puffs_vnops.c revision 1.192
1 /* $NetBSD: puffs_vnops.c,v 1.192 2014/10/06 14:26:44 he 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 1.192 2014/10/06 14:26:44 he 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_getvnode(dvp->v_mount, 672 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 673 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 674 if (error) { 675 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 676 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 677 ap->a_cnp); 678 goto out; 679 } 680 681 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 682 } 683 684 /* 685 * Update cache and TTL 686 */ 687 if (PUFFS_USE_FS_TTL(pmp)) { 688 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 689 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 690 update_va(vp, NULL, &lookup_msg->pvnr_va, 691 va_ttl, cn_ttl, SETATTR_CHSIZE); 692 } 693 694 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 695 *ap->a_vpp = vp; 696 697 if (PUFFS_USE_NAMECACHE(pmp)) 698 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 699 cnp->cn_flags); 700 701 /* XXX */ 702 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 703 cnp->cn_flags &= ~REQUIREDIR; 704 if (lookup_msg->pvnr_cn.pkcn_consume) 705 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 706 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 707 708 VPTOPP(vp)->pn_nlookup++; 709 710 if (PUFFS_USE_DOTDOTCACHE(pmp) && 711 (VPTOPP(vp)->pn_parent != dvp)) 712 update_parent(vp, dvp); 713 714 out: 715 if (cvp != NULL) { 716 mutex_exit(&cpn->pn_sizemtx); 717 718 if (error || (cvp != vp)) 719 vput(cvp); 720 } 721 if (error == 0) 722 VOP_UNLOCK(*ap->a_vpp); 723 724 if (cnp->cn_flags & ISDOTDOT) 725 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 726 727 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 728 PUFFS_MSG_RELEASE(lookup); 729 return error; 730 } 731 732 #define REFPN_AND_UNLOCKVP(a, b) \ 733 do { \ 734 mutex_enter(&b->pn_mtx); \ 735 puffs_referencenode(b); \ 736 mutex_exit(&b->pn_mtx); \ 737 VOP_UNLOCK(a); \ 738 } while (/*CONSTCOND*/0) 739 740 #define REFPN(b) \ 741 do { \ 742 mutex_enter(&b->pn_mtx); \ 743 puffs_referencenode(b); \ 744 mutex_exit(&b->pn_mtx); \ 745 } while (/*CONSTCOND*/0) 746 747 #define RELEPN_AND_VP(a, b) \ 748 do { \ 749 puffs_releasenode(b); \ 750 vrele(a); \ 751 } while (/*CONSTCOND*/0) 752 753 int 754 puffs_vnop_create(void *v) 755 { 756 struct vop_create_v3_args /* { 757 const struct vnodeop_desc *a_desc; 758 struct vnode *a_dvp; 759 struct vnode **a_vpp; 760 struct componentname *a_cnp; 761 struct vattr *a_vap; 762 } */ *ap = v; 763 PUFFS_MSG_VARS(vn, create); 764 struct vnode *dvp = ap->a_dvp; 765 struct puffs_node *dpn = VPTOPP(dvp); 766 struct componentname *cnp = ap->a_cnp; 767 struct mount *mp = dvp->v_mount; 768 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 769 int error; 770 771 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 772 dvp, ap->a_cnp->cn_nameptr)); 773 774 PUFFS_MSG_ALLOC(vn, create); 775 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 776 cnp, PUFFS_USE_FULLPNBUF(pmp)); 777 create_msg->pvnr_va = *ap->a_vap; 778 puffs_msg_setinfo(park_create, PUFFSOP_VN, 779 PUFFS_VN_CREATE, VPTOPNC(dvp)); 780 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 781 782 error = checkerr(pmp, error, __func__); 783 if (error) 784 goto out; 785 786 error = puffs_newnode(mp, dvp, ap->a_vpp, 787 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 788 if (error) { 789 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 790 create_msg->pvnr_newnode, cnp); 791 goto out; 792 } 793 794 if (PUFFS_USE_FS_TTL(pmp)) { 795 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 796 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 797 struct vattr *rvap = &create_msg->pvnr_va; 798 799 update_va(*ap->a_vpp, NULL, rvap, 800 va_ttl, cn_ttl, SETATTR_CHSIZE); 801 } 802 803 VPTOPP(*ap->a_vpp)->pn_nlookup++; 804 805 if (PUFFS_USE_DOTDOTCACHE(pmp) && 806 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 807 update_parent(*ap->a_vpp, dvp); 808 809 out: 810 DPRINTF(("puffs_create: return %d\n", error)); 811 PUFFS_MSG_RELEASE(create); 812 return error; 813 } 814 815 int 816 puffs_vnop_mknod(void *v) 817 { 818 struct vop_mknod_v3_args /* { 819 const struct vnodeop_desc *a_desc; 820 struct vnode *a_dvp; 821 struct vnode **a_vpp; 822 struct componentname *a_cnp; 823 struct vattr *a_vap; 824 } */ *ap = v; 825 PUFFS_MSG_VARS(vn, mknod); 826 struct vnode *dvp = ap->a_dvp; 827 struct puffs_node *dpn = VPTOPP(dvp); 828 struct componentname *cnp = ap->a_cnp; 829 struct mount *mp = dvp->v_mount; 830 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 831 int error; 832 833 PUFFS_MSG_ALLOC(vn, mknod); 834 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 835 cnp, PUFFS_USE_FULLPNBUF(pmp)); 836 mknod_msg->pvnr_va = *ap->a_vap; 837 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 838 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 839 840 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 841 842 error = checkerr(pmp, error, __func__); 843 if (error) 844 goto out; 845 846 error = puffs_newnode(mp, dvp, ap->a_vpp, 847 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 848 ap->a_vap->va_rdev); 849 if (error) { 850 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 851 mknod_msg->pvnr_newnode, cnp); 852 goto out; 853 } 854 855 if (PUFFS_USE_FS_TTL(pmp)) { 856 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 857 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 858 struct vattr *rvap = &mknod_msg->pvnr_va; 859 860 update_va(*ap->a_vpp, NULL, rvap, 861 va_ttl, cn_ttl, SETATTR_CHSIZE); 862 } 863 864 VPTOPP(*ap->a_vpp)->pn_nlookup++; 865 866 if (PUFFS_USE_DOTDOTCACHE(pmp) && 867 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 868 update_parent(*ap->a_vpp, dvp); 869 870 out: 871 PUFFS_MSG_RELEASE(mknod); 872 return error; 873 } 874 875 int 876 puffs_vnop_open(void *v) 877 { 878 struct vop_open_args /* { 879 const struct vnodeop_desc *a_desc; 880 struct vnode *a_vp; 881 int a_mode; 882 kauth_cred_t a_cred; 883 } */ *ap = v; 884 PUFFS_MSG_VARS(vn, open); 885 struct vnode *vp = ap->a_vp; 886 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 887 struct puffs_node *pn = VPTOPP(vp); 888 int mode = ap->a_mode; 889 int error; 890 891 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 892 893 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 894 ERROUT(EROFS); 895 896 if (!EXISTSOP(pmp, OPEN)) 897 ERROUT(0); 898 899 PUFFS_MSG_ALLOC(vn, open); 900 open_msg->pvnr_mode = mode; 901 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 902 puffs_msg_setinfo(park_open, PUFFSOP_VN, 903 PUFFS_VN_OPEN, VPTOPNC(vp)); 904 905 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 906 error = checkerr(pmp, error, __func__); 907 908 if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { 909 if (mode & FREAD) 910 pn->pn_stat |= PNODE_RDIRECT; 911 if (mode & FWRITE) 912 pn->pn_stat |= PNODE_WDIRECT; 913 } 914 out: 915 DPRINTF(("puffs_open: returning %d\n", error)); 916 PUFFS_MSG_RELEASE(open); 917 return error; 918 } 919 920 int 921 puffs_vnop_close(void *v) 922 { 923 struct vop_close_args /* { 924 const struct vnodeop_desc *a_desc; 925 struct vnode *a_vp; 926 int a_fflag; 927 kauth_cred_t a_cred; 928 } */ *ap = v; 929 PUFFS_MSG_VARS(vn, close); 930 struct vnode *vp = ap->a_vp; 931 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 932 933 PUFFS_MSG_ALLOC(vn, close); 934 puffs_msg_setfaf(park_close); 935 close_msg->pvnr_fflag = ap->a_fflag; 936 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 937 puffs_msg_setinfo(park_close, PUFFSOP_VN, 938 PUFFS_VN_CLOSE, VPTOPNC(vp)); 939 940 puffs_msg_enqueue(pmp, park_close); 941 PUFFS_MSG_RELEASE(close); 942 return 0; 943 } 944 945 int 946 puffs_vnop_access(void *v) 947 { 948 struct vop_access_args /* { 949 const struct vnodeop_desc *a_desc; 950 struct vnode *a_vp; 951 int a_mode; 952 kauth_cred_t a_cred; 953 } */ *ap = v; 954 PUFFS_MSG_VARS(vn, access); 955 struct vnode *vp = ap->a_vp; 956 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 957 int mode = ap->a_mode; 958 int error; 959 960 if (mode & VWRITE) { 961 switch (vp->v_type) { 962 case VDIR: 963 case VLNK: 964 case VREG: 965 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 966 || !EXISTSOP(pmp, WRITE)) 967 return EROFS; 968 break; 969 default: 970 break; 971 } 972 } 973 974 if (!EXISTSOP(pmp, ACCESS)) 975 return 0; 976 977 PUFFS_MSG_ALLOC(vn, access); 978 access_msg->pvnr_mode = ap->a_mode; 979 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 980 puffs_msg_setinfo(park_access, PUFFSOP_VN, 981 PUFFS_VN_ACCESS, VPTOPNC(vp)); 982 983 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 984 error = checkerr(pmp, error, __func__); 985 PUFFS_MSG_RELEASE(access); 986 987 return error; 988 } 989 990 static void 991 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 992 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 993 { 994 struct puffs_node *pn = VPTOPP(vp); 995 996 if (TTL_VALID(cn_ttl)) { 997 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 998 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 999 } 1000 1001 /* 1002 * Don't listen to the file server regarding special device 1003 * size info, the file server doesn't know anything about them. 1004 */ 1005 if (vp->v_type == VBLK || vp->v_type == VCHR) 1006 rvap->va_size = vp->v_size; 1007 1008 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1009 if (vp->v_type == VBLK) 1010 rvap->va_blocksize = BLKDEV_IOSIZE; 1011 else if (vp->v_type == VCHR) 1012 rvap->va_blocksize = MAXBSIZE; 1013 1014 if (vap != NULL) { 1015 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1016 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1017 1018 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1019 vap->va_atime = pn->pn_mc_atime; 1020 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1021 vap->va_ctime = pn->pn_mc_ctime; 1022 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1023 vap->va_mtime = pn->pn_mc_mtime; 1024 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1025 vap->va_size = pn->pn_mc_size; 1026 } 1027 1028 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1029 if (rvap->va_size != VNOVAL 1030 && vp->v_type != VBLK && vp->v_type != VCHR) { 1031 uvm_vnp_setsize(vp, rvap->va_size); 1032 pn->pn_serversize = rvap->va_size; 1033 } 1034 } 1035 1036 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1037 if (pn->pn_va_cache == NULL) 1038 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1039 1040 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1041 1042 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1043 } 1044 } 1045 1046 static void 1047 update_parent(struct vnode *vp, struct vnode *dvp) 1048 { 1049 struct puffs_node *pn = VPTOPP(vp); 1050 1051 if (pn->pn_parent != NULL) { 1052 KASSERT(pn->pn_parent != dvp); 1053 vrele(pn->pn_parent); 1054 } 1055 1056 vref(dvp); 1057 pn->pn_parent = dvp; 1058 } 1059 1060 int 1061 puffs_vnop_getattr(void *v) 1062 { 1063 struct vop_getattr_args /* { 1064 const struct vnodeop_desc *a_desc; 1065 struct vnode *a_vp; 1066 struct vattr *a_vap; 1067 kauth_cred_t a_cred; 1068 } */ *ap = v; 1069 PUFFS_MSG_VARS(vn, getattr); 1070 struct vnode *vp = ap->a_vp; 1071 struct mount *mp = vp->v_mount; 1072 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1073 struct vattr *vap, *rvap; 1074 struct puffs_node *pn = VPTOPP(vp); 1075 struct timespec *va_ttl = NULL; 1076 int error = 0; 1077 1078 /* 1079 * A lock is required so that we do not race with 1080 * setattr, write and fsync when changing vp->v_size. 1081 * This is critical, since setting a stall smaler value 1082 * triggers a file truncate in uvm_vnp_setsize(), which 1083 * most of the time means data corruption (a chunk of 1084 * data is replaced by zeroes). This can be removed if 1085 * we decide one day that VOP_GETATTR must operate on 1086 * a locked vnode. 1087 * 1088 * XXX Should be useless now that VOP_GETATTR has been 1089 * fixed to always require a shared lock at least. 1090 */ 1091 mutex_enter(&pn->pn_sizemtx); 1092 1093 REFPN(pn); 1094 vap = ap->a_vap; 1095 1096 if (PUFFS_USE_FS_TTL(pmp)) { 1097 if (!TIMED_OUT(pn->pn_va_timeout)) { 1098 update_va(vp, vap, pn->pn_va_cache, 1099 NULL, NULL, SETATTR_CHSIZE); 1100 goto out2; 1101 } 1102 } 1103 1104 PUFFS_MSG_ALLOC(vn, getattr); 1105 vattr_null(&getattr_msg->pvnr_va); 1106 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1107 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1108 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1109 1110 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1111 error = checkerr(pmp, error, __func__); 1112 if (error) 1113 goto out; 1114 1115 rvap = &getattr_msg->pvnr_va; 1116 1117 if (PUFFS_USE_FS_TTL(pmp)) 1118 va_ttl = &getattr_msg->pvnr_va_ttl; 1119 1120 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1121 1122 out: 1123 PUFFS_MSG_RELEASE(getattr); 1124 1125 out2: 1126 puffs_releasenode(pn); 1127 1128 mutex_exit(&pn->pn_sizemtx); 1129 1130 return error; 1131 } 1132 1133 static void 1134 zerofill_lastpage(struct vnode *vp, voff_t off) 1135 { 1136 char zbuf[PAGE_SIZE]; 1137 struct iovec iov; 1138 struct uio uio; 1139 vsize_t len; 1140 int error; 1141 1142 if (trunc_page(off) == off) 1143 return; 1144 1145 if (vp->v_writecount == 0) 1146 return; 1147 1148 len = round_page(off) - off; 1149 memset(zbuf, 0, len); 1150 1151 iov.iov_base = zbuf; 1152 iov.iov_len = len; 1153 UIO_SETUP_SYSSPACE(&uio); 1154 uio.uio_iov = &iov; 1155 uio.uio_iovcnt = 1; 1156 uio.uio_offset = off; 1157 uio.uio_resid = len; 1158 uio.uio_rw = UIO_WRITE; 1159 1160 error = ubc_uiomove(&vp->v_uobj, &uio, len, 1161 UVM_ADV_SEQUENTIAL, UBC_WRITE|UBC_UNMAP_FLAG(vp)); 1162 if (error) { 1163 DPRINTF(("zero-fill 0x%lx@0x%" PRIx64 " failed: error = %d\n", 1164 len, off, error)); 1165 } 1166 1167 return; 1168 } 1169 1170 static int 1171 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1172 { 1173 PUFFS_MSG_VARS(vn, setattr); 1174 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1175 struct puffs_node *pn = vp->v_data; 1176 vsize_t oldsize = vp->v_size; 1177 int error = 0; 1178 1179 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1180 1181 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1182 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1183 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1184 || vap->va_mode != (mode_t)VNOVAL)) 1185 return EROFS; 1186 1187 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1188 && vp->v_type == VREG && vap->va_size != VNOVAL) 1189 return EROFS; 1190 1191 /* 1192 * Flush metacache first. If we are called with some explicit 1193 * parameters, treat them as information overriding metacache 1194 * information. 1195 */ 1196 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1197 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1198 && vap->va_atime.tv_sec == VNOVAL) 1199 vap->va_atime = pn->pn_mc_atime; 1200 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1201 && vap->va_ctime.tv_sec == VNOVAL) 1202 vap->va_ctime = pn->pn_mc_ctime; 1203 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1204 && vap->va_mtime.tv_sec == VNOVAL) 1205 vap->va_mtime = pn->pn_mc_mtime; 1206 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1207 && vap->va_size == VNOVAL) 1208 vap->va_size = pn->pn_mc_size; 1209 1210 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1211 } 1212 1213 /* 1214 * Flush attribute cache so that another thread do 1215 * not get a stale value during the operation. 1216 */ 1217 if (PUFFS_USE_FS_TTL(pmp)) 1218 pn->pn_va_timeout = 0; 1219 1220 PUFFS_MSG_ALLOC(vn, setattr); 1221 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1222 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1223 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1224 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1225 if (flags & SETATTR_ASYNC) 1226 puffs_msg_setfaf(park_setattr); 1227 1228 puffs_msg_enqueue(pmp, park_setattr); 1229 if ((flags & SETATTR_ASYNC) == 0) 1230 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1231 1232 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1233 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1234 struct vattr *rvap = &setattr_msg->pvnr_va; 1235 1236 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1237 } 1238 1239 PUFFS_MSG_RELEASE(setattr); 1240 if ((flags & SETATTR_ASYNC) == 0) { 1241 error = checkerr(pmp, error, __func__); 1242 if (error) 1243 return error; 1244 } else { 1245 error = 0; 1246 } 1247 1248 if (vap->va_size != VNOVAL) { 1249 /* 1250 * If we truncated the file, make sure the data beyond 1251 * EOF in last page does not remain in cache, otherwise 1252 * if the file is later truncated to a larger size (creating 1253 * a hole), that area will not return zeroes as it 1254 * should. 1255 */ 1256 if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && 1257 (vap->va_size < oldsize)) 1258 zerofill_lastpage(vp, vap->va_size); 1259 1260 pn->pn_serversize = vap->va_size; 1261 if (flags & SETATTR_CHSIZE) 1262 uvm_vnp_setsize(vp, vap->va_size); 1263 } 1264 1265 return 0; 1266 } 1267 1268 int 1269 puffs_vnop_setattr(void *v) 1270 { 1271 struct vop_getattr_args /* { 1272 const struct vnodeop_desc *a_desc; 1273 struct vnode *a_vp; 1274 struct vattr *a_vap; 1275 kauth_cred_t a_cred; 1276 } */ *ap = v; 1277 struct puffs_node *pn = ap->a_vp->v_data; 1278 int error; 1279 1280 mutex_enter(&pn->pn_sizemtx); 1281 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1282 mutex_exit(&pn->pn_sizemtx); 1283 1284 return error; 1285 } 1286 1287 static __inline int 1288 doinact(struct puffs_mount *pmp, int iaflag) 1289 { 1290 1291 if (EXISTSOP(pmp, INACTIVE)) 1292 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1293 if (iaflag || ALLOPS(pmp)) 1294 return 1; 1295 else 1296 return 0; 1297 else 1298 return 1; 1299 else 1300 return 0; 1301 } 1302 1303 static void 1304 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1305 { 1306 PUFFS_MSG_VARS(vn, inactive); 1307 1308 if (doinact(pmp, iaflag)) { 1309 PUFFS_MSG_ALLOC(vn, inactive); 1310 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1311 PUFFS_VN_INACTIVE, ck); 1312 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1313 PUFFS_MSG_RELEASE(inactive); 1314 } 1315 } 1316 1317 /* XXX: callinactive can't setback */ 1318 int 1319 puffs_vnop_inactive(void *v) 1320 { 1321 struct vop_inactive_args /* { 1322 const struct vnodeop_desc *a_desc; 1323 struct vnode *a_vp; 1324 } */ *ap = v; 1325 PUFFS_MSG_VARS(vn, inactive); 1326 struct vnode *vp = ap->a_vp; 1327 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1328 struct puffs_node *pnode; 1329 bool recycle = false; 1330 1331 pnode = vp->v_data; 1332 mutex_enter(&pnode->pn_sizemtx); 1333 1334 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1335 flushvncache(vp, 0, 0, false); 1336 PUFFS_MSG_ALLOC(vn, inactive); 1337 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1338 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1339 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1340 NULL); 1341 PUFFS_MSG_RELEASE(inactive); 1342 } 1343 pnode->pn_stat &= ~PNODE_DOINACT; 1344 1345 /* 1346 * file server thinks it's gone? then don't be afraid care, 1347 * node's life was already all it would ever be 1348 */ 1349 if (pnode->pn_stat & PNODE_NOREFS) { 1350 pnode->pn_stat |= PNODE_DYING; 1351 recycle = true; 1352 } 1353 1354 /* 1355 * Handle node TTL. 1356 * If grace has already timed out, make it reclaimed. 