puffs_vnops.c revision 1.183
1 /* $NetBSD: puffs_vnops.c,v 1.183 2014/08/16 16:19:41 manu Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.183 2014/08/16 16:19:41 manu Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, hardclock_ticks */ 44 45 #include <uvm/uvm.h> 46 47 #include <fs/puffs/puffs_msgif.h> 48 #include <fs/puffs/puffs_sys.h> 49 50 #include <miscfs/fifofs/fifo.h> 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> 53 54 int puffs_vnop_lookup(void *); 55 int puffs_vnop_create(void *); 56 int puffs_vnop_access(void *); 57 int puffs_vnop_mknod(void *); 58 int puffs_vnop_open(void *); 59 int puffs_vnop_close(void *); 60 int puffs_vnop_getattr(void *); 61 int puffs_vnop_setattr(void *); 62 int puffs_vnop_reclaim(void *); 63 int puffs_vnop_readdir(void *); 64 int puffs_vnop_poll(void *); 65 int puffs_vnop_fsync(void *); 66 int puffs_vnop_seek(void *); 67 int puffs_vnop_remove(void *); 68 int puffs_vnop_mkdir(void *); 69 int puffs_vnop_rmdir(void *); 70 int puffs_vnop_link(void *); 71 int puffs_vnop_readlink(void *); 72 int puffs_vnop_symlink(void *); 73 int puffs_vnop_rename(void *); 74 int puffs_vnop_read(void *); 75 int puffs_vnop_write(void *); 76 int puffs_vnop_fcntl(void *); 77 int puffs_vnop_ioctl(void *); 78 int puffs_vnop_inactive(void *); 79 int puffs_vnop_print(void *); 80 int puffs_vnop_pathconf(void *); 81 int puffs_vnop_advlock(void *); 82 int puffs_vnop_strategy(void *); 83 int puffs_vnop_bmap(void *); 84 int puffs_vnop_mmap(void *); 85 int puffs_vnop_getpages(void *); 86 int puffs_vnop_abortop(void *); 87 int puffs_vnop_getextattr(void *); 88 int puffs_vnop_setextattr(void *); 89 int puffs_vnop_listextattr(void *); 90 int puffs_vnop_deleteextattr(void *); 91 92 int puffs_vnop_spec_read(void *); 93 int puffs_vnop_spec_write(void *); 94 int puffs_vnop_fifo_read(void *); 95 int puffs_vnop_fifo_write(void *); 96 97 int puffs_vnop_checkop(void *); 98 99 #define puffs_vnop_lock genfs_lock 100 #define puffs_vnop_unlock genfs_unlock 101 #define puffs_vnop_islocked genfs_islocked 102 103 int (**puffs_vnodeop_p)(void *); 104 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 107 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 108 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 109 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 110 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 111 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 112 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 113 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 114 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 115 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 116 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 117 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 118 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 119 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 120 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 121 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 122 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 123 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 124 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 125 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 126 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 127 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 128 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 129 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 130 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 131 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 132 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 133 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 134 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 135 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 136 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 137 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 138 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 139 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 140 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 141 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 142 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 143 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 144 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 145 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 146 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 147 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 148 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 149 #if 0 150 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 151 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 152 #endif 153 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 154 { NULL, NULL } 155 }; 156 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 157 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 158 159 160 int (**puffs_specop_p)(void *); 161 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 162 { &vop_default_desc, vn_default_error }, 163 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 164 { &vop_create_desc, spec_create }, /* genfs_badop */ 165 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 166 { &vop_open_desc, spec_open }, /* spec_open */ 167 { &vop_close_desc, spec_close }, /* spec_close */ 168 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 169 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 170 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 171 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 172 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 173 { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ 174 { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ 175 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 176 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 177 { &vop_poll_desc, spec_poll }, /* spec_poll */ 178 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 179 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 180 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 181 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 182 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 183 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 184 { &vop_link_desc, spec_link }, /* genfs_badop */ 185 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 186 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 187 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 188 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 189 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 190 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 191 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 192 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 193 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 194 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 195 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 196 { &vop_bmap_desc, spec_bmap }, /* dummy */ 197 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 198 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 199 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 200 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 201 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 202 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 203 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 204 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 205 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 206 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 207 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 208 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 209 #if 0 210 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 211 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 212 #endif 213 { NULL, NULL } 214 }; 215 const struct vnodeopv_desc puffs_specop_opv_desc = 216 { &puffs_specop_p, puffs_specop_entries }; 217 218 219 int (**puffs_fifoop_p)(void *); 220 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 221 { &vop_default_desc, vn_default_error }, 222 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 223 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 224 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 225 { &vop_open_desc, vn_fifo_bypass }, /* open */ 226 { &vop_close_desc, vn_fifo_bypass }, /* close */ 227 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 228 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 229 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 230 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 231 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 232 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ 233 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ 234 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 235 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 236 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 237 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 238 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 239 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 241 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 246 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 247 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 248 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 249 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 252 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 253 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 254 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 255 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 256 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 257 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 258 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 259 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 260 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 261 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 262 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 263 #if 0 264 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 265 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 266 #endif 267 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 268 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 269 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 270 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 271 { NULL, NULL } 272 }; 273 const struct vnodeopv_desc puffs_fifoop_opv_desc = 274 { &puffs_fifoop_p, puffs_fifoop_entries }; 275 276 277 /* "real" vnode operations */ 278 int (**puffs_msgop_p)(void *); 279 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 280 { &vop_default_desc, vn_default_error }, 281 { &vop_create_desc, puffs_vnop_create }, /* create */ 282 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 283 { &vop_open_desc, puffs_vnop_open }, /* open */ 284 { &vop_close_desc, puffs_vnop_close }, /* close */ 285 { &vop_access_desc, puffs_vnop_access }, /* access */ 286 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 287 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 288 { &vop_read_desc, puffs_vnop_read }, /* read */ 289 { &vop_write_desc, puffs_vnop_write }, /* write */ 290 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 291 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 292 { &vop_link_desc, puffs_vnop_link }, /* link */ 293 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 294 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 295 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 296 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 297 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 298 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 299 { &vop_print_desc, puffs_vnop_print }, /* print */ 300 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 301 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 302 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 303 { NULL, NULL } 