puffs_vnops.c revision 1.176
1 /* $NetBSD: puffs_vnops.c,v 1.176 2012/11/05 17:27:38 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 1.176 2012/11/05 17:27:38 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->cn_nameptr, cnp->cn_namelen, 532 cnp->cn_nameiop, cnp->cn_flags, 533 &iswhiteout, ap->a_vpp); 534 if (iswhiteout) { 535 cnp->cn_flags |= ISWHITEOUT; 536 } 537 538 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 539 cvp = *ap->a_vpp; 540 cpn = VPTOPP(cvp); 541 542 if (TIMED_OUT(cpn->pn_cn_timeout)) { 543 cache_purge(cvp); 544 /* 545 * cached vnode (cvp) is still locked 546 * so that we can reuse it upon a new 547 * successful lookup. 548 */ 549 *ap->a_vpp = NULL; 550 found = 0; 551 } 552 } 553 554 /* 555 * Do not use negative caching, since the filesystem 556 * provides no TTL for it. 557 */ 558 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 559 found = 0; 560 561 if (found) { 562 return *ap->a_vpp == NULLVP ? ENOENT : 0; 563 } 564 565 /* 566 * This is what would have been left in ERROR before 567 * the rearrangement of cache_lookup(). What with all 568 * the macros, I am not sure if this is a dead value 569 * below or not. 570 */ 571 error = -1; 572 } 573 574 if (isdot) { 575 /* deal with rename lookup semantics */ 576 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 577 return EISDIR; 578 579 vp = ap->a_dvp; 580 vref(vp); 581 *ap->a_vpp = vp; 582 return 0; 583 } 584 585 if (cvp != NULL) 586 mutex_enter(&cpn->pn_sizemtx); 587 588 PUFFS_MSG_ALLOC(vn, lookup); 589 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 590 cnp, PUFFS_USE_FULLPNBUF(pmp)); 591 592 if (cnp->cn_flags & ISDOTDOT) 593 VOP_UNLOCK(dvp); 594 595 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 596 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 597 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 598 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 599 600 /* 601 * In case of error, there is no new vnode to play with, so be 602 * happy with the NULL value given to vpp in the beginning. 603 * Also, check if this really was an error or the target was not 604 * present. Either treat it as a non-error for CREATE/RENAME or 605 * enter the component into the negative name cache (if desired). 606 */ 607 if (error) { 608 error = checkerr(pmp, error, __func__); 609 if (error == ENOENT) { 610 /* don't allow to create files on r/o fs */ 611 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 612 && cnp->cn_nameiop == CREATE) { 613 error = EROFS; 614 615 /* adjust values if we are creating */ 616 } else if ((cnp->cn_flags & ISLASTCN) 617 && (cnp->cn_nameiop == CREATE 618 || cnp->cn_nameiop == RENAME)) { 619 error = EJUSTRETURN; 620 621 /* save negative cache entry */ 622 } else { 623 if (PUFFS_USE_NAMECACHE(pmp) && 624 !PUFFS_USE_FS_TTL(pmp)) 625 cache_enter(dvp, NULL, cnp->cn_nameptr, 626 cnp->cn_namelen, cnp->cn_flags); 627 } 628 } 629 goto out; 630 } 631 632 /* 633 * Check that we don't get our parent node back, that would cause 634 * a pretty obvious deadlock. 635 */ 636 dpn = dvp->v_data; 637 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 638 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 639 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 640 error = EPROTO; 641 goto out; 642 } 643 644 /* 645 * Check if we looked up the cached vnode 646 */ 647 vp = NULL; 648 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 649 int grace; 650 651 /* 652 * Bump grace time of this node so that it does not get 653 * reclaimed too fast. We try to increase a bit more the 654 * lifetime of busiest * nodes - with some limits. 655 */ 656 grace = 10 * puffs_sopreq_expire_timeout; 657 cpn->pn_cn_grace = hardclock_ticks + grace; 658 vp = cvp; 659 } 660 661 /* 662 * No cached vnode available, or the cached vnode does not 663 * match the userland cookie anymore: is the node known? 664 */ 665 if (vp == NULL) { 666 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 667 1, 1, &vp); 668 } 669 670 if (error == PUFFS_NOSUCHCOOKIE) { 671 error = puffs_getvnode(dvp->v_mount, 672 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 673 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 674 if (error) { 675 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 676 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 677 ap->a_cnp); 678 goto out; 679 } 680 681 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 682 } else if (error) { 683 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 684 lookup_msg->pvnr_newnode, ap->a_cnp); 685 goto out; 686 } 687 688 /* 689 * Update cache and TTL 690 */ 691 if (PUFFS_USE_FS_TTL(pmp)) { 692 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 693 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 694 update_va(vp, NULL, &lookup_msg->pvnr_va, 695 va_ttl, cn_ttl, SETATTR_CHSIZE); 696 } 697 698 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 699 *ap->a_vpp = vp; 700 701 if (PUFFS_USE_NAMECACHE(pmp)) 702 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 703 cnp->cn_flags); 704 705 /* XXX */ 706 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 707 cnp->cn_flags &= ~REQUIREDIR; 708 if (lookup_msg->pvnr_cn.pkcn_consume) 709 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 710 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 711 712 VPTOPP(vp)->pn_nlookup++; 713 714 if (PUFFS_USE_DOTDOTCACHE(pmp) && 715 (VPTOPP(vp)->pn_parent != dvp)) 716 update_parent(vp, dvp); 717 718 out: 719 if (cvp != NULL) { 720 mutex_exit(&cpn->pn_sizemtx); 721 722 if (error || (cvp != vp)) 723 vput(cvp); 724 } 725 726 if (cnp->cn_flags & ISDOTDOT) 727 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 728 729 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 730 PUFFS_MSG_RELEASE(lookup); 731 return error; 732 } 733 734 #define REFPN_AND_UNLOCKVP(a, b) \ 735 do { \ 736 mutex_enter(&b->pn_mtx); \ 737 puffs_referencenode(b); \ 738 mutex_exit(&b->pn_mtx); \ 739 VOP_UNLOCK(a); \ 740 } while (/*CONSTCOND*/0) 741 742 #define REFPN(b) \ 743 do { \ 744 mutex_enter(&b->pn_mtx); \ 745 puffs_referencenode(b); \ 746 mutex_exit(&b->pn_mtx); \ 747 } while (/*CONSTCOND*/0) 748 749 #define RELEPN_AND_VP(a, b) \ 750 do { \ 751 puffs_releasenode(b); \ 752 vrele(a); \ 753 } while (/*CONSTCOND*/0) 754 755 int 756 puffs_vnop_create(void *v) 757 { 758 struct vop_create_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_dvp; 761 struct vnode **a_vpp; 762 struct componentname *a_cnp; 763 struct vattr *a_vap; 764 } */ *ap = v; 765 PUFFS_MSG_VARS(vn, create); 766 struct vnode *dvp = ap->a_dvp; 767 struct puffs_node *dpn = VPTOPP(dvp); 768 struct componentname *cnp = ap->a_cnp; 769 struct mount *mp = dvp->v_mount; 770 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 771 int error; 772 773 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 774 dvp, ap->a_cnp->cn_nameptr)); 775 776 PUFFS_MSG_ALLOC(vn, create); 777 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 778 cnp, PUFFS_USE_FULLPNBUF(pmp)); 779 create_msg->pvnr_va = *ap->a_vap; 780 puffs_msg_setinfo(park_create, PUFFSOP_VN, 781 PUFFS_VN_CREATE, VPTOPNC(dvp)); 782 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 783 784 error = checkerr(pmp, error, __func__); 785 if (error) 786 goto out; 787 788 error = puffs_newnode(mp, dvp, ap->a_vpp, 789 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 790 if (error) { 791 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 792 create_msg->pvnr_newnode, cnp); 793 goto out; 794 } 795 796 if (PUFFS_USE_FS_TTL(pmp)) { 797 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 798 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 799 struct vattr *rvap = &create_msg->pvnr_va; 800 801 update_va(*ap->a_vpp, NULL, rvap, 802 va_ttl, cn_ttl, SETATTR_CHSIZE); 803 } 804 805 VPTOPP(*ap->a_vpp)->pn_nlookup++; 806 807 if (PUFFS_USE_DOTDOTCACHE(pmp) && 808 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 809 update_parent(*ap->a_vpp, dvp); 810 811 out: 812 vput(dvp); 813 814 DPRINTF(("puffs_create: return %d\n", error)); 815 PUFFS_MSG_RELEASE(create); 816 return error; 817 } 818 819 int 820 puffs_vnop_mknod(void *v) 821 { 822 struct vop_mknod_args /* { 823 const struct vnodeop_desc *a_desc; 824 struct vnode *a_dvp; 825 struct vnode **a_vpp; 826 struct componentname *a_cnp; 827 struct vattr *a_vap; 828 } */ *ap = v; 829 PUFFS_MSG_VARS(vn, mknod); 830 struct vnode *dvp = ap->a_dvp; 831 struct puffs_node *dpn = VPTOPP(dvp); 832 struct componentname *cnp = ap->a_cnp; 833 struct mount *mp = dvp->v_mount; 834 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 835 int error; 836 837 PUFFS_MSG_ALLOC(vn, mknod); 838 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 839 cnp, PUFFS_USE_FULLPNBUF(pmp)); 840 mknod_msg->pvnr_va = *ap->a_vap; 841 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 842 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 843 844 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 845 846 error = checkerr(pmp, error, __func__); 847 if (error) 848 goto out; 849 850 error = puffs_newnode(mp, dvp, ap->a_vpp, 851 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 852 ap->a_vap->va_rdev); 853 if (error) { 854 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 855 mknod_msg->pvnr_newnode, cnp); 856 goto out; 857 } 858 859 if (PUFFS_USE_FS_TTL(pmp)) { 860 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 861 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 862 struct vattr *rvap = &mknod_msg->pvnr_va; 863 864 update_va(*ap->a_vpp, NULL, rvap, 865 va_ttl, cn_ttl, SETATTR_CHSIZE); 866 } 867 868 VPTOPP(*ap->a_vpp)->pn_nlookup++; 869 870 if (PUFFS_USE_DOTDOTCACHE(pmp) && 871 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 872 update_parent(*ap->a_vpp, dvp); 873 874 out: 875 vput(dvp); 876 PUFFS_MSG_RELEASE(mknod); 