1357 * Otherwise, we queue its expiration by sop thread, so 1358 * that it does not remain for ages in the freelist, 1359 * holding memory in userspace, while we will have 1360 * to look it up again anyway. 1361 */ 1362 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1363 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1364 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1365 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1366 1367 if (!incache && !ingrace && !reclaimqueued) { 1368 pnode->pn_stat |= PNODE_DYING; 1369 recycle = true; 1370 } 1371 1372 if (!recycle && !reclaimqueued) { 1373 struct puffs_sopreq *psopr; 1374 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1375 1376 KASSERT(curlwp != uvm.pagedaemon_lwp); 1377 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1378 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1379 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1380 psopr->psopr_at = at; 1381 1382 mutex_enter(&pmp->pmp_sopmtx); 1383 1384 /* 1385 * If thread has disapeared, just give up. The 1386 * fs is being unmounted and the node will be 1387 * be reclaimed anyway. 1388 * 1389 * Otherwise, we queue the request but do not 1390 * immediatly signal the thread, as the node 1391 * has not been expired yet. 1392 */ 1393 if (pmp->pmp_sopthrcount == 0) { 1394 kmem_free(psopr, sizeof(*psopr)); 1395 } else { 1396 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1397 psopr, psopr_entries); 1398 pnode->pn_stat |= PNODE_SOPEXP; 1399 } 1400 1401 mutex_exit(&pmp->pmp_sopmtx); 1402 } 1403 } 1404 1405 *ap->a_recycle = recycle; 1406 1407 mutex_exit(&pnode->pn_sizemtx); 1408 VOP_UNLOCK(vp); 1409 1410 return 0; 1411 } 1412 1413 static void 1414 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1415 { 1416 PUFFS_MSG_VARS(vn, reclaim); 1417 1418 if (!EXISTSOP(pmp, RECLAIM)) 1419 return; 1420 1421 PUFFS_MSG_ALLOC(vn, reclaim); 1422 reclaim_msg->pvnr_nlookup = nlookup; 1423 puffs_msg_setfaf(park_reclaim); 1424 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1425 1426 puffs_msg_enqueue(pmp, park_reclaim); 1427 PUFFS_MSG_RELEASE(reclaim); 1428 return; 1429 } 1430 1431 /* 1432 * always FAF, we don't really care if the server wants to fail to 1433 * reclaim the node or not 1434 */ 1435 int 1436 puffs_vnop_reclaim(void *v) 1437 { 1438 struct vop_reclaim_args /* { 1439 const struct vnodeop_desc *a_desc; 1440 struct vnode *a_vp; 1441 } */ *ap = v; 1442 struct vnode *vp = ap->a_vp; 1443 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1444 bool notifyserver = true; 1445 1446 /* 1447 * first things first: check if someone is trying to reclaim the 1448 * root vnode. do not allow that to travel to userspace. 1449 * Note that we don't need to take the lock similarly to 1450 * puffs_root(), since there is only one of us. 1451 */ 1452 if (vp->v_vflag & VV_ROOT) { 1453 mutex_enter(&pmp->pmp_lock); 1454 KASSERT(pmp->pmp_root != NULL); 1455 pmp->pmp_root = NULL; 1456 mutex_exit(&pmp->pmp_lock); 1457 notifyserver = false; 1458 } 1459 1460 /* 1461 * purge info from kernel before issueing FAF, since we 1462 * don't really know when we'll get around to it after 1463 * that and someone might race us into node creation 1464 */ 1465 mutex_enter(&pmp->pmp_lock); 1466 if (PUFFS_USE_NAMECACHE(pmp)) 1467 cache_purge(vp); 1468 mutex_exit(&pmp->pmp_lock); 1469 1470 if (notifyserver) { 1471 int nlookup = VPTOPP(vp)->pn_nlookup; 1472 1473 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1474 } 1475 1476 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1477 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1478 vrele(VPTOPP(vp)->pn_parent); 1479 else 1480 KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); 1481 } 1482 1483 puffs_putvnode(vp); 1484 1485 return 0; 1486 } 1487 1488 #define CSIZE sizeof(**ap->a_cookies) 1489 int 1490 puffs_vnop_readdir(void *v) 1491 { 1492 struct vop_readdir_args /* { 1493 const struct vnodeop_desc *a_desc; 1494 struct vnode *a_vp; 1495 struct uio *a_uio; 1496 kauth_cred_t a_cred; 1497 int *a_eofflag; 1498 off_t **a_cookies; 1499 int *a_ncookies; 1500 } */ *ap = v; 1501 PUFFS_MSG_VARS(vn, readdir); 1502 struct vnode *vp = ap->a_vp; 1503 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1504 size_t argsize, tomove, cookiemem, cookiesmax; 1505 struct uio *uio = ap->a_uio; 1506 size_t howmuch, resid; 1507 int error; 1508 1509 /* 1510 * ok, so we need: resid + cookiemem = maxreq 1511 * => resid + cookiesize * (resid/minsize) = maxreq 1512 * => resid + cookiesize/minsize * resid = maxreq 1513 * => (cookiesize/minsize + 1) * resid = maxreq 1514 * => resid = maxreq / (cookiesize/minsize + 1) 1515 * 1516 * Since cookiesize <= minsize and we're not very big on floats, 1517 * we approximate that to be 1. Therefore: 1518 * 1519 * resid = maxreq / 2; 1520 * 1521 * Well, at least we didn't have to use differential equations 1522 * or the Gram-Schmidt process. 1523 * 1524 * (yes, I'm very afraid of this) 1525 */ 1526 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1527 1528 if (ap->a_cookies) { 1529 KASSERT(ap->a_ncookies != NULL); 1530 if (pmp->pmp_args.pa_fhsize == 0) 1531 return EOPNOTSUPP; 1532 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1533 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1534 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1535 } else { 1536 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1537 cookiesmax = 0; 1538 cookiemem = 0; 1539 } 1540 1541 argsize = sizeof(struct puffs_vnmsg_readdir); 1542 tomove = resid + cookiemem; 1543 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1544 (void *)&readdir_msg, 1); 1545 1546 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1547 readdir_msg->pvnr_offset = uio->uio_offset; 1548 readdir_msg->pvnr_resid = resid; 1549 readdir_msg->pvnr_ncookies = cookiesmax; 1550 readdir_msg->pvnr_eofflag = 0; 1551 readdir_msg->pvnr_dentoff = cookiemem; 1552 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1553 PUFFS_VN_READDIR, VPTOPNC(vp)); 1554 puffs_msg_setdelta(park_readdir, tomove); 1555 1556 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1557 error = checkerr(pmp, error, __func__); 1558 if (error) 1559 goto out; 1560 1561 /* userspace is cheating? */ 1562 if (readdir_msg->pvnr_resid > resid) { 1563 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1564 "resid grew", VPTOPNC(vp)); 1565 ERROUT(EPROTO); 1566 } 1567 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1568 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1569 "too many cookies", VPTOPNC(vp)); 1570 ERROUT(EPROTO); 1571 } 1572 1573 /* check eof */ 1574 if (readdir_msg->pvnr_eofflag) 1575 *ap->a_eofflag = 1; 1576 1577 /* bouncy-wouncy with the directory data */ 1578 howmuch = resid - readdir_msg->pvnr_resid; 1579 1580 /* force eof if no data was returned (getcwd() needs this) */ 1581 if (howmuch == 0) { 1582 *ap->a_eofflag = 1; 1583 goto out; 1584 } 1585 1586 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1587 if (error) 1588 goto out; 1589 1590 /* provide cookies to caller if so desired */ 1591 if (ap->a_cookies) { 1592 KASSERT(curlwp != uvm.pagedaemon_lwp); 1593 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1594 M_TEMP, M_WAITOK); 1595 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1596 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1597 *ap->a_ncookies*CSIZE); 1598 } 1599 1600 /* next readdir starts here */ 1601 uio->uio_offset = readdir_msg->pvnr_offset; 1602 1603 out: 1604 puffs_msgmem_release(park_readdir); 1605 return error; 1606 } 1607 #undef CSIZE 1608 1609 /* 1610 * poll works by consuming the bitmask in pn_revents. If there are 1611 * events available, poll returns immediately. If not, it issues a 1612 * poll to userspace, selrecords itself and returns with no available 1613 * events. When the file server returns, it executes puffs_parkdone_poll(), 1614 * where available events are added to the bitmask. selnotify() is 1615 * then also executed by that function causing us to enter here again 1616 * and hopefully find the missing bits (unless someone got them first, 1617 * in which case it starts all over again). 