304 }; 305 const struct vnodeopv_desc puffs_msgop_opv_desc = 306 { &puffs_msgop_p, puffs_msgop_entries }; 307 308 /* 309 * for dosetattr / update_va 310 */ 311 #define SETATTR_CHSIZE 0x01 312 #define SETATTR_ASYNC 0x02 313 314 #define ERROUT(err) \ 315 do { \ 316 error = err; \ 317 goto out; \ 318 } while (/*CONSTCOND*/0) 319 320 /* 321 * This is a generic vnode operation handler. It checks if the necessary 322 * operations for the called vnode operation are implemented by userspace 323 * and either returns a dummy return value or proceeds to call the real 324 * vnode operation from puffs_msgop_v. 325 * 326 * XXX: this should described elsewhere and autogenerated, the complexity 327 * of the vnode operations vectors and their interrelationships is also 328 * getting a bit out of hand. Another problem is that we need this same 329 * information in the fs server code, so keeping the two in sync manually 330 * is not a viable (long term) plan. 331 */ 332 333 /* not supported, handle locking protocol */ 334 #define CHECKOP_NOTSUPP(op) \ 335 case VOP_##op##_DESCOFFSET: \ 336 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 337 return genfs_eopnotsupp(v); \ 338 break 339 340 /* always succeed, no locking */ 341 #define CHECKOP_SUCCESS(op) \ 342 case VOP_##op##_DESCOFFSET: \ 343 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 344 return 0; \ 345 break 346 347 int 348 puffs_vnop_checkop(void *v) 349 { 350 struct vop_generic_args /* { 351 struct vnodeop_desc *a_desc; 352 spooky mystery contents; 353 } */ *ap = v; 354 struct vnodeop_desc *desc = ap->a_desc; 355 struct puffs_mount *pmp; 356 struct vnode *vp; 357 int offset, rv; 358 359 offset = ap->a_desc->vdesc_vp_offsets[0]; 360 #ifdef DIAGNOSTIC 361 if (offset == VDESC_NO_OFFSET) 362 panic("puffs_checkop: no vnode, why did you call me?"); 363 #endif 364 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 365 pmp = MPTOPUFFSMP(vp->v_mount); 366 367 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 368 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 369 370 if (!ALLOPS(pmp)) { 371 switch (desc->vdesc_offset) { 372 CHECKOP_NOTSUPP(CREATE); 373 CHECKOP_NOTSUPP(MKNOD); 374 CHECKOP_NOTSUPP(GETATTR); 375 CHECKOP_NOTSUPP(SETATTR); 376 CHECKOP_NOTSUPP(READ); 377 CHECKOP_NOTSUPP(WRITE); 378 CHECKOP_NOTSUPP(FCNTL); 379 CHECKOP_NOTSUPP(IOCTL); 380 CHECKOP_NOTSUPP(REMOVE); 381 CHECKOP_NOTSUPP(LINK); 382 CHECKOP_NOTSUPP(RENAME); 383 CHECKOP_NOTSUPP(MKDIR); 384 CHECKOP_NOTSUPP(RMDIR); 385 CHECKOP_NOTSUPP(SYMLINK); 386 CHECKOP_NOTSUPP(READDIR); 387 CHECKOP_NOTSUPP(READLINK); 388 CHECKOP_NOTSUPP(PRINT); 389 CHECKOP_NOTSUPP(PATHCONF); 390 CHECKOP_NOTSUPP(GETEXTATTR); 391 CHECKOP_NOTSUPP(SETEXTATTR); 392 CHECKOP_NOTSUPP(LISTEXTATTR); 393 CHECKOP_NOTSUPP(DELETEEXTATTR); 394 395 CHECKOP_SUCCESS(ACCESS); 396 CHECKOP_SUCCESS(CLOSE); 397 CHECKOP_SUCCESS(SEEK); 398 399 case VOP_GETPAGES_DESCOFFSET: 400 if (!EXISTSOP(pmp, READ)) 401 return genfs_eopnotsupp(v); 402 break; 403 404 default: 405 panic("puffs_checkop: unhandled vnop %d", 406 desc->vdesc_offset); 407 } 408 } 409 410 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 411 412 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 413 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 414 415 return rv; 416 } 417 418 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 419 struct componentname *); 420 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 421 struct componentname *); 422 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 423 static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); 424 static int flushvncache(struct vnode *, off_t, off_t, bool); 425 static void update_va(struct vnode *, struct vattr *, struct vattr *, 426 struct timespec *, struct timespec *, int); 427 static void update_parent(struct vnode *, struct vnode *); 428 429 430 #define PUFFS_ABORT_LOOKUP 1 431 #define PUFFS_ABORT_CREATE 2 432 #define PUFFS_ABORT_MKNOD 3 433 #define PUFFS_ABORT_MKDIR 4 434 #define PUFFS_ABORT_SYMLINK 5 435 436 /* 437 * Press the pani^Wabort button! Kernel resource allocation failed. 438 */ 439 static void 440 puffs_abortbutton(struct puffs_mount *pmp, int what, 441 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 442 { 443 444 switch (what) { 445 case PUFFS_ABORT_CREATE: 446 case PUFFS_ABORT_MKNOD: 447 case PUFFS_ABORT_SYMLINK: 448 callremove(pmp, dck, ck, cnp); 449 break; 450 case PUFFS_ABORT_MKDIR: 451 callrmdir(pmp, dck, ck, cnp); 452 break; 453 } 454 455 callinactive(pmp, ck, 0); 456 callreclaim(pmp, ck, 1); 457 } 458 459 /* 460 * Begin vnode operations. 461 * 462 * A word from the keymaster about locks: generally we don't want 463 * to use the vnode locks at all: it creates an ugly dependency between 464 * the userlandia file server and the kernel. But we'll play along with 465 * the kernel vnode locks for now. However, even currently we attempt 466 * to release locks as early as possible. This is possible for some 467 * operations which a) don't need a locked vnode after the userspace op 468 * and b) return with the vnode unlocked. Theoretically we could 469 * unlock-do op-lock for others and order the graph in userspace, but I 470 * don't want to think of the consequences for the time being. 471 */ 472 473 #define TTL_TO_TIMEOUT(ts) \ 474 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 475 #define TTL_VALID(ts) \ 476 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 477 #define TIMED_OUT(expire) \ 478 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 479 int 480 puffs_vnop_lookup(void *v) 481 { 482 struct vop_lookup_v2_args /* { 483 const struct vnodeop_desc *a_desc; 484 struct vnode *a_dvp; 485 struct vnode **a_vpp; 486 struct componentname *a_cnp; 487 } */ *ap = v; 488 PUFFS_MSG_VARS(vn, lookup); 489 struct puffs_mount *pmp; 490 struct componentname *cnp; 491 struct vnode *vp, *dvp, *cvp; 492 struct puffs_node *dpn, *cpn; 493 int isdot; 494 int error; 495 496 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 497 cnp = ap->a_cnp; 498 dvp = ap->a_dvp; 499 cvp = NULL; 500 cpn = NULL; 501 *ap->a_vpp = NULL; 502 503 /* r/o fs? we check create later to handle EEXIST */ 504 if ((cnp->cn_flags & ISLASTCN) 505 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 506 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 507 return EROFS; 508 509 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 510 511 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 512 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 513 514 /* 515 * If dotdot cache is enabled, add reference to .. and return. 516 */ 517 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 518 vp = VPTOPP(ap->a_dvp)->pn_parent; 519 vref(vp); 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 referenced 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 if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { 587 vrele(cvp); 588 cvp = NULL; 589 } else 590 mutex_enter(&cpn->pn_sizemtx); 591 } 592 593 PUFFS_MSG_ALLOC(vn, lookup); 594 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 595 cnp, PUFFS_USE_FULLPNBUF(pmp)); 596 597 if (cnp->cn_flags & ISDOTDOT) 598 VOP_UNLOCK(dvp); 599 600 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 601 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 602 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 603 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 604 605 /* 606 * In case of error, there is no new vnode to play with, so be 607 * happy with the NULL value given to vpp in the beginning. 608 * Also, check if this really was an error or the target was not 609 * present. Either treat it as a non-error for CREATE/RENAME or 610 * enter the component into the negative name cache (if desired). 611 */ 612 if (error) { 613 error = checkerr(pmp, error, __func__); 614 if (error == ENOENT) { 615 /* don't allow to create files on r/o fs */ 616 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 617 && cnp->cn_nameiop == CREATE) { 618 error = EROFS; 619 620 /* adjust values if we are creating */ 621 } else if ((cnp->cn_flags & ISLASTCN) 622 && (cnp->cn_nameiop == CREATE 623 || cnp->cn_nameiop == RENAME)) { 624 error = EJUSTRETURN; 625 626 /* save negative cache entry */ 627 } else { 628 if (PUFFS_USE_NAMECACHE(pmp) && 629 !PUFFS_USE_FS_TTL(pmp)) 630 cache_enter(dvp, NULL, cnp->cn_nameptr, 631 cnp->cn_namelen, cnp->cn_flags); 632 } 633 } 634 goto out; 635 } 636 637 /* 638 * Check that we don't get our parent node back, that would cause 639 * a pretty obvious deadlock. 640 */ 641 dpn = dvp->v_data; 642 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 643 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 644 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 645 error = EPROTO; 646 goto out; 647 } 648 649 /* 650 * Check if we looked up the cached vnode 651 */ 652 vp = NULL; 653 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 654 int grace; 655 656 /* 657 * Bump grace time of this node so that it does not get 658 * reclaimed too fast. We try to increase a bit more the 659 * lifetime of busiest * nodes - with some limits. 660 */ 661 grace = 10 * puffs_sopreq_expire_timeout; 662 cpn->pn_cn_grace = hardclock_ticks + grace; 663 vp = cvp; 664 } 665 666 /* 667 * No cached vnode available, or the cached vnode does not 668 * match the userland cookie anymore: is the node known? 669 */ 670 if (vp == NULL) { 671 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 672 1, 1, &vp); 673 } 674 675 if (error == PUFFS_NOSUCHCOOKIE) { 676 error = puffs_getvnode(dvp->v_mount, 677 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 678 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 679 if (error) { 680 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 681 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 682 ap->a_cnp); 683 goto out; 684 } 685 686 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 687 } else if (error) { 688 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 689 lookup_msg->pvnr_newnode, ap->a_cnp); 690 goto out; 691 } 692 693 /* 694 * Update cache and TTL 695 */ 696 if (PUFFS_USE_FS_TTL(pmp)) { 697 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 698 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 699 update_va(vp, NULL, &lookup_msg->pvnr_va, 700 va_ttl, cn_ttl, SETATTR_CHSIZE); 701 } 702 703 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 704 *ap->a_vpp = vp; 705 706 if (PUFFS_USE_NAMECACHE(pmp)) 707 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 708 cnp->cn_flags); 709 710 /* XXX */ 711 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 712 cnp->cn_flags &= ~REQUIREDIR; 713 if (lookup_msg->pvnr_cn.pkcn_consume) 714 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 715 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 716 717 VPTOPP(vp)->pn_nlookup++; 718 719 if (PUFFS_USE_DOTDOTCACHE(pmp) && 720 (VPTOPP(vp)->pn_parent != dvp)) 721 update_parent(vp, dvp); 722 723 out: 724 if (cvp != NULL) { 725 mutex_exit(&cpn->pn_sizemtx); 726 727 if (error || (cvp != vp)) 728 vput(cvp); 729 } 730 if (error == 0) 731 VOP_UNLOCK(*ap->a_vpp); 732 733 if (cnp->cn_flags & ISDOTDOT) 734 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 735 736 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 737 PUFFS_MSG_RELEASE(lookup); 738 return error; 739 } 740 741 #define REFPN_AND_UNLOCKVP(a, b) \ 742 do { \ 743 mutex_enter(&b->pn_mtx); \ 744 puffs_referencenode(b); \ 745 mutex_exit(&b->pn_mtx); \ 746 VOP_UNLOCK(a); \ 747 } while (/*CONSTCOND*/0) 748 749 #define REFPN(b) \ 750 do { \ 751 mutex_enter(&b->pn_mtx); \ 752 puffs_referencenode(b); \ 753 mutex_exit(&b->pn_mtx); \ 754 } while (/*CONSTCOND*/0) 755 756 #define RELEPN_AND_VP(a, b) \ 757 do { \ 758 puffs_releasenode(b); \ 759 vrele(a); \ 760 } while (/*CONSTCOND*/0) 761 762 int 763 puffs_vnop_create(void *v) 764 { 765 struct vop_create_v3_args /* { 766 const struct vnodeop_desc *a_desc; 767 struct vnode *a_dvp; 768 struct vnode **a_vpp; 769 struct componentname *a_cnp; 770 struct vattr *a_vap; 771 } */ *ap = v; 