877 return error; 878 } 879 880 int 881 puffs_vnop_open(void *v) 882 { 883 struct vop_open_args /* { 884 const struct vnodeop_desc *a_desc; 885 struct vnode *a_vp; 886 int a_mode; 887 kauth_cred_t a_cred; 888 } */ *ap = v; 889 PUFFS_MSG_VARS(vn, open); 890 struct vnode *vp = ap->a_vp; 891 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 892 int mode = ap->a_mode; 893 int error; 894 895 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 896 897 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 898 ERROUT(EROFS); 899 900 if (!EXISTSOP(pmp, OPEN)) 901 ERROUT(0); 902 903 PUFFS_MSG_ALLOC(vn, open); 904 open_msg->pvnr_mode = mode; 905 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 906 puffs_msg_setinfo(park_open, PUFFSOP_VN, 907 PUFFS_VN_OPEN, VPTOPNC(vp)); 908 909 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 910 error = checkerr(pmp, error, __func__); 911 912 out: 913 DPRINTF(("puffs_open: returning %d\n", error)); 914 PUFFS_MSG_RELEASE(open); 915 return error; 916 } 917 918 int 919 puffs_vnop_close(void *v) 920 { 921 struct vop_close_args /* { 922 const struct vnodeop_desc *a_desc; 923 struct vnode *a_vp; 924 int a_fflag; 925 kauth_cred_t a_cred; 926 } */ *ap = v; 927 PUFFS_MSG_VARS(vn, close); 928 struct vnode *vp = ap->a_vp; 929 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 930 931 PUFFS_MSG_ALLOC(vn, close); 932 puffs_msg_setfaf(park_close); 933 close_msg->pvnr_fflag = ap->a_fflag; 934 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 935 puffs_msg_setinfo(park_close, PUFFSOP_VN, 936 PUFFS_VN_CLOSE, VPTOPNC(vp)); 937 938 puffs_msg_enqueue(pmp, park_close); 939 PUFFS_MSG_RELEASE(close); 940 return 0; 941 } 942 943 int 944 puffs_vnop_access(void *v) 945 { 946 struct vop_access_args /* { 947 const struct vnodeop_desc *a_desc; 948 struct vnode *a_vp; 949 int a_mode; 950 kauth_cred_t a_cred; 951 } */ *ap = v; 952 PUFFS_MSG_VARS(vn, access); 953 struct vnode *vp = ap->a_vp; 954 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 955 int mode = ap->a_mode; 956 int error; 957 958 if (mode & VWRITE) { 959 switch (vp->v_type) { 960 case VDIR: 961 case VLNK: 962 case VREG: 963 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 964 || !EXISTSOP(pmp, WRITE)) 965 return EROFS; 966 break; 967 default: 968 break; 969 } 970 } 971 972 if (!EXISTSOP(pmp, ACCESS)) 973 return 0; 974 975 PUFFS_MSG_ALLOC(vn, access); 976 access_msg->pvnr_mode = ap->a_mode; 977 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 978 puffs_msg_setinfo(park_access, PUFFSOP_VN, 979 PUFFS_VN_ACCESS, VPTOPNC(vp)); 980 981 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 982 error = checkerr(pmp, error, __func__); 983 PUFFS_MSG_RELEASE(access); 984 985 return error; 986 } 987 988 static void 989 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 990 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 991 { 992 struct puffs_node *pn = VPTOPP(vp); 993 994 if (TTL_VALID(cn_ttl)) { 995 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 996 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 997 } 998 999 /* 1000 * Don't listen to the file server regarding special device 1001 * size info, the file server doesn't know anything about them. 1002 */ 1003 if (vp->v_type == VBLK || vp->v_type == VCHR) 1004 rvap->va_size = vp->v_size; 1005 1006 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1007 if (vp->v_type == VBLK) 1008 rvap->va_blocksize = BLKDEV_IOSIZE; 1009 else if (vp->v_type == VCHR) 1010 rvap->va_blocksize = MAXBSIZE; 1011 1012 if (vap != NULL) { 1013 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1014 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1015 1016 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1017 vap->va_atime = pn->pn_mc_atime; 1018 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1019 vap->va_ctime = pn->pn_mc_ctime; 1020 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1021 vap->va_mtime = pn->pn_mc_mtime; 1022 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1023 vap->va_size = pn->pn_mc_size; 1024 } 1025 1026 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1027 if (rvap->va_size != VNOVAL 1028 && vp->v_type != VBLK && vp->v_type != VCHR) { 1029 uvm_vnp_setsize(vp, rvap->va_size); 1030 pn->pn_serversize = rvap->va_size; 1031 } 1032 } 1033 1034 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1035 if (pn->pn_va_cache == NULL) 1036 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1037 1038 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1039 1040 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1041 } 1042 } 1043 1044 static void 1045 update_parent(struct vnode *vp, struct vnode *dvp) 1046 { 1047 struct puffs_node *pn = VPTOPP(vp); 1048 1049 if (pn->pn_parent != NULL) { 1050 KASSERT(pn->pn_parent != dvp); 1051 vrele(pn->pn_parent); 1052 } 1053 1054 vref(dvp); 1055 pn->pn_parent = dvp; 1056 } 1057 1058 int 1059 puffs_vnop_getattr(void *v) 1060 { 1061 struct vop_getattr_args /* { 1062 const struct vnodeop_desc *a_desc; 1063 struct vnode *a_vp; 1064 struct vattr *a_vap; 1065 kauth_cred_t a_cred; 1066 } */ *ap = v; 1067 PUFFS_MSG_VARS(vn, getattr); 1068 struct vnode *vp = ap->a_vp; 1069 struct mount *mp = vp->v_mount; 1070 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1071 struct vattr *vap, *rvap; 1072 struct puffs_node *pn = VPTOPP(vp); 1073 struct timespec *va_ttl = NULL; 1074 int error = 0; 1075 1076 /* 1077 * A lock is required so that we do not race with 1078 * setattr, write and fsync when changing vp->v_size. 1079 * This is critical, since setting a stall smaler value 1080 * triggers a file truncate in uvm_vnp_setsize(), which 1081 * most of the time means data corruption (a chunk of 1082 * data is replaced by zeroes). This can be removed if 1083 * we decide one day that VOP_GETATTR must operate on 1084 * a locked vnode. 1085 * 1086 * XXX Should be useless now that VOP_GETATTR has been 1087 * fixed to always require a shared lock at least. 1088 */ 1089 mutex_enter(&pn->pn_sizemtx); 1090 1091 REFPN(pn); 1092 vap = ap->a_vap; 1093 1094 if (PUFFS_USE_FS_TTL(pmp)) { 1095 if (!TIMED_OUT(pn->pn_va_timeout)) { 1096 update_va(vp, vap, pn->pn_va_cache, 1097 NULL, NULL, SETATTR_CHSIZE); 1098 goto out2; 1099 } 1100 } 1101 1102 PUFFS_MSG_ALLOC(vn, getattr); 1103 vattr_null(&getattr_msg->pvnr_va); 1104 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1105 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1106 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1107 1108 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1109 error = checkerr(pmp, error, __func__); 1110 if (error) 1111 goto out; 1112 1113 rvap = &getattr_msg->pvnr_va; 1114 1115 if (PUFFS_USE_FS_TTL(pmp)) 1116 va_ttl = &getattr_msg->pvnr_va_ttl; 1117 1118 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1119 1120 out: 1121 PUFFS_MSG_RELEASE(getattr); 1122 1123 out2: 1124 puffs_releasenode(pn); 1125 1126 mutex_exit(&pn->pn_sizemtx); 1127 1128 return error; 1129 } 1130 1131 static int 1132 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1133 { 1134 PUFFS_MSG_VARS(vn, setattr); 1135 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1136 struct puffs_node *pn = vp->v_data; 1137 int error = 0; 1138 1139 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1140 1141 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1142 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1143 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1144 || vap->va_mode != (mode_t)VNOVAL)) 1145 return EROFS; 1146 1147 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1148 && vp->v_type == VREG && vap->va_size != VNOVAL) 1149 return EROFS; 1150 1151 /* 1152 * Flush metacache first. If we are called with some explicit 1153 * parameters, treat them as information overriding metacache 1154 * information. 1155 */ 1156 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1157 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1158 && vap->va_atime.tv_sec == VNOVAL) 1159 vap->va_atime = pn->pn_mc_atime; 1160 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1161 && vap->va_ctime.tv_sec == VNOVAL) 1162 vap->va_ctime = pn->pn_mc_ctime; 1163 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1164 && vap->va_mtime.tv_sec == VNOVAL) 1165 vap->va_mtime = pn->pn_mc_mtime; 1166 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1167 && vap->va_size == VNOVAL) 1168 vap->va_size = pn->pn_mc_size; 1169 1170 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1171 } 1172 1173 /* 1174 * Flush attribute cache so that another thread do 1175 * not get a stale value during the operation. 