.170 2012/07/23 19:06:10 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 1.170 2012/07/23 19:06:10 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 cache_enter(dvp, NULL, cnp); 592 } 593 } 594 goto out; 595 } 596 597 /* 598 * Check that we don't get our parent node back, that would cause 599 * a pretty obvious deadlock. 600 */ 601 dpn = dvp->v_data; 602 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 603 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 604 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 605 error = EPROTO; 606 goto out; 607 } 608 609 /* 610 * Check if we looked up the cached vnode 611 */ 612 vp = NULL; 613 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 614 int grace; 615 616 /* 617 * Bump grace time of this node so that it does not get 618 * reclaimed too fast. We try to increase a bit more the 619 * lifetime of busiest * nodes - with some limits. 620 */ 621 grace = 10 * puffs_sopreq_expire_timeout; 622 cpn->pn_cn_grace = hardclock_ticks + grace; 623 vp = cvp; 624 } 625 626 /* 627 * No cached vnode available, or the cached vnode does not 628 * match the userland cookie anymore: is the node known? 629 */ 630 if (vp == NULL) { 631 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 632 1, 1, &vp); 633 } 634 635 if (error == PUFFS_NOSUCHCOOKIE) { 636 error = puffs_getvnode(dvp->v_mount, 637 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 638 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 639 if (error) { 640 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 641 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 642 ap->a_cnp); 643 goto out; 644 } 645 646 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 647 } else if (error) { 648 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 649 lookup_msg->pvnr_newnode, ap->a_cnp); 650 goto out; 651 } 652 653 /* 654 * Update cache and TTL 655 */ 656 if (PUFFS_USE_FS_TTL(pmp)) { 657 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 658 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 659 update_va(vp, NULL, &lookup_msg->pvnr_va, 660 va_ttl, cn_ttl, SETATTR_CHSIZE); 661 } 662 663 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 664 *ap->a_vpp = vp; 665 666 if (PUFFS_USE_NAMECACHE(pmp)) 667 cache_enter(dvp, vp, cnp); 668 669 /* XXX */ 670 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 671 cnp->cn_flags &= ~REQUIREDIR; 672 if (lookup_msg->pvnr_cn.pkcn_consume) 673 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 674 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 675 676 VPTOPP(vp)->pn_nlookup++; 677 out: 678 if (cvp != NULL) { 679 mutex_exit(&cpn->pn_sizemtx); 680 681 if (error || (cvp != vp)) 682 vput(cvp); 683 } 684 685 if (cnp->cn_flags & ISDOTDOT) 686 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 687 688 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 689 PUFFS_MSG_RELEASE(lookup); 690 return error; 691 } 692 693 #define REFPN_AND_UNLOCKVP(a, b) \ 694 do { \ 695 mutex_enter(&b->pn_mtx); \ 696 puffs_referencenode(b); \ 697 mutex_exit(&b->pn_mtx); \ 698 VOP_UNLOCK(a); \ 699 } while (/*CONSTCOND*/0) 700 701 #define REFPN(b) \ 702 do { \ 703 mutex_enter(&b->pn_mtx); \ 704 puffs_referencenode(b); \ 705 mutex_exit(&b->pn_mtx); \ 706 } while (/*CONSTCOND*/0) 707 708 #define RELEPN_AND_VP(a, b) \ 709 do { \ 710 puffs_releasenode(b); \ 711 vrele(a); \ 712 } while (/*CONSTCOND*/0) 713 714 int 715 puffs_vnop_create(void *v) 716 { 717 struct vop_create_args /* { 718 const struct vnodeop_desc *a_desc; 719 struct vnode *a_dvp; 720 struct vnode **a_vpp; 721 struct componentname *a_cnp; 722 struct vattr *a_vap; 723 } */ *ap = v; 724 PUFFS_MSG_VARS(vn, create); 725 struct vnode *dvp = ap->a_dvp; 726 struct puffs_node *dpn = VPTOPP(dvp); 727 struct componentname *cnp = ap->a_cnp; 728 struct mount *mp = dvp->v_mount; 729 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 730 int error; 731 732 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 733 dvp, ap->a_cnp->cn_nameptr)); 734 735 PUFFS_MSG_ALLOC(vn, create); 736 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 737 cnp, PUFFS_USE_FULLPNBUF(pmp)); 738 create_msg->pvnr_va = *ap->a_vap; 739 puffs_msg_setinfo(park_create, PUFFSOP_VN, 740 PUFFS_VN_CREATE, VPTOPNC(dvp)); 741 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 742 743 error = checkerr(pmp, error, __func__); 744 if (error) 745 goto out; 746 747 error = puffs_newnode(mp, dvp, ap->a_vpp, 748 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 749 if (error) { 750 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 751 create_msg->pvnr_newnode, cnp); 752 goto out; 753 } 754 755 if (PUFFS_USE_FS_TTL(pmp)) { 756 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 757 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 758 struct vattr *rvap = &create_msg->pvnr_va; 759 760 update_va(*ap->a_vpp, NULL, rvap, 761 va_ttl, cn_ttl, SETATTR_CHSIZE); 762 } 763 764 out: 765 vput(dvp); 766 767 DPRINTF(("puffs_create: return %d\n", error)); 768 PUFFS_MSG_RELEASE(create); 769 return error; 770 } 771 772 int 773 puffs_vnop_mknod(void *v) 774 { 775 struct vop_mknod_args /* { 776 const struct vnodeop_desc *a_desc; 777 struct vnode *a_dvp; 778 struct vnode **a_vpp; 779 struct componentname *a_cnp; 780 struct vattr *a_vap; 781 } */ *ap = v; 782 PUFFS_MSG_VARS(vn, mknod); 783 struct vnode *dvp = ap->a_dvp; 784 struct puffs_node *dpn = VPTOPP(dvp); 785 struct componentname *cnp = ap->a_cnp; 786 struct mount *mp = dvp->v_mount; 787 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 788 int error; 789 790 PUFFS_MSG_ALLOC(vn, mknod); 791 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 792 cnp, PUFFS_USE_FULLPNBUF(pmp)); 793 mknod_msg->pvnr_va = *ap->a_vap; 794 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 795 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 796 797 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 798 799 error = checkerr(pmp, error, __func__); 800 if (error) 801 goto out; 802 803 error = puffs_newnode(mp, dvp, ap->a_vpp, 804 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 805 ap->a_vap->va_rdev); 806 if (error) { 807 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 808 mknod_msg->pvnr_newnode, cnp); 809 goto out; 810 } 811 812 if (PUFFS_USE_FS_TTL(pmp)) { 813 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 814 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 815 struct vattr *rvap = &mknod_msg->pvnr_va; 816 817 update_va(*ap->a_vpp, NULL, rvap, 818 va_ttl, cn_ttl, SETATTR_CHSIZE); 819 } 820 821 out: 822 vput(dvp); 823 PUFFS_MSG_RELEASE(mknod); 824 return error; 825 } 826 827 int 828 puffs_vnop_open(void *v) 829 { 830 struct vop_open_args /* { 831 const struct vnodeop_desc *a_desc; 832 struct vnode *a_vp; 833 int a_mode; 834 kauth_cred_t a_cred; 835 } */ *ap = v; 836 PUFFS_MSG_VARS(vn, open); 837 struct vnode *vp = ap->a_vp; 838 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 839 int mode = ap->a_mode; 840 int error; 841 842 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 843 844 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 845 ERROUT(EROFS); 846 847 if (!EXISTSOP(pmp, OPEN)) 848 ERROUT(0); 849 850 PUFFS_MSG_ALLOC(vn, open); 851 open_msg->pvnr_mode = mode; 852 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 853 puffs_msg_setinfo(park_open, PUFFSOP_VN, 854 PUFFS_VN_OPEN, VPTOPNC(vp)); 855 856 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 857 error = checkerr(pmp, error, __func__); 858 859 out: 860 DPRINTF(("puffs_open: returning %d\n", error)); 861 PUFFS_MSG_RELEASE(open); 862 return error; 863 } 864 865 int 866 puffs_vnop_close(void *v) 867 { 868 struct vop_close_args /* { 869 const struct vnodeop_desc *a_desc; 870 struct vnode *a_vp; 871 int a_fflag; 872 kauth_cred_t a_cred; 873 } */ *ap = v; 874 PUFFS_MSG_VARS(vn, close); 875 struct vnode *vp = ap->a_vp; 876 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 877 878 PUFFS_MSG_ALLOC(vn, close); 879 puffs_msg_setfaf(park_close); 880 close_msg->pvnr_fflag = ap->a_fflag; 881 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 882 puffs_msg_setinfo(park_close, PUFFSOP_VN, 883 PUFFS_VN_CLOSE, VPTOPNC(vp)); 884 885 puffs_msg_enqueue(pmp, park_close); 886 PUFFS_MSG_RELEASE(close); 887 return 0; 888 } 889 890 int 891 puffs_vnop_access(void *v) 892 { 893 struct vop_access_args /* { 894 const struct vnodeop_desc *a_desc; 895 struct vnode *a_vp; 896 int a_mode; 897 kauth_cred_t a_cred; 898 } */ *ap = v; 899 PUFFS_MSG_VARS(vn, access); 900 struct vnode *vp = ap->a_vp; 901 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 902 int mode = ap->a_mode; 903 int error; 904 905 if (mode & VWRITE) { 906 switch (vp->v_type) { 907 case VDIR: 908 case VLNK: 909 case VREG: 910 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 911 || !EXISTSOP(pmp, WRITE)) 912 return EROFS; 913 break; 914 default: 915 break; 916 } 917 } 918 919 if (!EXISTSOP(pmp, ACCESS)) 920 return 0; 921 922 PUFFS_MSG_ALLOC(vn, access); 923 access_msg->pvnr_mode = ap->a_mode; 924 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 925 puffs_msg_setinfo(park_access, PUFFSOP_VN, 926 PUFFS_VN_ACCESS, VPTOPNC(vp)); 927 928 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 929 error = checkerr(pmp, error, __func__); 