772 PUFFS_MSG_VARS(vn, create); 773 struct vnode *dvp = ap->a_dvp; 774 struct puffs_node *dpn = VPTOPP(dvp); 775 struct componentname *cnp = ap->a_cnp; 776 struct mount *mp = dvp->v_mount; 777 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 778 int error; 779 780 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 781 dvp, ap->a_cnp->cn_nameptr)); 782 783 PUFFS_MSG_ALLOC(vn, create); 784 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 785 cnp, PUFFS_USE_FULLPNBUF(pmp)); 786 create_msg->pvnr_va = *ap->a_vap; 787 puffs_msg_setinfo(park_create, PUFFSOP_VN, 788 PUFFS_VN_CREATE, VPTOPNC(dvp)); 789 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 790 791 error = checkerr(pmp, error, __func__); 792 if (error) 793 goto out; 794 795 error = puffs_newnode(mp, dvp, ap->a_vpp, 796 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 797 if (error) { 798 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 799 create_msg->pvnr_newnode, cnp); 800 goto out; 801 } 802 803 if (PUFFS_USE_FS_TTL(pmp)) { 804 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 805 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 806 struct vattr *rvap = &create_msg->pvnr_va; 807 808 update_va(*ap->a_vpp, NULL, rvap, 809 va_ttl, cn_ttl, SETATTR_CHSIZE); 810 } 811 812 VPTOPP(*ap->a_vpp)->pn_nlookup++; 813 814 if (PUFFS_USE_DOTDOTCACHE(pmp) && 815 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 816 update_parent(*ap->a_vpp, dvp); 817 818 out: 819 DPRINTF(("puffs_create: return %d\n", error)); 820 PUFFS_MSG_RELEASE(create); 821 return error; 822 } 823 824 int 825 puffs_vnop_mknod(void *v) 826 { 827 struct vop_mknod_v3_args /* { 828 const struct vnodeop_desc *a_desc; 829 struct vnode *a_dvp; 830 struct vnode **a_vpp; 831 struct componentname *a_cnp; 832 struct vattr *a_vap; 833 } */ *ap = v; 834 PUFFS_MSG_VARS(vn, mknod); 835 struct vnode *dvp = ap->a_dvp; 836 struct puffs_node *dpn = VPTOPP(dvp); 837 struct componentname *cnp = ap->a_cnp; 838 struct mount *mp = dvp->v_mount; 839 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 840 int error; 841 842 PUFFS_MSG_ALLOC(vn, mknod); 843 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 844 cnp, PUFFS_USE_FULLPNBUF(pmp)); 845 mknod_msg->pvnr_va = *ap->a_vap; 846 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 847 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 848 849 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 850 851 error = checkerr(pmp, error, __func__); 852 if (error) 853 goto out; 854 855 error = puffs_newnode(mp, dvp, ap->a_vpp, 856 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 857 ap->a_vap->va_rdev); 858 if (error) { 859 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 860 mknod_msg->pvnr_newnode, cnp); 861 goto out; 862 } 863 864 if (PUFFS_USE_FS_TTL(pmp)) { 865 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 866 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 867 struct vattr *rvap = &mknod_msg->pvnr_va; 868 869 update_va(*ap->a_vpp, NULL, rvap, 870 va_ttl, cn_ttl, SETATTR_CHSIZE); 871 } 872 873 VPTOPP(*ap->a_vpp)->pn_nlookup++; 874 875 if (PUFFS_USE_DOTDOTCACHE(pmp) && 876 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 877 update_parent(*ap->a_vpp, dvp); 878 879 out: 880 PUFFS_MSG_RELEASE(mknod); 881 return error; 882 } 883 884 int 885 puffs_vnop_open(void *v) 886 { 887 struct vop_open_args /* { 888 const struct vnodeop_desc *a_desc; 889 struct vnode *a_vp; 890 int a_mode; 891 kauth_cred_t a_cred; 892 } */ *ap = v; 893 PUFFS_MSG_VARS(vn, open); 894 struct vnode *vp = ap->a_vp; 895 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 896 struct puffs_node *pn = VPTOPP(vp); 897 int mode = ap->a_mode; 898 int error; 899 900 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 901 902 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 903 ERROUT(EROFS); 904 905 if (!EXISTSOP(pmp, OPEN)) 906 ERROUT(0); 907 908 PUFFS_MSG_ALLOC(vn, open); 909 open_msg->pvnr_mode = mode; 910 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 911 puffs_msg_setinfo(park_open, PUFFSOP_VN, 912 PUFFS_VN_OPEN, VPTOPNC(vp)); 913 914 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 915 error = checkerr(pmp, error, __func__); 916 917 if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { 918 if (mode & FREAD) 919 pn->pn_stat |= PNODE_RDIRECT; 920 if (mode & FWRITE) 921 pn->pn_stat |= PNODE_WDIRECT; 922 } 923 out: 924 DPRINTF(("puffs_open: returning %d\n", error)); 925 PUFFS_MSG_RELEASE(open); 926 return error; 927 } 928 929 int 930 puffs_vnop_close(void *v) 931 { 932 struct vop_close_args /* { 933 const struct vnodeop_desc *a_desc; 934 struct vnode *a_vp; 935 int a_fflag; 936 kauth_cred_t a_cred; 937 } */ *ap = v; 938 PUFFS_MSG_VARS(vn, close); 939 struct vnode *vp = ap->a_vp; 940 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 941 942 PUFFS_MSG_ALLOC(vn, close); 943 puffs_msg_setfaf(park_close); 944 close_msg->pvnr_fflag = ap->a_fflag; 945 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 946 puffs_msg_setinfo(park_close, PUFFSOP_VN, 947 PUFFS_VN_CLOSE, VPTOPNC(vp)); 948 949 puffs_msg_enqueue(pmp, park_close); 950 PUFFS_MSG_RELEASE(close); 951 return 0; 952 } 953 954 int 955 puffs_vnop_access(void *v) 956 { 957 struct vop_access_args /* { 958 const struct vnodeop_desc *a_desc; 959 struct vnode *a_vp; 960 int a_mode; 961 kauth_cred_t a_cred; 962 } */ *ap = v; 963 PUFFS_MSG_VARS(vn, access); 964 struct vnode *vp = ap->a_vp; 965 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 966 int mode = ap->a_mode; 967 int error; 968 969 if (mode & VWRITE) { 970 switch (vp->v_type) { 971 case VDIR: 972 case VLNK: 973 case VREG: 974 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 975 || !EXISTSOP(pmp, WRITE)) 976 return EROFS; 977 break; 978 default: 979 break; 980 } 981 } 982 983 if (!EXISTSOP(pmp, ACCESS)) 984 return 0; 985 986 PUFFS_MSG_ALLOC(vn, access); 987 access_msg->pvnr_mode = ap->a_mode; 988 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 989 puffs_msg_setinfo(park_access, PUFFSOP_VN, 990 PUFFS_VN_ACCESS, VPTOPNC(vp)); 991 992 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 993 error = checkerr(pmp, error, __func__); 994 PUFFS_MSG_RELEASE(access); 995 996 return error; 997 } 998 999 static void 1000 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 1001 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 1002 { 1003 struct puffs_node *pn = VPTOPP(vp); 1004 1005 if (TTL_VALID(cn_ttl)) { 1006 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1007 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1008 } 1009 1010 /* 1011 * Don't listen to the file server regarding special device 1012 * size info, the file server doesn't know anything about them. 1013 */ 1014 if (vp->v_type == VBLK || vp->v_type == VCHR) 1015 rvap->va_size = vp->v_size; 1016 1017 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1018 if (vp->v_type == VBLK) 1019 rvap->va_blocksize = BLKDEV_IOSIZE; 1020 else if (vp->v_type == VCHR) 1021 rvap->va_blocksize = MAXBSIZE; 1022 1023 if (vap != NULL) { 1024 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1025 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1026 1027 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1028 vap->va_atime = pn->pn_mc_atime; 1029 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1030 vap->va_ctime = pn->pn_mc_ctime; 1031 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1032 vap->va_mtime = pn->pn_mc_mtime; 1033 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1034 vap->va_size = pn->pn_mc_size; 1035 } 1036 1037 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1038 if (rvap->va_size != VNOVAL 1039 && vp->v_type != VBLK && vp->v_type != VCHR) { 1040 uvm_vnp_setsize(vp, rvap->va_size); 1041 pn->pn_serversize = rvap->va_size; 1042 } 1043 } 1044 1045 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1046 if (pn->pn_va_cache == NULL) 1047 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1048 1049 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1050 1051 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1052 } 1053 } 1054 1055 static void 1056 update_parent(struct vnode *vp, struct vnode *dvp) 1057 { 1058 struct puffs_node *pn = VPTOPP(vp); 1059 1060 if (pn->pn_parent != NULL) { 1061 KASSERT(pn->pn_parent != dvp); 1062 vrele(pn->pn_parent); 1063 } 1064 1065 vref(dvp); 1066 pn->pn_parent = dvp; 1067 } 1068 1069 int 1070 puffs_vnop_getattr(void *v) 1071 { 1072 struct vop_getattr_args /* { 1073 const struct vnodeop_desc *a_desc; 1074 struct vnode *a_vp; 1075 struct vattr *a_vap; 1076 kauth_cred_t a_cred; 1077 } */ *ap = v; 1078 PUFFS_MSG_VARS(vn, getattr); 1079 struct vnode *vp = ap->a_vp; 1080 struct mount *mp = vp->v_mount; 1081 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1082 struct vattr *vap, *rvap; 1083 struct puffs_node *pn = VPTOPP(vp); 1084 struct timespec *va_ttl = NULL; 1085 int error = 0; 1086 1087 /* 1088 * A lock is required so that we do not race with 1089 * setattr, write and fsync when changing vp->v_size. 1090 * This is critical, since setting a stall smaler value 1091 * triggers a file truncate in uvm_vnp_setsize(), which 1092 * most of the time means data corruption (a chunk of 1093 * data is replaced by zeroes). This can be removed if 1094 * we decide one day that VOP_GETATTR must operate on 1095 * a locked vnode. 1096 * 1097 * XXX Should be useless now that VOP_GETATTR has been 1098 * fixed to always require a shared lock at least. 1099 */ 1100 mutex_enter(&pn->pn_sizemtx); 1101 1102 REFPN(pn); 1103 vap = ap->a_vap; 1104 1105 if (PUFFS_USE_FS_TTL(pmp)) { 1106 if (!TIMED_OUT(pn->pn_va_timeout)) { 1107 update_va(vp, vap, pn->pn_va_cache, 1108 NULL, NULL, SETATTR_CHSIZE); 1109 goto out2; 1110 } 1111 } 1112 1113 PUFFS_MSG_ALLOC(vn, getattr); 1114 vattr_null(&getattr_msg->pvnr_va); 1115 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1116 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1117 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1118 1119 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1120 error = checkerr(pmp, error, __func__); 1121 if (error) 1122 goto out; 1123 1124 rvap = &getattr_msg->pvnr_va; 1125 1126 if (PUFFS_USE_FS_TTL(pmp)) 1127 va_ttl = &getattr_msg->pvnr_va_ttl; 1128 1129 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1130 1131 out: 1132 PUFFS_MSG_RELEASE(getattr); 1133 1134 out2: 1135 puffs_releasenode(pn); 1136 1137 mutex_exit(&pn->pn_sizemtx); 1138 1139 return error; 1140 } 1141 1142 static int 1143 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1144 { 1145 PUFFS_MSG_VARS(vn, setattr); 1146 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1147 struct puffs_node *pn = vp->v_data; 1148 int error = 0; 1149 1150 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1151 1152 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1153 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1154 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1155 || vap->va_mode != (mode_t)VNOVAL)) 1156 return EROFS; 1157 1158 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1159 && vp->v_type == VREG && vap->va_size != VNOVAL) 1160 return EROFS; 1161 1162 /* 1163 * Flush metacache first. If we are called with some explicit 1164 * parameters, treat them as information overriding metacache 1165 * information. 1166 */ 1167 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1168 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1169 && vap->va_atime.tv_sec == VNOVAL) 1170 vap->va_atime = pn->pn_mc_atime; 1171 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1172 && vap->va_ctime.tv_sec == VNOVAL) 1173 vap->va_ctime = pn->pn_mc_ctime; 1174 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1175 && vap->va_mtime.tv_sec == VNOVAL) 1176 vap->va_mtime = pn->pn_mc_mtime; 1177 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1178 && vap->va_size == VNOVAL) 1179 vap->va_size = pn->pn_mc_size; 1180 1181 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1182 } 1183 1184 /* 1185 * Flush attribute cache so that another thread do 1186 * not get a stale value during the operation. 