1176 */ 1177 if (PUFFS_USE_FS_TTL(pmp)) 1178 pn->pn_va_timeout = 0; 1179 1180 PUFFS_MSG_ALLOC(vn, setattr); 1181 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1182 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1183 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1184 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1185 if (flags & SETATTR_ASYNC) 1186 puffs_msg_setfaf(park_setattr); 1187 1188 puffs_msg_enqueue(pmp, park_setattr); 1189 if ((flags & SETATTR_ASYNC) == 0) 1190 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1191 1192 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1193 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1194 struct vattr *rvap = &setattr_msg->pvnr_va; 1195 1196 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1197 } 1198 1199 PUFFS_MSG_RELEASE(setattr); 1200 if ((flags & SETATTR_ASYNC) == 0) { 1201 error = checkerr(pmp, error, __func__); 1202 if (error) 1203 return error; 1204 } else { 1205 error = 0; 1206 } 1207 1208 if (vap->va_size != VNOVAL) { 1209 pn->pn_serversize = vap->va_size; 1210 if (flags & SETATTR_CHSIZE) 1211 uvm_vnp_setsize(vp, vap->va_size); 1212 } 1213 1214 return 0; 1215 } 1216 1217 int 1218 puffs_vnop_setattr(void *v) 1219 { 1220 struct vop_getattr_args /* { 1221 const struct vnodeop_desc *a_desc; 1222 struct vnode *a_vp; 1223 struct vattr *a_vap; 1224 kauth_cred_t a_cred; 1225 } */ *ap = v; 1226 struct puffs_node *pn = ap->a_vp->v_data; 1227 int error; 1228 1229 mutex_enter(&pn->pn_sizemtx); 1230 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1231 mutex_exit(&pn->pn_sizemtx); 1232 1233 return error; 1234 } 1235 1236 static __inline int 1237 doinact(struct puffs_mount *pmp, int iaflag) 1238 { 1239 1240 if (EXISTSOP(pmp, INACTIVE)) 1241 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1242 if (iaflag || ALLOPS(pmp)) 1243 return 1; 1244 else 1245 return 0; 1246 else 1247 return 1; 1248 else 1249 return 0; 1250 } 1251 1252 static void 1253 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1254 { 1255 int error; 1256 PUFFS_MSG_VARS(vn, inactive); 1257 1258 if (doinact(pmp, iaflag)) { 1259 PUFFS_MSG_ALLOC(vn, inactive); 1260 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1261 PUFFS_VN_INACTIVE, ck); 1262 1263 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1264 PUFFS_MSG_RELEASE(inactive); 1265 } 1266 } 1267 1268 /* XXX: callinactive can't setback */ 1269 int 1270 puffs_vnop_inactive(void *v) 1271 { 1272 struct vop_inactive_args /* { 1273 const struct vnodeop_desc *a_desc; 1274 struct vnode *a_vp; 1275 } */ *ap = v; 1276 PUFFS_MSG_VARS(vn, inactive); 1277 struct vnode *vp = ap->a_vp; 1278 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1279 struct puffs_node *pnode; 1280 bool recycle = false; 1281 int error; 1282 1283 pnode = vp->v_data; 1284 mutex_enter(&pnode->pn_sizemtx); 1285 1286 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1287 flushvncache(vp, 0, 0, false); 1288 PUFFS_MSG_ALLOC(vn, inactive); 1289 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1290 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1291 1292 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1293 NULL, error); 1294 PUFFS_MSG_RELEASE(inactive); 1295 } 1296 pnode->pn_stat &= ~PNODE_DOINACT; 1297 1298 /* 1299 * file server thinks it's gone? then don't be afraid care, 1300 * node's life was already all it would ever be 1301 */ 1302 if (pnode->pn_stat & PNODE_NOREFS) { 1303 pnode->pn_stat |= PNODE_DYING; 1304 recycle = true; 1305 } 1306 1307 /* 1308 * Handle node TTL. 1309 * If grace has already timed out, make it reclaimed. 1310 * Otherwise, we queue its expiration by sop thread, so 1311 * that it does not remain for ages in the freelist, 1312 * holding memory in userspace, while we will have 1313 * to look it up again anyway. 1314 */ 1315 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1316 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1317 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1318 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1319 1320 if (!incache && !ingrace && !reclaimqueued) { 1321 pnode->pn_stat |= PNODE_DYING; 1322 recycle = true; 1323 } 1324 1325 if (!recycle && !reclaimqueued) { 1326 struct puffs_sopreq *psopr; 1327 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1328 1329 KASSERT(curlwp != uvm.pagedaemon_lwp); 1330 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1331 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1332 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1333 psopr->psopr_at = at; 1334 1335 mutex_enter(&pmp->pmp_sopmtx); 1336 1337 /* 1338 * If thread has disapeared, just give up. The 1339 * fs is being unmounted and the node will be 1340 * be reclaimed anyway. 1341 * 1342 * Otherwise, we queue the request but do not 1343 * immediatly signal the thread, as the node 1344 * has not been expired yet. 1345 */ 1346 if (pmp->pmp_sopthrcount == 0) { 1347 kmem_free(psopr, sizeof(*psopr)); 1348 } else { 1349 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1350 psopr, psopr_entries); 1351 pnode->pn_stat |= PNODE_SOPEXP; 1352 } 1353 1354 mutex_exit(&pmp->pmp_sopmtx); 1355 } 1356 } 1357 1358 *ap->a_recycle = recycle; 1359 1360 mutex_exit(&pnode->pn_sizemtx); 1361 VOP_UNLOCK(vp); 1362 1363 return 0; 1364 } 1365 1366 static void 1367 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1368 { 1369 PUFFS_MSG_VARS(vn, reclaim); 1370 1371 if (!EXISTSOP(pmp, RECLAIM)) 1372 return; 1373 1374 PUFFS_MSG_ALLOC(vn, reclaim); 1375 reclaim_msg->pvnr_nlookup = nlookup; 1376 puffs_msg_setfaf(park_reclaim); 1377 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1378 1379 puffs_msg_enqueue(pmp, park_reclaim); 1380 PUFFS_MSG_RELEASE(reclaim); 1381 return; 1382 } 1383 1384 /* 1385 * always FAF, we don't really care if the server wants to fail to 1386 * reclaim the node or not 1387 */ 1388 int 1389 puffs_vnop_reclaim(void *v) 1390 { 1391 struct vop_reclaim_args /* { 1392 const struct vnodeop_desc *a_desc; 1393 struct vnode *a_vp; 1394 } */ *ap = v; 1395 struct vnode *vp = ap->a_vp; 1396 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1397 struct puffs_node *pnode = vp->v_data; 1398 bool notifyserver = true; 1399 1400 /* 1401 * first things first: check if someone is trying to reclaim the 1402 * root vnode. do not allow that to travel to userspace. 1403 * Note that we don't need to take the lock similarly to 1404 * puffs_root(), since there is only one of us. 1405 */ 1406 if (vp->v_vflag & VV_ROOT) { 1407 mutex_enter(&pmp->pmp_lock); 1408 KASSERT(pmp->pmp_root != NULL); 1409 pmp->pmp_root = NULL; 1410 mutex_exit(&pmp->pmp_lock); 1411 notifyserver = false; 1412 } 1413 1414 /* 1415 * purge info from kernel before issueing FAF, since we 1416 * don't really know when we'll get around to it after 1417 * that and someone might race us into node creation 1418 */ 1419 mutex_enter(&pmp->pmp_lock); 1420 LIST_REMOVE(pnode, pn_hashent); 1421 if (PUFFS_USE_NAMECACHE(pmp)) 1422 cache_purge(vp); 1423 mutex_exit(&pmp->pmp_lock); 1424 1425 if (notifyserver) { 1426 int nlookup = VPTOPP(vp)->pn_nlookup; 1427 1428 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1429 } 1430 1431 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1432 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1433 vrele(VPTOPP(vp)->pn_parent); 1434 else 1435 KASSERT(vp->v_vflag & VV_ROOT); 1436 } 1437 1438 puffs_putvnode(vp); 1439 vp->v_data = NULL; 1440 1441 return 0; 1442 } 1443 1444 #define CSIZE sizeof(**ap->a_cookies) 1445 int 1446 puffs_vnop_readdir(void *v) 1447 { 1448 struct vop_readdir_args /* { 1449 const struct vnodeop_desc *a_desc; 1450 struct vnode *a_vp; 1451 struct uio *a_uio; 1452 kauth_cred_t a_cred; 1453 int *a_eofflag; 1454 off_t **a_cookies; 1455 int *a_ncookies; 1456 } */ *ap = v; 1457 PUFFS_MSG_VARS(vn, readdir); 1458 struct vnode *vp = ap->a_vp; 1459 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1460 size_t argsize, tomove, cookiemem, cookiesmax; 1461 struct uio *uio = ap->a_uio; 1462 size_t howmuch, resid; 1463 int error; 1464 1465 /* 1466 * ok, so we need: resid + cookiemem = maxreq 1467 * => resid + cookiesize * (resid/minsize) = maxreq 1468 * => resid + cookiesize/minsize * resid = maxreq 1469 * => (cookiesize/minsize + 1) * resid = maxreq 1470 * => resid = maxreq / (cookiesize/minsize + 1) 1471 * 1472 * Since cookiesize <= minsize and we're not very big on floats, 1473 * we approximate that to be 1. Therefore: 1474 * 1475 * resid = maxreq / 2; 1476 * 1477 * Well, at least we didn't have to use differential equations 1478 * or the Gram-Schmidt process. 1479 * 1480 * (yes, I'm very afraid of this) 1481 */ 1482 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1483 1484 if (ap->a_cookies) { 1485 KASSERT(ap->a_ncookies != NULL); 1486 if (pmp->pmp_args.pa_fhsize == 0) 1487 return EOPNOTSUPP; 1488 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1489 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1490 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1491 } else { 1492 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1493 cookiesmax = 0; 1494 cookiemem = 0; 1495 } 1496 1497 argsize = sizeof(struct puffs_vnmsg_readdir); 1498 tomove = resid + cookiemem; 1499 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1500 (void *)&readdir_msg, 1); 1501 1502 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1503 readdir_msg->pvnr_offset = uio->uio_offset; 1504 readdir_msg->pvnr_resid = resid; 1505 readdir_msg->pvnr_ncookies = cookiesmax; 1506 readdir_msg->pvnr_eofflag = 0; 1507 readdir_msg->pvnr_dentoff = cookiemem; 1508 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1509 PUFFS_VN_READDIR, VPTOPNC(vp)); 1510 puffs_msg_setdelta(park_readdir, tomove); 1511 1512 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1513 error = checkerr(pmp, error, __func__); 1514 if (error) 1515 goto out; 1516 1517 /* userspace is cheating? */ 1518 if (readdir_msg->pvnr_resid > resid) { 1519 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1520 "resid grew", VPTOPNC(vp)); 1521 ERROUT(EPROTO); 1522 } 1523 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1524 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1525 "too many cookies", VPTOPNC(vp)); 1526 ERROUT(EPROTO); 1527 } 1528 1529 /* check eof */ 1530 if (readdir_msg->pvnr_eofflag) 1531 *ap->a_eofflag = 1; 1532 1533 /* bouncy-wouncy with the directory data */ 1534 howmuch = resid - readdir_msg->pvnr_resid; 1535 1536 /* force eof if no data was returned (getcwd() needs this) */ 1537 if (howmuch == 0) { 1538 *ap->a_eofflag = 1; 1539 goto out; 1540 } 1541 1542 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1543 if (error) 1544 goto out; 1545 1546 /* provide cookies to caller if so desired */ 1547 if (ap->a_cookies) { 1548 KASSERT(curlwp != uvm.pagedaemon_lwp); 1549 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1550 M_TEMP, M_WAITOK); 1551 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1552 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1553 *ap->a_ncookies*CSIZE); 1554 } 1555 1556 /* next readdir starts here */ 1557 uio->uio_offset = readdir_msg->pvnr_offset; 1558 1559 out: 1560 puffs_msgmem_release(park_readdir); 1561 return error; 1562 } 1563 #undef CSIZE 1564 1565 /* 1566 * poll works by consuming the bitmask in pn_revents. If there are 1567 * events available, poll returns immediately. If not, it issues a 1568 * poll to userspace, selrecords itself and returns with no available 1569 * events. When the file server returns, it executes puffs_parkdone_poll(), 1570 * where available events are added to the bitmask. selnotify() is 1571 * then also executed by that function causing us to enter here again 1572 * and hopefully find the missing bits (unless someone got them first, 1573 * in which case it starts all over again). 