| 1 | /* $NetBSD: puffs_vnops.c,v 1.205 2016/07/21 18:21:27 christos 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 1.205 2016/07/21 18:21:27 christos 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_fallocate(void *); |
| 77 | int puffs_vnop_fdiscard(void *); |
| 78 | int puffs_vnop_fcntl(void *); |
| 79 | int puffs_vnop_ioctl(void *); |
| 80 | int puffs_vnop_inactive(void *); |
| 81 | int puffs_vnop_print(void *); |
| 82 | int puffs_vnop_pathconf(void *); |
| 83 | int puffs_vnop_advlock(void *); |
| 84 | int puffs_vnop_strategy(void *); |
| 85 | int puffs_vnop_bmap(void *); |
| 86 | int puffs_vnop_mmap(void *); |
| 87 | int puffs_vnop_getpages(void *); |
| 88 | int puffs_vnop_abortop(void *); |
| 89 | int puffs_vnop_getextattr(void *); |
| 90 | int puffs_vnop_setextattr(void *); |
| 91 | int puffs_vnop_listextattr(void *); |
| 92 | int puffs_vnop_deleteextattr(void *); |
| 93 | |
| 94 | int puffs_vnop_spec_read(void *); |
| 95 | int puffs_vnop_spec_write(void *); |
| 96 | int puffs_vnop_fifo_read(void *); |
| 97 | int puffs_vnop_fifo_write(void *); |
| 98 | |
| 99 | int puffs_vnop_checkop(void *); |
| 100 | |
| 101 | #define puffs_vnop_lock genfs_lock |
| 102 | #define puffs_vnop_unlock genfs_unlock |
| 103 | #define puffs_vnop_islocked genfs_islocked |
| 104 | |
| 105 | int (**puffs_vnodeop_p)(void *); |
| 106 | const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { |
| 107 | { &vop_default_desc, vn_default_error }, |
| 108 | { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ |
| 109 | { &vop_create_desc, puffs_vnop_checkop }, /* create */ |
| 110 | { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ |
| 111 | { &vop_open_desc, puffs_vnop_open }, /* REAL open */ |
| 112 | { &vop_close_desc, puffs_vnop_checkop }, /* close */ |
| 113 | { &vop_access_desc, puffs_vnop_access }, /* REAL access */ |
| 114 | { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ |
| 115 | { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ |
| 116 | { &vop_read_desc, puffs_vnop_checkop }, /* read */ |
| 117 | { &vop_write_desc, puffs_vnop_checkop }, /* write */ |
| 118 | { &vop_fallocate_desc, puffs_vnop_fallocate }, /* fallocate */ |
| 119 | { &vop_fdiscard_desc, puffs_vnop_fdiscard }, /* fdiscard */ |
| 120 | { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ |
| 121 | { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ |
| 122 | { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ |
| 123 | { &vop_link_desc, puffs_vnop_checkop }, /* link */ |
| 124 | { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ |
| 125 | { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ |
| 126 | { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ |
| 127 | { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ |
| 128 | { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ |
| 129 | { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ |
| 130 | { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ |
| 131 | { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ |
| 132 | { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ |
| 133 | { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ |
| 134 | { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ |
| 135 | { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ |
| 136 | { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ |
| 137 | { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ |
| 138 | { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ |
| 139 | { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ |
| 140 | { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ |
| 141 | { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ |
| 142 | { &vop_print_desc, puffs_vnop_print }, /* REAL print */ |
| 143 | { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ |
| 144 | { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ |
| 145 | { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ |
| 146 | { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ |
| 147 | { &vop_getextattr_desc, puffs_vnop_getextattr }, /* getextattr */ |
| 148 | { &vop_setextattr_desc, puffs_vnop_setextattr }, /* setextattr */ |
| 149 | { &vop_listextattr_desc, puffs_vnop_listextattr }, /* listextattr */ |
| 150 | { &vop_deleteextattr_desc, puffs_vnop_deleteextattr },/* deleteextattr */ |
| 151 | #if 0 |
| 152 | { &vop_openextattr_desc, puffs_vnop_checkop }, /* openextattr */ |
| 153 | { &vop_closeextattr_desc, puffs_vnop_checkop }, /* closeextattr */ |
| 154 | #endif |
| 155 | { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ |
| 156 | { NULL, NULL } |
| 157 | }; |
| 158 | const struct vnodeopv_desc puffs_vnodeop_opv_desc = |
| 159 | { &puffs_vnodeop_p, puffs_vnodeop_entries }; |
| 160 | |
| 161 | |
| 162 | int (**puffs_specop_p)(void *); |
| 163 | const struct vnodeopv_entry_desc puffs_specop_entries[] = { |
| 164 | { &vop_default_desc, vn_default_error }, |
| 165 | { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ |
| 166 | { &vop_create_desc, spec_create }, /* genfs_badop */ |
| 167 | { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ |
| 168 | { &vop_open_desc, spec_open }, /* spec_open */ |
| 169 | { &vop_close_desc, spec_close }, /* spec_close */ |
| 170 | { &vop_access_desc, puffs_vnop_checkop }, /* access */ |
| 171 | { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ |
| 172 | { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ |
| 173 | { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ |
| 174 | { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ |
| 175 | { &vop_fallocate_desc, spec_fallocate }, /* fallocate */ |
| 176 | { &vop_fdiscard_desc, spec_fdiscard }, /* fdiscard */ |
| 177 | { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ |
| 178 | { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ |
| 179 | { &vop_poll_desc, spec_poll }, /* spec_poll */ |
| 180 | { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ |
| 181 | { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ |
| 182 | { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ |
| 183 | { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ |
| 184 | { &vop_seek_desc, spec_seek }, /* genfs_nullop */ |
| 185 | { &vop_remove_desc, spec_remove }, /* genfs_badop */ |
| 186 | { &vop_link_desc, spec_link }, /* genfs_badop */ |
| 187 | { &vop_rename_desc, spec_rename }, /* genfs_badop */ |
| 188 | { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ |
| 189 | { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ |
| 190 | { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ |
| 191 | { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ |
| 192 | { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ |
| 193 | { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ |
| 194 | { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ |
| 195 | { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ |
| 196 | { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ |
| 197 | { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ |
| 198 | { &vop_bmap_desc, spec_bmap }, /* dummy */ |
| 199 | { &vop_strategy_desc, spec_strategy }, /* dev strategy */ |
| 200 | { &vop_print_desc, puffs_vnop_print }, /* REAL print */ |
| 201 | { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ |
| 202 | { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ |
| 203 | { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ |
| 204 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 205 | { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ |
| 206 | { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ |
| 207 | { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ |
| 208 | { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ |
| 209 | { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ |
| 210 | { &vop_deleteextattr_desc, puffs_vnop_checkop },/* deleteextattr */ |
| 211 | #if 0 |
| 212 | { &vop_openextattr_desc, _openextattr }, /* openextattr */ |
| 213 | { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ |
| 214 | #endif |
| 215 | { NULL, NULL } |
| 216 | }; |
| 217 | const struct vnodeopv_desc puffs_specop_opv_desc = |
| 218 | { &puffs_specop_p, puffs_specop_entries }; |
| 219 | |
| 220 | |
| 221 | int (**puffs_fifoop_p)(void *); |
| 222 | const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { |
| 223 | { &vop_default_desc, vn_default_error }, |
| 224 | { &vop_lookup_desc, vn_fifo_bypass }, /* lookup, ENOTDIR */ |
| 225 | { &vop_create_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 226 | { &vop_mknod_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 227 | { &vop_open_desc, vn_fifo_bypass }, /* open */ |
| 228 | { &vop_close_desc, vn_fifo_bypass }, /* close */ |
| 229 | { &vop_access_desc, puffs_vnop_checkop }, /* access */ |
| 230 | { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ |
| 231 | { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ |
| 232 | { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ |
| 233 | { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ |
| 234 | { &vop_fallocate_desc, vn_fifo_bypass }, /* fallocate */ |
| 235 | { &vop_fdiscard_desc, vn_fifo_bypass }, /* fdiscard */ |
| 236 | { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */ |
| 237 | { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ |
| 238 | { &vop_poll_desc, vn_fifo_bypass }, /* poll */ |
| 239 | { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */ |
| 240 | { &vop_revoke_desc, vn_fifo_bypass }, /* genfs_revoke */ |
| 241 | { &vop_mmap_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 242 | { &vop_fsync_desc, vn_fifo_bypass }, /* genfs_nullop*/ |
| 243 | { &vop_seek_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 244 | { &vop_remove_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 245 | { &vop_link_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 246 | { &vop_rename_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 247 | { &vop_mkdir_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 248 | { &vop_rmdir_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 249 | { &vop_symlink_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 250 | { &vop_readdir_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 251 | { &vop_readlink_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 252 | { &vop_abortop_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 253 | { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ |
| 254 | { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ |
| 255 | { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ |
| 256 | { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ |
| 257 | { &vop_bmap_desc, vn_fifo_bypass }, /* dummy */ |
| 258 | { &vop_strategy_desc, vn_fifo_bypass }, /* genfs_badop */ |
| 259 | { &vop_print_desc, puffs_vnop_print }, /* REAL print */ |
| 260 | { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ |
| 261 | { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */ |
| 262 | { &vop_advlock_desc, vn_fifo_bypass }, /* genfs_einval */ |
| 263 | { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ |
| 264 | { &vop_putpages_desc, vn_fifo_bypass }, /* genfs_null_putpages*/ |
| 265 | #if 0 |
| 266 | { &vop_openextattr_desc, _openextattr }, /* openextattr */ |
| 267 | { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ |
| 268 | #endif |
| 269 | { &vop_getextattr_desc, puffs_vnop_checkop }, /* getextattr */ |
| 270 | { &vop_setextattr_desc, puffs_vnop_checkop }, /* setextattr */ |
| 271 | { &vop_listextattr_desc, puffs_vnop_checkop }, /* listextattr */ |
| 272 | { &vop_deleteextattr_desc, puffs_vnop_checkop }, /* deleteextattr */ |
| 273 | { NULL, NULL } |
| 274 | }; |
| 275 | const struct vnodeopv_desc puffs_fifoop_opv_desc = |
| 276 | { &puffs_fifoop_p, puffs_fifoop_entries }; |
| 277 | |
| 278 | |
| 279 | /* "real" vnode operations */ |
| 280 | int (**puffs_msgop_p)(void *); |
| 281 | const struct vnodeopv_entry_desc puffs_msgop_entries[] = { |
| 282 | { &vop_default_desc, vn_default_error }, |
| 283 | { &vop_create_desc, puffs_vnop_create }, /* create */ |
| 284 | { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ |
| 285 | { &vop_open_desc, puffs_vnop_open }, /* open */ |
| 286 | { &vop_close_desc, puffs_vnop_close }, /* close */ |
| 287 | { &vop_access_desc, puffs_vnop_access }, /* access */ |
| 288 | { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ |
| 289 | { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ |
| 290 | { &vop_read_desc, puffs_vnop_read }, /* read */ |
| 291 | { &vop_write_desc, puffs_vnop_write }, /* write */ |
| 292 | { &vop_seek_desc, puffs_vnop_seek }, /* seek */ |
| 293 | { &vop_remove_desc, puffs_vnop_remove }, /* remove */ |
| 294 | { &vop_link_desc, puffs_vnop_link }, /* link */ |
| 295 | { &vop_rename_desc, puffs_vnop_rename }, /* rename */ |
| 296 | { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ |
| 297 | { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ |
| 298 | { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ |
| 299 | { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ |
| 300 | { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ |
| 301 | { &vop_print_desc, puffs_vnop_print }, /* print */ |
| 302 | { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ |
| 303 | { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ |
| 304 | { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ |
| 305 | { NULL, NULL } |
| 306 | }; |
| 307 | const struct vnodeopv_desc puffs_msgop_opv_desc = |
| 308 | { &puffs_msgop_p, puffs_msgop_entries }; |
| 309 | |
| 310 | /* |
| 311 | * for dosetattr / update_va |
| 312 | */ |
| 313 | #define SETATTR_CHSIZE 0x01 |
| 314 | #define SETATTR_ASYNC 0x02 |
| 315 | |
| 316 | #define ERROUT(err) \ |
| 317 | do { \ |
| 318 | error = err; \ |
| 319 | goto out; \ |
| 320 | } while (/*CONSTCOND*/0) |
| 321 | |
| 322 | /* |
| 323 | * This is a generic vnode operation handler. It checks if the necessary |
| 324 | * operations for the called vnode operation are implemented by userspace |
| 325 | * and either returns a dummy return value or proceeds to call the real |
| 326 | * vnode operation from puffs_msgop_v. |
| 327 | * |
| 328 | * XXX: this should described elsewhere and autogenerated, the complexity |
| 329 | * of the vnode operations vectors and their interrelationships is also |
| 330 | * getting a bit out of hand. Another problem is that we need this same |