1187 */ 1188 if (PUFFS_USE_FS_TTL(pmp)) 1189 pn->pn_va_timeout = 0; 1190 1191 PUFFS_MSG_ALLOC(vn, setattr); 1192 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1193 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1194 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1195 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1196 if (flags & SETATTR_ASYNC) 1197 puffs_msg_setfaf(park_setattr); 1198 1199 puffs_msg_enqueue(pmp, park_setattr); 1200 if ((flags & SETATTR_ASYNC) == 0) 1201 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1202 1203 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1204 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1205 struct vattr *rvap = &setattr_msg->pvnr_va; 1206 1207 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1208 } 1209 1210 PUFFS_MSG_RELEASE(setattr); 1211 if ((flags & SETATTR_ASYNC) == 0) { 1212 error = checkerr(pmp, error, __func__); 1213 if (error) 1214 return error; 1215 } else { 1216 error = 0; 1217 } 1218 1219 if (vap->va_size != VNOVAL) { 1220 pn->pn_serversize = vap->va_size; 1221 if (flags & SETATTR_CHSIZE) 1222 uvm_vnp_setsize(vp, vap->va_size); 1223 } 1224 1225 return 0; 1226 } 1227 1228 int 1229 puffs_vnop_setattr(void *v) 1230 { 1231 struct vop_getattr_args /* { 1232 const struct vnodeop_desc *a_desc; 1233 struct vnode *a_vp; 1234 struct vattr *a_vap; 1235 kauth_cred_t a_cred; 1236 } */ *ap = v; 1237 struct puffs_node *pn = ap->a_vp->v_data; 1238 int error; 1239 1240 mutex_enter(&pn->pn_sizemtx); 1241 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1242 mutex_exit(&pn->pn_sizemtx); 1243 1244 return error; 1245 } 1246 1247 static __inline int 1248 doinact(struct puffs_mount *pmp, int iaflag) 1249 { 1250 1251 if (EXISTSOP(pmp, INACTIVE)) 1252 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1253 if (iaflag || ALLOPS(pmp)) 1254 return 1; 1255 else 1256 return 0; 1257 else 1258 return 1; 1259 else 1260 return 0; 1261 } 1262 1263 static void 1264 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1265 { 1266 PUFFS_MSG_VARS(vn, inactive); 1267 1268 if (doinact(pmp, iaflag)) { 1269 PUFFS_MSG_ALLOC(vn, inactive); 1270 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1271 PUFFS_VN_INACTIVE, ck); 1272 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1273 PUFFS_MSG_RELEASE(inactive); 1274 } 1275 } 1276 1277 /* XXX: callinactive can't setback */ 1278 int 1279 puffs_vnop_inactive(void *v) 1280 { 1281 struct vop_inactive_args /* { 1282 const struct vnodeop_desc *a_desc; 1283 struct vnode *a_vp; 1284 } */ *ap = v; 1285 PUFFS_MSG_VARS(vn, inactive); 1286 struct vnode *vp = ap->a_vp; 1287 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1288 struct puffs_node *pnode; 1289 bool recycle = false; 1290 1291 pnode = vp->v_data; 1292 mutex_enter(&pnode->pn_sizemtx); 1293 1294 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1295 flushvncache(vp, 0, 0, false); 1296 PUFFS_MSG_ALLOC(vn, inactive); 1297 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1298 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1299 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1300 NULL); 1301 PUFFS_MSG_RELEASE(inactive); 1302 } 1303 pnode->pn_stat &= ~PNODE_DOINACT; 1304 1305 /* 1306 * file server thinks it's gone? then don't be afraid care, 1307 * node's life was already all it would ever be 1308 */ 1309 if (pnode->pn_stat & PNODE_NOREFS) { 1310 pnode->pn_stat |= PNODE_DYING; 1311 recycle = true; 1312 } 1313 1314 /* 1315 * Handle node TTL. 1316 * If grace has already timed out, make it reclaimed. 1317 * Otherwise, we queue its expiration by sop thread, so 1318 * that it does not remain for ages in the freelist, 1319 * holding memory in userspace, while we will have 1320 * to look it up again anyway. 1321 */ 1322 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1323 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1324 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1325 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1326 1327 if (!incache && !ingrace && !reclaimqueued) { 1328 pnode->pn_stat |= PNODE_DYING; 1329 recycle = true; 1330 } 1331 1332 if (!recycle && !reclaimqueued) { 1333 struct puffs_sopreq *psopr; 1334 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1335 1336 KASSERT(curlwp != uvm.pagedaemon_lwp); 1337 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1338 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1339 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1340 psopr->psopr_at = at; 1341 1342 mutex_enter(&pmp->pmp_sopmtx); 1343 1344 /* 1345 * If thread has disapeared, just give up. The 1346 * fs is being unmounted and the node will be 1347 * be reclaimed anyway. 1348 * 1349 * Otherwise, we queue the request but do not 1350 * immediatly signal the thread, as the node 1351 * has not been expired yet. 1352 */ 1353 if (pmp->pmp_sopthrcount == 0) { 1354 kmem_free(psopr, sizeof(*psopr)); 1355 } else { 1356 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1357 psopr, psopr_entries); 1358 pnode->pn_stat |= PNODE_SOPEXP; 1359 } 1360 1361 mutex_exit(&pmp->pmp_sopmtx); 1362 } 1363 } 1364 1365 *ap->a_recycle = recycle; 1366 1367 mutex_exit(&pnode->pn_sizemtx); 1368 VOP_UNLOCK(vp); 1369 1370 return 0; 1371 } 1372 1373 static void 1374 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1375 { 1376 PUFFS_MSG_VARS(vn, reclaim); 1377 1378 if (!EXISTSOP(pmp, RECLAIM)) 1379 return; 1380 1381 PUFFS_MSG_ALLOC(vn, reclaim); 1382 reclaim_msg->pvnr_nlookup = nlookup; 1383 puffs_msg_setfaf(park_reclaim); 1384 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1385 1386 puffs_msg_enqueue(pmp, park_reclaim); 1387 PUFFS_MSG_RELEASE(reclaim); 1388 return; 1389 } 1390 1391 /* 1392 * always FAF, we don't really care if the server wants to fail to 1393 * reclaim the node or not 1394 */ 1395 int 1396 puffs_vnop_reclaim(void *v) 1397 { 1398 struct vop_reclaim_args /* { 1399 const struct vnodeop_desc *a_desc; 1400 struct vnode *a_vp; 1401 } */ *ap = v; 1402 struct vnode *vp = ap->a_vp; 1403 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1404 struct puffs_node *pnode = vp->v_data; 1405 bool notifyserver = true; 1406 1407 /* 1408 * first things first: check if someone is trying to reclaim the 1409 * root vnode. do not allow that to travel to userspace. 1410 * Note that we don't need to take the lock similarly to 1411 * puffs_root(), since there is only one of us. 1412 */ 1413 if (vp->v_vflag & VV_ROOT) { 1414 mutex_enter(&pmp->pmp_lock); 1415 KASSERT(pmp->pmp_root != NULL); 1416 pmp->pmp_root = NULL; 1417 mutex_exit(&pmp->pmp_lock); 1418 notifyserver = false; 1419 } 1420 1421 /* 1422 * purge info from kernel before issueing FAF, since we 1423 * don't really know when we'll get around to it after 1424 * that and someone might race us into node creation 1425 */ 1426 mutex_enter(&pmp->pmp_lock); 1427 LIST_REMOVE(pnode, pn_hashent); 1428 if (PUFFS_USE_NAMECACHE(pmp)) 1429 cache_purge(vp); 1430 mutex_exit(&pmp->pmp_lock); 1431 1432 if (notifyserver) { 1433 int nlookup = VPTOPP(vp)->pn_nlookup; 1434 1435 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1436 } 1437 1438 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1439 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1440 vrele(VPTOPP(vp)->pn_parent); 1441 else 1442 KASSERT(vp->v_vflag & VV_ROOT); 1443 } 1444 1445 puffs_putvnode(vp); 1446 vp->v_data = NULL; 1447 1448 return 0; 1449 } 1450 1451 #define CSIZE sizeof(**ap->a_cookies) 1452 int 1453 puffs_vnop_readdir(void *v) 1454 { 1455 struct vop_readdir_args /* { 1456 const struct vnodeop_desc *a_desc; 1457 struct vnode *a_vp; 1458 struct uio *a_uio; 1459 kauth_cred_t a_cred; 1460 int *a_eofflag; 1461 off_t **a_cookies; 1462 int *a_ncookies; 1463 } */ *ap = v; 1464 PUFFS_MSG_VARS(vn, readdir); 1465 struct vnode *vp = ap->a_vp; 1466 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1467 size_t argsize, tomove, cookiemem, cookiesmax; 1468 struct uio *uio = ap->a_uio; 1469 size_t howmuch, resid; 1470 int error; 1471 1472 /* 1473 * ok, so we need: resid + cookiemem = maxreq 1474 * => resid + cookiesize * (resid/minsize) = maxreq 1475 * => resid + cookiesize/minsize * resid = maxreq 1476 * => (cookiesize/minsize + 1) * resid = maxreq 1477 * => resid = maxreq / (cookiesize/minsize + 1) 1478 * 1479 * Since cookiesize <= minsize and we're not very big on floats, 1480 * we approximate that to be 1. Therefore: 1481 * 1482 * resid = maxreq / 2; 1483 * 1484 * Well, at least we didn't have to use differential equations 1485 * or the Gram-Schmidt process. 1486 * 1487 * (yes, I'm very afraid of this) 1488 */ 1489 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1490 1491 if (ap->a_cookies) { 1492 KASSERT(ap->a_ncookies != NULL); 1493 if (pmp->pmp_args.pa_fhsize == 0) 1494 return EOPNOTSUPP; 1495 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1496 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1497 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1498 } else { 1499 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1500 cookiesmax = 0; 1501 cookiemem = 0; 1502 } 1503 1504 argsize = sizeof(struct puffs_vnmsg_readdir); 1505 tomove = resid + cookiemem; 1506 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1507 (void *)&readdir_msg, 1); 1508 1509 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1510 readdir_msg->pvnr_offset = uio->uio_offset; 1511 readdir_msg->pvnr_resid = resid; 1512 readdir_msg->pvnr_ncookies = cookiesmax; 1513 readdir_msg->pvnr_eofflag = 0; 1514 readdir_msg->pvnr_dentoff = cookiemem; 1515 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1516 PUFFS_VN_READDIR, VPTOPNC(vp)); 1517 puffs_msg_setdelta(park_readdir, tomove); 1518 1519 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1520 error = checkerr(pmp, error, __func__); 1521 if (error) 1522 goto out; 1523 1524 /* userspace is cheating? */ 1525 if (readdir_msg->pvnr_resid > resid) { 1526 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1527 "resid grew", VPTOPNC(vp)); 1528 ERROUT(EPROTO); 1529 } 1530 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1531 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1532 "too many cookies", VPTOPNC(vp)); 1533 ERROUT(EPROTO); 1534 } 1535 1536 /* check eof */ 1537 if (readdir_msg->pvnr_eofflag) 1538 *ap->a_eofflag = 1; 1539 1540 /* bouncy-wouncy with the directory data */ 1541 howmuch = resid - readdir_msg->pvnr_resid; 1542 1543 /* force eof if no data was returned (getcwd() needs this) */ 1544 if (howmuch == 0) { 1545 *ap->a_eofflag = 1; 1546 goto out; 1547 } 1548 1549 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1550 if (error) 1551 goto out; 1552 1553 /* provide cookies to caller if so desired */ 1554 if (ap->a_cookies) { 1555 KASSERT(curlwp != uvm.pagedaemon_lwp); 1556 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1557 M_TEMP, M_WAITOK); 1558 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1559 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1560 *ap->a_ncookies*CSIZE); 1561 } 1562 1563 /* next readdir starts here */ 1564 uio->uio_offset = readdir_msg->pvnr_offset; 1565 1566 out: 1567 puffs_msgmem_release(park_readdir); 1568 return error; 1569 } 1570 #undef CSIZE 1571 1572 /* 1573 * poll works by consuming the bitmask in pn_revents. If there are 1574 * events available, poll returns immediately. If not, it issues a 1575 * poll to userspace, selrecords itself and returns with no available 1576 * events. When the file server returns, it executes puffs_parkdone_poll(), 1577 * where available events are added to the bitmask. selnotify() is 1578 * then also executed by that function causing us to enter here again 1579 * and hopefully find the missing bits (unless someone got them first, 1580 * in which case it starts all over again). 