930 PUFFS_MSG_RELEASE(access); 931 932 return error; 933 } 934 935 static void 936 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 937 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 938 { 939 struct puffs_node *pn = VPTOPP(vp); 940 941 if (TTL_VALID(cn_ttl)) { 942 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 943 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 944 } 945 946 /* 947 * Don't listen to the file server regarding special device 948 * size info, the file server doesn't know anything about them. 949 */ 950 if (vp->v_type == VBLK || vp->v_type == VCHR) 951 rvap->va_size = vp->v_size; 952 953 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 954 if (vp->v_type == VBLK) 955 rvap->va_blocksize = BLKDEV_IOSIZE; 956 else if (vp->v_type == VCHR) 957 rvap->va_blocksize = MAXBSIZE; 958 959 if (vap != NULL) { 960 (void) memcpy(vap, rvap, sizeof(struct vattr)); 961 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 962 963 if (pn->pn_stat & PNODE_METACACHE_ATIME) 964 vap->va_atime = pn->pn_mc_atime; 965 if (pn->pn_stat & PNODE_METACACHE_CTIME) 966 vap->va_ctime = pn->pn_mc_ctime; 967 if (pn->pn_stat & PNODE_METACACHE_MTIME) 968 vap->va_mtime = pn->pn_mc_mtime; 969 if (pn->pn_stat & PNODE_METACACHE_SIZE) 970 vap->va_size = pn->pn_mc_size; 971 } 972 973 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 974 if (rvap->va_size != VNOVAL 975 && vp->v_type != VBLK && vp->v_type != VCHR) { 976 uvm_vnp_setsize(vp, rvap->va_size); 977 pn->pn_serversize = rvap->va_size; 978 } 979 } 980 981 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 982 if (pn->pn_va_cache == NULL) 983 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 984 985 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 986 987 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 988 } 989 } 990 991 int 992 puffs_vnop_getattr(void *v) 993 { 994 struct vop_getattr_args /* { 995 const struct vnodeop_desc *a_desc; 996 struct vnode *a_vp; 997 struct vattr *a_vap; 998 kauth_cred_t a_cred; 999 } */ *ap = v; 1000 PUFFS_MSG_VARS(vn, getattr); 1001 struct vnode *vp = ap->a_vp; 1002 struct mount *mp = vp->v_mount; 1003 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1004 struct vattr *vap, *rvap; 1005 struct puffs_node *pn = VPTOPP(vp); 1006 struct timespec *va_ttl = NULL; 1007 int error = 0; 1008 1009 /* 1010 * A lock is required so that we do not race with 1011 * setattr, write and fsync when changing vp->v_size. 1012 * This is critical, since setting a stall smaler value 1013 * triggers a file truncate in uvm_vnp_setsize(), which 1014 * most of the time means data corruption (a chunk of 1015 * data is replaced by zeroes). This can be removed if 1016 * we decide one day that VOP_GETATTR must operate on 1017 * a locked vnode. 1018 * 1019 * XXX Should be useless now that VOP_GETATTR has been 1020 * fixed to always require a shared lock at least. 1021 */ 1022 mutex_enter(&pn->pn_sizemtx); 1023 1024 REFPN(pn); 1025 vap = ap->a_vap; 1026 1027 if (PUFFS_USE_FS_TTL(pmp)) { 1028 if (!TIMED_OUT(pn->pn_va_timeout)) { 1029 update_va(vp, vap, pn->pn_va_cache, 1030 NULL, NULL, SETATTR_CHSIZE); 1031 goto out2; 1032 } 1033 } 1034 1035 PUFFS_MSG_ALLOC(vn, getattr); 1036 vattr_null(&getattr_msg->pvnr_va); 1037 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1038 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1039 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1040 1041 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1042 error = checkerr(pmp, error, __func__); 1043 if (error) 1044 goto out; 1045 1046 rvap = &getattr_msg->pvnr_va; 1047 1048 if (PUFFS_USE_FS_TTL(pmp)) 1049 va_ttl = &getattr_msg->pvnr_va_ttl; 1050 1051 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1052 1053 out: 1054 PUFFS_MSG_RELEASE(getattr); 1055 1056 out2: 1057 puffs_releasenode(pn); 1058 1059 mutex_exit(&pn->pn_sizemtx); 1060 1061 return error; 1062 } 1063 1064 static int 1065 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1066 { 1067 PUFFS_MSG_VARS(vn, setattr); 1068 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1069 struct puffs_node *pn = vp->v_data; 1070 int error = 0; 1071 1072 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1073 1074 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1075 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1076 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1077 || vap->va_mode != (mode_t)VNOVAL)) 1078 return EROFS; 1079 1080 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1081 && vp->v_type == VREG && vap->va_size != VNOVAL) 1082 return EROFS; 1083 1084 /* 1085 * Flush metacache first. If we are called with some explicit 1086 * parameters, treat them as information overriding metacache 1087 * information. 1088 */ 1089 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1090 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1091 && vap->va_atime.tv_sec == VNOVAL) 1092 vap->va_atime = pn->pn_mc_atime; 1093 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1094 && vap->va_ctime.tv_sec == VNOVAL) 1095 vap->va_ctime = pn->pn_mc_ctime; 1096 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1097 && vap->va_mtime.tv_sec == VNOVAL) 1098 vap->va_mtime = pn->pn_mc_mtime; 1099 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1100 && vap->va_size == VNOVAL) 1101 vap->va_size = pn->pn_mc_size; 1102 1103 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1104 } 1105 1106 /* 1107 * Flush attribute cache so that another thread do 1108 * not get a stale value during the operation. 1109 */ 1110 if (PUFFS_USE_FS_TTL(pmp)) 1111 pn->pn_va_timeout = 0; 1112 1113 PUFFS_MSG_ALLOC(vn, setattr); 1114 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1115 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1116 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1117 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1118 if (flags & SETATTR_ASYNC) 1119 puffs_msg_setfaf(park_setattr); 1120 1121 puffs_msg_enqueue(pmp, park_setattr); 1122 if ((flags & SETATTR_ASYNC) == 0) 1123 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1124 1125 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1126 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1127 struct vattr *rvap = &setattr_msg->pvnr_va; 1128 1129 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1130 } 1131 1132 PUFFS_MSG_RELEASE(setattr); 1133 if ((flags & SETATTR_ASYNC) == 0) { 1134 error = checkerr(pmp, error, __func__); 1135 if (error) 1136 return error; 1137 } else { 1138 error = 0; 1139 } 1140 1141 if (vap->va_size != VNOVAL) { 1142 pn->pn_serversize = vap->va_size; 1143 if (flags & SETATTR_CHSIZE) 1144 uvm_vnp_setsize(vp, vap->va_size); 1145 } 1146 1147 return 0; 1148 } 1149 1150 int 1151 puffs_vnop_setattr(void *v) 1152 { 1153 struct vop_getattr_args /* { 1154 const struct vnodeop_desc *a_desc; 1155 struct vnode *a_vp; 1156 struct vattr *a_vap; 1157 kauth_cred_t a_cred; 1158 } */ *ap = v; 1159 struct puffs_node *pn = ap->a_vp->v_data; 1160 int error; 1161 1162 mutex_enter(&pn->pn_sizemtx); 1163 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1164 mutex_exit(&pn->pn_sizemtx); 1165 1166 return error; 1167 } 1168 1169 static __inline int 1170 doinact(struct puffs_mount *pmp, int iaflag) 1171 { 1172 1173 if (EXISTSOP(pmp, INACTIVE)) 1174 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1175 if (iaflag || ALLOPS(pmp)) 1176 return 1; 1177 else 1178 return 0; 1179 else 1180 return 1; 1181 else 1182 return 0; 1183 } 1184 1185 static void 1186 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1187 { 1188 int error; 1189 PUFFS_MSG_VARS(vn, inactive); 1190 1191 if (doinact(pmp, iaflag)) { 1192 PUFFS_MSG_ALLOC(vn, inactive); 1193 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1194 PUFFS_VN_INACTIVE, ck); 1195 1196 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1197 PUFFS_MSG_RELEASE(inactive); 1198 } 1199 } 1200 1201 /* XXX: callinactive can't setback */ 1202 int 1203 puffs_vnop_inactive(void *v) 1204 { 1205 struct vop_inactive_args /* { 1206 const struct vnodeop_desc *a_desc; 1207 struct vnode *a_vp; 1208 } */ *ap = v; 1209 PUFFS_MSG_VARS(vn, inactive); 1210 struct vnode *vp = ap->a_vp; 1211 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1212 struct puffs_node *pnode; 1213 bool recycle = false; 1214 int error; 1215 1216 pnode = vp->v_data; 1217 mutex_enter(&pnode->pn_sizemtx); 1218 1219 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1220 flushvncache(vp, 0, 0, false); 1221 PUFFS_MSG_ALLOC(vn, inactive); 1222 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1223 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1224 1225 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1226 NULL, error); 1227 PUFFS_MSG_RELEASE(inactive); 1228 } 1229 pnode->pn_stat &= ~PNODE_DOINACT; 1230 1231 /* 1232 * file server thinks it's gone? then don't be afraid care, 1233 * node's life was already all it would ever be 1234 */ 1235 if (pnode->pn_stat & PNODE_NOREFS) { 1236 pnode->pn_stat |= PNODE_DYING; 1237 recycle = true; 1238 } 1239 1240 /* 1241 * Handle node TTL. 1242 * If grace has already timed out, make it reclaimed. 