puffs_vnops.c revision 1.175
1 /* $NetBSD: puffs_vnops.c,v 1.175 2012/11/05 17:24:10 dholland 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 1.175 2012/11/05 17:24:10 dholland 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 static void update_parent(struct vnode *, struct vnode *); 422 423 424 #define PUFFS_ABORT_LOOKUP 1 425 #define PUFFS_ABORT_CREATE 2 426 #define PUFFS_ABORT_MKNOD 3 427 #define PUFFS_ABORT_MKDIR 4 428 #define PUFFS_ABORT_SYMLINK 5 429 430 /* 431 * Press the pani^Wabort button! Kernel resource allocation failed. 432 */ 433 static void 434 puffs_abortbutton(struct puffs_mount *pmp, int what, 435 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 436 { 437 438 switch (what) { 439 case PUFFS_ABORT_CREATE: 440 case PUFFS_ABORT_MKNOD: 441 case PUFFS_ABORT_SYMLINK: 442 callremove(pmp, dck, ck, cnp); 443 break; 444 case PUFFS_ABORT_MKDIR: 445 callrmdir(pmp, dck, ck, cnp); 446 break; 447 } 448 449 callinactive(pmp, ck, 0); 450 callreclaim(pmp, ck, 1); 451 } 452 453 /* 454 * Begin vnode operations. 455 * 456 * A word from the keymaster about locks: generally we don't want 457 * to use the vnode locks at all: it creates an ugly dependency between 458 * the userlandia file server and the kernel. But we'll play along with 459 * the kernel vnode locks for now. However, even currently we attempt 460 * to release locks as early as possible. This is possible for some 461 * operations which a) don't need a locked vnode after the userspace op 462 * and b) return with the vnode unlocked. Theoretically we could 463 * unlock-do op-lock for others and order the graph in userspace, but I 464 * don't want to think of the consequences for the time being. 465 */ 466 467 #define TTL_TO_TIMEOUT(ts) \ 468 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 469 #define TTL_VALID(ts) \ 470 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 471 #define TIMED_OUT(expire) \ 472 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 473 int 474 puffs_vnop_lookup(void *v) 475 { 476 struct vop_lookup_args /* { 477 const struct vnodeop_desc *a_desc; 478 struct vnode *a_dvp; 479 struct vnode **a_vpp; 480 struct componentname *a_cnp; 481 } */ *ap = v; 482 PUFFS_MSG_VARS(vn, lookup); 483 struct puffs_mount *pmp; 484 struct componentname *cnp; 485 struct vnode *vp, *dvp, *cvp; 486 struct puffs_node *dpn, *cpn; 487 int isdot; 488 int error; 489 490 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 491 cnp = ap->a_cnp; 492 dvp = ap->a_dvp; 493 cvp = NULL; 494 cpn = NULL; 495 *ap->a_vpp = NULL; 496 497 /* r/o fs? we check create later to handle EEXIST */ 498 if ((cnp->cn_flags & ISLASTCN) 499 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 500 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 501 return EROFS; 502 503 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 504 505 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 506 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 507 508 /* 509 * If dotdot cache is enabled, unlock parent, lock .. 510 * (grand-parent) and relock parent. 511 */ 512 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 513 VOP_UNLOCK(dvp); 514 515 vp = VPTOPP(ap->a_dvp)->pn_parent; 516 vref(vp); 517 518 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 519 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 520 521 *ap->a_vpp = vp; 522 return 0; 523 } 524 525 /* 526 * Check if someone fed it into the cache 527 */ 528 if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 529 int found, iswhiteout; 530 531 found = cache_lookup(dvp, cnp, &iswhiteout, ap->a_vpp); 532 if (iswhiteout) { 533 cnp->cn_flags |= ISWHITEOUT; 534 } 535 536 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 537 cvp = *ap->a_vpp; 538 cpn = VPTOPP(cvp); 539 540 if (TIMED_OUT(cpn->pn_cn_timeout)) { 541 cache_purge(cvp); 542 /* 543 * cached vnode (cvp) is still locked 544 * so that we can reuse it upon a new 545 * successful lookup. 546 */ 547 *ap->a_vpp = NULL; 548 found = 0; 549 } 550 } 551 552 /* 553 * Do not use negative caching, since the filesystem 554 * provides no TTL for it. 555 */ 556 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 557 found = 0; 558 559 if (found) { 560 return *ap->a_vpp == NULLVP ? ENOENT : 0; 561 } 562 563 /* 564 * This is what would have been left in ERROR before 565 * the rearrangement of cache_lookup(). What with all 566 * the macros, I am not sure if this is a dead value 567 * below or not. 568 */ 569 error = -1; 570 } 571 572 if (isdot) { 573 /* deal with rename lookup semantics */ 574 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 575 return EISDIR; 576 577 vp = ap->a_dvp; 578 vref(vp); 579 *ap->a_vpp = vp; 580 return 0; 581 } 582 583 if (cvp != NULL) 584 mutex_enter(&cpn->pn_sizemtx); 585 586 PUFFS_MSG_ALLOC(vn, lookup); 587 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 588 cnp, PUFFS_USE_FULLPNBUF(pmp)); 589 590 if (cnp->cn_flags & ISDOTDOT) 591 VOP_UNLOCK(dvp); 592 593 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 594 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 595 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 596 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 597 598 /* 599 * In case of error, there is no new vnode to play with, so be 600 * happy with the NULL value given to vpp in the beginning. 601 * Also, check if this really was an error or the target was not 602 * present. Either treat it as a non-error for CREATE/RENAME or 603 * enter the component into the negative name cache (if desired). 604 */ 605 if (error) { 606 error = checkerr(pmp, error, __func__); 607 if (error == ENOENT) { 608 /* don't allow to create files on r/o fs */ 609 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 610 && cnp->cn_nameiop == CREATE) { 611 error = EROFS; 612 613 /* adjust values if we are creating */ 614 } else if ((cnp->cn_flags & ISLASTCN) 615 && (cnp->cn_nameiop == CREATE 616 || cnp->cn_nameiop == RENAME)) { 617 error = EJUSTRETURN; 618 619 /* save negative cache entry */ 620 } else { 621 if (PUFFS_USE_NAMECACHE(pmp) && 622 !PUFFS_USE_FS_TTL(pmp)) 623 cache_enter(dvp, NULL, cnp); 624 } 625 } 626 goto out; 627 } 628 629 /* 630 * Check that we don't get our parent node back, that would cause 631 * a pretty obvious deadlock. 632 */ 633 dpn = dvp->v_data; 634 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 635 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 636 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 637 error = EPROTO; 638 goto out; 639 } 640 641 /* 642 * Check if we looked up the cached vnode 643 */ 644 vp = NULL; 645 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 646 int grace; 647 648 /* 649 * Bump grace time of this node so that it does not get 650 * reclaimed too fast. We try to increase a bit more the 651 * lifetime of busiest * nodes - with some limits. 652 */ 653 grace = 10 * puffs_sopreq_expire_timeout; 654 cpn->pn_cn_grace = hardclock_ticks + grace; 655 vp = cvp; 656 } 657 658 /* 659 * No cached vnode available, or the cached vnode does not 660 * match the userland cookie anymore: is the node known? 661 */ 662 if (vp == NULL) { 663 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 664 1, 1, &vp); 665 } 666 667 if (error == PUFFS_NOSUCHCOOKIE) { 668 error = puffs_getvnode(dvp->v_mount, 669 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 670 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 671 if (error) { 672 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 673 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 674 ap->a_cnp); 675 goto out; 676 } 677 678 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 679 } else if (error) { 680 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 681 lookup_msg->pvnr_newnode, ap->a_cnp); 682 goto out; 683 } 684 685 /* 686 * Update cache and TTL 687 */ 688 if (PUFFS_USE_FS_TTL(pmp)) { 689 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 690 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 691 update_va(vp, NULL, &lookup_msg->pvnr_va, 692 va_ttl, cn_ttl, SETATTR_CHSIZE); 693 } 694 695 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 696 *ap->a_vpp = vp; 697 698 if (PUFFS_USE_NAMECACHE(pmp)) 699 cache_enter(dvp, vp, cnp); 700 701 /* XXX */ 702 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 703 cnp->cn_flags &= ~REQUIREDIR; 704 if (lookup_msg->pvnr_cn.pkcn_consume) 705 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 706 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 707 708 VPTOPP(vp)->pn_nlookup++; 709 710 if (PUFFS_USE_DOTDOTCACHE(pmp) && 711 (VPTOPP(vp)->pn_parent != dvp)) 712 update_parent(vp, dvp); 713 714 out: 715 if (cvp != NULL) { 716 mutex_exit(&cpn->pn_sizemtx); 717 718 if (error || (cvp != vp)) 719 vput(cvp); 720 } 721 722 if (cnp->cn_flags & ISDOTDOT) 723 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 724 725 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 726 PUFFS_MSG_RELEASE(lookup); 727 return error; 728 } 729 730 #define REFPN_AND_UNLOCKVP(a, b) \ 731 do { \ 732 mutex_enter(&b->pn_mtx); \ 733 puffs_referencenode(b); \ 734 mutex_exit(&b->pn_mtx); \ 735 VOP_UNLOCK(a); \ 736 } while (/*CONSTCOND*/0) 737 738 #define REFPN(b) \ 739 do { \ 740 mutex_enter(&b->pn_mtx); \ 741 puffs_referencenode(b); \ 742 mutex_exit(&b->pn_mtx); \ 743 } while (/*CONSTCOND*/0) 744 745 #define RELEPN_AND_VP(a, b) \ 746 do { \ 747 puffs_releasenode(b); \ 748 vrele(a); \ 749 } while (/*CONSTCOND*/0) 750 751 int 752 puffs_vnop_create(void *v) 753 { 754 struct vop_create_args /* { 755 const struct vnodeop_desc *a_desc; 756 struct vnode *a_dvp; 757 struct vnode **a_vpp; 758 struct componentname *a_cnp; 759 struct vattr *a_vap; 760 } */ *ap = v; 761 PUFFS_MSG_VARS(vn, create); 762 struct vnode *dvp = ap->a_dvp; 763 struct puffs_node *dpn = VPTOPP(dvp); 764 struct componentname *cnp = ap->a_cnp; 765 struct mount *mp = dvp->v_mount; 766 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 767 int error; 768 769 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 770 dvp, ap->a_cnp->cn_nameptr)); 771 772 PUFFS_MSG_ALLOC(vn, create); 773 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 774 cnp, PUFFS_USE_FULLPNBUF(pmp)); 775 create_msg->pvnr_va = *ap->a_vap; 776 puffs_msg_setinfo(park_create, PUFFSOP_VN, 777 PUFFS_VN_CREATE, VPTOPNC(dvp)); 778 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 779 780 error = checkerr(pmp, error, __func__); 781 if (error) 782 goto out; 783 784 error = puffs_newnode(mp, dvp, ap->a_vpp, 785 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 786 if (error) { 787 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 788 create_msg->pvnr_newnode, cnp); 789 goto out; 790 } 791 792 if (PUFFS_USE_FS_TTL(pmp)) { 793 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 794 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 795 struct vattr *rvap = &create_msg->pvnr_va; 796 797 update_va(*ap->a_vpp, NULL, rvap, 798 va_ttl, cn_ttl, SETATTR_CHSIZE); 799 } 800 801 VPTOPP(*ap->a_vpp)->pn_nlookup++; 802 803 if (PUFFS_USE_DOTDOTCACHE(pmp) && 804 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 805 update_parent(*ap->a_vpp, dvp); 806 807 out: 808 vput(dvp); 809 810 DPRINTF(("puffs_create: return %d\n", error)); 811 PUFFS_MSG_RELEASE(create); 812 return error; 813 } 814 815 int 816 puffs_vnop_mknod(void *v) 817 { 818 struct vop_mknod_args /* { 819 const struct vnodeop_desc *a_desc; 820 struct vnode *a_dvp; 821 struct vnode **a_vpp; 822 struct componentname *a_cnp; 823 struct vattr *a_vap; 824 } */ *ap = v; 825 PUFFS_MSG_VARS(vn, mknod); 826 struct vnode *dvp = ap->a_dvp; 827 struct puffs_node *dpn = VPTOPP(dvp); 828 struct componentname *cnp = ap->a_cnp; 829 struct mount *mp = dvp->v_mount; 830 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 831 int error; 832 833 PUFFS_MSG_ALLOC(vn, mknod); 834 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 835 cnp, PUFFS_USE_FULLPNBUF(pmp)); 836 mknod_msg->pvnr_va = *ap->a_vap; 837 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 838 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 839 840 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 841 842 error = checkerr(pmp, error, __func__); 843 if (error) 844 goto out; 845 846 error = puffs_newnode(mp, dvp, ap->a_vpp, 847 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 848 ap->a_vap->va_rdev); 849 if (error) { 850 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 851 mknod_msg->pvnr_newnode, cnp); 852 goto out; 853 } 854 855 if (PUFFS_USE_FS_TTL(pmp)) { 856 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 857 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 858 struct vattr *rvap = &mknod_msg->pvnr_va; 859 860 update_va(*ap->a_vpp, NULL, rvap, 861 va_ttl, cn_ttl, SETATTR_CHSIZE); 862 } 863 864 VPTOPP(*ap->a_vpp)->pn_nlookup++; 865 866 if (PUFFS_USE_DOTDOTCACHE(pmp) && 867 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 868 update_parent(*ap->a_vpp, dvp); 869 870 out: 871 vput(dvp); 872 PUFFS_MSG_RELEASE(mknod); 873 return error; 874 } 875 876 int 877 puffs_vnop_open(void *v) 878 { 879 struct vop_open_args /* { 880 const struct vnodeop_desc *a_desc; 881 struct vnode *a_vp; 882 int a_mode; 883 kauth_cred_t a_cred; 884 } */ *ap = v; 885 PUFFS_MSG_VARS(vn, open); 886 struct vnode *vp = ap->a_vp; 887 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 888 int mode = ap->a_mode; 889 int error; 890 891 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 892 893 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 894 ERROUT(EROFS); 895 896 if (!EXISTSOP(pmp, OPEN)) 897 ERROUT(0); 898 899 PUFFS_MSG_ALLOC(vn, open); 900 open_msg->pvnr_mode = mode; 901 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 902 puffs_msg_setinfo(park_open, PUFFSOP_VN, 903 PUFFS_VN_OPEN, VPTOPNC(vp)); 904 905 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 906 error = checkerr(pmp, error, __func__); 907 908 out: 909 DPRINTF(("puffs_open: returning %d\n", error)); 910 PUFFS_MSG_RELEASE(open); 911 return error; 912 } 913 914 int 915 puffs_vnop_close(void *v) 916 { 917 struct vop_close_args /* { 918 const struct vnodeop_desc *a_desc; 919 struct vnode *a_vp; 920 int a_fflag; 921 kauth_cred_t a_cred; 922 } */ *ap = v; 923 PUFFS_MSG_VARS(vn, close); 924 struct vnode *vp = ap->a_vp; 925 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 926 927 PUFFS_MSG_ALLOC(vn, close); 928 puffs_msg_setfaf(park_close); 929 close_msg->pvnr_fflag = ap->a_fflag; 930 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 931 puffs_msg_setinfo(park_close, PUFFSOP_VN, 932 PUFFS_VN_CLOSE, VPTOPNC(vp)); 933 934 puffs_msg_enqueue(pmp, park_close); 935 PUFFS_MSG_RELEASE(close); 936 return 0; 937 } 938 939 int 940 puffs_vnop_access(void *v) 941 { 942 struct vop_access_args /* { 943 const struct vnodeop_desc *a_desc; 944 struct vnode *a_vp; 945 int a_mode; 946 kauth_cred_t a_cred; 947 } */ *ap = v; 948 PUFFS_MSG_VARS(vn, access); 949 struct vnode *vp = ap->a_vp; 950 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 951 int mode = ap->a_mode; 952 int error; 953 954 if (mode & VWRITE) { 955 switch (vp->v_type) { 956 case VDIR: 957 case VLNK: 958 case VREG: 959 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 960 || !EXISTSOP(pmp, WRITE)) 961 return EROFS; 962 break; 963 default: 964 break; 965 } 966 } 967 968 if (!EXISTSOP(pmp, ACCESS)) 969 return 0; 970 971 PUFFS_MSG_ALLOC(vn, access); 972 access_msg->pvnr_mode = ap->a_mode; 973 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 974 puffs_msg_setinfo(park_access, PUFFSOP_VN, 975 PUFFS_VN_ACCESS, VPTOPNC(vp)); 976 977 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 978 error = checkerr(pmp, error, __func__); 979 PUFFS_MSG_RELEASE(access); 980 981 return error; 982 } 983 984 static void 985 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 986 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 987 { 988 struct puffs_node *pn = VPTOPP(vp); 989 990 if (TTL_VALID(cn_ttl)) { 991 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 992 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 993 } 994 995 /* 996 * Don't listen to the file server regarding special device 997 * size info, the file server doesn't know anything about them. 998 */ 999 if (vp->v_type == VBLK || vp->v_type == VCHR) 1000 rvap->va_size = vp->v_size; 1001 1002 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1003 if (vp->v_type == VBLK) 1004 rvap->va_blocksize = BLKDEV_IOSIZE; 1005 else if (vp->v_type == VCHR) 1006 rvap->va_blocksize = MAXBSIZE; 1007 1008 if (vap != NULL) { 1009 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1010 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1011 1012 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1013 vap->va_atime = pn->pn_mc_atime; 1014 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1015 vap->va_ctime = pn->pn_mc_ctime; 1016 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1017 vap->va_mtime = pn->pn_mc_mtime; 1018 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1019 vap->va_size = pn->pn_mc_size; 1020 } 1021 1022 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1023 if (rvap->va_size != VNOVAL 1024 && vp->v_type != VBLK && vp->v_type != VCHR) { 1025 uvm_vnp_setsize(vp, rvap->va_size); 1026 pn->pn_serversize = rvap->va_size; 1027 } 1028 } 1029 1030 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1031 if (pn->pn_va_cache == NULL) 1032 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1033 1034 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1035 1036 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1037 } 1038 } 1039 1040 static void 1041 update_parent(struct vnode *vp, struct vnode *dvp) 1042 { 1043 struct puffs_node *pn = VPTOPP(vp); 1044 1045 if (pn->pn_parent != NULL) { 1046 KASSERT(pn->pn_parent != dvp); 1047 vrele(pn->pn_parent); 1048 } 1049 1050 vref(dvp); 1051 pn->pn_parent = dvp; 1052 } 1053 1054 int 1055 puffs_vnop_getattr(void *v) 1056 { 1057 struct vop_getattr_args /* { 1058 const struct vnodeop_desc *a_desc; 1059 struct vnode *a_vp; 1060 struct vattr *a_vap; 1061 kauth_cred_t a_cred; 1062 } */ *ap = v; 1063 PUFFS_MSG_VARS(vn, getattr); 1064 struct vnode *vp = ap->a_vp; 1065 struct mount *mp = vp->v_mount; 1066 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1067 struct vattr *vap, *rvap; 1068 struct puffs_node *pn = VPTOPP(vp); 1069 struct timespec *va_ttl = NULL; 1070 int error = 0; 1071 1072 /* 1073 * A lock is required so that we do not race with 1074 * setattr, write and fsync when changing vp->v_size. 1075 * This is critical, since setting a stall smaler value 1076 * triggers a file truncate in uvm_vnp_setsize(), which 1077 * most of the time means data corruption (a chunk of 1078 * data is replaced by zeroes). This can be removed if 1079 * we decide one day that VOP_GETATTR must operate on 1080 * a locked vnode. 1081 * 1082 * XXX Should be useless now that VOP_GETATTR has been 1083 * fixed to always require a shared lock at least. 1084 */ 1085 mutex_enter(&pn->pn_sizemtx); 1086 1087 REFPN(pn); 1088 vap = ap->a_vap; 1089 1090 if (PUFFS_USE_FS_TTL(pmp)) { 1091 if (!TIMED_OUT(pn->pn_va_timeout)) { 1092 update_va(vp, vap, pn->pn_va_cache, 1093 NULL, NULL, SETATTR_CHSIZE); 1094 goto out2; 1095 } 1096 } 1097 1098 PUFFS_MSG_ALLOC(vn, getattr); 1099 vattr_null(&getattr_msg->pvnr_va); 1100 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1101 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1102 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1103 1104 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1105 error = checkerr(pmp, error, __func__); 1106 if (error) 1107 goto out; 1108 1109 rvap = &getattr_msg->pvnr_va; 1110 1111 if (PUFFS_USE_FS_TTL(pmp)) 1112 va_ttl = &getattr_msg->pvnr_va_ttl; 1113 1114 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1115 1116 out: 1117 PUFFS_MSG_RELEASE(getattr); 1118 1119 out2: 1120 puffs_releasenode(pn); 1121 1122 mutex_exit(&pn->pn_sizemtx); 1123 1124 return error; 1125 } 1126 1127 static int 1128 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1129 { 1130 PUFFS_MSG_VARS(vn, setattr); 1131 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1132 struct puffs_node *pn = vp->v_data; 1133 int error = 0; 1134 1135 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1136 1137 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1138 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1139 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1140 || vap->va_mode != (mode_t)VNOVAL)) 1141 return EROFS; 1142 1143 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1144 && vp->v_type == VREG && vap->va_size != VNOVAL) 1145 return EROFS; 1146 1147 /* 1148 * Flush metacache first. If we are called with some explicit 1149 * parameters, treat them as information overriding metacache 1150 * information. 