1581 */ 1582 int 1583 puffs_vnop_poll(void *v) 1584 { 1585 struct vop_poll_args /* { 1586 const struct vnodeop_desc *a_desc; 1587 struct vnode *a_vp; 1588 int a_events; 1589 } */ *ap = v; 1590 PUFFS_MSG_VARS(vn, poll); 1591 struct vnode *vp = ap->a_vp; 1592 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1593 struct puffs_node *pn = vp->v_data; 1594 int events; 1595 1596 if (EXISTSOP(pmp, POLL)) { 1597 mutex_enter(&pn->pn_mtx); 1598 events = pn->pn_revents & ap->a_events; 1599 if (events & ap->a_events) { 1600 pn->pn_revents &= ~ap->a_events; 1601 mutex_exit(&pn->pn_mtx); 1602 1603 return events; 1604 } else { 1605 puffs_referencenode(pn); 1606 mutex_exit(&pn->pn_mtx); 1607 1608 PUFFS_MSG_ALLOC(vn, poll); 1609 poll_msg->pvnr_events = ap->a_events; 1610 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1611 PUFFS_VN_POLL, VPTOPNC(vp)); 1612 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1613 selrecord(curlwp, &pn->pn_sel); 1614 1615 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1616 vp->v_data, NULL); 1617 PUFFS_MSG_RELEASE(poll); 1618 1619 return 0; 1620 } 1621 } else { 1622 return genfs_poll(v); 1623 } 1624 } 1625 1626 static int 1627 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1628 { 1629 struct puffs_node *pn = VPTOPP(vp); 1630 struct vattr va; 1631 int pflags, error; 1632 1633 /* flush out information from our metacache, see vop_setattr */ 1634 if (pn->pn_stat & PNODE_METACACHE_MASK 1635 && (pn->pn_stat & PNODE_DYING) == 0) { 1636 vattr_null(&va); 1637 error = dosetattr(vp, &va, FSCRED, 1638 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1639 if (error) 1640 return error; 1641 } 1642 1643 /* 1644 * flush pages to avoid being overly dirty 1645 */ 1646 pflags = PGO_CLEANIT; 1647 if (wait) 1648 pflags |= PGO_SYNCIO; 1649 1650 mutex_enter(vp->v_interlock); 1651 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1652 } 1653 1654 int 1655 puffs_vnop_fsync(void *v) 1656 { 1657 struct vop_fsync_args /* { 1658 const struct vnodeop_desc *a_desc; 1659 struct vnode *a_vp; 1660 kauth_cred_t a_cred; 1661 int a_flags; 1662 off_t a_offlo; 1663 off_t a_offhi; 1664 } */ *ap = v; 1665 PUFFS_MSG_VARS(vn, fsync); 1666 struct vnode *vp; 1667 struct puffs_node *pn; 1668 struct puffs_mount *pmp; 1669 int error, dofaf; 1670 1671 vp = ap->a_vp; 1672 KASSERT(vp != NULL); 1673 pn = VPTOPP(vp); 1674 KASSERT(pn != NULL); 1675 pmp = MPTOPUFFSMP(vp->v_mount); 1676 if (ap->a_flags & FSYNC_WAIT) { 1677 mutex_enter(&pn->pn_sizemtx); 1678 } else { 1679 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1680 return EDEADLK; 1681 } 1682 1683 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1684 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1685 if (error) 1686 goto out; 1687 1688 /* 1689 * HELLO! We exit already here if the user server does not 1690 * support fsync OR if we should call fsync for a node which 1691 * has references neither in the kernel or the fs server. 1692 * Otherwise we continue to issue fsync() forward. 1693 */ 1694 error = 0; 1695 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1696 goto out; 1697 1698 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1699 /* 1700 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1701 * only FAFs for those. Otherwise there's a danger of deadlock, 1702 * since the execution context here might be the user server 1703 * doing some operation on another fs, which in turn caused a 1704 * vnode to be reclaimed from the freelist for this fs. 1705 */ 1706 if (dofaf == 0) { 1707 mutex_enter(vp->v_interlock); 1708 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1709 dofaf = 1; 1710 mutex_exit(vp->v_interlock); 1711 } 1712 1713 PUFFS_MSG_ALLOC(vn, fsync); 1714 if (dofaf) 1715 puffs_msg_setfaf(park_fsync); 1716 1717 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1718 fsync_msg->pvnr_flags = ap->a_flags; 1719 fsync_msg->pvnr_offlo = ap->a_offlo; 1720 fsync_msg->pvnr_offhi = ap->a_offhi; 1721 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1722 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1723 1724 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1725 PUFFS_MSG_RELEASE(fsync); 1726 1727 error = checkerr(pmp, error, __func__); 1728 1729 out: 1730 mutex_exit(&pn->pn_sizemtx); 1731 return error; 1732 } 1733 1734 int 1735 puffs_vnop_seek(void *v) 1736 { 1737 struct vop_seek_args /* { 1738 const struct vnodeop_desc *a_desc; 1739 struct vnode *a_vp; 1740 off_t a_oldoff; 1741 off_t a_newoff; 1742 kauth_cred_t a_cred; 1743 } */ *ap = v; 1744 PUFFS_MSG_VARS(vn, seek); 1745 struct vnode *vp = ap->a_vp; 1746 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1747 int error; 1748 1749 PUFFS_MSG_ALLOC(vn, seek); 1750 seek_msg->pvnr_oldoff = ap->a_oldoff; 1751 seek_msg->pvnr_newoff = ap->a_newoff; 1752 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1753 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1754 PUFFS_VN_SEEK, VPTOPNC(vp)); 1755 1756 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1757 PUFFS_MSG_RELEASE(seek); 1758 return checkerr(pmp, error, __func__); 1759 } 1760 1761 static int 1762 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1763 struct componentname *cnp) 1764 { 1765 PUFFS_MSG_VARS(vn, remove); 1766 int error; 1767 1768 PUFFS_MSG_ALLOC(vn, remove); 1769 remove_msg->pvnr_cookie_targ = ck; 1770 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1771 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1772 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1773 1774 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1775 PUFFS_MSG_RELEASE(remove); 1776 1777 return checkerr(pmp, error, __func__); 1778 } 1779 1780 /* 1781 * XXX: can't use callremove now because can't catch setbacks with 1782 * it due to lack of a pnode argument. 1783 */ 1784 int 1785 puffs_vnop_remove(void *v) 1786 { 1787 struct vop_remove_args /* { 1788 const struct vnodeop_desc *a_desc; 1789 struct vnode *a_dvp; 1790 struct vnode *a_vp; 1791 struct componentname *a_cnp; 1792 } */ *ap = v; 1793 PUFFS_MSG_VARS(vn, remove); 1794 struct vnode *dvp = ap->a_dvp; 1795 struct vnode *vp = ap->a_vp; 1796 struct puffs_node *dpn = VPTOPP(dvp); 1797 struct puffs_node *pn = VPTOPP(vp); 1798 struct componentname *cnp = ap->a_cnp; 1799 struct mount *mp = dvp->v_mount; 1800 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1801 int error; 1802 1803 PUFFS_MSG_ALLOC(vn, remove); 1804 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1805 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1806 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1807 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1808 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1809 1810 puffs_msg_enqueue(pmp, park_remove); 1811 REFPN_AND_UNLOCKVP(dvp, dpn); 1812 if (dvp == vp) 1813 REFPN(pn); 1814 else 1815 REFPN_AND_UNLOCKVP(vp, pn); 1816 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1817 1818 PUFFS_MSG_RELEASE(remove); 1819 1820 RELEPN_AND_VP(dvp, dpn); 1821 RELEPN_AND_VP(vp, pn); 1822 1823 error = checkerr(pmp, error, __func__); 1824 return error; 1825 } 1826 1827 int 1828 puffs_vnop_mkdir(void *v) 1829 { 1830 struct vop_mkdir_v3_args /* { 1831 const struct vnodeop_desc *a_desc; 1832 struct vnode *a_dvp; 1833 struct vnode **a_vpp; 1834 struct componentname *a_cnp; 1835 struct vattr *a_vap; 1836 } */ *ap = v; 1837 PUFFS_MSG_VARS(vn, mkdir); 1838 struct vnode *dvp = ap->a_dvp; 1839 struct puffs_node *dpn = VPTOPP(dvp); 1840 struct componentname *cnp = ap->a_cnp; 1841 struct mount *mp = dvp->v_mount; 1842 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1843 int error; 1844 1845 PUFFS_MSG_ALLOC(vn, mkdir); 1846 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1847 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1848 mkdir_msg->pvnr_va = *ap->a_vap; 1849 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1850 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1851 1852 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1853 1854 error = checkerr(pmp, error, __func__); 1855 if (error) 1856 goto out; 1857 1858 error = puffs_newnode(mp, dvp, ap->a_vpp, 1859 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1860 if (error) { 1861 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1862 mkdir_msg->pvnr_newnode, cnp); 1863 goto out; 1864 } 1865 1866 if (PUFFS_USE_FS_TTL(pmp)) { 1867 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1868 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1869 struct vattr *rvap = &mkdir_msg->pvnr_va; 1870 1871 update_va(*ap->a_vpp, NULL, rvap, 1872 va_ttl, cn_ttl, SETATTR_CHSIZE); 1873 } 1874 1875 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1876 1877 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1878 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1879 update_parent(*ap->a_vpp, dvp); 1880 1881 out: 1882 PUFFS_MSG_RELEASE(mkdir); 1883 return error; 1884 } 1885 1886 static int 1887 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1888 struct componentname *cnp) 1889 { 1890 PUFFS_MSG_VARS(vn, rmdir); 1891 int error; 1892 1893 PUFFS_MSG_ALLOC(vn, rmdir); 1894 rmdir_msg->pvnr_cookie_targ = ck; 1895 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1896 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1897 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1898 1899 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1900 PUFFS_MSG_RELEASE(rmdir); 1901 1902 return checkerr(pmp, error, __func__); 1903 } 1904 1905 int 1906 puffs_vnop_rmdir(void *v) 1907 { 1908 struct vop_rmdir_args /* { 1909 const struct vnodeop_desc *a_desc; 1910 struct vnode *a_dvp; 1911 struct vnode *a_vp; 1912 struct componentname *a_cnp; 1913 } */ *ap = v; 1914 PUFFS_MSG_VARS(vn, rmdir); 1915 struct vnode *dvp = ap->a_dvp; 1916 struct vnode *vp = ap->a_vp; 1917 struct puffs_node *dpn = VPTOPP(dvp); 1918 struct puffs_node *pn = VPTOPP(vp); 1919 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1920 struct componentname *cnp = ap->a_cnp; 1921 int error; 1922 1923 PUFFS_MSG_ALLOC(vn, rmdir); 1924 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1925 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1926 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1927 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1928 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1929 1930 puffs_msg_enqueue(pmp, park_rmdir); 1931 REFPN_AND_UNLOCKVP(dvp, dpn); 1932 REFPN_AND_UNLOCKVP(vp, pn); 1933 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1934 1935 PUFFS_MSG_RELEASE(rmdir); 1936 1937 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1938 RELEPN_AND_VP(dvp, dpn); 1939 RELEPN_AND_VP(vp, pn); 1940 1941 return error; 1942 } 1943 1944 int 1945 puffs_vnop_link(void *v) 1946 { 1947 struct vop_link_args /* { 1948 const struct vnodeop_desc *a_desc; 1949 struct vnode *a_dvp; 1950 struct vnode *a_vp; 1951 struct componentname *a_cnp; 1952 } */ *ap = v; 1953 PUFFS_MSG_VARS(vn, link); 1954 struct vnode *dvp = ap->a_dvp; 1955 struct vnode *vp = ap->a_vp; 1956 struct puffs_node *dpn = VPTOPP(dvp); 1957 struct puffs_node *pn = VPTOPP(vp); 1958 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1959 struct componentname *cnp = ap->a_cnp; 1960 int error; 1961 1962 PUFFS_MSG_ALLOC(vn, link); 1963 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1964 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1965 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1966 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1967 PUFFS_VN_LINK, VPTOPNC(dvp)); 1968 1969 puffs_msg_enqueue(pmp, park_link); 1970 REFPN_AND_UNLOCKVP(dvp, dpn); 1971 REFPN(pn); 1972 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1973 1974 PUFFS_MSG_RELEASE(link); 1975 1976 error = checkerr(pmp, error, __func__); 1977 1978 /* 1979 * XXX: stay in touch with the cache. I don't like this, but 1980 * don't have a better solution either. See also puffs_rename(). 