puffs_vnops.c revision 1.182
1 /* $NetBSD: puffs_vnops.c,v 1.182 2014/07/25 08:20:52 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 1.182 2014/07/25 08:20:52 dholland Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/lockf.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> /* For hz, hardclock_ticks */ 44 45 #include <uvm/uvm.h> 46 47 #include <fs/puffs/puffs_msgif.h> 48 #include <fs/puffs/puffs_sys.h> 49 50 #include <miscfs/fifofs/fifo.h> 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/specfs/specdev.h> 53 54 int puffs_vnop_lookup(void *); 55 int puffs_vnop_create(void *); 56 int puffs_vnop_access(void *); 57 int puffs_vnop_mknod(void *); 58 int puffs_vnop_open(void *); 59 int puffs_vnop_close(void *); 60 int puffs_vnop_getattr(void *); 61 int puffs_vnop_setattr(void *); 62 int puffs_vnop_reclaim(void *); 63 int puffs_vnop_readdir(void *); 64 int puffs_vnop_poll(void *); 65 int puffs_vnop_fsync(void *); 66 int puffs_vnop_seek(void *); 67 int puffs_vnop_remove(void *); 68 int puffs_vnop_mkdir(void *); 69 int puffs_vnop_rmdir(void *); 70 int puffs_vnop_link(void *); 71 int puffs_vnop_readlink(void *); 72 int puffs_vnop_symlink(void *); 73 int puffs_vnop_rename(void *); 74 int puffs_vnop_read(void *); 75 int puffs_vnop_write(void *); 76 int puffs_vnop_fcntl(void *); 77 int puffs_vnop_ioctl(void *); 78 int puffs_vnop_inactive(void *); 79 int puffs_vnop_print(void *); 80 int puffs_vnop_pathconf(void *); 81 int puffs_vnop_advlock(void *); 82 int puffs_vnop_strategy(void *); 83 int puffs_vnop_bmap(void *); 84 int puffs_vnop_mmap(void *); 85 int puffs_vnop_getpages(void *); 86 int puffs_vnop_abortop(void *); 87 int puffs_vnop_getextattr(void *); 88 int puffs_vnop_setextattr(void *); 89 int puffs_vnop_listextattr(void *); 90 int puffs_vnop_deleteextattr(void *); 91 92 int puffs_vnop_spec_read(void *); 93 int puffs_vnop_spec_write(void *); 94 int puffs_vnop_fifo_read(void *); 95 int puffs_vnop_fifo_write(void *); 96 97 int puffs_vnop_checkop(void *); 98 99 #define puffs_vnop_lock genfs_lock 100 #define puffs_vnop_unlock genfs_unlock 101 #define puffs_vnop_islocked genfs_islocked 102 103 int (**puffs_vnodeop_p)(void *); 104 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 107 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 108 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 109 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 110 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 111 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 112 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 113 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 114 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 115 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 116 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 117 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 118 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 119 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 120 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 121 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 122 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 123 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 124 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 125 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 126 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 127 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 128 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 129 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 130 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 131 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 132 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 133 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 134 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 135 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 136 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 137 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 138 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 139 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 140 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 141 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 142 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 143 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 144 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 145 { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ 146 { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ 147 { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ 148 { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ 149 #if 0 150 { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ 151 { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ 152 #endif 153 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 154 { NULL, NULL } 155 }; 156 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 157 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 158 159 160 int (**puffs_specop_p)(void *); 161 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 162 { &vop_default_desc, vn_default_error }, 163 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 164 { &vop_create_desc, spec_create }, /* genfs_badop */ 165 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 166 { &vop_open_desc, spec_open }, /* spec_open */ 167 { &vop_close_desc, spec_close }, /* spec_close */ 168 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 169 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 170 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 171 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 172 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 173 { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ 174 { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ 175 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 176 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 177 { &vop_poll_desc, spec_poll }, /* spec_poll */ 178 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 179 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 180 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 181 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 182 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 183 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 184 { &vop_link_desc, spec_link }, /* genfs_badop */ 185 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 186 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 187 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 188 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 189 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 190 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 191 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 192 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 193 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 194 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 195 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 196 { &vop_bmap_desc, spec_bmap }, /* dummy */ 197 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 198 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 199 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 200 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 201 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 202 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 203 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 204 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 205 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 206 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 207 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 208 { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ 209 #if 0 210 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 211 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 212 #endif 213 { NULL, NULL } 214 }; 215 const struct vnodeopv_desc puffs_specop_opv_desc = 216 { &puffs_specop_p, puffs_specop_entries }; 217 218 219 int (**puffs_fifoop_p)(void *); 220 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 221 { &vop_default_desc, vn_default_error }, 222 { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ 223 { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ 224 { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ 225 { &vop_open_desc, vn_fifo_bypass }, /* open */ 226 { &vop_close_desc, vn_fifo_bypass }, /* close */ 227 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 228 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 229 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 230 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 231 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 232 { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ 233 { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ 234 { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ 235 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 236 { &vop_poll_desc, vn_fifo_bypass }, /* poll */ 237 { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ 238 { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ 239 { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ 240 { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ 241 { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ 242 { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ 243 { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ 244 { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ 245 { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ 246 { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ 247 { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ 248 { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ 249 { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ 250 { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ 251 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 252 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 253 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 254 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 255 { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ 256 { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ 257 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 258 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 259 { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ 260 { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ 261 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 262 { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ 263 #if 0 264 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 265 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 266 #endif 267 { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ 268 { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ 269 { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ 270 { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ 271 { NULL, NULL } 272 }; 273 const struct vnodeopv_desc puffs_fifoop_opv_desc = 274 { &puffs_fifoop_p, puffs_fifoop_entries }; 275 276 277 /* "real" vnode operations */ 278 int (**puffs_msgop_p)(void *); 279 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 280 { &vop_default_desc, vn_default_error }, 281 { &vop_create_desc, puffs_vnop_create }, /* create */ 282 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 283 { &vop_open_desc, puffs_vnop_open }, /* open */ 284 { &vop_close_desc, puffs_vnop_close }, /* close */ 285 { &vop_access_desc, puffs_vnop_access }, /* access */ 286 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 287 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 288 { &vop_read_desc, puffs_vnop_read }, /* read */ 289 { &vop_write_desc, puffs_vnop_write }, /* write */ 290 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 291 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 292 { &vop_link_desc, puffs_vnop_link }, /* link */ 293 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 294 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 295 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 296 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 297 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 