puffs_vnops.c revision 1.218
1 /* $NetBSD: puffs_vnops.c,v 1.218 2021/06/29 22:34:07 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.218 2021/06/29 22:34:07 dholland Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, getticks() */ 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_fallocate(void *); 77 int puffs_vnop_fdiscard(void *); 78 int puffs_vnop_fcntl(void *); 79 int puffs_vnop_ioctl(void *); 80 int puffs_vnop_inactive(void *); 81 int puffs_vnop_print(void *); 82 int puffs_vnop_pathconf(void *); 83 int puffs_vnop_advlock(void *); 84 int puffs_vnop_strategy(void *); 85 int puffs_vnop_bmap(void *); 86 int puffs_vnop_mmap(void *); 87 int puffs_vnop_getpages(void *); 88 int puffs_vnop_abortop(void *); 89 int puffs_vnop_getextattr(void *); 90 int puffs_vnop_setextattr(void *); 91 int puffs_vnop_listextattr(void *); 92 int puffs_vnop_deleteextattr(void *); 93 94 int puffs_vnop_spec_read(void *); 95 int puffs_vnop_spec_write(void *); 96 int puffs_vnop_fifo_read(void *); 97 int puffs_vnop_fifo_write(void *); 98 99 int puffs_vnop_checkop(void *); 100 101 #define puffs_vnop_lock genfs_lock 102 #define puffs_vnop_unlock genfs_unlock 103 #define puffs_vnop_islocked genfs_islocked 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 109 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 110 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 111 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 112 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 113 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 114 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 115 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 116 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 117 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 118 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 119 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 120 { &vop_fallocate_desc, puffs_vnop_fallocate }, /* fallocate */ 121 { &vop_fdiscard_desc, puffs_vnop_fdiscard }, /* fdiscard */ 122 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 123 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 124 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 125 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 126 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 127 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 128 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 129 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 130 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 131 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 132 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 133 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 134 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 135 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 136 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 137 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 138 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 139 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 140 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 141 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 142 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 143 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 144 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 145 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 146 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 147 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 148 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 149 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 150 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 151 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 152 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 153 #if 0 154 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 155 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 156 #endif 157 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 158 { NULL, NULL } 159 }; 160 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 161 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 162 163 164 int (**puffs_specop_p)(void *); 165 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 166 { &vop_default_desc, vn_default_error }, 167 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 168 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 169 { &vop_create_desc, spec_create }, /* genfs_badop */ 170 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 171 { &vop_open_desc, spec_open }, /* spec_open */ 172 { &vop_close_desc, spec_close }, /* spec_close */ 173 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 174 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 175 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 176 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 177 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 178 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 179 { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ 180 { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ 181 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 182 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 183 { &vop_poll_desc, spec_poll }, /* spec_poll */ 184 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 185 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 186 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 187 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 188 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 189 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 190 { &vop_link_desc, spec_link }, /* genfs_badop */ 191 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 192 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 193 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 194 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 195 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 196 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 197 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 198 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 199 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 200 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 201 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 202 { &vop_bmap_desc, spec_bmap }, /* dummy */ 203 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 204 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 205 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 206 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 207 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 208 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 209 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 210 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 211 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 212 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 213 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 214 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 215 #if 0 216 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 217 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 218 #endif 219 { NULL, NULL } 220 }; 221 const struct vnodeopv_desc puffs_specop_opv_desc = 222 { &puffs_specop_p, puffs_specop_entries }; 223 224 225 int (**puffs_fifoop_p)(void *); 226 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 227 { &vop_default_desc, vn_default_error }, 228 { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ 229 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 230 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 231 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 232 { &vop_open_desc, vn_fifo_bypass }, /* open */ 233 { &vop_close_desc, vn_fifo_bypass }, /* close */ 234 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 235 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 236 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 237 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 238 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 239 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 240 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ 241 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ 242 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 243 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 244 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 245 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 246 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 247 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 248 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 249 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 252 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 253 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 254 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 255 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 256 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 257 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 258 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 259 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 260 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 261 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 262 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 263 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 264 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 265 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 266 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 267 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 268 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 269 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 270 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 271 #if 0 272 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 273 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 274 #endif 275 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 276 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 277 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 278 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 279 { NULL, NULL } 280 }; 281 const struct vnodeopv_desc puffs_fifoop_opv_desc = 282 { &puffs_fifoop_p, puffs_fifoop_entries }; 283 284 285 /* "real" vnode operations */ 286 int (**puffs_msgop_p)(void *); 287 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 288 { &vop_default_desc, vn_default_error }, 289 { &vop_parsepath_desc, genfs_parsepath }, 290 { &vop_create_desc, puffs_vnop_create }, /* create */ 291 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 292 { &vop_open_desc, puffs_vnop_open }, /* open */ 293 { &vop_close_desc, puffs_vnop_close }, /* close */ 294 { &vop_access_desc, puffs_vnop_access }, /* access */ 295 { &vop_accessx_desc, genfs_accessx }, /* accessx */ 296 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 297 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 298 { &vop_read_desc, puffs_vnop_read }, /* read */ 299 { &vop_write_desc, puffs_vnop_write }, /* write */ 300 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 301 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 302 { &vop_link_desc, puffs_vnop_link }, /* link */ 303 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 304 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 305 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 306 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 307 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 308 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 309 { &vop_print_desc, puffs_vnop_print }, /* print */ 310 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 311 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 312 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 313 { NULL, NULL } 314 }; 315 const struct vnodeopv_desc puffs_msgop_opv_desc = 316 { &puffs_msgop_p, puffs_msgop_entries }; 317 318 /* 319 * for dosetattr / update_va 320 */ 321 #define SETATTR_CHSIZE 0x01 322 #define SETATTR_ASYNC 0x02 323 324 #define ERROUT(err) \ 325 do { \ 326 error = err; \ 327 goto out; \ 328 } while (/*CONSTCOND*/0) 329 330 /* 331 * This is a generic vnode operation handler. It checks if the necessary 332 * operations for the called vnode operation are implemented by userspace 333 * and either returns a dummy return value or proceeds to call the real 334 * vnode operation from puffs_msgop_v. 335 * 336 * XXX: this should described elsewhere and autogenerated, the complexity 337 * of the vnode operations vectors and their interrelationships is also 338 * getting a bit out of hand. Another problem is that we need this same 339 * information in the fs server code, so keeping the two in sync manually 340 * is not a viable (long term) plan. 341 */ 342 343 /* not supported, handle locking