1618 */ 1619 int 1620 puffs_vnop_poll(void *v) 1621 { 1622 struct vop_poll_args /* { 1623 const struct vnodeop_desc *a_desc; 1624 struct vnode *a_vp; 1625 int a_events; 1626 } */ *ap = v; 1627 PUFFS_MSG_VARS(vn, poll); 1628 struct vnode *vp = ap->a_vp; 1629 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1630 struct puffs_node *pn = vp->v_data; 1631 int events; 1632 1633 if (EXISTSOP(pmp, POLL)) { 1634 mutex_enter(&pn->pn_mtx); 1635 events = pn->pn_revents & ap->a_events; 1636 if (events & ap->a_events) { 1637 pn->pn_revents &= ~ap->a_events; 1638 mutex_exit(&pn->pn_mtx); 1639 1640 return events; 1641 } else { 1642 puffs_referencenode(pn); 1643 mutex_exit(&pn->pn_mtx); 1644 1645 PUFFS_MSG_ALLOC(vn, poll); 1646 poll_msg->pvnr_events = ap->a_events; 1647 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1648 PUFFS_VN_POLL, VPTOPNC(vp)); 1649 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1650 selrecord(curlwp, &pn->pn_sel); 1651 1652 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1653 vp->v_data, NULL); 1654 PUFFS_MSG_RELEASE(poll); 1655 1656 return 0; 1657 } 1658 } else { 1659 return genfs_poll(v); 1660 } 1661 } 1662 1663 static int 1664 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1665 { 1666 struct puffs_node *pn = VPTOPP(vp); 1667 struct vattr va; 1668 int pflags, error; 1669 1670 /* flush out information from our metacache, see vop_setattr */ 1671 if (pn->pn_stat & PNODE_METACACHE_MASK 1672 && (pn->pn_stat & PNODE_DYING) == 0) { 1673 vattr_null(&va); 1674 error = dosetattr(vp, &va, FSCRED, 1675 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1676 if (error) 1677 return error; 1678 } 1679 1680 /* 1681 * flush pages to avoid being overly dirty 1682 */ 1683 pflags = PGO_CLEANIT; 1684 if (wait) 1685 pflags |= PGO_SYNCIO; 1686 1687 mutex_enter(vp->v_interlock); 1688 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1689 } 1690 1691 int 1692 puffs_vnop_fsync(void *v) 1693 { 1694 struct vop_fsync_args /* { 1695 const struct vnodeop_desc *a_desc; 1696 struct vnode *a_vp; 1697 kauth_cred_t a_cred; 1698 int a_flags; 1699 off_t a_offlo; 1700 off_t a_offhi; 1701 } */ *ap = v; 1702 PUFFS_MSG_VARS(vn, fsync); 1703 struct vnode *vp; 1704 struct puffs_node *pn; 1705 struct puffs_mount *pmp; 1706 int error, dofaf; 1707 1708 vp = ap->a_vp; 1709 KASSERT(vp != NULL); 1710 pn = VPTOPP(vp); 1711 KASSERT(pn != NULL); 1712 pmp = MPTOPUFFSMP(vp->v_mount); 1713 if (ap->a_flags & FSYNC_WAIT) { 1714 mutex_enter(&pn->pn_sizemtx); 1715 } else { 1716 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1717 return EDEADLK; 1718 } 1719 1720 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1721 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1722 if (error) 1723 goto out; 1724 1725 /* 1726 * HELLO! We exit already here if the user server does not 1727 * support fsync OR if we should call fsync for a node which 1728 * has references neither in the kernel or the fs server. 1729 * Otherwise we continue to issue fsync() forward. 1730 */ 1731 error = 0; 1732 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1733 goto out; 1734 1735 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1736 /* 1737 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1738 * only FAFs for those. Otherwise there's a danger of deadlock, 1739 * since the execution context here might be the user server 1740 * doing some operation on another fs, which in turn caused a 1741 * vnode to be reclaimed from the freelist for this fs. 1742 */ 1743 if (dofaf == 0) { 1744 mutex_enter(vp->v_interlock); 1745 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1746 dofaf = 1; 1747 mutex_exit(vp->v_interlock); 1748 } 1749 1750 PUFFS_MSG_ALLOC(vn, fsync); 1751 if (dofaf) 1752 puffs_msg_setfaf(park_fsync); 1753 1754 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1755 fsync_msg->pvnr_flags = ap->a_flags; 1756 fsync_msg->pvnr_offlo = ap->a_offlo; 1757 fsync_msg->pvnr_offhi = ap->a_offhi; 1758 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1759 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1760 1761 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1762 PUFFS_MSG_RELEASE(fsync); 1763 1764 error = checkerr(pmp, error, __func__); 1765 1766 out: 1767 mutex_exit(&pn->pn_sizemtx); 1768 return error; 1769 } 1770 1771 int 1772 puffs_vnop_seek(void *v) 1773 { 1774 struct vop_seek_args /* { 1775 const struct vnodeop_desc *a_desc; 1776 struct vnode *a_vp; 1777 off_t a_oldoff; 1778 off_t a_newoff; 1779 kauth_cred_t a_cred; 1780 } */ *ap = v; 1781 PUFFS_MSG_VARS(vn, seek); 1782 struct vnode *vp = ap->a_vp; 1783 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1784 int error; 1785 1786 PUFFS_MSG_ALLOC(vn, seek); 1787 seek_msg->pvnr_oldoff = ap->a_oldoff; 1788 seek_msg->pvnr_newoff = ap->a_newoff; 1789 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1790 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1791 PUFFS_VN_SEEK, VPTOPNC(vp)); 1792 1793 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1794 PUFFS_MSG_RELEASE(seek); 1795 return checkerr(pmp, error, __func__); 1796 } 1797 1798 static int 1799 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1800 struct componentname *cnp) 1801 { 1802 PUFFS_MSG_VARS(vn, remove); 1803 int error; 1804 1805 PUFFS_MSG_ALLOC(vn, remove); 1806 remove_msg->pvnr_cookie_targ = ck; 1807 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1808 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1809 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1810 1811 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1812 PUFFS_MSG_RELEASE(remove); 1813 1814 return checkerr(pmp, error, __func__); 1815 } 1816 1817 /* 1818 * XXX: can't use callremove now because can't catch setbacks with 1819 * it due to lack of a pnode argument. 1820 */ 1821 int 1822 puffs_vnop_remove(void *v) 1823 { 1824 struct vop_remove_args /* { 1825 const struct vnodeop_desc *a_desc; 1826 struct vnode *a_dvp; 1827 struct vnode *a_vp; 1828 struct componentname *a_cnp; 1829 } */ *ap = v; 1830 PUFFS_MSG_VARS(vn, remove); 1831 struct vnode *dvp = ap->a_dvp; 1832 struct vnode *vp = ap->a_vp; 1833 struct puffs_node *dpn = VPTOPP(dvp); 1834 struct puffs_node *pn = VPTOPP(vp); 1835 struct componentname *cnp = ap->a_cnp; 1836 struct mount *mp = dvp->v_mount; 1837 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1838 int error; 1839 1840 PUFFS_MSG_ALLOC(vn, remove); 1841 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1842 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1843 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1844 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1845 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1846 1847 puffs_msg_enqueue(pmp, park_remove); 1848 REFPN_AND_UNLOCKVP(dvp, dpn); 1849 if (dvp == vp) 1850 REFPN(pn); 1851 else 1852 REFPN_AND_UNLOCKVP(vp, pn); 1853 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1854 1855 PUFFS_MSG_RELEASE(remove); 1856 1857 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1858 1859 RELEPN_AND_VP(dvp, dpn); 1860 RELEPN_AND_VP(vp, pn); 1861 1862 error = checkerr(pmp, error, __func__); 1863 return error; 1864 } 1865 1866 int 1867 puffs_vnop_mkdir(void *v) 1868 { 1869 struct vop_mkdir_v3_args /* { 1870 const struct vnodeop_desc *a_desc; 1871 struct vnode *a_dvp; 1872 struct vnode **a_vpp; 1873 struct componentname *a_cnp; 1874 struct vattr *a_vap; 1875 } */ *ap = v; 1876 PUFFS_MSG_VARS(vn, mkdir); 1877 struct vnode *dvp = ap->a_dvp; 1878 struct puffs_node *dpn = VPTOPP(dvp); 1879 struct componentname *cnp = ap->a_cnp; 1880 struct mount *mp = dvp->v_mount; 1881 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1882 int error; 1883 1884 PUFFS_MSG_ALLOC(vn, mkdir); 1885 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1886 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1887 mkdir_msg->pvnr_va = *ap->a_vap; 1888 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1889 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1890 1891 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1892 1893 error = checkerr(pmp, error, __func__); 1894 if (error) 1895 goto out; 1896 1897 error = puffs_newnode(mp, dvp, ap->a_vpp, 1898 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1899 if (error) { 1900 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1901 mkdir_msg->pvnr_newnode, cnp); 1902 goto out; 1903 } 1904 1905 if (PUFFS_USE_FS_TTL(pmp)) { 1906 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1907 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1908 struct vattr *rvap = &mkdir_msg->pvnr_va; 1909 1910 update_va(*ap->a_vpp, NULL, rvap, 1911 va_ttl, cn_ttl, SETATTR_CHSIZE); 1912 } 1913 1914 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1915 1916 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1917 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1918 update_parent(*ap->a_vpp, dvp); 1919 1920 out: 1921 PUFFS_MSG_RELEASE(mkdir); 1922 return error; 1923 } 1924 1925 static int 1926 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1927 struct componentname *cnp) 1928 { 1929 PUFFS_MSG_VARS(vn, rmdir); 1930 int error; 1931 1932 PUFFS_MSG_ALLOC(vn, rmdir); 1933 rmdir_msg->pvnr_cookie_targ = ck; 1934 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1935 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1936 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1937 1938 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1939 PUFFS_MSG_RELEASE(rmdir); 1940 1941 return checkerr(pmp, error, __func__); 1942 } 1943 1944 int 1945 puffs_vnop_rmdir(void *v) 1946 { 1947 struct vop_rmdir_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, rmdir); 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, rmdir); 1963 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1964 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1965 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1966 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1967 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1968 1969 puffs_msg_enqueue(pmp, park_rmdir); 1970 REFPN_AND_UNLOCKVP(dvp, dpn); 1971 REFPN_AND_UNLOCKVP(vp, pn); 1972 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1973 1974 PUFFS_MSG_RELEASE(rmdir); 1975 1976 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1977 1978 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1979 RELEPN_AND_VP(dvp, dpn); 1980 RELEPN_AND_VP(vp, pn); 1981 1982 return error; 1983 } 1984 1985 int 1986 puffs_vnop_link(void *v) 1987 { 1988 struct vop_link_args /* { 1989 const struct vnodeop_desc *a_desc; 1990 struct vnode *a_dvp; 1991 struct vnode *a_vp; 1992 struct componentname *a_cnp; 1993 } */ *ap = v; 1994 PUFFS_MSG_VARS(vn, link); 1995 struct vnode *dvp = ap->a_dvp; 1996 struct vnode *vp = ap->a_vp; 1997 struct puffs_node *dpn = VPTOPP(dvp); 1998 struct puffs_node *pn = VPTOPP(vp); 1999 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2000 struct componentname *cnp = ap->a_cnp; 2001 int error; 2002 2003 PUFFS_MSG_ALLOC(vn, link); 2004 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 2005 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 2006 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2007 puffs_msg_setinfo(park_link, PUFFSOP_VN, 2008 PUFFS_VN_LINK, VPTOPNC(dvp)); 2009 2010 puffs_msg_enqueue(pmp, park_link); 2011 REFPN_AND_UNLOCKVP(dvp, dpn); 2012 REFPN(pn); 2013 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 2014 2015 PUFFS_MSG_RELEASE(link); 2016 2017 error = checkerr(pmp, error, __func__); 2018 2019 /* 2020 * XXX: stay in touch with the cache. I don't like this, but 2021 * don't have a better solution either. See also puffs_rename(). 