1243 * Otherwise, we queue its expiration by sop thread, so 1244 * that it does not remain for ages in the freelist, 1245 * holding memory in userspace, while we will have 1246 * to look it up again anyway. 1247 */ 1248 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1249 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1250 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1251 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1252 1253 if (!incache && !ingrace && !reclaimqueued) { 1254 pnode->pn_stat |= PNODE_DYING; 1255 recycle = true; 1256 } 1257 1258 if (!recycle && !reclaimqueued) { 1259 struct puffs_sopreq *psopr; 1260 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1261 1262 KASSERT(curlwp != uvm.pagedaemon_lwp); 1263 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1264 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1265 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1266 psopr->psopr_at = at; 1267 1268 mutex_enter(&pmp->pmp_sopmtx); 1269 1270 /* 1271 * If thread has disapeared, just give up. The 1272 * fs is being unmounted and the node will be 1273 * be reclaimed anyway. 1274 * 1275 * Otherwise, we queue the request but do not 1276 * immediatly signal the thread, as the node 1277 * has not been expired yet. 1278 */ 1279 if (pmp->pmp_sopthrcount == 0) { 1280 kmem_free(psopr, sizeof(*psopr)); 1281 } else { 1282 TAILQ_INSERT_TAIL(&pmp->pmp_sopslowreqs, 1283 psopr, psopr_entries); 1284 pnode->pn_stat |= PNODE_SOPEXP; 1285 } 1286 1287 mutex_exit(&pmp->pmp_sopmtx); 1288 } 1289 } 1290 1291 *ap->a_recycle = recycle; 1292 1293 mutex_exit(&pnode->pn_sizemtx); 1294 VOP_UNLOCK(vp); 1295 1296 return 0; 1297 } 1298 1299 static void 1300 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1301 { 1302 PUFFS_MSG_VARS(vn, reclaim); 1303 1304 if (!EXISTSOP(pmp, RECLAIM)) 1305 return; 1306 1307 PUFFS_MSG_ALLOC(vn, reclaim); 1308 reclaim_msg->pvnr_nlookup = nlookup; 1309 puffs_msg_setfaf(park_reclaim); 1310 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1311 1312 puffs_msg_enqueue(pmp, park_reclaim); 1313 PUFFS_MSG_RELEASE(reclaim); 1314 return; 1315 } 1316 1317 /* 1318 * always FAF, we don't really care if the server wants to fail to 1319 * reclaim the node or not 1320 */ 1321 int 1322 puffs_vnop_reclaim(void *v) 1323 { 1324 struct vop_reclaim_args /* { 1325 const struct vnodeop_desc *a_desc; 1326 struct vnode *a_vp; 1327 } */ *ap = v; 1328 struct vnode *vp = ap->a_vp; 1329 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1330 struct puffs_node *pnode = vp->v_data; 1331 bool notifyserver = true; 1332 1333 /* 1334 * first things first: check if someone is trying to reclaim the 1335 * root vnode. do not allow that to travel to userspace. 1336 * Note that we don't need to take the lock similarly to 1337 * puffs_root(), since there is only one of us. 1338 */ 1339 if (vp->v_vflag & VV_ROOT) { 1340 mutex_enter(&pmp->pmp_lock); 1341 KASSERT(pmp->pmp_root != NULL); 1342 pmp->pmp_root = NULL; 1343 mutex_exit(&pmp->pmp_lock); 1344 notifyserver = false; 1345 } 1346 1347 /* 1348 * purge info from kernel before issueing FAF, since we 1349 * don't really know when we'll get around to it after 1350 * that and someone might race us into node creation 1351 */ 1352 mutex_enter(&pmp->pmp_lock); 1353 LIST_REMOVE(pnode, pn_hashent); 1354 if (PUFFS_USE_NAMECACHE(pmp)) 1355 cache_purge(vp); 1356 mutex_exit(&pmp->pmp_lock); 1357 1358 if (notifyserver) { 1359 int nlookup = VPTOPP(vp)->pn_nlookup; 1360 1361 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1362 } 1363 1364 puffs_putvnode(vp); 1365 vp->v_data = NULL; 1366 1367 return 0; 1368 } 1369 1370 #define CSIZE sizeof(**ap->a_cookies) 1371 int 1372 puffs_vnop_readdir(void *v) 1373 { 1374 struct vop_readdir_args /* { 1375 const struct vnodeop_desc *a_desc; 1376 struct vnode *a_vp; 1377 struct uio *a_uio; 1378 kauth_cred_t a_cred; 1379 int *a_eofflag; 1380 off_t **a_cookies; 1381 int *a_ncookies; 1382 } */ *ap = v; 1383 PUFFS_MSG_VARS(vn, readdir); 1384 struct vnode *vp = ap->a_vp; 1385 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1386 size_t argsize, tomove, cookiemem, cookiesmax; 1387 struct uio *uio = ap->a_uio; 1388 size_t howmuch, resid; 1389 int error; 1390 1391 /* 1392 * ok, so we need: resid + cookiemem = maxreq 1393 * => resid + cookiesize * (resid/minsize) = maxreq 1394 * => resid + cookiesize/minsize * resid = maxreq 1395 * => (cookiesize/minsize + 1) * resid = maxreq 1396 * => resid = maxreq / (cookiesize/minsize + 1) 1397 * 1398 * Since cookiesize <= minsize and we're not very big on floats, 1399 * we approximate that to be 1. Therefore: 1400 * 1401 * resid = maxreq / 2; 1402 * 1403 * Well, at least we didn't have to use differential equations 1404 * or the Gram-Schmidt process. 1405 * 1406 * (yes, I'm very afraid of this) 1407 */ 1408 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1409 1410 if (ap->a_cookies) { 1411 KASSERT(ap->a_ncookies != NULL); 1412 if (pmp->pmp_args.pa_fhsize == 0) 1413 return EOPNOTSUPP; 1414 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1415 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1416 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1417 } else { 1418 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1419 cookiesmax = 0; 1420 cookiemem = 0; 1421 } 1422 1423 argsize = sizeof(struct puffs_vnmsg_readdir); 1424 tomove = resid + cookiemem; 1425 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1426 (void *)&readdir_msg, 1); 1427 1428 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1429 readdir_msg->pvnr_offset = uio->uio_offset; 1430 readdir_msg->pvnr_resid = resid; 1431 readdir_msg->pvnr_ncookies = cookiesmax; 1432 readdir_msg->pvnr_eofflag = 0; 1433 readdir_msg->pvnr_dentoff = cookiemem; 1434 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1435 PUFFS_VN_READDIR, VPTOPNC(vp)); 1436 puffs_msg_setdelta(park_readdir, tomove); 1437 1438 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1439 error = checkerr(pmp, error, __func__); 1440 if (error) 1441 goto out; 1442 1443 /* userspace is cheating? */ 1444 if (readdir_msg->pvnr_resid > resid) { 1445 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1446 "resid grew", VPTOPNC(vp)); 1447 ERROUT(EPROTO); 1448 } 1449 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1450 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1451 "too many cookies", VPTOPNC(vp)); 1452 ERROUT(EPROTO); 1453 } 1454 1455 /* check eof */ 1456 if (readdir_msg->pvnr_eofflag) 1457 *ap->a_eofflag = 1; 1458 1459 /* bouncy-wouncy with the directory data */ 1460 howmuch = resid - readdir_msg->pvnr_resid; 1461 1462 /* force eof if no data was returned (getcwd() needs this) */ 1463 if (howmuch == 0) { 1464 *ap->a_eofflag = 1; 1465 goto out; 1466 } 1467 1468 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1469 if (error) 1470 goto out; 1471 1472 /* provide cookies to caller if so desired */ 1473 if (ap->a_cookies) { 1474 KASSERT(curlwp != uvm.pagedaemon_lwp); 1475 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1476 M_TEMP, M_WAITOK); 1477 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1478 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1479 *ap->a_ncookies*CSIZE); 1480 } 1481 1482 /* next readdir starts here */ 1483 uio->uio_offset = readdir_msg->pvnr_offset; 1484 1485 out: 1486 puffs_msgmem_release(park_readdir); 1487 return error; 1488 } 1489 #undef CSIZE 1490 1491 /* 1492 * poll works by consuming the bitmask in pn_revents. If there are 1493 * events available, poll returns immediately. If not, it issues a 1494 * poll to userspace, selrecords itself and returns with no available 1495 * events. When the file server returns, it executes puffs_parkdone_poll(), 1496 * where available events are added to the bitmask. selnotify() is 1497 * then also executed by that function causing us to enter here again 1498 * and hopefully find the missing bits (unless someone got them first, 1499 * in which case it starts all over again). 