| 331 | * information in the fs server code, so keeping the two in sync manually |
| 332 | * is not a viable (long term) plan. |
| 333 | */ |
| 334 | |
| 335 | /* not supported, handle locking protocol */ |
| 336 | #define CHECKOP_NOTSUPP(op) \ |
| 337 | case VOP_##op##_DESCOFFSET: \ |
| 338 | if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ |
| 339 | return genfs_eopnotsupp(v); \ |
| 340 | break |
| 341 | |
| 342 | /* always succeed, no locking */ |
| 343 | #define CHECKOP_SUCCESS(op) \ |
| 344 | case VOP_##op##_DESCOFFSET: \ |
| 345 | if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ |
| 346 | return 0; \ |
| 347 | break |
| 348 | |
| 349 | int |
| 350 | puffs_vnop_checkop(void *v) |
| 351 | { |
| 352 | struct vop_generic_args /* { |
| 353 | struct vnodeop_desc *a_desc; |
| 354 | spooky mystery contents; |
| 355 | } */ *ap = v; |
| 356 | struct vnodeop_desc *desc = ap->a_desc; |
| 357 | struct puffs_mount *pmp; |
| 358 | struct vnode *vp; |
| 359 | int offset, rv; |
| 360 | |
| 361 | offset = ap->a_desc->vdesc_vp_offsets[0]; |
| 362 | #ifdef DIAGNOSTIC |
| 363 | if (offset == VDESC_NO_OFFSET) |
| 364 | panic("puffs_checkop: no vnode, why did you call me?" ); |
| 365 | #endif |
| 366 | vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); |
| 367 | pmp = MPTOPUFFSMP(vp->v_mount); |
| 368 | |
| 369 | DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n" , |
| 370 | ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); |
| 371 | |
| 372 | if (!ALLOPS(pmp)) { |
| 373 | switch (desc->vdesc_offset) { |
| 374 | CHECKOP_NOTSUPP(CREATE); |
| 375 | CHECKOP_NOTSUPP(MKNOD); |
| 376 | CHECKOP_NOTSUPP(GETATTR); |
| 377 | CHECKOP_NOTSUPP(SETATTR); |
| 378 | CHECKOP_NOTSUPP(READ); |
| 379 | CHECKOP_NOTSUPP(WRITE); |
| 380 | CHECKOP_NOTSUPP(FCNTL); |
| 381 | CHECKOP_NOTSUPP(IOCTL); |
| 382 | CHECKOP_NOTSUPP(REMOVE); |
| 383 | CHECKOP_NOTSUPP(LINK); |
| 384 | CHECKOP_NOTSUPP(RENAME); |
| 385 | CHECKOP_NOTSUPP(MKDIR); |
| 386 | CHECKOP_NOTSUPP(RMDIR); |
| 387 | CHECKOP_NOTSUPP(SYMLINK); |
| 388 | CHECKOP_NOTSUPP(READDIR); |
| 389 | CHECKOP_NOTSUPP(READLINK); |
| 390 | CHECKOP_NOTSUPP(PRINT); |
| 391 | CHECKOP_NOTSUPP(PATHCONF); |
| 392 | CHECKOP_NOTSUPP(GETEXTATTR); |
| 393 | CHECKOP_NOTSUPP(SETEXTATTR); |
| 394 | CHECKOP_NOTSUPP(LISTEXTATTR); |
| 395 | CHECKOP_NOTSUPP(DELETEEXTATTR); |
| 396 | |
| 397 | CHECKOP_SUCCESS(ACCESS); |
| 398 | CHECKOP_SUCCESS(CLOSE); |
| 399 | CHECKOP_SUCCESS(SEEK); |
| 400 | |
| 401 | case VOP_GETPAGES_DESCOFFSET: |
| 402 | if (!EXISTSOP(pmp, READ)) |
| 403 | return genfs_eopnotsupp(v); |
| 404 | break; |
| 405 | |
| 406 | default: |
| 407 | panic("puffs_checkop: unhandled vnop %d" , |
| 408 | desc->vdesc_offset); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); |
| 413 | |
| 414 | DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n" , |
| 415 | ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); |
| 416 | |
| 417 | return rv; |
| 418 | } |
| 419 | |
| 420 | static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, |
| 421 | struct componentname *); |
| 422 | static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, |
| 423 | struct componentname *); |
| 424 | static void callinactive(struct puffs_mount *, puffs_cookie_t, int); |
| 425 | static void callreclaim(struct puffs_mount *, puffs_cookie_t, int); |
| 426 | static int flushvncache(struct vnode *, off_t, off_t, bool); |
| 427 | static void update_va(struct vnode *, struct vattr *, struct vattr *, |
| 428 | struct timespec *, struct timespec *, int); |
| 429 | static void update_parent(struct vnode *, struct vnode *); |
| 430 | |
| 431 | |
| 432 | #define PUFFS_ABORT_LOOKUP 1 |
| 433 | #define PUFFS_ABORT_CREATE 2 |
| 434 | #define PUFFS_ABORT_MKNOD 3 |
| 435 | #define PUFFS_ABORT_MKDIR 4 |
| 436 | #define PUFFS_ABORT_SYMLINK 5 |
| 437 | |
| 438 | /* |
| 439 | * Press the pani^Wabort button! Kernel resource allocation failed. |
| 440 | */ |
| 441 | static void |
| 442 | puffs_abortbutton(struct puffs_mount *pmp, int what, |
| 443 | puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) |
| 444 | { |
| 445 | |
| 446 | switch (what) { |
| 447 | case PUFFS_ABORT_CREATE: |
| 448 | case PUFFS_ABORT_MKNOD: |
| 449 | case PUFFS_ABORT_SYMLINK: |
| 450 | callremove(pmp, dck, ck, cnp); |
| 451 | break; |
| 452 | case PUFFS_ABORT_MKDIR: |
| 453 | callrmdir(pmp, dck, ck, cnp); |
| 454 | break; |
| 455 | } |
| 456 | |
| 457 | callinactive(pmp, ck, 0); |
| 458 | callreclaim(pmp, ck, 1); |
| 459 | } |
| 460 | |
| 461 | /* |
| 462 | * Begin vnode operations. |
| 463 | * |
| 464 | * A word from the keymaster about locks: generally we don't want |
| 465 | * to use the vnode locks at all: it creates an ugly dependency between |
| 466 | * the userlandia file server and the kernel. But we'll play along with |
| 467 | * the kernel vnode locks for now. However, even currently we attempt |
| 468 | * to release locks as early as possible. This is possible for some |
| 469 | * operations which a) don't need a locked vnode after the userspace op |
| 470 | * and b) return with the vnode unlocked. Theoretically we could |
| 471 | * unlock-do op-lock for others and order the graph in userspace, but I |
| 472 | * don't want to think of the consequences for the time being. |
| 473 | */ |
| 474 | |
| 475 | #define TTL_TO_TIMEOUT(ts) \ |
| 476 | (hardclock_ticks + (ts->tv_sec * hz) + (ts->tv_nsec * hz / 1000000000)) |
| 477 | #define TTL_VALID(ts) \ |
| 478 | ((ts != NULL) && !((ts->tv_sec == 0) && (ts->tv_nsec == 0))) |
| 479 | #define TIMED_OUT(expire) \ |
| 480 | ((int)((unsigned int)hardclock_ticks - (unsigned int)expire) > 0) |
| 481 | int |
| 482 | puffs_vnop_lookup(void *v) |
| 483 | { |
| 484 | struct vop_lookup_v2_args /* { |
| 485 | const struct vnodeop_desc *a_desc; |
| 486 | struct vnode *a_dvp; |
| 487 | struct vnode **a_vpp; |
| 488 | struct componentname *a_cnp; |
| 489 | } */ *ap = v; |
| 490 | PUFFS_MSG_VARS(vn, lookup); |
| 491 | struct puffs_mount *pmp; |
| 492 | struct componentname *cnp; |
| 493 | struct vnode *vp, *dvp, *cvp; |
| 494 | struct puffs_node *dpn, *cpn; |
| 495 | int isdot; |
| 496 | int error; |
| 497 | |
| 498 | pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); |
| 499 | cnp = ap->a_cnp; |
| 500 | dvp = ap->a_dvp; |
| 501 | cvp = NULL; |
| 502 | cpn = NULL; |
| 503 | *ap->a_vpp = NULL; |
| 504 | |
| 505 | /* r/o fs? we check create later to handle EEXIST */ |
| 506 | if ((cnp->cn_flags & ISLASTCN) |
| 507 | && (dvp->v_mount->mnt_flag & MNT_RDONLY) |
| 508 | && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) |
| 509 | return EROFS; |
| 510 | |
| 511 | isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; |
| 512 | |
| 513 | DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n" , |
| 514 | cnp->cn_nameptr, dvp, cnp->cn_nameiop)); |
| 515 | |
| 516 | /* |
| 517 | * If dotdot cache is enabled, add reference to .. and return. |
| 518 | */ |
| 519 | if (PUFFS_USE_DOTDOTCACHE(pmp) && (cnp->cn_flags & ISDOTDOT)) { |
| 520 | vp = VPTOPP(ap->a_dvp)->pn_parent; |
| 521 | vref(vp); |
| 522 | |
| 523 | *ap->a_vpp = vp; |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * Check if someone fed it into the cache |
| 529 | */ |
| 530 | if (!isdot && PUFFS_USE_NAMECACHE(pmp)) { |
| 531 | int found, iswhiteout; |
| 532 | |
| 533 | found = cache_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, |
| 534 | cnp->cn_nameiop, cnp->cn_flags, |
| 535 | &iswhiteout, ap->a_vpp); |
| 536 | if (iswhiteout) { |
| 537 | cnp->cn_flags |= ISWHITEOUT; |
| 538 | } |
| 539 | |
| 540 | if (found && *ap->a_vpp != NULLVP && PUFFS_USE_FS_TTL(pmp)) { |
| 541 | cvp = *ap->a_vpp; |
| 542 | cpn = VPTOPP(cvp); |
| 543 | |
| 544 | if (TIMED_OUT(cpn->pn_cn_timeout)) { |
| 545 | cache_purge(cvp); |
| 546 | /* |
| 547 | * cached vnode (cvp) is still referenced |
| 548 | * so that we can reuse it upon a new |
| 549 | * successful lookup. |
| 550 | */ |
| 551 | *ap->a_vpp = NULL; |
| 552 | found = 0; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Do not use negative caching, since the filesystem |
| 558 | * provides no TTL for it. |
| 559 | */ |
| 560 | if (found && *ap->a_vpp == NULLVP && PUFFS_USE_FS_TTL(pmp)) |
| 561 | found = 0; |
| 562 | |
| 563 | if (found) { |
| 564 | return *ap->a_vpp == NULLVP ? ENOENT : 0; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * This is what would have been left in ERROR before |
| 569 | * the rearrangement of cache_lookup(). What with all |
| 570 | * the macros, I am not sure if this is a dead value |
| 571 | * below or not. |
| 572 | */ |
| 573 | error = -1; |
| 574 | } |
| 575 | |
| 576 | if (isdot) { |
| 577 | /* deal with rename lookup semantics */ |
| 578 | if (cnp->cn_nameiop == RENAME && (cnp->cn_flags & ISLASTCN)) |
| 579 | return EISDIR; |
| 580 | |
| 581 | vp = ap->a_dvp; |
| 582 | vref(vp); |
| 583 | *ap->a_vpp = vp; |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | if (cvp != NULL) { |
| 588 | if (vn_lock(cvp, LK_EXCLUSIVE) != 0) { |
| 589 | vrele(cvp); |
| 590 | cvp = NULL; |
| 591 | } else |
| 592 | mutex_enter(&cpn->pn_sizemtx); |
| 593 | } |
| 594 | |
| 595 | PUFFS_MSG_ALLOC(vn, lookup); |
| 596 | puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, |
| 597 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 598 | |
| 599 | if (cnp->cn_flags & ISDOTDOT) |
| 600 | VOP_UNLOCK(dvp); |
| 601 | |
| 602 | puffs_msg_setinfo(park_lookup, PUFFSOP_VN, |
| 603 | PUFFS_VN_LOOKUP, VPTOPNC(dvp)); |
| 604 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); |
| 605 | DPRINTF(("puffs_lookup: return of the userspace, part %d\n" , error)); |
| 606 | |
| 607 | /* |
| 608 | * In case of error, there is no new vnode to play with, so be |
| 609 | * happy with the NULL value given to vpp in the beginning. |
| 610 | * Also, check if this really was an error or the target was not |
| 611 | * present. Either treat it as a non-error for CREATE/RENAME or |
| 612 | * enter the component into the negative name cache (if desired). |
| 613 | */ |
| 614 | if (error) { |
| 615 | error = checkerr(pmp, error, __func__); |
| 616 | if (error == ENOENT) { |
| 617 | /* don't allow to create files on r/o fs */ |
| 618 | if ((dvp->v_mount->mnt_flag & MNT_RDONLY) |
| 619 | && cnp->cn_nameiop == CREATE) { |
| 620 | error = EROFS; |
| 621 | |
| 622 | /* adjust values if we are creating */ |
| 623 | } else if ((cnp->cn_flags & ISLASTCN) |
| 624 | && (cnp->cn_nameiop == CREATE |
| 625 | || cnp->cn_nameiop == RENAME)) { |
| 626 | error = EJUSTRETURN; |
| 627 | |
| 628 | /* save negative cache entry */ |
| 629 | } else { |
| 630 | if (PUFFS_USE_NAMECACHE(pmp) && |
| 631 | !PUFFS_USE_FS_TTL(pmp)) |
| 632 | cache_enter(dvp, NULL, cnp->cn_nameptr, |
| 633 | cnp->cn_namelen, cnp->cn_flags); |
| 634 | } |
| 635 | } |
| 636 | goto out; |
| 637 | } |
| 638 | |
| 639 | /* |
| 640 | * Check that we don't get our parent node back, that would cause |
| 641 | * a pretty obvious deadlock. |
| 642 | */ |
| 643 | dpn = dvp->v_data; |
| 644 | if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { |
| 645 | puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, |
| 646 | "lookup produced parent cookie" , lookup_msg->pvnr_newnode); |
| 647 | error = EPROTO; |
| 648 | goto out; |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * Check if we looked up the cached vnode |
| 653 | */ |
| 654 | vp = NULL; |
| 655 | if (cvp && (VPTOPP(cvp)->pn_cookie == lookup_msg->pvnr_newnode)) { |
| 656 | int grace; |
| 657 | |
| 658 | /* |
| 659 | * Bump grace time of this node so that it does not get |
| 660 | * reclaimed too fast. We try to increase a bit more the |
| 661 | * lifetime of busiest * nodes - with some limits. |
| 662 | */ |
| 663 | grace = 10 * puffs_sopreq_expire_timeout; |
| 664 | cpn->pn_cn_grace = hardclock_ticks + grace; |
| 665 | vp = cvp; |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * No cached vnode available, or the cached vnode does not |
| 670 | * match the userland cookie anymore: is the node known? |
| 671 | */ |
| 672 | if (vp == NULL) { |
| 673 | error = puffs_getvnode(dvp->v_mount, |
| 674 | lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, |
| 675 | lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); |
| 676 | if (error) { |
| 677 | puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, |
| 678 | VPTOPNC(dvp), lookup_msg->pvnr_newnode, |
| 679 | ap->a_cnp); |
| 680 | goto out; |
| 681 | } |
| 682 | |
| 683 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * Update cache and TTL |
| 688 | */ |
| 689 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 690 | struct timespec *va_ttl = &lookup_msg->pvnr_va_ttl; |
| 691 | struct timespec *cn_ttl = &lookup_msg->pvnr_cn_ttl; |
| 692 | update_va(vp, NULL, &lookup_msg->pvnr_va, |
| 693 | va_ttl, cn_ttl, SETATTR_CHSIZE); |
| 694 | } |
| 695 | |
| 696 | KASSERT(lookup_msg->pvnr_newnode == VPTOPP(vp)->pn_cookie); |
| 697 | *ap->a_vpp = vp; |
| 698 | |
| 699 | if (PUFFS_USE_NAMECACHE(pmp)) |
| 700 | cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, |
| 701 | cnp->cn_flags); |
| 702 | |
| 703 | /* XXX */ |
| 704 | if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) |
| 705 | cnp->cn_flags &= ~REQUIREDIR; |
| 706 | if (lookup_msg->pvnr_cn.pkcn_consume) |
| 707 | cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, |
| 708 | strlen(cnp->cn_nameptr) - cnp->cn_namelen); |
| 709 | |
| 710 | VPTOPP(vp)->pn_nlookup++; |
| 711 | |
| 712 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 713 | (VPTOPP(vp)->pn_parent != dvp)) |
| 714 | update_parent(vp, dvp); |
| 715 | |
| 716 | out: |
| 717 | if (cvp != NULL) { |
| 718 | mutex_exit(&cpn->pn_sizemtx); |
| 719 | |
| 720 | if (error || (cvp != vp)) |
| 721 | vput(cvp); |
| 722 | } |
| 723 | if (error == 0) |
| 724 | VOP_UNLOCK(*ap->a_vpp); |
| 725 | |
| 726 | if (cnp->cn_flags & ISDOTDOT) |
| 727 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
| 728 | |
| 729 | DPRINTF(("puffs_lookup: returning %d %p\n" , error, *ap->a_vpp)); |
| 730 | PUFFS_MSG_RELEASE(lookup); |
| 731 | return error; |
| 732 | } |
| 733 | |
| 734 | #define REFPN_AND_UNLOCKVP(a, b) \ |
| 735 | do { \ |
| 736 | mutex_enter(&b->pn_mtx); \ |
| 737 | puffs_referencenode(b); \ |
| 738 | mutex_exit(&b->pn_mtx); \ |
| 739 | VOP_UNLOCK(a); \ |
| 740 | } while (/*CONSTCOND*/0) |
| 741 | |
| 742 | #define REFPN(b) \ |
| 743 | do { \ |