1981 */ 1982 if (error == 0) 1983 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1984 1985 RELEPN_AND_VP(dvp, dpn); 1986 puffs_releasenode(pn); 1987 1988 return error; 1989 } 1990 1991 int 1992 puffs_vnop_symlink(void *v) 1993 { 1994 struct vop_symlink_v3_args /* { 1995 const struct vnodeop_desc *a_desc; 1996 struct vnode *a_dvp; 1997 struct vnode **a_vpp; 1998 struct componentname *a_cnp; 1999 struct vattr *a_vap; 2000 char *a_target; 2001 } */ *ap = v; 2002 PUFFS_MSG_VARS(vn, symlink); 2003 struct vnode *dvp = ap->a_dvp; 2004 struct puffs_node *dpn = VPTOPP(dvp); 2005 struct mount *mp = dvp->v_mount; 2006 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2007 struct componentname *cnp = ap->a_cnp; 2008 int error; 2009 2010 *ap->a_vpp = NULL; 2011 2012 PUFFS_MSG_ALLOC(vn, symlink); 2013 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2014 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2015 symlink_msg->pvnr_va = *ap->a_vap; 2016 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2017 sizeof(symlink_msg->pvnr_link)); 2018 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2019 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2020 2021 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2022 2023 error = checkerr(pmp, error, __func__); 2024 if (error) 2025 goto out; 2026 2027 error = puffs_newnode(mp, dvp, ap->a_vpp, 2028 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2029 if (error) { 2030 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2031 symlink_msg->pvnr_newnode, cnp); 2032 goto out; 2033 } 2034 2035 if (PUFFS_USE_FS_TTL(pmp)) { 2036 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2037 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2038 struct vattr *rvap = &symlink_msg->pvnr_va; 2039 2040 update_va(*ap->a_vpp, NULL, rvap, 2041 va_ttl, cn_ttl, SETATTR_CHSIZE); 2042 } 2043 2044 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2045 2046 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2047 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2048 update_parent(*ap->a_vpp, dvp); 2049 2050 out: 2051 PUFFS_MSG_RELEASE(symlink); 2052 2053 return error; 2054 } 2055 2056 int 2057 puffs_vnop_readlink(void *v) 2058 { 2059 struct vop_readlink_args /* { 2060 const struct vnodeop_desc *a_desc; 2061 struct vnode *a_vp; 2062 struct uio *a_uio; 2063 kauth_cred_t a_cred; 2064 } */ *ap = v; 2065 PUFFS_MSG_VARS(vn, readlink); 2066 struct vnode *vp = ap->a_vp; 2067 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2068 size_t linklen; 2069 int error; 2070 2071 PUFFS_MSG_ALLOC(vn, readlink); 2072 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2073 linklen = sizeof(readlink_msg->pvnr_link); 2074 readlink_msg->pvnr_linklen = linklen; 2075 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2076 PUFFS_VN_READLINK, VPTOPNC(vp)); 2077 2078 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2079 error = checkerr(pmp, error, __func__); 2080 if (error) 2081 goto out; 2082 2083 /* bad bad user file server */ 2084 if (readlink_msg->pvnr_linklen > linklen) { 2085 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2086 "linklen too big", VPTOPNC(ap->a_vp)); 2087 error = EPROTO; 2088 goto out; 2089 } 2090 2091 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2092 ap->a_uio); 2093 out: 2094 PUFFS_MSG_RELEASE(readlink); 2095 return error; 2096 } 2097 2098 int 2099 puffs_vnop_rename(void *v) 2100 { 2101 struct vop_rename_args /* { 2102 const struct vnodeop_desc *a_desc; 2103 struct vnode *a_fdvp; 2104 struct vnode *a_fvp; 2105 struct componentname *a_fcnp; 2106 struct vnode *a_tdvp; 2107 struct vnode *a_tvp; 2108 struct componentname *a_tcnp; 2109 } */ *ap = v; 2110 PUFFS_MSG_VARS(vn, rename); 2111 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2112 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2113 struct puffs_node *fpn = ap->a_fvp->v_data; 2114 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2115 int error; 2116 bool doabort = true; 2117 2118 if ((fvp->v_mount != tdvp->v_mount) || 2119 (tvp && (fvp->v_mount != tvp->v_mount))) { 2120 ERROUT(EXDEV); 2121 } 2122 2123 PUFFS_MSG_ALLOC(vn, rename); 2124 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2125 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2126 if (tvp) 2127 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2128 else 2129 rename_msg->pvnr_cookie_targ = NULL; 2130 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2131 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2132 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2133 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2134 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2135 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2136 2137 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2138 doabort = false; 2139 PUFFS_MSG_RELEASE(rename); 2140 error = checkerr(pmp, error, __func__); 2141 2142 /* 2143 * XXX: stay in touch with the cache. I don't like this, but 2144 * don't have a better solution either. See also puffs_link(). 2145 */ 2146 if (error == 0) { 2147 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2148 2149 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2150 (VPTOPP(fvp)->pn_parent != tdvp)) 2151 update_parent(fvp, tdvp); 2152 } 2153 2154 2155 out: 2156 if (doabort) 2157 VOP_ABORTOP(tdvp, ap->a_tcnp); 2158 if (tvp != NULL) 2159 vput(tvp); 2160 if (tdvp == tvp) 2161 vrele(tdvp); 2162 else 2163 vput(tdvp); 2164 2165 if (doabort) 2166 VOP_ABORTOP(fdvp, ap->a_fcnp); 2167 vrele(fdvp); 2168 vrele(fvp); 2169 2170 return error; 2171 } 2172 2173 #define RWARGS(cont, iofl, move, offset, creds) \ 2174 (cont)->pvnr_ioflag = (iofl); \ 2175 (cont)->pvnr_resid = (move); \ 2176 (cont)->pvnr_offset = (offset); \ 2177 puffs_credcvt(&(cont)->pvnr_cred, creds) 2178 2179 int 2180 puffs_vnop_read(void *v) 2181 { 2182 struct vop_read_args /* { 2183 const struct vnodeop_desc *a_desc; 2184 struct vnode *a_vp; 2185 struct uio *a_uio; 2186 int a_ioflag; 2187 kauth_cred_t a_cred; 2188 } */ *ap = v; 2189 PUFFS_MSG_VARS(vn, read); 2190 struct vnode *vp = ap->a_vp; 2191 struct puffs_node *pn = VPTOPP(vp); 2192 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2193 struct uio *uio = ap->a_uio; 2194 size_t tomove, argsize; 2195 vsize_t bytelen; 2196 int error; 2197 2198 read_msg = NULL; 2199 error = 0; 2200 2201 /* std sanity */ 2202 if (uio->uio_resid == 0) 2203 return 0; 2204 if (uio->uio_offset < 0) 2205 return EINVAL; 2206 2207 if (vp->v_type == VREG && 2208 PUFFS_USE_PAGECACHE(pmp) && 2209 !(pn->pn_stat & PNODE_RDIRECT)) { 2210 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2211 2212 while (uio->uio_resid > 0) { 2213 if (vp->v_size <= uio->uio_offset) { 2214 break; 2215 } 2216 bytelen = MIN(uio->uio_resid, 2217 vp->v_size - uio->uio_offset); 2218 if (bytelen == 0) 2219 break; 2220 2221 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2222 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2223 if (error) 2224 break; 2225 } 2226 2227 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2228 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2229 } else { 2230 /* 2231 * in case it's not a regular file or we're operating 2232 * uncached, do read in the old-fashioned style, 2233 * i.e. explicit read operations 2234 */ 2235 2236 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2237 argsize = sizeof(struct puffs_vnmsg_read); 2238 puffs_msgmem_alloc(argsize + tomove, &park_read, 2239 (void *)&read_msg, 1); 2240 2241 error = 0; 2242 while (uio->uio_resid > 0) { 2243 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2244 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2245 RWARGS(read_msg, ap->a_ioflag, tomove, 2246 uio->uio_offset, ap->a_cred); 2247 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2248 PUFFS_VN_READ, VPTOPNC(vp)); 2249 puffs_msg_setdelta(park_read, tomove); 2250 2251 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2252 NULL, error); 2253 error = checkerr(pmp, error, __func__); 2254 if (error) 2255 break; 2256 2257 if (read_msg->pvnr_resid > tomove) { 2258 puffs_senderr(pmp, PUFFS_ERR_READ, 2259 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2260 error = EPROTO; 2261 break; 2262 } 2263 2264 error = uiomove(read_msg->pvnr_data, 2265 tomove - read_msg->pvnr_resid, uio); 2266 2267 /* 2268 * in case the file is out of juice, resid from 2269 * userspace is != 0. and the error-case is 2270 * quite obvious 2271 */ 2272 if (error || read_msg->pvnr_resid) 2273 break; 2274 } 2275 2276 puffs_msgmem_release(park_read); 2277 } 2278 2279 return error; 2280 } 2281 2282 /* 2283 * XXX: in case of a failure, this leaves uio in a bad state. 2284 * We could theoretically copy the uio and iovecs and "replay" 2285 * them the right amount after the userspace trip, but don't 2286 * bother for now. 2287 */ 2288 int 2289 puffs_vnop_write(void *v) 2290 { 2291 struct vop_write_args /* { 2292 const struct vnodeop_desc *a_desc; 2293 struct vnode *a_vp; 2294 struct uio *a_uio; 2295 int a_ioflag; 2296 kauth_cred_t a_cred; 2297 } */ *ap = v; 2298 PUFFS_MSG_VARS(vn, write); 2299 struct vnode *vp = ap->a_vp; 2300 struct puffs_node *pn = VPTOPP(vp); 2301 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2302 struct uio *uio = ap->a_uio; 2303 size_t tomove, argsize; 2304 off_t oldoff, newoff, origoff; 2305 vsize_t bytelen; 2306 int error, uflags; 2307 int ubcflags; 2308 2309 error = uflags = 0; 2310 write_msg = NULL; 2311 2312 mutex_enter(&pn->pn_sizemtx); 2313 2314 if (vp->v_type == VREG && 2315 PUFFS_USE_PAGECACHE(pmp) && 2316 !(pn->pn_stat & PNODE_WDIRECT)) { 2317 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2318 2319 /* 2320 * userspace *should* be allowed to control this, 2321 * but with UBC it's a bit unclear how to handle it 2322 */ 2323 if (ap->a_ioflag & IO_APPEND) 2324 uio->uio_offset = vp->v_size; 2325 2326 origoff = uio->uio_offset; 2327 while (uio->uio_resid > 0) { 2328 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2329 uflags |= PUFFS_UPDATEATIME; 2330 uflags |= PUFFS_UPDATECTIME; 2331 uflags |= PUFFS_UPDATEMTIME; 2332 oldoff = uio->uio_offset; 2333 bytelen = uio->uio_resid; 2334 2335 newoff = oldoff + bytelen; 2336 if (vp->v_size < newoff) { 2337 uvm_vnp_setwritesize(vp, newoff); 2338 } 2339 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2340 UVM_ADV_RANDOM, ubcflags); 2341 2342 /* 2343 * In case of a ubc_uiomove() error, 2344 * opt to not extend the file at all and 2345 * return an error. Otherwise, if we attempt 2346 * to clear the memory we couldn't fault to, 2347 * we might generate a kernel page fault. 2348 */ 2349 if (vp->v_size < newoff) { 2350 if (error == 0) { 2351 uflags |= PUFFS_UPDATESIZE; 2352 uvm_vnp_setsize(vp, newoff); 2353 } else { 2354 uvm_vnp_setwritesize(vp, vp->v_size); 2355 } 2356 } 2357 if (error) 2358 break; 2359 2360 /* 2361 * If we're writing large files, flush to file server 2362 * every 64k. Otherwise we can very easily exhaust 2363 * kernel and user memory, as the file server cannot 2364 * really keep up with our writing speed. 2365 * 2366 * Note: this does *NOT* honor MNT_ASYNC, because 2367 * that gives userland too much say in the kernel. 