protocol */ 344 #define CHECKOP_NOTSUPP(op) \ 345 case VOP_##op##_DESCOFFSET: \ 346 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 347 return genfs_eopnotsupp(v); \ 348 break 349 350 /* always succeed, no locking */ 351 #define CHECKOP_SUCCESS(op) \ 352 case VOP_##op##_DESCOFFSET: \ 353 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 354 return 0; \ 355 break 356 357 int 358 puffs_vnop_checkop(void *v) 359 { 360 struct vop_generic_args /* { 361 struct vnodeop_desc *a_desc; 362 spooky mystery contents; 363 } */ *ap = v; 364 struct vnodeop_desc *desc = ap->a_desc; 365 struct puffs_mount *pmp; 366 struct vnode *vp; 367 int offset, rv; 368 369 offset = ap->a_desc->vdesc_vp_offsets[0]; 370 #ifdef DIAGNOSTIC 371 if (offset == VDESC_NO_OFFSET) 372 panic("puffs_checkop: no vnode, why did you call me?"); 373 #endif 374 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 375 pmp = MPTOPUFFSMP(vp->v_mount); 376 377 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 378 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 379 380 if (!ALLOPS(pmp)) { 381 switch (desc->vdesc_offset) { 382 CHECKOP_NOTSUPP(CREATE); 383 CHECKOP_NOTSUPP(MKNOD); 384 CHECKOP_NOTSUPP(GETATTR); 385 CHECKOP_NOTSUPP(SETATTR); 386 CHECKOP_NOTSUPP(READ); 387 CHECKOP_NOTSUPP(WRITE); 388 CHECKOP_NOTSUPP(FCNTL); 389 CHECKOP_NOTSUPP(IOCTL); 390 CHECKOP_NOTSUPP(REMOVE); 391 CHECKOP_NOTSUPP(LINK); 392 CHECKOP_NOTSUPP(RENAME); 393 CHECKOP_NOTSUPP(MKDIR); 394 CHECKOP_NOTSUPP(RMDIR); 395 CHECKOP_NOTSUPP(SYMLINK); 396 CHECKOP_NOTSUPP(READDIR); 397 CHECKOP_NOTSUPP(READLINK); 398 CHECKOP_NOTSUPP(PRINT); 399 CHECKOP_NOTSUPP(PATHCONF); 400 CHECKOP_NOTSUPP(GETEXTATTR); 401 CHECKOP_NOTSUPP(SETEXTATTR); 402 CHECKOP_NOTSUPP(LISTEXTATTR); 403 CHECKOP_NOTSUPP(DELETEEXTATTR); 404 405 CHECKOP_SUCCESS(ACCESS); 406 CHECKOP_SUCCESS(CLOSE); 407 CHECKOP_SUCCESS(SEEK); 408 409 case VOP_GETPAGES_DESCOFFSET: 410 if (!EXISTSOP(pmp, READ)) 411 return genfs_eopnotsupp(v); 412 break; 413 414 default: 415 panic("puffs_checkop: unhandled vnop %d", 416 desc->vdesc_offset); 417 } 418 } 419 420 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 421 422 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 423 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 424 425 return rv; 426 } 427 428 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 429 struct componentname *); 430 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 431 struct componentname *); 432 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 433 static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); 434 static int flushvncache(struct vnode *, off_t, off_t, bool); 435 static void update_va(struct vnode *, struct vattr *, struct vattr *, 436 struct timespec *, struct timespec *, int); 437 static void update_parent(struct vnode *, struct vnode *); 438 439 440 #define PUFFS_ABORT_LOOKUP 1 441 #define PUFFS_ABORT_CREATE 2 442 #define PUFFS_ABORT_MKNOD 3 443 #define PUFFS_ABORT_MKDIR 4 444 #define PUFFS_ABORT_SYMLINK 5 445 446 /* 447 * Press the pani^Wabort button! Kernel resource allocation failed. 448 */ 449 static void 450 puffs_abortbutton(struct puffs_mount *pmp, int what, 451 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 452 { 453 454 switch (what) { 455 case PUFFS_ABORT_CREATE: 456 case PUFFS_ABORT_MKNOD: 457 case PUFFS_ABORT_SYMLINK: 458 callremove(pmp, dck, ck, cnp); 459 break; 460 case PUFFS_ABORT_MKDIR: 461 callrmdir(pmp, dck, ck, cnp); 462 break; 463 } 464 465 callinactive(pmp, ck, 0); 466 callreclaim(pmp, ck, 1); 467 } 468 469 /* 470 * Begin vnode operations. 471 * 472 * A word from the keymaster about locks: generally we don't want 473 * to use the vnode locks at all: it creates an ugly dependency between 474 * the userlandia file server and the kernel. But we'll play along with 475 * the kernel vnode locks for now. However, even currently we attempt 476 * to release locks as early as possible. This is possible for some 477 * operations which a) don't need a locked vnode after the userspace op 478 * and b) return with the vnode unlocked. Theoretically we could 479 * unlock-do op-lock for others and order the graph in userspace, but I 480 * don't want to think of the consequences for the time being. 481 */ 482 483 #define TTL_TO_TIMEOUT(ts) \ 484 (getticks() + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 485 #define TTL_VALID(ts) \ 486 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 487 #define TIMED_OUT(expire) \ 488 ((int)((unsigned int)getticks() - (unsigned int)expire) > 0) 489 int 490 puffs_vnop_lookup(void *v) 491 { 492 struct vop_lookup_v2_args /* { 493 const struct vnodeop_desc *a_desc; 494 struct vnode *a_dvp; 495 struct vnode **a_vpp; 496 struct componentname *a_cnp; 497 } */ *ap = v; 498 PUFFS_MSG_VARS(vn, lookup); 499 struct puffs_mount *pmp; 500 struct componentname *cnp; 501 struct vnode *vp, *dvp, *cvp; 502 struct puffs_node *dpn, *cpn; 503 int isdot; 504 int error; 505 506 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 507 cnp = ap->a_cnp; 508 dvp = ap->a_dvp; 509 cvp = NULL; 510 cpn = NULL; 511 *ap->a_vpp = NULL; 512 513 /* r/o fs? we check create later to handle EEXIST */ 514 if ((cnp->cn_flags & ISLASTCN) 515 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 516 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 517 return EROFS; 518 519 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 520 521 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 522 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 523 524 /* 525 * If dotdot cache is enabled, add reference to .. and return. 526 */ 527 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 528 vp = VPTOPP(ap->a_dvp)->pn_parent; 529 vref(vp); 530 531 *ap->a_vpp = vp; 532 return 0; 533 } 534 535 /* 536 * Check if someone fed it into the cache 537 */ 538 if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 539 int found, iswhiteout; 540 541 found = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 542 cnp->cn_nameiop, cnp->cn_flags, 543 &iswhiteout, ap->a_vpp); 544 if (iswhiteout) { 545 cnp->cn_flags |= ISWHITEOUT; 546 } 547 548 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 549 cvp = *ap->a_vpp; 550 cpn = VPTOPP(cvp); 551 552 if (TIMED_OUT(cpn->pn_cn_timeout)) { 553 cache_purge(cvp); 554 /* 555 * cached vnode (cvp) is still referenced 556 * so that we can reuse it upon a new 557 * successful lookup. 558 */ 559 *ap->a_vpp = NULL; 560 found = 0; 561 } 562 } 563 564 /* 565 * Do not use negative caching, since the filesystem 566 * provides no TTL for it. 567 */ 568 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 569 found = 0; 570 571 if (found) { 572 return *ap->a_vpp == NULLVP ? ENOENT : 0; 573 } 574 575 /* 576 * This is what would have been left in ERROR before 577 * the rearrangement of cache_lookup(). What with all 578 * the macros, I am not sure if this is a dead value 579 * below or not. 580 */ 581 error = -1; 582 } 583 584 if (isdot) { 585 /* deal with rename lookup semantics */ 586 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 587 return EISDIR; 588 589 vp = ap->a_dvp; 590 vref(vp); 591 *ap->a_vpp = vp; 592 return 0; 593 } 594 595 if (cvp != NULL) { 596 if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { 597 vrele(cvp); 598 cvp = NULL; 599 } else 600 mutex_enter(&cpn->pn_sizemtx); 601 } 602 603 PUFFS_MSG_ALLOC(vn, lookup); 604 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 605 cnp, PUFFS_USE_FULLPNBUF(pmp)); 606 607 if (cnp->cn_flags & ISDOTDOT) 608 VOP_UNLOCK(dvp); 609 610 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 611 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 612 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 613 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 614 615 /* 616 * In case of error, there is no new vnode to play with, so be 617 * happy with the NULL value given to vpp in the beginning. 618 * Also, check if this really was an error or the target was not 619 * present. Either treat it as a non-error for CREATE/RENAME or 620 * enter the component into the negative name cache (if desired). 621 */ 622 if (error) { 623 error = checkerr(pmp, error, __func__); 624 if (error == ENOENT) { 625 /* don't allow to create files on r/o fs */ 626 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 627 && cnp->cn_nameiop == CREATE) { 628 error = EROFS; 629 630 /* adjust values if we are creating */ 631 } else if ((cnp->cn_flags & ISLASTCN) 632 && (cnp->cn_nameiop == CREATE 633 || cnp->cn_nameiop == RENAME)) { 634 error = EJUSTRETURN; 635 636 /* save negative cache entry */ 637 } else { 638 if (PUFFS_USE_NAMECACHE(pmp) && 639 !PUFFS_USE_FS_TTL(pmp)) 640 cache_enter(dvp, NULL, cnp->cn_nameptr, 641 cnp->cn_namelen, cnp->cn_flags); 642 } 643 } 644 goto out; 645 } 646 647 /* 648 * Check that we don't get our parent node back, that would cause 649 * a pretty obvious deadlock. 650 */ 651 dpn = dvp->v_data; 652 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 653 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 654 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 655 error = EPROTO; 656 goto out; 657 } 658 659 /* 660 * Check if we looked up the cached vnode 661 */ 662 vp = NULL; 663 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 664 int grace; 665 666 /* 667 * Bump grace time of this node so that it does not get 668 * reclaimed too fast. We try to increase a bit more the 669 * lifetime of busiest * nodes - with some limits. 670 */ 671 grace = 10 * puffs_sopreq_expire_timeout; 672 cpn->pn_cn_grace = getticks() + grace; 673 vp = cvp; 674 } 675 676 /* 677 * No cached vnode available, or the cached vnode does not 678 * match the userland cookie anymore: is the node known? 679 */ 680 if (vp == NULL) { 681 error = puffs_getvnode(dvp->v_mount, 682 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 683 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 684 if (error) { 685 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 686 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 687 ap->a_cnp); 688 goto out; 689 } 690 691 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 692 } 693 694 /* 695 * Update cache and TTL 696 */ 697 if (PUFFS_USE_FS_TTL(pmp)) { 698 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 699 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 700 update_va(vp, NULL, &lookup_msg->pvnr_va, 701 va_ttl, cn_ttl, SETATTR_CHSIZE); 702 } 703 704 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 705 *ap->a_vpp = vp; 706 707 if (PUFFS_USE_NAMECACHE(pmp)) 708 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 709 cnp->cn_flags); 710 711 /* XXX */ 712 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 713 cnp->cn_flags &= ~REQUIREDIR; 714 if (lookup_msg->pvnr_cn.pkcn_consume) 715 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 716 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 717 718 VPTOPP(vp)->pn_nlookup++; 719 720 if (PUFFS_USE_DOTDOTCACHE(pmp) && 721 (VPTOPP(vp)->pn_parent != dvp)) 722 update_parent(vp, dvp); 723 724 out: 725 if (cvp != NULL) { 726 mutex_exit(&cpn->pn_sizemtx); 727 728 if (error || (cvp != vp)) 729 vput(cvp); 730 } 731 if (error == 0) 732 VOP_UNLOCK(*ap->a_vpp); 733 734 if (cnp->cn_flags & ISDOTDOT) 735 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 736 737 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 738 PUFFS_MSG_RELEASE(lookup); 739 return error; 740 } 741 742 #define REFPN_AND_UNLOCKVP(a, b) \ 743 do { \ 744 mutex_enter(&b->pn_mtx); \ 745 puffs_referencenode(b); \ 746 mutex_exit(&b->pn_mtx); \ 747 VOP_UNLOCK(a); \ 748 } while (/*CONSTCOND*/0) 749 750 #define REFPN(b) \ 751 do { \ 752 mutex_enter(&b->pn_mtx); \ 753 puffs_referencenode(b); \ 754 mutex_exit(&b->pn_mtx); \ 755 } while (/*CONSTCOND*/0) 756 757 #define RELEPN_AND_VP(a, b) \ 758 do { \ 759 puffs_releasenode(b); \ 760 vrele(a); \ 761 } while (/*CONSTCOND*/0) 762 763 int 764 puffs_vnop_create(void *v) 765 { 766 struct vop_create_v3_args /* { 767 const struct vnodeop_desc *a_desc; 768 struct vnode *a_dvp; 769 struct vnode **a_vpp; 770 struct componentname *a_cnp; 771 struct vattr *a_vap; 772 } */ *ap = v; 773 PUFFS_MSG_VARS(vn, create); 774 struct vnode *dvp = ap->a_dvp; 775 struct puffs_node *dpn = VPTOPP(dvp); 776 struct componentname *cnp = ap->a_cnp; 777 struct mount *mp = dvp->v_mount; 778 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 779 int error; 780 781 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 782 dvp, ap->a_cnp->cn_nameptr)); 783 784 PUFFS_MSG_ALLOC(vn, create); 785 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 786 cnp, PUFFS_USE_FULLPNBUF(pmp)); 787 create_msg->pvnr_va = *ap->a_vap; 788 puffs_msg_setinfo(park_create, PUFFSOP_VN, 789 PUFFS_VN_CREATE, VPTOPNC(dvp)); 790 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 791 792 error = checkerr(pmp, error, __func__); 793 if (error) 794 goto out; 795 796 error = puffs_newnode(mp, dvp, ap->a_vpp, 