2022 */ 2023 if (error == 0) { 2024 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 2025 puffs_updatenode(VPTOPP(dvp), 2026 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2027 } 2028 2029 RELEPN_AND_VP(dvp, dpn); 2030 puffs_releasenode(pn); 2031 2032 return error; 2033 } 2034 2035 int 2036 puffs_vnop_symlink(void *v) 2037 { 2038 struct vop_symlink_v3_args /* { 2039 const struct vnodeop_desc *a_desc; 2040 struct vnode *a_dvp; 2041 struct vnode **a_vpp; 2042 struct componentname *a_cnp; 2043 struct vattr *a_vap; 2044 char *a_target; 2045 } */ *ap = v; 2046 PUFFS_MSG_VARS(vn, symlink); 2047 struct vnode *dvp = ap->a_dvp; 2048 struct puffs_node *dpn = VPTOPP(dvp); 2049 struct mount *mp = dvp->v_mount; 2050 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2051 struct componentname *cnp = ap->a_cnp; 2052 int error; 2053 2054 *ap->a_vpp = NULL; 2055 2056 PUFFS_MSG_ALLOC(vn, symlink); 2057 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2058 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2059 symlink_msg->pvnr_va = *ap->a_vap; 2060 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2061 sizeof(symlink_msg->pvnr_link)); 2062 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2063 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2064 2065 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2066 2067 error = checkerr(pmp, error, __func__); 2068 if (error) 2069 goto out; 2070 2071 error = puffs_newnode(mp, dvp, ap->a_vpp, 2072 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2073 if (error) { 2074 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2075 symlink_msg->pvnr_newnode, cnp); 2076 goto out; 2077 } 2078 2079 if (PUFFS_USE_FS_TTL(pmp)) { 2080 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2081 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2082 struct vattr *rvap = &symlink_msg->pvnr_va; 2083 2084 update_va(*ap->a_vpp, NULL, rvap, 2085 va_ttl, cn_ttl, SETATTR_CHSIZE); 2086 } 2087 2088 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2089 2090 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2091 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2092 update_parent(*ap->a_vpp, dvp); 2093 2094 out: 2095 PUFFS_MSG_RELEASE(symlink); 2096 2097 return error; 2098 } 2099 2100 int 2101 puffs_vnop_readlink(void *v) 2102 { 2103 struct vop_readlink_args /* { 2104 const struct vnodeop_desc *a_desc; 2105 struct vnode *a_vp; 2106 struct uio *a_uio; 2107 kauth_cred_t a_cred; 2108 } */ *ap = v; 2109 PUFFS_MSG_VARS(vn, readlink); 2110 struct vnode *vp = ap->a_vp; 2111 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2112 size_t linklen; 2113 int error; 2114 2115 PUFFS_MSG_ALLOC(vn, readlink); 2116 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2117 linklen = sizeof(readlink_msg->pvnr_link); 2118 readlink_msg->pvnr_linklen = linklen; 2119 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2120 PUFFS_VN_READLINK, VPTOPNC(vp)); 2121 2122 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2123 error = checkerr(pmp, error, __func__); 2124 if (error) 2125 goto out; 2126 2127 /* bad bad user file server */ 2128 if (readlink_msg->pvnr_linklen > linklen) { 2129 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2130 "linklen too big", VPTOPNC(ap->a_vp)); 2131 error = EPROTO; 2132 goto out; 2133 } 2134 2135 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2136 ap->a_uio); 2137 out: 2138 PUFFS_MSG_RELEASE(readlink); 2139 return error; 2140 } 2141 2142 int 2143 puffs_vnop_rename(void *v) 2144 { 2145 struct vop_rename_args /* { 2146 const struct vnodeop_desc *a_desc; 2147 struct vnode *a_fdvp; 2148 struct vnode *a_fvp; 2149 struct componentname *a_fcnp; 2150 struct vnode *a_tdvp; 2151 struct vnode *a_tvp; 2152 struct componentname *a_tcnp; 2153 } */ *ap = v; 2154 PUFFS_MSG_VARS(vn, rename); 2155 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2156 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2157 struct puffs_node *fpn = ap->a_fvp->v_data; 2158 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2159 int error; 2160 bool doabort = true; 2161 2162 if ((fvp->v_mount != tdvp->v_mount) || 2163 (tvp && (fvp->v_mount != tvp->v_mount))) { 2164 ERROUT(EXDEV); 2165 } 2166 2167 PUFFS_MSG_ALLOC(vn, rename); 2168 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2169 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2170 if (tvp) 2171 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2172 else 2173 rename_msg->pvnr_cookie_targ = NULL; 2174 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2175 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2176 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2177 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2178 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2179 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2180 2181 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2182 doabort = false; 2183 PUFFS_MSG_RELEASE(rename); 2184 error = checkerr(pmp, error, __func__); 2185 2186 /* 2187 * XXX: stay in touch with the cache. I don't like this, but 2188 * don't have a better solution either. See also puffs_link(). 2189 */ 2190 if (error == 0) { 2191 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2192 puffs_updatenode(VPTOPP(fdvp), 2193 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2194 if (fdvp != tdvp) 2195 puffs_updatenode(VPTOPP(tdvp), 2196 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 2197 0); 2198 2199 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2200 (VPTOPP(fvp)->pn_parent != tdvp)) 2201 update_parent(fvp, tdvp); 2202 } 2203 2204 2205 out: 2206 if (doabort) 2207 VOP_ABORTOP(tdvp, ap->a_tcnp); 2208 if (tvp != NULL) 2209 vput(tvp); 2210 if (tdvp == tvp) 2211 vrele(tdvp); 2212 else 2213 vput(tdvp); 2214 2215 if (doabort) 2216 VOP_ABORTOP(fdvp, ap->a_fcnp); 2217 vrele(fdvp); 2218 vrele(fvp); 2219 2220 return error; 2221 } 2222 2223 #define RWARGS(cont, iofl, move, offset, creds) \ 2224 (cont)->pvnr_ioflag = (iofl); \ 2225 (cont)->pvnr_resid = (move); \ 2226 (cont)->pvnr_offset = (offset); \ 2227 puffs_credcvt(&(cont)->pvnr_cred, creds) 2228 2229 int 2230 puffs_vnop_read(void *v) 2231 { 2232 struct vop_read_args /* { 2233 const struct vnodeop_desc *a_desc; 2234 struct vnode *a_vp; 2235 struct uio *a_uio; 2236 int a_ioflag; 2237 kauth_cred_t a_cred; 2238 } */ *ap = v; 2239 PUFFS_MSG_VARS(vn, read); 2240 struct vnode *vp = ap->a_vp; 2241 struct puffs_node *pn = VPTOPP(vp); 2242 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2243 struct uio *uio = ap->a_uio; 2244 size_t tomove, argsize; 2245 vsize_t bytelen; 2246 int error; 2247 2248 read_msg = NULL; 2249 error = 0; 2250 2251 /* std sanity */ 2252 if (uio->uio_resid == 0) 2253 return 0; 2254 if (uio->uio_offset < 0) 2255 return EFBIG; 2256 2257 if (vp->v_type == VREG && 2258 PUFFS_USE_PAGECACHE(pmp) && 2259 !(pn->pn_stat & PNODE_RDIRECT)) { 2260 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2261 2262 while (uio->uio_resid > 0) { 2263 if (vp->v_size <= uio->uio_offset) { 2264 break; 2265 } 2266 bytelen = MIN(uio->uio_resid, 2267 vp->v_size - uio->uio_offset); 2268 if (bytelen == 0) 2269 break; 2270 2271 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2272 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2273 if (error) 2274 break; 2275 } 2276 2277 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2278 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2279 } else { 2280 /* 2281 * in case it's not a regular file or we're operating 2282 * uncached, do read in the old-fashioned style, 2283 * i.e. explicit read operations 2284 */ 2285 2286 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2287 argsize = sizeof(struct puffs_vnmsg_read); 2288 puffs_msgmem_alloc(argsize + tomove, &park_read, 2289 (void *)&read_msg, 1); 2290 2291 error = 0; 2292 while (uio->uio_resid > 0) { 2293 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2294 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2295 RWARGS(read_msg, ap->a_ioflag, tomove, 2296 uio->uio_offset, ap->a_cred); 2297 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2298 PUFFS_VN_READ, VPTOPNC(vp)); 2299 puffs_msg_setdelta(park_read, tomove); 2300 2301 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2302 NULL, error); 2303 error = checkerr(pmp, error, __func__); 2304 if (error) 2305 break; 2306 2307 if (read_msg->pvnr_resid > tomove) { 2308 puffs_senderr(pmp, PUFFS_ERR_READ, 2309 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2310 error = EPROTO; 2311 break; 2312 } 2313 2314 error = uiomove(read_msg->pvnr_data, 2315 tomove - read_msg->pvnr_resid, uio); 2316 2317 /* 2318 * in case the file is out of juice, resid from 2319 * userspace is != 0. and the error-case is 2320 * quite obvious 2321 */ 2322 if (error || read_msg->pvnr_resid) 2323 break; 2324 } 2325 2326 puffs_msgmem_release(park_read); 2327 } 2328 2329 return error; 2330 } 2331 2332 /* 2333 * XXX: in case of a failure, this leaves uio in a bad state. 