1151 */ 1152 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1153 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1154 && vap->va_atime.tv_sec == VNOVAL) 1155 vap->va_atime = pn->pn_mc_atime; 1156 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1157 && vap->va_ctime.tv_sec == VNOVAL) 1158 vap->va_ctime = pn->pn_mc_ctime; 1159 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1160 && vap->va_mtime.tv_sec == VNOVAL) 1161 vap->va_mtime = pn->pn_mc_mtime; 1162 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1163 && vap->va_size == VNOVAL) 1164 vap->va_size = pn->pn_mc_size; 1165 1166 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1167 } 1168 1169 /* 1170 * Flush attribute cache so that another thread do 1171 * not get a stale value during the operation. 1172 */ 1173 if (PUFFS_USE_FS_TTL(pmp)) 1174 pn->pn_va_timeout = 0; 1175 1176 PUFFS_MSG_ALLOC(vn, setattr); 1177 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1178 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1179 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1180 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1181 if (flags & SETATTR_ASYNC) 1182 puffs_msg_setfaf(park_setattr); 1183 1184 puffs_msg_enqueue(pmp, park_setattr); 1185 if ((flags & SETATTR_ASYNC) == 0) 1186 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1187 1188 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1189 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1190 struct vattr *rvap = &setattr_msg->pvnr_va; 1191 1192 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1193 } 1194 1195 PUFFS_MSG_RELEASE(setattr); 1196 if ((flags & SETATTR_ASYNC) == 0) { 1197 error = checkerr(pmp, error, __func__); 1198 if (error) 1199 return error; 1200 } else { 1201 error = 0; 1202 } 1203 1204 if (vap->va_size != VNOVAL) { 1205 pn->pn_serversize = vap->va_size; 1206 if (flags & SETATTR_CHSIZE) 1207 uvm_vnp_setsize(vp, vap->va_size); 1208 } 1209 1210 return 0; 1211 } 1212 1213 int 1214 puffs_vnop_setattr(void *v) 1215 { 1216 struct vop_getattr_args /* { 1217 const struct vnodeop_desc *a_desc; 1218 struct vnode *a_vp; 1219 struct vattr *a_vap; 1220 kauth_cred_t a_cred; 1221 } */ *ap = v; 1222 struct puffs_node *pn = ap->a_vp->v_data; 1223 int error; 1224 1225 mutex_enter(&pn->pn_sizemtx); 1226 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1227 mutex_exit(&pn->pn_sizemtx); 1228 1229 return error; 1230 } 1231 1232 static __inline int 1233 doinact(struct puffs_mount *pmp, int iaflag) 1234 { 1235 1236 if (EXISTSOP(pmp, INACTIVE)) 1237 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1238 if (iaflag || ALLOPS(pmp)) 1239 return 1; 1240 else 1241 return 0; 1242 else 1243 return 1; 1244 else 1245 return 0; 1246 } 1247 1248 static void 1249 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1250 { 1251 int error; 1252 PUFFS_MSG_VARS(vn, inactive); 1253 1254 if (doinact(pmp, iaflag)) { 1255 PUFFS_MSG_ALLOC(vn, inactive); 1256 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1257 PUFFS_VN_INACTIVE, ck); 1258 1259 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1260 PUFFS_MSG_RELEASE(inactive); 1261 } 1262 } 1263 1264 /* XXX: callinactive can't setback */ 1265 int 1266 puffs_vnop_inactive(void *v) 1267 { 1268 struct vop_inactive_args /* { 1269 const struct vnodeop_desc *a_desc; 1270 struct vnode *a_vp; 1271 } */ *ap = v; 1272 PUFFS_MSG_VARS(vn, inactive); 1273 struct vnode *vp = ap->a_vp; 1274 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1275 struct puffs_node *pnode; 1276 bool recycle = false; 1277 int error; 1278 1279 pnode = vp->v_data; 1280 mutex_enter(&pnode->pn_sizemtx); 1281 1282 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1283 flushvncache(vp, 0, 0, false); 1284 PUFFS_MSG_ALLOC(vn, inactive); 1285 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1286 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1287 1288 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1289 NULL, error); 1290 PUFFS_MSG_RELEASE(inactive); 1291 } 1292 pnode->pn_stat &= ~PNODE_DOINACT; 1293 1294 /* 1295 * file server thinks it's gone? then don't be afraid care, 1296 * node's life was already all it would ever be 1297 */ 1298 if (pnode->pn_stat & PNODE_NOREFS) { 1299 pnode->pn_stat |= PNODE_DYING; 1300 recycle = true; 1301 } 1302 1303 /* 1304 * Handle node TTL. 1305 * If grace has already timed out, make it reclaimed. 1306 * Otherwise, we queue its expiration by sop thread, so 1307 * that it does not remain for ages in the freelist, 1308 * holding memory in userspace, while we will have 1309 * to look it up again anyway. 1310 */ 1311 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1312 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1313 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1314 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1315 1316 if (!incache && !ingrace && !reclaimqueued) { 1317 pnode->pn_stat |= PNODE_DYING; 1318 recycle = true; 1319 } 1320 1321 if (!recycle && !reclaimqueued) { 1322 struct puffs_sopreq *psopr; 1323 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1324 1325 KASSERT(curlwp != uvm.pagedaemon_lwp); 1326 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1327 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1328 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1329 psopr->psopr_at = at; 1330 1331 mutex_enter(&pmp->pmp_sopmtx); 1332 1333 /* 1334 * If thread has disapeared, just give up. The 1335 * fs is being unmounted and the node will be 1336 * be reclaimed anyway. 1337 * 1338 * Otherwise, we queue the request but do not 1339 * immediatly signal the thread, as the node 1340 * has not been expired yet. 1341 */ 1342 if (pmp->pmp_sopthrcount == 0) { 1343 kmem_free(psopr, sizeof(*psopr)); 1344 } else { 1345 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1346 psopr, psopr_entries); 1347 pnode->pn_stat |= PNODE_SOPEXP; 1348 } 1349 1350 mutex_exit(&pmp->pmp_sopmtx); 1351 } 1352 } 1353 1354 *ap->a_recycle = recycle; 1355 1356 mutex_exit(&pnode->pn_sizemtx); 1357 VOP_UNLOCK(vp); 1358 1359 return 0; 1360 } 1361 1362 static void 1363 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1364 { 1365 PUFFS_MSG_VARS(vn, reclaim); 1366 1367 if (!EXISTSOP(pmp, RECLAIM)) 1368 return; 1369 1370 PUFFS_MSG_ALLOC(vn, reclaim); 1371 reclaim_msg->pvnr_nlookup = nlookup; 1372 puffs_msg_setfaf(park_reclaim); 1373 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1374 1375 puffs_msg_enqueue(pmp, park_reclaim); 1376 PUFFS_MSG_RELEASE(reclaim); 1377 return; 1378 } 1379 1380 /* 1381 * always FAF, we don't really care if the server wants to fail to 1382 * reclaim the node or not 1383 */ 1384 int 1385 puffs_vnop_reclaim(void *v) 1386 { 1387 struct vop_reclaim_args /* { 1388 const struct vnodeop_desc *a_desc; 1389 struct vnode *a_vp; 1390 } */ *ap = v; 1391 struct vnode *vp = ap->a_vp; 1392 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1393 struct puffs_node *pnode = vp->v_data; 1394 bool notifyserver = true; 1395 1396 /* 1397 * first things first: check if someone is trying to reclaim the 1398 * root vnode. do not allow that to travel to userspace. 1399 * Note that we don't need to take the lock similarly to 1400 * puffs_root(), since there is only one of us. 1401 */ 1402 if (vp->v_vflag & VV_ROOT) { 1403 mutex_enter(&pmp->pmp_lock); 1404 KASSERT(pmp->pmp_root != NULL); 1405 pmp->pmp_root = NULL; 1406 mutex_exit(&pmp->pmp_lock); 1407 notifyserver = false; 1408 } 1409 1410 /* 1411 * purge info from kernel before issueing FAF, since we 1412 * don't really know when we'll get around to it after 1413 * that and someone might race us into node creation 1414 */ 1415 mutex_enter(&pmp->pmp_lock); 1416 LIST_REMOVE(pnode, pn_hashent); 1417 if (PUFFS_USE_NAMECACHE(pmp)) 1418 cache_purge(vp); 1419 mutex_exit(&pmp->pmp_lock); 1420 1421 if (notifyserver) { 1422 int nlookup = VPTOPP(vp)->pn_nlookup; 1423 1424 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1425 } 1426 1427 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1428 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1429 vrele(VPTOPP(vp)->pn_parent); 1430 else 1431 KASSERT(vp->v_vflag & VV_ROOT); 1432 } 1433 1434 puffs_putvnode(vp); 1435 vp->v_data = NULL; 1436 1437 return 0; 1438 } 1439 1440 #define CSIZE sizeof(**ap->a_cookies) 1441 int 1442 puffs_vnop_readdir(void *v) 1443 { 1444 struct vop_readdir_args /* { 1445 const struct vnodeop_desc *a_desc; 1446 struct vnode *a_vp; 1447 struct uio *a_uio; 1448 kauth_cred_t a_cred; 1449 int *a_eofflag; 1450 off_t **a_cookies; 1451 int *a_ncookies; 1452 } */ *ap = v; 1453 PUFFS_MSG_VARS(vn, readdir); 1454 struct vnode *vp = ap->a_vp; 1455 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1456 size_t argsize, tomove, cookiemem, cookiesmax; 1457 struct uio *uio = ap->a_uio; 1458 size_t howmuch, resid; 1459 int error; 1460 1461 /* 1462 * ok, so we need: resid + cookiemem = maxreq 1463 * => resid + cookiesize * (resid/minsize) = maxreq 1464 * => resid + cookiesize/minsize * resid = maxreq 1465 * => (cookiesize/minsize + 1) * resid = maxreq 1466 * => resid = maxreq / (cookiesize/minsize + 1) 1467 * 1468 * Since cookiesize <= minsize and we're not very big on floats, 1469 * we approximate that to be 1. Therefore: 1470 * 1471 * resid = maxreq / 2; 1472 * 1473 * Well, at least we didn't have to use differential equations 1474 * or the Gram-Schmidt process. 