298 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 299 { &vop_print_desc, puffs_vnop_print }, /* print */ 300 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 301 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 302 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 303 { NULL, NULL } 304 }; 305 const struct vnodeopv_desc puffs_msgop_opv_desc = 306 { &puffs_msgop_p, puffs_msgop_entries }; 307 308 /* 309 * for dosetattr / update_va 310 */ 311 #define SETATTR_CHSIZE 0x01 312 #define SETATTR_ASYNC 0x02 313 314 #define ERROUT(err) \ 315 do { \ 316 error = err; \ 317 goto out; \ 318 } while (/*CONSTCOND*/0) 319 320 /* 321 * This is a generic vnode operation handler. It checks if the necessary 322 * operations for the called vnode operation are implemented by userspace 323 * and either returns a dummy return value or proceeds to call the real 324 * vnode operation from puffs_msgop_v. 325 * 326 * XXX: this should described elsewhere and autogenerated, the complexity 327 * of the vnode operations vectors and their interrelationships is also 328 * getting a bit out of hand. Another problem is that we need this same 329 * information in the fs server code, so keeping the two in sync manually 330 * is not a viable (long term) plan. 331 */ 332 333 /* not supported, handle locking protocol */ 334 #define CHECKOP_NOTSUPP(op) \ 335 case VOP_##op##_DESCOFFSET: \ 336 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 337 return genfs_eopnotsupp(v); \ 338 break 339 340 /* always succeed, no locking */ 341 #define CHECKOP_SUCCESS(op) \ 342 case VOP_##op##_DESCOFFSET: \ 343 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 344 return 0; \ 345 break 346 347 int 348 puffs_vnop_checkop(void *v) 349 { 350 struct vop_generic_args /* { 351 struct vnodeop_desc *a_desc; 352 spooky mystery contents; 353 } */ *ap = v; 354 struct vnodeop_desc *desc = ap->a_desc; 355 struct puffs_mount *pmp; 356 struct vnode *vp; 357 int offset, rv; 358 359 offset = ap->a_desc->vdesc_vp_offsets[0]; 360 #ifdef DIAGNOSTIC 361 if (offset == VDESC_NO_OFFSET) 362 panic("puffs_checkop: no vnode, why did you call me?"); 363 #endif 364 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 365 pmp = MPTOPUFFSMP(vp->v_mount); 366 367 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 368 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 369 370 if (!ALLOPS(pmp)) { 371 switch (desc->vdesc_offset) { 372 CHECKOP_NOTSUPP(CREATE); 373 CHECKOP_NOTSUPP(MKNOD); 374 CHECKOP_NOTSUPP(GETATTR); 375 CHECKOP_NOTSUPP(SETATTR); 376 CHECKOP_NOTSUPP(READ); 377 CHECKOP_NOTSUPP(WRITE); 378 CHECKOP_NOTSUPP(FCNTL); 379 CHECKOP_NOTSUPP(IOCTL); 380 CHECKOP_NOTSUPP(REMOVE); 381 CHECKOP_NOTSUPP(LINK); 382 CHECKOP_NOTSUPP(RENAME); 383 CHECKOP_NOTSUPP(MKDIR); 384 CHECKOP_NOTSUPP(RMDIR); 385 CHECKOP_NOTSUPP(SYMLINK); 386 CHECKOP_NOTSUPP(READDIR); 387 CHECKOP_NOTSUPP(READLINK); 388 CHECKOP_NOTSUPP(PRINT); 389 CHECKOP_NOTSUPP(PATHCONF); 390 CHECKOP_NOTSUPP(GETEXTATTR); 391 CHECKOP_NOTSUPP(SETEXTATTR); 392 CHECKOP_NOTSUPP(LISTEXTATTR); 393 CHECKOP_NOTSUPP(DELETEEXTATTR); 394 395 CHECKOP_SUCCESS(ACCESS); 396 CHECKOP_SUCCESS(CLOSE); 397 CHECKOP_SUCCESS(SEEK); 398 399 case VOP_GETPAGES_DESCOFFSET: 400 if (!EXISTSOP(pmp, READ)) 401 return genfs_eopnotsupp(v); 402 break; 403 404 default: 405 panic("puffs_checkop: unhandled vnop %d", 406 desc->vdesc_offset); 407 } 408 } 409 410 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 411 412 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 413 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 414 415 return rv; 416 } 417 418 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 419 struct componentname *); 420 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 421 struct componentname *); 422 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 423 static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); 424 static int flushvncache(struct vnode *, off_t, off_t, bool); 425 static void update_va(struct vnode *, struct vattr *, struct vattr *, 426 struct timespec *, struct timespec *, int); 427 static void update_parent(struct vnode *, struct vnode *); 428 429 430 #define PUFFS_ABORT_LOOKUP 1 431 #define PUFFS_ABORT_CREATE 2 432 #define PUFFS_ABORT_MKNOD 3 433 #define PUFFS_ABORT_MKDIR 4 434 #define PUFFS_ABORT_SYMLINK 5 435 436 /* 437 * Press the pani^Wabort button! Kernel resource allocation failed. 438 */ 439 static void 440 puffs_abortbutton(struct puffs_mount *pmp, int what, 441 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 442 { 443 444 switch (what) { 445 case PUFFS_ABORT_CREATE: 446 case PUFFS_ABORT_MKNOD: 447 case PUFFS_ABORT_SYMLINK: 448 callremove(pmp, dck, ck, cnp); 449 break; 450 case PUFFS_ABORT_MKDIR: 451 callrmdir(pmp, dck, ck, cnp); 452 break; 453 } 454 455 callinactive(pmp, ck, 0); 456 callreclaim(pmp, ck, 1); 457 } 458 459 /* 460 * Begin vnode operations. 461 * 462 * A word from the keymaster about locks: generally we don't want 463 * to use the vnode locks at all: it creates an ugly dependency between 464 * the userlandia file server and the kernel. But we'll play along with 465 * the kernel vnode locks for now. However, even currently we attempt 466 * to release locks as early as possible. This is possible for some 467 * operations which a) don't need a locked vnode after the userspace op 468 * and b) return with the vnode unlocked. Theoretically we could 469 * unlock-do op-lock for others and order the graph in userspace, but I 470 * don't want to think of the consequences for the time being. 471 */ 472 473 #define TTL_TO_TIMEOUT(ts) \ 474 (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) 475 #define TTL_VALID(ts) \ 476 ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) 477 #define TIMED_OUT(expire) \ 478 ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) 479 int 480 puffs_vnop_lookup(void *v) 481 { 482 struct vop_lookup_v2_args /* { 483 const struct vnodeop_desc *a_desc; 484 struct vnode *a_dvp; 485 struct vnode **a_vpp; 486 struct componentname *a_cnp; 487 } */ *ap = v; 488 PUFFS_MSG_VARS(vn, lookup); 489 struct puffs_mount *pmp; 490 struct componentname *cnp; 491 struct vnode *vp, *dvp, *cvp; 492 struct puffs_node *dpn, *cpn; 493 int isdot; 494 int error; 495 496 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 497 cnp = ap->a_cnp; 498 dvp = ap->a_dvp; 499 cvp = NULL; 500 cpn = NULL; 501 *ap->a_vpp = NULL; 502 503 /* r/o fs? we check create later to handle EEXIST */ 504 if ((cnp->cn_flags & ISLASTCN) 505 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 506 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 507 return EROFS; 508 509 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 510 511 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 512 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 513 514 /* 515 * If dotdot cache is enabled, add reference to .. and return. 516 */ 517 if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { 518 vp = VPTOPP(ap->a_dvp)->pn_parent; 519 vref(vp); 520 521 *ap->a_vpp = vp; 522 return 0; 523 } 524 525 /* 526 * Check if someone fed it into the cache 527 */ 528 if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { 529 int found, iswhiteout; 530 531 found = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 532 cnp->cn_nameiop, cnp->cn_flags, 533 &iswhiteout, ap->a_vpp); 534 if (iswhiteout) { 535 cnp->cn_flags |= ISWHITEOUT; 536 } 537 538 if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { 539 cvp = *ap->a_vpp; 540 cpn = VPTOPP(cvp); 541 542 if (TIMED_OUT(cpn->pn_cn_timeout)) { 543 cache_purge(cvp); 544 /* 545 * cached vnode (cvp) is still referenced 546 * so that we can reuse it upon a new 547 * successful lookup. 548 */ 549 *ap->a_vpp = NULL; 550 found = 0; 551 } 552 } 553 554 /* 555 * Do not use negative caching, since the filesystem 556 * provides no TTL for it. 557 */ 558 if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) 559 found = 0; 560 561 if (found) { 562 return *ap->a_vpp == NULLVP ? ENOENT : 0; 563 } 564 565 /* 566 * This is what would have been left in ERROR before 567 * the rearrangement of cache_lookup(). What with all 568 * the macros, I am not sure if this is a dead value 569 * below or not. 570 */ 571 error = -1; 572 } 573 574 if (isdot) { 575 /* deal with rename lookup semantics */ 576 if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) 577 return EISDIR; 578 579 vp = ap->a_dvp; 580 vref(vp); 581 *ap->a_vpp = vp; 582 return 0; 583 } 584 585 if (cvp != NULL) { 586 if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { 587 vrele(cvp); 588 cvp = NULL; 589 } else 590 mutex_enter(&cpn->pn_sizemtx); 591 } 592 593 PUFFS_MSG_ALLOC(vn, lookup); 594 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 595 cnp, PUFFS_USE_FULLPNBUF(pmp)); 596 597 if (cnp->cn_flags & ISDOTDOT) 598 VOP_UNLOCK(dvp); 599 600 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 601 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 602 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 603 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 604 605 /* 606 * In case of error, there is no new vnode to play with, so be 607 * happy with the NULL value given to vpp in the beginning. 608 * Also, check if this really was an error or the target was not 609 * present. Either treat it as a non-error for CREATE/RENAME or 610 * enter the component into the negative name cache (if desired). 611 */ 612 if (error) { 613 error = checkerr(pmp, error, __func__); 614 if (error == ENOENT) { 615 /* don't allow to create files on r/o fs */ 616 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 617 && cnp->cn_nameiop == CREATE) { 618 error = EROFS; 619 620 /* adjust values if we are creating */ 621 } else if ((cnp->cn_flags & ISLASTCN) 622 && (cnp->cn_nameiop == CREATE 623 || cnp->cn_nameiop == RENAME)) { 624 error = EJUSTRETURN; 625 626 /* save negative cache entry */ 627 } else { 628 if (PUFFS_USE_NAMECACHE(pmp) && 629 !PUFFS_USE_FS_TTL(pmp)) 630 cache_enter(dvp, NULL, cnp->cn_nameptr, 631 cnp->cn_namelen, cnp->cn_flags); 632 } 633 } 634 goto out; 635 } 636 637 /* 638 * Check that we don't get our parent node back, that would cause 639 * a pretty obvious deadlock. 640 */ 641 dpn = dvp->v_data; 642 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 643 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 644 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 645 error = EPROTO; 646 goto out; 647 } 648 649 /* 650 * Check if we looked up the cached vnode 651 */ 652 vp = NULL; 653 if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { 654 int grace; 655 656 /* 657 * Bump grace time of this node so that it does not get 658 * reclaimed too fast. We try to increase a bit more the 659 * lifetime of busiest * nodes - with some limits. 660 */ 661 grace = 10 * puffs_sopreq_expire_timeout; 662 cpn->pn_cn_grace = hardclock_ticks + grace; 663 vp = cvp; 664 } 665 666 /* 667 * No cached vnode available, or the cached vnode does not 668 * match the userland cookie anymore: is the node known? 