2368 */ 2369 if (oldoff >> 16 != uio->uio_offset >> 16) { 2370 mutex_enter(vp->v_interlock); 2371 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2372 uio->uio_offset & ~0xffff, 2373 PGO_CLEANIT | PGO_SYNCIO); 2374 if (error) 2375 break; 2376 } 2377 } 2378 2379 /* synchronous I/O? */ 2380 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2381 mutex_enter(vp->v_interlock); 2382 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2383 round_page(uio->uio_offset), 2384 PGO_CLEANIT | PGO_SYNCIO); 2385 2386 /* write through page cache? */ 2387 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2388 mutex_enter(vp->v_interlock); 2389 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2390 round_page(uio->uio_offset), PGO_CLEANIT); 2391 } 2392 2393 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2394 } else { 2395 /* tomove is non-increasing */ 2396 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2397 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2398 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2399 2400 while (uio->uio_resid > 0) { 2401 /* move data to buffer */ 2402 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2403 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2404 RWARGS(write_msg, ap->a_ioflag, tomove, 2405 uio->uio_offset, ap->a_cred); 2406 error = uiomove(write_msg->pvnr_data, tomove, uio); 2407 if (error) 2408 break; 2409 2410 /* move buffer to userspace */ 2411 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2412 PUFFS_VN_WRITE, VPTOPNC(vp)); 2413 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2414 NULL, error); 2415 error = checkerr(pmp, error, __func__); 2416 if (error) 2417 break; 2418 2419 if (write_msg->pvnr_resid > tomove) { 2420 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2421 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2422 error = EPROTO; 2423 break; 2424 } 2425 2426 /* adjust file size */ 2427 if (vp->v_size < uio->uio_offset) 2428 uvm_vnp_setsize(vp, uio->uio_offset); 2429 2430 /* didn't move everything? bad userspace. bail */ 2431 if (write_msg->pvnr_resid != 0) { 2432 error = EIO; 2433 break; 2434 } 2435 } 2436 puffs_msgmem_release(park_write); 2437 } 2438 2439 mutex_exit(&pn->pn_sizemtx); 2440 return error; 2441 } 2442 2443 int 2444 puffs_vnop_print(void *v) 2445 { 2446 struct vop_print_args /* { 2447 struct vnode *a_vp; 2448 } */ *ap = v; 2449 PUFFS_MSG_VARS(vn, print); 2450 struct vnode *vp = ap->a_vp; 2451 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2452 struct puffs_node *pn = vp->v_data; 2453 2454 /* kernel portion */ 2455 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2456 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2457 if (vp->v_type == VFIFO) 2458 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2459 printf("\n"); 2460 2461 /* userspace portion */ 2462 if (EXISTSOP(pmp, PRINT)) { 2463 PUFFS_MSG_ALLOC(vn, print); 2464 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2465 PUFFS_VN_PRINT, VPTOPNC(vp)); 2466 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2467 NULL); 2468 PUFFS_MSG_RELEASE(print); 2469 } 2470 2471 return 0; 2472 } 2473 2474 int 2475 puffs_vnop_pathconf(void *v) 2476 { 2477 struct vop_pathconf_args /* { 2478 const struct vnodeop_desc *a_desc; 2479 struct vnode *a_vp; 2480 int a_name; 2481 register_t *a_retval; 2482 } */ *ap = v; 2483 PUFFS_MSG_VARS(vn, pathconf); 2484 struct vnode *vp = ap->a_vp; 2485 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2486 int error; 2487 2488 PUFFS_MSG_ALLOC(vn, pathconf); 2489 pathconf_msg->pvnr_name = ap->a_name; 2490 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2491 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2492 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2493 error = checkerr(pmp, error, __func__); 2494 if (!error) 2495 *ap->a_retval = pathconf_msg->pvnr_retval; 2496 PUFFS_MSG_RELEASE(pathconf); 2497 2498 return error; 2499 } 2500 2501 int 2502 puffs_vnop_advlock(void *v) 2503 { 2504 struct vop_advlock_args /* { 2505 const struct vnodeop_desc *a_desc; 2506 struct vnode *a_vp; 2507 void *a_id; 2508 int a_op; 2509 struct flock *a_fl; 2510 int a_flags; 2511 } */ *ap = v; 2512 PUFFS_MSG_VARS(vn, advlock); 2513 struct vnode *vp = ap->a_vp; 2514 struct puffs_node *pn = VPTOPP(vp); 2515 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2516 int error; 2517 2518 if (!EXISTSOP(pmp, ADVLOCK)) 2519 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2520 2521 PUFFS_MSG_ALLOC(vn, advlock); 2522 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2523 sizeof(advlock_msg->pvnr_fl)); 2524 advlock_msg->pvnr_id = ap->a_id; 2525 advlock_msg->pvnr_op = ap->a_op; 2526 advlock_msg->pvnr_flags = ap->a_flags; 2527 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2528 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2529 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2530 error = checkerr(pmp, error, __func__); 2531 PUFFS_MSG_RELEASE(advlock); 2532 2533 return error; 2534 } 2535 2536 int 2537 puffs_vnop_abortop(void *v) 2538 { 2539 struct vop_abortop_args /* { 2540 struct vnode *a_dvp; 2541 struct componentname *a_cnp; 2542 }; */ *ap = v; 2543 PUFFS_MSG_VARS(vn, abortop); 2544 struct vnode *dvp = ap->a_dvp; 2545 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2546 struct componentname *cnp = ap->a_cnp; 2547 2548 if (EXISTSOP(pmp, ABORTOP)) { 2549 PUFFS_MSG_ALLOC(vn, abortop); 2550 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2551 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2552 puffs_msg_setfaf(park_abortop); 2553 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2554 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2555 2556 puffs_msg_enqueue(pmp, park_abortop); 2557 PUFFS_MSG_RELEASE(abortop); 2558 } 2559 2560 return genfs_abortop(v); 2561 } 2562 2563 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2564 2565 /* 2566 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2567 */ 2568 int 2569 puffs_vnop_strategy(void *v) 2570 { 2571 struct vop_strategy_args /* { 2572 const struct vnodeop_desc *a_desc; 2573 struct vnode *a_vp; 2574 struct buf *a_bp; 2575 } */ *ap = v; 2576 PUFFS_MSG_VARS(vn, rw); 2577 struct vnode *vp = ap->a_vp; 2578 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2579 struct puffs_node *pn; 2580 struct buf *bp; 2581 size_t argsize; 2582 size_t tomove, moved; 2583 int error, dofaf, cansleep, dobiodone; 2584 2585 pmp = MPTOPUFFSMP(vp->v_mount); 2586 bp = ap->a_bp; 2587 error = 0; 2588 dofaf = 0; 2589 cansleep = 0; 2590 pn = VPTOPP(vp); 2591 park_rw = NULL; /* explicit */ 2592 dobiodone = 1; 2593 2594 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2595 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2596 ERROUT(EOPNOTSUPP); 2597 2598 /* 2599 * Short-circuit optimization: don't flush buffer in between 2600 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2601 */ 2602 if (pn->pn_stat & PNODE_DYING) { 2603 KASSERT(BUF_ISWRITE(bp)); 2604 bp->b_resid = 0; 2605 goto out; 2606 } 2607 2608 #ifdef DIAGNOSTIC 2609 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2610 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2611 bp->b_bcount); 2612 #endif 2613 2614 /* 2615 * See explanation for the necessity of a FAF in puffs_fsync. 2616 * 2617 * Also, do FAF in case we're suspending. 2618 * See puffs_vfsops.c:pageflush() 2619 */ 2620 if (BUF_ISWRITE(bp)) { 2621 mutex_enter(vp->v_interlock); 2622 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2623 dofaf = 1; 2624 if (pn->pn_stat & PNODE_FAF) 2625 dofaf = 1; 2626 mutex_exit(vp->v_interlock); 2627 } 2628 2629 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2630 2631 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2632 2633 /* allocate transport structure */ 2634 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2635 argsize = sizeof(struct puffs_vnmsg_rw); 2636 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2637 (void *)&rw_msg, cansleep); 2638 if (error) 2639 goto out; 2640 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2641 2642 /* 2x2 cases: read/write, faf/nofaf */ 2643 if (BUF_ISREAD(bp)) { 2644 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2645 PUFFS_VN_READ, VPTOPNC(vp)); 2646 puffs_msg_setdelta(park_rw, tomove); 2647 if (BIOASYNC(bp)) { 2648 puffs_msg_setcall(park_rw, 2649 puffs_parkdone_asyncbioread, bp); 2650 puffs_msg_enqueue(pmp, park_rw); 2651 dobiodone = 0; 2652 } else { 2653 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2654 NULL, error); 2655 error = checkerr(pmp, error, __func__); 2656 if (error) 2657 goto out; 2658 2659 if (rw_msg->pvnr_resid > tomove) { 2660 puffs_senderr(pmp, PUFFS_ERR_READ, 2661 E2BIG, "resid grew", VPTOPNC(vp)); 2662 ERROUT(EPROTO); 2663 } 2664 2665 moved = tomove - rw_msg->pvnr_resid; 2666 2667 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2668 bp->b_resid = bp->b_bcount - moved; 2669 } 2670 } else { 2671 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2672 PUFFS_VN_WRITE, VPTOPNC(vp)); 2673 /* 2674 * make pages read-only before we write them if we want 2675 * write caching info 2676 */ 2677 if (PUFFS_WCACHEINFO(pmp)) { 2678 struct uvm_object *uobj = &vp->v_uobj; 2679 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2680 struct vm_page *vmp; 2681 int i; 2682 2683 for (i = 0; i < npages; i++) { 2684 vmp= uvm_pageratop((vaddr_t)bp->b_data 2685 + (i << PAGE_SHIFT)); 2686 DPRINTF(("puffs_strategy: write-protecting " 2687 "vp %p page %p, offset %" PRId64"\n", 2688 vp, vmp, vmp->offset)); 2689 mutex_enter(uobj->vmobjlock); 2690 vmp->flags |= PG_RDONLY; 2691 pmap_page_protect(vmp, VM_PROT_READ); 2692 mutex_exit(uobj->vmobjlock); 2693 } 2694 } 2695 2696 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2697 if (dofaf) { 2698 puffs_msg_setfaf(park_rw); 2699 } else if (BIOASYNC(bp)) { 2700 puffs_msg_setcall(park_rw, 2701 puffs_parkdone_asyncbiowrite, bp); 2702 dobiodone = 0; 2703 } 2704 2705 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2706 2707 if (dobiodone == 0) 2708 goto out; 2709 2710 /* 2711 * XXXXXXXX: wrong, but kernel can't survive strategy 2712 * failure currently. Here, have one more X: X. 2713 */ 2714 if (error != ENOMEM) 2715 error = 0; 2716 2717 error = checkerr(pmp, error, __func__); 2718 if (error) 2719 goto out; 2720 2721 if (rw_msg->pvnr_resid > tomove) { 2722 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2723 E2BIG, "resid grew", VPTOPNC(vp)); 2724 ERROUT(EPROTO); 2725 } 2726 2727 /* 2728 * FAF moved everything. Frankly, we don't 2729 * really have a choice. 2730 */ 2731 if (dofaf && error == 0) 2732 moved = tomove; 2733 else 2734 moved = tomove - rw_msg->pvnr_resid; 2735 2736 bp->b_resid = bp->b_bcount - moved; 2737 if (bp->b_resid != 0) { 2738 ERROUT(EIO); 2739 } 2740 } 2741 2742 out: 2743 if (park_rw) 2744 puffs_msgmem_release(park_rw); 2745 2746 if (error) 2747 bp->b_error = error; 2748 2749 if (error || dobiodone) 2750 biodone(bp); 2751 2752 return error; 2753 } 2754 2755 int 2756 puffs_vnop_mmap(void *v) 2757 { 2758 struct vop_mmap_args /* { 2759 const struct vnodeop_desc *a_desc; 2760 struct vnode *a_vp; 2761 vm_prot_t a_prot; 2762 kauth_cred_t a_cred; 2763 } */ *ap = v; 2764 PUFFS_MSG_VARS(vn, mmap); 2765 struct vnode *vp = ap->a_vp; 2766 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2767 int error; 2768 2769 if (!PUFFS_USE_PAGECACHE(pmp)) 2770 return genfs_eopnotsupp(v); 2771 2772 if (EXISTSOP(pmp, MMAP)) { 2773 PUFFS_MSG_ALLOC(vn, mmap); 2774 mmap_msg->pvnr_prot = ap->a_prot; 2775 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2776 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2777 PUFFS_VN_MMAP, VPTOPNC(vp)); 2778 2779 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2780 error = checkerr(pmp, error, __func__); 2781 PUFFS_MSG_RELEASE(mmap); 2782 } else { 2783 error = genfs_mmap(v); 2784 } 2785 2786 return error; 2787 } 2788 2789 2790 /* 2791 * The rest don't get a free trip to userspace and back, they 2792 * have to stay within the kernel. 2793 */ 2794 2795 /* 2796 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2797 * well, maybe somehow, somewhere, some day .... 2798 */ 2799 int 2800 puffs_vnop_bmap(void *v) 2801 { 2802 struct vop_bmap_args /* { 2803 const struct vnodeop_desc *a_desc; 2804 struct vnode *a_vp; 2805 daddr_t a_bn; 2806 struct vnode **a_vpp; 2807 daddr_t *a_bnp; 2808 int *a_runp; 2809 } */ *ap = v; 2810 struct puffs_mount *pmp; 2811 2812 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2813 2814 if (ap->a_vpp) 2815 *ap->a_vpp = ap->a_vp; 2816 if (ap->a_bnp) 2817 *ap->a_bnp = ap->a_bn; 2818 if (ap->a_runp) 2819 *ap->a_runp 2820 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2821 2822 return 0; 2823 } 2824 2825 /* 2826 * Handle getpages faults in puffs. We let genfs_getpages() do most 2827 * of the dirty work, but we come in this route to do accounting tasks. 