1574 */ 1575 int 1576 puffs_vnop_poll(void *v) 1577 { 1578 struct vop_poll_args /* { 1579 const struct vnodeop_desc *a_desc; 1580 struct vnode *a_vp; 1581 int a_events; 1582 } */ *ap = v; 1583 PUFFS_MSG_VARS(vn, poll); 1584 struct vnode *vp = ap->a_vp; 1585 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1586 struct puffs_node *pn = vp->v_data; 1587 int events, error; 1588 1589 if (EXISTSOP(pmp, POLL)) { 1590 mutex_enter(&pn->pn_mtx); 1591 events = pn->pn_revents & ap->a_events; 1592 if (events & ap->a_events) { 1593 pn->pn_revents &= ~ap->a_events; 1594 mutex_exit(&pn->pn_mtx); 1595 1596 return events; 1597 } else { 1598 puffs_referencenode(pn); 1599 mutex_exit(&pn->pn_mtx); 1600 1601 PUFFS_MSG_ALLOC(vn, poll); 1602 poll_msg->pvnr_events = ap->a_events; 1603 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1604 PUFFS_VN_POLL, VPTOPNC(vp)); 1605 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1606 selrecord(curlwp, &pn->pn_sel); 1607 1608 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1609 NULL, error); 1610 PUFFS_MSG_RELEASE(poll); 1611 1612 return 0; 1613 } 1614 } else { 1615 return genfs_poll(v); 1616 } 1617 } 1618 1619 static int 1620 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1621 { 1622 struct puffs_node *pn = VPTOPP(vp); 1623 struct vattr va; 1624 int pflags, error; 1625 1626 /* flush out information from our metacache, see vop_setattr */ 1627 if (pn->pn_stat & PNODE_METACACHE_MASK 1628 && (pn->pn_stat & PNODE_DYING) == 0) { 1629 vattr_null(&va); 1630 error = dosetattr(vp, &va, FSCRED, 1631 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1632 if (error) 1633 return error; 1634 } 1635 1636 /* 1637 * flush pages to avoid being overly dirty 1638 */ 1639 pflags = PGO_CLEANIT; 1640 if (wait) 1641 pflags |= PGO_SYNCIO; 1642 1643 mutex_enter(vp->v_interlock); 1644 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1645 } 1646 1647 int 1648 puffs_vnop_fsync(void *v) 1649 { 1650 struct vop_fsync_args /* { 1651 const struct vnodeop_desc *a_desc; 1652 struct vnode *a_vp; 1653 kauth_cred_t a_cred; 1654 int a_flags; 1655 off_t a_offlo; 1656 off_t a_offhi; 1657 } */ *ap = v; 1658 PUFFS_MSG_VARS(vn, fsync); 1659 struct vnode *vp; 1660 struct puffs_node *pn; 1661 struct puffs_mount *pmp; 1662 int error, dofaf; 1663 1664 vp = ap->a_vp; 1665 KASSERT(vp != NULL); 1666 pn = VPTOPP(vp); 1667 KASSERT(pn != NULL); 1668 pmp = MPTOPUFFSMP(vp->v_mount); 1669 if (ap->a_flags & FSYNC_WAIT) { 1670 mutex_enter(&pn->pn_sizemtx); 1671 } else { 1672 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1673 return EDEADLK; 1674 } 1675 1676 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1677 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1678 if (error) 1679 goto out; 1680 1681 /* 1682 * HELLO! We exit already here if the user server does not 1683 * support fsync OR if we should call fsync for a node which 1684 * has references neither in the kernel or the fs server. 1685 * Otherwise we continue to issue fsync() forward. 1686 */ 1687 error = 0; 1688 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1689 goto out; 1690 1691 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1692 /* 1693 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1694 * only FAFs for those. Otherwise there's a danger of deadlock, 1695 * since the execution context here might be the user server 1696 * doing some operation on another fs, which in turn caused a 1697 * vnode to be reclaimed from the freelist for this fs. 1698 */ 1699 if (dofaf == 0) { 1700 mutex_enter(vp->v_interlock); 1701 if (vp->v_iflag & VI_XLOCK) 1702 dofaf = 1; 1703 mutex_exit(vp->v_interlock); 1704 } 1705 1706 PUFFS_MSG_ALLOC(vn, fsync); 1707 if (dofaf) 1708 puffs_msg_setfaf(park_fsync); 1709 1710 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1711 fsync_msg->pvnr_flags = ap->a_flags; 1712 fsync_msg->pvnr_offlo = ap->a_offlo; 1713 fsync_msg->pvnr_offhi = ap->a_offhi; 1714 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1715 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1716 1717 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1718 PUFFS_MSG_RELEASE(fsync); 1719 1720 error = checkerr(pmp, error, __func__); 1721 1722 out: 1723 mutex_exit(&pn->pn_sizemtx); 1724 return error; 1725 } 1726 1727 int 1728 puffs_vnop_seek(void *v) 1729 { 1730 struct vop_seek_args /* { 1731 const struct vnodeop_desc *a_desc; 1732 struct vnode *a_vp; 1733 off_t a_oldoff; 1734 off_t a_newoff; 1735 kauth_cred_t a_cred; 1736 } */ *ap = v; 1737 PUFFS_MSG_VARS(vn, seek); 1738 struct vnode *vp = ap->a_vp; 1739 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1740 int error; 1741 1742 PUFFS_MSG_ALLOC(vn, seek); 1743 seek_msg->pvnr_oldoff = ap->a_oldoff; 1744 seek_msg->pvnr_newoff = ap->a_newoff; 1745 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1746 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1747 PUFFS_VN_SEEK, VPTOPNC(vp)); 1748 1749 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1750 PUFFS_MSG_RELEASE(seek); 1751 return checkerr(pmp, error, __func__); 1752 } 1753 1754 static int 1755 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1756 struct componentname *cnp) 1757 { 1758 PUFFS_MSG_VARS(vn, remove); 1759 int error; 1760 1761 PUFFS_MSG_ALLOC(vn, remove); 1762 remove_msg->pvnr_cookie_targ = ck; 1763 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1764 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1765 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1766 1767 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1768 PUFFS_MSG_RELEASE(remove); 1769 1770 return checkerr(pmp, error, __func__); 1771 } 1772 1773 /* 1774 * XXX: can't use callremove now because can't catch setbacks with 1775 * it due to lack of a pnode argument. 1776 */ 1777 int 1778 puffs_vnop_remove(void *v) 1779 { 1780 struct vop_remove_args /* { 1781 const struct vnodeop_desc *a_desc; 1782 struct vnode *a_dvp; 1783 struct vnode *a_vp; 1784 struct componentname *a_cnp; 1785 } */ *ap = v; 1786 PUFFS_MSG_VARS(vn, remove); 1787 struct vnode *dvp = ap->a_dvp; 1788 struct vnode *vp = ap->a_vp; 1789 struct puffs_node *dpn = VPTOPP(dvp); 1790 struct puffs_node *pn = VPTOPP(vp); 1791 struct componentname *cnp = ap->a_cnp; 1792 struct mount *mp = dvp->v_mount; 1793 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1794 int error; 1795 1796 PUFFS_MSG_ALLOC(vn, remove); 1797 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1798 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1799 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1800 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1801 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1802 1803 puffs_msg_enqueue(pmp, park_remove); 1804 REFPN_AND_UNLOCKVP(dvp, dpn); 1805 if (dvp == vp) 1806 REFPN(pn); 1807 else 1808 REFPN_AND_UNLOCKVP(vp, pn); 1809 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1810 1811 PUFFS_MSG_RELEASE(remove); 1812 1813 RELEPN_AND_VP(dvp, dpn); 1814 RELEPN_AND_VP(vp, pn); 1815 1816 error = checkerr(pmp, error, __func__); 1817 return error; 1818 } 1819 1820 int 1821 puffs_vnop_mkdir(void *v) 1822 { 1823 struct vop_mkdir_args /* { 1824 const struct vnodeop_desc *a_desc; 1825 struct vnode *a_dvp; 1826 struct vnode **a_vpp; 1827 struct componentname *a_cnp; 1828 struct vattr *a_vap; 1829 } */ *ap = v; 1830 PUFFS_MSG_VARS(vn, mkdir); 1831 struct vnode *dvp = ap->a_dvp; 1832 struct puffs_node *dpn = VPTOPP(dvp); 1833 struct componentname *cnp = ap->a_cnp; 1834 struct mount *mp = dvp->v_mount; 1835 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1836 int error; 1837 1838 PUFFS_MSG_ALLOC(vn, mkdir); 1839 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1840 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1841 mkdir_msg->pvnr_va = *ap->a_vap; 1842 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1843 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1844 1845 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1846 1847 error = checkerr(pmp, error, __func__); 1848 if (error) 1849 goto out; 1850 1851 error = puffs_newnode(mp, dvp, ap->a_vpp, 1852 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1853 if (error) { 1854 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1855 mkdir_msg->pvnr_newnode, cnp); 1856 goto out; 1857 } 1858 1859 if (PUFFS_USE_FS_TTL(pmp)) { 1860 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1861 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1862 struct vattr *rvap = &mkdir_msg->pvnr_va; 1863 1864 update_va(*ap->a_vpp, NULL, rvap, 1865 va_ttl, cn_ttl, SETATTR_CHSIZE); 1866 } 1867 1868 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1869 1870 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1871 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1872 update_parent(*ap->a_vpp, dvp); 1873 1874 out: 1875 vput(dvp); 1876 PUFFS_MSG_RELEASE(mkdir); 1877 return error; 1878 } 1879 1880 static int 1881 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1882 struct componentname *cnp) 1883 { 1884 