1500 */ 1501 int 1502 puffs_vnop_poll(void *v) 1503 { 1504 struct vop_poll_args /* { 1505 const struct vnodeop_desc *a_desc; 1506 struct vnode *a_vp; 1507 int a_events; 1508 } */ *ap = v; 1509 PUFFS_MSG_VARS(vn, poll); 1510 struct vnode *vp = ap->a_vp; 1511 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1512 struct puffs_node *pn = vp->v_data; 1513 int events, error; 1514 1515 if (EXISTSOP(pmp, POLL)) { 1516 mutex_enter(&pn->pn_mtx); 1517 events = pn->pn_revents & ap->a_events; 1518 if (events & ap->a_events) { 1519 pn->pn_revents &= ~ap->a_events; 1520 mutex_exit(&pn->pn_mtx); 1521 1522 return events; 1523 } else { 1524 puffs_referencenode(pn); 1525 mutex_exit(&pn->pn_mtx); 1526 1527 PUFFS_MSG_ALLOC(vn, poll); 1528 poll_msg->pvnr_events = ap->a_events; 1529 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1530 PUFFS_VN_POLL, VPTOPNC(vp)); 1531 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1532 selrecord(curlwp, &pn->pn_sel); 1533 1534 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1535 NULL, error); 1536 PUFFS_MSG_RELEASE(poll); 1537 1538 return 0; 1539 } 1540 } else { 1541 return genfs_poll(v); 1542 } 1543 } 1544 1545 static int 1546 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1547 { 1548 struct puffs_node *pn = VPTOPP(vp); 1549 struct vattr va; 1550 int pflags, error; 1551 1552 /* flush out information from our metacache, see vop_setattr */ 1553 if (pn->pn_stat & PNODE_METACACHE_MASK 1554 && (pn->pn_stat & PNODE_DYING) == 0) { 1555 vattr_null(&va); 1556 error = dosetattr(vp, &va, FSCRED, 1557 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1558 if (error) 1559 return error; 1560 } 1561 1562 /* 1563 * flush pages to avoid being overly dirty 1564 */ 1565 pflags = PGO_CLEANIT; 1566 if (wait) 1567 pflags |= PGO_SYNCIO; 1568 1569 mutex_enter(vp->v_interlock); 1570 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1571 } 1572 1573 int 1574 puffs_vnop_fsync(void *v) 1575 { 1576 struct vop_fsync_args /* { 1577 const struct vnodeop_desc *a_desc; 1578 struct vnode *a_vp; 1579 kauth_cred_t a_cred; 1580 int a_flags; 1581 off_t a_offlo; 1582 off_t a_offhi; 1583 } */ *ap = v; 1584 PUFFS_MSG_VARS(vn, fsync); 1585 struct vnode *vp; 1586 struct puffs_node *pn; 1587 struct puffs_mount *pmp; 1588 int error, dofaf; 1589 1590 vp = ap->a_vp; 1591 KASSERT(vp != NULL); 1592 pn = VPTOPP(vp); 1593 KASSERT(pn != NULL); 1594 pmp = MPTOPUFFSMP(vp->v_mount); 1595 if (ap->a_flags & FSYNC_WAIT) { 1596 mutex_enter(&pn->pn_sizemtx); 1597 } else { 1598 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1599 return EDEADLK; 1600 } 1601 1602 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1603 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1604 if (error) 1605 goto out; 1606 1607 /* 1608 * HELLO! We exit already here if the user server does not 1609 * support fsync OR if we should call fsync for a node which 1610 * has references neither in the kernel or the fs server. 1611 * Otherwise we continue to issue fsync() forward. 1612 */ 1613 error = 0; 1614 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1615 goto out; 1616 1617 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1618 /* 1619 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1620 * only FAFs for those. Otherwise there's a danger of deadlock, 1621 * since the execution context here might be the user server 1622 * doing some operation on another fs, which in turn caused a 1623 * vnode to be reclaimed from the freelist for this fs. 1624 */ 1625 if (dofaf == 0) { 1626 mutex_enter(vp->v_interlock); 1627 if (vp->v_iflag & VI_XLOCK) 1628 dofaf = 1; 1629 mutex_exit(vp->v_interlock); 1630 } 1631 1632 PUFFS_MSG_ALLOC(vn, fsync); 1633 if (dofaf) 1634 puffs_msg_setfaf(park_fsync); 1635 1636 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1637 fsync_msg->pvnr_flags = ap->a_flags; 1638 fsync_msg->pvnr_offlo = ap->a_offlo; 1639 fsync_msg->pvnr_offhi = ap->a_offhi; 1640 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1641 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1642 1643 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1644 PUFFS_MSG_RELEASE(fsync); 1645 1646 error = checkerr(pmp, error, __func__); 1647 1648 out: 1649 mutex_exit(&pn->pn_sizemtx); 1650 return error; 1651 } 1652 1653 int 1654 puffs_vnop_seek(void *v) 1655 { 1656 struct vop_seek_args /* { 1657 const struct vnodeop_desc *a_desc; 1658 struct vnode *a_vp; 1659 off_t a_oldoff; 1660 off_t a_newoff; 1661 kauth_cred_t a_cred; 1662 } */ *ap = v; 1663 PUFFS_MSG_VARS(vn, seek); 1664 struct vnode *vp = ap->a_vp; 1665 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1666 int error; 1667 1668 PUFFS_MSG_ALLOC(vn, seek); 1669 seek_msg->pvnr_oldoff = ap->a_oldoff; 1670 seek_msg->pvnr_newoff = ap->a_newoff; 1671 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1672 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1673 PUFFS_VN_SEEK, VPTOPNC(vp)); 1674 1675 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1676 PUFFS_MSG_RELEASE(seek); 1677 return checkerr(pmp, error, __func__); 1678 } 1679 1680 static int 1681 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1682 struct componentname *cnp) 1683 { 1684 PUFFS_MSG_VARS(vn, remove); 1685 int error; 1686 1687 PUFFS_MSG_ALLOC(vn, remove); 1688 remove_msg->pvnr_cookie_targ = ck; 1689 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1690 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1691 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1692 1693 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1694 PUFFS_MSG_RELEASE(remove); 1695 1696 return checkerr(pmp, error, __func__); 1697 } 1698 1699 /* 1700 * XXX: can't use callremove now because can't catch setbacks with 1701 * it due to lack of a pnode argument. 1702 */ 1703 int 1704 puffs_vnop_remove(void *v) 1705 { 1706 struct vop_remove_args /* { 1707 const struct vnodeop_desc *a_desc; 1708 struct vnode *a_dvp; 1709 struct vnode *a_vp; 1710 struct componentname *a_cnp; 1711 } */ *ap = v; 1712 PUFFS_MSG_VARS(vn, remove); 1713 struct vnode *dvp = ap->a_dvp; 1714 struct vnode *vp = ap->a_vp; 1715 struct puffs_node *dpn = VPTOPP(dvp); 1716 struct puffs_node *pn = VPTOPP(vp); 1717 struct componentname *cnp = ap->a_cnp; 1718 struct mount *mp = dvp->v_mount; 1719 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1720 int error; 1721 1722 PUFFS_MSG_ALLOC(vn, remove); 1723 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1724 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1725 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1726 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1727 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1728 1729 puffs_msg_enqueue(pmp, park_remove); 1730 REFPN_AND_UNLOCKVP(dvp, dpn); 1731 if (dvp == vp) 1732 REFPN(pn); 1733 else 1734 REFPN_AND_UNLOCKVP(vp, pn); 1735 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1736 1737 PUFFS_MSG_RELEASE(remove); 1738 1739 RELEPN_AND_VP(dvp, dpn); 1740 RELEPN_AND_VP(vp, pn); 1741 1742 error = checkerr(pmp, error, __func__); 1743 return error; 1744 } 1745 1746 int 1747 puffs_vnop_mkdir(void *v) 1748 { 1749 struct vop_mkdir_args /* { 1750 const struct vnodeop_desc *a_desc; 1751 struct vnode *a_dvp; 1752 struct vnode **a_vpp; 1753 struct componentname *a_cnp; 1754 struct vattr *a_vap; 1755 } */ *ap = v; 1756 PUFFS_MSG_VARS(vn, mkdir); 1757 struct vnode *dvp = ap->a_dvp; 1758 struct puffs_node *dpn = VPTOPP(dvp); 1759 struct componentname *cnp = ap->a_cnp; 1760 struct mount *mp = dvp->v_mount; 1761 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1762 int error; 1763 1764 PUFFS_MSG_ALLOC(vn, mkdir); 1765 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1766 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1767 mkdir_msg->pvnr_va = *ap->a_vap; 1768 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1769 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1770 1771 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1772 1773 error = checkerr(pmp, error, __func__); 1774 if (error) 1775 goto out; 1776 1777 error = puffs_newnode(mp, dvp, ap->a_vpp, 1778 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1779 if (error) { 1780 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1781 mkdir_msg->pvnr_newnode, cnp); 1782 goto out; 1783 } 1784 1785 if (PUFFS_USE_FS_TTL(pmp)) { 1786 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1787 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1788 struct vattr *rvap = &mkdir_msg->pvnr_va; 1789 1790 update_va(*ap->a_vpp, NULL, rvap, 1791 va_ttl, cn_ttl, SETATTR_CHSIZE); 1792 } 1793 1794 out: 1795 vput(dvp); 1796 PUFFS_MSG_RELEASE(mkdir); 1797 return error; 1798 } 1799 1800 static int 1801 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1802 struct componentname *cnp) 1803 { 1804 PUFFS_MSG_VARS(vn, rmdir); 1805 int error; 1806 1807 PUFFS_MSG_ALLOC(vn, rmdir); 1808 rmdir_msg->pvnr_cookie_targ = ck; 1809 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1810 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1811 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1812 1813 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1814 PUFFS_MSG_RELEASE(rmdir); 1815 1816 return checkerr(pmp, error, __func__); 1817 } 1818 1819 int 1820 puffs_vnop_rmdir(void *v) 1821 { 1822 struct vop_rmdir_args /* { 1823 const struct vnodeop_desc *a_desc; 1824 struct vnode *a_dvp; 1825 struct vnode *a_vp; 1826 struct componentname *a_cnp; 1827 } */ *ap = v; 1828 PUFFS_MSG_VARS(vn, rmdir); 1829 struct vnode *dvp = ap->a_dvp; 1830 struct vnode *vp = ap->a_vp; 1831 struct puffs_node *dpn = VPTOPP(dvp); 1832 struct puffs_node *pn = VPTOPP(vp); 1833 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1834 struct componentname *cnp = ap->a_cnp; 1835 int error; 1836 1837 PUFFS_MSG_ALLOC(vn, rmdir); 1838 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1839 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1840 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1841 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1842 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1843 1844 puffs_msg_enqueue(pmp, park_rmdir); 1845 REFPN_AND_UNLOCKVP(dvp, dpn); 1846 REFPN_AND_UNLOCKVP(vp, pn); 1847 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1848 1849 PUFFS_MSG_RELEASE(rmdir); 1850 1851 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1852 RELEPN_AND_VP(dvp, dpn); 1853 RELEPN_AND_VP(vp, pn); 1854 1855 return error; 1856 } 1857 1858 int 1859 puffs_vnop_link(void *v) 1860 { 1861 struct vop_link_args /* { 1862 const struct vnodeop_desc *a_desc; 1863 struct vnode *a_dvp; 1864 struct vnode *a_vp; 1865 struct componentname *a_cnp; 1866 } */ *ap = v; 1867 PUFFS_MSG_VARS(vn, link); 1868 struct vnode *dvp = ap->a_dvp; 1869 struct vnode *vp = ap->a_vp; 1870 struct puffs_node *dpn = VPTOPP(dvp); 1871 struct puffs_node *pn = VPTOPP(vp); 1872 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1873 struct componentname *cnp = ap->a_cnp; 1874 int error; 1875 1876 PUFFS_MSG_ALLOC(vn, link); 1877 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1878 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1879 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1880 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1881 PUFFS_VN_LINK, VPTOPNC(dvp)); 1882 1883 puffs_msg_enqueue(pmp, park_link); 1884 REFPN_AND_UNLOCKVP(dvp, dpn); 1885 REFPN(pn); 1886 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1887 1888 PUFFS_MSG_RELEASE(link); 1889 1890 error = checkerr(pmp, error, __func__); 1891 1892 /* 1893 * XXX: stay in touch with the cache. I don't like this, but 1894 * don't have a better solution either. See also puffs_rename(). 