797 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 798 if (error) { 799 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 800 create_msg->pvnr_newnode, cnp); 801 goto out; 802 } 803 804 if (PUFFS_USE_FS_TTL(pmp)) { 805 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 806 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 807 struct vattr *rvap = &create_msg->pvnr_va; 808 809 update_va(*ap->a_vpp, NULL, rvap, 810 va_ttl, cn_ttl, SETATTR_CHSIZE); 811 } 812 813 VPTOPP(*ap->a_vpp)->pn_nlookup++; 814 815 if (PUFFS_USE_DOTDOTCACHE(pmp) && 816 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 817 update_parent(*ap->a_vpp, dvp); 818 819 out: 820 DPRINTF(("puffs_create: return %d\n", error)); 821 PUFFS_MSG_RELEASE(create); 822 return error; 823 } 824 825 int 826 puffs_vnop_mknod(void *v) 827 { 828 struct vop_mknod_v3_args /* { 829 const struct vnodeop_desc *a_desc; 830 struct vnode *a_dvp; 831 struct vnode **a_vpp; 832 struct componentname *a_cnp; 833 struct vattr *a_vap; 834 } */ *ap = v; 835 PUFFS_MSG_VARS(vn, mknod); 836 struct vnode *dvp = ap->a_dvp; 837 struct puffs_node *dpn = VPTOPP(dvp); 838 struct componentname *cnp = ap->a_cnp; 839 struct mount *mp = dvp->v_mount; 840 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 841 int error; 842 843 PUFFS_MSG_ALLOC(vn, mknod); 844 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 845 cnp, PUFFS_USE_FULLPNBUF(pmp)); 846 mknod_msg->pvnr_va = *ap->a_vap; 847 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 848 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 849 850 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 851 852 error = checkerr(pmp, error, __func__); 853 if (error) 854 goto out; 855 856 error = puffs_newnode(mp, dvp, ap->a_vpp, 857 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 858 ap->a_vap->va_rdev); 859 if (error) { 860 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 861 mknod_msg->pvnr_newnode, cnp); 862 goto out; 863 } 864 865 if (PUFFS_USE_FS_TTL(pmp)) { 866 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 867 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 868 struct vattr *rvap = &mknod_msg->pvnr_va; 869 870 update_va(*ap->a_vpp, NULL, rvap, 871 va_ttl, cn_ttl, SETATTR_CHSIZE); 872 } 873 874 VPTOPP(*ap->a_vpp)->pn_nlookup++; 875 876 if (PUFFS_USE_DOTDOTCACHE(pmp) && 877 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 878 update_parent(*ap->a_vpp, dvp); 879 880 out: 881 PUFFS_MSG_RELEASE(mknod); 882 return error; 883 } 884 885 int 886 puffs_vnop_open(void *v) 887 { 888 struct vop_open_args /* { 889 const struct vnodeop_desc *a_desc; 890 struct vnode *a_vp; 891 int a_mode; 892 kauth_cred_t a_cred; 893 } */ *ap = v; 894 PUFFS_MSG_VARS(vn, open); 895 struct vnode *vp = ap->a_vp; 896 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 897 struct puffs_node *pn = VPTOPP(vp); 898 int mode = ap->a_mode; 899 int error; 900 901 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 902 903 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 904 ERROUT(EROFS); 905 906 if (!EXISTSOP(pmp, OPEN)) 907 ERROUT(0); 908 909 PUFFS_MSG_ALLOC(vn, open); 910 open_msg->pvnr_mode = mode; 911 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 912 puffs_msg_setinfo(park_open, PUFFSOP_VN, 913 PUFFS_VN_OPEN, VPTOPNC(vp)); 914 915 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 916 error = checkerr(pmp, error, __func__); 917 918 if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { 919 /* 920 * Flush cache: 921 * - we do not want to discard cached write by direct write 922 * - read cache is now useless and should be freed 923 */ 924 mutex_enter(&pn->pn_sizemtx); 925 flushvncache(vp, 0, 0, true); 926 mutex_exit(&pn->pn_sizemtx); 927 928 if (mode & FREAD) 929 pn->pn_stat |= PNODE_RDIRECT; 930 if (mode & FWRITE) 931 pn->pn_stat |= PNODE_WDIRECT; 932 } 933 out: 934 DPRINTF(("puffs_open: returning %d\n", error)); 935 PUFFS_MSG_RELEASE(open); 936 return error; 937 } 938 939 int 940 puffs_vnop_close(void *v) 941 { 942 struct vop_close_args /* { 943 const struct vnodeop_desc *a_desc; 944 struct vnode *a_vp; 945 int a_fflag; 946 kauth_cred_t a_cred; 947 } */ *ap = v; 948 PUFFS_MSG_VARS(vn, close); 949 struct vnode *vp = ap->a_vp; 950 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 951 952 PUFFS_MSG_ALLOC(vn, close); 953 puffs_msg_setfaf(park_close); 954 close_msg->pvnr_fflag = ap->a_fflag; 955 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 956 puffs_msg_setinfo(park_close, PUFFSOP_VN, 957 PUFFS_VN_CLOSE, VPTOPNC(vp)); 958 959 puffs_msg_enqueue(pmp, park_close); 960 PUFFS_MSG_RELEASE(close); 961 return 0; 962 } 963 964 int 965 puffs_vnop_access(void *v) 966 { 967 struct vop_access_args /* { 968 const struct vnodeop_desc *a_desc; 969 struct vnode *a_vp; 970 accmode_t a_accmode; 971 kauth_cred_t a_cred; 972 } */ *ap = v; 973 PUFFS_MSG_VARS(vn, access); 974 struct vnode *vp = ap->a_vp; 975 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 976 accmode_t accmode = ap->a_accmode; 977 int error; 978 979 if (accmode & VWRITE) { 980 switch (vp->v_type) { 981 case VDIR: 982 case VLNK: 983 case VREG: 984 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 985 || !EXISTSOP(pmp, WRITE)) 986 return EROFS; 987 break; 988 default: 989 break; 990 } 991 } 992 993 if (!EXISTSOP(pmp, ACCESS)) 994 return 0; 995 996 PUFFS_MSG_ALLOC(vn, access); 997 access_msg->pvnr_mode = ap->a_accmode; 998 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 999 puffs_msg_setinfo(park_access, PUFFSOP_VN, 1000 PUFFS_VN_ACCESS, VPTOPNC(vp)); 1001 1002 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 1003 error = checkerr(pmp, error, __func__); 1004 PUFFS_MSG_RELEASE(access); 1005 1006 return error; 1007 } 1008 1009 static void 1010 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 1011 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 1012 { 1013 struct puffs_node *pn = VPTOPP(vp); 1014 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1015 int use_metacache; 1016 1017 if (TTL_VALID(cn_ttl)) { 1018 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1019 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1020 } 1021 1022 /* 1023 * Don't listen to the file server regarding special device 1024 * size info, the file server doesn't know anything about them. 1025 */ 1026 if (vp->v_type == VBLK || vp->v_type == VCHR) 1027 rvap->va_size = vp->v_size; 1028 1029 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1030 if (vp->v_type == VBLK) 1031 rvap->va_blocksize = BLKDEV_IOSIZE; 1032 else if (vp->v_type == VCHR) 1033 rvap->va_blocksize = MAXBSIZE; 1034 1035 if (vap != NULL) { 1036 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1037 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1038 1039 if (PUFFS_USE_METAFLUSH(pmp)) { 1040 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1041 vap->va_atime = pn->pn_mc_atime; 1042 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1043 vap->va_ctime = pn->pn_mc_ctime; 1044 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1045 vap->va_mtime = pn->pn_mc_mtime; 1046 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1047 vap->va_size = pn->pn_mc_size; 1048 } 1049 } 1050 1051 use_metacache = PUFFS_USE_METAFLUSH(pmp) && 1052 (pn->pn_stat & PNODE_METACACHE_SIZE); 1053 if (!use_metacache && (flags & SETATTR_CHSIZE)) { 1054 if (rvap->va_size != VNOVAL 1055 && vp->v_type != VBLK && vp->v_type != VCHR) { 1056 uvm_vnp_setsize(vp, rvap->va_size); 1057 pn->pn_serversize = rvap->va_size; 1058 } 1059 } 1060 1061 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1062 if (pn->pn_va_cache == NULL) 1063 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1064 1065 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1066 1067 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1068 } 1069 } 1070 1071 static void 1072 update_parent(struct vnode *vp, struct vnode *dvp) 1073 { 1074 struct puffs_node *pn = VPTOPP(vp); 1075 1076 if (pn->pn_parent != NULL) { 1077 KASSERT(pn->pn_parent != dvp); 1078 vrele(pn->pn_parent); 1079 } 1080 1081 vref(dvp); 1082 pn->pn_parent = dvp; 1083 } 1084 1085 int 1086 puffs_vnop_getattr(void *v) 1087 { 1088 struct vop_getattr_args /* { 1089 const struct vnodeop_desc *a_desc; 1090 struct vnode *a_vp; 1091 struct vattr *a_vap; 1092 kauth_cred_t a_cred; 1093 } */ *ap = v; 1094 PUFFS_MSG_VARS(vn, getattr); 1095 struct vnode *vp = ap->a_vp; 1096 struct mount *mp = vp->v_mount; 1097 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1098 struct vattr *vap, *rvap; 1099 struct puffs_node *pn = VPTOPP(vp); 1100 struct timespec *va_ttl = NULL; 1101 int error = 0; 1102 1103 /* 1104 * A lock is required so that we do not race with 1105 * setattr, write and fsync when changing vp->v_size. 1106 * This is critical, since setting a stall smaler value 1107 * triggers a file truncate in uvm_vnp_setsize(), which 1108 * most of the time means data corruption (a chunk of 1109 * data is replaced by zeroes). This can be removed if 1110 * we decide one day that VOP_GETATTR must operate on 1111 * a locked vnode. 1112 * 1113 * XXX Should be useless now that VOP_GETATTR has been 1114 * fixed to always require a shared lock at least. 1115 */ 1116 mutex_enter(&pn->pn_sizemtx); 1117 1118 REFPN(pn); 1119 vap = ap->a_vap; 1120 1121 if (PUFFS_USE_FS_TTL(pmp)) { 1122 if (!TIMED_OUT(pn->pn_va_timeout)) { 1123 update_va(vp, vap, pn->pn_va_cache, 1124 NULL, NULL, SETATTR_CHSIZE); 1125 goto out2; 1126 } 1127 } 1128 1129 PUFFS_MSG_ALLOC(vn, getattr); 1130 vattr_null(&getattr_msg->pvnr_va); 1131 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1132 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1133 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1134 1135 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1136 error = checkerr(pmp, error, __func__); 1137 if (error) 1138 goto out; 1139 1140 rvap = &getattr_msg->pvnr_va; 1141 1142 if (PUFFS_USE_FS_TTL(pmp)) 1143 va_ttl = &getattr_msg->pvnr_va_ttl; 1144 1145 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1146 1147 out: 1148 PUFFS_MSG_RELEASE(getattr); 1149 1150 out2: 1151 puffs_releasenode(pn); 1152 1153 mutex_exit(&pn->pn_sizemtx); 1154 1155 return error; 1156 } 1157 1158 static void 1159 zerofill_lastpage(struct vnode *vp, voff_t off) 1160 { 1161 1162 if (trunc_page(off) == off) 1163 return; 1164 1165 if (vp->v_writecount == 0) 1166 return; 1167 1168 vsize_t len = round_page(off) - off; 1169 ubc_zerorange(&vp->v_uobj, off, len, UBC_WRITE|UBC_VNODE_FLAGS(vp)); 1170 } 1171 1172 static int 1173 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1174 { 1175 PUFFS_MSG_VARS(vn, setattr); 1176 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1177 struct puffs_node *pn = vp->v_data; 1178 vsize_t oldsize = vp->v_size; 1179 int error = 0; 1180 1181 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1182 1183 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1184 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1185 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1186 || vap->va_mode != (mode_t)VNOVAL)) 1187 return EROFS; 1188 1189 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1190 && vp->v_type == VREG && vap->va_size != VNOVAL) 1191 return EROFS; 1192 1193 /* 1194 * Flush metacache first. If we are called with some explicit 1195 * parameters, treat them as information overriding metacache 1196 * information. 1197 */ 1198 if (PUFFS_USE_METAFLUSH(pmp) && pn->pn_stat & PNODE_METACACHE_MASK) { 1199 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1200 && vap->va_atime.tv_sec == VNOVAL) 1201 vap->va_atime = pn->pn_mc_atime; 1202 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1203 && vap->va_ctime.tv_sec == VNOVAL) 1204 vap->va_ctime = pn->pn_mc_ctime; 1205 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1206 && vap->va_mtime.tv_sec == VNOVAL) 1207 vap->va_mtime = pn->pn_mc_mtime; 1208 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1209 && vap->va_size == VNOVAL) 1210 vap->va_size = pn->pn_mc_size; 1211 1212 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1213 } 1214 1215 /* 1216 * Flush attribute cache so that another thread do 1217 * not get a stale value during the operation. 1218 */ 1219 if (PUFFS_USE_FS_TTL(pmp)) 1220 pn->pn_va_timeout = 0; 1221 1222 PUFFS_MSG_ALLOC(vn, setattr); 1223 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1224 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1225 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1226 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1227 if (flags & SETATTR_ASYNC) 1228 puffs_msg_setfaf(park_setattr); 1229 1230 puffs_msg_enqueue(pmp, park_setattr); 1231 if ((flags & SETATTR_ASYNC) == 0) { 1232 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1233 1234 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1235 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1236 struct vattr *rvap = &setattr_msg->pvnr_va; 1237 1238 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1239 } 1240 } 1241 1242 PUFFS_MSG_RELEASE(setattr); 1243 if ((flags & SETATTR_ASYNC) == 0) { 1244 error = checkerr(pmp, error, __func__); 1245 if (error) 1246 return error; 1247 } else { 1248 error = 0; 1249 } 1250 1251 if (vap->va_size != VNOVAL) { 1252 /* 1253 * If we truncated the file, make sure the data beyond 1254 * EOF in last page does not remain in cache, otherwise 1255 * if the file is later truncated to a larger size (creating 1256 * a hole), that area will not return zeroes as it 1257 * should. 