669 */ 670 if (vp == NULL) { 671 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 672 1, 1, &vp); 673 } 674 675 if (error == PUFFS_NOSUCHCOOKIE) { 676 error = puffs_getvnode(dvp->v_mount, 677 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 678 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 679 if (error) { 680 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, 681 VPTOPNC(dvp), lookup_msg->pvnr_newnode, 682 ap->a_cnp); 683 goto out; 684 } 685 686 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 687 } else if (error) { 688 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 689 lookup_msg->pvnr_newnode, ap->a_cnp); 690 goto out; 691 } 692 693 /* 694 * Update cache and TTL 695 */ 696 if (PUFFS_USE_FS_TTL(pmp)) { 697 struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; 698 struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; 699 update_va(vp, NULL, &lookup_msg->pvnr_va, 700 va_ttl, cn_ttl, SETATTR_CHSIZE); 701 } 702 703 KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); 704 *ap->a_vpp = vp; 705 706 if (PUFFS_USE_NAMECACHE(pmp)) 707 cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, 708 cnp->cn_flags); 709 710 /* XXX */ 711 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 712 cnp->cn_flags &= ~REQUIREDIR; 713 if (lookup_msg->pvnr_cn.pkcn_consume) 714 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 715 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 716 717 VPTOPP(vp)->pn_nlookup++; 718 719 if (PUFFS_USE_DOTDOTCACHE(pmp) && 720 (VPTOPP(vp)->pn_parent != dvp)) 721 update_parent(vp, dvp); 722 723 out: 724 if (cvp != NULL) { 725 mutex_exit(&cpn->pn_sizemtx); 726 727 if (error || (cvp != vp)) 728 vput(cvp); 729 } 730 if (error == 0) 731 VOP_UNLOCK(*ap->a_vpp); 732 733 if (cnp->cn_flags & ISDOTDOT) 734 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 735 736 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 737 PUFFS_MSG_RELEASE(lookup); 738 return error; 739 } 740 741 #define REFPN_AND_UNLOCKVP(a, b) \ 742 do { \ 743 mutex_enter(&b->pn_mtx); \ 744 puffs_referencenode(b); \ 745 mutex_exit(&b->pn_mtx); \ 746 VOP_UNLOCK(a); \ 747 } while (/*CONSTCOND*/0) 748 749 #define REFPN(b) \ 750 do { \ 751 mutex_enter(&b->pn_mtx); \ 752 puffs_referencenode(b); \ 753 mutex_exit(&b->pn_mtx); \ 754 } while (/*CONSTCOND*/0) 755 756 #define RELEPN_AND_VP(a, b) \ 757 do { \ 758 puffs_releasenode(b); \ 759 vrele(a); \ 760 } while (/*CONSTCOND*/0) 761 762 int 763 puffs_vnop_create(void *v) 764 { 765 struct vop_create_v3_args /* { 766 const struct vnodeop_desc *a_desc; 767 struct vnode *a_dvp; 768 struct vnode **a_vpp; 769 struct componentname *a_cnp; 770 struct vattr *a_vap; 771 } */ *ap = v; 772 PUFFS_MSG_VARS(vn, create); 773 struct vnode *dvp = ap->a_dvp; 774 struct puffs_node *dpn = VPTOPP(dvp); 775 struct componentname *cnp = ap->a_cnp; 776 struct mount *mp = dvp->v_mount; 777 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 778 int error; 779 780 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 781 dvp, ap->a_cnp->cn_nameptr)); 782 783 PUFFS_MSG_ALLOC(vn, create); 784 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 785 cnp, PUFFS_USE_FULLPNBUF(pmp)); 786 create_msg->pvnr_va = *ap->a_vap; 787 puffs_msg_setinfo(park_create, PUFFSOP_VN, 788 PUFFS_VN_CREATE, VPTOPNC(dvp)); 789 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 790 791 error = checkerr(pmp, error, __func__); 792 if (error) 793 goto out; 794 795 error = puffs_newnode(mp, dvp, ap->a_vpp, 796 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 797 if (error) { 798 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 799 create_msg->pvnr_newnode, cnp); 800 goto out; 801 } 802 803 if (PUFFS_USE_FS_TTL(pmp)) { 804 struct timespec *va_ttl = &create_msg->pvnr_va_ttl; 805 struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; 806 struct vattr *rvap = &create_msg->pvnr_va; 807 808 update_va(*ap->a_vpp, NULL, rvap, 809 va_ttl, cn_ttl, SETATTR_CHSIZE); 810 } 811 812 VPTOPP(*ap->a_vpp)->pn_nlookup++; 813 814 if (PUFFS_USE_DOTDOTCACHE(pmp) && 815 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 816 update_parent(*ap->a_vpp, dvp); 817 818 out: 819 DPRINTF(("puffs_create: return %d\n", error)); 820 PUFFS_MSG_RELEASE(create); 821 return error; 822 } 823 824 int 825 puffs_vnop_mknod(void *v) 826 { 827 struct vop_mknod_v3_args /* { 828 const struct vnodeop_desc *a_desc; 829 struct vnode *a_dvp; 830 struct vnode **a_vpp; 831 struct componentname *a_cnp; 832 struct vattr *a_vap; 833 } */ *ap = v; 834 PUFFS_MSG_VARS(vn, mknod); 835 struct vnode *dvp = ap->a_dvp; 836 struct puffs_node *dpn = VPTOPP(dvp); 837 struct componentname *cnp = ap->a_cnp; 838 struct mount *mp = dvp->v_mount; 839 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 840 int error; 841 842 PUFFS_MSG_ALLOC(vn, mknod); 843 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 844 cnp, PUFFS_USE_FULLPNBUF(pmp)); 845 mknod_msg->pvnr_va = *ap->a_vap; 846 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 847 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 848 849 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 850 851 error = checkerr(pmp, error, __func__); 852 if (error) 853 goto out; 854 855 error = puffs_newnode(mp, dvp, ap->a_vpp, 856 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 857 ap->a_vap->va_rdev); 858 if (error) { 859 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 860 mknod_msg->pvnr_newnode, cnp); 861 goto out; 862 } 863 864 if (PUFFS_USE_FS_TTL(pmp)) { 865 struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; 866 struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; 867 struct vattr *rvap = &mknod_msg->pvnr_va; 868 869 update_va(*ap->a_vpp, NULL, rvap, 870 va_ttl, cn_ttl, SETATTR_CHSIZE); 871 } 872 873 VPTOPP(*ap->a_vpp)->pn_nlookup++; 874 875 if (PUFFS_USE_DOTDOTCACHE(pmp) && 876 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 877 update_parent(*ap->a_vpp, dvp); 878 879 out: 880 PUFFS_MSG_RELEASE(mknod); 881 return error; 882 } 883 884 int 885 puffs_vnop_open(void *v) 886 { 887 struct vop_open_args /* { 888 const struct vnodeop_desc *a_desc; 889 struct vnode *a_vp; 890 int a_mode; 891 kauth_cred_t a_cred; 892 } */ *ap = v; 893 PUFFS_MSG_VARS(vn, open); 894 struct vnode *vp = ap->a_vp; 895 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 896 int mode = ap->a_mode; 897 int error; 898 899 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 900 901 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 902 ERROUT(EROFS); 903 904 if (!EXISTSOP(pmp, OPEN)) 905 ERROUT(0); 906 907 PUFFS_MSG_ALLOC(vn, open); 908 open_msg->pvnr_mode = mode; 909 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 910 puffs_msg_setinfo(park_open, PUFFSOP_VN, 911 PUFFS_VN_OPEN, VPTOPNC(vp)); 912 913 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 914 error = checkerr(pmp, error, __func__); 915 916 out: 917 DPRINTF(("puffs_open: returning %d\n", error)); 918 PUFFS_MSG_RELEASE(open); 919 return error; 920 } 921 922 int 923 puffs_vnop_close(void *v) 924 { 925 struct vop_close_args /* { 926 const struct vnodeop_desc *a_desc; 927 struct vnode *a_vp; 928 int a_fflag; 929 kauth_cred_t a_cred; 930 } */ *ap = v; 931 PUFFS_MSG_VARS(vn, close); 932 struct vnode *vp = ap->a_vp; 933 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 934 935 PUFFS_MSG_ALLOC(vn, close); 936 puffs_msg_setfaf(park_close); 937 close_msg->pvnr_fflag = ap->a_fflag; 938 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 939 puffs_msg_setinfo(park_close, PUFFSOP_VN, 940 PUFFS_VN_CLOSE, VPTOPNC(vp)); 941 942 puffs_msg_enqueue(pmp, park_close); 943 PUFFS_MSG_RELEASE(close); 944 return 0; 945 } 946 947 int 948 puffs_vnop_access(void *v) 949 { 950 struct vop_access_args /* { 951 const struct vnodeop_desc *a_desc; 952 struct vnode *a_vp; 953 int a_mode; 954 kauth_cred_t a_cred; 955 } */ *ap = v; 956 PUFFS_MSG_VARS(vn, access); 957 struct vnode *vp = ap->a_vp; 958 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 959 int mode = ap->a_mode; 960 int error; 961 962 if (mode & VWRITE) { 963 switch (vp->v_type) { 964 case VDIR: 965 case VLNK: 966 case VREG: 967 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 968 || !EXISTSOP(pmp, WRITE)) 969 return EROFS; 970 break; 971 default: 972 break; 973 } 974 } 975 976 if (!EXISTSOP(pmp, ACCESS)) 977 return 0; 978 979 PUFFS_MSG_ALLOC(vn, access); 980 access_msg->pvnr_mode = ap->a_mode; 981 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 982 puffs_msg_setinfo(park_access, PUFFSOP_VN, 983 PUFFS_VN_ACCESS, VPTOPNC(vp)); 984 985 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 986 error = checkerr(pmp, error, __func__); 987 PUFFS_MSG_RELEASE(access); 988 989 return error; 990 } 991 992 static void 993 update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, 994 struct timespec *va_ttl, struct timespec *cn_ttl, int flags) 995 { 996 struct puffs_node *pn = VPTOPP(vp); 997 998 if (TTL_VALID(cn_ttl)) { 999 pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); 1000 pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); 1001 } 1002 1003 /* 1004 * Don't listen to the file server regarding special device 1005 * size info, the file server doesn't know anything about them. 1006 */ 1007 if (vp->v_type == VBLK || vp->v_type == VCHR) 1008 rvap->va_size = vp->v_size; 1009 1010 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 1011 if (vp->v_type == VBLK) 1012 rvap->va_blocksize = BLKDEV_IOSIZE; 1013 else if (vp->v_type == VCHR) 1014 rvap->va_blocksize = MAXBSIZE; 1015 1016 if (vap != NULL) { 1017 (void) memcpy(vap, rvap, sizeof(struct vattr)); 1018 vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; 1019 1020 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1021 vap->va_atime = pn->pn_mc_atime; 1022 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1023 vap->va_ctime = pn->pn_mc_ctime; 1024 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1025 vap->va_mtime = pn->pn_mc_mtime; 1026 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1027 vap->va_size = pn->pn_mc_size; 1028 } 1029 1030 if (!(pn->pn_stat & PNODE_METACACHE_SIZE) && (flags & SETATTR_CHSIZE)) { 1031 if (rvap->va_size != VNOVAL 1032 && vp->v_type != VBLK && vp->v_type != VCHR) { 1033 uvm_vnp_setsize(vp, rvap->va_size); 1034 pn->pn_serversize = rvap->va_size; 1035 } 1036 } 1037 1038 if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { 1039 if (pn->pn_va_cache == NULL) 1040 pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); 1041 1042 (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); 1043 1044 pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); 1045 } 1046 } 1047 1048 static void 1049 update_parent(struct vnode *vp, struct vnode *dvp) 1050 { 1051 struct puffs_node *pn = VPTOPP(vp); 1052 1053 if (pn->pn_parent != NULL) { 1054 KASSERT(pn->pn_parent != dvp); 1055 vrele(pn->pn_parent); 1056 } 1057 1058 vref(dvp); 1059 pn->pn_parent = dvp; 1060 } 1061 1062 int 1063 puffs_vnop_getattr(void *v) 1064 { 1065 struct vop_getattr_args /* { 1066 const struct vnodeop_desc *a_desc; 1067 struct vnode *a_vp; 1068 struct vattr *a_vap; 1069 kauth_cred_t a_cred; 1070 } */ *ap = v; 1071 PUFFS_MSG_VARS(vn, getattr); 1072 struct vnode *vp = ap->a_vp; 1073 struct mount *mp = vp->v_mount; 1074 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1075 struct vattr *vap, *rvap; 1076 struct puffs_node *pn = VPTOPP(vp); 1077 struct timespec *va_ttl = NULL; 1078 int error = 0; 1079 1080 /* 1081 * A lock is required so that we do not race with 1082 * setattr, write and fsync when changing vp->v_size. 1083 * This is critical, since setting a stall smaler value 1084 * triggers a file truncate in uvm_vnp_setsize(), which 1085 * most of the time means data corruption (a chunk of 1086 * data is replaced by zeroes). This can be removed if 1087 * we decide one day that VOP_GETATTR must operate on 1088 * a locked vnode. 1089 * 1090 * XXX Should be useless now that VOP_GETATTR has been 1091 * fixed to always require a shared lock at least. 1092 */ 1093 mutex_enter(&pn->pn_sizemtx); 1094 1095 REFPN(pn); 1096 vap = ap->a_vap; 1097 1098 if (PUFFS_USE_FS_TTL(pmp)) { 1099 if (!TIMED_OUT(pn->pn_va_timeout)) { 1100 update_va(vp, vap, pn->pn_va_cache, 1101 NULL, NULL, SETATTR_CHSIZE); 1102 goto out2; 1103 } 1104 } 1105 1106 PUFFS_MSG_ALLOC(vn, getattr); 1107 vattr_null(&getattr_msg->pvnr_va); 1108 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 1109 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 1110 PUFFS_VN_GETATTR, VPTOPNC(vp)); 1111 1112 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 1113 error = checkerr(pmp, error, __func__); 1114 if (error) 1115 goto out; 1116 1117 rvap = &getattr_msg->pvnr_va; 1118 1119 if (PUFFS_USE_FS_TTL(pmp)) 1120 va_ttl = &getattr_msg->pvnr_va_ttl; 1121 1122 update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); 1123 1124 out: 1125 PUFFS_MSG_RELEASE(getattr); 1126 1127 out2: 1128 puffs_releasenode(pn); 1129 1130 mutex_exit(&pn->pn_sizemtx); 1131 1132 return error; 1133 } 1134 1135 static int 1136 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) 1137 { 1138 PUFFS_MSG_VARS(vn, setattr); 1139 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1140 struct puffs_node *pn = vp->v_data; 1141 int error = 0; 1142 1143 KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); 1144 1145 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 1146 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 1147 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 1148 || vap->va_mode != (mode_t)VNOVAL)) 1149 return EROFS; 1150 1151 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 1152 && vp->v_type == VREG && vap->va_size != VNOVAL) 1153 return EROFS; 1154 1155 /* 1156 * Flush metacache first. If we are called with some explicit 1157 * parameters, treat them as information overriding metacache 1158 * information. 