1895 */ 1896 if (error == 0) 1897 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1898 1899 RELEPN_AND_VP(dvp, dpn); 1900 puffs_releasenode(pn); 1901 1902 return error; 1903 } 1904 1905 int 1906 puffs_vnop_symlink(void *v) 1907 { 1908 struct vop_symlink_args /* { 1909 const struct vnodeop_desc *a_desc; 1910 struct vnode *a_dvp; 1911 struct vnode **a_vpp; 1912 struct componentname *a_cnp; 1913 struct vattr *a_vap; 1914 char *a_target; 1915 } */ *ap = v; 1916 PUFFS_MSG_VARS(vn, symlink); 1917 struct vnode *dvp = ap->a_dvp; 1918 struct puffs_node *dpn = VPTOPP(dvp); 1919 struct mount *mp = dvp->v_mount; 1920 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1921 struct componentname *cnp = ap->a_cnp; 1922 int error; 1923 1924 *ap->a_vpp = NULL; 1925 1926 PUFFS_MSG_ALLOC(vn, symlink); 1927 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1928 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1929 symlink_msg->pvnr_va = *ap->a_vap; 1930 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1931 sizeof(symlink_msg->pvnr_link)); 1932 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1933 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1934 1935 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1936 1937 error = checkerr(pmp, error, __func__); 1938 if (error) 1939 goto out; 1940 1941 error = puffs_newnode(mp, dvp, ap->a_vpp, 1942 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1943 if (error) { 1944 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1945 symlink_msg->pvnr_newnode, cnp); 1946 goto out; 1947 } 1948 1949 if (PUFFS_USE_FS_TTL(pmp)) { 1950 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 1951 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 1952 struct vattr *rvap = &symlink_msg->pvnr_va; 1953 1954 update_va(*ap->a_vpp, NULL, rvap, 1955 va_ttl, cn_ttl, SETATTR_CHSIZE); 1956 } 1957 1958 out: 1959 vput(dvp); 1960 PUFFS_MSG_RELEASE(symlink); 1961 1962 return error; 1963 } 1964 1965 int 1966 puffs_vnop_readlink(void *v) 1967 { 1968 struct vop_readlink_args /* { 1969 const struct vnodeop_desc *a_desc; 1970 struct vnode *a_vp; 1971 struct uio *a_uio; 1972 kauth_cred_t a_cred; 1973 } */ *ap = v; 1974 PUFFS_MSG_VARS(vn, readlink); 1975 struct vnode *vp = ap->a_vp; 1976 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1977 size_t linklen; 1978 int error; 1979 1980 PUFFS_MSG_ALLOC(vn, readlink); 1981 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1982 linklen = sizeof(readlink_msg->pvnr_link); 1983 readlink_msg->pvnr_linklen = linklen; 1984 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1985 PUFFS_VN_READLINK, VPTOPNC(vp)); 1986 1987 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1988 error = checkerr(pmp, error, __func__); 1989 if (error) 1990 goto out; 1991 1992 /* bad bad user file server */ 1993 if (readlink_msg->pvnr_linklen > linklen) { 1994 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1995 "linklen too big", VPTOPNC(ap->a_vp)); 1996 error = EPROTO; 1997 goto out; 1998 } 1999 2000 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2001 ap->a_uio); 2002 out: 2003 PUFFS_MSG_RELEASE(readlink); 2004 return error; 2005 } 2006 2007 int 2008 puffs_vnop_rename(void *v) 2009 { 2010 struct vop_rename_args /* { 2011 const struct vnodeop_desc *a_desc; 2012 struct vnode *a_fdvp; 2013 struct vnode *a_fvp; 2014 struct componentname *a_fcnp; 2015 struct vnode *a_tdvp; 2016 struct vnode *a_tvp; 2017 struct componentname *a_tcnp; 2018 } */ *ap = v; 2019 PUFFS_MSG_VARS(vn, rename); 2020 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2021 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2022 struct puffs_node *fpn = ap->a_fvp->v_data; 2023 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2024 int error; 2025 bool doabort = true; 2026 2027 if ((fvp->v_mount != tdvp->v_mount) || 2028 (tvp && (fvp->v_mount != tvp->v_mount))) { 2029 ERROUT(EXDEV); 2030 } 2031 2032 PUFFS_MSG_ALLOC(vn, rename); 2033 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2034 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2035 if (tvp) 2036 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2037 else 2038 rename_msg->pvnr_cookie_targ = NULL; 2039 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2040 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2041 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2042 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2043 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2044 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2045 2046 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2047 doabort = false; 2048 PUFFS_MSG_RELEASE(rename); 2049 error = checkerr(pmp, error, __func__); 2050 2051 /* 2052 * XXX: stay in touch with the cache. I don't like this, but 2053 * don't have a better solution either. See also puffs_link(). 2054 */ 2055 if (error == 0) 2056 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2057 2058 out: 2059 if (doabort) 2060 VOP_ABORTOP(tdvp, ap->a_tcnp); 2061 if (tvp != NULL) 2062 vput(tvp); 2063 if (tdvp == tvp) 2064 vrele(tdvp); 2065 else 2066 vput(tdvp); 2067 2068 if (doabort) 2069 VOP_ABORTOP(fdvp, ap->a_fcnp); 2070 vrele(fdvp); 2071 vrele(fvp); 2072 2073 return error; 2074 } 2075 2076 #define RWARGS(cont, iofl, move, offset, creds) \ 2077 (cont)->pvnr_ioflag = (iofl); \ 2078 (cont)->pvnr_resid = (move); \ 2079 (cont)->pvnr_offset = (offset); \ 2080 puffs_credcvt(&(cont)->pvnr_cred, creds) 2081 2082 int 2083 puffs_vnop_read(void *v) 2084 { 2085 struct vop_read_args /* { 2086 const struct vnodeop_desc *a_desc; 2087 struct vnode *a_vp; 2088 struct uio *a_uio; 2089 int a_ioflag; 2090 kauth_cred_t a_cred; 2091 } */ *ap = v; 2092 PUFFS_MSG_VARS(vn, read); 2093 struct vnode *vp = ap->a_vp; 2094 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2095 struct uio *uio = ap->a_uio; 2096 size_t tomove, argsize; 2097 vsize_t bytelen; 2098 int error; 2099 2100 read_msg = NULL; 2101 error = 0; 2102 2103 /* std sanity */ 2104 if (uio->uio_resid == 0) 2105 return 0; 2106 if (uio->uio_offset < 0) 2107 return EINVAL; 2108 2109 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2110 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2111 2112 while (uio->uio_resid > 0) { 2113 if (vp->v_size <= uio->uio_offset) { 2114 break; 2115 } 2116 bytelen = MIN(uio->uio_resid, 2117 vp->v_size - uio->uio_offset); 2118 if (bytelen == 0) 2119 break; 2120 2121 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2122 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2123 if (error) 2124 break; 2125 } 2126 2127 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2128 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2129 } else { 2130 /* 2131 * in case it's not a regular file or we're operating 2132 * uncached, do read in the old-fashioned style, 2133 * i.e. explicit read operations 2134 */ 2135 2136 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2137 argsize = sizeof(struct puffs_vnmsg_read); 2138 puffs_msgmem_alloc(argsize + tomove, &park_read, 2139 (void *)&read_msg, 1); 2140 2141 error = 0; 2142 while (uio->uio_resid > 0) { 2143 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2144 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2145 RWARGS(read_msg, ap->a_ioflag, tomove, 2146 uio->uio_offset, ap->a_cred); 2147 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2148 PUFFS_VN_READ, VPTOPNC(vp)); 2149 puffs_msg_setdelta(park_read, tomove); 2150 2151 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2152 NULL, error); 2153 error = checkerr(pmp, error, __func__); 2154 if (error) 2155 break; 2156 2157 if (read_msg->pvnr_resid > tomove) { 2158 puffs_senderr(pmp, PUFFS_ERR_READ, 2159 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2160 error = EPROTO; 2161 break; 2162 } 2163 2164 error = uiomove(read_msg->pvnr_data, 2165 tomove - read_msg->pvnr_resid, uio); 2166 2167 /* 2168 * in case the file is out of juice, resid from 2169 * userspace is != 0. and the error-case is 2170 * quite obvious 2171 */ 2172 if (error || read_msg->pvnr_resid) 2173 break; 2174 } 2175 2176 puffs_msgmem_release(park_read); 2177 } 2178 2179 return error; 2180 } 2181 2182 /* 2183 * XXX: in case of a failure, this leaves uio in a bad state. 