1258 */ 1259 if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && 1260 (vap->va_size < oldsize)) 1261 zerofill_lastpage(vp, vap->va_size); 1262 1263 pn->pn_serversize = vap->va_size; 1264 if (flags & SETATTR_CHSIZE) 1265 uvm_vnp_setsize(vp, vap->va_size); 1266 puffs_updatenode(pn, PUFFS_UPDATECTIME | PUFFS_UPDATEMTIME, 0); 1267 } 1268 1269 return 0; 1270 } 1271 1272 int 1273 puffs_vnop_setattr(void *v) 1274 { 1275 struct vop_getattr_args /* { 1276 const struct vnodeop_desc *a_desc; 1277 struct vnode *a_vp; 1278 struct vattr *a_vap; 1279 kauth_cred_t a_cred; 1280 } */ *ap = v; 1281 struct puffs_node *pn = ap->a_vp->v_data; 1282 int error; 1283 1284 mutex_enter(&pn->pn_sizemtx); 1285 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1286 mutex_exit(&pn->pn_sizemtx); 1287 1288 return error; 1289 } 1290 1291 static __inline int 1292 doinact(struct puffs_mount *pmp, int iaflag) 1293 { 1294 1295 if (EXISTSOP(pmp, INACTIVE)) 1296 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1297 if (iaflag || ALLOPS(pmp)) 1298 return 1; 1299 else 1300 return 0; 1301 else 1302 return 1; 1303 else 1304 return 0; 1305 } 1306 1307 static void 1308 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1309 { 1310 PUFFS_MSG_VARS(vn, inactive); 1311 1312 if (doinact(pmp, iaflag)) { 1313 PUFFS_MSG_ALLOC(vn, inactive); 1314 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1315 PUFFS_VN_INACTIVE, ck); 1316 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1317 PUFFS_MSG_RELEASE(inactive); 1318 } 1319 } 1320 1321 /* XXX: callinactive can't setback */ 1322 int 1323 puffs_vnop_inactive(void *v) 1324 { 1325 struct vop_inactive_v2_args /* { 1326 const struct vnodeop_desc *a_desc; 1327 struct vnode *a_vp; 1328 } */ *ap = v; 1329 PUFFS_MSG_VARS(vn, inactive); 1330 struct vnode *vp = ap->a_vp; 1331 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1332 struct puffs_node *pnode; 1333 bool recycle = false; 1334 1335 /* 1336 * When puffs_cookie2vnode() misses an entry, vcache_get() 1337 * creates a new node (puffs_vfsop_loadvnode being called to 1338 * initialize the PUFFS part), then it discovers it is VNON, 1339 * and tries to vrele() it. This leads us there, while the 1340 * cookie was stall and the node likely already reclaimed. 1341 */ 1342 if (vp->v_type == VNON) { 1343 return 0; 1344 } 1345 1346 pnode = vp->v_data; 1347 mutex_enter(&pnode->pn_sizemtx); 1348 1349 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1350 flushvncache(vp, 0, 0, false); 1351 PUFFS_MSG_ALLOC(vn, inactive); 1352 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1353 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1354 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1355 NULL); 1356 PUFFS_MSG_RELEASE(inactive); 1357 } 1358 pnode->pn_stat &= ~PNODE_DOINACT; 1359 1360 /* 1361 * file server thinks it's gone? then don't be afraid care, 1362 * node's life was already all it would ever be 1363 */ 1364 if (pnode->pn_stat & PNODE_NOREFS) { 1365 pnode->pn_stat |= PNODE_DYING; 1366 recycle = true; 1367 } 1368 1369 /* 1370 * Handle node TTL. 1371 * If grace has already timed out, make it reclaimed. 1372 * Otherwise, we queue its expiration by sop thread, so 1373 * that it does not remain for ages in the freelist, 1374 * holding memory in userspace, while we will have 1375 * to look it up again anyway. 1376 */ 1377 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1378 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1379 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1380 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1381 1382 if (!incache && !ingrace && !reclaimqueued) { 1383 pnode->pn_stat |= PNODE_DYING; 1384 recycle = true; 1385 } 1386 1387 if (!recycle && !reclaimqueued) { 1388 struct puffs_sopreq *psopr; 1389 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1390 1391 KASSERT(curlwp != uvm.pagedaemon_lwp); 1392 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1393 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1394 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1395 psopr->psopr_at = at; 1396 1397 mutex_enter(&pmp->pmp_sopmtx); 1398 1399 /* 1400 * If thread has disapeared, just give up. The 1401 * fs is being unmounted and the node will be 1402 * be reclaimed anyway. 1403 * 1404 * Otherwise, we queue the request but do not 1405 * immediatly signal the thread, as the node 1406 * has not been expired yet. 1407 */ 1408 if (pmp->pmp_sopthrcount == 0) { 1409 kmem_free(psopr, sizeof(*psopr)); 1410 } else { 1411 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1412 psopr, psopr_entries); 1413 pnode->pn_stat |= PNODE_SOPEXP; 1414 } 1415 1416 mutex_exit(&pmp->pmp_sopmtx); 1417 } 1418 } 1419 1420 /* 1421 * Wipe direct I/O flags 1422 */ 1423 pnode->pn_stat &= ~(PNODE_RDIRECT|PNODE_WDIRECT); 1424 1425 *ap->a_recycle = recycle; 1426 1427 mutex_exit(&pnode->pn_sizemtx); 1428 1429 return 0; 1430 } 1431 1432 static void 1433 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1434 { 1435 PUFFS_MSG_VARS(vn, reclaim); 1436 1437 if (!EXISTSOP(pmp, RECLAIM)) 1438 return; 1439 1440 PUFFS_MSG_ALLOC(vn, reclaim); 1441 reclaim_msg->pvnr_nlookup = nlookup; 1442 puffs_msg_setfaf(park_reclaim); 1443 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1444 1445 puffs_msg_enqueue(pmp, park_reclaim); 1446 PUFFS_MSG_RELEASE(reclaim); 1447 return; 1448 } 1449 1450 /* 1451 * always FAF, we don't really care if the server wants to fail to 1452 * reclaim the node or not 1453 */ 1454 int 1455 puffs_vnop_reclaim(void *v) 1456 { 1457 struct vop_reclaim_v2_args /* { 1458 const struct vnodeop_desc *a_desc; 1459 struct vnode *a_vp; 1460 } */ *ap = v; 1461 struct vnode *vp = ap->a_vp; 1462 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1463 bool notifyserver = true; 1464 1465 VOP_UNLOCK(vp); 1466 1467 /* 1468 * first things first: check if someone is trying to reclaim the 1469 * root vnode. do not allow that to travel to userspace. 1470 * Note that we don't need to take the lock similarly to 1471 * puffs_root(), since there is only one of us. 1472 */ 1473 if (vp->v_vflag & VV_ROOT) { 1474 mutex_enter(&pmp->pmp_lock); 1475 KASSERT(pmp->pmp_root != NULL); 1476 pmp->pmp_root = NULL; 1477 mutex_exit(&pmp->pmp_lock); 1478 notifyserver = false; 1479 } 1480 1481 /* See the comment on top of puffs_vnop_inactive(). */ 1482 if (vp->v_type == VNON) 1483 notifyserver = false; 1484 1485 /* 1486 * purge info from kernel before issueing FAF, since we 1487 * don't really know when we'll get around to it after 1488 * that and someone might race us into node creation 1489 */ 1490 mutex_enter(&pmp->pmp_lock); 1491 if (PUFFS_USE_NAMECACHE(pmp)) 1492 cache_purge(vp); 1493 mutex_exit(&pmp->pmp_lock); 1494 1495 if (notifyserver) { 1496 int nlookup = VPTOPP(vp)->pn_nlookup; 1497 1498 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1499 } 1500 1501 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1502 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1503 vrele(VPTOPP(vp)->pn_parent); 1504 else 1505 KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); 1506 } 1507 1508 puffs_putvnode(vp); 1509 1510 return 0; 1511 } 1512 1513 #define CSIZE sizeof(**ap->a_cookies) 1514 int 1515 puffs_vnop_readdir(void *v) 1516 { 1517 struct vop_readdir_args /* { 1518 const struct vnodeop_desc *a_desc; 1519 struct vnode *a_vp; 1520 struct uio *a_uio; 1521 kauth_cred_t a_cred; 1522 int *a_eofflag; 1523 off_t **a_cookies; 1524 int *a_ncookies; 1525 } */ *ap = v; 1526 PUFFS_MSG_VARS(vn, readdir); 1527 struct vnode *vp = ap->a_vp; 1528 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1529 size_t argsize, tomove, cookiemem, cookiesmax; 1530 struct uio *uio = ap->a_uio; 1531 size_t howmuch, resid; 1532 int error; 1533 1534 /* 1535 * ok, so we need: resid + cookiemem = maxreq 1536 * => resid + cookiesize * (resid/minsize) = maxreq 1537 * => resid + cookiesize/minsize * resid = maxreq 1538 * => (cookiesize/minsize + 1) * resid = maxreq 1539 * => resid = maxreq / (cookiesize/minsize + 1) 1540 * 1541 * Since cookiesize <= minsize and we're not very big on floats, 1542 * we approximate that to be 1. Therefore: 1543 * 1544 * resid = maxreq / 2; 1545 * 1546 * Well, at least we didn't have to use differential equations 1547 * or the Gram-Schmidt process. 1548 * 1549 * (yes, I'm very afraid of this) 1550 */ 1551 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1552 1553 if (ap->a_cookies) { 1554 KASSERT(ap->a_ncookies != NULL); 1555 if (pmp->pmp_args.pa_fhsize == 0) 1556 return EOPNOTSUPP; 1557 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1558 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1559 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1560 } else { 1561 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1562 cookiesmax = 0; 1563 cookiemem = 0; 1564 } 1565 1566 argsize = sizeof(struct puffs_vnmsg_readdir); 1567 tomove = resid + cookiemem; 1568 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1569 (void *)&readdir_msg, 1); 1570 1571 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1572 readdir_msg->pvnr_offset = uio->uio_offset; 1573 readdir_msg->pvnr_resid = resid; 1574 readdir_msg->pvnr_ncookies = cookiesmax; 1575 readdir_msg->pvnr_eofflag = 0; 1576 readdir_msg->pvnr_dentoff = cookiemem; 1577 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1578 PUFFS_VN_READDIR, VPTOPNC(vp)); 1579 puffs_msg_setdelta(park_readdir, tomove); 1580 1581 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1582 error = checkerr(pmp, error, __func__); 1583 if (error) 1584 goto out; 1585 1586 /* userspace is cheating? */ 1587 if (readdir_msg->pvnr_resid > resid) { 1588 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1589 "resid grew", VPTOPNC(vp)); 1590 ERROUT(EPROTO); 1591 } 1592 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1593 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1594 "too many cookies", VPTOPNC(vp)); 1595 ERROUT(EPROTO); 1596 } 1597 1598 /* check eof */ 1599 if (readdir_msg->pvnr_eofflag) 1600 *ap->a_eofflag = 1; 1601 1602 /* bouncy-wouncy with the directory data */ 1603 howmuch = resid - readdir_msg->pvnr_resid; 1604 1605 /* force eof if no data was returned (getcwd() needs this) */ 1606 if (howmuch == 0) { 1607 *ap->a_eofflag = 1; 1608 goto out; 1609 } 1610 1611 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1612 if (error) 1613 goto out; 1614 1615 /* provide cookies to caller if so desired */ 1616 if (ap->a_cookies) { 1617 KASSERT(curlwp != uvm.pagedaemon_lwp); 1618 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1619 M_TEMP, M_WAITOK); 1620 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1621 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1622 *ap->a_ncookies*CSIZE); 1623 } 1624 1625 /* next readdir starts here */ 1626 uio->uio_offset = readdir_msg->pvnr_offset; 1627 1628 out: 1629 puffs_msgmem_release(park_readdir); 1630 return error; 1631 } 1632 #undef CSIZE 1633 1634 /* 1635 * poll works by consuming the bitmask in pn_revents. If there are 1636 * events available, poll returns immediately. If not, it issues a 1637 * poll to userspace, selrecords itself and returns with no available 1638 * events. When the file server returns, it executes puffs_parkdone_poll(), 1639 * where available events are added to the bitmask. selnotify() is 1640 * then also executed by that function causing us to enter here again 1641 * and hopefully find the missing bits (unless someone got them first, 1642 * in which case it starts all over again). 