1159 */ 1160 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1161 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 1162 && vap->va_atime.tv_sec == VNOVAL) 1163 vap->va_atime = pn->pn_mc_atime; 1164 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 1165 && vap->va_ctime.tv_sec == VNOVAL) 1166 vap->va_ctime = pn->pn_mc_ctime; 1167 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 1168 && vap->va_mtime.tv_sec == VNOVAL) 1169 vap->va_mtime = pn->pn_mc_mtime; 1170 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 1171 && vap->va_size == VNOVAL) 1172 vap->va_size = pn->pn_mc_size; 1173 1174 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1175 } 1176 1177 /* 1178 * Flush attribute cache so that another thread do 1179 * not get a stale value during the operation. 1180 */ 1181 if (PUFFS_USE_FS_TTL(pmp)) 1182 pn->pn_va_timeout = 0; 1183 1184 PUFFS_MSG_ALLOC(vn, setattr); 1185 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 1186 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 1187 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 1188 PUFFS_VN_SETATTR, VPTOPNC(vp)); 1189 if (flags & SETATTR_ASYNC) 1190 puffs_msg_setfaf(park_setattr); 1191 1192 puffs_msg_enqueue(pmp, park_setattr); 1193 if ((flags & SETATTR_ASYNC) == 0) 1194 error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); 1195 1196 if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { 1197 struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; 1198 struct vattr *rvap = &setattr_msg->pvnr_va; 1199 1200 update_va(vp, NULL, rvap, va_ttl, NULL, flags); 1201 } 1202 1203 PUFFS_MSG_RELEASE(setattr); 1204 if ((flags & SETATTR_ASYNC) == 0) { 1205 error = checkerr(pmp, error, __func__); 1206 if (error) 1207 return error; 1208 } else { 1209 error = 0; 1210 } 1211 1212 if (vap->va_size != VNOVAL) { 1213 pn->pn_serversize = vap->va_size; 1214 if (flags & SETATTR_CHSIZE) 1215 uvm_vnp_setsize(vp, vap->va_size); 1216 } 1217 1218 return 0; 1219 } 1220 1221 int 1222 puffs_vnop_setattr(void *v) 1223 { 1224 struct vop_getattr_args /* { 1225 const struct vnodeop_desc *a_desc; 1226 struct vnode *a_vp; 1227 struct vattr *a_vap; 1228 kauth_cred_t a_cred; 1229 } */ *ap = v; 1230 struct puffs_node *pn = ap->a_vp->v_data; 1231 int error; 1232 1233 mutex_enter(&pn->pn_sizemtx); 1234 error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); 1235 mutex_exit(&pn->pn_sizemtx); 1236 1237 return error; 1238 } 1239 1240 static __inline int 1241 doinact(struct puffs_mount *pmp, int iaflag) 1242 { 1243 1244 if (EXISTSOP(pmp, INACTIVE)) 1245 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 1246 if (iaflag || ALLOPS(pmp)) 1247 return 1; 1248 else 1249 return 0; 1250 else 1251 return 1; 1252 else 1253 return 0; 1254 } 1255 1256 static void 1257 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 1258 { 1259 PUFFS_MSG_VARS(vn, inactive); 1260 1261 if (doinact(pmp, iaflag)) { 1262 PUFFS_MSG_ALLOC(vn, inactive); 1263 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1264 PUFFS_VN_INACTIVE, ck); 1265 PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); 1266 PUFFS_MSG_RELEASE(inactive); 1267 } 1268 } 1269 1270 /* XXX: callinactive can't setback */ 1271 int 1272 puffs_vnop_inactive(void *v) 1273 { 1274 struct vop_inactive_args /* { 1275 const struct vnodeop_desc *a_desc; 1276 struct vnode *a_vp; 1277 } */ *ap = v; 1278 PUFFS_MSG_VARS(vn, inactive); 1279 struct vnode *vp = ap->a_vp; 1280 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1281 struct puffs_node *pnode; 1282 bool recycle = false; 1283 1284 pnode = vp->v_data; 1285 mutex_enter(&pnode->pn_sizemtx); 1286 1287 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1288 flushvncache(vp, 0, 0, false); 1289 PUFFS_MSG_ALLOC(vn, inactive); 1290 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1291 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1292 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, 1293 NULL); 1294 PUFFS_MSG_RELEASE(inactive); 1295 } 1296 pnode->pn_stat &= ~PNODE_DOINACT; 1297 1298 /* 1299 * file server thinks it's gone? then don't be afraid care, 1300 * node's life was already all it would ever be 1301 */ 1302 if (pnode->pn_stat & PNODE_NOREFS) { 1303 pnode->pn_stat |= PNODE_DYING; 1304 recycle = true; 1305 } 1306 1307 /* 1308 * Handle node TTL. 1309 * If grace has already timed out, make it reclaimed. 1310 * Otherwise, we queue its expiration by sop thread, so 1311 * that it does not remain for ages in the freelist, 1312 * holding memory in userspace, while we will have 1313 * to look it up again anyway. 1314 */ 1315 if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { 1316 bool incache = !TIMED_OUT(pnode->pn_cn_timeout); 1317 bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); 1318 bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; 1319 1320 if (!incache && !ingrace && !reclaimqueued) { 1321 pnode->pn_stat |= PNODE_DYING; 1322 recycle = true; 1323 } 1324 1325 if (!recycle && !reclaimqueued) { 1326 struct puffs_sopreq *psopr; 1327 int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); 1328 1329 KASSERT(curlwp != uvm.pagedaemon_lwp); 1330 psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); 1331 psopr->psopr_ck = VPTOPNC(pnode->pn_vp); 1332 psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; 1333 psopr->psopr_at = at; 1334 1335 mutex_enter(&pmp->pmp_sopmtx); 1336 1337 /* 1338 * If thread has disapeared, just give up. The 1339 * fs is being unmounted and the node will be 1340 * be reclaimed anyway. 1341 * 1342 * Otherwise, we queue the request but do not 1343 * immediatly signal the thread, as the node 1344 * has not been expired yet. 1345 */ 1346 if (pmp->pmp_sopthrcount == 0) { 1347 kmem_free(psopr, sizeof(*psopr)); 1348 } else { 1349 TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, 1350 psopr, psopr_entries); 1351 pnode->pn_stat |= PNODE_SOPEXP; 1352 } 1353 1354 mutex_exit(&pmp->pmp_sopmtx); 1355 } 1356 } 1357 1358 *ap->a_recycle = recycle; 1359 1360 mutex_exit(&pnode->pn_sizemtx); 1361 VOP_UNLOCK(vp); 1362 1363 return 0; 1364 } 1365 1366 static void 1367 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) 1368 { 1369 PUFFS_MSG_VARS(vn, reclaim); 1370 1371 if (!EXISTSOP(pmp, RECLAIM)) 1372 return; 1373 1374 PUFFS_MSG_ALLOC(vn, reclaim); 1375 reclaim_msg->pvnr_nlookup = nlookup; 1376 puffs_msg_setfaf(park_reclaim); 1377 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1378 1379 puffs_msg_enqueue(pmp, park_reclaim); 1380 PUFFS_MSG_RELEASE(reclaim); 1381 return; 1382 } 1383 1384 /* 1385 * always FAF, we don't really care if the server wants to fail to 1386 * reclaim the node or not 1387 */ 1388 int 1389 puffs_vnop_reclaim(void *v) 1390 { 1391 struct vop_reclaim_args /* { 1392 const struct vnodeop_desc *a_desc; 1393 struct vnode *a_vp; 1394 } */ *ap = v; 1395 struct vnode *vp = ap->a_vp; 1396 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1397 struct puffs_node *pnode = vp->v_data; 1398 bool notifyserver = true; 1399 1400 /* 1401 * first things first: check if someone is trying to reclaim the 1402 * root vnode. do not allow that to travel to userspace. 1403 * Note that we don't need to take the lock similarly to 1404 * puffs_root(), since there is only one of us. 1405 */ 1406 if (vp->v_vflag & VV_ROOT) { 1407 mutex_enter(&pmp->pmp_lock); 1408 KASSERT(pmp->pmp_root != NULL); 1409 pmp->pmp_root = NULL; 1410 mutex_exit(&pmp->pmp_lock); 1411 notifyserver = false; 1412 } 1413 1414 /* 1415 * purge info from kernel before issueing FAF, since we 1416 * don't really know when we'll get around to it after 1417 * that and someone might race us into node creation 1418 */ 1419 mutex_enter(&pmp->pmp_lock); 1420 LIST_REMOVE(pnode, pn_hashent); 1421 if (PUFFS_USE_NAMECACHE(pmp)) 1422 cache_purge(vp); 1423 mutex_exit(&pmp->pmp_lock); 1424 1425 if (notifyserver) { 1426 int nlookup = VPTOPP(vp)->pn_nlookup; 1427 1428 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); 1429 } 1430 1431 if (PUFFS_USE_DOTDOTCACHE(pmp)) { 1432 if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) 1433 vrele(VPTOPP(vp)->pn_parent); 1434 else 1435 KASSERT(vp->v_vflag & VV_ROOT); 1436 } 1437 1438 puffs_putvnode(vp); 1439 vp->v_data = NULL; 1440 1441 return 0; 1442 } 1443 1444 #define CSIZE sizeof(**ap->a_cookies) 1445 int 1446 puffs_vnop_readdir(void *v) 1447 { 1448 struct vop_readdir_args /* { 1449 const struct vnodeop_desc *a_desc; 1450 struct vnode *a_vp; 1451 struct uio *a_uio; 1452 kauth_cred_t a_cred; 1453 int *a_eofflag; 1454 off_t **a_cookies; 1455 int *a_ncookies; 1456 } */ *ap = v; 1457 PUFFS_MSG_VARS(vn, readdir); 1458 struct vnode *vp = ap->a_vp; 1459 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1460 size_t argsize, tomove, cookiemem, cookiesmax; 1461 struct uio *uio = ap->a_uio; 1462 size_t howmuch, resid; 1463 int error; 1464 1465 /* 1466 * ok, so we need: resid + cookiemem = maxreq 1467 * => resid + cookiesize * (resid/minsize) = maxreq 1468 * => resid + cookiesize/minsize * resid = maxreq 1469 * => (cookiesize/minsize + 1) * resid = maxreq 1470 * => resid = maxreq / (cookiesize/minsize + 1) 1471 * 1472 * Since cookiesize <= minsize and we're not very big on floats, 1473 * we approximate that to be 1. Therefore: 1474 * 1475 * resid = maxreq / 2; 1476 * 1477 * Well, at least we didn't have to use differential equations 1478 * or the Gram-Schmidt process. 1479 * 1480 * (yes, I'm very afraid of this) 1481 */ 1482 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1483 1484 if (ap->a_cookies) { 1485 KASSERT(ap->a_ncookies != NULL); 1486 if (pmp->pmp_args.pa_fhsize == 0) 1487 return EOPNOTSUPP; 1488 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1489 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1490 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1491 } else { 1492 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1493 cookiesmax = 0; 1494 cookiemem = 0; 1495 } 1496 1497 argsize = sizeof(struct puffs_vnmsg_readdir); 1498 tomove = resid + cookiemem; 1499 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1500 (void *)&readdir_msg, 1); 1501 1502 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1503 readdir_msg->pvnr_offset = uio->uio_offset; 1504 readdir_msg->pvnr_resid = resid; 1505 readdir_msg->pvnr_ncookies = cookiesmax; 1506 readdir_msg->pvnr_eofflag = 0; 1507 readdir_msg->pvnr_dentoff = cookiemem; 1508 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1509 PUFFS_VN_READDIR, VPTOPNC(vp)); 1510 puffs_msg_setdelta(park_readdir, tomove); 1511 1512 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1513 error = checkerr(pmp, error, __func__); 1514 if (error) 1515 goto out; 1516 1517 /* userspace is cheating? */ 1518 if (readdir_msg->pvnr_resid > resid) { 1519 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1520 "resid grew", VPTOPNC(vp)); 1521 ERROUT(EPROTO); 1522 } 1523 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1524 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1525 "too many cookies", VPTOPNC(vp)); 1526 ERROUT(EPROTO); 1527 } 1528 1529 /* check eof */ 1530 if (readdir_msg->pvnr_eofflag) 1531 *ap->a_eofflag = 1; 1532 1533 /* bouncy-wouncy with the directory data */ 1534 howmuch = resid - readdir_msg->pvnr_resid; 1535 1536 /* force eof if no data was returned (getcwd() needs this) */ 1537 if (howmuch == 0) { 1538 *ap->a_eofflag = 1; 1539 goto out; 1540 } 1541 1542 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1543 if (error) 1544 goto out; 1545 1546 /* provide cookies to caller if so desired */ 1547 if (ap->a_cookies) { 1548 KASSERT(curlwp != uvm.pagedaemon_lwp); 1549 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1550 M_TEMP, M_WAITOK); 1551 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1552 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1553 *ap->a_ncookies*CSIZE); 1554 } 1555 1556 /* next readdir starts here */ 1557 uio->uio_offset = readdir_msg->pvnr_offset; 1558 1559 out: 1560 puffs_msgmem_release(park_readdir); 1561 return error; 1562 } 1563 #undef CSIZE 1564 1565 /* 1566 * poll works by consuming the bitmask in pn_revents. If there are 1567 * events available, poll returns immediately. If not, it issues a 1568 * poll to userspace, selrecords itself and returns with no available 1569 * events. When the file server returns, it executes puffs_parkdone_poll(), 1570 * where available events are added to the bitmask. selnotify() is 1571 * then also executed by that function causing us to enter here again 1572 * and hopefully find the missing bits (unless someone got them first, 1573 * in which case it starts all over again). 