2184 * We could theoretically copy the uio and iovecs and "replay" 2185 * them the right amount after the userspace trip, but don't 2186 * bother for now. 2187 */ 2188 int 2189 puffs_vnop_write(void *v) 2190 { 2191 struct vop_write_args /* { 2192 const struct vnodeop_desc *a_desc; 2193 struct vnode *a_vp; 2194 struct uio *a_uio; 2195 int a_ioflag; 2196 kauth_cred_t a_cred; 2197 } */ *ap = v; 2198 PUFFS_MSG_VARS(vn, write); 2199 struct vnode *vp = ap->a_vp; 2200 struct puffs_node *pn = VPTOPP(vp); 2201 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2202 struct uio *uio = ap->a_uio; 2203 size_t tomove, argsize; 2204 off_t oldoff, newoff, origoff; 2205 vsize_t bytelen; 2206 int error, uflags; 2207 int ubcflags; 2208 2209 error = uflags = 0; 2210 write_msg = NULL; 2211 2212 mutex_enter(&pn->pn_sizemtx); 2213 2214 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2215 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2216 2217 /* 2218 * userspace *should* be allowed to control this, 2219 * but with UBC it's a bit unclear how to handle it 2220 */ 2221 if (ap->a_ioflag & IO_APPEND) 2222 uio->uio_offset = vp->v_size; 2223 2224 origoff = uio->uio_offset; 2225 while (uio->uio_resid > 0) { 2226 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2227 uflags |= PUFFS_UPDATEATIME; 2228 uflags |= PUFFS_UPDATECTIME; 2229 uflags |= PUFFS_UPDATEMTIME; 2230 oldoff = uio->uio_offset; 2231 bytelen = uio->uio_resid; 2232 2233 newoff = oldoff + bytelen; 2234 if (vp->v_size < newoff) { 2235 uvm_vnp_setwritesize(vp, newoff); 2236 } 2237 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2238 UVM_ADV_RANDOM, ubcflags); 2239 2240 /* 2241 * In case of a ubc_uiomove() error, 2242 * opt to not extend the file at all and 2243 * return an error. Otherwise, if we attempt 2244 * to clear the memory we couldn't fault to, 2245 * we might generate a kernel page fault. 2246 */ 2247 if (vp->v_size < newoff) { 2248 if (error == 0) { 2249 uflags |= PUFFS_UPDATESIZE; 2250 uvm_vnp_setsize(vp, newoff); 2251 } else { 2252 uvm_vnp_setwritesize(vp, vp->v_size); 2253 } 2254 } 2255 if (error) 2256 break; 2257 2258 /* 2259 * If we're writing large files, flush to file server 2260 * every 64k. Otherwise we can very easily exhaust 2261 * kernel and user memory, as the file server cannot 2262 * really keep up with our writing speed. 2263 * 2264 * Note: this does *NOT* honor MNT_ASYNC, because 2265 * that gives userland too much say in the kernel. 2266 */ 2267 if (oldoff >> 16 != uio->uio_offset >> 16) { 2268 mutex_enter(vp->v_interlock); 2269 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2270 uio->uio_offset & ~0xffff, 2271 PGO_CLEANIT | PGO_SYNCIO); 2272 if (error) 2273 break; 2274 } 2275 } 2276 2277 /* synchronous I/O? */ 2278 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2279 mutex_enter(vp->v_interlock); 2280 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2281 round_page(uio->uio_offset), 2282 PGO_CLEANIT | PGO_SYNCIO); 2283 2284 /* write through page cache? */ 2285 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2286 mutex_enter(vp->v_interlock); 2287 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2288 round_page(uio->uio_offset), PGO_CLEANIT); 2289 } 2290 2291 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2292 } else { 2293 /* tomove is non-increasing */ 2294 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2295 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2296 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2297 2298 while (uio->uio_resid > 0) { 2299 /* move data to buffer */ 2300 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2301 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2302 RWARGS(write_msg, ap->a_ioflag, tomove, 2303 uio->uio_offset, ap->a_cred); 2304 error = uiomove(write_msg->pvnr_data, tomove, uio); 2305 if (error) 2306 break; 2307 2308 /* move buffer to userspace */ 2309 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2310 PUFFS_VN_WRITE, VPTOPNC(vp)); 2311 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2312 NULL, error); 2313 error = checkerr(pmp, error, __func__); 2314 if (error) 2315 break; 2316 2317 if (write_msg->pvnr_resid > tomove) { 2318 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2319 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2320 error = EPROTO; 2321 break; 2322 } 2323 2324 /* adjust file size */ 2325 if (vp->v_size < uio->uio_offset) 2326 uvm_vnp_setsize(vp, uio->uio_offset); 2327 2328 /* didn't move everything? bad userspace. bail */ 2329 if (write_msg->pvnr_resid != 0) { 2330 error = EIO; 2331 break; 2332 } 2333 } 2334 puffs_msgmem_release(park_write); 2335 } 2336 2337 mutex_exit(&pn->pn_sizemtx); 2338 return error; 2339 } 2340 2341 int 2342 puffs_vnop_print(void *v) 2343 { 2344 struct vop_print_args /* { 2345 struct vnode *a_vp; 2346 } */ *ap = v; 2347 PUFFS_MSG_VARS(vn, print); 2348 struct vnode *vp = ap->a_vp; 2349 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2350 struct puffs_node *pn = vp->v_data; 2351 int error; 2352 2353 /* kernel portion */ 2354 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2355 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2356 if (vp->v_type == VFIFO) 2357 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2358 printf("\n"); 2359 2360 /* userspace portion */ 2361 if (EXISTSOP(pmp, PRINT)) { 2362 PUFFS_MSG_ALLOC(vn, print); 2363 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2364 PUFFS_VN_PRINT, VPTOPNC(vp)); 2365 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2366 NULL, error); 2367 PUFFS_MSG_RELEASE(print); 2368 } 2369 2370 return 0; 2371 } 2372 2373 int 2374 puffs_vnop_pathconf(void *v) 2375 { 2376 struct vop_pathconf_args /* { 2377 const struct vnodeop_desc *a_desc; 2378 struct vnode *a_vp; 2379 int a_name; 2380 register_t *a_retval; 2381 } */ *ap = v; 2382 PUFFS_MSG_VARS(vn, pathconf); 2383 struct vnode *vp = ap->a_vp; 2384 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2385 int error; 2386 2387 PUFFS_MSG_ALLOC(vn, pathconf); 2388 pathconf_msg->pvnr_name = ap->a_name; 2389 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2390 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2391 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2392 error = checkerr(pmp, error, __func__); 2393 if (!error) 2394 *ap->a_retval = pathconf_msg->pvnr_retval; 2395 PUFFS_MSG_RELEASE(pathconf); 2396 2397 return error; 2398 } 2399 2400 int 2401 puffs_vnop_advlock(void *v) 2402 { 2403 struct vop_advlock_args /* { 2404 const struct vnodeop_desc *a_desc; 2405 struct vnode *a_vp; 2406 void *a_id; 2407 int a_op; 2408 struct flock *a_fl; 2409 int a_flags; 2410 } */ *ap = v; 2411 PUFFS_MSG_VARS(vn, advlock); 2412 struct vnode *vp = ap->a_vp; 2413 struct puffs_node *pn = VPTOPP(vp); 2414 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2415 int error; 2416 2417 if (!EXISTSOP(pmp, ADVLOCK)) 2418 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2419 2420 PUFFS_MSG_ALLOC(vn, advlock); 2421 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2422 sizeof(advlock_msg->pvnr_fl)); 2423 advlock_msg->pvnr_id = ap->a_id; 2424 advlock_msg->pvnr_op = ap->a_op; 2425 advlock_msg->pvnr_flags = ap->a_flags; 2426 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2427 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2428 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2429 error = checkerr(pmp, error, __func__); 2430 PUFFS_MSG_RELEASE(advlock); 2431 2432 return error; 2433 } 2434 2435 int 2436 puffs_vnop_abortop(void *v) 2437 { 2438 struct vop_abortop_args /* { 2439 struct vnode *a_dvp; 2440 struct componentname *a_cnp; 2441 }; */ *ap = v; 2442 PUFFS_MSG_VARS(vn, abortop); 2443 struct vnode *dvp = ap->a_dvp; 2444 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2445 struct componentname *cnp = ap->a_cnp; 2446 2447 if (EXISTSOP(pmp, ABORTOP)) { 2448 PUFFS_MSG_ALLOC(vn, abortop); 2449 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2450 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2451 puffs_msg_setfaf(park_abortop); 2452 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2453 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2454 2455 puffs_msg_enqueue(pmp, park_abortop); 2456 PUFFS_MSG_RELEASE(abortop); 2457 } 2458 2459 return genfs_abortop(v); 2460 } 2461 2462 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2463 2464 /* 2465 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2466 */ 2467 int 2468 puffs_vnop_strategy(void *v) 2469 { 2470 struct vop_strategy_args /* { 2471 const struct vnodeop_desc *a_desc; 2472 struct vnode *a_vp; 2473 struct buf *a_bp; 2474 } */ *ap = v; 2475 PUFFS_MSG_VARS(vn, rw); 2476 struct vnode *vp = ap->a_vp; 2477 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2478 struct puffs_node *pn; 2479 struct buf *bp; 2480 size_t argsize; 2481 size_t tomove, moved; 2482 int error, dofaf, cansleep, dobiodone; 2483 2484 pmp = MPTOPUFFSMP(vp->v_mount); 2485 bp = ap->a_bp; 2486 error = 0; 2487 dofaf = 0; 2488 cansleep = 0; 2489 pn = VPTOPP(vp); 2490 park_rw = NULL; /* explicit */ 2491 dobiodone = 1; 2492 2493 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2494 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2495 ERROUT(EOPNOTSUPP); 2496 2497 /* 2498 * Short-circuit optimization: don't flush buffer in between 2499 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2500 */ 2501 if (pn->pn_stat & PNODE_DYING) { 2502 KASSERT(BUF_ISWRITE(bp)); 2503 bp->b_resid = 0; 2504 goto out; 2505 } 2506 2507 #ifdef DIAGNOSTIC 2508 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2509 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2510 bp->b_bcount); 2511 #endif 2512 2513 /* 2514 * See explanation for the necessity of a FAF in puffs_fsync. 