1643 */ 1644 int 1645 puffs_vnop_poll(void *v) 1646 { 1647 struct vop_poll_args /* { 1648 const struct vnodeop_desc *a_desc; 1649 struct vnode *a_vp; 1650 int a_events; 1651 } */ *ap = v; 1652 PUFFS_MSG_VARS(vn, poll); 1653 struct vnode *vp = ap->a_vp; 1654 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1655 struct puffs_node *pn = vp->v_data; 1656 int events; 1657 1658 if (EXISTSOP(pmp, POLL)) { 1659 mutex_enter(&pn->pn_mtx); 1660 events = pn->pn_revents & ap->a_events; 1661 if (events & ap->a_events) { 1662 pn->pn_revents &= ~ap->a_events; 1663 mutex_exit(&pn->pn_mtx); 1664 1665 return events; 1666 } else { 1667 puffs_referencenode(pn); 1668 mutex_exit(&pn->pn_mtx); 1669 1670 PUFFS_MSG_ALLOC(vn, poll); 1671 poll_msg->pvnr_events = ap->a_events; 1672 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1673 PUFFS_VN_POLL, VPTOPNC(vp)); 1674 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1675 selrecord(curlwp, &pn->pn_sel); 1676 1677 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1678 vp->v_data, NULL); 1679 PUFFS_MSG_RELEASE(poll); 1680 1681 return 0; 1682 } 1683 } else { 1684 return genfs_poll(v); 1685 } 1686 } 1687 1688 static int 1689 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1690 { 1691 struct puffs_node *pn = VPTOPP(vp); 1692 struct vattr va; 1693 int pflags, error; 1694 1695 /* flush out information from our metacache, see vop_setattr */ 1696 if (pn->pn_stat & PNODE_METACACHE_MASK 1697 && (pn->pn_stat & PNODE_DYING) == 0) { 1698 vattr_null(&va); 1699 error = dosetattr(vp, &va, FSCRED, 1700 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1701 if (error) 1702 return error; 1703 } 1704 1705 /* 1706 * flush pages to avoid being overly dirty 1707 */ 1708 pflags = PGO_CLEANIT; 1709 if (wait) 1710 pflags |= PGO_SYNCIO; 1711 1712 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 1713 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1714 } 1715 1716 int 1717 puffs_vnop_fsync(void *v) 1718 { 1719 struct vop_fsync_args /* { 1720 const struct vnodeop_desc *a_desc; 1721 struct vnode *a_vp; 1722 kauth_cred_t a_cred; 1723 int a_flags; 1724 off_t a_offlo; 1725 off_t a_offhi; 1726 } */ *ap = v; 1727 PUFFS_MSG_VARS(vn, fsync); 1728 struct vnode *vp; 1729 struct puffs_node *pn; 1730 struct puffs_mount *pmp; 1731 int error, dofaf; 1732 1733 vp = ap->a_vp; 1734 KASSERT(vp != NULL); 1735 pn = VPTOPP(vp); 1736 KASSERT(pn != NULL); 1737 pmp = MPTOPUFFSMP(vp->v_mount); 1738 1739 /* See the comment on top of puffs_vnop_inactive(). */ 1740 if (vp->v_type == VNON) 1741 return 0; 1742 1743 if (ap->a_flags & FSYNC_WAIT) { 1744 mutex_enter(&pn->pn_sizemtx); 1745 } else { 1746 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1747 return EDEADLK; 1748 } 1749 1750 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1751 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1752 if (error) 1753 goto out; 1754 1755 /* 1756 * HELLO! We exit already here if the user server does not 1757 * support fsync OR if we should call fsync for a node which 1758 * has references neither in the kernel or the fs server. 1759 * Otherwise we continue to issue fsync() forward. 1760 */ 1761 error = 0; 1762 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1763 goto out; 1764 1765 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1766 /* 1767 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1768 * only FAFs for those. Otherwise there's a danger of deadlock, 1769 * since the execution context here might be the user server 1770 * doing some operation on another fs, which in turn caused a 1771 * vnode to be reclaimed from the freelist for this fs. 1772 */ 1773 if (dofaf == 0) { 1774 mutex_enter(vp->v_interlock); 1775 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1776 dofaf = 1; 1777 mutex_exit(vp->v_interlock); 1778 } 1779 1780 PUFFS_MSG_ALLOC(vn, fsync); 1781 if (dofaf) 1782 puffs_msg_setfaf(park_fsync); 1783 1784 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1785 fsync_msg->pvnr_flags = ap->a_flags; 1786 fsync_msg->pvnr_offlo = ap->a_offlo; 1787 fsync_msg->pvnr_offhi = ap->a_offhi; 1788 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1789 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1790 1791 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1792 PUFFS_MSG_RELEASE(fsync); 1793 1794 error = checkerr(pmp, error, __func__); 1795 1796 out: 1797 mutex_exit(&pn->pn_sizemtx); 1798 return error; 1799 } 1800 1801 int 1802 puffs_vnop_seek(void *v) 1803 { 1804 struct vop_seek_args /* { 1805 const struct vnodeop_desc *a_desc; 1806 struct vnode *a_vp; 1807 off_t a_oldoff; 1808 off_t a_newoff; 1809 kauth_cred_t a_cred; 1810 } */ *ap = v; 1811 PUFFS_MSG_VARS(vn, seek); 1812 struct vnode *vp = ap->a_vp; 1813 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1814 int error; 1815 1816 PUFFS_MSG_ALLOC(vn, seek); 1817 seek_msg->pvnr_oldoff = ap->a_oldoff; 1818 seek_msg->pvnr_newoff = ap->a_newoff; 1819 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1820 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1821 PUFFS_VN_SEEK, VPTOPNC(vp)); 1822 1823 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1824 PUFFS_MSG_RELEASE(seek); 1825 return checkerr(pmp, error, __func__); 1826 } 1827 1828 static int 1829 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1830 struct componentname *cnp) 1831 { 1832 PUFFS_MSG_VARS(vn, remove); 1833 int error; 1834 1835 PUFFS_MSG_ALLOC(vn, remove); 1836 remove_msg->pvnr_cookie_targ = ck; 1837 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1838 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1839 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1840 1841 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1842 PUFFS_MSG_RELEASE(remove); 1843 1844 return checkerr(pmp, error, __func__); 1845 } 1846 1847 /* 1848 * XXX: can't use callremove now because can't catch setbacks with 1849 * it due to lack of a pnode argument. 1850 */ 1851 int 1852 puffs_vnop_remove(void *v) 1853 { 1854 struct vop_remove_v2_args /* { 1855 const struct vnodeop_desc *a_desc; 1856 struct vnode *a_dvp; 1857 struct vnode *a_vp; 1858 struct componentname *a_cnp; 1859 } */ *ap = v; 1860 PUFFS_MSG_VARS(vn, remove); 1861 struct vnode *dvp = ap->a_dvp; 1862 struct vnode *vp = ap->a_vp; 1863 struct puffs_node *dpn = VPTOPP(dvp); 1864 struct puffs_node *pn = VPTOPP(vp); 1865 struct componentname *cnp = ap->a_cnp; 1866 struct mount *mp = dvp->v_mount; 1867 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1868 int error; 1869 1870 PUFFS_MSG_ALLOC(vn, remove); 1871 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1872 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1873 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1874 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1875 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1876 1877 puffs_msg_enqueue(pmp, park_remove); 1878 vref(dvp); /* hang onto caller's reference at end */ 1879 REFPN(dpn); 1880 if (dvp == vp) 1881 REFPN(pn); 1882 else 1883 REFPN_AND_UNLOCKVP(vp, pn); 1884 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1885 1886 PUFFS_MSG_RELEASE(remove); 1887 1888 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 1889 1890 RELEPN_AND_VP(dvp, dpn); 1891 RELEPN_AND_VP(vp, pn); 1892 1893 error = checkerr(pmp, error, __func__); 1894 return error; 1895 } 1896 1897 int 1898 puffs_vnop_mkdir(void *v) 1899 { 1900 struct vop_mkdir_v3_args /* { 1901 const struct vnodeop_desc *a_desc; 1902 struct vnode *a_dvp; 1903 struct vnode **a_vpp; 1904 struct componentname *a_cnp; 1905 struct vattr *a_vap; 1906 } */ *ap = v; 1907 PUFFS_MSG_VARS(vn, mkdir); 1908 struct vnode *dvp = ap->a_dvp; 1909 struct puffs_node *dpn = VPTOPP(dvp); 1910 struct componentname *cnp = ap->a_cnp; 1911 struct mount *mp = dvp->v_mount; 1912 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1913 int error; 1914 1915 PUFFS_MSG_ALLOC(vn, mkdir); 1916 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1917 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1918 mkdir_msg->pvnr_va = *ap->a_vap; 1919 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1920 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1921 1922 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1923 1924 error = checkerr(pmp, error, __func__); 1925 if (error) 1926 goto out; 1927 1928 error = puffs_newnode(mp, dvp, ap->a_vpp, 1929 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1930 if (error) { 1931 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1932 mkdir_msg->pvnr_newnode, cnp); 1933 goto out; 1934 } 1935 1936 if (PUFFS_USE_FS_TTL(pmp)) { 1937 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1938 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1939 struct vattr *rvap = &mkdir_msg->pvnr_va; 1940 1941 update_va(*ap->a_vpp, NULL, rvap, 1942 va_ttl, cn_ttl, SETATTR_CHSIZE); 1943 } 1944 1945 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1946 1947 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1948 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1949 update_parent(*ap->a_vpp, dvp); 1950 1951 out: 1952 PUFFS_MSG_RELEASE(mkdir); 1953 return error; 1954 } 1955 1956 static int 1957 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1958 struct componentname *cnp) 1959 { 1960 PUFFS_MSG_VARS(vn, rmdir); 1961 int error; 1962 1963 PUFFS_MSG_ALLOC(vn, rmdir); 1964 rmdir_msg->pvnr_cookie_targ = ck; 1965 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1966 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1967 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1968 1969 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1970 PUFFS_MSG_RELEASE(rmdir); 1971 1972 return checkerr(pmp, error, __func__); 1973 } 1974 1975 int 1976 puffs_vnop_rmdir(void *v) 1977 { 1978 struct vop_rmdir_v2_args /* { 1979 const struct vnodeop_desc *a_desc; 1980 struct vnode *a_dvp; 1981 struct vnode *a_vp; 1982 struct componentname *a_cnp; 1983 } */ *ap = v; 1984 PUFFS_MSG_VARS(vn, rmdir); 1985 struct vnode *dvp = ap->a_dvp; 1986 struct vnode *vp = ap->a_vp; 1987 struct puffs_node *dpn = VPTOPP(dvp); 1988 struct puffs_node *pn = VPTOPP(vp); 1989 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1990 struct componentname *cnp = ap->a_cnp; 1991 int error; 1992 1993 PUFFS_MSG_ALLOC(vn, rmdir); 1994 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1995 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1996 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1997 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1998 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1999 2000 puffs_msg_enqueue(pmp, park_rmdir); 2001 vref(dvp); /* hang onto caller's reference at end */ 2002 KASSERTMSG((dvp != vp), "rmdir ."); 2003 REFPN(dpn); 2004 REFPN_AND_UNLOCKVP(vp, pn); 2005 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 2006 2007 PUFFS_MSG_RELEASE(rmdir); 2008 2009 puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2010 2011 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 2012 RELEPN_AND_VP(dvp, dpn); 2013 RELEPN_AND_VP(vp, pn); 2014 2015 return error; 2016 } 2017 2018 int 2019 puffs_vnop_link(void *v) 2020 { 2021 struct vop_link_v2_args /* { 2022 const struct vnodeop_desc *a_desc; 2023 struct vnode *a_dvp; 2024 struct vnode *a_vp; 2025 struct componentname *a_cnp; 2026 } */ *ap = v; 2027 PUFFS_MSG_VARS(vn, link); 2028 struct vnode *dvp = ap->a_dvp; 2029 struct vnode *vp = ap->a_vp; 2030 struct puffs_node *dpn = VPTOPP(dvp); 2031 struct puffs_node *pn = VPTOPP(vp); 2032 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2033 struct componentname *cnp = ap->a_cnp; 2034 int error; 2035 2036 PUFFS_MSG_ALLOC(vn, link); 2037 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 2038 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 2039 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2040 puffs_msg_setinfo(park_link, PUFFSOP_VN, 2041 PUFFS_VN_LINK, VPTOPNC(dvp)); 2042 2043 puffs_msg_enqueue(pmp, park_link); 2044 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 2045 2046 PUFFS_MSG_RELEASE(link); 2047 2048 error = checkerr(pmp, error, __func__); 2049 2050 /* 2051 * XXX: stay in touch with the cache. I don't like this, but 2052 * don't have a better solution either. See also puffs_rename(). 