1574 */ 1575 int 1576 puffs_vnop_poll(void *v) 1577 { 1578 struct vop_poll_args /* { 1579 const struct vnodeop_desc *a_desc; 1580 struct vnode *a_vp; 1581 int a_events; 1582 } */ *ap = v; 1583 PUFFS_MSG_VARS(vn, poll); 1584 struct vnode *vp = ap->a_vp; 1585 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1586 struct puffs_node *pn = vp->v_data; 1587 int events; 1588 1589 if (EXISTSOP(pmp, POLL)) { 1590 mutex_enter(&pn->pn_mtx); 1591 events = pn->pn_revents & ap->a_events; 1592 if (events & ap->a_events) { 1593 pn->pn_revents &= ~ap->a_events; 1594 mutex_exit(&pn->pn_mtx); 1595 1596 return events; 1597 } else { 1598 puffs_referencenode(pn); 1599 mutex_exit(&pn->pn_mtx); 1600 1601 PUFFS_MSG_ALLOC(vn, poll); 1602 poll_msg->pvnr_events = ap->a_events; 1603 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1604 PUFFS_VN_POLL, VPTOPNC(vp)); 1605 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1606 selrecord(curlwp, &pn->pn_sel); 1607 1608 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, 1609 vp->v_data, NULL); 1610 PUFFS_MSG_RELEASE(poll); 1611 1612 return 0; 1613 } 1614 } else { 1615 return genfs_poll(v); 1616 } 1617 } 1618 1619 static int 1620 flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) 1621 { 1622 struct puffs_node *pn = VPTOPP(vp); 1623 struct vattr va; 1624 int pflags, error; 1625 1626 /* flush out information from our metacache, see vop_setattr */ 1627 if (pn->pn_stat & PNODE_METACACHE_MASK 1628 && (pn->pn_stat & PNODE_DYING) == 0) { 1629 vattr_null(&va); 1630 error = dosetattr(vp, &va, FSCRED, 1631 SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); 1632 if (error) 1633 return error; 1634 } 1635 1636 /* 1637 * flush pages to avoid being overly dirty 1638 */ 1639 pflags = PGO_CLEANIT; 1640 if (wait) 1641 pflags |= PGO_SYNCIO; 1642 1643 mutex_enter(vp->v_interlock); 1644 return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); 1645 } 1646 1647 int 1648 puffs_vnop_fsync(void *v) 1649 { 1650 struct vop_fsync_args /* { 1651 const struct vnodeop_desc *a_desc; 1652 struct vnode *a_vp; 1653 kauth_cred_t a_cred; 1654 int a_flags; 1655 off_t a_offlo; 1656 off_t a_offhi; 1657 } */ *ap = v; 1658 PUFFS_MSG_VARS(vn, fsync); 1659 struct vnode *vp; 1660 struct puffs_node *pn; 1661 struct puffs_mount *pmp; 1662 int error, dofaf; 1663 1664 vp = ap->a_vp; 1665 KASSERT(vp != NULL); 1666 pn = VPTOPP(vp); 1667 KASSERT(pn != NULL); 1668 pmp = MPTOPUFFSMP(vp->v_mount); 1669 if (ap->a_flags & FSYNC_WAIT) { 1670 mutex_enter(&pn->pn_sizemtx); 1671 } else { 1672 if (mutex_tryenter(&pn->pn_sizemtx) == 0) 1673 return EDEADLK; 1674 } 1675 1676 error = flushvncache(vp, ap->a_offlo, ap->a_offhi, 1677 (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); 1678 if (error) 1679 goto out; 1680 1681 /* 1682 * HELLO! We exit already here if the user server does not 1683 * support fsync OR if we should call fsync for a node which 1684 * has references neither in the kernel or the fs server. 1685 * Otherwise we continue to issue fsync() forward. 1686 */ 1687 error = 0; 1688 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1689 goto out; 1690 1691 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1692 /* 1693 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1694 * only FAFs for those. Otherwise there's a danger of deadlock, 1695 * since the execution context here might be the user server 1696 * doing some operation on another fs, which in turn caused a 1697 * vnode to be reclaimed from the freelist for this fs. 1698 */ 1699 if (dofaf == 0) { 1700 mutex_enter(vp->v_interlock); 1701 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 1702 dofaf = 1; 1703 mutex_exit(vp->v_interlock); 1704 } 1705 1706 PUFFS_MSG_ALLOC(vn, fsync); 1707 if (dofaf) 1708 puffs_msg_setfaf(park_fsync); 1709 1710 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1711 fsync_msg->pvnr_flags = ap->a_flags; 1712 fsync_msg->pvnr_offlo = ap->a_offlo; 1713 fsync_msg->pvnr_offhi = ap->a_offhi; 1714 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1715 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1716 1717 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1718 PUFFS_MSG_RELEASE(fsync); 1719 1720 error = checkerr(pmp, error, __func__); 1721 1722 out: 1723 mutex_exit(&pn->pn_sizemtx); 1724 return error; 1725 } 1726 1727 int 1728 puffs_vnop_seek(void *v) 1729 { 1730 struct vop_seek_args /* { 1731 const struct vnodeop_desc *a_desc; 1732 struct vnode *a_vp; 1733 off_t a_oldoff; 1734 off_t a_newoff; 1735 kauth_cred_t a_cred; 1736 } */ *ap = v; 1737 PUFFS_MSG_VARS(vn, seek); 1738 struct vnode *vp = ap->a_vp; 1739 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1740 int error; 1741 1742 PUFFS_MSG_ALLOC(vn, seek); 1743 seek_msg->pvnr_oldoff = ap->a_oldoff; 1744 seek_msg->pvnr_newoff = ap->a_newoff; 1745 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1746 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1747 PUFFS_VN_SEEK, VPTOPNC(vp)); 1748 1749 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1750 PUFFS_MSG_RELEASE(seek); 1751 return checkerr(pmp, error, __func__); 1752 } 1753 1754 static int 1755 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1756 struct componentname *cnp) 1757 { 1758 PUFFS_MSG_VARS(vn, remove); 1759 int error; 1760 1761 PUFFS_MSG_ALLOC(vn, remove); 1762 remove_msg->pvnr_cookie_targ = ck; 1763 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1764 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1765 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1766 1767 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1768 PUFFS_MSG_RELEASE(remove); 1769 1770 return checkerr(pmp, error, __func__); 1771 } 1772 1773 /* 1774 * XXX: can't use callremove now because can't catch setbacks with 1775 * it due to lack of a pnode argument. 1776 */ 1777 int 1778 puffs_vnop_remove(void *v) 1779 { 1780 struct vop_remove_args /* { 1781 const struct vnodeop_desc *a_desc; 1782 struct vnode *a_dvp; 1783 struct vnode *a_vp; 1784 struct componentname *a_cnp; 1785 } */ *ap = v; 1786 PUFFS_MSG_VARS(vn, remove); 1787 struct vnode *dvp = ap->a_dvp; 1788 struct vnode *vp = ap->a_vp; 1789 struct puffs_node *dpn = VPTOPP(dvp); 1790 struct puffs_node *pn = VPTOPP(vp); 1791 struct componentname *cnp = ap->a_cnp; 1792 struct mount *mp = dvp->v_mount; 1793 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1794 int error; 1795 1796 PUFFS_MSG_ALLOC(vn, remove); 1797 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1798 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1799 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1800 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1801 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1802 1803 puffs_msg_enqueue(pmp, park_remove); 1804 REFPN_AND_UNLOCKVP(dvp, dpn); 1805 if (dvp == vp) 1806 REFPN(pn); 1807 else 1808 REFPN_AND_UNLOCKVP(vp, pn); 1809 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1810 1811 PUFFS_MSG_RELEASE(remove); 1812 1813 RELEPN_AND_VP(dvp, dpn); 1814 RELEPN_AND_VP(vp, pn); 1815 1816 error = checkerr(pmp, error, __func__); 1817 return error; 1818 } 1819 1820 int 1821 puffs_vnop_mkdir(void *v) 1822 { 1823 struct vop_mkdir_v3_args /* { 1824 const struct vnodeop_desc *a_desc; 1825 struct vnode *a_dvp; 1826 struct vnode **a_vpp; 1827 struct componentname *a_cnp; 1828 struct vattr *a_vap; 1829 } */ *ap = v; 1830 PUFFS_MSG_VARS(vn, mkdir); 1831 struct vnode *dvp = ap->a_dvp; 1832 struct puffs_node *dpn = VPTOPP(dvp); 1833 struct componentname *cnp = ap->a_cnp; 1834 struct mount *mp = dvp->v_mount; 1835 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1836 int error; 1837 1838 PUFFS_MSG_ALLOC(vn, mkdir); 1839 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1840 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1841 mkdir_msg->pvnr_va = *ap->a_vap; 1842 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1843 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1844 1845 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1846 1847 error = checkerr(pmp, error, __func__); 1848 if (error) 1849 goto out; 1850 1851 error = puffs_newnode(mp, dvp, ap->a_vpp, 1852 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1853 if (error) { 1854 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1855 mkdir_msg->pvnr_newnode, cnp); 1856 goto out; 1857 } 1858 1859 if (PUFFS_USE_FS_TTL(pmp)) { 1860 struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; 1861 struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; 1862 struct vattr *rvap = &mkdir_msg->pvnr_va; 1863 1864 update_va(*ap->a_vpp, NULL, rvap, 1865 va_ttl, cn_ttl, SETATTR_CHSIZE); 1866 } 1867 1868 VPTOPP(*ap->a_vpp)->pn_nlookup++; 1869 1870 if (PUFFS_USE_DOTDOTCACHE(pmp) && 1871 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 1872 update_parent(*ap->a_vpp, dvp); 1873 1874 out: 1875 PUFFS_MSG_RELEASE(mkdir); 1876 return error; 1877 } 1878 1879 static int 1880 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1881 struct componentname *cnp) 1882 { 1883 PUFFS_MSG_VARS(vn, rmdir); 1884 int error; 1885 1886 PUFFS_MSG_ALLOC(vn, rmdir); 1887 rmdir_msg->pvnr_cookie_targ = ck; 1888 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1889 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1890 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1891 1892 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1893 PUFFS_MSG_RELEASE(rmdir); 1894 1895 return checkerr(pmp, error, __func__); 1896 } 1897 1898 int 1899 puffs_vnop_rmdir(void *v) 1900 { 1901 struct vop_rmdir_args /* { 1902 const struct vnodeop_desc *a_desc; 1903 struct vnode *a_dvp; 1904 struct vnode *a_vp; 1905 struct componentname *a_cnp; 1906 } */ *ap = v; 1907 PUFFS_MSG_VARS(vn, rmdir); 1908 struct vnode *dvp = ap->a_dvp; 1909 struct vnode *vp = ap->a_vp; 1910 struct puffs_node *dpn = VPTOPP(dvp); 1911 struct puffs_node *pn = VPTOPP(vp); 1912 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1913 struct componentname *cnp = ap->a_cnp; 1914 int error; 1915 1916 PUFFS_MSG_ALLOC(vn, rmdir); 1917 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1918 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1919 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1920 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1921 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1922 1923 puffs_msg_enqueue(pmp, park_rmdir); 1924 REFPN_AND_UNLOCKVP(dvp, dpn); 1925 REFPN_AND_UNLOCKVP(vp, pn); 1926 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1927 1928 PUFFS_MSG_RELEASE(rmdir); 1929 1930 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1931 RELEPN_AND_VP(dvp, dpn); 1932 RELEPN_AND_VP(vp, pn); 1933 1934 return error; 1935 } 1936 1937 int 1938 puffs_vnop_link(void *v) 1939 { 1940 struct vop_link_args /* { 1941 const struct vnodeop_desc *a_desc; 1942 struct vnode *a_dvp; 1943 struct vnode *a_vp; 1944 struct componentname *a_cnp; 1945 } */ *ap = v; 1946 PUFFS_MSG_VARS(vn, link); 1947 struct vnode *dvp = ap->a_dvp; 1948 struct vnode *vp = ap->a_vp; 1949 struct puffs_node *dpn = VPTOPP(dvp); 1950 struct puffs_node *pn = VPTOPP(vp); 1951 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1952 struct componentname *cnp = ap->a_cnp; 1953 int error; 1954 1955 PUFFS_MSG_ALLOC(vn, link); 1956 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1957 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1958 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1959 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1960 PUFFS_VN_LINK, VPTOPNC(dvp)); 1961 1962 puffs_msg_enqueue(pmp, park_link); 1963 REFPN_AND_UNLOCKVP(dvp, dpn); 1964 REFPN(pn); 1965 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1966 1967 PUFFS_MSG_RELEASE(link); 1968 1969 error = checkerr(pmp, error, __func__); 1970 1971 /* 1972 * XXX: stay in touch with the cache. I don't like this, but 1973 * don't have a better solution either. See also puffs_rename(). 