1475 * 1476 * (yes, I'm very afraid of this) 1477 */ 1478 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1479 1480 if (ap->a_cookies) { 1481 KASSERT(ap->a_ncookies != NULL); 1482 if (pmp->pmp_args.pa_fhsize == 0) 1483 return EOPNOTSUPP; 1484 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1485 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1486 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1487 } else { 1488 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1489 cookiesmax = 0; 1490 cookiemem = 0; 1491 } 1492 1493 argsize = sizeof(struct puffs_vnmsg_readdir); 1494 tomove = resid + cookiemem; 1495 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1496 (void *)&readdir_msg, 1); 1497 1498 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1499 readdir_msg->pvnr_offset = uio->uio_offset; 1500 readdir_msg->pvnr_resid = resid; 1501 readdir_msg->pvnr_ncookies = cookiesmax; 1502 readdir_msg->pvnr_eofflag = 0; 1503 readdir_msg->pvnr_dentoff = cookiemem; 1504 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1505 PUFFS_VN_READDIR, VPTOPNC(vp)); 1506 puffs_msg_setdelta(park_readdir, tomove); 1507 1508 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1509 error = checkerr(pmp, error, __func__); 1510 if (error) 1511 goto out; 1512 1513 /* userspace is cheating? */ 1514 if (readdir_msg->pvnr_resid > resid) { 1515 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1516 "resid grew", VPTOPNC(vp)); 1517 ERROUT(EPROTO); 1518 } 1519 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1520 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1521 "too many cookies", VPTOPNC(vp)); 1522 ERROUT(EPROTO); 1523 } 1524 1525 /* check eof */ 1526 if (readdir_msg->pvnr_eofflag) 1527 *ap->a_eofflag = 1; 1528 1529 /* bouncy-wouncy with the directory data */ 1530 howmuch = resid - readdir_msg->pvnr_resid; 1531 1532 /* force eof if no data was returned (getcwd() needs this) */ 1533 if (howmuch == 0) { 1534 *ap->a_eofflag = 1; 1535 goto out; 1536 } 1537 1538 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1539 if (error) 1540 goto out; 1541 1542 /* provide cookies to caller if so desired */ 1543 if (ap->a_cookies) { 1544 KASSERT(curlwp != uvm.pagedaemon_lwp); 1545 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1546 M_TEMP, M_WAITOK); 1547 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1548 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1549 *ap->a_ncookies*CSIZE); 1550 } 1551 1552 /* next readdir starts here */ 1553 uio->uio_offset = readdir_msg->pvnr_offset; 1554 1555 out: 1556 puffs_msgmem_release(park_readdir); 1557 return error; 1558 } 1559 #undef CSIZE 1560 1561 /* 1562 * poll works by consuming the bitmask in pn_revents. If there are 1563 * events available, poll returns immediately. If not, it issues a 1564 * poll to userspace, selrecords itself and returns with no available 1565 * events. When the file server returns, it executes puffs_parkdone_poll(), 1566 * where available events are added to the bitmask. selnotify() is 1567 * then also executed by that function causing us to enter here again 1568 * and hopefully find the missing bits (unless someone got them first, 1569 * in which case it starts all over again). 1570 */ 1571 int 1572 puffs_vnop_poll(void *v) 1573 { 1574 struct vop_poll_args /* { 1575 const struct vnodeop_desc *a_desc; 1576 struct vnode *a_vp; 1577 int a_events; 1578 } */ *ap = v; 1579 PUFFS_MSG_VARS(vn, poll); 1580 struct vnode *vp = ap->a_vp; 1581 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1582 struct puffs_node *pn = vp->v_data; 1583 int events, error; 1584 1585 if (EXISTSOP(pmp, POLL)) { 1586 mutex_enter(&pn->pn_mtx); 1587 events = pn->pn_revents & ap->a_events; 1588 if (events & ap->a_events) { 1589 pn->pn_revents &= ~ap->a_events; 1590 mutex_exit(&pn->pn_mtx); 1591 1592 return events; 1593 } else { 1594 puffs_referencenode(pn); 1595 mutex_exit(&pn->pn_mtx); 1596 1597 PUFFS_MSG_ALLOC(vn, poll); 1598 poll_msg->pvnr_events = ap->a_events; 1599 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1600 PUFFS_VN_POLL, VPTOPNC(vp)); 1601 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1602 selrecord(curlwp, &pn->pn_sel); 1603 1604 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1605 NULL, error); 1606 PUFFS_MSG_RELEASE(poll); 1607 1608 return 0; 1609 } 1610 } else { 1611 return genfs_poll(v); 1612 } 1613 } 1614 1615 static int 1616 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1617 { 1618 struct puffs_node *pn = VPTOPP(vp); 1619 struct vattr va; 1620 int pflags, error; 1621 1622 /* flush out information from our metacache, see vop_setattr */ 1623 if (pn->pn_stat & PNODE_METACACHE_MASK 1624 && (pn->pn_stat & PNODE_DYING) == 0) { 1625 vattr_null(&va); 1626 error = dosetattr(vp, &va, FSCRED, 1627 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1628 if (error) 1629 return error; 1630 } 1631 1632 /* 1633 * flush pages to avoid being overly dirty 1634 */ 1635 pflags = PGO_CLEANIT; 1636 if (wait) 1637 pflags |= PGO_SYNCIO; 1638 1639 mutex_enter(vp->v_interlock); 1640 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1641 } 1642 1643 int 1644 puffs_vnop_fsync(void *v) 1645 { 1646 struct vop_fsync_args /* { 1647 const struct vnodeop_desc *a_desc; 1648 struct vnode *a_vp; 1649 kauth_cred_t a_cred; 1650 int a_flags; 1651 off_t a_offlo; 1652 off_t a_offhi; 1653 } */ *ap = v; 1654 PUFFS_MSG_VARS(vn, fsync); 1655 struct vnode *vp; 1656 struct puffs_node *pn; 1657 struct puffs_mount *pmp; 1658 int error, dofaf; 1659 1660 vp = ap->a_vp; 1661 KASSERT(vp != NULL); 1662 pn = VPTOPP(vp); 1663 KASSERT(pn != NULL); 1664 pmp = MPTOPUFFSMP(vp->v_mount); 1665 if (ap->a_flags & FSYNC_WAIT) { 1666 mutex_enter(&pn->pn_sizemtx); 1667 } else { 1668 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1669 return EDEADLK; 1670 } 1671 1672 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1673 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1674 if (error) 1675 goto out; 1676 1677 /* 1678 * HELLO! We exit already here if the user server does not 1679 * support fsync OR if we should call fsync for a node which 1680 * has references neither in the kernel or the fs server. 1681 * Otherwise we continue to issue fsync() forward. 1682 */ 1683 error = 0; 1684 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1685 goto out; 1686 1687 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1688 /* 1689 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1690 * only FAFs for those. Otherwise there's a danger of deadlock, 1691 * since the execution context here might be the user server 1692 * doing some operation on another fs, which in turn caused a 1693 * vnode to be reclaimed from the freelist for this fs. 1694 */ 1695 if (dofaf == 0) { 1696 mutex_enter(vp->v_interlock); 1697 if (vp->v_iflag & VI_XLOCK) 1698 dofaf = 1; 1699 mutex_exit(vp->v_interlock); 1700 } 1701 1702 PUFFS_MSG_ALLOC(vn, fsync); 1703 if (dofaf) 1704 puffs_msg_setfaf(park_fsync); 1705 1706 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1707 fsync_msg->pvnr_flags = ap->a_flags; 1708 fsync_msg->pvnr_offlo = ap->a_offlo; 1709 fsync_msg->pvnr_offhi = ap->a_offhi; 1710 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1711 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1712 1713 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1714 PUFFS_MSG_RELEASE(fsync); 1715 1716 error = checkerr(pmp, error, __func__); 1717 1718 out: 1719 mutex_exit(&pn->pn_sizemtx); 1720 return error; 1721 } 1722 1723 int 1724 puffs_vnop_seek(void *v) 1725 { 1726 struct vop_seek_args /* { 1727 const struct vnodeop_desc *a_desc; 1728 struct vnode *a_vp; 1729 off_t a_oldoff; 1730 off_t a_newoff; 1731 kauth_cred_t a_cred; 1732 } */ *ap = v; 1733 PUFFS_MSG_VARS(vn, seek); 1734 struct vnode *vp = ap->a_vp; 1735 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1736 int error; 1737 1738 PUFFS_MSG_ALLOC(vn, seek); 1739 seek_msg->pvnr_oldoff = ap->a_oldoff; 1740 seek_msg->pvnr_newoff = ap->a_newoff; 1741 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1742 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1743 PUFFS_VN_SEEK, VPTOPNC(vp)); 1744 1745 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1746 PUFFS_MSG_RELEASE(seek); 1747 return checkerr(pmp, error, __func__); 1748 } 1749 1750 static int 1751 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1752 struct componentname *cnp) 1753 { 1754 PUFFS_MSG_VARS(vn, remove); 1755 int error; 1756 1757 PUFFS_MSG_ALLOC(vn, remove); 1758 remove_msg->pvnr_cookie_targ = ck; 1759 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1760 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1761 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1762 1763 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1764 PUFFS_MSG_RELEASE(remove); 1765 1766 return checkerr(pmp, error, __func__); 1767 } 1768 1769 /* 1770 * XXX: can't use callremove now because can't catch setbacks with 1771 * it due to lack of a pnode argument. 1772 */ 1773 int 1774 puffs_vnop_remove(void *v) 1775 { 1776 struct vop_remove_args /* { 1777 const struct vnodeop_desc *a_desc; 1778 struct vnode *a_dvp; 1779 struct vnode *a_vp; 1780 struct componentname *a_cnp; 1781 } */ *ap = v; 1782 PUFFS_MSG_VARS(vn, remove); 1783 struct vnode *dvp = ap->a_dvp; 1784 struct vnode *vp = ap->a_vp; 1785 struct puffs_node *dpn = VPTOPP(dvp); 1786 struct puffs_node *pn = VPTOPP(vp); 1787 struct componentname *cnp = ap->a_cnp; 1788 struct mount *mp = dvp->v_mount; 1789 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1790 int error; 1791 1792 PUFFS_MSG_ALLOC(vn, remove); 1793 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1794 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1795 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1796 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1797 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1798 1799 puffs_msg_enqueue(pmp, park_remove); 1800 REFPN_AND_UNLOCKVP(dvp, dpn); 1801 if (dvp == vp) 1802 REFPN(pn); 1803 else 1804 REFPN_AND_UNLOCKVP(vp, pn); 1805 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1806 1807 PUFFS_MSG_RELEASE(remove); 1808 1809 RELEPN_AND_VP(dvp, dpn); 1810 RELEPN_AND_VP(vp, pn); 1811 1812 error = checkerr(pmp, error, __func__); 1813 return error; 1814 } 1815 1816 int 1817 puffs_vnop_mkdir(void *v) 1818 { 1819 struct vop_mkdir_args /* { 1820 const struct vnodeop_desc *a_desc; 1821 struct vnode *a_dvp; 1822 struct vnode **a_vpp; 1823 struct componentname *a_cnp; 1824 struct vattr *a_vap; 1825 } */ *ap = v; 1826 PUFFS_MSG_VARS(vn, mkdir); 1827 struct vnode *dvp = ap->a_dvp; 1828 struct puffs_node *dpn = VPTOPP(dvp); 1829 struct componentname *cnp = ap->a_cnp; 1830 struct mount *mp = dvp->v_mount; 1831 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1832 int error; 1833 1834 PUFFS_MSG_ALLOC(vn, mkdir); 1835 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1836 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1837 mkdir_msg->pvnr_va = *ap->a_vap; 1838 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1839 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1840 1841 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1842 1843 error = checkerr(pmp, error, __func__); 1844 if (error) 1845 goto out; 1846 1847 error = puffs_newnode(mp, dvp, ap->a_vpp, 1848 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1849 if (error) { 1850 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1851 mkdir_msg->pvnr_newnode, cnp); 1852 goto out; 1853 } 1854 1855 if (PUFFS_USE_FS_TTL(pmp)) { 1856 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1857 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1858 struct vattr *rvap = &mkdir_msg->pvnr_va; 1859 1860 update_va(*ap->a_vpp, NULL, rvap, 1861 va_ttl, cn_ttl, SETATTR_CHSIZE); 1862 } 1863 1864 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1865 1866 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1867 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1868 update_parent(*ap->a_vpp, dvp); 1869 1870 out: 1871 vput(dvp); 1872 PUFFS_MSG_RELEASE(mkdir); 1873 return error; 1874 } 1875 1876 static int 1877 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1878 struct componentname *cnp) 1879 { 1880 PUFFS_MSG_VARS(vn, rmdir); 1881 int error; 1882 1883 PUFFS_MSG_ALLOC(vn, rmdir); 1884 rmdir_msg->pvnr_cookie_targ = ck; 1885 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1886 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1887 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1888 1889 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1890 PUFFS_MSG_RELEASE(rmdir); 1891 1892 return checkerr(pmp, error, __func__); 1893 } 1894 1895 int 1896 puffs_vnop_rmdir(void *v) 1897 { 1898 struct vop_rmdir_args /* { 1899 const struct vnodeop_desc *a_desc; 1900 struct vnode *a_dvp; 1901 struct vnode *a_vp; 1902 struct componentname *a_cnp; 1903 } */ *ap = v; 1904 PUFFS_MSG_VARS(vn, rmdir); 1905 struct vnode *dvp = ap->a_dvp; 1906 struct vnode *vp = ap->a_vp; 1907 struct puffs_node *dpn = VPTOPP(dvp); 1908 struct puffs_node *pn = VPTOPP(vp); 1909 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1910 struct componentname *cnp = ap->a_cnp; 1911 int error; 1912 1913 PUFFS_MSG_ALLOC(vn, rmdir); 1914 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1915 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1916 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1917 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1918 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1919 1920 puffs_msg_enqueue(pmp, park_rmdir); 1921 REFPN_AND_UNLOCKVP(dvp, dpn); 1922 REFPN_AND_UNLOCKVP(vp, pn); 1923 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1924 1925 PUFFS_MSG_RELEASE(rmdir); 1926 1927 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1928 RELEPN_AND_VP(dvp, dpn); 1929 RELEPN_AND_VP(vp, pn); 1930 1931 return error; 1932 } 1933 1934 int 1935 puffs_vnop_link(void *v) 1936 { 1937 struct vop_link_args /* { 1938 const struct vnodeop_desc *a_desc; 1939 struct vnode *a_dvp; 1940 struct vnode *a_vp; 1941 struct componentname *a_cnp; 1942 } */ *ap = v; 1943 PUFFS_MSG_VARS(vn, link); 1944 struct vnode *dvp = ap->a_dvp; 1945 struct vnode *vp = ap->a_vp; 1946 struct puffs_node *dpn = VPTOPP(dvp); 1947 struct puffs_node *pn = VPTOPP(vp); 1948 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1949 struct componentname *cnp = ap->a_cnp; 1950 int error; 1951 1952 PUFFS_MSG_ALLOC(vn, link); 1953 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1954 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1955 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1956 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1957 PUFFS_VN_LINK, VPTOPNC(dvp)); 1958 1959 puffs_msg_enqueue(pmp, park_link); 1960 REFPN_AND_UNLOCKVP(dvp, dpn); 1961 REFPN(pn); 1962 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1963 1964 PUFFS_MSG_RELEASE(link); 1965 1966 error = checkerr(pmp, error, __func__); 1967 1968 /* 1969 * XXX: stay in touch with the cache. I don't like this, but 1970 * don't have a better solution either. See also puffs_rename(). 1971 */ 1972 if (error == 0) 1973 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1974 1975 RELEPN_AND_VP(dvp, dpn); 1976 puffs_releasenode(pn); 1977 1978 return error; 1979 } 1980 1981 int 1982 puffs_vnop_symlink(void *v) 1983 { 1984 struct vop_symlink_args /* { 1985 const struct vnodeop_desc *a_desc; 1986 struct vnode *a_dvp; 1987 struct vnode **a_vpp; 1988 struct componentname *a_cnp; 1989 struct vattr *a_vap; 1990 char *a_target; 1991 } */ *ap = v; 1992 PUFFS_MSG_VARS(vn, symlink); 1993 struct vnode *dvp = ap->a_dvp; 1994 struct puffs_node *dpn = VPTOPP(dvp); 1995 struct mount *mp = dvp->v_mount; 1996 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1997 struct componentname *cnp = ap->a_cnp; 1998 int error; 1999 2000 *ap->a_vpp = NULL; 2001 2002 PUFFS_MSG_ALLOC(vn, symlink); 2003 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2004 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2005 symlink_msg->pvnr_va = *ap->a_vap; 2006 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2007 sizeof(symlink_msg->pvnr_link)); 2008 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2009 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2010 2011 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2012 2013 error = checkerr(pmp, error, __func__); 2014 if (error) 2015 goto out; 2016 2017 error = puffs_newnode(mp, dvp, ap->a_vpp, 2018 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2019 if (error) { 2020 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2021 symlink_msg->pvnr_newnode, cnp); 2022 goto out; 2023 } 2024 2025 if (PUFFS_USE_FS_TTL(pmp)) { 2026 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2027 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2028 struct vattr *rvap = &symlink_msg->pvnr_va; 2029 2030 update_va(*ap->a_vpp, NULL, rvap, 2031 va_ttl, cn_ttl, SETATTR_CHSIZE); 2032 } 2033 2034 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2035 2036 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2037 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2038 update_parent(*ap->a_vpp, dvp); 2039 2040 out: 2041 vput(dvp); 2042 PUFFS_MSG_RELEASE(symlink); 2043 2044 return error; 2045 } 2046 2047 int 2048 puffs_vnop_readlink(void *v) 2049 { 2050 struct vop_readlink_args /* { 2051 const struct vnodeop_desc *a_desc; 2052 struct vnode *a_vp; 2053 struct uio *a_uio; 2054 kauth_cred_t a_cred; 2055 } */ *ap = v; 2056 PUFFS_MSG_VARS(vn, readlink); 2057 struct vnode *vp = ap->a_vp; 2058 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2059 size_t linklen; 2060 int error; 2061 2062 PUFFS_MSG_ALLOC(vn, readlink); 2063 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2064 linklen = sizeof(readlink_msg->pvnr_link); 2065 readlink_msg->pvnr_linklen = linklen; 2066 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2067 PUFFS_VN_READLINK, VPTOPNC(vp)); 2068 2069 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2070 error = checkerr(pmp, error, __func__); 2071 if (error) 2072 goto out; 2073 2074 /* bad bad user file server */ 2075 if (readlink_msg->pvnr_linklen > linklen) { 2076 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2077 "linklen too big", VPTOPNC(ap->a_vp)); 2078 error = EPROTO; 2079 goto out; 2080 } 2081 2082 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2083 ap->a_uio); 2084 out: 2085 PUFFS_MSG_RELEASE(readlink); 2086 return error; 2087 } 2088 2089 int 2090 puffs_vnop_rename(void *v) 2091 { 2092 struct vop_rename_args /* { 2093 const struct vnodeop_desc *a_desc; 2094 struct vnode *a_fdvp; 2095 struct vnode *a_fvp; 2096 struct componentname *a_fcnp; 2097 struct vnode *a_tdvp; 2098 struct vnode *a_tvp; 2099 struct componentname *a_tcnp; 2100 } */ *ap = v; 2101 PUFFS_MSG_VARS(vn, rename); 2102 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2103 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2104 struct puffs_node *fpn = ap->a_fvp->v_data; 2105 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2106 int error; 2107 bool doabort = true; 2108 2109 if ((fvp->v_mount != tdvp->v_mount) || 2110 (tvp && (fvp->v_mount != tvp->v_mount))) { 2111 ERROUT(EXDEV); 2112 } 2113 2114 PUFFS_MSG_ALLOC(vn, rename); 2115 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2116 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2117 if (tvp) 2118 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2119 else 2120 rename_msg->pvnr_cookie_targ = NULL; 2121 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2122 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2123 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2124 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2125 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2126 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2127 2128 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2129 doabort = false; 2130 PUFFS_MSG_RELEASE(rename); 2131 error = checkerr(pmp, error, __func__); 2132 2133 /* 2134 * XXX: stay in touch with the cache. I don't like this, but 2135 * don't have a better solution either. See also puffs_link(). 