2053 */ 2054 if (error == 0) { 2055 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 2056 puffs_updatenode(VPTOPP(dvp), 2057 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2058 } 2059 2060 return error; 2061 } 2062 2063 int 2064 puffs_vnop_symlink(void *v) 2065 { 2066 struct vop_symlink_v3_args /* { 2067 const struct vnodeop_desc *a_desc; 2068 struct vnode *a_dvp; 2069 struct vnode **a_vpp; 2070 struct componentname *a_cnp; 2071 struct vattr *a_vap; 2072 char *a_target; 2073 } */ *ap = v; 2074 PUFFS_MSG_VARS(vn, symlink); 2075 struct vnode *dvp = ap->a_dvp; 2076 struct puffs_node *dpn = VPTOPP(dvp); 2077 struct mount *mp = dvp->v_mount; 2078 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2079 struct componentname *cnp = ap->a_cnp; 2080 int error; 2081 2082 *ap->a_vpp = NULL; 2083 2084 PUFFS_MSG_ALLOC(vn, symlink); 2085 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2086 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2087 symlink_msg->pvnr_va = *ap->a_vap; 2088 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2089 sizeof(symlink_msg->pvnr_link)); 2090 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2091 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2092 2093 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2094 2095 error = checkerr(pmp, error, __func__); 2096 if (error) 2097 goto out; 2098 2099 error = puffs_newnode(mp, dvp, ap->a_vpp, 2100 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2101 if (error) { 2102 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2103 symlink_msg->pvnr_newnode, cnp); 2104 goto out; 2105 } 2106 2107 if (PUFFS_USE_FS_TTL(pmp)) { 2108 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2109 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2110 struct vattr *rvap = &symlink_msg->pvnr_va; 2111 2112 update_va(*ap->a_vpp, NULL, rvap, 2113 va_ttl, cn_ttl, SETATTR_CHSIZE); 2114 } 2115 2116 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2117 2118 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2119 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2120 update_parent(*ap->a_vpp, dvp); 2121 2122 out: 2123 PUFFS_MSG_RELEASE(symlink); 2124 2125 return error; 2126 } 2127 2128 int 2129 puffs_vnop_readlink(void *v) 2130 { 2131 struct vop_readlink_args /* { 2132 const struct vnodeop_desc *a_desc; 2133 struct vnode *a_vp; 2134 struct uio *a_uio; 2135 kauth_cred_t a_cred; 2136 } */ *ap = v; 2137 PUFFS_MSG_VARS(vn, readlink); 2138 struct vnode *vp = ap->a_vp; 2139 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2140 size_t linklen; 2141 int error; 2142 2143 PUFFS_MSG_ALLOC(vn, readlink); 2144 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2145 linklen = sizeof(readlink_msg->pvnr_link); 2146 readlink_msg->pvnr_linklen = linklen; 2147 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2148 PUFFS_VN_READLINK, VPTOPNC(vp)); 2149 2150 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2151 error = checkerr(pmp, error, __func__); 2152 if (error) 2153 goto out; 2154 2155 /* bad bad user file server */ 2156 if (readlink_msg->pvnr_linklen > linklen) { 2157 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2158 "linklen too big", VPTOPNC(ap->a_vp)); 2159 error = EPROTO; 2160 goto out; 2161 } 2162 2163 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2164 ap->a_uio); 2165 out: 2166 PUFFS_MSG_RELEASE(readlink); 2167 return error; 2168 } 2169 2170 int 2171 puffs_vnop_rename(void *v) 2172 { 2173 struct vop_rename_args /* { 2174 const struct vnodeop_desc *a_desc; 2175 struct vnode *a_fdvp; 2176 struct vnode *a_fvp; 2177 struct componentname *a_fcnp; 2178 struct vnode *a_tdvp; 2179 struct vnode *a_tvp; 2180 struct componentname *a_tcnp; 2181 } */ *ap = v; 2182 PUFFS_MSG_VARS(vn, rename); 2183 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2184 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2185 struct puffs_node *fpn = ap->a_fvp->v_data; 2186 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2187 int error; 2188 bool doabort = true; 2189 2190 if ((fvp->v_mount != tdvp->v_mount) || 2191 (tvp && (fvp->v_mount != tvp->v_mount))) { 2192 ERROUT(EXDEV); 2193 } 2194 2195 PUFFS_MSG_ALLOC(vn, rename); 2196 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2197 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2198 if (tvp) 2199 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2200 else 2201 rename_msg->pvnr_cookie_targ = NULL; 2202 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2203 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2204 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2205 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2206 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2207 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2208 2209 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2210 doabort = false; 2211 PUFFS_MSG_RELEASE(rename); 2212 error = checkerr(pmp, error, __func__); 2213 2214 /* 2215 * XXX: stay in touch with the cache. I don't like this, but 2216 * don't have a better solution either. See also puffs_link(). 2217 */ 2218 if (error == 0) { 2219 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2220 puffs_updatenode(VPTOPP(fdvp), 2221 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); 2222 if (fdvp != tdvp) 2223 puffs_updatenode(VPTOPP(tdvp), 2224 PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 2225 0); 2226 2227 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2228 (VPTOPP(fvp)->pn_parent != tdvp)) 2229 update_parent(fvp, tdvp); 2230 } 2231 2232 2233 out: 2234 if (doabort) 2235 VOP_ABORTOP(tdvp, ap->a_tcnp); 2236 if (tvp != NULL) 2237 vput(tvp); 2238 if (tdvp == tvp) 2239 vrele(tdvp); 2240 else 2241 vput(tdvp); 2242 2243 if (doabort) 2244 VOP_ABORTOP(fdvp, ap->a_fcnp); 2245 vrele(fdvp); 2246 vrele(fvp); 2247 2248 return error; 2249 } 2250 2251 #define RWARGS(cont, iofl, move, offset, creds) \ 2252 (cont)->pvnr_ioflag = (iofl); \ 2253 (cont)->pvnr_resid = (move); \ 2254 (cont)->pvnr_offset = (offset); \ 2255 puffs_credcvt(&(cont)->pvnr_cred, creds) 2256 2257 int 2258 puffs_vnop_read(void *v) 2259 { 2260 struct vop_read_args /* { 2261 const struct vnodeop_desc *a_desc; 2262 struct vnode *a_vp; 2263 struct uio *a_uio; 2264 int a_ioflag; 2265 kauth_cred_t a_cred; 2266 } */ *ap = v; 2267 PUFFS_MSG_VARS(vn, read); 2268 struct vnode *vp = ap->a_vp; 2269 struct puffs_node *pn = VPTOPP(vp); 2270 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2271 struct uio *uio = ap->a_uio; 2272 size_t tomove, argsize; 2273 vsize_t bytelen; 2274 int error; 2275 2276 read_msg = NULL; 2277 error = 0; 2278 2279 /* std sanity */ 2280 if (uio->uio_resid == 0) 2281 return 0; 2282 if (uio->uio_offset < 0) 2283 return EFBIG; 2284 2285 /* 2286 * On the case of reading empty files and (vp->v_size != 0) below: 2287 * some filesystems (hint: FUSE and distributed filesystems) still 2288 * expect to get the READ in order to update atime. Reading through 2289 * the case filters empty files, therefore we prefer to bypass the 2290 * cache here. 2291 */ 2292 if (vp->v_type == VREG && 2293 PUFFS_USE_PAGECACHE(pmp) && 2294 !(pn->pn_stat & PNODE_RDIRECT) && 2295 (vp->v_size != 0)) { 2296 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2297 2298 while (uio->uio_resid > 0) { 2299 if (vp->v_size <= uio->uio_offset) { 2300 break; 2301 } 2302 bytelen = MIN(uio->uio_resid, 2303 vp->v_size - uio->uio_offset); 2304 if (bytelen == 0) 2305 break; 2306 2307 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2308 UBC_READ | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp)); 2309 if (error) 2310 break; 2311 } 2312 2313 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2314 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2315 } else { 2316 /* 2317 * in case it's not a regular file or we're operating 2318 * uncached, do read in the old-fashioned style, 2319 * i.e. explicit read operations 2320 */ 2321 2322 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2323 argsize = sizeof(struct puffs_vnmsg_read); 2324 puffs_msgmem_alloc(argsize + tomove, &park_read, 2325 (void *)&read_msg, 1); 2326 2327 error = 0; 2328 while (uio->uio_resid > 0) { 2329 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2330 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2331 RWARGS(read_msg, ap->a_ioflag, tomove, 2332 uio->uio_offset, ap->a_cred); 2333 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2334 PUFFS_VN_READ, VPTOPNC(vp)); 2335 puffs_msg_setdelta(park_read, tomove); 2336 2337 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2338 NULL, error); 2339 error = checkerr(pmp, error, __func__); 2340 if (error) 2341 break; 2342 2343 if (read_msg->pvnr_resid > tomove) { 2344 puffs_senderr(pmp, PUFFS_ERR_READ, 2345 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2346 error = EPROTO; 2347 break; 2348 } 2349 2350 error = uiomove(read_msg->pvnr_data, 2351 tomove - read_msg->pvnr_resid, uio); 2352 2353 /* 2354 * in case the file is out of juice, resid from 2355 * userspace is != 0. and the error-case is 2356 * quite obvious 2357 */ 2358 if (error || read_msg->pvnr_resid) 2359 break; 2360 } 2361 2362 puffs_msgmem_release(park_read); 2363 } 2364 2365 return error; 2366 } 2367 2368 /* 2369 * XXX: in case of a failure, this leaves uio in a bad state. 2370 * We could theoretically copy the uio and iovecs and "replay" 2371 * them the right amount after the userspace trip, but don't 2372 * bother for now. 2373 */ 2374 int 2375 puffs_vnop_write(void *v) 2376 { 2377 struct vop_write_args /* { 2378 const struct vnodeop_desc *a_desc; 2379 struct vnode *a_vp; 2380 struct uio *a_uio; 2381 int a_ioflag; 2382 kauth_cred_t a_cred; 2383 } */ *ap = v; 2384 PUFFS_MSG_VARS(vn, write); 2385 struct vnode *vp = ap->a_vp; 2386 struct puffs_node *pn = VPTOPP(vp); 2387 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2388 struct uio *uio = ap->a_uio; 2389 size_t tomove, argsize; 2390 off_t oldoff, newoff, origoff; 2391 vsize_t bytelen; 2392 int error, uflags; 2393 int ubcflags; 2394 2395 error = uflags = 0; 2396 write_msg = NULL; 2397 2398 /* std sanity */ 2399 if (uio->uio_resid == 0) 2400 return 0; 2401 if (uio->uio_offset < 0) 2402 return EFBIG; 2403 2404 mutex_enter(&pn->pn_sizemtx); 2405 2406 /* 2407 * userspace *should* be allowed to control this, 2408 * but with UBC it's a bit unclear how to handle it 2409 */ 2410 if (ap->a_ioflag & IO_APPEND) 2411 uio->uio_offset = vp->v_size; 2412 2413 origoff = uio->uio_offset; 2414 2415 if (vp->v_type == VREG && 2416 PUFFS_USE_PAGECACHE(pmp) && 2417 !(pn->pn_stat & PNODE_WDIRECT)) { 2418 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_VNODE_FLAGS(vp); 2419 2420 while (uio->uio_resid > 0) { 2421 oldoff = uio->uio_offset; 2422 bytelen = uio->uio_resid; 2423 2424 newoff = oldoff + bytelen; 2425 if (vp->v_size < newoff) { 2426 uvm_vnp_setwritesize(vp, newoff); 2427 } 2428 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2429 UVM_ADV_RANDOM, ubcflags); 2430 2431 /* 2432 * In case of a ubc_uiomove() error, 2433 * opt to not extend the file at all and 2434 * return an error. Otherwise, if we attempt 2435 * to clear the memory we couldn't fault to, 2436 * we might generate a kernel page fault. 2437 */ 2438 if (vp->v_size < newoff) { 2439 if (error == 0) { 2440 uflags |= PUFFS_UPDATESIZE; 2441 uvm_vnp_setsize(vp, newoff); 2442 } else { 2443 uvm_vnp_setwritesize(vp, vp->v_size); 2444 } 2445 } 2446 if (error) 2447 break; 2448 2449 /* 2450 * If we're writing large files, flush to file server 2451 * every 64k. Otherwise we can very easily exhaust 2452 * kernel and user memory, as the file server cannot 2453 * really keep up with our writing speed. 2454 * 2455 * Note: this does *NOT* honor MNT_ASYNC, because 2456 * that gives userland too much say in the kernel. 2457 */ 2458 if (oldoff >> 16 != uio->uio_offset >> 16) { 2459 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 2460 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2461 uio->uio_offset & ~0xffff, 2462 PGO_CLEANIT | PGO_SYNCIO); 2463 if (error) 2464 break; 2465 } 2466 } 2467 2468 /* synchronous I/O? */ 2469 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2470 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 2471 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2472 round_page(uio->uio_offset), 2473 PGO_CLEANIT | PGO_SYNCIO); 2474 2475 /* write through page cache? */ 2476 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2477 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 2478 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2479 round_page(uio->uio_offset), PGO_CLEANIT); 2480 } 2481 } else { 2482 /* tomove is non-increasing */ 2483 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2484 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2485 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2486 2487 while (uio->uio_resid > 0) { 2488 /* move data to buffer */ 2489 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2490 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2491 RWARGS(write_msg, ap->a_ioflag, tomove, 2492 uio->uio_offset, ap->a_cred); 2493 error = uiomove(write_msg->pvnr_data, tomove, uio); 2494 if (error) 2495 break; 2496 2497 /* move buffer to userspace */ 2498 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2499 PUFFS_VN_WRITE, VPTOPNC(vp)); 2500 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2501 NULL, error); 2502 error = checkerr(pmp, error, __func__); 2503 if (error) 2504 break; 2505 2506 if (write_msg->pvnr_resid > tomove) { 2507 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2508 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2509 error = EPROTO; 2510 break; 2511 } 2512 2513 /* adjust file size */ 2514 if (vp->v_size < uio->uio_offset) { 2515 uflags |= PUFFS_UPDATESIZE; 2516 uvm_vnp_setsize(vp, uio->uio_offset); 2517 } 2518 2519 /* didn't move everything? bad userspace. bail */ 2520 if (write_msg->pvnr_resid != 0) { 2521 error = EIO; 2522 break; 2523 } 2524 } 2525 puffs_msgmem_release(park_write); 2526 2527 /* 2528 * Direct I/O on write but not on read: we must 2529 * invlidate the written pages so that we read 2530 * the written data and not the stalled cache. 2531 */ 2532 if ((error == 0) && 2533 (vp->v_type == VREG) && PUFFS_USE_PAGECACHE(pmp) && 2534 (pn->pn_stat & PNODE_WDIRECT) && 2535 !