1974 */ 1975 if (error == 0) 1976 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1977 1978 RELEPN_AND_VP(dvp, dpn); 1979 puffs_releasenode(pn); 1980 1981 return error; 1982 } 1983 1984 int 1985 puffs_vnop_symlink(void *v) 1986 { 1987 struct vop_symlink_v3_args /* { 1988 const struct vnodeop_desc *a_desc; 1989 struct vnode *a_dvp; 1990 struct vnode **a_vpp; 1991 struct componentname *a_cnp; 1992 struct vattr *a_vap; 1993 char *a_target; 1994 } */ *ap = v; 1995 PUFFS_MSG_VARS(vn, symlink); 1996 struct vnode *dvp = ap->a_dvp; 1997 struct puffs_node *dpn = VPTOPP(dvp); 1998 struct mount *mp = dvp->v_mount; 1999 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2000 struct componentname *cnp = ap->a_cnp; 2001 int error; 2002 2003 *ap->a_vpp = NULL; 2004 2005 PUFFS_MSG_ALLOC(vn, symlink); 2006 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 2007 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2008 symlink_msg->pvnr_va = *ap->a_vap; 2009 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 2010 sizeof(symlink_msg->pvnr_link)); 2011 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 2012 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 2013 2014 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 2015 2016 error = checkerr(pmp, error, __func__); 2017 if (error) 2018 goto out; 2019 2020 error = puffs_newnode(mp, dvp, ap->a_vpp, 2021 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 2022 if (error) { 2023 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 2024 symlink_msg->pvnr_newnode, cnp); 2025 goto out; 2026 } 2027 2028 if (PUFFS_USE_FS_TTL(pmp)) { 2029 struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; 2030 struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; 2031 struct vattr *rvap = &symlink_msg->pvnr_va; 2032 2033 update_va(*ap->a_vpp, NULL, rvap, 2034 va_ttl, cn_ttl, SETATTR_CHSIZE); 2035 } 2036 2037 VPTOPP(*ap->a_vpp)->pn_nlookup++; 2038 2039 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2040 (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) 2041 update_parent(*ap->a_vpp, dvp); 2042 2043 out: 2044 PUFFS_MSG_RELEASE(symlink); 2045 2046 return error; 2047 } 2048 2049 int 2050 puffs_vnop_readlink(void *v) 2051 { 2052 struct vop_readlink_args /* { 2053 const struct vnodeop_desc *a_desc; 2054 struct vnode *a_vp; 2055 struct uio *a_uio; 2056 kauth_cred_t a_cred; 2057 } */ *ap = v; 2058 PUFFS_MSG_VARS(vn, readlink); 2059 struct vnode *vp = ap->a_vp; 2060 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2061 size_t linklen; 2062 int error; 2063 2064 PUFFS_MSG_ALLOC(vn, readlink); 2065 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 2066 linklen = sizeof(readlink_msg->pvnr_link); 2067 readlink_msg->pvnr_linklen = linklen; 2068 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 2069 PUFFS_VN_READLINK, VPTOPNC(vp)); 2070 2071 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 2072 error = checkerr(pmp, error, __func__); 2073 if (error) 2074 goto out; 2075 2076 /* bad bad user file server */ 2077 if (readlink_msg->pvnr_linklen > linklen) { 2078 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 2079 "linklen too big", VPTOPNC(ap->a_vp)); 2080 error = EPROTO; 2081 goto out; 2082 } 2083 2084 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 2085 ap->a_uio); 2086 out: 2087 PUFFS_MSG_RELEASE(readlink); 2088 return error; 2089 } 2090 2091 int 2092 puffs_vnop_rename(void *v) 2093 { 2094 struct vop_rename_args /* { 2095 const struct vnodeop_desc *a_desc; 2096 struct vnode *a_fdvp; 2097 struct vnode *a_fvp; 2098 struct componentname *a_fcnp; 2099 struct vnode *a_tdvp; 2100 struct vnode *a_tvp; 2101 struct componentname *a_tcnp; 2102 } */ *ap = v; 2103 PUFFS_MSG_VARS(vn, rename); 2104 struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; 2105 struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; 2106 struct puffs_node *fpn = ap->a_fvp->v_data; 2107 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 2108 int error; 2109 bool doabort = true; 2110 2111 if ((fvp->v_mount != tdvp->v_mount) || 2112 (tvp && (fvp->v_mount != tvp->v_mount))) { 2113 ERROUT(EXDEV); 2114 } 2115 2116 PUFFS_MSG_ALLOC(vn, rename); 2117 rename_msg->pvnr_cookie_src = VPTOPNC(fvp); 2118 rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); 2119 if (tvp) 2120 rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); 2121 else 2122 rename_msg->pvnr_cookie_targ = NULL; 2123 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 2124 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 2125 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 2126 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 2127 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 2128 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 2129 2130 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 2131 doabort = false; 2132 PUFFS_MSG_RELEASE(rename); 2133 error = checkerr(pmp, error, __func__); 2134 2135 /* 2136 * XXX: stay in touch with the cache. I don't like this, but 2137 * don't have a better solution either. See also puffs_link(). 2138 */ 2139 if (error == 0) { 2140 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 2141 2142 if (PUFFS_USE_DOTDOTCACHE(pmp) && 2143 (VPTOPP(fvp)->pn_parent != tdvp)) 2144 update_parent(fvp, tdvp); 2145 } 2146 2147 2148 out: 2149 if (doabort) 2150 VOP_ABORTOP(tdvp, ap->a_tcnp); 2151 if (tvp != NULL) 2152 vput(tvp); 2153 if (tdvp == tvp) 2154 vrele(tdvp); 2155 else 2156 vput(tdvp); 2157 2158 if (doabort) 2159 VOP_ABORTOP(fdvp, ap->a_fcnp); 2160 vrele(fdvp); 2161 vrele(fvp); 2162 2163 return error; 2164 } 2165 2166 #define RWARGS(cont, iofl, move, offset, creds) \ 2167 (cont)->pvnr_ioflag = (iofl); \ 2168 (cont)->pvnr_resid = (move); \ 2169 (cont)->pvnr_offset = (offset); \ 2170 puffs_credcvt(&(cont)->pvnr_cred, creds) 2171 2172 int 2173 puffs_vnop_read(void *v) 2174 { 2175 struct vop_read_args /* { 2176 const struct vnodeop_desc *a_desc; 2177 struct vnode *a_vp; 2178 struct uio *a_uio; 2179 int a_ioflag; 2180 kauth_cred_t a_cred; 2181 } */ *ap = v; 2182 PUFFS_MSG_VARS(vn, read); 2183 struct vnode *vp = ap->a_vp; 2184 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2185 struct uio *uio = ap->a_uio; 2186 size_t tomove, argsize; 2187 vsize_t bytelen; 2188 int error; 2189 2190 read_msg = NULL; 2191 error = 0; 2192 2193 /* std sanity */ 2194 if (uio->uio_resid == 0) 2195 return 0; 2196 if (uio->uio_offset < 0) 2197 return EINVAL; 2198 2199 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2200 const int advice = IO_ADV_DECODE(ap->a_ioflag); 2201 2202 while (uio->uio_resid > 0) { 2203 if (vp->v_size <= uio->uio_offset) { 2204 break; 2205 } 2206 bytelen = MIN(uio->uio_resid, 2207 vp->v_size - uio->uio_offset); 2208 if (bytelen == 0) 2209 break; 2210 2211 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 2212 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 2213 if (error) 2214 break; 2215 } 2216 2217 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 2218 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 2219 } else { 2220 /* 2221 * in case it's not a regular file or we're operating 2222 * uncached, do read in the old-fashioned style, 2223 * i.e. explicit read operations 2224 */ 2225 2226 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2227 argsize = sizeof(struct puffs_vnmsg_read); 2228 puffs_msgmem_alloc(argsize + tomove, &park_read, 2229 (void *)&read_msg, 1); 2230 2231 error = 0; 2232 while (uio->uio_resid > 0) { 2233 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2234 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 2235 RWARGS(read_msg, ap->a_ioflag, tomove, 2236 uio->uio_offset, ap->a_cred); 2237 puffs_msg_setinfo(park_read, PUFFSOP_VN, 2238 PUFFS_VN_READ, VPTOPNC(vp)); 2239 puffs_msg_setdelta(park_read, tomove); 2240 2241 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 2242 NULL, error); 2243 error = checkerr(pmp, error, __func__); 2244 if (error) 2245 break; 2246 2247 if (read_msg->pvnr_resid > tomove) { 2248 puffs_senderr(pmp, PUFFS_ERR_READ, 2249 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2250 error = EPROTO; 2251 break; 2252 } 2253 2254 error = uiomove(read_msg->pvnr_data, 2255 tomove - read_msg->pvnr_resid, uio); 2256 2257 /* 2258 * in case the file is out of juice, resid from 2259 * userspace is != 0. and the error-case is 2260 * quite obvious 2261 */ 2262 if (error || read_msg->pvnr_resid) 2263 break; 2264 } 2265 2266 puffs_msgmem_release(park_read); 2267 } 2268 2269 return error; 2270 } 2271 2272 /* 2273 * XXX: in case of a failure, this leaves uio in a bad state. 2274 * We could theoretically copy the uio and iovecs and "replay" 2275 * them the right amount after the userspace trip, but don't 2276 * bother for now. 2277 */ 2278 int 2279 puffs_vnop_write(void *v) 2280 { 2281 struct vop_write_args /* { 2282 const struct vnodeop_desc *a_desc; 2283 struct vnode *a_vp; 2284 struct uio *a_uio; 2285 int a_ioflag; 2286 kauth_cred_t a_cred; 2287 } */ *ap = v; 2288 PUFFS_MSG_VARS(vn, write); 2289 struct vnode *vp = ap->a_vp; 2290 struct puffs_node *pn = VPTOPP(vp); 2291 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2292 struct uio *uio = ap->a_uio; 2293 size_t tomove, argsize; 2294 off_t oldoff, newoff, origoff; 2295 vsize_t bytelen; 2296 int error, uflags; 2297 int ubcflags; 2298 2299 error = uflags = 0; 2300 write_msg = NULL; 2301 2302 mutex_enter(&pn->pn_sizemtx); 2303 2304 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 2305 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 2306 2307 /* 2308 * userspace *should* be allowed to control this, 2309 * but with UBC it's a bit unclear how to handle it 2310 */ 2311 if (ap->a_ioflag & IO_APPEND) 2312 uio->uio_offset = vp->v_size; 2313 2314 origoff = uio->uio_offset; 2315 while (uio->uio_resid > 0) { 2316 if (vp->v_mount->mnt_flag & MNT_RELATIME) 2317 uflags |= PUFFS_UPDATEATIME; 2318 uflags |= PUFFS_UPDATECTIME; 2319 uflags |= PUFFS_UPDATEMTIME; 2320 oldoff = uio->uio_offset; 2321 bytelen = uio->uio_resid; 2322 2323 newoff = oldoff + bytelen; 2324 if (vp->v_size < newoff) { 2325 uvm_vnp_setwritesize(vp, newoff); 2326 } 2327 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 2328 UVM_ADV_RANDOM, ubcflags); 2329 2330 /* 2331 * In case of a ubc_uiomove() error, 2332 * opt to not extend the file at all and 2333 * return an error. Otherwise, if we attempt 2334 * to clear the memory we couldn't fault to, 2335 * we might generate a kernel page fault. 2336 */ 2337 if (vp->v_size < newoff) { 2338 if (error == 0) { 2339 uflags |= PUFFS_UPDATESIZE; 2340 uvm_vnp_setsize(vp, newoff); 2341 } else { 2342 uvm_vnp_setwritesize(vp, vp->v_size); 2343 } 2344 } 2345 if (error) 2346 break; 2347 2348 /* 2349 * If we're writing large files, flush to file server 2350 * every 64k. Otherwise we can very easily exhaust 2351 * kernel and user memory, as the file server cannot 2352 * really keep up with our writing speed. 2353 * 2354 * Note: this does *NOT* honor MNT_ASYNC, because 2355 * that gives userland too much say in the kernel. 