| 744 | mutex_enter(&b->pn_mtx); \ |
| 745 | puffs_referencenode(b); \ |
| 746 | mutex_exit(&b->pn_mtx); \ |
| 747 | } while (/*CONSTCOND*/0) |
| 748 | |
| 749 | #define RELEPN_AND_VP(a, b) \ |
| 750 | do { \ |
| 751 | puffs_releasenode(b); \ |
| 752 | vrele(a); \ |
| 753 | } while (/*CONSTCOND*/0) |
| 754 | |
| 755 | int |
| 756 | puffs_vnop_create(void *v) |
| 757 | { |
| 758 | struct vop_create_v3_args /* { |
| 759 | const struct vnodeop_desc *a_desc; |
| 760 | struct vnode *a_dvp; |
| 761 | struct vnode **a_vpp; |
| 762 | struct componentname *a_cnp; |
| 763 | struct vattr *a_vap; |
| 764 | } */ *ap = v; |
| 765 | PUFFS_MSG_VARS(vn, create); |
| 766 | struct vnode *dvp = ap->a_dvp; |
| 767 | struct puffs_node *dpn = VPTOPP(dvp); |
| 768 | struct componentname *cnp = ap->a_cnp; |
| 769 | struct mount *mp = dvp->v_mount; |
| 770 | struct puffs_mount *pmp = MPTOPUFFSMP(mp); |
| 771 | int error; |
| 772 | |
| 773 | DPRINTF(("puffs_create: dvp %p, cnp: %s\n" , |
| 774 | dvp, ap->a_cnp->cn_nameptr)); |
| 775 | |
| 776 | PUFFS_MSG_ALLOC(vn, create); |
| 777 | puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, |
| 778 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 779 | create_msg->pvnr_va = *ap->a_vap; |
| 780 | puffs_msg_setinfo(park_create, PUFFSOP_VN, |
| 781 | PUFFS_VN_CREATE, VPTOPNC(dvp)); |
| 782 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); |
| 783 | |
| 784 | error = checkerr(pmp, error, __func__); |
| 785 | if (error) |
| 786 | goto out; |
| 787 | |
| 788 | error = puffs_newnode(mp, dvp, ap->a_vpp, |
| 789 | create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); |
| 790 | if (error) { |
| 791 | puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, |
| 792 | create_msg->pvnr_newnode, cnp); |
| 793 | goto out; |
| 794 | } |
| 795 | |
| 796 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 797 | struct timespec *va_ttl = &create_msg->pvnr_va_ttl; |
| 798 | struct timespec *cn_ttl = &create_msg->pvnr_cn_ttl; |
| 799 | struct vattr *rvap = &create_msg->pvnr_va; |
| 800 | |
| 801 | update_va(*ap->a_vpp, NULL, rvap, |
| 802 | va_ttl, cn_ttl, SETATTR_CHSIZE); |
| 803 | } |
| 804 | |
| 805 | VPTOPP(*ap->a_vpp)->pn_nlookup++; |
| 806 | |
| 807 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 808 | (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) |
| 809 | update_parent(*ap->a_vpp, dvp); |
| 810 | |
| 811 | out: |
| 812 | DPRINTF(("puffs_create: return %d\n" , error)); |
| 813 | PUFFS_MSG_RELEASE(create); |
| 814 | return error; |
| 815 | } |
| 816 | |
| 817 | int |
| 818 | puffs_vnop_mknod(void *v) |
| 819 | { |
| 820 | struct vop_mknod_v3_args /* { |
| 821 | const struct vnodeop_desc *a_desc; |
| 822 | struct vnode *a_dvp; |
| 823 | struct vnode **a_vpp; |
| 824 | struct componentname *a_cnp; |
| 825 | struct vattr *a_vap; |
| 826 | } */ *ap = v; |
| 827 | PUFFS_MSG_VARS(vn, mknod); |
| 828 | struct vnode *dvp = ap->a_dvp; |
| 829 | struct puffs_node *dpn = VPTOPP(dvp); |
| 830 | struct componentname *cnp = ap->a_cnp; |
| 831 | struct mount *mp = dvp->v_mount; |
| 832 | struct puffs_mount *pmp = MPTOPUFFSMP(mp); |
| 833 | int error; |
| 834 | |
| 835 | PUFFS_MSG_ALLOC(vn, mknod); |
| 836 | puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, |
| 837 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 838 | mknod_msg->pvnr_va = *ap->a_vap; |
| 839 | puffs_msg_setinfo(park_mknod, PUFFSOP_VN, |
| 840 | PUFFS_VN_MKNOD, VPTOPNC(dvp)); |
| 841 | |
| 842 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); |
| 843 | |
| 844 | error = checkerr(pmp, error, __func__); |
| 845 | if (error) |
| 846 | goto out; |
| 847 | |
| 848 | error = puffs_newnode(mp, dvp, ap->a_vpp, |
| 849 | mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, |
| 850 | ap->a_vap->va_rdev); |
| 851 | if (error) { |
| 852 | puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, |
| 853 | mknod_msg->pvnr_newnode, cnp); |
| 854 | goto out; |
| 855 | } |
| 856 | |
| 857 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 858 | struct timespec *va_ttl = &mknod_msg->pvnr_va_ttl; |
| 859 | struct timespec *cn_ttl = &mknod_msg->pvnr_cn_ttl; |
| 860 | struct vattr *rvap = &mknod_msg->pvnr_va; |
| 861 | |
| 862 | update_va(*ap->a_vpp, NULL, rvap, |
| 863 | va_ttl, cn_ttl, SETATTR_CHSIZE); |
| 864 | } |
| 865 | |
| 866 | VPTOPP(*ap->a_vpp)->pn_nlookup++; |
| 867 | |
| 868 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 869 | (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) |
| 870 | update_parent(*ap->a_vpp, dvp); |
| 871 | |
| 872 | out: |
| 873 | PUFFS_MSG_RELEASE(mknod); |
| 874 | return error; |
| 875 | } |
| 876 | |
| 877 | int |
| 878 | puffs_vnop_open(void *v) |
| 879 | { |
| 880 | struct vop_open_args /* { |
| 881 | const struct vnodeop_desc *a_desc; |
| 882 | struct vnode *a_vp; |
| 883 | int a_mode; |
| 884 | kauth_cred_t a_cred; |
| 885 | } */ *ap = v; |
| 886 | PUFFS_MSG_VARS(vn, open); |
| 887 | struct vnode *vp = ap->a_vp; |
| 888 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 889 | struct puffs_node *pn = VPTOPP(vp); |
| 890 | int mode = ap->a_mode; |
| 891 | int error; |
| 892 | |
| 893 | DPRINTF(("puffs_open: vp %p, mode 0x%x\n" , vp, mode)); |
| 894 | |
| 895 | if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) |
| 896 | ERROUT(EROFS); |
| 897 | |
| 898 | if (!EXISTSOP(pmp, OPEN)) |
| 899 | ERROUT(0); |
| 900 | |
| 901 | PUFFS_MSG_ALLOC(vn, open); |
| 902 | open_msg->pvnr_mode = mode; |
| 903 | puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); |
| 904 | puffs_msg_setinfo(park_open, PUFFSOP_VN, |
| 905 | PUFFS_VN_OPEN, VPTOPNC(vp)); |
| 906 | |
| 907 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); |
| 908 | error = checkerr(pmp, error, __func__); |
| 909 | |
| 910 | if (open_msg->pvnr_oflags & PUFFS_OPEN_IO_DIRECT) { |
| 911 | /* |
| 912 | * Flush cache: |
| 913 | * - we do not want to discard cached write by direct write |
| 914 | * - read cache is now useless and should be freed |
| 915 | */ |
| 916 | flushvncache(vp, 0, 0, true); |
| 917 | if (mode & FREAD) |
| 918 | pn->pn_stat |= PNODE_RDIRECT; |
| 919 | if (mode & FWRITE) |
| 920 | pn->pn_stat |= PNODE_WDIRECT; |
| 921 | } |
| 922 | out: |
| 923 | DPRINTF(("puffs_open: returning %d\n" , error)); |
| 924 | PUFFS_MSG_RELEASE(open); |
| 925 | return error; |
| 926 | } |
| 927 | |
| 928 | int |
| 929 | puffs_vnop_close(void *v) |
| 930 | { |
| 931 | struct vop_close_args /* { |
| 932 | const struct vnodeop_desc *a_desc; |
| 933 | struct vnode *a_vp; |
| 934 | int a_fflag; |
| 935 | kauth_cred_t a_cred; |
| 936 | } */ *ap = v; |
| 937 | PUFFS_MSG_VARS(vn, close); |
| 938 | struct vnode *vp = ap->a_vp; |
| 939 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 940 | |
| 941 | PUFFS_MSG_ALLOC(vn, close); |
| 942 | puffs_msg_setfaf(park_close); |
| 943 | close_msg->pvnr_fflag = ap->a_fflag; |
| 944 | puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); |
| 945 | puffs_msg_setinfo(park_close, PUFFSOP_VN, |
| 946 | PUFFS_VN_CLOSE, VPTOPNC(vp)); |
| 947 | |
| 948 | puffs_msg_enqueue(pmp, park_close); |
| 949 | PUFFS_MSG_RELEASE(close); |
| 950 | return 0; |
| 951 | } |
| 952 | |
| 953 | int |
| 954 | puffs_vnop_access(void *v) |
| 955 | { |
| 956 | struct vop_access_args /* { |
| 957 | const struct vnodeop_desc *a_desc; |
| 958 | struct vnode *a_vp; |
| 959 | int a_mode; |
| 960 | kauth_cred_t a_cred; |
| 961 | } */ *ap = v; |
| 962 | PUFFS_MSG_VARS(vn, access); |
| 963 | struct vnode *vp = ap->a_vp; |
| 964 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 965 | int mode = ap->a_mode; |
| 966 | int error; |
| 967 | |
| 968 | if (mode & VWRITE) { |
| 969 | switch (vp->v_type) { |
| 970 | case VDIR: |
| 971 | case VLNK: |
| 972 | case VREG: |
| 973 | if ((vp->v_mount->mnt_flag & MNT_RDONLY) |
| 974 | || !EXISTSOP(pmp, WRITE)) |
| 975 | return EROFS; |
| 976 | break; |
| 977 | default: |
| 978 | break; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | if (!EXISTSOP(pmp, ACCESS)) |
| 983 | return 0; |
| 984 | |
| 985 | PUFFS_MSG_ALLOC(vn, access); |
| 986 | access_msg->pvnr_mode = ap->a_mode; |
| 987 | puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); |
| 988 | puffs_msg_setinfo(park_access, PUFFSOP_VN, |
| 989 | PUFFS_VN_ACCESS, VPTOPNC(vp)); |
| 990 | |
| 991 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); |
| 992 | error = checkerr(pmp, error, __func__); |
| 993 | PUFFS_MSG_RELEASE(access); |
| 994 | |
| 995 | return error; |
| 996 | } |
| 997 | |
| 998 | static void |
| 999 | update_va(struct vnode *vp, struct vattr *vap, struct vattr *rvap, |
| 1000 | struct timespec *va_ttl, struct timespec *cn_ttl, int flags) |
| 1001 | { |
| 1002 | struct puffs_node *pn = VPTOPP(vp); |
| 1003 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1004 | int use_metacache; |
| 1005 | |
| 1006 | if (TTL_VALID(cn_ttl)) { |
| 1007 | pn->pn_cn_timeout = TTL_TO_TIMEOUT(cn_ttl); |
| 1008 | pn->pn_cn_grace = MAX(pn->pn_cn_timeout, pn->pn_cn_grace); |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * Don't listen to the file server regarding special device |
| 1013 | * size info, the file server doesn't know anything about them. |
| 1014 | */ |
| 1015 | if (vp->v_type == VBLK || vp->v_type == VCHR) |
| 1016 | rvap->va_size = vp->v_size; |
| 1017 | |
| 1018 | /* Ditto for blocksize (ufs comment: this doesn't belong here) */ |
| 1019 | if (vp->v_type == VBLK) |
| 1020 | rvap->va_blocksize = BLKDEV_IOSIZE; |
| 1021 | else if (vp->v_type == VCHR) |
| 1022 | rvap->va_blocksize = MAXBSIZE; |
| 1023 | |
| 1024 | if (vap != NULL) { |
| 1025 | (void) memcpy(vap, rvap, sizeof(struct vattr)); |
| 1026 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; |
| 1027 | |
| 1028 | if (PUFFS_USE_METAFLUSH(pmp)) { |
| 1029 | if (pn->pn_stat & PNODE_METACACHE_ATIME) |
| 1030 | vap->va_atime = pn->pn_mc_atime; |
| 1031 | if (pn->pn_stat & PNODE_METACACHE_CTIME) |
| 1032 | vap->va_ctime = pn->pn_mc_ctime; |
| 1033 | if (pn->pn_stat & PNODE_METACACHE_MTIME) |
| 1034 | vap->va_mtime = pn->pn_mc_mtime; |
| 1035 | if (pn->pn_stat & PNODE_METACACHE_SIZE) |
| 1036 | vap->va_size = pn->pn_mc_size; |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | use_metacache = PUFFS_USE_METAFLUSH(pmp) && |
| 1041 | (pn->pn_stat & PNODE_METACACHE_SIZE); |
| 1042 | if (!use_metacache && (flags & SETATTR_CHSIZE)) { |
| 1043 | if (rvap->va_size != VNOVAL |
| 1044 | && vp->v_type != VBLK && vp->v_type != VCHR) { |
| 1045 | uvm_vnp_setsize(vp, rvap->va_size); |
| 1046 | pn->pn_serversize = rvap->va_size; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | if ((va_ttl != NULL) && TTL_VALID(va_ttl)) { |
| 1051 | if (pn->pn_va_cache == NULL) |
| 1052 | pn->pn_va_cache = pool_get(&puffs_vapool, PR_WAITOK); |
| 1053 | |
| 1054 | (void)memcpy(pn->pn_va_cache, rvap, sizeof(*rvap)); |
| 1055 | |
| 1056 | pn->pn_va_timeout = TTL_TO_TIMEOUT(va_ttl); |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | static void |
| 1061 | update_parent(struct vnode *vp, struct vnode *dvp) |
| 1062 | { |
| 1063 | struct puffs_node *pn = VPTOPP(vp); |
| 1064 | |
| 1065 | if (pn->pn_parent != NULL) { |
| 1066 | KASSERT(pn->pn_parent != dvp); |
| 1067 | vrele(pn->pn_parent); |
| 1068 | } |
| 1069 | |
| 1070 | vref(dvp); |
| 1071 | pn->pn_parent = dvp; |
| 1072 | } |
| 1073 | |
| 1074 | int |
| 1075 | puffs_vnop_getattr(void *v) |
| 1076 | { |
| 1077 | struct vop_getattr_args /* { |
| 1078 | const struct vnodeop_desc *a_desc; |
| 1079 | struct vnode *a_vp; |
| 1080 | struct vattr *a_vap; |
| 1081 | kauth_cred_t a_cred; |
| 1082 | } */ *ap = v; |
| 1083 | PUFFS_MSG_VARS(vn, getattr); |
| 1084 | struct vnode *vp = ap->a_vp; |
| 1085 | struct mount *mp = vp->v_mount; |
| 1086 | struct puffs_mount *pmp = MPTOPUFFSMP(mp); |
| 1087 | struct vattr *vap, *rvap; |
| 1088 | struct puffs_node *pn = VPTOPP(vp); |
| 1089 | struct timespec *va_ttl = NULL; |
| 1090 | int error = 0; |
| 1091 | |
| 1092 | /* |
| 1093 | * A lock is required so that we do not race with |
| 1094 | * setattr, write and fsync when changing vp->v_size. |
| 1095 | * This is critical, since setting a stall smaler value |
| 1096 | * triggers a file truncate in uvm_vnp_setsize(), which |
| 1097 | * most of the time means data corruption (a chunk of |
| 1098 | * data is replaced by zeroes). This can be removed if |
| 1099 | * we decide one day that VOP_GETATTR must operate on |
| 1100 | * a locked vnode. |
| 1101 | * |
| 1102 | * XXX Should be useless now that VOP_GETATTR has been |
| 1103 | * fixed to always require a shared lock at least. |
| 1104 | */ |
| 1105 | mutex_enter(&pn->pn_sizemtx); |
| 1106 | |
| 1107 | REFPN(pn); |
| 1108 | vap = ap->a_vap; |
| 1109 | |
| 1110 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 1111 | if (!TIMED_OUT(pn->pn_va_timeout)) { |
| 1112 | update_va(vp, vap, pn->pn_va_cache, |
| 1113 | NULL, NULL, SETATTR_CHSIZE); |
| 1114 | goto out2; |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | PUFFS_MSG_ALLOC(vn, getattr); |
| 1119 | vattr_null(&getattr_msg->pvnr_va); |
| 1120 | puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); |
| 1121 | puffs_msg_setinfo(park_getattr, PUFFSOP_VN, |
| 1122 | PUFFS_VN_GETATTR, VPTOPNC(vp)); |
| 1123 | |
| 1124 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); |
| 1125 | error = checkerr(pmp, error, __func__); |
| 1126 | if (error) |
| 1127 | goto out; |
| 1128 | |
| 1129 | rvap = &getattr_msg->pvnr_va; |
| 1130 | |
| 1131 | if (PUFFS_USE_FS_TTL(pmp)) |
| 1132 | va_ttl = &getattr_msg->pvnr_va_ttl; |
| 1133 | |
| 1134 | update_va(vp, vap, rvap, va_ttl, NULL, SETATTR_CHSIZE); |
| 1135 | |
| 1136 | out: |
| 1137 | PUFFS_MSG_RELEASE(getattr); |
| 1138 | |
| 1139 | out2: |
| 1140 | puffs_releasenode(pn); |
| 1141 | |
| 1142 | mutex_exit(&pn->pn_sizemtx); |
| 1143 | |
| 1144 | return error; |
| 1145 | } |
| 1146 | |
| 1147 | static void |
| 1148 | zerofill_lastpage(struct vnode *vp, voff_t off) |
| 1149 | { |
| 1150 | char zbuf[16384]; |
| 1151 | struct iovec iov; |
| 1152 | struct uio uio; |
| 1153 | vsize_t len; |
| 1154 | int error; |
| 1155 | |
| 1156 | if (trunc_page(off) == off) |
| 1157 | return; |
| 1158 | |
| 1159 | if (vp->v_writecount == 0) |
| 1160 | return; |
| 1161 | |
| 1162 | len = round_page(off) - off; |
| 1163 | KASSERT(len < sizeof(zbuf)); |
| 1164 | memset(zbuf, 0, len); |
| 1165 | |
| 1166 | iov.iov_base = zbuf; |
| 1167 | iov.iov_len = len; |
| 1168 | UIO_SETUP_SYSSPACE(&uio); |