2334 * We could theoretically copy the uio and iovecs and "replay" 2335 * them the right amount after the userspace trip, but don't 2336 * bother for now. 2337 */ 2338 int 2339 puffs_vnop_write(void *v) 2340 { 2341 struct vop_write_args /* { 2342 const struct vnodeop_desc *a_desc; 2343 struct vnode *a_vp; 2344 struct uio *a_uio; 2345 int a_ioflag; 2346 kauth_cred_t a_cred; 2347 } */ *ap = v; 2348 PUFFS_MSG_VARS(vn, write); 2349 struct vnode *vp = ap->a_vp; 2350 struct puffs_node *pn = VPTOPP(vp); 2351 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2352 struct uio *uio = ap->a_uio; 2353 size_t tomove, argsize; 2354 off_t oldoff, newoff, origoff; 2355 vsize_t bytelen; 2356 int error, uflags; 2357 int ubcflags; 2358 2359 error = uflags = 0; 2360 write_msg = NULL; 2361 2362 /* std sanity */ 2363 if (uio->uio_resid == 0) 2364 return 0; 2365 if (uio->uio_offset < 0) 2366 return EFBIG; 2367 2368 mutex_enter(&pn->pn_sizemtx); 2369 2370 if (vp->v_type == VREG && 2371 PUFFS_USE_PAGECACHE(pmp) && 2372 !(pn->pn_stat & PNODE_WDIRECT)) { 2373 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2374 2375 /* 2376 * userspace *should* be allowed to control this, 2377 * but with UBC it's a bit unclear how to handle it 2378 */ 2379 if (ap->a_ioflag & IO_APPEND) 2380 uio->uio_offset = vp->v_size; 2381 2382 origoff = uio->uio_offset; 2383 while (uio->uio_resid > 0) { 2384 oldoff = uio->uio_offset; 2385 bytelen = uio->uio_resid; 2386 2387 newoff = oldoff + bytelen; 2388 if (vp->v_size < newoff) { 2389 uvm_vnp_setwritesize(vp, newoff); 2390 } 2391 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2392 UVM_ADV_RANDOM, ubcflags); 2393 2394 /* 2395 * In case of a ubc_uiomove() error, 2396 * opt to not extend the file at all and 2397 * return an error. Otherwise, if we attempt 2398 * to clear the memory we couldn't fault to, 2399 * we might generate a kernel page fault. 2400 */ 2401 if (vp->v_size < newoff) { 2402 if (error == 0) { 2403 uflags |= PUFFS_UPDATESIZE; 2404 uvm_vnp_setsize(vp, newoff); 2405 } else { 2406 uvm_vnp_setwritesize(vp, vp->v_size); 2407 } 2408 } 2409 if (error) 2410 break; 2411 2412 /* 2413 * If we're writing large files, flush to file server 2414 * every 64k. Otherwise we can very easily exhaust 2415 * kernel and user memory, as the file server cannot 2416 * really keep up with our writing speed. 2417 * 2418 * Note: this does *NOT* honor MNT_ASYNC, because 2419 * that gives userland too much say in the kernel. 2420 */ 2421 if (oldoff >> 16 != uio->uio_offset >> 16) { 2422 mutex_enter(vp->v_interlock); 2423 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2424 uio->uio_offset & ~0xffff, 2425 PGO_CLEANIT | PGO_SYNCIO); 2426 if (error) 2427 break; 2428 } 2429 } 2430 2431 /* synchronous I/O? */ 2432 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2433 mutex_enter(vp->v_interlock); 2434 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2435 round_page(uio->uio_offset), 2436 PGO_CLEANIT | PGO_SYNCIO); 2437 2438 /* write through page cache? */ 2439 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2440 mutex_enter(vp->v_interlock); 2441 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2442 round_page(uio->uio_offset), PGO_CLEANIT); 2443 } 2444 } else { 2445 /* tomove is non-increasing */ 2446 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2447 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2448 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2449 2450 while (uio->uio_resid > 0) { 2451 /* move data to buffer */ 2452 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2453 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2454 RWARGS(write_msg, ap->a_ioflag, tomove, 2455 uio->uio_offset, ap->a_cred); 2456 error = uiomove(write_msg->pvnr_data, tomove, uio); 2457 if (error) 2458 break; 2459 2460 /* move buffer to userspace */ 2461 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2462 PUFFS_VN_WRITE, VPTOPNC(vp)); 2463 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2464 NULL, error); 2465 error = checkerr(pmp, error, __func__); 2466 if (error) 2467 break; 2468 2469 if (write_msg->pvnr_resid > tomove) { 2470 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2471 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2472 error = EPROTO; 2473 break; 2474 } 2475 2476 /* adjust file size */ 2477 if (vp->v_size < uio->uio_offset) { 2478 uflags |= PUFFS_UPDATESIZE; 2479 uvm_vnp_setsize(vp, uio->uio_offset); 2480 } 2481 2482 /* didn't move everything? bad userspace. bail */ 2483 if (write_msg->pvnr_resid != 0) { 2484 error = EIO; 2485 break; 2486 } 2487 } 2488 puffs_msgmem_release(park_write); 2489 } 2490 2491 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2492 uflags |= PUFFS_UPDATEATIME; 2493 uflags |= PUFFS_UPDATECTIME; 2494 uflags |= PUFFS_UPDATEMTIME; 2495 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2496 2497 mutex_exit(&pn->pn_sizemtx); 2498 return error; 2499 } 2500 2501 int 2502 puffs_vnop_print(void *v) 2503 { 2504 struct vop_print_args /* { 2505 struct vnode *a_vp; 2506 } */ *ap = v; 2507 PUFFS_MSG_VARS(vn, print); 2508 struct vnode *vp = ap->a_vp; 2509 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2510 struct puffs_node *pn = vp->v_data; 2511 2512 /* kernel portion */ 2513 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2514 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2515 if (vp->v_type == VFIFO) 2516 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2517 printf("\n"); 2518 2519 /* userspace portion */ 2520 if (EXISTSOP(pmp, PRINT)) { 2521 PUFFS_MSG_ALLOC(vn, print); 2522 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2523 PUFFS_VN_PRINT, VPTOPNC(vp)); 2524 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2525 NULL); 2526 PUFFS_MSG_RELEASE(print); 2527 } 2528 2529 return 0; 2530 } 2531 2532 int 2533 puffs_vnop_pathconf(void *v) 2534 { 2535 struct vop_pathconf_args /* { 2536 const struct vnodeop_desc *a_desc; 2537 struct vnode *a_vp; 2538 int a_name; 2539 register_t *a_retval; 2540 } */ *ap = v; 2541 PUFFS_MSG_VARS(vn, pathconf); 2542 struct vnode *vp = ap->a_vp; 2543 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2544 int error; 2545 2546 PUFFS_MSG_ALLOC(vn, pathconf); 2547 pathconf_msg->pvnr_name = ap->a_name; 2548 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2549 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2550 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2551 error = checkerr(pmp, error, __func__); 2552 if (!error) 2553 *ap->a_retval = pathconf_msg->pvnr_retval; 2554 PUFFS_MSG_RELEASE(pathconf); 2555 2556 return error; 2557 } 2558 2559 int 2560 puffs_vnop_advlock(void *v) 2561 { 2562 struct vop_advlock_args /* { 2563 const struct vnodeop_desc *a_desc; 2564 struct vnode *a_vp; 2565 void *a_id; 2566 int a_op; 2567 struct flock *a_fl; 2568 int a_flags; 2569 } */ *ap = v; 2570 PUFFS_MSG_VARS(vn, advlock); 2571 struct vnode *vp = ap->a_vp; 2572 struct puffs_node *pn = VPTOPP(vp); 2573 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2574 int error; 2575 2576 if (!EXISTSOP(pmp, ADVLOCK)) 2577 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2578 2579 PUFFS_MSG_ALLOC(vn, advlock); 2580 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2581 sizeof(advlock_msg->pvnr_fl)); 2582 advlock_msg->pvnr_id = ap->a_id; 2583 advlock_msg->pvnr_op = ap->a_op; 2584 advlock_msg->pvnr_flags = ap->a_flags; 2585 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2586 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2587 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2588 error = checkerr(pmp, error, __func__); 2589 PUFFS_MSG_RELEASE(advlock); 2590 2591 return error; 2592 } 2593 2594 int 2595 puffs_vnop_abortop(void *v) 2596 { 2597 struct vop_abortop_args /* { 2598 struct vnode *a_dvp; 2599 struct componentname *a_cnp; 2600 }; */ *ap = v; 2601 PUFFS_MSG_VARS(vn, abortop); 2602 struct vnode *dvp = ap->a_dvp; 2603 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2604 struct componentname *cnp = ap->a_cnp; 2605 2606 if (EXISTSOP(pmp, ABORTOP)) { 2607 PUFFS_MSG_ALLOC(vn, abortop); 2608 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2609 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2610 puffs_msg_setfaf(park_abortop); 2611 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2612 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2613 2614 puffs_msg_enqueue(pmp, park_abortop); 2615 PUFFS_MSG_RELEASE(abortop); 2616 } 2617 2618 return genfs_abortop(v); 2619 } 2620 2621 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2622 2623 /* 2624 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2625 */ 2626 int 2627 puffs_vnop_strategy(void *v) 2628 { 2629 struct vop_strategy_args /* { 2630 const struct vnodeop_desc *a_desc; 2631 struct vnode *a_vp; 2632 struct buf *a_bp; 2633 } */ *ap = v; 2634 PUFFS_MSG_VARS(vn, rw); 2635 struct vnode *vp = ap->a_vp; 2636 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2637 struct puffs_node *pn; 2638 struct buf *bp; 2639 size_t argsize; 2640 size_t tomove, moved; 2641 int error, dofaf, cansleep, dobiodone; 2642 2643 pmp = MPTOPUFFSMP(vp->v_mount); 2644 bp = ap->a_bp; 2645 error = 0; 2646 dofaf = 0; 2647 cansleep = 0; 2648 pn = VPTOPP(vp); 2649 park_rw = NULL; /* explicit */ 2650 dobiodone = 1; 2651 2652 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2653 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2654 ERROUT(EOPNOTSUPP); 2655 2656 /* 2657 * Short-circuit optimization: don't flush buffer in between 2658 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2659 */ 2660 if (pn->pn_stat & PNODE_DYING) { 2661 KASSERT(BUF_ISWRITE(bp)); 2662 bp->b_resid = 0; 2663 goto out; 2664 } 2665 2666 #ifdef DIAGNOSTIC 2667 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2668 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2669 bp->b_bcount); 2670 #endif 2671 2672 /* 2673 * See explanation for the necessity of a FAF in puffs_fsync. 