2828 * If the user server has specified functions for cache notifications 2829 * about reads and/or writes, we record which type of operation we got, 2830 * for which page range, and proceed to issue a FAF notification to the 2831 * server about it. 2832 */ 2833 int 2834 puffs_vnop_getpages(void *v) 2835 { 2836 struct vop_getpages_args /* { 2837 const struct vnodeop_desc *a_desc; 2838 struct vnode *a_vp; 2839 voff_t a_offset; 2840 struct vm_page **a_m; 2841 int *a_count; 2842 int a_centeridx; 2843 vm_prot_t a_access_type; 2844 int a_advice; 2845 int a_flags; 2846 } */ *ap = v; 2847 struct puffs_mount *pmp; 2848 struct puffs_node *pn; 2849 struct vnode *vp; 2850 struct vm_page **pgs; 2851 struct puffs_cacheinfo *pcinfo = NULL; 2852 struct puffs_cacherun *pcrun; 2853 void *parkmem = NULL; 2854 size_t runsizes; 2855 int i, npages, si, streakon; 2856 int error, locked, write; 2857 2858 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2859 npages = *ap->a_count; 2860 pgs = ap->a_m; 2861 vp = ap->a_vp; 2862 pn = vp->v_data; 2863 locked = (ap->a_flags & PGO_LOCKED) != 0; 2864 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2865 2866 /* ccg xnaht - gets Wuninitialized wrong */ 2867 pcrun = NULL; 2868 runsizes = 0; 2869 2870 /* 2871 * Check that we aren't trying to fault in pages which our file 2872 * server doesn't know about. This happens if we extend a file by 2873 * skipping some pages and later try to fault in pages which 2874 * are between pn_serversize and vp_size. This check optimizes 2875 * away the common case where a file is being extended. 2876 */ 2877 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2878 struct vattr va; 2879 2880 /* try again later when we can block */ 2881 if (locked) 2882 ERROUT(EBUSY); 2883 2884 mutex_exit(vp->v_interlock); 2885 vattr_null(&va); 2886 va.va_size = vp->v_size; 2887 error = dosetattr(vp, &va, FSCRED, 0); 2888 if (error) 2889 ERROUT(error); 2890 mutex_enter(vp->v_interlock); 2891 } 2892 2893 if (write && PUFFS_WCACHEINFO(pmp)) { 2894 #ifdef notnowjohn 2895 /* allocate worst-case memory */ 2896 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2897 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2898 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2899 locked ? KM_NOSLEEP : KM_SLEEP); 2900 2901 /* 2902 * can't block if we're locked and can't mess up caching 2903 * information for fs server. so come back later, please 2904 */ 2905 if (pcinfo == NULL) 2906 ERROUT(ENOMEM); 2907 2908 parkmem = puffs_park_alloc(locked == 0); 2909 if (parkmem == NULL) 2910 ERROUT(ENOMEM); 2911 2912 pcrun = pcinfo->pcache_runs; 2913 #else 2914 (void)parkmem; 2915 #endif 2916 } 2917 2918 error = genfs_getpages(v); 2919 if (error) 2920 goto out; 2921 2922 if (PUFFS_WCACHEINFO(pmp) == 0) 2923 goto out; 2924 2925 /* 2926 * Let's see whose fault it was and inform the user server of 2927 * possibly read/written pages. Map pages from read faults 2928 * strictly read-only, since otherwise we might miss info on 2929 * when the page is actually write-faulted to. 2930 */ 2931 if (!locked) 2932 mutex_enter(vp->v_uobj.vmobjlock); 2933 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2934 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2935 if (streakon && write) { 2936 streakon = 0; 2937 pcrun[si].pcache_runend 2938 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2939 si++; 2940 } 2941 continue; 2942 } 2943 if (streakon == 0 && write) { 2944 streakon = 1; 2945 pcrun[si].pcache_runstart = pgs[i]->offset; 2946 } 2947 2948 if (!write) 2949 pgs[i]->flags |= PG_RDONLY; 2950 } 2951 /* was the last page part of our streak? */ 2952 if (streakon) { 2953 pcrun[si].pcache_runend 2954 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2955 si++; 2956 } 2957 if (!locked) 2958 mutex_exit(vp->v_uobj.vmobjlock); 2959 2960 KASSERT(si <= (npages / 2) + 1); 2961 2962 #ifdef notnowjohn 2963 /* send results to userspace */ 2964 if (write) 2965 puffs_cacheop(pmp, parkmem, pcinfo, 2966 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2967 #endif 2968 2969 out: 2970 if (error) { 2971 if (pcinfo != NULL) 2972 kmem_free(pcinfo, 2973 sizeof(struct puffs_cacheinfo) + runsizes); 2974 #ifdef notnowjohn 2975 if (parkmem != NULL) 2976 puffs_park_release(parkmem, 1); 2977 #endif 2978 } 2979 2980 return error; 2981 } 2982 2983 /* 2984 * Extended attribute support. 2985 */ 2986 2987 int 2988 puffs_vnop_getextattr(void *v) 2989 { 2990 struct vop_getextattr_args /* 2991 struct vnode *a_vp; 2992 int a_attrnamespace; 2993 const char *a_name; 2994 struct uio *a_uio; 2995 size_t *a_size; 2996 kauth_cred_t a_cred; 2997 }; */ *ap = v; 2998 PUFFS_MSG_VARS(vn, getextattr); 2999 struct vnode *vp = ap->a_vp; 3000 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3001 int attrnamespace = ap->a_attrnamespace; 3002 const char *name = ap->a_name; 3003 struct uio *uio = ap->a_uio; 3004 size_t *sizep = ap->a_size; 3005 size_t tomove, resid; 3006 int error; 3007 3008 if (uio) 3009 resid = uio->uio_resid; 3010 else 3011 resid = 0; 3012 3013 tomove = PUFFS_TOMOVE(resid, pmp); 3014 if (tomove != resid) { 3015 error = E2BIG; 3016 goto out; 3017 } 3018 3019 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3020 &park_getextattr, (void *)&getextattr_msg, 1); 3021 3022 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3023 strlcpy(getextattr_msg->pvnr_attrname, name, 3024 sizeof(getextattr_msg->pvnr_attrname)); 3025 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3026 if (sizep) 3027 getextattr_msg->pvnr_datasize = 1; 3028 getextattr_msg->pvnr_resid = tomove; 3029 3030 puffs_msg_setinfo(park_getextattr, 3031 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3032 puffs_msg_setdelta(park_getextattr, tomove); 3033 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3034 3035 error = checkerr(pmp, error, __func__); 3036 if (error) 3037 goto out; 3038 3039 resid = getextattr_msg->pvnr_resid; 3040 if (resid > tomove) { 3041 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3042 "resid grew", VPTOPNC(vp)); 3043 error = EPROTO; 3044 goto out; 3045 } 3046 3047 if (sizep) 3048 *sizep = getextattr_msg->pvnr_datasize; 3049 if (uio) 3050 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3051 3052 out: 3053 PUFFS_MSG_RELEASE(getextattr); 3054 return error; 3055 } 3056 3057 int 3058 puffs_vnop_setextattr(void *v) 3059 { 3060 struct vop_setextattr_args /* { 3061 struct vnode *a_vp; 3062 int a_attrnamespace; 3063 const char *a_name; 3064 struct uio *a_uio; 3065 kauth_cred_t a_cred; 3066 }; */ *ap = v; 3067 PUFFS_MSG_VARS(vn, setextattr); 3068 struct vnode *vp = ap->a_vp; 3069 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3070 int attrnamespace = ap->a_attrnamespace; 3071 const char *name = ap->a_name; 3072 struct uio *uio = ap->a_uio; 3073 size_t tomove, resid; 3074 int error; 3075 3076 if (uio) 3077 resid = uio->uio_resid; 3078 else 3079 resid = 0; 3080 3081 tomove = PUFFS_TOMOVE(resid, pmp); 3082 if (tomove != resid) { 3083 error = E2BIG; 3084 goto out; 3085 } 3086 3087 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3088 &park_setextattr, (void *)&setextattr_msg, 1); 3089 3090 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3091 strlcpy(setextattr_msg->pvnr_attrname, name, 3092 sizeof(setextattr_msg->pvnr_attrname)); 3093 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3094 setextattr_msg->pvnr_resid = tomove; 3095 3096 if (uio) { 3097 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3098 if (error) 3099 goto out; 3100 } 3101 3102 puffs_msg_setinfo(park_setextattr, 3103 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3104 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3105 3106 error = checkerr(pmp, error, __func__); 3107 if (error) 3108 goto out; 3109 3110 if (setextattr_msg->pvnr_resid != 0) 3111 error = EIO; 3112 3113 out: 3114 PUFFS_MSG_RELEASE(setextattr); 3115 3116 return error; 3117 } 3118 3119 int 3120 puffs_vnop_listextattr(void *v) 3121 { 3122 struct vop_listextattr_args /* { 3123 struct vnode *a_vp; 3124 int a_attrnamespace; 3125 struct uio *a_uio; 3126 size_t *a_size; 3127 int a_flag, 3128 kauth_cred_t a_cred; 3129 }; */ *ap = v; 3130 PUFFS_MSG_VARS(vn, listextattr); 3131 struct vnode *vp = ap->a_vp; 3132 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3133 int attrnamespace = ap->a_attrnamespace; 3134 struct uio *uio = ap->a_uio; 3135 size_t *sizep = ap->a_size; 3136 int flag = ap->a_flag; 3137 size_t tomove, resid; 3138 int error; 3139 3140 if (uio) 3141 resid = uio->uio_resid; 3142 else 3143 resid = 0; 3144 3145 tomove = PUFFS_TOMOVE(resid, pmp); 3146 if (tomove != resid) { 3147 error = E2BIG; 3148 goto out; 3149 } 3150 3151 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3152 &park_listextattr, (void *)&listextattr_msg, 1); 3153 3154 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3155 listextattr_msg->pvnr_flag = flag; 3156 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3157 listextattr_msg->pvnr_resid = tomove; 3158 if (sizep) 3159 listextattr_msg->pvnr_datasize = 1; 3160 3161 puffs_msg_setinfo(park_listextattr, 3162 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3163 puffs_msg_setdelta(park_listextattr, tomove); 3164 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3165 3166 error = checkerr(pmp, error, __func__); 3167 if (error) 3168 goto out; 3169 3170 resid = listextattr_msg->pvnr_resid; 3171 if (resid > tomove) { 3172 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3173 "resid grew", VPTOPNC(vp)); 3174 error = EPROTO; 3175 goto out; 3176 } 3177 3178 if (sizep) 3179 *sizep = listextattr_msg->pvnr_datasize; 3180 if (uio) 3181 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3182 3183 out: 3184 PUFFS_MSG_RELEASE(listextattr); 3185 return error; 3186 } 3187 3188 int 3189 puffs_vnop_deleteextattr(void *v) 3190 { 3191 struct vop_deleteextattr_args /* { 3192 struct vnode *a_vp; 3193 int a_attrnamespace; 3194 const char *a_name; 3195 kauth_cred_t a_cred; 3196 }; */ *ap = v; 3197 PUFFS_MSG_VARS(vn, deleteextattr); 3198 struct vnode *vp = ap->a_vp; 3199 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3200 int attrnamespace = ap->a_attrnamespace; 3201 const char *name = ap->a_name; 3202 int error; 3203 3204 PUFFS_MSG_ALLOC(vn, deleteextattr); 3205 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3206 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3207 sizeof(deleteextattr_msg->pvnr_attrname)); 3208 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3209 3210 puffs_msg_setinfo(park_deleteextattr, 3211 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3212 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3213 vp->v_data, NULL, error); 3214 3215 error = checkerr(pmp, error, __func__); 3216 3217 PUFFS_MSG_RELEASE(deleteextattr); 3218 return error; 3219 } 3220 3221 /* 3222 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3223 * FAF update information for the puffs node first. 3224 */ 3225 int 3226 puffs_vnop_spec_read(void *v) 3227 { 3228 struct vop_read_args /* { 3229 const struct vnodeop_desc *a_desc; 3230 struct vnode *a_vp; 3231 struct uio *a_uio; 3232 int a_ioflag; 3233 kauth_cred_t a_cred; 3234 } */ *ap = v; 3235 3236 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3237 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3238 } 3239 3240 int 3241 puffs_vnop_spec_write(void *v) 3242 { 3243 struct vop_write_args /* { 3244 const struct vnodeop_desc *a_desc; 3245 struct vnode *a_vp; 3246 struct uio *a_uio; 3247 int a_ioflag; 3248 kauth_cred_t a_cred; 3249 } */ *ap = v; 3250 3251 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3252 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3253 } 3254 3255 int 3256 puffs_vnop_fifo_read(void *v) 3257 { 3258 struct vop_read_args /* { 3259 const struct vnodeop_desc *a_desc; 3260 struct vnode *a_vp; 3261 struct uio *a_uio; 3262 int a_ioflag; 3263 kauth_cred_t a_cred; 3264 } */ *ap = v; 3265 3266 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3267 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3268 } 3269 3270 int 3271 puffs_vnop_fifo_write(void *v) 3272 { 3273 struct vop_write_args /* { 3274 const struct vnodeop_desc *a_desc; 3275 struct vnode *a_vp; 3276 struct uio *a_uio; 3277 int a_ioflag; 3278 kauth_cred_t a_cred; 3279 } */ *ap = v; 3280 3281 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3282 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3283 } 3284
Indexes created Mon Sep 29 21:09:56 GMT 2025