| 1169 | uio.uio_iov = &iov; |
| 1170 | uio.uio_iovcnt = 1; |
| 1171 | uio.uio_offset = off; |
| 1172 | uio.uio_resid = len; |
| 1173 | uio.uio_rw = UIO_WRITE; |
| 1174 | |
| 1175 | error = ubc_uiomove(&vp->v_uobj, &uio, len, |
| 1176 | UVM_ADV_SEQUENTIAL, UBC_WRITE|UBC_UNMAP_FLAG(vp)); |
| 1177 | if (error) { |
| 1178 | DPRINTF(("zero-fill 0x%" PRIxVSIZE "@0x%" PRIx64 |
| 1179 | " failed: error = %d\n" , len, off, error)); |
| 1180 | } |
| 1181 | |
| 1182 | return; |
| 1183 | } |
| 1184 | |
| 1185 | static int |
| 1186 | dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int flags) |
| 1187 | { |
| 1188 | PUFFS_MSG_VARS(vn, setattr); |
| 1189 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1190 | struct puffs_node *pn = vp->v_data; |
| 1191 | vsize_t oldsize = vp->v_size; |
| 1192 | int error = 0; |
| 1193 | |
| 1194 | KASSERT(!(flags & SETATTR_CHSIZE) || mutex_owned(&pn->pn_sizemtx)); |
| 1195 | |
| 1196 | if ((vp->v_mount->mnt_flag & MNT_RDONLY) && |
| 1197 | (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL |
| 1198 | || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL |
| 1199 | || vap->va_mode != (mode_t)VNOVAL)) |
| 1200 | return EROFS; |
| 1201 | |
| 1202 | if ((vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1203 | && vp->v_type == VREG && vap->va_size != VNOVAL) |
| 1204 | return EROFS; |
| 1205 | |
| 1206 | /* |
| 1207 | * Flush metacache first. If we are called with some explicit |
| 1208 | * parameters, treat them as information overriding metacache |
| 1209 | * information. |
| 1210 | */ |
| 1211 | if (PUFFS_USE_METAFLUSH(pmp) && pn->pn_stat & PNODE_METACACHE_MASK) { |
| 1212 | if ((pn->pn_stat & PNODE_METACACHE_ATIME) |
| 1213 | && vap->va_atime.tv_sec == VNOVAL) |
| 1214 | vap->va_atime = pn->pn_mc_atime; |
| 1215 | if ((pn->pn_stat & PNODE_METACACHE_CTIME) |
| 1216 | && vap->va_ctime.tv_sec == VNOVAL) |
| 1217 | vap->va_ctime = pn->pn_mc_ctime; |
| 1218 | if ((pn->pn_stat & PNODE_METACACHE_MTIME) |
| 1219 | && vap->va_mtime.tv_sec == VNOVAL) |
| 1220 | vap->va_mtime = pn->pn_mc_mtime; |
| 1221 | if ((pn->pn_stat & PNODE_METACACHE_SIZE) |
| 1222 | && vap->va_size == VNOVAL) |
| 1223 | vap->va_size = pn->pn_mc_size; |
| 1224 | |
| 1225 | pn->pn_stat &= ~PNODE_METACACHE_MASK; |
| 1226 | } |
| 1227 | |
| 1228 | /* |
| 1229 | * Flush attribute cache so that another thread do |
| 1230 | * not get a stale value during the operation. |
| 1231 | */ |
| 1232 | if (PUFFS_USE_FS_TTL(pmp)) |
| 1233 | pn->pn_va_timeout = 0; |
| 1234 | |
| 1235 | PUFFS_MSG_ALLOC(vn, setattr); |
| 1236 | (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); |
| 1237 | puffs_credcvt(&setattr_msg->pvnr_cred, cred); |
| 1238 | puffs_msg_setinfo(park_setattr, PUFFSOP_VN, |
| 1239 | PUFFS_VN_SETATTR, VPTOPNC(vp)); |
| 1240 | if (flags & SETATTR_ASYNC) |
| 1241 | puffs_msg_setfaf(park_setattr); |
| 1242 | |
| 1243 | puffs_msg_enqueue(pmp, park_setattr); |
| 1244 | if ((flags & SETATTR_ASYNC) == 0) { |
| 1245 | error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL); |
| 1246 | |
| 1247 | if ((error == 0) && PUFFS_USE_FS_TTL(pmp)) { |
| 1248 | struct timespec *va_ttl = &setattr_msg->pvnr_va_ttl; |
| 1249 | struct vattr *rvap = &setattr_msg->pvnr_va; |
| 1250 | |
| 1251 | update_va(vp, NULL, rvap, va_ttl, NULL, flags); |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | PUFFS_MSG_RELEASE(setattr); |
| 1256 | if ((flags & SETATTR_ASYNC) == 0) { |
| 1257 | error = checkerr(pmp, error, __func__); |
| 1258 | if (error) |
| 1259 | return error; |
| 1260 | } else { |
| 1261 | error = 0; |
| 1262 | } |
| 1263 | |
| 1264 | if (vap->va_size != VNOVAL) { |
| 1265 | /* |
| 1266 | * If we truncated the file, make sure the data beyond |
| 1267 | * EOF in last page does not remain in cache, otherwise |
| 1268 | * if the file is later truncated to a larger size (creating |
| 1269 | * a hole), that area will not return zeroes as it |
| 1270 | * should. |
| 1271 | */ |
| 1272 | if ((flags & SETATTR_CHSIZE) && PUFFS_USE_PAGECACHE(pmp) && |
| 1273 | (vap->va_size < oldsize)) |
| 1274 | zerofill_lastpage(vp, vap->va_size); |
| 1275 | |
| 1276 | pn->pn_serversize = vap->va_size; |
| 1277 | if (flags & SETATTR_CHSIZE) |
| 1278 | uvm_vnp_setsize(vp, vap->va_size); |
| 1279 | } |
| 1280 | |
| 1281 | return 0; |
| 1282 | } |
| 1283 | |
| 1284 | int |
| 1285 | puffs_vnop_setattr(void *v) |
| 1286 | { |
| 1287 | struct vop_getattr_args /* { |
| 1288 | const struct vnodeop_desc *a_desc; |
| 1289 | struct vnode *a_vp; |
| 1290 | struct vattr *a_vap; |
| 1291 | kauth_cred_t a_cred; |
| 1292 | } */ *ap = v; |
| 1293 | struct puffs_node *pn = ap->a_vp->v_data; |
| 1294 | int error; |
| 1295 | |
| 1296 | mutex_enter(&pn->pn_sizemtx); |
| 1297 | error = dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, SETATTR_CHSIZE); |
| 1298 | mutex_exit(&pn->pn_sizemtx); |
| 1299 | |
| 1300 | return error; |
| 1301 | } |
| 1302 | |
| 1303 | static __inline int |
| 1304 | doinact(struct puffs_mount *pmp, int iaflag) |
| 1305 | { |
| 1306 | |
| 1307 | if (EXISTSOP(pmp, INACTIVE)) |
| 1308 | if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) |
| 1309 | if (iaflag || ALLOPS(pmp)) |
| 1310 | return 1; |
| 1311 | else |
| 1312 | return 0; |
| 1313 | else |
| 1314 | return 1; |
| 1315 | else |
| 1316 | return 0; |
| 1317 | } |
| 1318 | |
| 1319 | static void |
| 1320 | callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) |
| 1321 | { |
| 1322 | PUFFS_MSG_VARS(vn, inactive); |
| 1323 | |
| 1324 | if (doinact(pmp, iaflag)) { |
| 1325 | PUFFS_MSG_ALLOC(vn, inactive); |
| 1326 | puffs_msg_setinfo(park_inactive, PUFFSOP_VN, |
| 1327 | PUFFS_VN_INACTIVE, ck); |
| 1328 | PUFFS_MSG_ENQUEUEWAIT_NOERROR(pmp, park_inactive); |
| 1329 | PUFFS_MSG_RELEASE(inactive); |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | /* XXX: callinactive can't setback */ |
| 1334 | int |
| 1335 | puffs_vnop_inactive(void *v) |
| 1336 | { |
| 1337 | struct vop_inactive_args /* { |
| 1338 | const struct vnodeop_desc *a_desc; |
| 1339 | struct vnode *a_vp; |
| 1340 | } */ *ap = v; |
| 1341 | PUFFS_MSG_VARS(vn, inactive); |
| 1342 | struct vnode *vp = ap->a_vp; |
| 1343 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1344 | struct puffs_node *pnode; |
| 1345 | bool recycle = false; |
| 1346 | |
| 1347 | /* |
| 1348 | * When puffs_cookie2vnode() misses an entry, vcache_get() |
| 1349 | * creates a new node (puffs_vfsop_loadvnode being called to |
| 1350 | * initialize the PUFFS part), then it discovers it is VNON, |
| 1351 | * and tries to vrele() it. This leads us there, while the |
| 1352 | * cookie was stall and the node likely already reclaimed. |
| 1353 | */ |
| 1354 | if (vp->v_type == VNON) { |
| 1355 | VOP_UNLOCK(vp); |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
| 1359 | pnode = vp->v_data; |
| 1360 | mutex_enter(&pnode->pn_sizemtx); |
| 1361 | |
| 1362 | if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { |
| 1363 | flushvncache(vp, 0, 0, false); |
| 1364 | PUFFS_MSG_ALLOC(vn, inactive); |
| 1365 | puffs_msg_setinfo(park_inactive, PUFFSOP_VN, |
| 1366 | PUFFS_VN_INACTIVE, VPTOPNC(vp)); |
| 1367 | PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_inactive, vp->v_data, |
| 1368 | NULL); |
| 1369 | PUFFS_MSG_RELEASE(inactive); |
| 1370 | } |
| 1371 | pnode->pn_stat &= ~PNODE_DOINACT; |
| 1372 | |
| 1373 | /* |
| 1374 | * file server thinks it's gone? then don't be afraid care, |
| 1375 | * node's life was already all it would ever be |
| 1376 | */ |
| 1377 | if (pnode->pn_stat & PNODE_NOREFS) { |
| 1378 | pnode->pn_stat |= PNODE_DYING; |
| 1379 | recycle = true; |
| 1380 | } |
| 1381 | |
| 1382 | /* |
| 1383 | * Handle node TTL. |
| 1384 | * If grace has already timed out, make it reclaimed. |
| 1385 | * Otherwise, we queue its expiration by sop thread, so |
| 1386 | * that it does not remain for ages in the freelist, |
| 1387 | * holding memory in userspace, while we will have |
| 1388 | * to look it up again anyway. |
| 1389 | */ |
| 1390 | if (PUFFS_USE_FS_TTL(pmp) && !(vp->v_vflag & VV_ROOT) && !recycle) { |
| 1391 | bool incache = !TIMED_OUT(pnode->pn_cn_timeout); |
| 1392 | bool ingrace = !TIMED_OUT(pnode->pn_cn_grace); |
| 1393 | bool reclaimqueued = pnode->pn_stat & PNODE_SOPEXP; |
| 1394 | |
| 1395 | if (!incache && !ingrace && !reclaimqueued) { |
| 1396 | pnode->pn_stat |= PNODE_DYING; |
| 1397 | recycle = true; |
| 1398 | } |
| 1399 | |
| 1400 | if (!recycle && !reclaimqueued) { |
| 1401 | struct puffs_sopreq *psopr; |
| 1402 | int at = MAX(pnode->pn_cn_grace, pnode->pn_cn_timeout); |
| 1403 | |
| 1404 | KASSERT(curlwp != uvm.pagedaemon_lwp); |
| 1405 | psopr = kmem_alloc(sizeof(*psopr), KM_SLEEP); |
| 1406 | psopr->psopr_ck = VPTOPNC(pnode->pn_vp); |
| 1407 | psopr->psopr_sopreq = PUFFS_SOPREQ_EXPIRE; |
| 1408 | psopr->psopr_at = at; |
| 1409 | |
| 1410 | mutex_enter(&pmp->pmp_sopmtx); |
| 1411 | |
| 1412 | /* |
| 1413 | * If thread has disapeared, just give up. The |
| 1414 | * fs is being unmounted and the node will be |
| 1415 | * be reclaimed anyway. |
| 1416 | * |
| 1417 | * Otherwise, we queue the request but do not |
| 1418 | * immediatly signal the thread, as the node |
| 1419 | * has not been expired yet. |
| 1420 | */ |
| 1421 | if (pmp->pmp_sopthrcount == 0) { |
| 1422 | kmem_free(psopr, sizeof(*psopr)); |
| 1423 | } else { |
| 1424 | TAILQ_INSERT_TAIL(&pmp->pmp_sopnodereqs, |
| 1425 | psopr, psopr_entries); |
| 1426 | pnode->pn_stat |= PNODE_SOPEXP; |
| 1427 | } |
| 1428 | |
| 1429 | mutex_exit(&pmp->pmp_sopmtx); |
| 1430 | } |
| 1431 | } |
| 1432 | |
| 1433 | /* |
| 1434 | * Wipe direct I/O flags |
| 1435 | */ |
| 1436 | pnode->pn_stat &= ~(PNODE_RDIRECT|PNODE_WDIRECT); |
| 1437 | |
| 1438 | *ap->a_recycle = recycle; |
| 1439 | |
| 1440 | mutex_exit(&pnode->pn_sizemtx); |
| 1441 | VOP_UNLOCK(vp); |
| 1442 | |
| 1443 | return 0; |
| 1444 | } |
| 1445 | |
| 1446 | static void |
| 1447 | callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck, int nlookup) |
| 1448 | { |
| 1449 | PUFFS_MSG_VARS(vn, reclaim); |
| 1450 | |
| 1451 | if (!EXISTSOP(pmp, RECLAIM)) |
| 1452 | return; |
| 1453 | |
| 1454 | PUFFS_MSG_ALLOC(vn, reclaim); |
| 1455 | reclaim_msg->pvnr_nlookup = nlookup; |
| 1456 | puffs_msg_setfaf(park_reclaim); |
| 1457 | puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); |
| 1458 | |
| 1459 | puffs_msg_enqueue(pmp, park_reclaim); |
| 1460 | PUFFS_MSG_RELEASE(reclaim); |
| 1461 | return; |
| 1462 | } |
| 1463 | |
| 1464 | /* |
| 1465 | * always FAF, we don't really care if the server wants to fail to |
| 1466 | * reclaim the node or not |
| 1467 | */ |
| 1468 | int |
| 1469 | puffs_vnop_reclaim(void *v) |
| 1470 | { |
| 1471 | struct vop_reclaim_args /* { |
| 1472 | const struct vnodeop_desc *a_desc; |
| 1473 | struct vnode *a_vp; |
| 1474 | } */ *ap = v; |
| 1475 | struct vnode *vp = ap->a_vp; |
| 1476 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1477 | bool notifyserver = true; |
| 1478 | |
| 1479 | /* |
| 1480 | * first things first: check if someone is trying to reclaim the |
| 1481 | * root vnode. do not allow that to travel to userspace. |
| 1482 | * Note that we don't need to take the lock similarly to |
| 1483 | * puffs_root(), since there is only one of us. |
| 1484 | */ |
| 1485 | if (vp->v_vflag & VV_ROOT) { |
| 1486 | mutex_enter(&pmp->pmp_lock); |
| 1487 | KASSERT(pmp->pmp_root != NULL); |
| 1488 | pmp->pmp_root = NULL; |
| 1489 | mutex_exit(&pmp->pmp_lock); |
| 1490 | notifyserver = false; |
| 1491 | } |
| 1492 | |
| 1493 | /* |
| 1494 | * purge info from kernel before issueing FAF, since we |
| 1495 | * don't really know when we'll get around to it after |
| 1496 | * that and someone might race us into node creation |
| 1497 | */ |
| 1498 | mutex_enter(&pmp->pmp_lock); |
| 1499 | if (PUFFS_USE_NAMECACHE(pmp)) |
| 1500 | cache_purge(vp); |
| 1501 | mutex_exit(&pmp->pmp_lock); |
| 1502 | |
| 1503 | if (notifyserver) { |
| 1504 | int nlookup = VPTOPP(vp)->pn_nlookup; |
| 1505 | |
| 1506 | callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), nlookup); |
| 1507 | } |
| 1508 | |
| 1509 | if (PUFFS_USE_DOTDOTCACHE(pmp)) { |
| 1510 | if (__predict_true(VPTOPP(vp)->pn_parent != NULL)) |
| 1511 | vrele(VPTOPP(vp)->pn_parent); |
| 1512 | else |
| 1513 | KASSERT(vp->v_type == VNON || (vp->v_vflag & VV_ROOT)); |
| 1514 | } |
| 1515 | |
| 1516 | puffs_putvnode(vp); |
| 1517 | |
| 1518 | return 0; |
| 1519 | } |
| 1520 | |
| 1521 | #define CSIZE sizeof(**ap->a_cookies) |
| 1522 | int |
| 1523 | puffs_vnop_readdir(void *v) |
| 1524 | { |
| 1525 | struct vop_readdir_args /* { |
| 1526 | const struct vnodeop_desc *a_desc; |
| 1527 | struct vnode *a_vp; |
| 1528 | struct uio *a_uio; |
| 1529 | kauth_cred_t a_cred; |
| 1530 | int *a_eofflag; |
| 1531 | off_t **a_cookies; |
| 1532 | int *a_ncookies; |
| 1533 | } */ *ap = v; |
| 1534 | PUFFS_MSG_VARS(vn, readdir); |
| 1535 | struct vnode *vp = ap->a_vp; |
| 1536 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1537 | size_t argsize, tomove, cookiemem, cookiesmax; |
| 1538 | struct uio *uio = ap->a_uio; |
| 1539 | size_t howmuch, resid; |
| 1540 | int error; |
| 1541 | |
| 1542 | /* |
| 1543 | * ok, so we need: resid + cookiemem = maxreq |
| 1544 | * => resid + cookiesize * (resid/minsize) = maxreq |
| 1545 | * => resid + cookiesize/minsize * resid = maxreq |
| 1546 | * => (cookiesize/minsize + 1) * resid = maxreq |
| 1547 | * => resid = maxreq / (cookiesize/minsize + 1) |
| 1548 | * |
| 1549 | * Since cookiesize <= minsize and we're not very big on floats, |
| 1550 | * we approximate that to be 1. Therefore: |
| 1551 | * |
| 1552 | * resid = maxreq / 2; |
| 1553 | * |
| 1554 | * Well, at least we didn't have to use differential equations |
| 1555 | * or the Gram-Schmidt process. |
| 1556 | * |
| 1557 | * (yes, I'm very afraid of this) |
| 1558 | */ |
| 1559 | KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); |
| 1560 | |
| 1561 | if (ap->a_cookies) { |
| 1562 | KASSERT(ap->a_ncookies != NULL); |
| 1563 | if (pmp->pmp_args.pa_fhsize == 0) |
| 1564 | return EOPNOTSUPP; |
| 1565 | resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; |
| 1566 | cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); |
| 1567 | cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ |
| 1568 | } else { |
| 1569 | resid = PUFFS_TOMOVE(uio->uio_resid, pmp); |
| 1570 | cookiesmax = 0; |
| 1571 | cookiemem = 0; |