2136 */ 2137 if (error == 0) { 2138 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2139 2140 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2141 (VPTOPP(fvp)->pn_parent != tdvp)) 2142 update_parent(fvp, tdvp); 2143 } 2144 2145 2146 out: 2147 if (doabort) 2148 VOP_ABORTOP(tdvp, ap->a_tcnp); 2149 if (tvp != NULL) 2150 vput(tvp); 2151 if (tdvp == tvp) 2152 vrele(tdvp); 2153 else 2154 vput(tdvp); 2155 2156 if (doabort) 2157 VOP_ABORTOP(fdvp, ap->a_fcnp); 2158 vrele(fdvp); 2159 vrele(fvp); 2160 2161 return error; 2162 } 2163 2164 #define RWARGS(cont, iofl, move, offset, creds) \ 2165 (cont)->pvnr_ioflag = (iofl); \ 2166 (cont)->pvnr_resid = (move); \ 2167 (cont)->pvnr_offset = (offset); \ 2168 puffs_credcvt(&(cont)->pvnr_cred, creds) 2169 2170 int 2171 puffs_vnop_read(void *v) 2172 { 2173 struct vop_read_args /* { 2174 const struct vnodeop_desc *a_desc; 2175 struct vnode *a_vp; 2176 struct uio *a_uio; 2177 int a_ioflag; 2178 kauth_cred_t a_cred; 2179 } */ *ap = v; 2180 PUFFS_MSG_VARS(vn, read); 2181 struct vnode *vp = ap->a_vp; 2182 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2183 struct uio *uio = ap->a_uio; 2184 size_t tomove, argsize; 2185 vsize_t bytelen; 2186 int error; 2187 2188 read_msg = NULL; 2189 error = 0; 2190 2191 /* std sanity */ 2192 if (uio->uio_resid == 0) 2193 return 0; 2194 if (uio->uio_offset < 0) 2195 return EINVAL; 2196 2197 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2198 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2199 2200 while (uio->uio_resid > 0) { 2201 if (vp->v_size <= uio->uio_offset) { 2202 break; 2203 } 2204 bytelen = MIN(uio->uio_resid, 2205 vp->v_size - uio->uio_offset); 2206 if (bytelen == 0) 2207 break; 2208 2209 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2210 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2211 if (error) 2212 break; 2213 } 2214 2215 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2216 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2217 } else { 2218 /* 2219 * in case it's not a regular file or we're operating 2220 * uncached, do read in the old-fashioned style, 2221 * i.e. explicit read operations 2222 */ 2223 2224 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2225 argsize = sizeof(struct puffs_vnmsg_read); 2226 puffs_msgmem_alloc(argsize + tomove, &park_read, 2227 (void *)&read_msg, 1); 2228 2229 error = 0; 2230 while (uio->uio_resid > 0) { 2231 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2232 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2233 RWARGS(read_msg, ap->a_ioflag, tomove, 2234 uio->uio_offset, ap->a_cred); 2235 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2236 PUFFS_VN_READ, VPTOPNC(vp)); 2237 puffs_msg_setdelta(park_read, tomove); 2238 2239 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2240 NULL, error); 2241 error = checkerr(pmp, error, __func__); 2242 if (error) 2243 break; 2244 2245 if (read_msg->pvnr_resid > tomove) { 2246 puffs_senderr(pmp, PUFFS_ERR_READ, 2247 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2248 error = EPROTO; 2249 break; 2250 } 2251 2252 error = uiomove(read_msg->pvnr_data, 2253 tomove - read_msg->pvnr_resid, uio); 2254 2255 /* 2256 * in case the file is out of juice, resid from 2257 * userspace is != 0. and the error-case is 2258 * quite obvious 2259 */ 2260 if (error || read_msg->pvnr_resid) 2261 break; 2262 } 2263 2264 puffs_msgmem_release(park_read); 2265 } 2266 2267 return error; 2268 } 2269 2270 /* 2271 * XXX: in case of a failure, this leaves uio in a bad state. 2272 * We could theoretically copy the uio and iovecs and "replay" 2273 * them the right amount after the userspace trip, but don't 2274 * bother for now. 2275 */ 2276 int 2277 puffs_vnop_write(void *v) 2278 { 2279 struct vop_write_args /* { 2280 const struct vnodeop_desc *a_desc; 2281 struct vnode *a_vp; 2282 struct uio *a_uio; 2283 int a_ioflag; 2284 kauth_cred_t a_cred; 2285 } */ *ap = v; 2286 PUFFS_MSG_VARS(vn, write); 2287 struct vnode *vp = ap->a_vp; 2288 struct puffs_node *pn = VPTOPP(vp); 2289 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2290 struct uio *uio = ap->a_uio; 2291 size_t tomove, argsize; 2292 off_t oldoff, newoff, origoff; 2293 vsize_t bytelen; 2294 int error, uflags; 2295 int ubcflags; 2296 2297 error = uflags = 0; 2298 write_msg = NULL; 2299 2300 mutex_enter(&pn->pn_sizemtx); 2301 2302 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2303 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2304 2305 /* 2306 * userspace *should* be allowed to control this, 2307 * but with UBC it's a bit unclear how to handle it 2308 */ 2309 if (ap->a_ioflag & IO_APPEND) 2310 uio->uio_offset = vp->v_size; 2311 2312 origoff = uio->uio_offset; 2313 while (uio->uio_resid > 0) { 2314 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2315 uflags |= PUFFS_UPDATEATIME; 2316 uflags |= PUFFS_UPDATECTIME; 2317 uflags |= PUFFS_UPDATEMTIME; 2318 oldoff = uio->uio_offset; 2319 bytelen = uio->uio_resid; 2320 2321 newoff = oldoff + bytelen; 2322 if (vp->v_size < newoff) { 2323 uvm_vnp_setwritesize(vp, newoff); 2324 } 2325 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2326 UVM_ADV_RANDOM, ubcflags); 2327 2328 /* 2329 * In case of a ubc_uiomove() error, 2330 * opt to not extend the file at all and 2331 * return an error. Otherwise, if we attempt 2332 * to clear the memory we couldn't fault to, 2333 * we might generate a kernel page fault. 2334 */ 2335 if (vp->v_size < newoff) { 2336 if (error == 0) { 2337 uflags |= PUFFS_UPDATESIZE; 2338 uvm_vnp_setsize(vp, newoff); 2339 } else { 2340 uvm_vnp_setwritesize(vp, vp->v_size); 2341 } 2342 } 2343 if (error) 2344 break; 2345 2346 /* 2347 * If we're writing large files, flush to file server 2348 * every 64k. Otherwise we can very easily exhaust 2349 * kernel and user memory, as the file server cannot 2350 * really keep up with our writing speed. 2351 * 2352 * Note: this does *NOT* honor MNT_ASYNC, because 2353 * that gives userland too much say in the kernel. 2354 */ 2355 if (oldoff >> 16 != uio->uio_offset >> 16) { 2356 mutex_enter(vp->v_interlock); 2357 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2358 uio->uio_offset & ~0xffff, 2359 PGO_CLEANIT | PGO_SYNCIO); 2360 if (error) 2361 break; 2362 } 2363 } 2364 2365 /* synchronous I/O? */ 2366 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2367 mutex_enter(vp->v_interlock); 2368 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2369 round_page(uio->uio_offset), 2370 PGO_CLEANIT | PGO_SYNCIO); 2371 2372 /* write through page cache? */ 2373 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2374 mutex_enter(vp->v_interlock); 2375 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2376 round_page(uio->uio_offset), PGO_CLEANIT); 2377 } 2378 2379 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2380 } else { 2381 /* tomove is non-increasing */ 2382 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2383 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2384 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2385 2386 while (uio->uio_resid > 0) { 2387 /* move data to buffer */ 2388 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2389 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2390 RWARGS(write_msg, ap->a_ioflag, tomove, 2391 uio->uio_offset, ap->a_cred); 2392 error = uiomove(write_msg->pvnr_data, tomove, uio); 2393 if (error) 2394 break; 2395 2396 /* move buffer to userspace */ 2397 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2398 PUFFS_VN_WRITE, VPTOPNC(vp)); 2399 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2400 NULL, error); 2401 error = checkerr(pmp, error, __func__); 2402 if (error) 2403 break; 2404 2405 if (write_msg->pvnr_resid > tomove) { 2406 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2407 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2408 error = EPROTO; 2409 break; 2410 } 2411 2412 /* adjust file size */ 2413 if (vp->v_size < uio->uio_offset) 2414 uvm_vnp_setsize(vp, uio->uio_offset); 2415 2416 /* didn't move everything? bad userspace. bail */ 2417 if (write_msg->pvnr_resid != 0) { 2418 error = EIO; 2419 break; 2420 } 2421 } 2422 puffs_msgmem_release(park_write); 2423 } 2424 2425 mutex_exit(&pn->pn_sizemtx); 2426 return error; 2427 } 2428 2429 int 2430 puffs_vnop_print(void *v) 2431 { 2432 struct vop_print_args /* { 2433 struct vnode *a_vp; 2434 } */ *ap = v; 2435 PUFFS_MSG_VARS(vn, print); 2436 struct vnode *vp = ap->a_vp; 2437 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2438 struct puffs_node *pn = vp->v_data; 2439 int error; 2440 2441 /* kernel portion */ 2442 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2443 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2444 if (vp->v_type == VFIFO) 2445 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2446 printf("\n"); 2447 2448 /* userspace portion */ 2449 if (EXISTSOP(pmp, PRINT)) { 2450 PUFFS_MSG_ALLOC(vn, print); 2451 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2452 PUFFS_VN_PRINT, VPTOPNC(vp)); 2453 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2454 NULL, error); 2455 PUFFS_MSG_RELEASE(print); 2456 } 2457 2458 return 0; 2459 } 2460 2461 int 2462 puffs_vnop_pathconf(void *v) 2463 { 2464 struct vop_pathconf_args /* { 2465 const struct vnodeop_desc *a_desc; 2466 struct vnode *a_vp; 2467 int a_name; 2468 register_t *a_retval; 2469 } */ *ap = v; 2470 PUFFS_MSG_VARS(vn, pathconf); 2471 struct vnode *vp = ap->a_vp; 2472 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2473 int error; 2474 2475 PUFFS_MSG_ALLOC(vn, pathconf); 2476 pathconf_msg->pvnr_name = ap->a_name; 2477 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2478 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2479 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2480 error = checkerr(pmp, error, __func__); 2481 if (!error) 2482 *ap->a_retval = pathconf_msg->pvnr_retval; 2483 PUFFS_MSG_RELEASE(pathconf); 2484 2485 return error; 2486 } 2487 2488 int 2489 puffs_vnop_advlock(void *v) 2490 { 2491 struct vop_advlock_args /* { 2492 const struct vnodeop_desc *a_desc; 2493 struct vnode *a_vp; 2494 void *a_id; 2495 int a_op; 2496 struct flock *a_fl; 2497 int a_flags; 2498 } */ *ap = v; 2499 PUFFS_MSG_VARS(vn, advlock); 2500 struct vnode *vp = ap->a_vp; 2501 struct puffs_node *pn = VPTOPP(vp); 2502 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2503 int error; 2504 2505 if (!EXISTSOP(pmp, ADVLOCK)) 2506 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2507 2508 PUFFS_MSG_ALLOC(vn, advlock); 2509 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2510 sizeof(advlock_msg->pvnr_fl)); 2511 advlock_msg->pvnr_id = ap->a_id; 2512 advlock_msg->pvnr_op = ap->a_op; 2513 advlock_msg->pvnr_flags = ap->a_flags; 2514 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2515 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2516 