PUFFS_MSG_VARS(vn, rmdir); 1885 int error; 1886 1887 PUFFS_MSG_ALLOC(vn, rmdir); 1888 rmdir_msg->pvnr_cookie_targ = ck; 1889 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1890 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1891 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1892 1893 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1894 PUFFS_MSG_RELEASE(rmdir); 1895 1896 return checkerr(pmp, error, __func__); 1897 } 1898 1899 int 1900 puffs_vnop_rmdir(void *v) 1901 { 1902 struct vop_rmdir_args /* { 1903 const struct vnodeop_desc *a_desc; 1904 struct vnode *a_dvp; 1905 struct vnode *a_vp; 1906 struct componentname *a_cnp; 1907 } */ *ap = v; 1908 PUFFS_MSG_VARS(vn, rmdir); 1909 struct vnode *dvp = ap->a_dvp; 1910 struct vnode *vp = ap->a_vp; 1911 struct puffs_node *dpn = VPTOPP(dvp); 1912 struct puffs_node *pn = VPTOPP(vp); 1913 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1914 struct componentname *cnp = ap->a_cnp; 1915 int error; 1916 1917 PUFFS_MSG_ALLOC(vn, rmdir); 1918 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1919 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1920 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1921 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1922 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1923 1924 puffs_msg_enqueue(pmp, park_rmdir); 1925 REFPN_AND_UNLOCKVP(dvp, dpn); 1926 REFPN_AND_UNLOCKVP(vp, pn); 1927 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1928 1929 PUFFS_MSG_RELEASE(rmdir); 1930 1931 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1932 RELEPN_AND_VP(dvp, dpn); 1933 RELEPN_AND_VP(vp, pn); 1934 1935 return error; 1936 } 1937 1938 int 1939 puffs_vnop_link(void *v) 1940 { 1941 struct vop_link_args /* { 1942 const struct vnodeop_desc *a_desc; 1943 struct vnode *a_dvp; 1944 struct vnode *a_vp; 1945 struct componentname *a_cnp; 1946 } */ *ap = v; 1947 PUFFS_MSG_VARS(vn, link); 1948 struct vnode *dvp = ap->a_dvp; 1949 struct vnode *vp = ap->a_vp; 1950 struct puffs_node *dpn = VPTOPP(dvp); 1951 struct puffs_node *pn = VPTOPP(vp); 1952 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1953 struct componentname *cnp = ap->a_cnp; 1954 int error; 1955 1956 PUFFS_MSG_ALLOC(vn, link); 1957 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1958 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1959 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1960 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1961 PUFFS_VN_LINK, VPTOPNC(dvp)); 1962 1963 puffs_msg_enqueue(pmp, park_link); 1964 REFPN_AND_UNLOCKVP(dvp, dpn); 1965 REFPN(pn); 1966 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1967 1968 PUFFS_MSG_RELEASE(link); 1969 1970 error = checkerr(pmp, error, __func__); 1971 1972 /* 1973 * XXX: stay in touch with the cache. I don't like this, but 1974 * don't have a better solution either. See also puffs_rename(). 1975 */ 1976 if (error == 0) 1977 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1978 1979 RELEPN_AND_VP(dvp, dpn); 1980 puffs_releasenode(pn); 1981 1982 return error; 1983 } 1984 1985 int 1986 puffs_vnop_symlink(void *v) 1987 { 1988 struct vop_symlink_args /* { 1989 const struct vnodeop_desc *a_desc; 1990 struct vnode *a_dvp; 1991 struct vnode **a_vpp; 1992 struct componentname *a_cnp; 1993 struct vattr *a_vap; 1994 char *a_target; 1995 } */ *ap = v; 1996 PUFFS_MSG_VARS(vn, symlink); 1997 struct vnode *dvp = ap->a_dvp; 1998 struct puffs_node *dpn = VPTOPP(dvp); 1999 struct mount *mp = dvp->v_mount; 2000 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2001 struct componentname *cnp = ap->a_cnp; 2002 int error; 2003 2004 *ap->a_vpp = NULL; 2005 2006 PUFFS_MSG_ALLOC(vn, symlink); 2007 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2008 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2009 symlink_msg->pvnr_va = *ap->a_vap; 2010 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2011 sizeof(symlink_msg->pvnr_link)); 2012 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2013 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2014 2015 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2016 2017 error = checkerr(pmp, error, __func__); 2018 if (error) 2019 goto out; 2020 2021 error = puffs_newnode(mp, dvp, ap->a_vpp, 2022 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2023 if (error) { 2024 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2025 symlink_msg->pvnr_newnode, cnp); 2026 goto out; 2027 } 2028 2029 if (PUFFS_USE_FS_TTL(pmp)) { 2030 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2031 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2032 struct vattr *rvap = &symlink_msg->pvnr_va; 2033 2034 update_va(*ap->a_vpp, NULL, rvap, 2035 va_ttl, cn_ttl, SETATTR_CHSIZE); 2036 } 2037 2038 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2039 2040 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2041 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2042 update_parent(*ap->a_vpp, dvp); 2043 2044 out: 2045 vput(dvp); 2046 PUFFS_MSG_RELEASE(symlink); 2047 2048 return error; 2049 } 2050 2051 int 2052 puffs_vnop_readlink(void *v) 2053 { 2054 struct vop_readlink_args /* { 2055 const struct vnodeop_desc *a_desc; 2056 struct vnode *a_vp; 2057 struct uio *a_uio; 2058 kauth_cred_t a_cred; 2059 } */ *ap = v; 2060 PUFFS_MSG_VARS(vn, readlink); 2061 struct vnode *vp = ap->a_vp; 2062 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2063 size_t linklen; 2064 int error; 2065 2066 PUFFS_MSG_ALLOC(vn, readlink); 2067 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2068 linklen = sizeof(readlink_msg->pvnr_link); 2069 readlink_msg->pvnr_linklen = linklen; 2070 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2071 PUFFS_VN_READLINK, VPTOPNC(vp)); 2072 2073 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2074 error = checkerr(pmp, error, __func__); 2075 if (error) 2076 goto out; 2077 2078 /* bad bad user file server */ 2079 if (readlink_msg->pvnr_linklen > linklen) { 2080 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2081 "linklen too big", VPTOPNC(ap->a_vp)); 2082 error = EPROTO; 2083 goto out; 2084 } 2085 2086 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2087 ap->a_uio); 2088 out: 2089 PUFFS_MSG_RELEASE(readlink); 2090 return error; 2091 } 2092 2093 int 2094 puffs_vnop_rename(void *v) 2095 { 2096 struct vop_rename_args /* { 2097 const struct vnodeop_desc *a_desc; 2098 struct vnode *a_fdvp; 2099 struct vnode *a_fvp; 2100 struct componentname *a_fcnp; 2101 struct vnode *a_tdvp; 2102 struct vnode *a_tvp; 2103 struct componentname *a_tcnp; 2104 } */ *ap = v; 2105 PUFFS_MSG_VARS(vn, rename); 2106 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2107 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2108 struct puffs_node *fpn = ap->a_fvp->v_data; 2109 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2110 int error; 2111 bool doabort = true; 2112 2113 if ((fvp->v_mount != tdvp->v_mount) || 2114 (tvp && (fvp->v_mount != tvp->v_mount))) { 2115 ERROUT(EXDEV); 2116 } 2117 2118 PUFFS_MSG_ALLOC(vn, rename); 2119 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2120 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2121 if (tvp) 2122 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2123 else 2124 rename_msg->pvnr_cookie_targ = NULL; 2125 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2126 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2127 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2128 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2129 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2130 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2131 2132 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2133 doabort = false; 2134 PUFFS_MSG_RELEASE(rename); 2135 error = checkerr(pmp, error, __func__); 2136 2137 /* 2138 * XXX: stay in touch with the cache. I don't like this, but 2139 * don't have a better solution either. See also puffs_link(). 2140 */ 2141 if (error == 0) { 2142 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2143 2144 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2145 (VPTOPP(fvp)->pn_parent != tdvp)) 2146 update_parent(fvp, tdvp); 2147 } 2148 2149 2150 out: 2151 if (doabort) 2152 VOP_ABORTOP(tdvp, ap->a_tcnp); 2153 if (tvp != NULL) 2154 vput(tvp); 2155 if (tdvp == tvp) 2156 vrele(tdvp); 2157 else 2158 vput(tdvp); 2159 2160 if (doabort) 2161 VOP_ABORTOP(fdvp, ap->a_fcnp); 2162 vrele(fdvp); 2163 vrele(fvp); 2164 2165 return error; 2166 } 2167 2168 #define RWARGS(cont, iofl, move, offset, creds) \ 2169 (cont)->pvnr_ioflag = (iofl); \ 2170 (cont)->pvnr_resid = (move); \ 2171 (cont)->pvnr_offset = (offset); \ 2172 puffs_credcvt(&(cont)->pvnr_cred, creds) 2173 2174 int 2175 puffs_vnop_read(void *v) 2176 { 2177 struct vop_read_args /* { 2178 const struct vnodeop_desc *a_desc; 2179 struct vnode *a_vp; 2180 struct uio *a_uio; 2181 int a_ioflag; 2182 kauth_cred_t a_cred; 2183 } */ *ap = v; 2184 PUFFS_MSG_VARS(vn, read); 2185 struct vnode *vp = ap->a_vp; 2186 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2187 struct uio *uio = ap->a_uio; 2188 size_t tomove, argsize; 2189 vsize_t bytelen; 2190 int error; 2191 2192 read_msg = NULL; 2193 error = 0; 2194 2195 /* std sanity */ 2196 if (uio->uio_resid == 0) 2197 return 0; 2198 if (uio->uio_offset < 0) 2199 return EINVAL; 2200 2201 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2202 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2203 2204 while (uio->uio_resid > 0) { 2205 if (vp->v_size <= uio->uio_offset) { 2206 break; 2207 } 2208 bytelen = MIN(uio->uio_resid, 2209 vp->v_size - uio->uio_offset); 2210 if (bytelen == 0) 2211 break; 2212 2213 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2214 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2215 if (error) 2216 break; 2217 } 2218 