2356 */ 2357 if (oldoff >> 16 != uio->uio_offset >> 16) { 2358 mutex_enter(vp->v_interlock); 2359 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 2360 uio->uio_offset & ~0xffff, 2361 PGO_CLEANIT | PGO_SYNCIO); 2362 if (error) 2363 break; 2364 } 2365 } 2366 2367 /* synchronous I/O? */ 2368 if (error == 0 && ap->a_ioflag & IO_SYNC) { 2369 mutex_enter(vp->v_interlock); 2370 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2371 round_page(uio->uio_offset), 2372 PGO_CLEANIT | PGO_SYNCIO); 2373 2374 /* write through page cache? */ 2375 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 2376 mutex_enter(vp->v_interlock); 2377 error = VOP_PUTPAGES(vp, trunc_page(origoff), 2378 round_page(uio->uio_offset), PGO_CLEANIT); 2379 } 2380 2381 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 2382 } else { 2383 /* tomove is non-increasing */ 2384 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2385 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2386 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 2387 2388 while (uio->uio_resid > 0) { 2389 /* move data to buffer */ 2390 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2391 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2392 RWARGS(write_msg, ap->a_ioflag, tomove, 2393 uio->uio_offset, ap->a_cred); 2394 error = uiomove(write_msg->pvnr_data, tomove, uio); 2395 if (error) 2396 break; 2397 2398 /* move buffer to userspace */ 2399 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2400 PUFFS_VN_WRITE, VPTOPNC(vp)); 2401 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2402 NULL, error); 2403 error = checkerr(pmp, error, __func__); 2404 if (error) 2405 break; 2406 2407 if (write_msg->pvnr_resid > tomove) { 2408 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2409 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2410 error = EPROTO; 2411 break; 2412 } 2413 2414 /* adjust file size */ 2415 if (vp->v_size < uio->uio_offset) 2416 uvm_vnp_setsize(vp, uio->uio_offset); 2417 2418 /* didn't move everything? bad userspace. bail */ 2419 if (write_msg->pvnr_resid != 0) { 2420 error = EIO; 2421 break; 2422 } 2423 } 2424 puffs_msgmem_release(park_write); 2425 } 2426 2427 mutex_exit(&pn->pn_sizemtx); 2428 return error; 2429 } 2430 2431 int 2432 puffs_vnop_print(void *v) 2433 { 2434 struct vop_print_args /* { 2435 struct vnode *a_vp; 2436 } */ *ap = v; 2437 PUFFS_MSG_VARS(vn, print); 2438 struct vnode *vp = ap->a_vp; 2439 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2440 struct puffs_node *pn = vp->v_data; 2441 2442 /* kernel portion */ 2443 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2444 "\tuserspace cookie: %p", vp, pn, pn->pn_cookie); 2445 if (vp->v_type == VFIFO) 2446 VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); 2447 printf("\n"); 2448 2449 /* userspace portion */ 2450 if (EXISTSOP(pmp, PRINT)) { 2451 PUFFS_MSG_ALLOC(vn, print); 2452 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2453 PUFFS_VN_PRINT, VPTOPNC(vp)); 2454 PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, 2455 NULL); 2456 PUFFS_MSG_RELEASE(print); 2457 } 2458 2459 return 0; 2460 } 2461 2462 int 2463 puffs_vnop_pathconf(void *v) 2464 { 2465 struct vop_pathconf_args /* { 2466 const struct vnodeop_desc *a_desc; 2467 struct vnode *a_vp; 2468 int a_name; 2469 register_t *a_retval; 2470 } */ *ap = v; 2471 PUFFS_MSG_VARS(vn, pathconf); 2472 struct vnode *vp = ap->a_vp; 2473 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2474 int error; 2475 2476 PUFFS_MSG_ALLOC(vn, pathconf); 2477 pathconf_msg->pvnr_name = ap->a_name; 2478 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2479 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2480 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2481 error = checkerr(pmp, error, __func__); 2482 if (!error) 2483 *ap->a_retval = pathconf_msg->pvnr_retval; 2484 PUFFS_MSG_RELEASE(pathconf); 2485 2486 return error; 2487 } 2488 2489 int 2490 puffs_vnop_advlock(void *v) 2491 { 2492 struct vop_advlock_args /* { 2493 const struct vnodeop_desc *a_desc; 2494 struct vnode *a_vp; 2495 void *a_id; 2496 int a_op; 2497 struct flock *a_fl; 2498 int a_flags; 2499 } */ *ap = v; 2500 PUFFS_MSG_VARS(vn, advlock); 2501 struct vnode *vp = ap->a_vp; 2502 struct puffs_node *pn = VPTOPP(vp); 2503 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2504 int error; 2505 2506 if (!EXISTSOP(pmp, ADVLOCK)) 2507 return lf_advlock(ap, &pn->pn_lockf, vp->v_size); 2508 2509 PUFFS_MSG_ALLOC(vn, advlock); 2510 (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, 2511 sizeof(advlock_msg->pvnr_fl)); 2512 advlock_msg->pvnr_id = ap->a_id; 2513 advlock_msg->pvnr_op = ap->a_op; 2514 advlock_msg->pvnr_flags = ap->a_flags; 2515 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2516 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2517 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2518 error = checkerr(pmp, error, __func__); 2519 PUFFS_MSG_RELEASE(advlock); 2520 2521 return error; 2522 } 2523 2524 int 2525 puffs_vnop_abortop(void *v) 2526 { 2527 struct vop_abortop_args /* { 2528 struct vnode *a_dvp; 2529 struct componentname *a_cnp; 2530 }; */ *ap = v; 2531 PUFFS_MSG_VARS(vn, abortop); 2532 struct vnode *dvp = ap->a_dvp; 2533 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2534 struct componentname *cnp = ap->a_cnp; 2535 2536 if (EXISTSOP(pmp, ABORTOP)) { 2537 PUFFS_MSG_ALLOC(vn, abortop); 2538 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2539 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2540 puffs_msg_setfaf(park_abortop); 2541 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2542 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2543 2544 puffs_msg_enqueue(pmp, park_abortop); 2545 PUFFS_MSG_RELEASE(abortop); 2546 } 2547 2548 return genfs_abortop(v); 2549 } 2550 2551 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2552 2553 /* 2554 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2555 */ 2556 int 2557 puffs_vnop_strategy(void *v) 2558 { 2559 struct vop_strategy_args /* { 2560 const struct vnodeop_desc *a_desc; 2561 struct vnode *a_vp; 2562 struct buf *a_bp; 2563 } */ *ap = v; 2564 PUFFS_MSG_VARS(vn, rw); 2565 struct vnode *vp = ap->a_vp; 2566 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2567 struct puffs_node *pn; 2568 struct buf *bp; 2569 size_t argsize; 2570 size_t tomove, moved; 2571 int error, dofaf, cansleep, dobiodone; 2572 2573 pmp = MPTOPUFFSMP(vp->v_mount); 2574 bp = ap->a_bp; 2575 error = 0; 2576 dofaf = 0; 2577 cansleep = 0; 2578 pn = VPTOPP(vp); 2579 park_rw = NULL; /* explicit */ 2580 dobiodone = 1; 2581 2582 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2583 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2584 ERROUT(EOPNOTSUPP); 2585 2586 /* 2587 * Short-circuit optimization: don't flush buffer in between 2588 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2589 */ 2590 if (pn->pn_stat & PNODE_DYING) { 2591 KASSERT(BUF_ISWRITE(bp)); 2592 bp->b_resid = 0; 2593 goto out; 2594 } 2595 2596 #ifdef DIAGNOSTIC 2597 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2598 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2599 bp->b_bcount); 2600 #endif 2601 2602 /* 2603 * See explanation for the necessity of a FAF in puffs_fsync. 2604 * 2605 * Also, do FAF in case we're suspending. 2606 * See puffs_vfsops.c:pageflush() 2607 */ 2608 if (BUF_ISWRITE(bp)) { 2609 mutex_enter(vp->v_interlock); 2610 if (vdead_check(vp, VDEAD_NOWAIT) != 0) 2611 dofaf = 1; 2612 if (pn->pn_stat & PNODE_FAF) 2613 dofaf = 1; 2614 mutex_exit(vp->v_interlock); 2615 } 2616 2617 cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; 2618 2619 KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); 2620 2621 /* allocate transport structure */ 2622 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2623 argsize = sizeof(struct puffs_vnmsg_rw); 2624 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2625 (void *)&rw_msg, cansleep); 2626 if (error) 2627 goto out; 2628 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2629 2630 /* 2x2 cases: read/write, faf/nofaf */ 2631 if (BUF_ISREAD(bp)) { 2632 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2633 PUFFS_VN_READ, VPTOPNC(vp)); 2634 puffs_msg_setdelta(park_rw, tomove); 2635 if (BIOASYNC(bp)) { 2636 puffs_msg_setcall(park_rw, 2637 puffs_parkdone_asyncbioread, bp); 2638 puffs_msg_enqueue(pmp, park_rw); 2639 dobiodone = 0; 2640 } else { 2641 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2642 NULL, error); 2643 error = checkerr(pmp, error, __func__); 2644 if (error) 2645 goto out; 2646 2647 if (rw_msg->pvnr_resid > tomove) { 2648 puffs_senderr(pmp, PUFFS_ERR_READ, 2649 E2BIG, "resid grew", VPTOPNC(vp)); 2650 ERROUT(EPROTO); 2651 } 2652 2653 moved = tomove - rw_msg->pvnr_resid; 2654 2655 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2656 bp->b_resid = bp->b_bcount - moved; 2657 } 2658 } else { 2659 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2660 PUFFS_VN_WRITE, VPTOPNC(vp)); 2661 /* 2662 * make pages read-only before we write them if we want 2663 * write caching info 2664 */ 2665 if (PUFFS_WCACHEINFO(pmp)) { 2666 struct uvm_object *uobj = &vp->v_uobj; 2667 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2668 struct vm_page *vmp; 2669 int i; 2670 2671 for (i = 0; i < npages; i++) { 2672 vmp= uvm_pageratop((vaddr_t)bp->b_data 2673 + (i << PAGE_SHIFT)); 2674 DPRINTF(("puffs_strategy: write-protecting " 2675 "vp %p page %p, offset %" PRId64"\n", 2676 vp, vmp, vmp->offset)); 2677 mutex_enter(uobj->vmobjlock); 2678 vmp->flags |= PG_RDONLY; 2679 pmap_page_protect(vmp, VM_PROT_READ); 2680 mutex_exit(uobj->vmobjlock); 2681 } 2682 } 2683 2684 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2685 if (dofaf) { 2686 puffs_msg_setfaf(park_rw); 2687 } else if (BIOASYNC(bp)) { 2688 puffs_msg_setcall(park_rw, 2689 puffs_parkdone_asyncbiowrite, bp); 2690 dobiodone = 0; 2691 } 2692 2693 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2694 2695 if (dobiodone == 0) 2696 goto out; 2697 2698 /* 2699 * XXXXXXXX: wrong, but kernel can't survive strategy 2700 * failure currently. Here, have one more X: X. 2701 */ 2702 if (error != ENOMEM) 2703 error = 0; 2704 2705 error = checkerr(pmp, error, __func__); 2706 if (error) 2707 goto out; 2708 2709 if (rw_msg->pvnr_resid > tomove) { 2710 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2711 E2BIG, "resid grew", VPTOPNC(vp)); 2712 ERROUT(EPROTO); 2713 } 2714 2715 /* 2716 * FAF moved everything. Frankly, we don't 2717 * really have a choice. 2718 */ 2719 if (dofaf && error == 0) 2720 moved = tomove; 2721 else 2722 moved = tomove - rw_msg->pvnr_resid; 2723 2724 bp->b_resid = bp->b_bcount - moved; 2725 if (bp->b_resid != 0) { 2726 ERROUT(EIO); 2727 } 2728 } 2729 2730 out: 2731 if (park_rw) 2732 puffs_msgmem_release(park_rw); 2733 2734 if (error) 2735 bp->b_error = error; 2736 2737 if (error || dobiodone) 2738 biodone(bp); 2739 2740 return error; 2741 } 2742 2743 int 2744 puffs_vnop_mmap(void *v) 2745 { 2746 struct vop_mmap_args /* { 2747 const struct vnodeop_desc *a_desc; 2748 struct vnode *a_vp; 2749 vm_prot_t a_prot; 2750 kauth_cred_t a_cred; 2751 } */ *ap = v; 2752 PUFFS_MSG_VARS(vn, mmap); 2753 struct vnode *vp = ap->a_vp; 2754 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2755 int error; 2756 2757 if (!PUFFS_USE_PAGECACHE(pmp)) 2758 return genfs_eopnotsupp(v); 2759 2760 if (EXISTSOP(pmp, MMAP)) { 2761 PUFFS_MSG_ALLOC(vn, mmap); 2762 mmap_msg->pvnr_prot = ap->a_prot; 2763 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2764 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2765 PUFFS_VN_MMAP, VPTOPNC(vp)); 2766 2767 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2768 error = checkerr(pmp, error, __func__); 2769 PUFFS_MSG_RELEASE(mmap); 2770 } else { 2771 error = genfs_mmap(v); 2772 } 2773 2774 return error; 2775 } 2776 2777 2778 /* 2779 * The rest don't get a free trip to userspace and back, they 2780 * have to stay within the kernel. 2781 */ 2782 2783 /* 2784 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2785 * well, maybe somehow, somewhere, some day .... 2786 */ 2787 int 2788 puffs_vnop_bmap(void *v) 2789 { 2790 struct vop_bmap_args /* { 2791 const struct vnodeop_desc *a_desc; 2792 struct vnode *a_vp; 2793 daddr_t a_bn; 2794 struct vnode **a_vpp; 2795 daddr_t *a_bnp; 2796 int *a_runp; 2797 } */ *ap = v; 2798 struct puffs_mount *pmp; 2799 2800 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2801 2802 if (ap->a_vpp) 2803 *ap->a_vpp = ap->a_vp; 2804 if (ap->a_bnp) 2805 *ap->a_bnp = ap->a_bn; 2806 if (ap->a_runp) 2807 *ap->a_runp 2808 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2809 2810 return 0; 2811 } 2812 2813 /* 2814 * Handle getpages faults in puffs. We let genfs_getpages() do most 2815 * of the dirty work, but we come in this route to do accounting tasks. 