2674 * 2675 * Also, do FAF in case we're suspending. 2676 * See puffs_vfsops.c:pageflush() 2677 */ 2678 if (BUF_ISWRITE(bp)) { 2679 mutex_enter(vp->v_interlock); 2680 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2681 dofaf = 1; 2682 if (pn->pn_stat & PNODE_FAF) 2683 dofaf = 1; 2684 mutex_exit(vp->v_interlock); 2685 } 2686 2687 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2688 2689 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2690 2691 /* allocate transport structure */ 2692 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2693 argsize = sizeof(struct puffs_vnmsg_rw); 2694 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2695 (void *)&rw_msg, cansleep); 2696 if (error) 2697 goto out; 2698 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2699 2700 /* 2x2 cases: read/write, faf/nofaf */ 2701 if (BUF_ISREAD(bp)) { 2702 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2703 PUFFS_VN_READ, VPTOPNC(vp)); 2704 puffs_msg_setdelta(park_rw, tomove); 2705 if (BIOASYNC(bp)) { 2706 puffs_msg_setcall(park_rw, 2707 puffs_parkdone_asyncbioread, bp); 2708 puffs_msg_enqueue(pmp, park_rw); 2709 dobiodone = 0; 2710 } else { 2711 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2712 NULL, error); 2713 error = checkerr(pmp, error, __func__); 2714 if (error) 2715 goto out; 2716 2717 if (rw_msg->pvnr_resid > tomove) { 2718 puffs_senderr(pmp, PUFFS_ERR_READ, 2719 E2BIG, "resid grew", VPTOPNC(vp)); 2720 ERROUT(EPROTO); 2721 } 2722 2723 moved = tomove - rw_msg->pvnr_resid; 2724 2725 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2726 bp->b_resid = bp->b_bcount - moved; 2727 } 2728 } else { 2729 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2730 PUFFS_VN_WRITE, VPTOPNC(vp)); 2731 /* 2732 * make pages read-only before we write them if we want 2733 * write caching info 2734 */ 2735 if (PUFFS_WCACHEINFO(pmp)) { 2736 struct uvm_object *uobj = &vp->v_uobj; 2737 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2738 struct vm_page *vmp; 2739 int i; 2740 2741 for (i = 0; i < npages; i++) { 2742 vmp= uvm_pageratop((vaddr_t)bp->b_data 2743 + (i << PAGE_SHIFT)); 2744 DPRINTF(("puffs_strategy: write-protecting " 2745 "vp %p page %p, offset %" PRId64"\n", 2746 vp, vmp, vmp->offset)); 2747 mutex_enter(uobj->vmobjlock); 2748 vmp->flags |= PG_RDONLY; 2749 pmap_page_protect(vmp, VM_PROT_READ); 2750 mutex_exit(uobj->vmobjlock); 2751 } 2752 } 2753 2754 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2755 if (dofaf) { 2756 puffs_msg_setfaf(park_rw); 2757 } else if (BIOASYNC(bp)) { 2758 puffs_msg_setcall(park_rw, 2759 puffs_parkdone_asyncbiowrite, bp); 2760 dobiodone = 0; 2761 } 2762 2763 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2764 2765 if (dobiodone == 0) 2766 goto out; 2767 2768 /* 2769 * XXXXXXXX: wrong, but kernel can't survive strategy 2770 * failure currently. Here, have one more X: X. 2771 */ 2772 if (error != ENOMEM) 2773 error = 0; 2774 2775 error = checkerr(pmp, error, __func__); 2776 if (error) 2777 goto out; 2778 2779 if (rw_msg->pvnr_resid > tomove) { 2780 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2781 E2BIG, "resid grew", VPTOPNC(vp)); 2782 ERROUT(EPROTO); 2783 } 2784 2785 /* 2786 * FAF moved everything. Frankly, we don't 2787 * really have a choice. 2788 */ 2789 if (dofaf && error == 0) 2790 moved = tomove; 2791 else 2792 moved = tomove - rw_msg->pvnr_resid; 2793 2794 bp->b_resid = bp->b_bcount - moved; 2795 if (bp->b_resid != 0) { 2796 ERROUT(EIO); 2797 } 2798 } 2799 2800 out: 2801 if (park_rw) 2802 puffs_msgmem_release(park_rw); 2803 2804 if (error) 2805 bp->b_error = error; 2806 2807 if (error || dobiodone) 2808 biodone(bp); 2809 2810 return error; 2811 } 2812 2813 int 2814 puffs_vnop_mmap(void *v) 2815 { 2816 struct vop_mmap_args /* { 2817 const struct vnodeop_desc *a_desc; 2818 struct vnode *a_vp; 2819 vm_prot_t a_prot; 2820 kauth_cred_t a_cred; 2821 } */ *ap = v; 2822 PUFFS_MSG_VARS(vn, mmap); 2823 struct vnode *vp = ap->a_vp; 2824 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2825 int error; 2826 2827 if (!PUFFS_USE_PAGECACHE(pmp)) 2828 return genfs_eopnotsupp(v); 2829 2830 if (EXISTSOP(pmp, MMAP)) { 2831 PUFFS_MSG_ALLOC(vn, mmap); 2832 mmap_msg->pvnr_prot = ap->a_prot; 2833 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2834 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2835 PUFFS_VN_MMAP, VPTOPNC(vp)); 2836 2837 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2838 error = checkerr(pmp, error, __func__); 2839 PUFFS_MSG_RELEASE(mmap); 2840 } else { 2841 error = genfs_mmap(v); 2842 } 2843 2844 return error; 2845 } 2846 2847 2848 /* 2849 * The rest don't get a free trip to userspace and back, they 2850 * have to stay within the kernel. 2851 */ 2852 2853 /* 2854 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2855 * well, maybe somehow, somewhere, some day .... 2856 */ 2857 int 2858 puffs_vnop_bmap(void *v) 2859 { 2860 struct vop_bmap_args /* { 2861 const struct vnodeop_desc *a_desc; 2862 struct vnode *a_vp; 2863 daddr_t a_bn; 2864 struct vnode **a_vpp; 2865 daddr_t *a_bnp; 2866 int *a_runp; 2867 } */ *ap = v; 2868 struct puffs_mount *pmp; 2869 2870 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2871 2872 if (ap->a_vpp) 2873 *ap->a_vpp = ap->a_vp; 2874 if (ap->a_bnp) 2875 *ap->a_bnp = ap->a_bn; 2876 if (ap->a_runp) 2877 *ap->a_runp 2878 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2879 2880 return 0; 2881 } 2882 2883 /* 2884 * Handle getpages faults in puffs. We let genfs_getpages() do most 2885 * of the dirty work, but we come in this route to do accounting tasks. 2886 * If the user server has specified functions for cache notifications 2887 * about reads and/or writes, we record which type of operation we got, 2888 * for which page range, and proceed to issue a FAF notification to the 2889 * server about it. 2890 */ 2891 int 2892 puffs_vnop_getpages(void *v) 2893 { 2894 struct vop_getpages_args /* { 2895 const struct vnodeop_desc *a_desc; 2896 struct vnode *a_vp; 2897 voff_t a_offset; 2898 struct vm_page **a_m; 2899 int *a_count; 2900 int a_centeridx; 2901 vm_prot_t a_access_type; 2902 int a_advice; 2903 int a_flags; 2904 } */ *ap = v; 2905 struct puffs_mount *pmp; 2906 struct puffs_node *pn; 2907 struct vnode *vp; 2908 struct vm_page **pgs; 2909 struct puffs_cacheinfo *pcinfo = NULL; 2910 struct puffs_cacherun *pcrun; 2911 void *parkmem = NULL; 2912 size_t runsizes; 2913 int i, npages, si, streakon; 2914 int error, locked, write; 2915 2916 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2917 npages = *ap->a_count; 2918 pgs = ap->a_m; 2919 vp = ap->a_vp; 2920 pn = vp->v_data; 2921 locked = (ap->a_flags & PGO_LOCKED) != 0; 2922 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2923 2924 /* ccg xnaht - gets Wuninitialized wrong */ 2925 pcrun = NULL; 2926 runsizes = 0; 2927 2928 /* 2929 * Check that we aren't trying to fault in pages which our file 2930 * server doesn't know about. This happens if we extend a file by 2931 * skipping some pages and later try to fault in pages which 2932 * are between pn_serversize and vp_size. This check optimizes 2933 * away the common case where a file is being extended. 