2219 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2220 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2221 } else { 2222 /* 2223 * in case it's not a regular file or we're operating 2224 * uncached, do read in the old-fashioned style, 2225 * i.e. explicit read operations 2226 */ 2227 2228 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2229 argsize = sizeof(struct puffs_vnmsg_read); 2230 puffs_msgmem_alloc(argsize + tomove, &park_read, 2231 (void *)&read_msg, 1); 2232 2233 error = 0; 2234 while (uio->uio_resid > 0) { 2235 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2236 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2237 RWARGS(read_msg, ap->a_ioflag, tomove, 2238 uio->uio_offset, ap->a_cred); 2239 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2240 PUFFS_VN_READ, VPTOPNC(vp)); 2241 puffs_msg_setdelta(park_read, tomove); 2242 2243 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2244 NULL, error); 2245 error = checkerr(pmp, error, __func__); 2246 if (error) 2247 break; 2248 2249 if (read_msg->pvnr_resid > tomove) { 2250 puffs_senderr(pmp, PUFFS_ERR_READ, 2251 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2252 error = EPROTO; 2253 break; 2254 } 2255 2256 error = uiomove(read_msg->pvnr_data, 2257 tomove - read_msg->pvnr_resid, uio); 2258 2259 /* 2260 * in case the file is out of juice, resid from 2261 * userspace is != 0. and the error-case is 2262 * quite obvious 2263 */ 2264 if (error || read_msg->pvnr_resid) 2265 break; 2266 } 2267 2268 puffs_msgmem_release(park_read); 2269 } 2270 2271 return error; 2272 } 2273 2274 /* 2275 * XXX: in case of a failure, this leaves uio in a bad state. 2276 * We could theoretically copy the uio and iovecs and "replay" 2277 * them the right amount after the userspace trip, but don't 2278 * bother for now. 2279 */ 2280 int 2281 puffs_vnop_write(void *v) 2282 { 2283 struct vop_write_args /* { 2284 const struct vnodeop_desc *a_desc; 2285 struct vnode *a_vp; 2286 struct uio *a_uio; 2287 int a_ioflag; 2288 kauth_cred_t a_cred; 2289 } */ *ap = v; 2290 PUFFS_MSG_VARS(vn, write); 2291 struct vnode *vp = ap->a_vp; 2292 struct puffs_node *pn = VPTOPP(vp); 2293 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2294 struct uio *uio = ap->a_uio; 2295 size_t tomove, argsize; 2296 off_t oldoff, newoff, origoff; 2297 vsize_t bytelen; 2298 int error, uflags; 2299 int ubcflags; 2300 2301 error = uflags = 0; 2302 write_msg = NULL; 2303 2304 mutex_enter(&pn->pn_sizemtx); 2305 2306 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2307 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2308 2309 /* 2310 * userspace *should* be allowed to control this, 2311 * but with UBC it's a bit unclear how to handle it 2312 */ 2313 if (ap->a_ioflag & IO_APPEND) 2314 uio->uio_offset = vp->v_size; 2315 2316 origoff = uio->uio_offset; 2317 while (uio->uio_resid > 0) { 2318 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2319 uflags |= PUFFS_UPDATEATIME; 2320 uflags |= PUFFS_UPDATECTIME; 2321 uflags |= PUFFS_UPDATEMTIME; 2322 oldoff = uio->uio_offset; 2323 bytelen = uio->uio_resid; 2324 2325 newoff = oldoff + bytelen; 2326 if (vp->v_size < newoff) { 2327 uvm_vnp_setwritesize(vp, newoff); 2328 } 2329 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2330 UVM_ADV_RANDOM, ubcflags); 2331 2332 /* 2333 * In case of a ubc_uiomove() error, 2334 * opt to not extend the file at all and 2335 * return an error. Otherwise, if we attempt 2336 * to clear the memory we couldn't fault to, 2337 * we might generate a kernel page fault. 2338 */ 2339 if (vp->v_size < newoff) { 2340 if (error == 0) { 2341 uflags |= PUFFS_UPDATESIZE; 2342 uvm_vnp_setsize(vp, newoff); 2343 } else { 2344 uvm_vnp_setwritesize(vp, vp->v_size); 2345 } 2346 } 2347 if (error) 2348 break; 2349 2350 /* 2351 * If we're writing large files, flush to file server 2352 * every 64k. Otherwise we can very easily exhaust 2353 * kernel and user memory, as the file server cannot 2354 * really keep up with our writing speed. 2355 * 2356 * Note: this does *NOT* honor MNT_ASYNC, because 2357 * that gives userland too much say in the kernel. 2358 */ 2359 if (oldoff >> 16 != uio->uio_offset >> 16) { 2360 mutex_enter(vp->v_interlock); 2361 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2362 uio->uio_offset & ~0xffff, 2363 PGO_CLEANIT | PGO_SYNCIO); 2364 if (error) 2365 break; 2366 } 2367 } 2368 2369 /* synchronous I/O? */ 2370 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2371 mutex_enter(vp->v_interlock); 2372 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2373 round_page(uio->uio_offset), 2374 PGO_CLEANIT | PGO_SYNCIO); 2375 2376 /* write through page cache? */ 2377 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2378 mutex_enter(vp->v_interlock); 2379 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2380 round_page(uio->uio_offset), PGO_CLEANIT); 2381 } 2382 2383 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2384 } else { 2385 /* tomove is non-increasing */ 2386 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2387 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2388 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2389 2390 while (uio->uio_resid > 0) { 2391 /* move data to buffer */ 2392 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2393 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2394 RWARGS(write_msg, ap->a_ioflag, tomove, 2395 uio->uio_offset, ap->a_cred); 2396 error = uiomove(write_msg->pvnr_data, tomove, uio); 2397 if (error) 2398 break; 2399 2400 /* move buffer to userspace */ 2401 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2402 PUFFS_VN_WRITE, VPTOPNC(vp)); 2403 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2404 NULL, error); 2405 error = checkerr(pmp, error, __func__); 2406 if (error) 2407 break; 2408 2409 if (write_msg->pvnr_resid > tomove) { 2410 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2411 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2412 error = EPROTO; 2413 break; 2414 } 2415 2416 /* adjust file size */ 2417 if (vp->v_size < uio->uio_offset) 2418 uvm_vnp_setsize(vp, uio->uio_offset); 2419 2420 /* didn't move everything? bad userspace. bail */ 2421 if (write_msg->pvnr_resid != 0) { 2422 error = EIO; 2423 break; 2424 } 2425 } 2426 puffs_msgmem_release(park_write); 2427 } 2428 2429 mutex_exit(&pn->pn_sizemtx); 2430 return error; 2431 } 2432 2433 int 2434 puffs_vnop_print(void *v) 2435 { 2436 struct vop_print_args /* { 2437 struct vnode *a_vp; 2438 } */ *ap = v; 2439 PUFFS_MSG_VARS(vn, print); 2440 struct vnode *vp = ap->a_vp; 2441 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2442 struct puffs_node *pn = vp->v_data; 2443 int error; 2444 2445 /* kernel portion */ 2446 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2447 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2448 if (vp->v_type == VFIFO) 2449 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2450 printf("\n"); 2451 2452 /* userspace portion */ 2453 if (EXISTSOP(pmp, PRINT)) { 2454 PUFFS_MSG_ALLOC(vn, print); 2455 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2456 PUFFS_VN_PRINT, VPTOPNC(vp)); 2457 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2458 NULL, error); 2459 PUFFS_MSG_RELEASE(print); 2460 } 2461 2462 return 0; 2463 } 2464 2465 int 2466 puffs_vnop_pathconf(void *v) 2467 { 2468 struct vop_pathconf_args /* { 2469 const struct vnodeop_desc *a_desc; 2470 struct vnode *a_vp; 2471 int a_name; 2472 register_t *a_retval; 2473 } */ *ap = v; 2474 PUFFS_MSG_VARS(vn, pathconf); 2475 struct vnode *vp = ap->a_vp; 2476 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2477 int error; 2478 2479 PUFFS_MSG_ALLOC(vn, pathconf); 2480 pathconf_msg->pvnr_name = ap->a_name; 2481 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2482 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2483 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2484 error = checkerr(pmp, error, __func__); 2485 if (!error) 2486 *ap->a_retval = pathconf_msg->pvnr_retval; 2487 PUFFS_MSG_RELEASE(pathconf); 2488 2489 return error; 2490 } 2491 2492 int 2493 puffs_vnop_advlock(void *v) 2494 { 2495 struct vop_advlock_args /* { 2496 const struct vnodeop_desc *a_desc; 2497 struct vnode *a_vp; 2498 void *a_id; 2499 int a_op; 2500 struct flock *a_fl; 2501 int a_flags; 2502 } */ *ap = v; 2503 PUFFS_MSG_VARS(vn, advlock); 2504 struct vnode *vp = ap->a_vp; 2505 struct puffs_node *pn = VPTOPP(vp); 2506 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2507 int error; 2508 2509 if (!EXISTSOP(pmp, ADVLOCK)) 2510 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2511 2512 PUFFS_MSG_ALLOC(vn, advlock); 2513 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2514 sizeof(advlock_msg->pvnr_fl)); 2515 advlock_msg->pvnr_id = ap->a_id; 2516 advlock_msg->pvnr_op = ap->a_op; 2517 advlock_msg->pvnr_flags = ap->a_flags; 2518 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2519 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2520 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2521 error = checkerr(pmp, error, __func__); 2522 PUFFS_MSG_RELEASE(advlock); 2523 2524 return error; 2525 } 2526 2527 int 2528 puffs_vnop_abortop(void *v) 2529 { 2530 struct vop_abortop_args /* { 2531 struct vnode *a_dvp; 2532 struct componentname *a_cnp; 2533 }; */ *ap = v; 2534 PUFFS_MSG_VARS(vn, abortop); 2535 struct vnode *dvp = ap->a_dvp; 2536 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2537 struct componentname *cnp = ap->a_cnp; 2538 2539 if (EXISTSOP(pmp, ABORTOP)) { 2540 PUFFS_MSG_ALLOC(vn, abortop); 2541 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2542 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2543 puffs_msg_setfaf(park_abortop); 2544 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2545 