2816 * If the user server has specified functions for cache notifications 2817 * about reads and/or writes, we record which type of operation we got, 2818 * for which page range, and proceed to issue a FAF notification to the 2819 * server about it. 2820 */ 2821 int 2822 puffs_vnop_getpages(void *v) 2823 { 2824 struct vop_getpages_args /* { 2825 const struct vnodeop_desc *a_desc; 2826 struct vnode *a_vp; 2827 voff_t a_offset; 2828 struct vm_page **a_m; 2829 int *a_count; 2830 int a_centeridx; 2831 vm_prot_t a_access_type; 2832 int a_advice; 2833 int a_flags; 2834 } */ *ap = v; 2835 struct puffs_mount *pmp; 2836 struct puffs_node *pn; 2837 struct vnode *vp; 2838 struct vm_page **pgs; 2839 struct puffs_cacheinfo *pcinfo = NULL; 2840 struct puffs_cacherun *pcrun; 2841 void *parkmem = NULL; 2842 size_t runsizes; 2843 int i, npages, si, streakon; 2844 int error, locked, write; 2845 2846 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2847 npages = *ap->a_count; 2848 pgs = ap->a_m; 2849 vp = ap->a_vp; 2850 pn = vp->v_data; 2851 locked = (ap->a_flags & PGO_LOCKED) != 0; 2852 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2853 2854 /* ccg xnaht - gets Wuninitialized wrong */ 2855 pcrun = NULL; 2856 runsizes = 0; 2857 2858 /* 2859 * Check that we aren't trying to fault in pages which our file 2860 * server doesn't know about. This happens if we extend a file by 2861 * skipping some pages and later try to fault in pages which 2862 * are between pn_serversize and vp_size. This check optimizes 2863 * away the common case where a file is being extended. 2864 */ 2865 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2866 struct vattr va; 2867 2868 /* try again later when we can block */ 2869 if (locked) 2870 ERROUT(EBUSY); 2871 2872 mutex_exit(vp->v_interlock); 2873 vattr_null(&va); 2874 va.va_size = vp->v_size; 2875 error = dosetattr(vp, &va, FSCRED, 0); 2876 if (error) 2877 ERROUT(error); 2878 mutex_enter(vp->v_interlock); 2879 } 2880 2881 if (write && PUFFS_WCACHEINFO(pmp)) { 2882 #ifdef notnowjohn 2883 /* allocate worst-case memory */ 2884 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2885 KASSERT(curlwp != uvm.pagedaemon_lwp || locked); 2886 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2887 locked ? KM_NOSLEEP : KM_SLEEP); 2888 2889 /* 2890 * can't block if we're locked and can't mess up caching 2891 * information for fs server. so come back later, please 2892 */ 2893 if (pcinfo == NULL) 2894 ERROUT(ENOMEM); 2895 2896 parkmem = puffs_park_alloc(locked == 0); 2897 if (parkmem == NULL) 2898 ERROUT(ENOMEM); 2899 2900 pcrun = pcinfo->pcache_runs; 2901 #else 2902 (void)parkmem; 2903 #endif 2904 } 2905 2906 error = genfs_getpages(v); 2907 if (error) 2908 goto out; 2909 2910 if (PUFFS_WCACHEINFO(pmp) == 0) 2911 goto out; 2912 2913 /* 2914 * Let's see whose fault it was and inform the user server of 2915 * possibly read/written pages. Map pages from read faults 2916 * strictly read-only, since otherwise we might miss info on 2917 * when the page is actually write-faulted to. 2918 */ 2919 if (!locked) 2920 mutex_enter(vp->v_uobj.vmobjlock); 2921 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2922 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2923 if (streakon && write) { 2924 streakon = 0; 2925 pcrun[si].pcache_runend 2926 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2927 si++; 2928 } 2929 continue; 2930 } 2931 if (streakon == 0 && write) { 2932 streakon = 1; 2933 pcrun[si].pcache_runstart = pgs[i]->offset; 2934 } 2935 2936 if (!write) 2937 pgs[i]->flags |= PG_RDONLY; 2938 } 2939 /* was the last page part of our streak? */ 2940 if (streakon) { 2941 pcrun[si].pcache_runend 2942 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2943 si++; 2944 } 2945 if (!locked) 2946 mutex_exit(vp->v_uobj.vmobjlock); 2947 2948 KASSERT(si <= (npages / 2) + 1); 2949 2950 #ifdef notnowjohn 2951 /* send results to userspace */ 2952 if (write) 2953 puffs_cacheop(pmp, parkmem, pcinfo, 2954 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2955 #endif 2956 2957 out: 2958 if (error) { 2959 if (pcinfo != NULL) 2960 kmem_free(pcinfo, 2961 sizeof(struct puffs_cacheinfo) + runsizes); 2962 #ifdef notnowjohn 2963 if (parkmem != NULL) 2964 puffs_park_release(parkmem, 1); 2965 #endif 2966 } 2967 2968 return error; 2969 } 2970 2971 /* 2972 * Extended attribute support. 2973 */ 2974 2975 int 2976 puffs_vnop_getextattr(void *v) 2977 { 2978 struct vop_getextattr_args /* 2979 struct vnode *a_vp; 2980 int a_attrnamespace; 2981 const char *a_name; 2982 struct uio *a_uio; 2983 size_t *a_size; 2984 kauth_cred_t a_cred; 2985 }; */ *ap = v; 2986 PUFFS_MSG_VARS(vn, getextattr); 2987 struct vnode *vp = ap->a_vp; 2988 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2989 int attrnamespace = ap->a_attrnamespace; 2990 const char *name = ap->a_name; 2991 struct uio *uio = ap->a_uio; 2992 size_t *sizep = ap->a_size; 2993 size_t tomove, resid; 2994 int error; 2995 2996 if (uio) 2997 resid = uio->uio_resid; 2998 else 2999 resid = 0; 3000 3001 tomove = PUFFS_TOMOVE(resid, pmp); 3002 if (tomove != resid) { 3003 error = E2BIG; 3004 goto out; 3005 } 3006 3007 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, 3008 &park_getextattr, (void *)&getextattr_msg, 1); 3009 3010 getextattr_msg->pvnr_attrnamespace = attrnamespace; 3011 strlcpy(getextattr_msg->pvnr_attrname, name, 3012 sizeof(getextattr_msg->pvnr_attrname)); 3013 puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); 3014 if (sizep) 3015 getextattr_msg->pvnr_datasize = 1; 3016 getextattr_msg->pvnr_resid = tomove; 3017 3018 puffs_msg_setinfo(park_getextattr, 3019 PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); 3020 puffs_msg_setdelta(park_getextattr, tomove); 3021 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); 3022 3023 error = checkerr(pmp, error, __func__); 3024 if (error) 3025 goto out; 3026 3027 resid = getextattr_msg->pvnr_resid; 3028 if (resid > tomove) { 3029 puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, 3030 "resid grew", VPTOPNC(vp)); 3031 error = EPROTO; 3032 goto out; 3033 } 3034 3035 if (sizep) 3036 *sizep = getextattr_msg->pvnr_datasize; 3037 if (uio) 3038 error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); 3039 3040 out: 3041 PUFFS_MSG_RELEASE(getextattr); 3042 return error; 3043 } 3044 3045 int 3046 puffs_vnop_setextattr(void *v) 3047 { 3048 struct vop_setextattr_args /* { 3049 struct vnode *a_vp; 3050 int a_attrnamespace; 3051 const char *a_name; 3052 struct uio *a_uio; 3053 kauth_cred_t a_cred; 3054 }; */ *ap = v; 3055 PUFFS_MSG_VARS(vn, setextattr); 3056 struct vnode *vp = ap->a_vp; 3057 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3058 int attrnamespace = ap->a_attrnamespace; 3059 const char *name = ap->a_name; 3060 struct uio *uio = ap->a_uio; 3061 size_t tomove, resid; 3062 int error; 3063 3064 if (uio) 3065 resid = uio->uio_resid; 3066 else 3067 resid = 0; 3068 3069 tomove = PUFFS_TOMOVE(resid, pmp); 3070 if (tomove != resid) { 3071 error = E2BIG; 3072 goto out; 3073 } 3074 3075 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, 3076 &park_setextattr, (void *)&setextattr_msg, 1); 3077 3078 setextattr_msg->pvnr_attrnamespace = attrnamespace; 3079 strlcpy(setextattr_msg->pvnr_attrname, name, 3080 sizeof(setextattr_msg->pvnr_attrname)); 3081 puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); 3082 setextattr_msg->pvnr_resid = tomove; 3083 3084 if (uio) { 3085 error = uiomove(setextattr_msg->pvnr_data, tomove, uio); 3086 if (error) 3087 goto out; 3088 } 3089 3090 puffs_msg_setinfo(park_setextattr, 3091 PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); 3092 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); 3093 3094 error = checkerr(pmp, error, __func__); 3095 if (error) 3096 goto out; 3097 3098 if (setextattr_msg->pvnr_resid != 0) 3099 error = EIO; 3100 3101 out: 3102 PUFFS_MSG_RELEASE(setextattr); 3103 3104 return error; 3105 } 3106 3107 int 3108 puffs_vnop_listextattr(void *v) 3109 { 3110 struct vop_listextattr_args /* { 3111 struct vnode *a_vp; 3112 int a_attrnamespace; 3113 struct uio *a_uio; 3114 size_t *a_size; 3115 int a_flag, 3116 kauth_cred_t a_cred; 3117 }; */ *ap = v; 3118 PUFFS_MSG_VARS(vn, listextattr); 3119 struct vnode *vp = ap->a_vp; 3120 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3121 int attrnamespace = ap->a_attrnamespace; 3122 struct uio *uio = ap->a_uio; 3123 size_t *sizep = ap->a_size; 3124 int flag = ap->a_flag; 3125 size_t tomove, resid; 3126 int error; 3127 3128 if (uio) 3129 resid = uio->uio_resid; 3130 else 3131 resid = 0; 3132 3133 tomove = PUFFS_TOMOVE(resid, pmp); 3134 if (tomove != resid) { 3135 error = E2BIG; 3136 goto out; 3137 } 3138 3139 puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, 3140 &park_listextattr, (void *)&listextattr_msg, 1); 3141 3142 listextattr_msg->pvnr_attrnamespace = attrnamespace; 3143 listextattr_msg->pvnr_flag = flag; 3144 puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); 3145 listextattr_msg->pvnr_resid = tomove; 3146 if (sizep) 3147 listextattr_msg->pvnr_datasize = 1; 3148 3149 puffs_msg_setinfo(park_listextattr, 3150 PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); 3151 puffs_msg_setdelta(park_listextattr, tomove); 3152 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); 3153 3154 error = checkerr(pmp, error, __func__); 3155 if (error) 3156 goto out; 3157 3158 resid = listextattr_msg->pvnr_resid; 3159 if (resid > tomove) { 3160 puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, 3161 "resid grew", VPTOPNC(vp)); 3162 error = EPROTO; 3163 goto out; 3164 } 3165 3166 if (sizep) 3167 *sizep = listextattr_msg->pvnr_datasize; 3168 if (uio) 3169 error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); 3170 3171 out: 3172 PUFFS_MSG_RELEASE(listextattr); 3173 return error; 3174 } 3175 3176 int 3177 puffs_vnop_deleteextattr(void *v) 3178 { 3179 struct vop_deleteextattr_args /* { 3180 struct vnode *a_vp; 3181 int a_attrnamespace; 3182 const char *a_name; 3183 kauth_cred_t a_cred; 3184 }; */ *ap = v; 3185 PUFFS_MSG_VARS(vn, deleteextattr); 3186 struct vnode *vp = ap->a_vp; 3187 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 3188 int attrnamespace = ap->a_attrnamespace; 3189 const char *name = ap->a_name; 3190 int error; 3191 3192 PUFFS_MSG_ALLOC(vn, deleteextattr); 3193 deleteextattr_msg->pvnr_attrnamespace = attrnamespace; 3194 strlcpy(deleteextattr_msg->pvnr_attrname, name, 3195 sizeof(deleteextattr_msg->pvnr_attrname)); 3196 puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); 3197 3198 puffs_msg_setinfo(park_deleteextattr, 3199 PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); 3200 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, 3201 vp->v_data, NULL, error); 3202 3203 error = checkerr(pmp, error, __func__); 3204 3205 PUFFS_MSG_RELEASE(deleteextattr); 3206 return error; 3207 } 3208 3209 /* 3210 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 3211 * FAF update information for the puffs node first. 3212 */ 3213 int 3214 puffs_vnop_spec_read(void *v) 3215 { 3216 struct vop_read_args /* { 3217 const struct vnodeop_desc *a_desc; 3218 struct vnode *a_vp; 3219 struct uio *a_uio; 3220 int a_ioflag; 3221 kauth_cred_t a_cred; 3222 } */ *ap = v; 3223 3224 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3225 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 3226 } 3227 3228 int 3229 puffs_vnop_spec_write(void *v) 3230 { 3231 struct vop_write_args /* { 3232 const struct vnodeop_desc *a_desc; 3233 struct vnode *a_vp; 3234 struct uio *a_uio; 3235 int a_ioflag; 3236 kauth_cred_t a_cred; 3237 } */ *ap = v; 3238 3239 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3240 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 3241 } 3242 3243 int 3244 puffs_vnop_fifo_read(void *v) 3245 { 3246 struct vop_read_args /* { 3247 const struct vnodeop_desc *a_desc; 3248 struct vnode *a_vp; 3249 struct uio *a_uio; 3250 int a_ioflag; 3251 kauth_cred_t a_cred; 3252 } */ *ap = v; 3253 3254 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 3255 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 3256 } 3257 3258 int 3259 puffs_vnop_fifo_write(void *v) 3260 { 3261 struct vop_write_args /* { 3262 const struct vnodeop_desc *a_desc; 3263 struct vnode *a_vp; 3264 struct uio *a_uio; 3265 int a_ioflag; 3266 kauth_cred_t a_cred; 3267 } */ *ap = v; 3268 3269 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 3270 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 3271 } 3272
Indexes created Wed Oct 01 19:09:53 GMT 2025