2515 * 2516 * Also, do FAF in case we're suspending. 2517 * See puffs_vfsops.c:pageflush() 2518 */ 2519 if (BUF_ISWRITE(bp)) { 2520 mutex_enter(vp->v_interlock); 2521 if (vp->v_iflag & VI_XLOCK) 2522 dofaf = 1; 2523 if (pn->pn_stat & PNODE_FAF) 2524 dofaf = 1; 2525 mutex_exit(vp->v_interlock); 2526 } 2527 2528 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2529 2530 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2531 2532 /* allocate transport structure */ 2533 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2534 argsize = sizeof(struct puffs_vnmsg_rw); 2535 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2536 (void *)&rw_msg, cansleep); 2537 if (error) 2538 goto out; 2539 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2540 2541 /* 2x2 cases: read/write, faf/nofaf */ 2542 if (BUF_ISREAD(bp)) { 2543 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2544 PUFFS_VN_READ, VPTOPNC(vp)); 2545 puffs_msg_setdelta(park_rw, tomove); 2546 if (BIOASYNC(bp)) { 2547 puffs_msg_setcall(park_rw, 2548 puffs_parkdone_asyncbioread, bp); 2549 puffs_msg_enqueue(pmp, park_rw); 2550 dobiodone = 0; 2551 } else { 2552 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2553 NULL, error); 2554 error = checkerr(pmp, error, __func__); 2555 if (error) 2556 goto out; 2557 2558 if (rw_msg->pvnr_resid > tomove) { 2559 puffs_senderr(pmp, PUFFS_ERR_READ, 2560 E2BIG, "resid grew", VPTOPNC(vp)); 2561 ERROUT(EPROTO); 2562 } 2563 2564 moved = tomove - rw_msg->pvnr_resid; 2565 2566 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2567 bp->b_resid = bp->b_bcount - moved; 2568 } 2569 } else { 2570 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2571 PUFFS_VN_WRITE, VPTOPNC(vp)); 2572 /* 2573 * make pages read-only before we write them if we want 2574 * write caching info 2575 */ 2576 if (PUFFS_WCACHEINFO(pmp)) { 2577 struct uvm_object *uobj = &vp->v_uobj; 2578 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2579 struct vm_page *vmp; 2580 int i; 2581 2582 for (i = 0; i < npages; i++) { 2583 vmp= uvm_pageratop((vaddr_t)bp->b_data 2584 + (i << PAGE_SHIFT)); 2585 DPRINTF(("puffs_strategy: write-protecting " 2586 "vp %p page %p, offset %" PRId64"\n", 2587 vp, vmp, vmp->offset)); 2588 mutex_enter(uobj->vmobjlock); 2589 vmp->flags |= PG_RDONLY; 2590 pmap_page_protect(vmp, VM_PROT_READ); 2591 mutex_exit(uobj->vmobjlock); 2592 } 2593 } 2594 2595 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2596 if (dofaf) { 2597 puffs_msg_setfaf(park_rw); 2598 } else if (BIOASYNC(bp)) { 2599 puffs_msg_setcall(park_rw, 2600 puffs_parkdone_asyncbiowrite, bp); 2601 dobiodone = 0; 2602 } 2603 2604 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2605 2606 if (dobiodone == 0) 2607 goto out; 2608 2609 /* 2610 * XXXXXXXX: wrong, but kernel can't survive strategy 2611 * failure currently. Here, have one more X: X. 2612 */ 2613 if (error != ENOMEM) 2614 error = 0; 2615 2616 error = checkerr(pmp, error, __func__); 2617 if (error) 2618 goto out; 2619 2620 if (rw_msg->pvnr_resid > tomove) { 2621 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2622 E2BIG, "resid grew", VPTOPNC(vp)); 2623 ERROUT(EPROTO); 2624 } 2625 2626 /* 2627 * FAF moved everything. Frankly, we don't 2628 * really have a choice. 2629 */ 2630 if (dofaf && error == 0) 2631 moved = tomove; 2632 else 2633 moved = tomove - rw_msg->pvnr_resid; 2634 2635 bp->b_resid = bp->b_bcount - moved; 2636 if (bp->b_resid != 0) { 2637 ERROUT(EIO); 2638 } 2639 } 2640 2641 out: 2642 if (park_rw) 2643 puffs_msgmem_release(park_rw); 2644 2645 if (error) 2646 bp->b_error = error; 2647 2648 if (error || dobiodone) 2649 biodone(bp); 2650 2651 return error; 2652 } 2653 2654 int 2655 puffs_vnop_mmap(void *v) 2656 { 2657 struct vop_mmap_args /* { 2658 const struct vnodeop_desc *a_desc; 2659 struct vnode *a_vp; 2660 vm_prot_t a_prot; 2661 kauth_cred_t a_cred; 2662 } */ *ap = v; 2663 PUFFS_MSG_VARS(vn, mmap); 2664 struct vnode *vp = ap->a_vp; 2665 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2666 int error; 2667 2668 if (!PUFFS_USE_PAGECACHE(pmp)) 2669 return genfs_eopnotsupp(v); 2670 2671 if (EXISTSOP(pmp, MMAP)) { 2672 PUFFS_MSG_ALLOC(vn, mmap); 2673 mmap_msg->pvnr_prot = ap->a_prot; 2674 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2675 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2676 PUFFS_VN_MMAP, VPTOPNC(vp)); 2677 2678 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2679 error = checkerr(pmp, error, __func__); 2680 PUFFS_MSG_RELEASE(mmap); 2681 } else { 2682 error = genfs_mmap(v); 2683 } 2684 2685 return error; 2686 } 2687 2688 2689 /* 2690 * The rest don't get a free trip to userspace and back, they 2691 * have to stay within the kernel. 2692 */ 2693 2694 /* 2695 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2696 * well, maybe somehow, somewhere, some day .... 2697 */ 2698 int 2699 puffs_vnop_bmap(void *v) 2700 { 2701 struct vop_bmap_args /* { 2702 const struct vnodeop_desc *a_desc; 2703 struct vnode *a_vp; 2704 daddr_t a_bn; 2705 struct vnode **a_vpp; 2706 daddr_t *a_bnp; 2707 int *a_runp; 2708 } */ *ap = v; 2709 struct puffs_mount *pmp; 2710 2711 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2712 2713 if (ap->a_vpp) 2714 *ap->a_vpp = ap->a_vp; 2715 if (ap->a_bnp) 2716 *ap->a_bnp = ap->a_bn; 2717 if (ap->a_runp) 2718 *ap->a_runp 2719 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2720 2721 return 0; 2722 } 2723 2724 /* 2725 * Handle getpages faults in puffs. We let genfs_getpages() do most 2726 * of the dirty work, but we come in this route to do accounting tasks. 2727 * If the user server has specified functions for cache notifications 2728 * about reads and/or writes, we record which type of operation we got, 2729 * for which page range, and proceed to issue a FAF notification to the 2730 * server about it. 2731 */ 2732 int 2733 puffs_vnop_getpages(void *v) 2734 { 2735 struct vop_getpages_args /* { 2736 const struct vnodeop_desc *a_desc; 2737 struct vnode *a_vp; 2738 voff_t a_offset; 2739 struct vm_page **a_m; 2740 int *a_count; 2741 int a_centeridx; 2742 vm_prot_t a_access_type; 2743 int a_advice; 2744 int a_flags; 2745 } */ *ap = v; 2746 struct puffs_mount *pmp; 2747 struct puffs_node *pn; 2748 struct vnode *vp; 2749 struct vm_page **pgs; 2750 struct puffs_cacheinfo *pcinfo = NULL; 2751 struct puffs_cacherun *pcrun; 2752 void *parkmem = NULL; 2753 size_t runsizes; 2754 int i, npages, si, streakon; 2755 int error, locked, write; 2756 2757 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2758 npages = *ap->a_count; 2759 pgs = ap->a_m; 2760 vp = ap->a_vp; 2761 pn = vp->v_data; 2762 locked = (ap->a_flags & PGO_LOCKED) != 0; 2763 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2764 2765 /* ccg xnaht - gets Wuninitialized wrong */ 2766 pcrun = NULL; 2767 runsizes = 0; 2768 2769 /* 2770 * Check that we aren't trying to fault in pages which our file 2771 * server doesn't know about. This happens if we extend a file by 2772 * skipping some pages and later try to fault in pages which 2773 * are between pn_serversize and vp_size. This check optimizes 2774 * away the common case where a file is being extended. 2775 */ 2776 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2777 struct vattr va; 2778 2779 /* try again later when we can block */ 2780 if (locked) 2781 ERROUT(EBUSY); 2782 2783 mutex_exit(vp->v_interlock); 2784 vattr_null(&va); 2785 va.va_size = vp->v_size; 2786 error = dosetattr(vp, &va, FSCRED, 0); 2787 if (error) 2788 ERROUT(error); 2789 mutex_enter(vp->v_interlock); 2790 } 2791 2792 if (write && PUFFS_WCACHEINFO(pmp)) { 2793 #ifdef notnowjohn 2794 /* allocate worst-case memory */ 2795 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2796 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2797 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2798 locked ? KM_NOSLEEP : KM_SLEEP); 2799 2800 /* 2801 * can't block if we're locked and can't mess up caching 2802 * information for fs server. so come back later, please 2803 */ 2804 if (pcinfo == NULL) 2805 ERROUT(ENOMEM); 2806 2807 parkmem = puffs_park_alloc(locked == 0); 2808 if (parkmem == NULL) 2809 ERROUT(ENOMEM); 2810 2811 pcrun = pcinfo->pcache_runs; 2812 #else 2813 (void)parkmem; 2814 #endif 2815 } 2816 2817 error = genfs_getpages(v); 2818 if (error) 2819 goto out; 2820 2821 if (PUFFS_WCACHEINFO(pmp) == 0) 2822 goto out; 2823 2824 /* 2825 * Let's see whose fault it was and inform the user server of 2826 * possibly read/written pages. Map pages from read faults 2827 * strictly read-only, since otherwise we might miss info on 2828 * when the page is actually write-faulted to. 2829 */ 2830 if (!locked) 2831 mutex_enter(vp->v_uobj.vmobjlock); 2832 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2833 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2834 if (streakon && write) { 2835 streakon = 0; 2836 pcrun[si].pcache_runend 2837 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2838 si++; 2839 } 2840 continue; 2841 } 2842 if (streakon == 0 && write) { 2843 streakon = 1; 2844 pcrun[si].pcache_runstart = pgs[i]->offset; 2845 } 2846 2847 if (!write) 2848 pgs[i]->flags |= PG_RDONLY; 2849 } 2850 /* was the last page part of our streak? */ 2851 if (streakon) { 2852 pcrun[si].pcache_runend 2853 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2854 si++; 2855 } 2856 if (!locked) 2857 mutex_exit(vp->v_uobj.vmobjlock); 2858 2859 KASSERT(si <= (npages / 2) + 1); 2860 2861 #ifdef notnowjohn 2862 /* send results to userspace */ 2863 if (write) 2864 puffs_cacheop(pmp, parkmem, pcinfo, 2865 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2866 #endif 2867 2868 out: 2869 if (error) { 2870 if (pcinfo != NULL) 2871 kmem_free(pcinfo, 2872 sizeof(struct puffs_cacheinfo) + runsizes); 2873 #ifdef notnowjohn 2874 if (parkmem != NULL) 2875 puffs_park_release(parkmem, 1); 2876 #endif 2877 } 2878 2879 return error; 2880 } 2881 2882 /* 2883 * Extended attribute support. 