| 1572 | } |
| 1573 | |
| 1574 | argsize = sizeof(struct puffs_vnmsg_readdir); |
| 1575 | tomove = resid + cookiemem; |
| 1576 | puffs_msgmem_alloc(argsize + tomove, &park_readdir, |
| 1577 | (void *)&readdir_msg, 1); |
| 1578 | |
| 1579 | puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); |
| 1580 | readdir_msg->pvnr_offset = uio->uio_offset; |
| 1581 | readdir_msg->pvnr_resid = resid; |
| 1582 | readdir_msg->pvnr_ncookies = cookiesmax; |
| 1583 | readdir_msg->pvnr_eofflag = 0; |
| 1584 | readdir_msg->pvnr_dentoff = cookiemem; |
| 1585 | puffs_msg_setinfo(park_readdir, PUFFSOP_VN, |
| 1586 | PUFFS_VN_READDIR, VPTOPNC(vp)); |
| 1587 | puffs_msg_setdelta(park_readdir, tomove); |
| 1588 | |
| 1589 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); |
| 1590 | error = checkerr(pmp, error, __func__); |
| 1591 | if (error) |
| 1592 | goto out; |
| 1593 | |
| 1594 | /* userspace is cheating? */ |
| 1595 | if (readdir_msg->pvnr_resid > resid) { |
| 1596 | puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, |
| 1597 | "resid grew" , VPTOPNC(vp)); |
| 1598 | ERROUT(EPROTO); |
| 1599 | } |
| 1600 | if (readdir_msg->pvnr_ncookies > cookiesmax) { |
| 1601 | puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, |
| 1602 | "too many cookies" , VPTOPNC(vp)); |
| 1603 | ERROUT(EPROTO); |
| 1604 | } |
| 1605 | |
| 1606 | /* check eof */ |
| 1607 | if (readdir_msg->pvnr_eofflag) |
| 1608 | *ap->a_eofflag = 1; |
| 1609 | |
| 1610 | /* bouncy-wouncy with the directory data */ |
| 1611 | howmuch = resid - readdir_msg->pvnr_resid; |
| 1612 | |
| 1613 | /* force eof if no data was returned (getcwd() needs this) */ |
| 1614 | if (howmuch == 0) { |
| 1615 | *ap->a_eofflag = 1; |
| 1616 | goto out; |
| 1617 | } |
| 1618 | |
| 1619 | error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); |
| 1620 | if (error) |
| 1621 | goto out; |
| 1622 | |
| 1623 | /* provide cookies to caller if so desired */ |
| 1624 | if (ap->a_cookies) { |
| 1625 | KASSERT(curlwp != uvm.pagedaemon_lwp); |
| 1626 | *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, |
| 1627 | M_TEMP, M_WAITOK); |
| 1628 | *ap->a_ncookies = readdir_msg->pvnr_ncookies; |
| 1629 | memcpy(*ap->a_cookies, readdir_msg->pvnr_data, |
| 1630 | *ap->a_ncookies*CSIZE); |
| 1631 | } |
| 1632 | |
| 1633 | /* next readdir starts here */ |
| 1634 | uio->uio_offset = readdir_msg->pvnr_offset; |
| 1635 | |
| 1636 | out: |
| 1637 | puffs_msgmem_release(park_readdir); |
| 1638 | return error; |
| 1639 | } |
| 1640 | #undef CSIZE |
| 1641 | |
| 1642 | /* |
| 1643 | * poll works by consuming the bitmask in pn_revents. If there are |
| 1644 | * events available, poll returns immediately. If not, it issues a |
| 1645 | * poll to userspace, selrecords itself and returns with no available |
| 1646 | * events. When the file server returns, it executes puffs_parkdone_poll(), |
| 1647 | * where available events are added to the bitmask. selnotify() is |
| 1648 | * then also executed by that function causing us to enter here again |
| 1649 | * and hopefully find the missing bits (unless someone got them first, |
| 1650 | * in which case it starts all over again). |
| 1651 | */ |
| 1652 | int |
| 1653 | puffs_vnop_poll(void *v) |
| 1654 | { |
| 1655 | struct vop_poll_args /* { |
| 1656 | const struct vnodeop_desc *a_desc; |
| 1657 | struct vnode *a_vp; |
| 1658 | int a_events; |
| 1659 | } */ *ap = v; |
| 1660 | PUFFS_MSG_VARS(vn, poll); |
| 1661 | struct vnode *vp = ap->a_vp; |
| 1662 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1663 | struct puffs_node *pn = vp->v_data; |
| 1664 | int events; |
| 1665 | |
| 1666 | if (EXISTSOP(pmp, POLL)) { |
| 1667 | mutex_enter(&pn->pn_mtx); |
| 1668 | events = pn->pn_revents & ap->a_events; |
| 1669 | if (events & ap->a_events) { |
| 1670 | pn->pn_revents &= ~ap->a_events; |
| 1671 | mutex_exit(&pn->pn_mtx); |
| 1672 | |
| 1673 | return events; |
| 1674 | } else { |
| 1675 | puffs_referencenode(pn); |
| 1676 | mutex_exit(&pn->pn_mtx); |
| 1677 | |
| 1678 | PUFFS_MSG_ALLOC(vn, poll); |
| 1679 | poll_msg->pvnr_events = ap->a_events; |
| 1680 | puffs_msg_setinfo(park_poll, PUFFSOP_VN, |
| 1681 | PUFFS_VN_POLL, VPTOPNC(vp)); |
| 1682 | puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); |
| 1683 | selrecord(curlwp, &pn->pn_sel); |
| 1684 | |
| 1685 | PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_poll, |
| 1686 | vp->v_data, NULL); |
| 1687 | PUFFS_MSG_RELEASE(poll); |
| 1688 | |
| 1689 | return 0; |
| 1690 | } |
| 1691 | } else { |
| 1692 | return genfs_poll(v); |
| 1693 | } |
| 1694 | } |
| 1695 | |
| 1696 | static int |
| 1697 | flushvncache(struct vnode *vp, off_t offlo, off_t offhi, bool wait) |
| 1698 | { |
| 1699 | struct puffs_node *pn = VPTOPP(vp); |
| 1700 | struct vattr va; |
| 1701 | int pflags, error; |
| 1702 | |
| 1703 | /* flush out information from our metacache, see vop_setattr */ |
| 1704 | if (pn->pn_stat & PNODE_METACACHE_MASK |
| 1705 | && (pn->pn_stat & PNODE_DYING) == 0) { |
| 1706 | vattr_null(&va); |
| 1707 | error = dosetattr(vp, &va, FSCRED, |
| 1708 | SETATTR_CHSIZE | (wait ? 0 : SETATTR_ASYNC)); |
| 1709 | if (error) |
| 1710 | return error; |
| 1711 | } |
| 1712 | |
| 1713 | /* |
| 1714 | * flush pages to avoid being overly dirty |
| 1715 | */ |
| 1716 | pflags = PGO_CLEANIT; |
| 1717 | if (wait) |
| 1718 | pflags |= PGO_SYNCIO; |
| 1719 | |
| 1720 | mutex_enter(vp->v_interlock); |
| 1721 | return VOP_PUTPAGES(vp, trunc_page(offlo), round_page(offhi), pflags); |
| 1722 | } |
| 1723 | |
| 1724 | int |
| 1725 | puffs_vnop_fsync(void *v) |
| 1726 | { |
| 1727 | struct vop_fsync_args /* { |
| 1728 | const struct vnodeop_desc *a_desc; |
| 1729 | struct vnode *a_vp; |
| 1730 | kauth_cred_t a_cred; |
| 1731 | int a_flags; |
| 1732 | off_t a_offlo; |
| 1733 | off_t a_offhi; |
| 1734 | } */ *ap = v; |
| 1735 | PUFFS_MSG_VARS(vn, fsync); |
| 1736 | struct vnode *vp; |
| 1737 | struct puffs_node *pn; |
| 1738 | struct puffs_mount *pmp; |
| 1739 | int error, dofaf; |
| 1740 | |
| 1741 | vp = ap->a_vp; |
| 1742 | KASSERT(vp != NULL); |
| 1743 | pn = VPTOPP(vp); |
| 1744 | KASSERT(pn != NULL); |
| 1745 | pmp = MPTOPUFFSMP(vp->v_mount); |
| 1746 | if (ap->a_flags & FSYNC_WAIT) { |
| 1747 | mutex_enter(&pn->pn_sizemtx); |
| 1748 | } else { |
| 1749 | if (mutex_tryenter(&pn->pn_sizemtx) == 0) |
| 1750 | return EDEADLK; |
| 1751 | } |
| 1752 | |
| 1753 | error = flushvncache(vp, ap->a_offlo, ap->a_offhi, |
| 1754 | (ap->a_flags & FSYNC_WAIT) == FSYNC_WAIT); |
| 1755 | if (error) |
| 1756 | goto out; |
| 1757 | |
| 1758 | /* |
| 1759 | * HELLO! We exit already here if the user server does not |
| 1760 | * support fsync OR if we should call fsync for a node which |
| 1761 | * has references neither in the kernel or the fs server. |
| 1762 | * Otherwise we continue to issue fsync() forward. |
| 1763 | */ |
| 1764 | error = 0; |
| 1765 | if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) |
| 1766 | goto out; |
| 1767 | |
| 1768 | dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; |
| 1769 | /* |
| 1770 | * We abuse VXLOCK to mean "vnode is going to die", so we issue |
| 1771 | * only FAFs for those. Otherwise there's a danger of deadlock, |
| 1772 | * since the execution context here might be the user server |
| 1773 | * doing some operation on another fs, which in turn caused a |
| 1774 | * vnode to be reclaimed from the freelist for this fs. |
| 1775 | */ |
| 1776 | if (dofaf == 0) { |
| 1777 | mutex_enter(vp->v_interlock); |
| 1778 | if (vdead_check(vp, VDEAD_NOWAIT) != 0) |
| 1779 | dofaf = 1; |
| 1780 | mutex_exit(vp->v_interlock); |
| 1781 | } |
| 1782 | |
| 1783 | PUFFS_MSG_ALLOC(vn, fsync); |
| 1784 | if (dofaf) |
| 1785 | puffs_msg_setfaf(park_fsync); |
| 1786 | |
| 1787 | puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); |
| 1788 | fsync_msg->pvnr_flags = ap->a_flags; |
| 1789 | fsync_msg->pvnr_offlo = ap->a_offlo; |
| 1790 | fsync_msg->pvnr_offhi = ap->a_offhi; |
| 1791 | puffs_msg_setinfo(park_fsync, PUFFSOP_VN, |
| 1792 | PUFFS_VN_FSYNC, VPTOPNC(vp)); |
| 1793 | |
| 1794 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); |
| 1795 | PUFFS_MSG_RELEASE(fsync); |
| 1796 | |
| 1797 | error = checkerr(pmp, error, __func__); |
| 1798 | |
| 1799 | out: |
| 1800 | mutex_exit(&pn->pn_sizemtx); |
| 1801 | return error; |
| 1802 | } |
| 1803 | |
| 1804 | int |
| 1805 | puffs_vnop_seek(void *v) |
| 1806 | { |
| 1807 | struct vop_seek_args /* { |
| 1808 | const struct vnodeop_desc *a_desc; |
| 1809 | struct vnode *a_vp; |
| 1810 | off_t a_oldoff; |
| 1811 | off_t a_newoff; |
| 1812 | kauth_cred_t a_cred; |
| 1813 | } */ *ap = v; |
| 1814 | PUFFS_MSG_VARS(vn, seek); |
| 1815 | struct vnode *vp = ap->a_vp; |
| 1816 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 1817 | int error; |
| 1818 | |
| 1819 | PUFFS_MSG_ALLOC(vn, seek); |
| 1820 | seek_msg->pvnr_oldoff = ap->a_oldoff; |
| 1821 | seek_msg->pvnr_newoff = ap->a_newoff; |
| 1822 | puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); |
| 1823 | puffs_msg_setinfo(park_seek, PUFFSOP_VN, |
| 1824 | PUFFS_VN_SEEK, VPTOPNC(vp)); |
| 1825 | |
| 1826 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); |
| 1827 | PUFFS_MSG_RELEASE(seek); |
| 1828 | return checkerr(pmp, error, __func__); |
| 1829 | } |
| 1830 | |
| 1831 | static int |
| 1832 | callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, |
| 1833 | struct componentname *cnp) |
| 1834 | { |
| 1835 | PUFFS_MSG_VARS(vn, remove); |
| 1836 | int error; |
| 1837 | |
| 1838 | PUFFS_MSG_ALLOC(vn, remove); |
| 1839 | remove_msg->pvnr_cookie_targ = ck; |
| 1840 | puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, |
| 1841 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 1842 | puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); |
| 1843 | |
| 1844 | PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); |
| 1845 | PUFFS_MSG_RELEASE(remove); |
| 1846 | |
| 1847 | return checkerr(pmp, error, __func__); |
| 1848 | } |
| 1849 | |
| 1850 | /* |
| 1851 | * XXX: can't use callremove now because can't catch setbacks with |
| 1852 | * it due to lack of a pnode argument. |
| 1853 | */ |
| 1854 | int |
| 1855 | puffs_vnop_remove(void *v) |
| 1856 | { |
| 1857 | struct vop_remove_args /* { |
| 1858 | const struct vnodeop_desc *a_desc; |
| 1859 | struct vnode *a_dvp; |
| 1860 | struct vnode *a_vp; |
| 1861 | struct componentname *a_cnp; |
| 1862 | } */ *ap = v; |
| 1863 | PUFFS_MSG_VARS(vn, remove); |
| 1864 | struct vnode *dvp = ap->a_dvp; |
| 1865 | struct vnode *vp = ap->a_vp; |
| 1866 | struct puffs_node *dpn = VPTOPP(dvp); |
| 1867 | struct puffs_node *pn = VPTOPP(vp); |
| 1868 | struct componentname *cnp = ap->a_cnp; |
| 1869 | struct mount *mp = dvp->v_mount; |
| 1870 | struct puffs_mount *pmp = MPTOPUFFSMP(mp); |
| 1871 | int error; |
| 1872 | |
| 1873 | PUFFS_MSG_ALLOC(vn, remove); |
| 1874 | remove_msg->pvnr_cookie_targ = VPTOPNC(vp); |
| 1875 | puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, |
| 1876 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 1877 | puffs_msg_setinfo(park_remove, PUFFSOP_VN, |
| 1878 | PUFFS_VN_REMOVE, VPTOPNC(dvp)); |
| 1879 | |
| 1880 | puffs_msg_enqueue(pmp, park_remove); |
| 1881 | REFPN_AND_UNLOCKVP(dvp, dpn); |
| 1882 | if (dvp == vp) |
| 1883 | REFPN(pn); |
| 1884 | else |
| 1885 | REFPN_AND_UNLOCKVP(vp, pn); |
| 1886 | error = puffs_msg_wait2(pmp, park_remove, dpn, pn); |
| 1887 | |
| 1888 | PUFFS_MSG_RELEASE(remove); |
| 1889 | |
| 1890 | puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); |
| 1891 | |
| 1892 | RELEPN_AND_VP(dvp, dpn); |
| 1893 | RELEPN_AND_VP(vp, pn); |
| 1894 | |
| 1895 | error = checkerr(pmp, error, __func__); |
| 1896 | return error; |
| 1897 | } |
| 1898 | |
| 1899 | int |
| 1900 | puffs_vnop_mkdir(void *v) |
| 1901 | { |
| 1902 | struct vop_mkdir_v3_args /* { |
| 1903 | const struct vnodeop_desc *a_desc; |
| 1904 | struct vnode *a_dvp; |
| 1905 | struct vnode **a_vpp; |
| 1906 | struct componentname *a_cnp; |
| 1907 | struct vattr *a_vap; |
| 1908 | } */ *ap = v; |
| 1909 | PUFFS_MSG_VARS(vn, mkdir); |
| 1910 | struct vnode *dvp = ap->a_dvp; |
| 1911 | struct puffs_node *dpn = VPTOPP(dvp); |
| 1912 | struct componentname *cnp = ap->a_cnp; |
| 1913 | struct mount *mp = dvp->v_mount; |
| 1914 | struct puffs_mount *pmp = MPTOPUFFSMP(mp); |
| 1915 | int error; |
| 1916 | |
| 1917 | PUFFS_MSG_ALLOC(vn, mkdir); |
| 1918 | puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, |
| 1919 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 1920 | mkdir_msg->pvnr_va = *ap->a_vap; |
| 1921 | puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, |
| 1922 | PUFFS_VN_MKDIR, VPTOPNC(dvp)); |
| 1923 | |
| 1924 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); |
| 1925 | |
| 1926 | error = checkerr(pmp, error, __func__); |
| 1927 | if (error) |
| 1928 | goto out; |
| 1929 | |
| 1930 | error = puffs_newnode(mp, dvp, ap->a_vpp, |
| 1931 | mkdir_msg->pvnr_newnode, cnp, VDIR, 0); |
| 1932 | if (error) { |
| 1933 | puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, |
| 1934 | mkdir_msg->pvnr_newnode, cnp); |
| 1935 | goto out; |
| 1936 | } |
| 1937 | |
| 1938 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 1939 | struct timespec *va_ttl = &mkdir_msg->pvnr_va_ttl; |
| 1940 | struct timespec *cn_ttl = &mkdir_msg->pvnr_cn_ttl; |
| 1941 | struct vattr *rvap = &mkdir_msg->pvnr_va; |
| 1942 | |
| 1943 | update_va(*ap->a_vpp, NULL, rvap, |
| 1944 | va_ttl, cn_ttl, SETATTR_CHSIZE); |
| 1945 | } |
| 1946 | |
| 1947 | VPTOPP(*ap->a_vpp)->pn_nlookup++; |
| 1948 | |
| 1949 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 1950 | (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) |
| 1951 | update_parent(*ap->a_vpp, dvp); |
| 1952 | |
| 1953 | out: |
| 1954 | PUFFS_MSG_RELEASE(mkdir); |
| 1955 | return error; |
| 1956 | } |
| 1957 | |
| 1958 | static int |
| 1959 | callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, |
| 1960 | struct componentname *cnp) |
| 1961 | { |
| 1962 | PUFFS_MSG_VARS(vn, rmdir); |
| 1963 | int error; |
| 1964 | |
| 1965 | PUFFS_MSG_ALLOC(vn, rmdir); |
| 1966 | rmdir_msg->pvnr_cookie_targ = ck; |
| 1967 | puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, |
| 1968 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 1969 | puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); |
| 1970 | |