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2546 2547 puffs_msg_enqueue(pmp, park_abortop); 2548 PUFFS_MSG_RELEASE(abortop); 2549 } 2550 2551 return genfs_abortop(v); 2552 } 2553 2554 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2555 2556 /* 2557 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2558 */ 2559 int 2560 puffs_vnop_strategy(void *v) 2561 { 2562 struct vop_strategy_args /* { 2563 const struct vnodeop_desc *a_desc; 2564 struct vnode *a_vp; 2565 struct buf *a_bp; 2566 } */ *ap = v; 2567 PUFFS_MSG_VARS(vn, rw); 2568 struct vnode *vp = ap->a_vp; 2569 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2570 struct puffs_node *pn; 2571 struct buf *bp; 2572 size_t argsize; 2573 size_t tomove, moved; 2574 int error, dofaf, cansleep, dobiodone; 2575 2576 pmp = MPTOPUFFSMP(vp->v_mount); 2577 bp = ap->a_bp; 2578 error = 0; 2579 dofaf = 0; 2580 cansleep = 0; 2581 pn = VPTOPP(vp); 2582 park_rw = NULL; /* explicit */ 2583 dobiodone = 1; 2584 2585 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2586 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2587 ERROUT(EOPNOTSUPP); 2588 2589 /* 2590 * Short-circuit optimization: don't flush buffer in between 2591 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2592 */ 2593 if (pn->pn_stat & PNODE_DYING) { 2594 KASSERT(BUF_ISWRITE(bp)); 2595 bp->b_resid = 0; 2596 goto out; 2597 } 2598 2599 #ifdef DIAGNOSTIC 2600 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2601 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2602 bp->b_bcount); 2603 #endif 2604 2605 /* 2606 * See explanation for the necessity of a FAF in puffs_fsync. 2607 * 2608 * Also, do FAF in case we're suspending. 2609 * See puffs_vfsops.c:pageflush() 2610 */ 2611 if (BUF_ISWRITE(bp)) { 2612 mutex_enter(vp->v_interlock); 2613 if (vp->v_iflag & VI_XLOCK) 2614 dofaf = 1; 2615 if (pn->pn_stat & PNODE_FAF) 2616 dofaf = 1; 2617 mutex_exit(vp->v_interlock); 2618 } 2619 2620 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2621 2622 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2623 2624 /* allocate transport structure */ 2625 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2626 argsize = sizeof(struct puffs_vnmsg_rw); 2627 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2628 (void *)&rw_msg, cansleep); 2629 if (error) 2630 goto out; 2631 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2632 2633 /* 2x2 cases: read/write, faf/nofaf */ 2634 if (BUF_ISREAD(bp)) { 2635 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2636 PUFFS_VN_READ, VPTOPNC(vp)); 2637 puffs_msg_setdelta(park_rw, tomove); 2638 if (BIOASYNC(bp)) { 2639 puffs_msg_setcall(park_rw, 2640 puffs_parkdone_asyncbioread, bp); 2641 puffs_msg_enqueue(pmp, park_rw); 2642 dobiodone = 0; 2643 } else { 2644 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2645 NULL, error); 2646 error = checkerr(pmp, error, __func__); 2647 if (error) 2648 goto out; 2649 2650 if (rw_msg->pvnr_resid > tomove) { 2651 puffs_senderr(pmp, PUFFS_ERR_READ, 2652 E2BIG, "resid grew", VPTOPNC(vp)); 2653 ERROUT(EPROTO); 2654 } 2655 2656 moved = tomove - rw_msg->pvnr_resid; 2657 2658 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2659 bp->b_resid = bp->b_bcount - moved; 2660 } 2661 } else { 2662 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2663 PUFFS_VN_WRITE, VPTOPNC(vp)); 2664 /* 2665 * make pages read-only before we write them if we want 2666 * write caching info 2667 */ 2668 if (PUFFS_WCACHEINFO(pmp)) { 2669 struct uvm_object *uobj = &vp->v_uobj; 2670 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2671 struct vm_page *vmp; 2672 int i; 2673 2674 for (i = 0; i < npages; i++) { 2675 vmp= uvm_pageratop((vaddr_t)bp->b_data 2676 + (i << PAGE_SHIFT)); 2677 DPRINTF(("puffs_strategy: write-protecting " 2678 "vp %p page %p, offset %" PRId64"\n", 2679 vp, vmp, vmp->offset)); 2680 mutex_enter(uobj->vmobjlock); 2681 vmp->flags |= PG_RDONLY; 2682 pmap_page_protect(vmp, VM_PROT_READ); 2683 mutex_exit(uobj->vmobjlock); 2684 } 2685 } 2686 2687 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2688 if (dofaf) { 2689 puffs_msg_setfaf(park_rw); 2690 } else if (BIOASYNC(bp)) { 2691 puffs_msg_setcall(park_rw, 2692 puffs_parkdone_asyncbiowrite, bp); 2693 dobiodone = 0; 2694 } 2695 2696 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2697 2698 if (dobiodone == 0) 2699 goto out; 2700 2701 /* 2702 * XXXXXXXX: wrong, but kernel can't survive strategy 2703 * failure currently. Here, have one more X: X. 2704 */ 2705 if (error != ENOMEM) 2706 error = 0; 2707 2708 error = checkerr(pmp, error, __func__); 2709 if (error) 2710 goto out; 2711 2712 if (rw_msg->pvnr_resid > tomove) { 2713 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2714 E2BIG, "resid grew", VPTOPNC(vp)); 2715 ERROUT(EPROTO); 2716 } 2717 2718 /* 2719 * FAF moved everything. Frankly, we don't 2720 * really have a choice. 2721 */ 2722 if (dofaf && error == 0) 2723 moved = tomove; 2724 else 2725 moved = tomove - rw_msg->pvnr_resid; 2726 2727 bp->b_resid = bp->b_bcount - moved; 2728 if (bp->b_resid != 0) { 2729 ERROUT(EIO); 2730 } 2731 } 2732 2733 out: 2734 if (park_rw) 2735 puffs_msgmem_release(park_rw); 2736 2737 if (error) 2738 bp->b_error = error; 2739 2740 if (error || dobiodone) 2741 biodone(bp); 2742 2743 return error; 2744 } 2745 2746 int 2747 puffs_vnop_mmap(void *v) 2748 { 2749 struct vop_mmap_args /* { 2750 const struct vnodeop_desc *a_desc; 2751 struct vnode *a_vp; 2752 vm_prot_t a_prot; 2753 kauth_cred_t a_cred; 2754 } */ *ap = v; 2755 PUFFS_MSG_VARS(vn, mmap); 2756 struct vnode *vp = ap->a_vp; 2757 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2758 int error; 2759 2760 if (!PUFFS_USE_PAGECACHE(pmp)) 2761 return genfs_eopnotsupp(v); 2762 2763 if (EXISTSOP(pmp, MMAP)) { 2764 PUFFS_MSG_ALLOC(vn, mmap); 2765 mmap_msg->pvnr_prot = ap->a_prot; 2766 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2767 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2768 PUFFS_VN_MMAP, VPTOPNC(vp)); 2769 2770 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2771 error = checkerr(pmp, error, __func__); 2772 PUFFS_MSG_RELEASE(mmap); 2773 } else { 2774 error = genfs_mmap(v); 2775 } 2776 2777 return error; 2778 } 2779 2780 2781 /* 2782 * The rest don't get a free trip to userspace and back, they 2783 * have to stay within the kernel. 2784 */ 2785 2786 /* 2787 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2788 * well, maybe somehow, somewhere, some day .... 2789 */ 2790 int 2791 puffs_vnop_bmap(void *v) 2792 { 2793 struct vop_bmap_args /* { 2794 const struct vnodeop_desc *a_desc; 2795 struct vnode *a_vp; 2796 daddr_t a_bn; 2797 struct vnode **a_vpp; 2798 daddr_t *a_bnp; 2799 int *a_runp; 2800 } */ *ap = v; 2801 struct puffs_mount *pmp; 2802 2803 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2804 2805 if (ap->a_vpp) 2806 *ap->a_vpp = ap->a_vp; 2807 if (ap->a_bnp) 2808 *ap->a_bnp = ap->a_bn; 2809 if (ap->a_runp) 2810 *ap->a_runp 2811 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2812 2813 return 0; 2814 } 2815 2816 /* 2817 * Handle getpages faults in puffs. We let genfs_getpages() do most 2818 * of the dirty work, but we come in this route to do accounting tasks. 2819 * If the user server has specified functions for cache notifications 2820 * about reads and/or writes, we record which type of operation we got, 2821 * for which page range, and proceed to issue a FAF notification to the 2822 * server about it. 2823 */ 2824 int 2825 puffs_vnop_getpages(void *v) 2826 { 2827 struct vop_getpages_args /* { 2828 const struct vnodeop_desc *a_desc; 2829 struct vnode *a_vp; 2830 voff_t a_offset; 2831 struct vm_page **a_m; 2832 int *a_count; 2833 int a_centeridx; 2834 vm_prot_t a_access_type; 2835 int a_advice; 2836 int a_flags; 2837 } */ *ap = v; 2838 struct puffs_mount *pmp; 2839 struct puffs_node *pn; 2840 struct vnode *vp; 2841 struct vm_page **pgs; 2842 struct puffs_cacheinfo *pcinfo = NULL; 2843 struct puffs_cacherun *pcrun; 2844 void *parkmem = NULL; 2845 size_t runsizes; 2846 int i, npages, si, streakon; 2847 int error, locked, write; 2848 2849 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2850 npages = *ap->a_count; 2851 pgs = ap->a_m; 2852 vp = ap->a_vp; 2853 pn = vp->v_data; 2854 locked = (ap->a_flags & PGO_LOCKED) != 0; 2855 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2856 2857 /* ccg xnaht - gets Wuninitialized wrong */ 2858 pcrun = NULL; 2859 runsizes = 0; 2860 2861 /* 2862 * Check that we aren't trying to fault in pages which our file 2863 * server doesn't know about. This happens if we extend a file by 2864 * skipping some pages and later try to fault in pages which 2865 * are between pn_serversize and vp_size. This check optimizes 2866 * away the common case where a file is being extended. 