2884 */ 2885 2886 int 2887 puffs_vnop_getextattr(void *v) 2888 { 2889 struct vop_getextattr_args /* 2890 struct vnode *a_vp; 2891 int a_attrnamespace; 2892 const char *a_name; 2893 struct uio *a_uio; 2894 size_t *a_size; 2895 kauth_cred_t a_cred; 2896 }; */ *ap = v; 2897 PUFFS_MSG_VARS(vn, getextattr); 2898 struct vnode *vp = ap->a_vp; 2899 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2900 int attrnamespace = ap->a_attrnamespace; 2901 const char *name = ap->a_name; 2902 struct uio *uio = ap->a_uio; 2903 size_t *sizep = ap->a_size; 2904 size_t tomove, resid; 2905 int error; 2906 2907 if (uio) 2908 resid = uio->uio_resid; 2909 else 2910 resid = 0; 2911 2912 tomove = PUFFS_TOMOVE(resid, pmp); 2913 if (tomove != resid) { 2914 error = E2BIG; 2915 goto out; 2916 } 2917 2918 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 2919 &park_getextattr, (void *)&getextattr_msg, 1); 2920 2921 getextattr_msg->pvnr_attrnamespace = attrnamespace; 2922 strlcpy(getextattr_msg->pvnr_attrname, name, 2923 sizeof(getextattr_msg->pvnr_attrname)); 2924 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 2925 if (sizep) 2926 getextattr_msg->pvnr_datasize = 1; 2927 getextattr_msg->pvnr_resid = tomove; 2928 2929 puffs_msg_setinfo(park_getextattr, 2930 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 2931 puffs_msg_setdelta(park_getextattr, tomove); 2932 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 2933 2934 error = checkerr(pmp, error, __func__); 2935 if (error) 2936 goto out; 2937 2938 resid = getextattr_msg->pvnr_resid; 2939 if (resid > tomove) { 2940 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 2941 "resid grew", VPTOPNC(vp)); 2942 error = EPROTO; 2943 goto out; 2944 } 2945 2946 if (sizep) 2947 *sizep = getextattr_msg->pvnr_datasize; 2948 if (uio) 2949 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 2950 2951 out: 2952 PUFFS_MSG_RELEASE(getextattr); 2953 return error; 2954 } 2955 2956 int 2957 puffs_vnop_setextattr(void *v) 2958 { 2959 struct vop_setextattr_args /* { 2960 struct vnode *a_vp; 2961 int a_attrnamespace; 2962 const char *a_name; 2963 struct uio *a_uio; 2964 kauth_cred_t a_cred; 2965 }; */ *ap = v; 2966 PUFFS_MSG_VARS(vn, setextattr); 2967 struct vnode *vp = ap->a_vp; 2968 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2969 int attrnamespace = ap->a_attrnamespace; 2970 const char *name = ap->a_name; 2971 struct uio *uio = ap->a_uio; 2972 size_t tomove, resid; 2973 int error; 2974 2975 if (uio) 2976 resid = uio->uio_resid; 2977 else 2978 resid = 0; 2979 2980 tomove = PUFFS_TOMOVE(resid, pmp); 2981 if (tomove != resid) { 2982 error = E2BIG; 2983 goto out; 2984 } 2985 2986 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 2987 &park_setextattr, (void *)&setextattr_msg, 1); 2988 2989 setextattr_msg->pvnr_attrnamespace = attrnamespace; 2990 strlcpy(setextattr_msg->pvnr_attrname, name, 2991 sizeof(setextattr_msg->pvnr_attrname)); 2992 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 2993 setextattr_msg->pvnr_resid = tomove; 2994 2995 if (uio) { 2996 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 2997 if (error) 2998 goto out; 2999 } 3000 3001 puffs_msg_setinfo(park_setextattr, 3002 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3003 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3004 3005 error = checkerr(pmp, error, __func__); 3006 if (error) 3007 goto out; 3008 3009 if (setextattr_msg->pvnr_resid != 0) 3010 error = EIO; 3011 3012 out: 3013 PUFFS_MSG_RELEASE(setextattr); 3014 3015 return error; 3016 } 3017 3018 int 3019 puffs_vnop_listextattr(void *v) 3020 { 3021 struct vop_listextattr_args /* { 3022 struct vnode *a_vp; 3023 int a_attrnamespace; 3024 struct uio *a_uio; 3025 size_t *a_size; 3026 int a_flag, 3027 kauth_cred_t a_cred; 3028 }; */ *ap = v; 3029 PUFFS_MSG_VARS(vn, listextattr); 3030 struct vnode *vp = ap->a_vp; 3031 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3032 int attrnamespace = ap->a_attrnamespace; 3033 struct uio *uio = ap->a_uio; 3034 size_t *sizep = ap->a_size; 3035 int flag = ap->a_flag; 3036 size_t tomove, resid; 3037 int error; 3038 3039 if (uio) 3040 resid = uio->uio_resid; 3041 else 3042 resid = 0; 3043 3044 tomove = PUFFS_TOMOVE(resid, pmp); 3045 if (tomove != resid) { 3046 error = E2BIG; 3047 goto out; 3048 } 3049 3050 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3051 &park_listextattr, (void *)&listextattr_msg, 1); 3052 3053 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3054 listextattr_msg->pvnr_flag = flag; 3055 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3056 listextattr_msg->pvnr_resid = tomove; 3057 if (sizep) 3058 listextattr_msg->pvnr_datasize = 1; 3059 3060 puffs_msg_setinfo(park_listextattr, 3061 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3062 puffs_msg_setdelta(park_listextattr, tomove); 3063 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3064 3065 error = checkerr(pmp, error, __func__); 3066 if (error) 3067 goto out; 3068 3069 resid = listextattr_msg->pvnr_resid; 3070 if (resid > tomove) { 3071 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3072 "resid grew", VPTOPNC(vp)); 3073 error = EPROTO; 3074 goto out; 3075 } 3076 3077 if (sizep) 3078 *sizep = listextattr_msg->pvnr_datasize; 3079 if (uio) 3080 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3081 3082 out: 3083 PUFFS_MSG_RELEASE(listextattr); 3084 return error; 3085 } 3086 3087 int 3088 puffs_vnop_deleteextattr(void *v) 3089 { 3090 struct vop_deleteextattr_args /* { 3091 struct vnode *a_vp; 3092 int a_attrnamespace; 3093 const char *a_name; 3094 kauth_cred_t a_cred; 3095 }; */ *ap = v; 3096 PUFFS_MSG_VARS(vn, deleteextattr); 3097 struct vnode *vp = ap->a_vp; 3098 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3099 int attrnamespace = ap->a_attrnamespace; 3100 const char *name = ap->a_name; 3101 int error; 3102 3103 PUFFS_MSG_ALLOC(vn, deleteextattr); 3104 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3105 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3106 sizeof(deleteextattr_msg->pvnr_attrname)); 3107 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3108 3109 puffs_msg_setinfo(park_deleteextattr, 3110 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3111 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3112 vp->v_data, NULL, error); 3113 3114 error = checkerr(pmp, error, __func__); 3115 3116 PUFFS_MSG_RELEASE(deleteextattr); 3117 return error; 3118 } 3119 3120 /* 3121 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3122 * FAF update information for the puffs node first. 3123 */ 3124 int 3125 puffs_vnop_spec_read(void *v) 3126 { 3127 struct vop_read_args /* { 3128 const struct vnodeop_desc *a_desc; 3129 struct vnode *a_vp; 3130 struct uio *a_uio; 3131 int a_ioflag; 3132 kauth_cred_t a_cred; 3133 } */ *ap = v; 3134 3135 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3136 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3137 } 3138 3139 int 3140 puffs_vnop_spec_write(void *v) 3141 { 3142 struct vop_write_args /* { 3143 const struct vnodeop_desc *a_desc; 3144 struct vnode *a_vp; 3145 struct uio *a_uio; 3146 int a_ioflag; 3147 kauth_cred_t a_cred; 3148 } */ *ap = v; 3149 3150 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3151 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3152 } 3153 3154 int 3155 puffs_vnop_fifo_read(void *v) 3156 { 3157 struct vop_read_args /* { 3158 const struct vnodeop_desc *a_desc; 3159 struct vnode *a_vp; 3160 struct uio *a_uio; 3161 int a_ioflag; 3162 kauth_cred_t a_cred; 3163 } */ *ap = v; 3164 3165 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3166 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3167 } 3168 3169 int 3170 puffs_vnop_fifo_write(void *v) 3171 { 3172 struct vop_write_args /* { 3173 const struct vnodeop_desc *a_desc; 3174 struct vnode *a_vp; 3175 struct uio *a_uio; 3176 int a_ioflag; 3177 kauth_cred_t a_cred; 3178 } */ *ap = v; 3179 3180 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3181 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3182 } 3183
Indexes created Wed Oct 01 13:09:50 GMT 2025