| 1971 | PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); |
| 1972 | PUFFS_MSG_RELEASE(rmdir); |
| 1973 | |
| 1974 | return checkerr(pmp, error, __func__); |
| 1975 | } |
| 1976 | |
| 1977 | int |
| 1978 | puffs_vnop_rmdir(void *v) |
| 1979 | { |
| 1980 | struct vop_rmdir_args /* { |
| 1981 | const struct vnodeop_desc *a_desc; |
| 1982 | struct vnode *a_dvp; |
| 1983 | struct vnode *a_vp; |
| 1984 | struct componentname *a_cnp; |
| 1985 | } */ *ap = v; |
| 1986 | PUFFS_MSG_VARS(vn, rmdir); |
| 1987 | struct vnode *dvp = ap->a_dvp; |
| 1988 | struct vnode *vp = ap->a_vp; |
| 1989 | struct puffs_node *dpn = VPTOPP(dvp); |
| 1990 | struct puffs_node *pn = VPTOPP(vp); |
| 1991 | struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); |
| 1992 | struct componentname *cnp = ap->a_cnp; |
| 1993 | int error; |
| 1994 | |
| 1995 | PUFFS_MSG_ALLOC(vn, rmdir); |
| 1996 | rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); |
| 1997 | puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, |
| 1998 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 1999 | puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, |
| 2000 | PUFFS_VN_RMDIR, VPTOPNC(dvp)); |
| 2001 | |
| 2002 | puffs_msg_enqueue(pmp, park_rmdir); |
| 2003 | REFPN_AND_UNLOCKVP(dvp, dpn); |
| 2004 | REFPN_AND_UNLOCKVP(vp, pn); |
| 2005 | error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); |
| 2006 | |
| 2007 | PUFFS_MSG_RELEASE(rmdir); |
| 2008 | |
| 2009 | puffs_updatenode(VPTOPP(dvp), PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); |
| 2010 | |
| 2011 | /* XXX: some call cache_purge() *for both vnodes* here, investigate */ |
| 2012 | RELEPN_AND_VP(dvp, dpn); |
| 2013 | RELEPN_AND_VP(vp, pn); |
| 2014 | |
| 2015 | return error; |
| 2016 | } |
| 2017 | |
| 2018 | int |
| 2019 | puffs_vnop_link(void *v) |
| 2020 | { |
| 2021 | struct vop_link_v2_args /* { |
| 2022 | const struct vnodeop_desc *a_desc; |
| 2023 | struct vnode *a_dvp; |
| 2024 | struct vnode *a_vp; |
| 2025 | struct componentname *a_cnp; |
| 2026 | } */ *ap = v; |
| 2027 | PUFFS_MSG_VARS(vn, link); |
| 2028 | struct vnode *dvp = ap->a_dvp; |
| 2029 | struct vnode *vp = ap->a_vp; |
| 2030 | struct puffs_node *dpn = VPTOPP(dvp); |
| 2031 | struct puffs_node *pn = VPTOPP(vp); |
| 2032 | struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); |
| 2033 | struct componentname *cnp = ap->a_cnp; |
| 2034 | int error; |
| 2035 | |
| 2036 | PUFFS_MSG_ALLOC(vn, link); |
| 2037 | link_msg->pvnr_cookie_targ = VPTOPNC(vp); |
| 2038 | puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, |
| 2039 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 2040 | puffs_msg_setinfo(park_link, PUFFSOP_VN, |
| 2041 | PUFFS_VN_LINK, VPTOPNC(dvp)); |
| 2042 | |
| 2043 | puffs_msg_enqueue(pmp, park_link); |
| 2044 | error = puffs_msg_wait2(pmp, park_link, dpn, pn); |
| 2045 | |
| 2046 | PUFFS_MSG_RELEASE(link); |
| 2047 | |
| 2048 | error = checkerr(pmp, error, __func__); |
| 2049 | |
| 2050 | /* |
| 2051 | * XXX: stay in touch with the cache. I don't like this, but |
| 2052 | * don't have a better solution either. See also puffs_rename(). |
| 2053 | */ |
| 2054 | if (error == 0) { |
| 2055 | puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); |
| 2056 | puffs_updatenode(VPTOPP(dvp), |
| 2057 | PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); |
| 2058 | } |
| 2059 | |
| 2060 | return error; |
| 2061 | } |
| 2062 | |
| 2063 | int |
| 2064 | puffs_vnop_symlink(void *v) |
| 2065 | { |
| 2066 | struct vop_symlink_v3_args /* { |
| 2067 | const struct vnodeop_desc *a_desc; |
| 2068 | struct vnode *a_dvp; |
| 2069 | struct vnode **a_vpp; |
| 2070 | struct componentname *a_cnp; |
| 2071 | struct vattr *a_vap; |
| 2072 | char *a_target; |
| 2073 | } */ *ap = v; |
| 2074 | PUFFS_MSG_VARS(vn, symlink); |
| 2075 | struct vnode *dvp = ap->a_dvp; |
| 2076 | struct puffs_node *dpn = VPTOPP(dvp); |
| 2077 | struct mount *mp = dvp->v_mount; |
| 2078 | struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); |
| 2079 | struct componentname *cnp = ap->a_cnp; |
| 2080 | int error; |
| 2081 | |
| 2082 | *ap->a_vpp = NULL; |
| 2083 | |
| 2084 | PUFFS_MSG_ALLOC(vn, symlink); |
| 2085 | puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, |
| 2086 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 2087 | symlink_msg->pvnr_va = *ap->a_vap; |
| 2088 | (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, |
| 2089 | sizeof(symlink_msg->pvnr_link)); |
| 2090 | puffs_msg_setinfo(park_symlink, PUFFSOP_VN, |
| 2091 | PUFFS_VN_SYMLINK, VPTOPNC(dvp)); |
| 2092 | |
| 2093 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); |
| 2094 | |
| 2095 | error = checkerr(pmp, error, __func__); |
| 2096 | if (error) |
| 2097 | goto out; |
| 2098 | |
| 2099 | error = puffs_newnode(mp, dvp, ap->a_vpp, |
| 2100 | symlink_msg->pvnr_newnode, cnp, VLNK, 0); |
| 2101 | if (error) { |
| 2102 | puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, |
| 2103 | symlink_msg->pvnr_newnode, cnp); |
| 2104 | goto out; |
| 2105 | } |
| 2106 | |
| 2107 | if (PUFFS_USE_FS_TTL(pmp)) { |
| 2108 | struct timespec *va_ttl = &symlink_msg->pvnr_va_ttl; |
| 2109 | struct timespec *cn_ttl = &symlink_msg->pvnr_cn_ttl; |
| 2110 | struct vattr *rvap = &symlink_msg->pvnr_va; |
| 2111 | |
| 2112 | update_va(*ap->a_vpp, NULL, rvap, |
| 2113 | va_ttl, cn_ttl, SETATTR_CHSIZE); |
| 2114 | } |
| 2115 | |
| 2116 | VPTOPP(*ap->a_vpp)->pn_nlookup++; |
| 2117 | |
| 2118 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 2119 | (VPTOPP(*ap->a_vpp)->pn_parent != dvp)) |
| 2120 | update_parent(*ap->a_vpp, dvp); |
| 2121 | |
| 2122 | out: |
| 2123 | PUFFS_MSG_RELEASE(symlink); |
| 2124 | |
| 2125 | return error; |
| 2126 | } |
| 2127 | |
| 2128 | int |
| 2129 | puffs_vnop_readlink(void *v) |
| 2130 | { |
| 2131 | struct vop_readlink_args /* { |
| 2132 | const struct vnodeop_desc *a_desc; |
| 2133 | struct vnode *a_vp; |
| 2134 | struct uio *a_uio; |
| 2135 | kauth_cred_t a_cred; |
| 2136 | } */ *ap = v; |
| 2137 | PUFFS_MSG_VARS(vn, readlink); |
| 2138 | struct vnode *vp = ap->a_vp; |
| 2139 | struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); |
| 2140 | size_t linklen; |
| 2141 | int error; |
| 2142 | |
| 2143 | PUFFS_MSG_ALLOC(vn, readlink); |
| 2144 | puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); |
| 2145 | linklen = sizeof(readlink_msg->pvnr_link); |
| 2146 | readlink_msg->pvnr_linklen = linklen; |
| 2147 | puffs_msg_setinfo(park_readlink, PUFFSOP_VN, |
| 2148 | PUFFS_VN_READLINK, VPTOPNC(vp)); |
| 2149 | |
| 2150 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); |
| 2151 | error = checkerr(pmp, error, __func__); |
| 2152 | if (error) |
| 2153 | goto out; |
| 2154 | |
| 2155 | /* bad bad user file server */ |
| 2156 | if (readlink_msg->pvnr_linklen > linklen) { |
| 2157 | puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, |
| 2158 | "linklen too big" , VPTOPNC(ap->a_vp)); |
| 2159 | error = EPROTO; |
| 2160 | goto out; |
| 2161 | } |
| 2162 | |
| 2163 | error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, |
| 2164 | ap->a_uio); |
| 2165 | out: |
| 2166 | PUFFS_MSG_RELEASE(readlink); |
| 2167 | return error; |
| 2168 | } |
| 2169 | |
| 2170 | int |
| 2171 | puffs_vnop_rename(void *v) |
| 2172 | { |
| 2173 | struct vop_rename_args /* { |
| 2174 | const struct vnodeop_desc *a_desc; |
| 2175 | struct vnode *a_fdvp; |
| 2176 | struct vnode *a_fvp; |
| 2177 | struct componentname *a_fcnp; |
| 2178 | struct vnode *a_tdvp; |
| 2179 | struct vnode *a_tvp; |
| 2180 | struct componentname *a_tcnp; |
| 2181 | } */ *ap = v; |
| 2182 | PUFFS_MSG_VARS(vn, rename); |
| 2183 | struct vnode *fdvp = ap->a_fdvp, *fvp = ap->a_fvp; |
| 2184 | struct vnode *tdvp = ap->a_tdvp, *tvp = ap->a_tvp; |
| 2185 | struct puffs_node *fpn = ap->a_fvp->v_data; |
| 2186 | struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); |
| 2187 | int error; |
| 2188 | bool doabort = true; |
| 2189 | |
| 2190 | if ((fvp->v_mount != tdvp->v_mount) || |
| 2191 | (tvp && (fvp->v_mount != tvp->v_mount))) { |
| 2192 | ERROUT(EXDEV); |
| 2193 | } |
| 2194 | |
| 2195 | PUFFS_MSG_ALLOC(vn, rename); |
| 2196 | rename_msg->pvnr_cookie_src = VPTOPNC(fvp); |
| 2197 | rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp); |
| 2198 | if (tvp) |
| 2199 | rename_msg->pvnr_cookie_targ = VPTOPNC(tvp); |
| 2200 | else |
| 2201 | rename_msg->pvnr_cookie_targ = NULL; |
| 2202 | puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, |
| 2203 | ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 2204 | puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, |
| 2205 | ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 2206 | puffs_msg_setinfo(park_rename, PUFFSOP_VN, |
| 2207 | PUFFS_VN_RENAME, VPTOPNC(fdvp)); |
| 2208 | |
| 2209 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); |
| 2210 | doabort = false; |
| 2211 | PUFFS_MSG_RELEASE(rename); |
| 2212 | error = checkerr(pmp, error, __func__); |
| 2213 | |
| 2214 | /* |
| 2215 | * XXX: stay in touch with the cache. I don't like this, but |
| 2216 | * don't have a better solution either. See also puffs_link(). |
| 2217 | */ |
| 2218 | if (error == 0) { |
| 2219 | puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); |
| 2220 | puffs_updatenode(VPTOPP(fdvp), |
| 2221 | PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, 0); |
| 2222 | if (fdvp != tdvp) |
| 2223 | puffs_updatenode(VPTOPP(tdvp), |
| 2224 | PUFFS_UPDATECTIME|PUFFS_UPDATEMTIME, |
| 2225 | 0); |
| 2226 | |
| 2227 | if (PUFFS_USE_DOTDOTCACHE(pmp) && |
| 2228 | (VPTOPP(fvp)->pn_parent != tdvp)) |
| 2229 | update_parent(fvp, tdvp); |
| 2230 | } |
| 2231 | |
| 2232 | |
| 2233 | out: |
| 2234 | if (doabort) |
| 2235 | VOP_ABORTOP(tdvp, ap->a_tcnp); |
| 2236 | if (tvp != NULL) |
| 2237 | vput(tvp); |
| 2238 | if (tdvp == tvp) |
| 2239 | vrele(tdvp); |
| 2240 | else |
| 2241 | vput(tdvp); |
| 2242 | |
| 2243 | if (doabort) |
| 2244 | VOP_ABORTOP(fdvp, ap->a_fcnp); |
| 2245 | vrele(fdvp); |
| 2246 | vrele(fvp); |
| 2247 | |
| 2248 | return error; |
| 2249 | } |
| 2250 | |
| 2251 | #define RWARGS(cont, iofl, move, offset, creds) \ |
| 2252 | (cont)->pvnr_ioflag = (iofl); \ |
| 2253 | (cont)->pvnr_resid = (move); \ |
| 2254 | (cont)->pvnr_offset = (offset); \ |
| 2255 | puffs_credcvt(&(cont)->pvnr_cred, creds) |
| 2256 | |
| 2257 | int |
| 2258 | puffs_vnop_read(void *v) |
| 2259 | { |
| 2260 | struct vop_read_args /* { |
| 2261 | const struct vnodeop_desc *a_desc; |
| 2262 | struct vnode *a_vp; |
| 2263 | struct uio *a_uio; |
| 2264 | int a_ioflag; |
| 2265 | kauth_cred_t a_cred; |
| 2266 | } */ *ap = v; |
| 2267 | PUFFS_MSG_VARS(vn, read); |
| 2268 | struct vnode *vp = ap->a_vp; |
| 2269 | struct puffs_node *pn = VPTOPP(vp); |
| 2270 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2271 | struct uio *uio = ap->a_uio; |
| 2272 | size_t tomove, argsize; |
| 2273 | vsize_t bytelen; |
| 2274 | int error; |
| 2275 | |
| 2276 | read_msg = NULL; |
| 2277 | error = 0; |
| 2278 | |
| 2279 | /* std sanity */ |
| 2280 | if (uio->uio_resid == 0) |
| 2281 | return 0; |
| 2282 | if (uio->uio_offset < 0) |
| 2283 | return EFBIG; |
| 2284 | |
| 2285 | /* |
| 2286 | * On the case of reading empty files and (vp->v_size != 0) below: |
| 2287 | * some filesystems (hint: FUSE and distributed filesystems) still |
| 2288 | * expect to get the READ in order to update atime. Reading through |
| 2289 | * the case filters empty files, therefore we prefer to bypass the |
| 2290 | * cache here. |
| 2291 | */ |
| 2292 | if (vp->v_type == VREG && |
| 2293 | PUFFS_USE_PAGECACHE(pmp) && |
| 2294 | !(pn->pn_stat & PNODE_RDIRECT) && |
| 2295 | (vp->v_size != 0)) { |
| 2296 | const int advice = IO_ADV_DECODE(ap->a_ioflag); |
| 2297 | |
| 2298 | while (uio->uio_resid > 0) { |
| 2299 | if (vp->v_size <= uio->uio_offset) { |
| 2300 | break; |
| 2301 | } |
| 2302 | bytelen = MIN(uio->uio_resid, |
| 2303 | vp->v_size - uio->uio_offset); |
| 2304 | if (bytelen == 0) |
| 2305 | break; |
| 2306 | |
| 2307 | error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, |
| 2308 | UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); |
| 2309 | if (error) |
| 2310 | break; |
| 2311 | } |
| 2312 | |
| 2313 | if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) |
| 2314 | puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); |
| 2315 | } else { |
| 2316 | /* |
| 2317 | * in case it's not a regular file or we're operating |
| 2318 | * uncached, do read in the old-fashioned style, |
| 2319 | * i.e. explicit read operations |
| 2320 | */ |
| 2321 | |
| 2322 | tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); |
| 2323 | argsize = sizeof(struct puffs_vnmsg_read); |
| 2324 | puffs_msgmem_alloc(argsize + tomove, &park_read, |
| 2325 | (void *)&read_msg, 1); |
| 2326 | |
| 2327 | error = 0; |
| 2328 | while (uio->uio_resid > 0) { |
| 2329 | tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); |
| 2330 | memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ |
| 2331 | RWARGS(read_msg, ap->a_ioflag, tomove, |
| 2332 | uio->uio_offset, ap->a_cred); |
| 2333 | puffs_msg_setinfo(park_read, PUFFSOP_VN, |
| 2334 | PUFFS_VN_READ, VPTOPNC(vp)); |
| 2335 | puffs_msg_setdelta(park_read, tomove); |
| 2336 | |
| 2337 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, |
| 2338 | NULL, error); |
| 2339 | error = checkerr(pmp, error, __func__); |
| 2340 | if (error) |
| 2341 | break; |
| 2342 | |
| 2343 | if (read_msg->pvnr_resid > tomove) { |
| 2344 | puffs_senderr(pmp, PUFFS_ERR_READ, |
| 2345 | E2BIG, "resid grew" , VPTOPNC(ap->a_vp)); |
| 2346 | error = EPROTO; |
| 2347 | break; |
| 2348 | } |
| 2349 | |
| 2350 | error = uiomove(read_msg->pvnr_data, |
| 2351 | tomove - read_msg->pvnr_resid, uio); |
| 2352 | |
| 2353 | /* |
| 2354 | * in case the file is out of juice, resid from |
| 2355 | * userspace is != 0. and the error-case is |
| 2356 | * quite obvious |
| 2357 | */ |
| 2358 | if (error || read_msg->pvnr_resid) |
| 2359 | break; |
| 2360 | } |
| 2361 | |
| 2362 | puffs_msgmem_release(park_read); |
| 2363 | } |
| 2364 | |
| 2365 | return error; |
| 2366 | } |
| 2367 | |
| 2368 | /* |
| 2369 | * XXX: in case of a failure, this leaves uio in a bad state. |
| 2370 | * We could theoretically copy the uio and iovecs and "replay" |
| 2371 | * them the right amount after the userspace trip, but don't |
| 2372 | * bother for now. |
| 2373 | */ |
| 2374 | int |