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2517 error = checkerr(pmp, error, __func__); 2518 PUFFS_MSG_RELEASE(advlock); 2519 2520 return error; 2521 } 2522 2523 int 2524 puffs_vnop_abortop(void *v) 2525 { 2526 struct vop_abortop_args /* { 2527 struct vnode *a_dvp; 2528 struct componentname *a_cnp; 2529 }; */ *ap = v; 2530 PUFFS_MSG_VARS(vn, abortop); 2531 struct vnode *dvp = ap->a_dvp; 2532 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2533 struct componentname *cnp = ap->a_cnp; 2534 2535 if (EXISTSOP(pmp, ABORTOP)) { 2536 PUFFS_MSG_ALLOC(vn, abortop); 2537 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2538 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2539 puffs_msg_setfaf(park_abortop); 2540 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2541 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2542 2543 puffs_msg_enqueue(pmp, park_abortop); 2544 PUFFS_MSG_RELEASE(abortop); 2545 } 2546 2547 return genfs_abortop(v); 2548 } 2549 2550 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2551 2552 /* 2553 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2554 */ 2555 int 2556 puffs_vnop_strategy(void *v) 2557 { 2558 struct vop_strategy_args /* { 2559 const struct vnodeop_desc *a_desc; 2560 struct vnode *a_vp; 2561 struct buf *a_bp; 2562 } */ *ap = v; 2563 PUFFS_MSG_VARS(vn, rw); 2564 struct vnode *vp = ap->a_vp; 2565 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2566 struct puffs_node *pn; 2567 struct buf *bp; 2568 size_t argsize; 2569 size_t tomove, moved; 2570 int error, dofaf, cansleep, dobiodone; 2571 2572 pmp = MPTOPUFFSMP(vp->v_mount); 2573 bp = ap->a_bp; 2574 error = 0; 2575 dofaf = 0; 2576 cansleep = 0; 2577 pn = VPTOPP(vp); 2578 park_rw = NULL; /* explicit */ 2579 dobiodone = 1; 2580 2581 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2582 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2583 ERROUT(EOPNOTSUPP); 2584 2585 /* 2586 * Short-circuit optimization: don't flush buffer in between 2587 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2588 */ 2589 if (pn->pn_stat & PNODE_DYING) { 2590 KASSERT(BUF_ISWRITE(bp)); 2591 bp->b_resid = 0; 2592 goto out; 2593 } 2594 2595 #ifdef DIAGNOSTIC 2596 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2597 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2598 bp->b_bcount); 2599 #endif 2600 2601 /* 2602 * See explanation for the necessity of a FAF in puffs_fsync. 2603 * 2604 * Also, do FAF in case we're suspending. 2605 * See puffs_vfsops.c:pageflush() 2606 */ 2607 if (BUF_ISWRITE(bp)) { 2608 mutex_enter(vp->v_interlock); 2609 if (vp->v_iflag & VI_XLOCK) 2610 dofaf = 1; 2611 if (pn->pn_stat & PNODE_FAF) 2612 dofaf = 1; 2613 mutex_exit(vp->v_interlock); 2614 } 2615 2616 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2617 2618 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2619 2620 /* allocate transport structure */ 2621 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2622 argsize = sizeof(struct puffs_vnmsg_rw); 2623 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2624 (void *)&rw_msg, cansleep); 2625 if (error) 2626 goto out; 2627 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2628 2629 /* 2x2 cases: read/write, faf/nofaf */ 2630 if (BUF_ISREAD(bp)) { 2631 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2632 PUFFS_VN_READ, VPTOPNC(vp)); 2633 puffs_msg_setdelta(park_rw, tomove); 2634 if (BIOASYNC(bp)) { 2635 puffs_msg_setcall(park_rw, 2636 puffs_parkdone_asyncbioread, bp); 2637 puffs_msg_enqueue(pmp, park_rw); 2638 dobiodone = 0; 2639 } else { 2640 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2641 NULL, error); 2642 error = checkerr(pmp, error, __func__); 2643 if (error) 2644 goto out; 2645 2646 if (rw_msg->pvnr_resid > tomove) { 2647 puffs_senderr(pmp, PUFFS_ERR_READ, 2648 E2BIG, "resid grew", VPTOPNC(vp)); 2649 ERROUT(EPROTO); 2650 } 2651 2652 moved = tomove - rw_msg->pvnr_resid; 2653 2654 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2655 bp->b_resid = bp->b_bcount - moved; 2656 } 2657 } else { 2658 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2659 PUFFS_VN_WRITE, VPTOPNC(vp)); 2660 /* 2661 * make pages read-only before we write them if we want 2662 * write caching info 2663 */ 2664 if (PUFFS_WCACHEINFO(pmp)) { 2665 struct uvm_object *uobj = &vp->v_uobj; 2666 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2667 struct vm_page *vmp; 2668 int i; 2669 2670 for (i = 0; i < npages; i++) { 2671 vmp= uvm_pageratop((vaddr_t)bp->b_data 2672 + (i << PAGE_SHIFT)); 2673 DPRINTF(("puffs_strategy: write-protecting " 2674 "vp %p page %p, offset %" PRId64"\n", 2675 vp, vmp, vmp->offset)); 2676 mutex_enter(uobj->vmobjlock); 2677 vmp->flags |= PG_RDONLY; 2678 pmap_page_protect(vmp, VM_PROT_READ); 2679 mutex_exit(uobj->vmobjlock); 2680 } 2681 } 2682 2683 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2684 if (dofaf) { 2685 puffs_msg_setfaf(park_rw); 2686 } else if (BIOASYNC(bp)) { 2687 puffs_msg_setcall(park_rw, 2688 puffs_parkdone_asyncbiowrite, bp); 2689 dobiodone = 0; 2690 } 2691 2692 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2693 2694 if (dobiodone == 0) 2695 goto out; 2696 2697 /* 2698 * XXXXXXXX: wrong, but kernel can't survive strategy 2699 * failure currently. Here, have one more X: X. 2700 */ 2701 if (error != ENOMEM) 2702 error = 0; 2703 2704 error = checkerr(pmp, error, __func__); 2705 if (error) 2706 goto out; 2707 2708 if (rw_msg->pvnr_resid > tomove) { 2709 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2710 E2BIG, "resid grew", VPTOPNC(vp)); 2711 ERROUT(EPROTO); 2712 } 2713 2714 /* 2715 * FAF moved everything. Frankly, we don't 2716 * really have a choice. 2717 */ 2718 if (dofaf && error == 0) 2719 moved = tomove; 2720 else 2721 moved = tomove - rw_msg->pvnr_resid; 2722 2723 bp->b_resid = bp->b_bcount - moved; 2724 if (bp->b_resid != 0) { 2725 ERROUT(EIO); 2726 } 2727 } 2728 2729 out: 2730 if (park_rw) 2731 puffs_msgmem_release(park_rw); 2732 2733 if (error) 2734 bp->b_error = error; 2735 2736 if (error || dobiodone) 2737 biodone(bp); 2738 2739 return error; 2740 } 2741 2742 int 2743 puffs_vnop_mmap(void *v) 2744 { 2745 struct vop_mmap_args /* { 2746 const struct vnodeop_desc *a_desc; 2747 struct vnode *a_vp; 2748 vm_prot_t a_prot; 2749 kauth_cred_t a_cred; 2750 } */ *ap = v; 2751 PUFFS_MSG_VARS(vn, mmap); 2752 struct vnode *vp = ap->a_vp; 2753 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2754 int error; 2755 2756 if (!PUFFS_USE_PAGECACHE(pmp)) 2757 return genfs_eopnotsupp(v); 2758 2759 if (EXISTSOP(pmp, MMAP)) { 2760 PUFFS_MSG_ALLOC(vn, mmap); 2761 mmap_msg->pvnr_prot = ap->a_prot; 2762 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2763 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2764 PUFFS_VN_MMAP, VPTOPNC(vp)); 2765 2766 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2767 error = checkerr(pmp, error, __func__); 2768 PUFFS_MSG_RELEASE(mmap); 2769 } else { 2770 error = genfs_mmap(v); 2771 } 2772 2773 return error; 2774 } 2775 2776 2777 /* 2778 * The rest don't get a free trip to userspace and back, they 2779 * have to stay within the kernel. 2780 */ 2781 2782 /* 2783 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2784 * well, maybe somehow, somewhere, some day .... 2785 */ 2786 int 2787 puffs_vnop_bmap(void *v) 2788 { 2789 struct vop_bmap_args /* { 2790 const struct vnodeop_desc *a_desc; 2791 struct vnode *a_vp; 2792 daddr_t a_bn; 2793 struct vnode **a_vpp; 2794 daddr_t *a_bnp; 2795 int *a_runp; 2796 } */ *ap = v; 2797 struct puffs_mount *pmp; 2798 2799 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2800 2801 if (ap->a_vpp) 2802 *ap->a_vpp = ap->a_vp; 2803 if (ap->a_bnp) 2804 *ap->a_bnp = ap->a_bn; 2805 if (ap->a_runp) 2806 *ap->a_runp 2807 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2808 2809 return 0; 2810 } 2811 2812 /* 2813 * Handle getpages faults in puffs. We let genfs_getpages() do most 2814 * of the dirty work, but we come in this route to do accounting tasks. 2815 * If the user server has specified functions for cache notifications 2816 * about reads and/or writes, we record which type of operation we got, 2817 * for which page range, and proceed to issue a FAF notification to the 2818 * server about it. 2819 */ 2820 int 2821 puffs_vnop_getpages(void *v) 2822 { 2823 struct vop_getpages_args /* { 2824 const struct vnodeop_desc *a_desc; 2825 struct vnode *a_vp; 2826 voff_t a_offset; 2827 struct vm_page **a_m; 2828 int *a_count; 2829 int a_centeridx; 2830 vm_prot_t a_access_type; 2831 int a_advice; 2832 int a_flags; 2833 } */ *ap = v; 2834 struct puffs_mount *pmp; 2835 struct puffs_node *pn; 2836 struct vnode *vp; 2837 struct vm_page **pgs; 2838 struct puffs_cacheinfo *pcinfo = NULL; 2839 struct puffs_cacherun *pcrun; 2840 void *parkmem = NULL; 2841 size_t runsizes; 2842 int i, npages, si, streakon; 2843 int error, locked, write; 2844 2845 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2846 npages = *ap->a_count; 2847 pgs = ap->a_m; 2848 vp = ap->a_vp; 2849 pn = vp->v_data; 2850 locked = (ap->a_flags & PGO_LOCKED) != 0; 2851 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2852 2853 /* ccg xnaht - gets Wuninitialized wrong */ 2854 pcrun = NULL; 2855 runsizes = 0; 2856 2857 /* 2858 * Check that we aren't trying to fault in pages which our file 2859 * server doesn't know about. This happens if we extend a file by 2860 * skipping some pages and later try to fault in pages which 2861 * are between pn_serversize and vp_size. This check optimizes 2862 * away the common case where a file is being extended. 