2934 */ 2935 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2936 struct vattr va; 2937 2938 /* try again later when we can block */ 2939 if (locked) 2940 ERROUT(EBUSY); 2941 2942 mutex_exit(vp->v_interlock); 2943 vattr_null(&va); 2944 va.va_size = vp->v_size; 2945 error = dosetattr(vp, &va, FSCRED, 0); 2946 if (error) 2947 ERROUT(error); 2948 mutex_enter(vp->v_interlock); 2949 } 2950 2951 if (write && PUFFS_WCACHEINFO(pmp)) { 2952 #ifdef notnowjohn 2953 /* allocate worst-case memory */ 2954 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2955 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2956 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2957 locked ? KM_NOSLEEP : KM_SLEEP); 2958 2959 /* 2960 * can't block if we're locked and can't mess up caching 2961 * information for fs server. so come back later, please 2962 */ 2963 if (pcinfo == NULL) 2964 ERROUT(ENOMEM); 2965 2966 parkmem = puffs_park_alloc(locked == 0); 2967 if (parkmem == NULL) 2968 ERROUT(ENOMEM); 2969 2970 pcrun = pcinfo->pcache_runs; 2971 #else 2972 (void)parkmem; 2973 #endif 2974 } 2975 2976 error = genfs_getpages(v); 2977 if (error) 2978 goto out; 2979 2980 if (PUFFS_WCACHEINFO(pmp) == 0) 2981 goto out; 2982 2983 /* 2984 * Let's see whose fault it was and inform the user server of 2985 * possibly read/written pages. Map pages from read faults 2986 * strictly read-only, since otherwise we might miss info on 2987 * when the page is actually write-faulted to. 2988 */ 2989 if (!locked) 2990 mutex_enter(vp->v_uobj.vmobjlock); 2991 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2992 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2993 if (streakon && write) { 2994 streakon = 0; 2995 pcrun[si].pcache_runend 2996 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2997 si++; 2998 } 2999 continue; 3000 } 3001 if (streakon == 0 && write) { 3002 streakon = 1; 3003 pcrun[si].pcache_runstart = pgs[i]->offset; 3004 } 3005 3006 if (!write) 3007 pgs[i]->flags |= PG_RDONLY; 3008 } 3009 /* was the last page part of our streak? */ 3010 if (streakon) { 3011 pcrun[si].pcache_runend 3012 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 3013 si++; 3014 } 3015 if (!locked) 3016 mutex_exit(vp->v_uobj.vmobjlock); 3017 3018 KASSERT(si <= (npages / 2) + 1); 3019 3020 #ifdef notnowjohn 3021 /* send results to userspace */ 3022 if (write) 3023 puffs_cacheop(pmp, parkmem, pcinfo, 3024 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 3025 #endif 3026 3027 out: 3028 if (error) { 3029 if (pcinfo != NULL) 3030 kmem_free(pcinfo, 3031 sizeof(struct puffs_cacheinfo) + runsizes); 3032 #ifdef notnowjohn 3033 if (parkmem != NULL) 3034 puffs_park_release(parkmem, 1); 3035 #endif 3036 } 3037 3038 return error; 3039 } 3040 3041 /* 3042 * Extended attribute support. 3043 */ 3044 3045 int 3046 puffs_vnop_getextattr(void *v) 3047 { 3048 struct vop_getextattr_args /* 3049 struct vnode *a_vp; 3050 int a_attrnamespace; 3051 const char *a_name; 3052 struct uio *a_uio; 3053 size_t *a_size; 3054 kauth_cred_t a_cred; 3055 }; */ *ap = v; 3056 PUFFS_MSG_VARS(vn, getextattr); 3057 struct vnode *vp = ap->a_vp; 3058 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3059 int attrnamespace = ap->a_attrnamespace; 3060 const char *name = ap->a_name; 3061 struct uio *uio = ap->a_uio; 3062 size_t *sizep = ap->a_size; 3063 size_t tomove, resid; 3064 int error; 3065 3066 if (uio) 3067 resid = uio->uio_resid; 3068 else 3069 resid = 0; 3070 3071 tomove = PUFFS_TOMOVE(resid, pmp); 3072 if (tomove != resid) { 3073 error = E2BIG; 3074 goto out; 3075 } 3076 3077 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3078 &park_getextattr, (void *)&getextattr_msg, 1); 3079 3080 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3081 strlcpy(getextattr_msg->pvnr_attrname, name, 3082 sizeof(getextattr_msg->pvnr_attrname)); 3083 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3084 if (sizep) 3085 getextattr_msg->pvnr_datasize = 1; 3086 getextattr_msg->pvnr_resid = tomove; 3087 3088 puffs_msg_setinfo(park_getextattr, 3089 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3090 puffs_msg_setdelta(park_getextattr, tomove); 3091 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3092 3093 error = checkerr(pmp, error, __func__); 3094 if (error) 3095 goto out; 3096 3097 resid = getextattr_msg->pvnr_resid; 3098 if (resid > tomove) { 3099 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3100 "resid grew", VPTOPNC(vp)); 3101 error = EPROTO; 3102 goto out; 3103 } 3104 3105 if (sizep) 3106 *sizep = getextattr_msg->pvnr_datasize; 3107 if (uio) 3108 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3109 3110 out: 3111 PUFFS_MSG_RELEASE(getextattr); 3112 return error; 3113 } 3114 3115 int 3116 puffs_vnop_setextattr(void *v) 3117 { 3118 struct vop_setextattr_args /* { 3119 struct vnode *a_vp; 3120 int a_attrnamespace; 3121 const char *a_name; 3122 struct uio *a_uio; 3123 kauth_cred_t a_cred; 3124 }; */ *ap = v; 3125 PUFFS_MSG_VARS(vn, setextattr); 3126 struct vnode *vp = ap->a_vp; 3127 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3128 int attrnamespace = ap->a_attrnamespace; 3129 const char *name = ap->a_name; 3130 struct uio *uio = ap->a_uio; 3131 size_t tomove, resid; 3132 int error; 3133 3134 if (uio) 3135 resid = uio->uio_resid; 3136 else 3137 resid = 0; 3138 3139 tomove = PUFFS_TOMOVE(resid, pmp); 3140 if (tomove != resid) { 3141 error = E2BIG; 3142 goto out; 3143 } 3144 3145 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3146 &park_setextattr, (void *)&setextattr_msg, 1); 3147 3148 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3149 strlcpy(setextattr_msg->pvnr_attrname, name, 3150 sizeof(setextattr_msg->pvnr_attrname)); 3151 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3152 setextattr_msg->pvnr_resid = tomove; 3153 3154 if (uio) { 3155 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3156 if (error) 3157 goto out; 3158 } 3159 3160 puffs_msg_setinfo(park_setextattr, 3161 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3162 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3163 3164 error = checkerr(pmp, error, __func__); 3165 if (error) 3166 goto out; 3167 3168 if (setextattr_msg->pvnr_resid != 0) 3169 error = EIO; 3170 3171 out: 3172 PUFFS_MSG_RELEASE(setextattr); 3173 3174 return error; 3175 } 3176 3177 int 3178 puffs_vnop_listextattr(void *v) 3179 { 3180 struct vop_listextattr_args /* { 3181 struct vnode *a_vp; 3182 int a_attrnamespace; 3183 struct uio *a_uio; 3184 size_t *a_size; 3185 int a_flag, 3186 kauth_cred_t a_cred; 3187 }; */ *ap = v; 3188 PUFFS_MSG_VARS(vn, listextattr); 3189 struct vnode *vp = ap->a_vp; 3190 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3191 int attrnamespace = ap->a_attrnamespace; 3192 struct uio *uio = ap->a_uio; 3193 size_t *sizep = ap->a_size; 3194 int flag = ap->a_flag; 3195 size_t tomove, resid; 3196 int error; 3197 3198 if (uio) 3199 resid = uio->uio_resid; 3200 else 3201 resid = 0; 3202 3203 tomove = PUFFS_TOMOVE(resid, pmp); 3204 if (tomove != resid) { 3205 error = E2BIG; 3206 goto out; 3207 } 3208 3209 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3210 &park_listextattr, (void *)&listextattr_msg, 1); 3211 3212 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3213 listextattr_msg->pvnr_flag = flag; 3214 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3215 listextattr_msg->pvnr_resid = tomove; 3216 if (sizep) 3217 listextattr_msg->pvnr_datasize = 1; 3218 3219 puffs_msg_setinfo(park_listextattr, 3220 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3221 puffs_msg_setdelta(park_listextattr, tomove); 3222 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3223 3224 error = checkerr(pmp, error, __func__); 3225 if (error) 3226 goto out; 3227 3228 resid = listextattr_msg->pvnr_resid; 3229 if (resid > tomove) { 3230 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3231 "resid grew", VPTOPNC(vp)); 3232 error = EPROTO; 3233 goto out; 3234 } 3235 3236 if (sizep) 3237 *sizep = listextattr_msg->pvnr_datasize; 3238 if (uio) 3239 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3240 3241 out: 3242 PUFFS_MSG_RELEASE(listextattr); 3243 return error; 3244 } 3245 3246 int 3247 puffs_vnop_deleteextattr(void *v) 3248 { 3249 struct vop_deleteextattr_args /* { 3250 struct vnode *a_vp; 3251 int a_attrnamespace; 3252 const char *a_name; 3253 kauth_cred_t a_cred; 3254 }; */ *ap = v; 3255 PUFFS_MSG_VARS(vn, deleteextattr); 3256 struct vnode *vp = ap->a_vp; 3257 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3258 int attrnamespace = ap->a_attrnamespace; 3259 const char *name = ap->a_name; 3260 int error; 3261 3262 PUFFS_MSG_ALLOC(vn, deleteextattr); 3263 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3264 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3265 sizeof(deleteextattr_msg->pvnr_attrname)); 3266 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3267 3268 puffs_msg_setinfo(park_deleteextattr, 3269 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3270 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3271 vp->v_data, NULL, error); 3272 3273 error = checkerr(pmp, error, __func__); 3274 3275 PUFFS_MSG_RELEASE(deleteextattr); 3276 return error; 3277 } 3278 3279 /* 3280 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3281 * FAF update information for the puffs node first. 3282 */ 3283 int 3284 puffs_vnop_spec_read(void *v) 3285 { 3286 struct vop_read_args /* { 3287 const struct vnodeop_desc *a_desc; 3288 struct vnode *a_vp; 3289 struct uio *a_uio; 3290 int a_ioflag; 3291 kauth_cred_t a_cred; 3292 } */ *ap = v; 3293 3294 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3295 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3296 } 3297 3298 int 3299 puffs_vnop_spec_write(void *v) 3300 { 3301 struct vop_write_args /* { 3302 const struct vnodeop_desc *a_desc; 3303 struct vnode *a_vp; 3304 struct uio *a_uio; 3305 int a_ioflag; 3306 kauth_cred_t a_cred; 3307 } */ *ap = v; 3308 3309 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3310 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3311 } 3312 3313 int 3314 puffs_vnop_fifo_read(void *v) 3315 { 3316 struct vop_read_args /* { 3317 const struct vnodeop_desc *a_desc; 3318 struct vnode *a_vp; 3319 struct uio *a_uio; 3320 int a_ioflag; 3321 kauth_cred_t a_cred; 3322 } */ *ap = v; 3323 3324 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3325 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3326 } 3327 3328 int 3329 puffs_vnop_fifo_write(void *v) 3330 { 3331 struct vop_write_args /* { 3332 const struct vnodeop_desc *a_desc; 3333 struct vnode *a_vp; 3334 struct uio *a_uio; 3335 int a_ioflag; 3336 kauth_cred_t a_cred; 3337 } */ *ap = v; 3338 3339 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3340 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3341 } 3342
Indexes created Tue Sep 30 20:09:53 GMT 2025