(pn->pn_stat & PNODE_RDIRECT)) { 2536 voff_t off_lo = trunc_page(origoff); 2537 voff_t off_hi = round_page(uio->uio_offset); 2538 2539 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 2540 error = VOP_PUTPAGES(vp, off_lo, off_hi, PGO_FREE); 2541 } 2542 } 2543 2544 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2545 uflags |= PUFFS_UPDATEATIME; 2546 uflags |= PUFFS_UPDATECTIME; 2547 uflags |= PUFFS_UPDATEMTIME; 2548 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2549 2550 /* 2551 * If we do not use meta flush, we need to update the 2552 * filesystem now, otherwise we will get a stale value 2553 * on the next GETATTR 2554 */ 2555 if (!PUFFS_USE_METAFLUSH(pmp) && (uflags & PUFFS_UPDATESIZE)) { 2556 struct vattr va; 2557 int ret; 2558 2559 vattr_null(&va); 2560 va.va_size = vp->v_size; 2561 ret = dosetattr(vp, &va, FSCRED, 0); 2562 if (ret) { 2563 DPRINTF(("dosetattr set size to %jd failed: %d\n", 2564 (intmax_t)vp->v_size, ret)); 2565 } 2566 } 2567 mutex_exit(&pn->pn_sizemtx); 2568 return error; 2569 } 2570 2571 int 2572 puffs_vnop_fallocate(void *v) 2573 { 2574 struct vop_fallocate_args /* { 2575 const struct vnodeop_desc *a_desc; 2576 struct vnode *a_vp; 2577 off_t a_pos; 2578 off_t a_len; 2579 } */ *ap = v; 2580 struct vnode *vp = ap->a_vp; 2581 struct puffs_node *pn = VPTOPP(vp); 2582 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2583 PUFFS_MSG_VARS(vn, fallocate); 2584 int error; 2585 2586 mutex_enter(&pn->pn_sizemtx); 2587 2588 PUFFS_MSG_ALLOC(vn, fallocate); 2589 fallocate_msg->pvnr_off = ap->a_pos; 2590 fallocate_msg->pvnr_len = ap->a_len; 2591 puffs_msg_setinfo(park_fallocate, PUFFSOP_VN, 2592 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2593 2594 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fallocate, vp->v_data, NULL, error); 2595 error = checkerr(pmp, error, __func__); 2596 PUFFS_MSG_RELEASE(fallocate); 2597 2598 switch (error) { 2599 case 0: 2600 break; 2601 case EAGAIN: 2602 error = EIO; 2603 /* FALLTHROUGH */ 2604 default: 2605 goto out; 2606 } 2607 2608 if (ap->a_pos + ap->a_len > vp->v_size) { 2609 uvm_vnp_setsize(vp, ap->a_pos + ap->a_len); 2610 puffs_updatenode(pn, PUFFS_UPDATESIZE, vp->v_size); 2611 } 2612 out: 2613 mutex_exit(&pn->pn_sizemtx); 2614 2615 return error; 2616 } 2617 2618 int 2619 puffs_vnop_fdiscard(void *v) 2620 { 2621 struct vop_fdiscard_args /* { 2622 const struct vnodeop_desc *a_desc; 2623 struct vnode *a_vp; 2624 off_t a_pos; 2625 off_t a_len; 2626 } */ *ap = v; 2627 struct vnode *vp = ap->a_vp; 2628 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2629 PUFFS_MSG_VARS(vn, fdiscard); 2630 int error; 2631 2632 PUFFS_MSG_ALLOC(vn, fdiscard); 2633 fdiscard_msg->pvnr_off = ap->a_pos; 2634 fdiscard_msg->pvnr_len = ap->a_len; 2635 puffs_msg_setinfo(park_fdiscard, PUFFSOP_VN, 2636 PUFFS_VN_FALLOCATE, VPTOPNC(vp)); 2637 2638 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fdiscard, vp->v_data, NULL, error); 2639 error = checkerr(pmp, error, __func__); 2640 PUFFS_MSG_RELEASE(fdiscard); 2641 2642 return error; 2643 } 2644 2645 int 2646 puffs_vnop_print(void *v) 2647 { 2648 struct vop_print_args /* { 2649 struct vnode *a_vp; 2650 } */ *ap = v; 2651 PUFFS_MSG_VARS(vn, print); 2652 struct vnode *vp = ap->a_vp; 2653 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2654 struct puffs_node *pn = vp->v_data; 2655 2656 /* kernel portion */ 2657 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2658 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2659 if (vp->v_type == VFIFO) 2660 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2661 printf("\n"); 2662 2663 /* userspace portion */ 2664 if (EXISTSOP(pmp, PRINT)) { 2665 PUFFS_MSG_ALLOC(vn, print); 2666 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2667 PUFFS_VN_PRINT, VPTOPNC(vp)); 2668 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2669 NULL); 2670 PUFFS_MSG_RELEASE(print); 2671 } 2672 2673 return 0; 2674 } 2675 2676 int 2677 puffs_vnop_pathconf(void *v) 2678 { 2679 struct vop_pathconf_args /* { 2680 const struct vnodeop_desc *a_desc; 2681 struct vnode *a_vp; 2682 int a_name; 2683 register_t *a_retval; 2684 } */ *ap = v; 2685 PUFFS_MSG_VARS(vn, pathconf); 2686 struct vnode *vp = ap->a_vp; 2687 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2688 int error; 2689 2690 PUFFS_MSG_ALLOC(vn, pathconf); 2691 pathconf_msg->pvnr_name = ap->a_name; 2692 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2693 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2694 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2695 error = checkerr(pmp, error, __func__); 2696 if (!error) 2697 *ap->a_retval = pathconf_msg->pvnr_retval; 2698 PUFFS_MSG_RELEASE(pathconf); 2699 2700 return error; 2701 } 2702 2703 int 2704 puffs_vnop_advlock(void *v) 2705 { 2706 struct vop_advlock_args /* { 2707 const struct vnodeop_desc *a_desc; 2708 struct vnode *a_vp; 2709 void *a_id; 2710 int a_op; 2711 struct flock *a_fl; 2712 int a_flags; 2713 } */ *ap = v; 2714 PUFFS_MSG_VARS(vn, advlock); 2715 struct vnode *vp = ap->a_vp; 2716 struct puffs_node *pn = VPTOPP(vp); 2717 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2718 int error; 2719 2720 if (!EXISTSOP(pmp, ADVLOCK)) 2721 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2722 2723 PUFFS_MSG_ALLOC(vn, advlock); 2724 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2725 sizeof(advlock_msg->pvnr_fl)); 2726 advlock_msg->pvnr_id = ap->a_id; 2727 advlock_msg->pvnr_op = ap->a_op; 2728 advlock_msg->pvnr_flags = ap->a_flags; 2729 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2730 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2731 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2732 error = checkerr(pmp, error, __func__); 2733 PUFFS_MSG_RELEASE(advlock); 2734 2735 return error; 2736 } 2737 2738 int 2739 puffs_vnop_abortop(void *v) 2740 { 2741 struct vop_abortop_args /* { 2742 struct vnode *a_dvp; 2743 struct componentname *a_cnp; 2744 }; */ *ap = v; 2745 PUFFS_MSG_VARS(vn, abortop); 2746 struct vnode *dvp = ap->a_dvp; 2747 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2748 struct componentname *cnp = ap->a_cnp; 2749 2750 if (EXISTSOP(pmp, ABORTOP)) { 2751 PUFFS_MSG_ALLOC(vn, abortop); 2752 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2753 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2754 puffs_msg_setfaf(park_abortop); 2755 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2756 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2757 2758 puffs_msg_enqueue(pmp, park_abortop); 2759 PUFFS_MSG_RELEASE(abortop); 2760 } 2761 2762 return genfs_abortop(v); 2763 } 2764 2765 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2766 2767 /* 2768 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2769 */ 2770 int 2771 puffs_vnop_strategy(void *v) 2772 { 2773 struct vop_strategy_args /* { 2774 const struct vnodeop_desc *a_desc; 2775 struct vnode *a_vp; 2776 struct buf *a_bp; 2777 } */ *ap = v; 2778 PUFFS_MSG_VARS(vn, rw); 2779 struct vnode *vp = ap->a_vp; 2780 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2781 struct puffs_node *pn; 2782 struct buf *bp; 2783 size_t argsize; 2784 size_t tomove, moved; 2785 int error, dofaf, cansleep, dobiodone; 2786 2787 pmp = MPTOPUFFSMP(vp->v_mount); 2788 bp = ap->a_bp; 2789 error = 0; 2790 dofaf = 0; 2791 cansleep = 0; 2792 pn = VPTOPP(vp); 2793 park_rw = NULL; /* explicit */ 2794 dobiodone = 1; 2795 2796 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2797 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2798 ERROUT(EOPNOTSUPP); 2799 2800 /* 2801 * Short-circuit optimization: don't flush buffer in between 2802 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2803 */ 2804 if (pn->pn_stat & PNODE_DYING) { 2805 KASSERT(BUF_ISWRITE(bp)); 2806 bp->b_resid = 0; 2807 goto out; 2808 } 2809 2810 #ifdef DIAGNOSTIC 2811 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2812 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2813 bp->b_bcount); 2814 #endif 2815 2816 /* 2817 * See explanation for the necessity of a FAF in puffs_fsync. 2818 * 2819 * Also, do FAF in case we're suspending. 2820 * See puffs_vfsops.c:pageflush() 2821 */ 2822 if (BUF_ISWRITE(bp)) { 2823 mutex_enter(vp->v_interlock); 2824 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2825 dofaf = 1; 2826 if (pn->pn_stat & PNODE_FAF) 2827 dofaf = 1; 2828 mutex_exit(vp->v_interlock); 2829 } 2830 2831 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2832 2833 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2834 2835 /* allocate transport structure */ 2836 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2837 argsize = sizeof(struct puffs_vnmsg_rw); 2838 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2839 (void *)&rw_msg, cansleep); 2840 if (error) 2841 goto out; 2842 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2843 2844 /* 2x2 cases: read/write, faf/nofaf */ 2845 if (BUF_ISREAD(bp)) { 2846 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2847 PUFFS_VN_READ, VPTOPNC(vp)); 2848 puffs_msg_setdelta(park_rw, tomove); 2849 if (BIOASYNC(bp)) { 2850 puffs_msg_setcall(park_rw, 2851 puffs_parkdone_asyncbioread, bp); 2852 puffs_msg_enqueue(pmp, park_rw); 2853 dobiodone = 0; 2854 } else { 2855 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2856 NULL, error); 2857 error = checkerr(pmp, error, __func__); 2858 if (error) 2859 goto out; 2860 2861 if (rw_msg->pvnr_resid > tomove) { 2862 puffs_senderr(pmp, PUFFS_ERR_READ, 2863 E2BIG, "resid grew", VPTOPNC(vp)); 2864 ERROUT(EPROTO); 2865 } 2866 2867 moved = tomove - rw_msg->pvnr_resid; 2868 2869 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2870 bp->b_resid = bp->b_bcount - moved; 2871 } 2872 } else { 2873 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2874 PUFFS_VN_WRITE, VPTOPNC(vp)); 2875 /* 2876 * make pages read-only before we write them if we want 2877 * write caching info 2878 */ 2879 if (PUFFS_WCACHEINFO(pmp)) { 2880 struct uvm_object *uobj = &vp->v_uobj; 2881 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2882 struct vm_page *vmp; 2883 int i; 2884 2885 for (i = 0; i < npages; i++) { 2886 vmp= uvm_pageratop((vaddr_t)bp->b_data 2887 + (i << PAGE_SHIFT)); 2888 DPRINTF(("puffs_strategy: write-protecting " 2889 "vp %p page %p, offset %" PRId64"\n", 2890 vp, vmp, vmp->offset)); 2891 rw_enter(uobj->vmobjlock, RW_WRITER); 2892 vmp->flags |= PG_RDONLY; 2893 pmap_page_protect(vmp, VM_PROT_READ); 2894 rw_exit(uobj->vmobjlock); 2895 } 2896 } 2897 2898 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2899 if (dofaf) { 2900 puffs_msg_setfaf(park_rw); 2901 } else if (BIOASYNC(bp)) { 2902 puffs_msg_setcall(park_rw, 2903 puffs_parkdone_asyncbiowrite, bp); 2904 dobiodone = 0; 2905 } 2906 2907 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2908 2909 if (dobiodone == 0) 2910 goto out; 2911 2912 error = checkerr(pmp, error, __func__); 2913 if (error) 2914 goto out; 2915 2916 if (rw_msg->pvnr_resid > tomove) { 2917 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2918 E2BIG, "resid grew", VPTOPNC(vp)); 2919 ERROUT(EPROTO); 2920 } 2921 2922 /* 2923 * FAF moved everything. Frankly, we don't 2924 * really have a choice. 2925 */ 2926 if (dofaf && error == 0) 2927 moved = tomove; 2928 else 2929 moved = tomove - rw_msg->pvnr_resid; 2930 2931 bp->b_resid = bp->b_bcount - moved; 2932 if (bp->b_resid != 0) { 2933 ERROUT(EIO); 2934 } 2935 } 2936 2937 out: 2938 if (park_rw) 2939 puffs_msgmem_release(park_rw); 2940 2941 if (error) 2942 bp->b_error = error; 2943 2944 if (error || dobiodone) 2945 biodone(bp); 2946 2947 return error; 2948 } 2949 2950 int 2951 puffs_vnop_mmap(void *v) 2952 { 2953 struct vop_mmap_args /* { 2954 const struct vnodeop_desc *a_desc; 2955 struct vnode *a_vp; 2956 vm_prot_t a_prot; 2957 kauth_cred_t a_cred; 2958 } */ *ap = v; 2959 PUFFS_MSG_VARS(vn, mmap); 2960 struct vnode *vp = ap->a_vp; 2961 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2962 int error; 2963 2964 if (!PUFFS_USE_PAGECACHE(pmp)) 2965 return genfs_eopnotsupp(v); 2966 2967 if (EXISTSOP(pmp, MMAP)) { 2968 PUFFS_MSG_ALLOC(vn, mmap); 2969 mmap_msg->pvnr_prot = ap->a_prot; 2970 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2971 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2972 PUFFS_VN_MMAP, VPTOPNC(vp)); 2973 2974 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2975 error = checkerr(pmp, error, __func__); 2976 PUFFS_MSG_RELEASE(mmap); 2977 } else { 2978 error = genfs_mmap(v); 2979 } 2980 2981 return error; 2982 } 2983 2984 2985 /* 2986 * The rest don't get a free trip to userspace and back, they 2987 * have to stay within the kernel. 2988 */ 2989 2990 /* 2991 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2992 * well, maybe somehow, somewhere, some day .... 