2867 */ 2868 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2869 struct vattr va; 2870 2871 /* try again later when we can block */ 2872 if (locked) 2873 ERROUT(EBUSY); 2874 2875 mutex_exit(vp->v_interlock); 2876 vattr_null(&va); 2877 va.va_size = vp->v_size; 2878 error = dosetattr(vp, &va, FSCRED, 0); 2879 if (error) 2880 ERROUT(error); 2881 mutex_enter(vp->v_interlock); 2882 } 2883 2884 if (write && PUFFS_WCACHEINFO(pmp)) { 2885 #ifdef notnowjohn 2886 /* allocate worst-case memory */ 2887 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2888 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2889 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2890 locked ? KM_NOSLEEP : KM_SLEEP); 2891 2892 /* 2893 * can't block if we're locked and can't mess up caching 2894 * information for fs server. so come back later, please 2895 */ 2896 if (pcinfo == NULL) 2897 ERROUT(ENOMEM); 2898 2899 parkmem = puffs_park_alloc(locked == 0); 2900 if (parkmem == NULL) 2901 ERROUT(ENOMEM); 2902 2903 pcrun = pcinfo->pcache_runs; 2904 #else 2905 (void)parkmem; 2906 #endif 2907 } 2908 2909 error = genfs_getpages(v); 2910 if (error) 2911 goto out; 2912 2913 if (PUFFS_WCACHEINFO(pmp) == 0) 2914 goto out; 2915 2916 /* 2917 * Let's see whose fault it was and inform the user server of 2918 * possibly read/written pages. Map pages from read faults 2919 * strictly read-only, since otherwise we might miss info on 2920 * when the page is actually write-faulted to. 2921 */ 2922 if (!locked) 2923 mutex_enter(vp->v_uobj.vmobjlock); 2924 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2925 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2926 if (streakon && write) { 2927 streakon = 0; 2928 pcrun[si].pcache_runend 2929 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2930 si++; 2931 } 2932 continue; 2933 } 2934 if (streakon == 0 && write) { 2935 streakon = 1; 2936 pcrun[si].pcache_runstart = pgs[i]->offset; 2937 } 2938 2939 if (!write) 2940 pgs[i]->flags |= PG_RDONLY; 2941 } 2942 /* was the last page part of our streak? */ 2943 if (streakon) { 2944 pcrun[si].pcache_runend 2945 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2946 si++; 2947 } 2948 if (!locked) 2949 mutex_exit(vp->v_uobj.vmobjlock); 2950 2951 KASSERT(si <= (npages / 2) + 1); 2952 2953 #ifdef notnowjohn 2954 /* send results to userspace */ 2955 if (write) 2956 puffs_cacheop(pmp, parkmem, pcinfo, 2957 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2958 #endif 2959 2960 out: 2961 if (error) { 2962 if (pcinfo != NULL) 2963 kmem_free(pcinfo, 2964 sizeof(struct puffs_cacheinfo) + runsizes); 2965 #ifdef notnowjohn 2966 if (parkmem != NULL) 2967 puffs_park_release(parkmem, 1); 2968 #endif 2969 } 2970 2971 return error; 2972 } 2973 2974 /* 2975 * Extended attribute support. 2976 */ 2977 2978 int 2979 puffs_vnop_getextattr(void *v) 2980 { 2981 struct vop_getextattr_args /* 2982 struct vnode *a_vp; 2983 int a_attrnamespace; 2984 const char *a_name; 2985 struct uio *a_uio; 2986 size_t *a_size; 2987 kauth_cred_t a_cred; 2988 }; */ *ap = v; 2989 PUFFS_MSG_VARS(vn, getextattr); 2990 struct vnode *vp = ap->a_vp; 2991 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2992 int attrnamespace = ap->a_attrnamespace; 2993 const char *name = ap->a_name; 2994 struct uio *uio = ap->a_uio; 2995 size_t *sizep = ap->a_size; 2996 size_t tomove, resid; 2997 int error; 2998 2999 if (uio) 3000 resid = uio->uio_resid; 3001 else 3002 resid = 0; 3003 3004 tomove = PUFFS_TOMOVE(resid, pmp); 3005 if (tomove != resid) { 3006 error = E2BIG; 3007 goto out; 3008 } 3009 3010 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3011 &park_getextattr, (void *)&getextattr_msg, 1); 3012 3013 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3014 strlcpy(getextattr_msg->pvnr_attrname, name, 3015 sizeof(getextattr_msg->pvnr_attrname)); 3016 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3017 if (sizep) 3018 getextattr_msg->pvnr_datasize = 1; 3019 getextattr_msg->pvnr_resid = tomove; 3020 3021 puffs_msg_setinfo(park_getextattr, 3022 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3023 puffs_msg_setdelta(park_getextattr, tomove); 3024 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3025 3026 error = checkerr(pmp, error, __func__); 3027 if (error) 3028 goto out; 3029 3030 resid = getextattr_msg->pvnr_resid; 3031 if (resid > tomove) { 3032 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3033 "resid grew", VPTOPNC(vp)); 3034 error = EPROTO; 3035 goto out; 3036 } 3037 3038 if (sizep) 3039 *sizep = getextattr_msg->pvnr_datasize; 3040 if (uio) 3041 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3042 3043 out: 3044 PUFFS_MSG_RELEASE(getextattr); 3045 return error; 3046 } 3047 3048 int 3049 puffs_vnop_setextattr(void *v) 3050 { 3051 struct vop_setextattr_args /* { 3052 struct vnode *a_vp; 3053 int a_attrnamespace; 3054 const char *a_name; 3055 struct uio *a_uio; 3056 kauth_cred_t a_cred; 3057 }; */ *ap = v; 3058 PUFFS_MSG_VARS(vn, setextattr); 3059 struct vnode *vp = ap->a_vp; 3060 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3061 int attrnamespace = ap->a_attrnamespace; 3062 const char *name = ap->a_name; 3063 struct uio *uio = ap->a_uio; 3064 size_t tomove, resid; 3065 int error; 3066 3067 if (uio) 3068 resid = uio->uio_resid; 3069 else 3070 resid = 0; 3071 3072 tomove = PUFFS_TOMOVE(resid, pmp); 3073 if (tomove != resid) { 3074 error = E2BIG; 3075 goto out; 3076 } 3077 3078 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3079 &park_setextattr, (void *)&setextattr_msg, 1); 3080 3081 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3082 strlcpy(setextattr_msg->pvnr_attrname, name, 3083 sizeof(setextattr_msg->pvnr_attrname)); 3084 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3085 setextattr_msg->pvnr_resid = tomove; 3086 3087 if (uio) { 3088 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3089 if (error) 3090 goto out; 3091 } 3092 3093 puffs_msg_setinfo(park_setextattr, 3094 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3095 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3096 3097 error = checkerr(pmp, error, __func__); 3098 if (error) 3099 goto out; 3100 3101 if (setextattr_msg->pvnr_resid != 0) 3102 error = EIO; 3103 3104 out: 3105 PUFFS_MSG_RELEASE(setextattr); 3106 3107 return error; 3108 } 3109 3110 int 3111 puffs_vnop_listextattr(void *v) 3112 { 3113 struct vop_listextattr_args /* { 3114 struct vnode *a_vp; 3115 int a_attrnamespace; 3116 struct uio *a_uio; 3117 size_t *a_size; 3118 int a_flag, 3119 kauth_cred_t a_cred; 3120 }; */ *ap = v; 3121 PUFFS_MSG_VARS(vn, listextattr); 3122 struct vnode *vp = ap->a_vp; 3123 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3124 int attrnamespace = ap->a_attrnamespace; 3125 struct uio *uio = ap->a_uio; 3126 size_t *sizep = ap->a_size; 3127 int flag = ap->a_flag; 3128 size_t tomove, resid; 3129 int error; 3130 3131 if (uio) 3132 resid = uio->uio_resid; 3133 else 3134 resid = 0; 3135 3136 tomove = PUFFS_TOMOVE(resid, pmp); 3137 if (tomove != resid) { 3138 error = E2BIG; 3139 goto out; 3140 } 3141 3142 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3143 &park_listextattr, (void *)&listextattr_msg, 1); 3144 3145 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3146 listextattr_msg->pvnr_flag = flag; 3147 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3148 listextattr_msg->pvnr_resid = tomove; 3149 if (sizep) 3150 listextattr_msg->pvnr_datasize = 1; 3151 3152 puffs_msg_setinfo(park_listextattr, 3153 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3154 puffs_msg_setdelta(park_listextattr, tomove); 3155 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3156 3157 error = checkerr(pmp, error, __func__); 3158 if (error) 3159 goto out; 3160 3161 resid = listextattr_msg->pvnr_resid; 3162 if (resid > tomove) { 3163 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3164 "resid grew", VPTOPNC(vp)); 3165 error = EPROTO; 3166 goto out; 3167 } 3168 3169 if (sizep) 3170 *sizep = listextattr_msg->pvnr_datasize; 3171 if (uio) 3172 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3173 3174 out: 3175 PUFFS_MSG_RELEASE(listextattr); 3176 return error; 3177 } 3178 3179 int 3180 puffs_vnop_deleteextattr(void *v) 3181 { 3182 struct vop_deleteextattr_args /* { 3183 struct vnode *a_vp; 3184 int a_attrnamespace; 3185 const char *a_name; 3186 kauth_cred_t a_cred; 3187 }; */ *ap = v; 3188 PUFFS_MSG_VARS(vn, deleteextattr); 3189 struct vnode *vp = ap->a_vp; 3190 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3191 int attrnamespace = ap->a_attrnamespace; 3192 const char *name = ap->a_name; 3193 int error; 3194 3195 PUFFS_MSG_ALLOC(vn, deleteextattr); 3196 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3197 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3198 sizeof(deleteextattr_msg->pvnr_attrname)); 3199 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3200 3201 puffs_msg_setinfo(park_deleteextattr, 3202 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3203 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3204 vp->v_data, NULL, error); 3205 3206 error = checkerr(pmp, error, __func__); 3207 3208 PUFFS_MSG_RELEASE(deleteextattr); 3209 return error; 3210 } 3211 3212 /* 3213 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3214 * FAF update information for the puffs node first. 3215 */ 3216 int 3217 puffs_vnop_spec_read(void *v) 3218 { 3219 struct vop_read_args /* { 3220 const struct vnodeop_desc *a_desc; 3221 struct vnode *a_vp; 3222 struct uio *a_uio; 3223 int a_ioflag; 3224 kauth_cred_t a_cred; 3225 } */ *ap = v; 3226 3227 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3228 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3229 } 3230 3231 int 3232 puffs_vnop_spec_write(void *v) 3233 { 3234 struct vop_write_args /* { 3235 const struct vnodeop_desc *a_desc; 3236 struct vnode *a_vp; 3237 struct uio *a_uio; 3238 int a_ioflag; 3239 kauth_cred_t a_cred; 3240 } */ *ap = v; 3241 3242 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3243 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3244 } 3245 3246 int 3247 puffs_vnop_fifo_read(void *v) 3248 { 3249 struct vop_read_args /* { 3250 const struct vnodeop_desc *a_desc; 3251 struct vnode *a_vp; 3252 struct uio *a_uio; 3253 int a_ioflag; 3254 kauth_cred_t a_cred; 3255 } */ *ap = v; 3256 3257 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3258 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3259 } 3260 3261 int 3262 puffs_vnop_fifo_write(void *v) 3263 { 3264 struct vop_write_args /* { 3265 const struct vnodeop_desc *a_desc; 3266 struct vnode *a_vp; 3267 struct uio *a_uio; 3268 int a_ioflag; 3269 kauth_cred_t a_cred; 3270 } */ *ap = v; 3271 3272 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3273 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3274 } 3275
Indexes created Thu Oct 02 01:09:59 GMT 2025