2863 */ 2864 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2865 struct vattr va; 2866 2867 /* try again later when we can block */ 2868 if (locked) 2869 ERROUT(EBUSY); 2870 2871 mutex_exit(vp->v_interlock); 2872 vattr_null(&va); 2873 va.va_size = vp->v_size; 2874 error = dosetattr(vp, &va, FSCRED, 0); 2875 if (error) 2876 ERROUT(error); 2877 mutex_enter(vp->v_interlock); 2878 } 2879 2880 if (write && PUFFS_WCACHEINFO(pmp)) { 2881 #ifdef notnowjohn 2882 /* allocate worst-case memory */ 2883 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2884 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2885 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2886 locked ? KM_NOSLEEP : KM_SLEEP); 2887 2888 /* 2889 * can't block if we're locked and can't mess up caching 2890 * information for fs server. so come back later, please 2891 */ 2892 if (pcinfo == NULL) 2893 ERROUT(ENOMEM); 2894 2895 parkmem = puffs_park_alloc(locked == 0); 2896 if (parkmem == NULL) 2897 ERROUT(ENOMEM); 2898 2899 pcrun = pcinfo->pcache_runs; 2900 #else 2901 (void)parkmem; 2902 #endif 2903 } 2904 2905 error = genfs_getpages(v); 2906 if (error) 2907 goto out; 2908 2909 if (PUFFS_WCACHEINFO(pmp) == 0) 2910 goto out; 2911 2912 /* 2913 * Let's see whose fault it was and inform the user server of 2914 * possibly read/written pages. Map pages from read faults 2915 * strictly read-only, since otherwise we might miss info on 2916 * when the page is actually write-faulted to. 2917 */ 2918 if (!locked) 2919 mutex_enter(vp->v_uobj.vmobjlock); 2920 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2921 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2922 if (streakon && write) { 2923 streakon = 0; 2924 pcrun[si].pcache_runend 2925 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2926 si++; 2927 } 2928 continue; 2929 } 2930 if (streakon == 0 && write) { 2931 streakon = 1; 2932 pcrun[si].pcache_runstart = pgs[i]->offset; 2933 } 2934 2935 if (!write) 2936 pgs[i]->flags |= PG_RDONLY; 2937 } 2938 /* was the last page part of our streak? */ 2939 if (streakon) { 2940 pcrun[si].pcache_runend 2941 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2942 si++; 2943 } 2944 if (!locked) 2945 mutex_exit(vp->v_uobj.vmobjlock); 2946 2947 KASSERT(si <= (npages / 2) + 1); 2948 2949 #ifdef notnowjohn 2950 /* send results to userspace */ 2951 if (write) 2952 puffs_cacheop(pmp, parkmem, pcinfo, 2953 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2954 #endif 2955 2956 out: 2957 if (error) { 2958 if (pcinfo != NULL) 2959 kmem_free(pcinfo, 2960 sizeof(struct puffs_cacheinfo) + runsizes); 2961 #ifdef notnowjohn 2962 if (parkmem != NULL) 2963 puffs_park_release(parkmem, 1); 2964 #endif 2965 } 2966 2967 return error; 2968 } 2969 2970 /* 2971 * Extended attribute support. 2972 */ 2973 2974 int 2975 puffs_vnop_getextattr(void *v) 2976 { 2977 struct vop_getextattr_args /* 2978 struct vnode *a_vp; 2979 int a_attrnamespace; 2980 const char *a_name; 2981 struct uio *a_uio; 2982 size_t *a_size; 2983 kauth_cred_t a_cred; 2984 }; */ *ap = v; 2985 PUFFS_MSG_VARS(vn, getextattr); 2986 struct vnode *vp = ap->a_vp; 2987 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2988 int attrnamespace = ap->a_attrnamespace; 2989 const char *name = ap->a_name; 2990 struct uio *uio = ap->a_uio; 2991 size_t *sizep = ap->a_size; 2992 size_t tomove, resid; 2993 int error; 2994 2995 if (uio) 2996 resid = uio->uio_resid; 2997 else 2998 resid = 0; 2999 3000 tomove = PUFFS_TOMOVE(resid, pmp); 3001 if (tomove != resid) { 3002 error = E2BIG; 3003 goto out; 3004 } 3005 3006 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3007 &park_getextattr, (void *)&getextattr_msg, 1); 3008 3009 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3010 strlcpy(getextattr_msg->pvnr_attrname, name, 3011 sizeof(getextattr_msg->pvnr_attrname)); 3012 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3013 if (sizep) 3014 getextattr_msg->pvnr_datasize = 1; 3015 getextattr_msg->pvnr_resid = tomove; 3016 3017 puffs_msg_setinfo(park_getextattr, 3018 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3019 puffs_msg_setdelta(park_getextattr, tomove); 3020 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3021 3022 error = checkerr(pmp, error, __func__); 3023 if (error) 3024 goto out; 3025 3026 resid = getextattr_msg->pvnr_resid; 3027 if (resid > tomove) { 3028 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3029 "resid grew", VPTOPNC(vp)); 3030 error = EPROTO; 3031 goto out; 3032 } 3033 3034 if (sizep) 3035 *sizep = getextattr_msg->pvnr_datasize; 3036 if (uio) 3037 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3038 3039 out: 3040 PUFFS_MSG_RELEASE(getextattr); 3041 return error; 3042 } 3043 3044 int 3045 puffs_vnop_setextattr(void *v) 3046 { 3047 struct vop_setextattr_args /* { 3048 struct vnode *a_vp; 3049 int a_attrnamespace; 3050 const char *a_name; 3051 struct uio *a_uio; 3052 kauth_cred_t a_cred; 3053 }; */ *ap = v; 3054 PUFFS_MSG_VARS(vn, setextattr); 3055 struct vnode *vp = ap->a_vp; 3056 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3057 int attrnamespace = ap->a_attrnamespace; 3058 const char *name = ap->a_name; 3059 struct uio *uio = ap->a_uio; 3060 size_t tomove, resid; 3061 int error; 3062 3063 if (uio) 3064 resid = uio->uio_resid; 3065 else 3066 resid = 0; 3067 3068 tomove = PUFFS_TOMOVE(resid, pmp); 3069 if (tomove != resid) { 3070 error = E2BIG; 3071 goto out; 3072 } 3073 3074 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3075 &park_setextattr, (void *)&setextattr_msg, 1); 3076 3077 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3078 strlcpy(setextattr_msg->pvnr_attrname, name, 3079 sizeof(setextattr_msg->pvnr_attrname)); 3080 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3081 setextattr_msg->pvnr_resid = tomove; 3082 3083 if (uio) { 3084 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3085 if (error) 3086 goto out; 3087 } 3088 3089 puffs_msg_setinfo(park_setextattr, 3090 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3091 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3092 3093 error = checkerr(pmp, error, __func__); 3094 if (error) 3095 goto out; 3096 3097 if (setextattr_msg->pvnr_resid != 0) 3098 error = EIO; 3099 3100 out: 3101 PUFFS_MSG_RELEASE(setextattr); 3102 3103 return error; 3104 } 3105 3106 int 3107 puffs_vnop_listextattr(void *v) 3108 { 3109 struct vop_listextattr_args /* { 3110 struct vnode *a_vp; 3111 int a_attrnamespace; 3112 struct uio *a_uio; 3113 size_t *a_size; 3114 int a_flag, 3115 kauth_cred_t a_cred; 3116 }; */ *ap = v; 3117 PUFFS_MSG_VARS(vn, listextattr); 3118 struct vnode *vp = ap->a_vp; 3119 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3120 int attrnamespace = ap->a_attrnamespace; 3121 struct uio *uio = ap->a_uio; 3122 size_t *sizep = ap->a_size; 3123 int flag = ap->a_flag; 3124 size_t tomove, resid; 3125 int error; 3126 3127 if (uio) 3128 resid = uio->uio_resid; 3129 else 3130 resid = 0; 3131 3132 tomove = PUFFS_TOMOVE(resid, pmp); 3133 if (tomove != resid) { 3134 error = E2BIG; 3135 goto out; 3136 } 3137 3138 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3139 &park_listextattr, (void *)&listextattr_msg, 1); 3140 3141 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3142 listextattr_msg->pvnr_flag = flag; 3143 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3144 listextattr_msg->pvnr_resid = tomove; 3145 if (sizep) 3146 listextattr_msg->pvnr_datasize = 1; 3147 3148 puffs_msg_setinfo(park_listextattr, 3149 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3150 puffs_msg_setdelta(park_listextattr, tomove); 3151 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3152 3153 error = checkerr(pmp, error, __func__); 3154 if (error) 3155 goto out; 3156 3157 resid = listextattr_msg->pvnr_resid; 3158 if (resid > tomove) { 3159 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3160 "resid grew", VPTOPNC(vp)); 3161 error = EPROTO; 3162 goto out; 3163 } 3164 3165 if (sizep) 3166 *sizep = listextattr_msg->pvnr_datasize; 3167 if (uio) 3168 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3169 3170 out: 3171 PUFFS_MSG_RELEASE(listextattr); 3172 return error; 3173 } 3174 3175 int 3176 puffs_vnop_deleteextattr(void *v) 3177 { 3178 struct vop_deleteextattr_args /* { 3179 struct vnode *a_vp; 3180 int a_attrnamespace; 3181 const char *a_name; 3182 kauth_cred_t a_cred; 3183 }; */ *ap = v; 3184 PUFFS_MSG_VARS(vn, deleteextattr); 3185 struct vnode *vp = ap->a_vp; 3186 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3187 int attrnamespace = ap->a_attrnamespace; 3188 const char *name = ap->a_name; 3189 int error; 3190 3191 PUFFS_MSG_ALLOC(vn, deleteextattr); 3192 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3193 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3194 sizeof(deleteextattr_msg->pvnr_attrname)); 3195 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3196 3197 puffs_msg_setinfo(park_deleteextattr, 3198 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3199 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3200 vp->v_data, NULL, error); 3201 3202 error = checkerr(pmp, error, __func__); 3203 3204 PUFFS_MSG_RELEASE(deleteextattr); 3205 return error; 3206 } 3207 3208 /* 3209 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3210 * FAF update information for the puffs node first. 3211 */ 3212 int 3213 puffs_vnop_spec_read(void *v) 3214 { 3215 struct vop_read_args /* { 3216 const struct vnodeop_desc *a_desc; 3217 struct vnode *a_vp; 3218 struct uio *a_uio; 3219 int a_ioflag; 3220 kauth_cred_t a_cred; 3221 } */ *ap = v; 3222 3223 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3224 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3225 } 3226 3227 int 3228 puffs_vnop_spec_write(void *v) 3229 { 3230 struct vop_write_args /* { 3231 const struct vnodeop_desc *a_desc; 3232 struct vnode *a_vp; 3233 struct uio *a_uio; 3234 int a_ioflag; 3235 kauth_cred_t a_cred; 3236 } */ *ap = v; 3237 3238 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3239 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3240 } 3241 3242 int 3243 puffs_vnop_fifo_read(void *v) 3244 { 3245 struct vop_read_args /* { 3246 const struct vnodeop_desc *a_desc; 3247 struct vnode *a_vp; 3248 struct uio *a_uio; 3249 int a_ioflag; 3250 kauth_cred_t a_cred; 3251 } */ *ap = v; 3252 3253 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3254 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3255 } 3256 3257 int 3258 puffs_vnop_fifo_write(void *v) 3259 { 3260 struct vop_write_args /* { 3261 const struct vnodeop_desc *a_desc; 3262 struct vnode *a_vp; 3263 struct uio *a_uio; 3264 int a_ioflag; 3265 kauth_cred_t a_cred; 3266 } */ *ap = v; 3267 3268 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3269 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3270 } 3271
Indexes created Tue Sep 30 17:09:57 GMT 2025