| 2375 | puffs_vnop_write(void *v) |
| 2376 | { |
| 2377 | struct vop_write_args /* { |
| 2378 | const struct vnodeop_desc *a_desc; |
| 2379 | struct vnode *a_vp; |
| 2380 | struct uio *a_uio; |
| 2381 | int a_ioflag; |
| 2382 | kauth_cred_t a_cred; |
| 2383 | } */ *ap = v; |
| 2384 | PUFFS_MSG_VARS(vn, write); |
| 2385 | struct vnode *vp = ap->a_vp; |
| 2386 | struct puffs_node *pn = VPTOPP(vp); |
| 2387 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2388 | struct uio *uio = ap->a_uio; |
| 2389 | size_t tomove, argsize; |
| 2390 | off_t oldoff, newoff, origoff; |
| 2391 | vsize_t bytelen; |
| 2392 | int error, uflags; |
| 2393 | int ubcflags; |
| 2394 | |
| 2395 | error = uflags = 0; |
| 2396 | write_msg = NULL; |
| 2397 | |
| 2398 | /* std sanity */ |
| 2399 | if (uio->uio_resid == 0) |
| 2400 | return 0; |
| 2401 | if (uio->uio_offset < 0) |
| 2402 | return EFBIG; |
| 2403 | |
| 2404 | mutex_enter(&pn->pn_sizemtx); |
| 2405 | |
| 2406 | /* |
| 2407 | * userspace *should* be allowed to control this, |
| 2408 | * but with UBC it's a bit unclear how to handle it |
| 2409 | */ |
| 2410 | if (ap->a_ioflag & IO_APPEND) |
| 2411 | uio->uio_offset = vp->v_size; |
| 2412 | |
| 2413 | origoff = uio->uio_offset; |
| 2414 | |
| 2415 | if (vp->v_type == VREG && |
| 2416 | PUFFS_USE_PAGECACHE(pmp) && |
| 2417 | !(pn->pn_stat & PNODE_WDIRECT)) { |
| 2418 | ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); |
| 2419 | |
| 2420 | while (uio->uio_resid > 0) { |
| 2421 | oldoff = uio->uio_offset; |
| 2422 | bytelen = uio->uio_resid; |
| 2423 | |
| 2424 | newoff = oldoff + bytelen; |
| 2425 | if (vp->v_size < newoff) { |
| 2426 | uvm_vnp_setwritesize(vp, newoff); |
| 2427 | } |
| 2428 | error = ubc_uiomove(&vp->v_uobj, uio, bytelen, |
| 2429 | UVM_ADV_RANDOM, ubcflags); |
| 2430 | |
| 2431 | /* |
| 2432 | * In case of a ubc_uiomove() error, |
| 2433 | * opt to not extend the file at all and |
| 2434 | * return an error. Otherwise, if we attempt |
| 2435 | * to clear the memory we couldn't fault to, |
| 2436 | * we might generate a kernel page fault. |
| 2437 | */ |
| 2438 | if (vp->v_size < newoff) { |
| 2439 | if (error == 0) { |
| 2440 | uflags |= PUFFS_UPDATESIZE; |
| 2441 | uvm_vnp_setsize(vp, newoff); |
| 2442 | } else { |
| 2443 | uvm_vnp_setwritesize(vp, vp->v_size); |
| 2444 | } |
| 2445 | } |
| 2446 | if (error) |
| 2447 | break; |
| 2448 | |
| 2449 | /* |
| 2450 | * If we're writing large files, flush to file server |
| 2451 | * every 64k. Otherwise we can very easily exhaust |
| 2452 | * kernel and user memory, as the file server cannot |
| 2453 | * really keep up with our writing speed. |
| 2454 | * |
| 2455 | * Note: this does *NOT* honor MNT_ASYNC, because |
| 2456 | * that gives userland too much say in the kernel. |
| 2457 | */ |
| 2458 | if (oldoff >> 16 != uio->uio_offset >> 16) { |
| 2459 | mutex_enter(vp->v_interlock); |
| 2460 | error = VOP_PUTPAGES(vp, oldoff & ~0xffff, |
| 2461 | uio->uio_offset & ~0xffff, |
| 2462 | PGO_CLEANIT | PGO_SYNCIO); |
| 2463 | if (error) |
| 2464 | break; |
| 2465 | } |
| 2466 | } |
| 2467 | |
| 2468 | /* synchronous I/O? */ |
| 2469 | if (error == 0 && ap->a_ioflag & IO_SYNC) { |
| 2470 | mutex_enter(vp->v_interlock); |
| 2471 | error = VOP_PUTPAGES(vp, trunc_page(origoff), |
| 2472 | round_page(uio->uio_offset), |
| 2473 | PGO_CLEANIT | PGO_SYNCIO); |
| 2474 | |
| 2475 | /* write through page cache? */ |
| 2476 | } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { |
| 2477 | mutex_enter(vp->v_interlock); |
| 2478 | error = VOP_PUTPAGES(vp, trunc_page(origoff), |
| 2479 | round_page(uio->uio_offset), PGO_CLEANIT); |
| 2480 | } |
| 2481 | } else { |
| 2482 | /* tomove is non-increasing */ |
| 2483 | tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); |
| 2484 | argsize = sizeof(struct puffs_vnmsg_write) + tomove; |
| 2485 | puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); |
| 2486 | |
| 2487 | while (uio->uio_resid > 0) { |
| 2488 | /* move data to buffer */ |
| 2489 | tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); |
| 2490 | memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ |
| 2491 | RWARGS(write_msg, ap->a_ioflag, tomove, |
| 2492 | uio->uio_offset, ap->a_cred); |
| 2493 | error = uiomove(write_msg->pvnr_data, tomove, uio); |
| 2494 | if (error) |
| 2495 | break; |
| 2496 | |
| 2497 | /* move buffer to userspace */ |
| 2498 | puffs_msg_setinfo(park_write, PUFFSOP_VN, |
| 2499 | PUFFS_VN_WRITE, VPTOPNC(vp)); |
| 2500 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, |
| 2501 | NULL, error); |
| 2502 | error = checkerr(pmp, error, __func__); |
| 2503 | if (error) |
| 2504 | break; |
| 2505 | |
| 2506 | if (write_msg->pvnr_resid > tomove) { |
| 2507 | puffs_senderr(pmp, PUFFS_ERR_WRITE, |
| 2508 | E2BIG, "resid grew" , VPTOPNC(ap->a_vp)); |
| 2509 | error = EPROTO; |
| 2510 | break; |
| 2511 | } |
| 2512 | |
| 2513 | /* adjust file size */ |
| 2514 | if (vp->v_size < uio->uio_offset) { |
| 2515 | uflags |= PUFFS_UPDATESIZE; |
| 2516 | uvm_vnp_setsize(vp, uio->uio_offset); |
| 2517 | } |
| 2518 | |
| 2519 | /* didn't move everything? bad userspace. bail */ |
| 2520 | if (write_msg->pvnr_resid != 0) { |
| 2521 | error = EIO; |
| 2522 | break; |
| 2523 | } |
| 2524 | } |
| 2525 | puffs_msgmem_release(park_write); |
| 2526 | |
| 2527 | /* |
| 2528 | * Direct I/O on write but not on read: we must |
| 2529 | * invlidate the written pages so that we read |
| 2530 | * the written data and not the stalled cache. |
| 2531 | */ |
| 2532 | if ((error == 0) && |
| 2533 | (vp->v_type == VREG) && PUFFS_USE_PAGECACHE(pmp) && |
| 2534 | (pn->pn_stat & PNODE_WDIRECT) && |
| 2535 | !(pn->pn_stat & PNODE_RDIRECT)) { |
| 2536 | voff_t off_lo = trunc_page(origoff); |
| 2537 | voff_t off_hi = round_page(uio->uio_offset); |
| 2538 | |
| 2539 | mutex_enter(vp->v_uobj.vmobjlock); |
| 2540 | error = VOP_PUTPAGES(vp, off_lo, off_hi, PGO_FREE); |
| 2541 | } |
| 2542 | } |
| 2543 | |
| 2544 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
| 2545 | uflags |= PUFFS_UPDATEATIME; |
| 2546 | uflags |= PUFFS_UPDATECTIME; |
| 2547 | uflags |= PUFFS_UPDATEMTIME; |
| 2548 | puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); |
| 2549 | |
| 2550 | /* |
| 2551 | * If we do not use meta flush, we need to update the |
| 2552 | * filesystem now, otherwise we will get a stale value |
| 2553 | * on the next GETATTR |
| 2554 | */ |
| 2555 | if (!PUFFS_USE_METAFLUSH(pmp) && (uflags & PUFFS_UPDATESIZE)) { |
| 2556 | struct vattr va; |
| 2557 | int ret; |
| 2558 | |
| 2559 | vattr_null(&va); |
| 2560 | va.va_size = vp->v_size; |
| 2561 | ret = dosetattr(vp, &va, FSCRED, 0); |
| 2562 | if (ret) { |
| 2563 | DPRINTF(("dosetattr set size to %jd failed: %d\n" , |
| 2564 | (intmax_t)vp->v_size, ret)); |
| 2565 | } |
| 2566 | } |
| 2567 | mutex_exit(&pn->pn_sizemtx); |
| 2568 | return error; |
| 2569 | } |
| 2570 | |
| 2571 | int |
| 2572 | puffs_vnop_fallocate(void *v) |
| 2573 | { |
| 2574 | struct vop_fallocate_args /* { |
| 2575 | const struct vnodeop_desc *a_desc; |
| 2576 | struct vnode *a_vp; |
| 2577 | off_t a_pos; |
| 2578 | off_t a_len; |
| 2579 | } */ *ap = v; |
| 2580 | struct vnode *vp = ap->a_vp; |
| 2581 | struct puffs_node *pn = VPTOPP(vp); |
| 2582 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2583 | PUFFS_MSG_VARS(vn, fallocate); |
| 2584 | int error; |
| 2585 | |
| 2586 | mutex_enter(&pn->pn_sizemtx); |
| 2587 | |
| 2588 | PUFFS_MSG_ALLOC(vn, fallocate); |
| 2589 | fallocate_msg->pvnr_off = ap->a_pos; |
| 2590 | fallocate_msg->pvnr_len = ap->a_len; |
| 2591 | puffs_msg_setinfo(park_fallocate, PUFFSOP_VN, |
| 2592 | PUFFS_VN_FALLOCATE, VPTOPNC(vp)); |
| 2593 | |
| 2594 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fallocate, vp->v_data, NULL, error); |
| 2595 | error = checkerr(pmp, error, __func__); |
| 2596 | PUFFS_MSG_RELEASE(fallocate); |
| 2597 | |
| 2598 | switch (error) { |
| 2599 | case 0: |
| 2600 | break; |
| 2601 | case EAGAIN: |
| 2602 | error = EIO; |
| 2603 | /* FALLTHROUGH */ |
| 2604 | default: |
| 2605 | goto out; |
| 2606 | } |
| 2607 | |
| 2608 | if (ap->a_pos + ap->a_len > vp->v_size) { |
| 2609 | uvm_vnp_setsize(vp, ap->a_pos + ap->a_len); |
| 2610 | puffs_updatenode(pn, PUFFS_UPDATESIZE, vp->v_size); |
| 2611 | } |
| 2612 | out: |
| 2613 | mutex_exit(&pn->pn_sizemtx); |
| 2614 | |
| 2615 | return error; |
| 2616 | } |
| 2617 | |
| 2618 | int |
| 2619 | puffs_vnop_fdiscard(void *v) |
| 2620 | { |
| 2621 | struct vop_fdiscard_args /* { |
| 2622 | const struct vnodeop_desc *a_desc; |
| 2623 | struct vnode *a_vp; |
| 2624 | off_t a_pos; |
| 2625 | off_t a_len; |
| 2626 | } */ *ap = v; |
| 2627 | struct vnode *vp = ap->a_vp; |
| 2628 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2629 | PUFFS_MSG_VARS(vn, fdiscard); |
| 2630 | int error; |
| 2631 | |
| 2632 | PUFFS_MSG_ALLOC(vn, fdiscard); |
| 2633 | fdiscard_msg->pvnr_off = ap->a_pos; |
| 2634 | fdiscard_msg->pvnr_len = ap->a_len; |
| 2635 | puffs_msg_setinfo(park_fdiscard, PUFFSOP_VN, |
| 2636 | PUFFS_VN_FALLOCATE, VPTOPNC(vp)); |
| 2637 | |
| 2638 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fdiscard, vp->v_data, NULL, error); |
| 2639 | error = checkerr(pmp, error, __func__); |
| 2640 | PUFFS_MSG_RELEASE(fdiscard); |
| 2641 | |
| 2642 | return error; |
| 2643 | } |
| 2644 | |
| 2645 | int |
| 2646 | puffs_vnop_print(void *v) |
| 2647 | { |
| 2648 | struct vop_print_args /* { |
| 2649 | struct vnode *a_vp; |
| 2650 | } */ *ap = v; |
| 2651 | PUFFS_MSG_VARS(vn, print); |
| 2652 | struct vnode *vp = ap->a_vp; |
| 2653 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2654 | struct puffs_node *pn = vp->v_data; |
| 2655 | |
| 2656 | /* kernel portion */ |
| 2657 | printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" |
| 2658 | "\tuserspace cookie: %p" , vp, pn, pn->pn_cookie); |
| 2659 | if (vp->v_type == VFIFO) |
| 2660 | VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); |
| 2661 | printf("\n" ); |
| 2662 | |
| 2663 | /* userspace portion */ |
| 2664 | if (EXISTSOP(pmp, PRINT)) { |
| 2665 | PUFFS_MSG_ALLOC(vn, print); |
| 2666 | puffs_msg_setinfo(park_print, PUFFSOP_VN, |
| 2667 | PUFFS_VN_PRINT, VPTOPNC(vp)); |
| 2668 | PUFFS_MSG_ENQUEUEWAIT2_NOERROR(pmp, park_print, vp->v_data, |
| 2669 | NULL); |
| 2670 | PUFFS_MSG_RELEASE(print); |
| 2671 | } |
| 2672 | |
| 2673 | return 0; |
| 2674 | } |
| 2675 | |
| 2676 | int |
| 2677 | puffs_vnop_pathconf(void *v) |
| 2678 | { |
| 2679 | struct vop_pathconf_args /* { |
| 2680 | const struct vnodeop_desc *a_desc; |
| 2681 | struct vnode *a_vp; |
| 2682 | int a_name; |
| 2683 | register_t *a_retval; |
| 2684 | } */ *ap = v; |
| 2685 | PUFFS_MSG_VARS(vn, pathconf); |
| 2686 | struct vnode *vp = ap->a_vp; |
| 2687 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2688 | int error; |
| 2689 | |
| 2690 | PUFFS_MSG_ALLOC(vn, pathconf); |
| 2691 | pathconf_msg->pvnr_name = ap->a_name; |
| 2692 | puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, |
| 2693 | PUFFS_VN_PATHCONF, VPTOPNC(vp)); |
| 2694 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); |
| 2695 | error = checkerr(pmp, error, __func__); |
| 2696 | if (!error) |
| 2697 | *ap->a_retval = pathconf_msg->pvnr_retval; |
| 2698 | PUFFS_MSG_RELEASE(pathconf); |
| 2699 | |
| 2700 | return error; |
| 2701 | } |
| 2702 | |
| 2703 | int |
| 2704 | puffs_vnop_advlock(void *v) |
| 2705 | { |
| 2706 | struct vop_advlock_args /* { |
| 2707 | const struct vnodeop_desc *a_desc; |
| 2708 | struct vnode *a_vp; |
| 2709 | void *a_id; |
| 2710 | int a_op; |
| 2711 | struct flock *a_fl; |
| 2712 | int a_flags; |
| 2713 | } */ *ap = v; |
| 2714 | PUFFS_MSG_VARS(vn, advlock); |
| 2715 | struct vnode *vp = ap->a_vp; |
| 2716 | struct puffs_node *pn = VPTOPP(vp); |
| 2717 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2718 | int error; |
| 2719 | |
| 2720 | if (!EXISTSOP(pmp, ADVLOCK)) |
| 2721 | return lf_advlock(ap, &pn->pn_lockf, vp->v_size); |
| 2722 | |
| 2723 | PUFFS_MSG_ALLOC(vn, advlock); |
| 2724 | (void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl, |
| 2725 | sizeof(advlock_msg->pvnr_fl)); |
| 2726 | advlock_msg->pvnr_id = ap->a_id; |
| 2727 | advlock_msg->pvnr_op = ap->a_op; |
| 2728 | advlock_msg->pvnr_flags = ap->a_flags; |
| 2729 | puffs_msg_setinfo(park_advlock, PUFFSOP_VN, |
| 2730 | PUFFS_VN_ADVLOCK, VPTOPNC(vp)); |
| 2731 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); |
| 2732 | error = checkerr(pmp, error, __func__); |
| 2733 | PUFFS_MSG_RELEASE(advlock); |
| 2734 | |
| 2735 | return error; |
| 2736 | } |
| 2737 | |
| 2738 | int |
| 2739 | puffs_vnop_abortop(void *v) |
| 2740 | { |
| 2741 | struct vop_abortop_args /* { |
| 2742 | struct vnode *a_dvp; |
| 2743 | struct componentname *a_cnp; |
| 2744 | }; */ *ap = v; |
| 2745 | PUFFS_MSG_VARS(vn, abortop); |
| 2746 | struct vnode *dvp = ap->a_dvp; |
| 2747 | struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); |
| 2748 | struct componentname *cnp = ap->a_cnp; |
| 2749 | |
| 2750 | if (EXISTSOP(pmp, ABORTOP)) { |
| 2751 | PUFFS_MSG_ALLOC(vn, abortop); |
| 2752 | puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, |
| 2753 | cnp, PUFFS_USE_FULLPNBUF(pmp)); |
| 2754 | puffs_msg_setfaf(park_abortop); |
| 2755 | puffs_msg_setinfo(park_abortop, PUFFSOP_VN, |
| 2756 | PUFFS_VN_ABORTOP, VPTOPNC(dvp)); |
| 2757 | |
| 2758 | puffs_msg_enqueue(pmp, park_abortop); |
| 2759 | PUFFS_MSG_RELEASE(abortop); |
| 2760 | } |
| 2761 | |
| 2762 | return genfs_abortop(v); |
| 2763 | } |
| 2764 | |
| 2765 | #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) |
| 2766 | |
| 2767 | /* |
| 2768 | * This maps itself to PUFFS_VN_READ/WRITE for data transfer. |
| 2769 | */ |
| 2770 | int |
| 2771 | puffs_vnop_strategy(void *v) |
| 2772 | { |
| 2773 | struct vop_strategy_args /* { |
| 2774 | const struct vnodeop_desc *a_desc; |
| 2775 | struct vnode *a_vp; |
| 2776 | struct buf *a_bp; |
| 2777 | } */ *ap = v; |
| 2778 | PUFFS_MSG_VARS(vn, rw); |
| 2779 | struct vnode *vp = ap->a_vp; |
| 2780 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2781 | struct puffs_node *pn; |
| 2782 | struct buf *bp; |
| 2783 | size_t argsize; |
| 2784 | size_t tomove, moved; |
| 2785 | int error, dofaf, cansleep, dobiodone; |
| 2786 | |
| 2787 | pmp = MPTOPUFFSMP(vp->v_mount); |
| 2788 | bp = ap->a_bp; |
| 2789 | error = 0; |
| 2790 | dofaf = 0; |
| 2791 | cansleep = 0; |