2993 */ 2994 int 2995 puffs_vnop_bmap(void *v) 2996 { 2997 struct vop_bmap_args /* { 2998 const struct vnodeop_desc *a_desc; 2999 struct vnode *a_vp; 3000 daddr_t a_bn; 3001 struct vnode **a_vpp; 3002 daddr_t *a_bnp; 3003 int *a_runp; 3004 } */ *ap = v; 3005 struct puffs_mount *pmp; 3006 3007 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 3008 3009 if (ap->a_vpp) 3010 *ap->a_vpp = ap->a_vp; 3011 if (ap->a_bnp) 3012 *ap->a_bnp = ap->a_bn; 3013 if (ap->a_runp) 3014 *ap->a_runp 3015 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 3016 3017 return 0; 3018 } 3019 3020 /* 3021 * Handle getpages faults in puffs. We let genfs_getpages() do most 3022 * of the dirty work, but we come in this route to do accounting tasks. 3023 * If the user server has specified functions for cache notifications 3024 * about reads and/or writes, we record which type of operation we got, 3025 * for which page range, and proceed to issue a FAF notification to the 3026 * server about it. 3027 */ 3028 int 3029 puffs_vnop_getpages(void *v) 3030 { 3031 struct vop_getpages_args /* { 3032 const struct vnodeop_desc *a_desc; 3033 struct vnode *a_vp; 3034 voff_t a_offset; 3035 struct vm_page **a_m; 3036 int *a_count; 3037 int a_centeridx; 3038 vm_prot_t a_access_type; 3039 int a_advice; 3040 int a_flags; 3041 } */ *ap = v; 3042 struct puffs_mount *pmp; 3043 struct puffs_node *pn; 3044 struct vnode *vp; 3045 struct vm_page **pgs; 3046 struct puffs_cacheinfo *pcinfo = NULL; 3047 struct puffs_cacherun *pcrun; 3048 void *parkmem = NULL; 3049 size_t runsizes; 3050 int i, npages, si, streakon; 3051 int error, locked, write; 3052 3053 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 3054 npages = *ap->a_count; 3055 pgs = ap->a_m; 3056 vp = ap->a_vp; 3057 pn = vp->v_data; 3058 locked = (ap->a_flags & PGO_LOCKED) != 0; 3059 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 3060 3061 /* ccg xnaht - gets Wuninitialized wrong */ 3062 pcrun = NULL; 3063 runsizes = 0; 3064 3065 /* 3066 * Check that we aren't trying to fault in pages which our file 3067 * server doesn't know about. This happens if we extend a file by 3068 * skipping some pages and later try to fault in pages which 3069 * are between pn_serversize and vp_size. This check optimizes 3070 * away the common case where a file is being extended. 3071 */ 3072 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 3073 struct vattr va; 3074 3075 /* try again later when we can block */ 3076 if (locked) 3077 ERROUT(EBUSY); 3078 3079 rw_exit(vp->v_uobj.vmobjlock); 3080 vattr_null(&va); 3081 va.va_size = vp->v_size; 3082 error = dosetattr(vp, &va, FSCRED, 0); 3083 if (error) 3084 ERROUT(error); 3085 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 3086 } 3087 3088 if (write && PUFFS_WCACHEINFO(pmp)) { 3089 #ifdef notnowjohn 3090 /* allocate worst-case memory */ 3091 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 3092 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 3093 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 3094 locked ? KM_NOSLEEP : KM_SLEEP); 3095 3096 /* 3097 * can't block if we're locked and can't mess up caching 3098 * information for fs server. so come back later, please 3099 */ 3100 if (pcinfo == NULL) 3101 ERROUT(ENOMEM); 3102 3103 parkmem = puffs_park_alloc(locked == 0); 3104 if (parkmem == NULL) 3105 ERROUT(ENOMEM); 3106 3107 pcrun = pcinfo->pcache_runs; 3108 #else 3109 (void)parkmem; 3110 #endif 3111 } 3112 3113 error = genfs_getpages(v); 3114 if (error) 3115 goto out; 3116 3117 if (PUFFS_WCACHEINFO(pmp) == 0) 3118 goto out; 3119 3120 /* 3121 * Let's see whose fault it was and inform the user server of 3122 * possibly read/written pages. Map pages from read faults 3123 * strictly read-only, since otherwise we might miss info on 3124 * when the page is actually write-faulted to. 3125 */ 3126 if (!locked) 3127 rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); 3128 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 3129 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 3130 if (streakon && write) { 3131 streakon = 0; 3132 pcrun[si].pcache_runend 3133 = trunc_page(pgs[i]->offset) + PAGE_MASK; 3134 si++; 3135 } 3136 continue; 3137 } 3138 if (streakon == 0 && write) { 3139 streakon = 1; 3140 pcrun[si].pcache_runstart = pgs[i]->offset; 3141 } 3142 3143 if (!write) 3144 pgs[i]->flags |= PG_RDONLY; 3145 } 3146 /* was the last page part of our streak? */ 3147 if (streakon) { 3148 pcrun[si].pcache_runend 3149 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 3150 si++; 3151 } 3152 if (!locked) 3153 rw_exit(vp->v_uobj.vmobjlock); 3154 3155 KASSERT(si <= (npages / 2) + 1); 3156 3157 #ifdef notnowjohn 3158 /* send results to userspace */ 3159 if (write) 3160 puffs_cacheop(pmp, parkmem, pcinfo, 3161 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 3162 #endif 3163 3164 out: 3165 if (error) { 3166 if (pcinfo != NULL) 3167 kmem_free(pcinfo, 3168 sizeof(struct puffs_cacheinfo) + runsizes); 3169 #ifdef notnowjohn 3170 if (parkmem != NULL) 3171 puffs_park_release(parkmem, 1); 3172 #endif 3173 } 3174 3175 return error; 3176 } 3177 3178 /* 3179 * Extended attribute support. 3180 */ 3181 3182 int 3183 puffs_vnop_getextattr(void *v) 3184 { 3185 struct vop_getextattr_args /* 3186 struct vnode *a_vp; 3187 int a_attrnamespace; 3188 const char *a_name; 3189 struct uio *a_uio; 3190 size_t *a_size; 3191 kauth_cred_t a_cred; 3192 }; */ *ap = v; 3193 PUFFS_MSG_VARS(vn, getextattr); 3194 struct vnode *vp = ap->a_vp; 3195 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3196 int attrnamespace = ap->a_attrnamespace; 3197 const char *name = ap->a_name; 3198 struct uio *uio = ap->a_uio; 3199 size_t *sizep = ap->a_size; 3200 size_t tomove, resid; 3201 int error; 3202 3203 if (uio) 3204 resid = uio->uio_resid; 3205 else 3206 resid = 0; 3207 3208 tomove = PUFFS_TOMOVE(resid, pmp); 3209 if (tomove != resid) { 3210 error = E2BIG; 3211 goto out; 3212 } 3213 3214 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3215 &park_getextattr, (void *)&getextattr_msg, 1); 3216 3217 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3218 strlcpy(getextattr_msg->pvnr_attrname, name, 3219 sizeof(getextattr_msg->pvnr_attrname)); 3220 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3221 if (sizep) 3222 getextattr_msg->pvnr_datasize = 1; 3223 getextattr_msg->pvnr_resid = tomove; 3224 3225 puffs_msg_setinfo(park_getextattr, 3226 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3227 puffs_msg_setdelta(park_getextattr, tomove); 3228 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3229 3230 error = checkerr(pmp, error, __func__); 3231 if (error) 3232 goto out; 3233 3234 resid = getextattr_msg->pvnr_resid; 3235 if (resid > tomove) { 3236 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3237 "resid grew", VPTOPNC(vp)); 3238 error = EPROTO; 3239 goto out; 3240 } 3241 3242 if (sizep) 3243 *sizep = getextattr_msg->pvnr_datasize; 3244 if (uio) 3245 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3246 3247 out: 3248 PUFFS_MSG_RELEASE(getextattr); 3249 return error; 3250 } 3251 3252 int 3253 puffs_vnop_setextattr(void *v) 3254 { 3255 struct vop_setextattr_args /* { 3256 struct vnode *a_vp; 3257 int a_attrnamespace; 3258 const char *a_name; 3259 struct uio *a_uio; 3260 kauth_cred_t a_cred; 3261 }; */ *ap = v; 3262 PUFFS_MSG_VARS(vn, setextattr); 3263 struct vnode *vp = ap->a_vp; 3264 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3265 int attrnamespace = ap->a_attrnamespace; 3266 const char *name = ap->a_name; 3267 struct uio *uio = ap->a_uio; 3268 size_t tomove, resid; 3269 int error; 3270 3271 if (uio) 3272 resid = uio->uio_resid; 3273 else 3274 resid = 0; 3275 3276 tomove = PUFFS_TOMOVE(resid, pmp); 3277 if (tomove != resid) { 3278 error = E2BIG; 3279 goto out; 3280 } 3281 3282 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3283 &park_setextattr, (void *)&setextattr_msg, 1); 3284 3285 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3286 strlcpy(setextattr_msg->pvnr_attrname, name, 3287 sizeof(setextattr_msg->pvnr_attrname)); 3288 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3289 setextattr_msg->pvnr_resid = tomove; 3290 3291 if (uio) { 3292 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3293 if (error) 3294 goto out; 3295 } 3296 3297 puffs_msg_setinfo(park_setextattr, 3298 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3299 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3300 3301 error = checkerr(pmp, error, __func__); 3302 if (error) 3303 goto out; 3304 3305 if (setextattr_msg->pvnr_resid != 0) 3306 error = EIO; 3307 3308 out: 3309 PUFFS_MSG_RELEASE(setextattr); 3310 3311 return error; 3312 } 3313 3314 int 3315 puffs_vnop_listextattr(void *v) 3316 { 3317 struct vop_listextattr_args /* { 3318 struct vnode *a_vp; 3319 int a_attrnamespace; 3320 struct uio *a_uio; 3321 size_t *a_size; 3322 int a_flag, 3323 kauth_cred_t a_cred; 3324 }; */ *ap = v; 3325 PUFFS_MSG_VARS(vn, listextattr); 3326 struct vnode *vp = ap->a_vp; 3327 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3328 int attrnamespace = ap->a_attrnamespace; 3329 struct uio *uio = ap->a_uio; 3330 size_t *sizep = ap->a_size; 3331 int flag = ap->a_flag; 3332 size_t tomove, resid; 3333 int error; 3334 3335 if (uio) 3336 resid = uio->uio_resid; 3337 else 3338 resid = 0; 3339 3340 tomove = PUFFS_TOMOVE(resid, pmp); 3341 if (tomove != resid) { 3342 error = E2BIG; 3343 goto out; 3344 } 3345 3346 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3347 &park_listextattr, (void *)&listextattr_msg, 1); 3348 3349 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3350 listextattr_msg->pvnr_flag = flag; 3351 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3352 listextattr_msg->pvnr_resid = tomove; 3353 if (sizep) 3354 listextattr_msg->pvnr_datasize = 1; 3355 3356 puffs_msg_setinfo(park_listextattr, 3357 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3358 puffs_msg_setdelta(park_listextattr, tomove); 3359 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3360 3361 error = checkerr(pmp, error, __func__); 3362 if (error) 3363 goto out; 3364 3365 resid = listextattr_msg->pvnr_resid; 3366 if (resid > tomove) { 3367 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3368 "resid grew", VPTOPNC(vp)); 3369 error = EPROTO; 3370 goto out; 3371 } 3372 3373 if (sizep) 3374 *sizep = listextattr_msg->pvnr_datasize; 3375 if (uio) 3376 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3377 3378 out: 3379 PUFFS_MSG_RELEASE(listextattr); 3380 return error; 3381 } 3382 3383 int 3384 puffs_vnop_deleteextattr(void *v) 3385 { 3386 struct vop_deleteextattr_args /* { 3387 struct vnode *a_vp; 3388 int a_attrnamespace; 3389 const char *a_name; 3390 kauth_cred_t a_cred; 3391 }; */ *ap = v; 3392 PUFFS_MSG_VARS(vn, deleteextattr); 3393 struct vnode *vp = ap->a_vp; 3394 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3395 int attrnamespace = ap->a_attrnamespace; 3396 const char *name = ap->a_name; 3397 int error; 3398 3399 PUFFS_MSG_ALLOC(vn, deleteextattr); 3400 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3401 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3402 sizeof(deleteextattr_msg->pvnr_attrname)); 3403 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3404 3405 puffs_msg_setinfo(park_deleteextattr, 3406 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3407 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3408 vp->v_data, NULL, error); 3409 3410 error = checkerr(pmp, error, __func__); 3411 3412 PUFFS_MSG_RELEASE(deleteextattr); 3413 return error; 3414 } 3415 3416 /* 3417 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3418 * FAF update information for the puffs node first. 3419 */ 3420 int 3421 puffs_vnop_spec_read(void *v) 3422 { 3423 struct vop_read_args /* { 3424 const struct vnodeop_desc *a_desc; 3425 struct vnode *a_vp; 3426 struct uio *a_uio; 3427 int a_ioflag; 3428 kauth_cred_t a_cred; 3429 } */ *ap = v; 3430 3431 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3432 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3433 } 3434 3435 int 3436 puffs_vnop_spec_write(void *v) 3437 { 3438 struct vop_write_args /* { 3439 const struct vnodeop_desc *a_desc; 3440 struct vnode *a_vp; 3441 struct uio *a_uio; 3442 int a_ioflag; 3443 kauth_cred_t a_cred; 3444 } */ *ap = v; 3445 3446 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3447 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3448 } 3449 3450 int 3451 puffs_vnop_fifo_read(void *v) 3452 { 3453 struct vop_read_args /* { 3454 const struct vnodeop_desc *a_desc; 3455 struct vnode *a_vp; 3456 struct uio *a_uio; 3457 int a_ioflag; 3458 kauth_cred_t a_cred; 3459 } */ *ap = v; 3460 3461 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3462 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3463 } 3464 3465 int 3466 puffs_vnop_fifo_write(void *v) 3467 { 3468 struct vop_write_args /* { 3469 const struct vnodeop_desc *a_desc; 3470 struct vnode *a_vp; 3471 struct uio *a_uio; 3472 int a_ioflag; 3473 kauth_cred_t a_cred; 3474 } */ *ap = v; 3475 3476 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3477 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3478 } 3479
Indexes created Tue Sep 30 20:09:53 GMT 2025