| 2792 | pn = VPTOPP(vp); |
| 2793 | park_rw = NULL; /* explicit */ |
| 2794 | dobiodone = 1; |
| 2795 | |
| 2796 | if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) |
| 2797 | || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) |
| 2798 | ERROUT(EOPNOTSUPP); |
| 2799 | |
| 2800 | /* |
| 2801 | * Short-circuit optimization: don't flush buffer in between |
| 2802 | * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. |
| 2803 | */ |
| 2804 | if (pn->pn_stat & PNODE_DYING) { |
| 2805 | KASSERT(BUF_ISWRITE(bp)); |
| 2806 | bp->b_resid = 0; |
| 2807 | goto out; |
| 2808 | } |
| 2809 | |
| 2810 | #ifdef DIAGNOSTIC |
| 2811 | if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) |
| 2812 | panic("puffs_strategy: wildly inappropriate buf bcount %d" , |
| 2813 | bp->b_bcount); |
| 2814 | #endif |
| 2815 | |
| 2816 | /* |
| 2817 | * See explanation for the necessity of a FAF in puffs_fsync. |
| 2818 | * |
| 2819 | * Also, do FAF in case we're suspending. |
| 2820 | * See puffs_vfsops.c:pageflush() |
| 2821 | */ |
| 2822 | if (BUF_ISWRITE(bp)) { |
| 2823 | mutex_enter(vp->v_interlock); |
| 2824 | if (vdead_check(vp, VDEAD_NOWAIT) != 0) |
| 2825 | dofaf = 1; |
| 2826 | if (pn->pn_stat & PNODE_FAF) |
| 2827 | dofaf = 1; |
| 2828 | mutex_exit(vp->v_interlock); |
| 2829 | } |
| 2830 | |
| 2831 | cansleep = (curlwp == uvm.pagedaemon_lwp || dofaf) ? 0 : 1; |
| 2832 | |
| 2833 | KASSERT(curlwp != uvm.pagedaemon_lwp || dofaf || BIOASYNC(bp)); |
| 2834 | |
| 2835 | /* allocate transport structure */ |
| 2836 | tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); |
| 2837 | argsize = sizeof(struct puffs_vnmsg_rw); |
| 2838 | error = puffs_msgmem_alloc(argsize + tomove, &park_rw, |
| 2839 | (void *)&rw_msg, cansleep); |
| 2840 | if (error) |
| 2841 | goto out; |
| 2842 | RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); |
| 2843 | |
| 2844 | /* 2x2 cases: read/write, faf/nofaf */ |
| 2845 | if (BUF_ISREAD(bp)) { |
| 2846 | puffs_msg_setinfo(park_rw, PUFFSOP_VN, |
| 2847 | PUFFS_VN_READ, VPTOPNC(vp)); |
| 2848 | puffs_msg_setdelta(park_rw, tomove); |
| 2849 | if (BIOASYNC(bp)) { |
| 2850 | puffs_msg_setcall(park_rw, |
| 2851 | puffs_parkdone_asyncbioread, bp); |
| 2852 | puffs_msg_enqueue(pmp, park_rw); |
| 2853 | dobiodone = 0; |
| 2854 | } else { |
| 2855 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, |
| 2856 | NULL, error); |
| 2857 | error = checkerr(pmp, error, __func__); |
| 2858 | if (error) |
| 2859 | goto out; |
| 2860 | |
| 2861 | if (rw_msg->pvnr_resid > tomove) { |
| 2862 | puffs_senderr(pmp, PUFFS_ERR_READ, |
| 2863 | E2BIG, "resid grew" , VPTOPNC(vp)); |
| 2864 | ERROUT(EPROTO); |
| 2865 | } |
| 2866 | |
| 2867 | moved = tomove - rw_msg->pvnr_resid; |
| 2868 | |
| 2869 | (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); |
| 2870 | bp->b_resid = bp->b_bcount - moved; |
| 2871 | } |
| 2872 | } else { |
| 2873 | puffs_msg_setinfo(park_rw, PUFFSOP_VN, |
| 2874 | PUFFS_VN_WRITE, VPTOPNC(vp)); |
| 2875 | /* |
| 2876 | * make pages read-only before we write them if we want |
| 2877 | * write caching info |
| 2878 | */ |
| 2879 | if (PUFFS_WCACHEINFO(pmp)) { |
| 2880 | struct uvm_object *uobj = &vp->v_uobj; |
| 2881 | int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; |
| 2882 | struct vm_page *vmp; |
| 2883 | int i; |
| 2884 | |
| 2885 | for (i = 0; i < npages; i++) { |
| 2886 | vmp= uvm_pageratop((vaddr_t)bp->b_data |
| 2887 | + (i << PAGE_SHIFT)); |
| 2888 | DPRINTF(("puffs_strategy: write-protecting " |
| 2889 | "vp %p page %p, offset %" PRId64"\n" , |
| 2890 | vp, vmp, vmp->offset)); |
| 2891 | mutex_enter(uobj->vmobjlock); |
| 2892 | vmp->flags |= PG_RDONLY; |
| 2893 | pmap_page_protect(vmp, VM_PROT_READ); |
| 2894 | mutex_exit(uobj->vmobjlock); |
| 2895 | } |
| 2896 | } |
| 2897 | |
| 2898 | (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); |
| 2899 | if (dofaf) { |
| 2900 | puffs_msg_setfaf(park_rw); |
| 2901 | } else if (BIOASYNC(bp)) { |
| 2902 | puffs_msg_setcall(park_rw, |
| 2903 | puffs_parkdone_asyncbiowrite, bp); |
| 2904 | dobiodone = 0; |
| 2905 | } |
| 2906 | |
| 2907 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); |
| 2908 | |
| 2909 | if (dobiodone == 0) |
| 2910 | goto out; |
| 2911 | |
| 2912 | error = checkerr(pmp, error, __func__); |
| 2913 | if (error) |
| 2914 | goto out; |
| 2915 | |
| 2916 | if (rw_msg->pvnr_resid > tomove) { |
| 2917 | puffs_senderr(pmp, PUFFS_ERR_WRITE, |
| 2918 | E2BIG, "resid grew" , VPTOPNC(vp)); |
| 2919 | ERROUT(EPROTO); |
| 2920 | } |
| 2921 | |
| 2922 | /* |
| 2923 | * FAF moved everything. Frankly, we don't |
| 2924 | * really have a choice. |
| 2925 | */ |
| 2926 | if (dofaf && error == 0) |
| 2927 | moved = tomove; |
| 2928 | else |
| 2929 | moved = tomove - rw_msg->pvnr_resid; |
| 2930 | |
| 2931 | bp->b_resid = bp->b_bcount - moved; |
| 2932 | if (bp->b_resid != 0) { |
| 2933 | ERROUT(EIO); |
| 2934 | } |
| 2935 | } |
| 2936 | |
| 2937 | out: |
| 2938 | if (park_rw) |
| 2939 | puffs_msgmem_release(park_rw); |
| 2940 | |
| 2941 | if (error) |
| 2942 | bp->b_error = error; |
| 2943 | |
| 2944 | if (error || dobiodone) |
| 2945 | biodone(bp); |
| 2946 | |
| 2947 | return error; |
| 2948 | } |
| 2949 | |
| 2950 | int |
| 2951 | puffs_vnop_mmap(void *v) |
| 2952 | { |
| 2953 | struct vop_mmap_args /* { |
| 2954 | const struct vnodeop_desc *a_desc; |
| 2955 | struct vnode *a_vp; |
| 2956 | vm_prot_t a_prot; |
| 2957 | kauth_cred_t a_cred; |
| 2958 | } */ *ap = v; |
| 2959 | PUFFS_MSG_VARS(vn, mmap); |
| 2960 | struct vnode *vp = ap->a_vp; |
| 2961 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 2962 | int error; |
| 2963 | |
| 2964 | if (!PUFFS_USE_PAGECACHE(pmp)) |
| 2965 | return genfs_eopnotsupp(v); |
| 2966 | |
| 2967 | if (EXISTSOP(pmp, MMAP)) { |
| 2968 | PUFFS_MSG_ALLOC(vn, mmap); |
| 2969 | mmap_msg->pvnr_prot = ap->a_prot; |
| 2970 | puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); |
| 2971 | puffs_msg_setinfo(park_mmap, PUFFSOP_VN, |
| 2972 | PUFFS_VN_MMAP, VPTOPNC(vp)); |
| 2973 | |
| 2974 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); |
| 2975 | error = checkerr(pmp, error, __func__); |
| 2976 | PUFFS_MSG_RELEASE(mmap); |
| 2977 | } else { |
| 2978 | error = genfs_mmap(v); |
| 2979 | } |
| 2980 | |
| 2981 | return error; |
| 2982 | } |
| 2983 | |
| 2984 | |
| 2985 | /* |
| 2986 | * The rest don't get a free trip to userspace and back, they |
| 2987 | * have to stay within the kernel. |
| 2988 | */ |
| 2989 | |
| 2990 | /* |
| 2991 | * bmap doesn't really make any sense for puffs, so just 1:1 map it. |
| 2992 | * well, maybe somehow, somewhere, some day .... |
| 2993 | */ |
| 2994 | int |
| 2995 | puffs_vnop_bmap(void *v) |
| 2996 | { |
| 2997 | struct vop_bmap_args /* { |
| 2998 | const struct vnodeop_desc *a_desc; |
| 2999 | struct vnode *a_vp; |
| 3000 | daddr_t a_bn; |
| 3001 | struct vnode **a_vpp; |
| 3002 | daddr_t *a_bnp; |
| 3003 | int *a_runp; |
| 3004 | } */ *ap = v; |
| 3005 | struct puffs_mount *pmp; |
| 3006 | |
| 3007 | pmp = MPTOPUFFSMP(ap->a_vp->v_mount); |
| 3008 | |
| 3009 | if (ap->a_vpp) |
| 3010 | *ap->a_vpp = ap->a_vp; |
| 3011 | if (ap->a_bnp) |
| 3012 | *ap->a_bnp = ap->a_bn; |
| 3013 | if (ap->a_runp) |
| 3014 | *ap->a_runp |
| 3015 | = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; |
| 3016 | |
| 3017 | return 0; |
| 3018 | } |
| 3019 | |
| 3020 | /* |
| 3021 | * Handle getpages faults in puffs. We let genfs_getpages() do most |
| 3022 | * of the dirty work, but we come in this route to do accounting tasks. |
| 3023 | * If the user server has specified functions for cache notifications |
| 3024 | * about reads and/or writes, we record which type of operation we got, |
| 3025 | * for which page range, and proceed to issue a FAF notification to the |
| 3026 | * server about it. |
| 3027 | */ |
| 3028 | int |
| 3029 | puffs_vnop_getpages(void *v) |
| 3030 | { |
| 3031 | struct vop_getpages_args /* { |
| 3032 | const struct vnodeop_desc *a_desc; |
| 3033 | struct vnode *a_vp; |
| 3034 | voff_t a_offset; |
| 3035 | struct vm_page **a_m; |
| 3036 | int *a_count; |
| 3037 | int a_centeridx; |
| 3038 | vm_prot_t a_access_type; |
| 3039 | int a_advice; |
| 3040 | int a_flags; |
| 3041 | } */ *ap = v; |
| 3042 | struct puffs_mount *pmp; |
| 3043 | struct puffs_node *pn; |
| 3044 | struct vnode *vp; |
| 3045 | struct vm_page **pgs; |
| 3046 | struct puffs_cacheinfo *pcinfo = NULL; |
| 3047 | struct puffs_cacherun *pcrun; |
| 3048 | void *parkmem = NULL; |
| 3049 | size_t runsizes; |
| 3050 | int i, npages, si, streakon; |
| 3051 | int error, locked, write; |
| 3052 | |
| 3053 | pmp = MPTOPUFFSMP(ap->a_vp->v_mount); |
| 3054 | npages = *ap->a_count; |
| 3055 | pgs = ap->a_m; |
| 3056 | vp = ap->a_vp; |
| 3057 | pn = vp->v_data; |
| 3058 | locked = (ap->a_flags & PGO_LOCKED) != 0; |
| 3059 | write = (ap->a_access_type & VM_PROT_WRITE) != 0; |
| 3060 | |
| 3061 | /* ccg xnaht - gets Wuninitialized wrong */ |
| 3062 | pcrun = NULL; |
| 3063 | runsizes = 0; |
| 3064 | |
| 3065 | /* |
| 3066 | * Check that we aren't trying to fault in pages which our file |
| 3067 | * server doesn't know about. This happens if we extend a file by |
| 3068 | * skipping some pages and later try to fault in pages which |
| 3069 | * are between pn_serversize and vp_size. This check optimizes |
| 3070 | * away the common case where a file is being extended. |
| 3071 | */ |
| 3072 | if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { |
| 3073 | struct vattr va; |
| 3074 | |
| 3075 | /* try again later when we can block */ |
| 3076 | if (locked) |
| 3077 | ERROUT(EBUSY); |
| 3078 | |
| 3079 | mutex_exit(vp->v_interlock); |
| 3080 | vattr_null(&va); |
| 3081 | va.va_size = vp->v_size; |
| 3082 | error = dosetattr(vp, &va, FSCRED, 0); |
| 3083 | if (error) |
| 3084 | ERROUT(error); |
| 3085 | mutex_enter(vp->v_interlock); |
| 3086 | } |
| 3087 | |
| 3088 | if (write && PUFFS_WCACHEINFO(pmp)) { |
| 3089 | #ifdef notnowjohn |
| 3090 | /* allocate worst-case memory */ |
| 3091 | runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); |
| 3092 | KASSERT(curlwp != uvm.pagedaemon_lwp || locked); |
| 3093 | pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, |
| 3094 | locked ? KM_NOSLEEP : KM_SLEEP); |
| 3095 | |
| 3096 | /* |
| 3097 | * can't block if we're locked and can't mess up caching |
| 3098 | * information for fs server. so come back later, please |
| 3099 | */ |
| 3100 | if (pcinfo == NULL) |
| 3101 | ERROUT(ENOMEM); |
| 3102 | |
| 3103 | parkmem = puffs_park_alloc(locked == 0); |
| 3104 | if (parkmem == NULL) |
| 3105 | ERROUT(ENOMEM); |
| 3106 | |
| 3107 | pcrun = pcinfo->pcache_runs; |
| 3108 | #else |
| 3109 | (void)parkmem; |
| 3110 | #endif |
| 3111 | } |
| 3112 | |
| 3113 | error = genfs_getpages(v); |
| 3114 | if (error) |
| 3115 | goto out; |
| 3116 | |
| 3117 | if (PUFFS_WCACHEINFO(pmp) == 0) |
| 3118 | goto out; |
| 3119 | |
| 3120 | /* |
| 3121 | * Let's see whose fault it was and inform the user server of |
| 3122 | * possibly read/written pages. Map pages from read faults |
| 3123 | * strictly read-only, since otherwise we might miss info on |
| 3124 | * when the page is actually write-faulted to. |
| 3125 | */ |
| 3126 | if (!locked) |
| 3127 | mutex_enter(vp->v_uobj.vmobjlock); |
| 3128 | for (i = 0, si = 0, streakon = 0; i < npages; i++) { |
| 3129 | if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { |
| 3130 | if (streakon && write) { |
| 3131 | streakon = 0; |
| 3132 | pcrun[si].pcache_runend |
| 3133 | = trunc_page(pgs[i]->offset) + PAGE_MASK; |
| 3134 | si++; |
| 3135 | } |
| 3136 | continue; |
| 3137 | } |
| 3138 | if (streakon == 0 && write) { |
| 3139 | streakon = 1; |
| 3140 | pcrun[si].pcache_runstart = pgs[i]->offset; |
| 3141 | } |
| 3142 | |
| 3143 | if (!write) |
| 3144 | pgs[i]->flags |= PG_RDONLY; |
| 3145 | } |
| 3146 | /* was the last page part of our streak? */ |
| 3147 | if (streakon) { |
| 3148 | pcrun[si].pcache_runend |
| 3149 | = trunc_page(pgs[i-1]->offset) + PAGE_MASK; |
| 3150 | si++; |
| 3151 | } |
| 3152 | if (!locked) |
| 3153 | mutex_exit(vp->v_uobj.vmobjlock); |
| 3154 | |
| 3155 | KASSERT(si <= (npages / 2) + 1); |
| 3156 | |
| 3157 | #ifdef notnowjohn |
| 3158 | /* send results to userspace */ |
| 3159 | if (write) |
| 3160 | puffs_cacheop(pmp, parkmem, pcinfo, |
| 3161 | sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); |
| 3162 | #endif |
| 3163 | |
| 3164 | out: |
| 3165 | if (error) { |
| 3166 | if (pcinfo != NULL) |
| 3167 | kmem_free(pcinfo, |
| 3168 | sizeof(struct puffs_cacheinfo) + runsizes); |
| 3169 | #ifdef notnowjohn |
| 3170 | if (parkmem != NULL) |
| 3171 | puffs_park_release(parkmem, 1); |
| 3172 | #endif |
| 3173 | } |
| 3174 | |
| 3175 | return error; |
| 3176 | } |
| 3177 | |
| 3178 | /* |
| 3179 | * Extended attribute support. |
| 3180 | */ |
| 3181 | |
| 3182 | int |
| 3183 | puffs_vnop_getextattr(void *v) |
| 3184 | { |
| 3185 | struct vop_getextattr_args /* |
| 3186 | struct vnode *a_vp; |
| 3187 | int a_attrnamespace; |
| 3188 | const char *a_name; |
| 3189 | struct uio *a_uio; |
| 3190 | size_t *a_size; |
| 3191 | kauth_cred_t a_cred; |
| 3192 | }; */ *ap = v; |
| 3193 | PUFFS_MSG_VARS(vn, getextattr); |
| 3194 | struct vnode *vp = ap->a_vp; |
| 3195 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 3196 | int attrnamespace = ap->a_attrnamespace; |
| 3197 | const char *name = ap->a_name; |
| 3198 | struct uio *uio = ap->a_uio; |
| 3199 | size_t *sizep = ap->a_size; |
| 3200 | size_t tomove, resid; |
| 3201 | int error; |
| 3202 | |
| 3203 | if (uio) |
| 3204 | resid = uio->uio_resid; |
| 3205 | else |
| 3206 | resid = 0; |
| 3207 | |
| 3208 | tomove = PUFFS_TOMOVE(resid, pmp); |
| 3209 | if (tomove != resid) { |
| 3210 | error = E2BIG; |
| 3211 | goto out; |
| 3212 | } |
| 3213 | |
| 3214 | puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_getextattr) + tomove, |
| 3215 | &park_getextattr, (void *)&getextattr_msg, 1); |
| 3216 | |
| 3217 | getextattr_msg->pvnr_attrnamespace = attrnamespace; |
| 3218 | strlcpy(getextattr_msg->pvnr_attrname, name, |
| 3219 | sizeof(getextattr_msg->pvnr_attrname)); |
| 3220 | puffs_credcvt(&getextattr_msg->pvnr_cred, ap->a_cred); |
| 3221 | if (sizep) |
| 3222 | getextattr_msg->pvnr_datasize = 1; |
| 3223 | getextattr_msg->pvnr_resid = tomove; |
| 3224 | |
| 3225 | puffs_msg_setinfo(park_getextattr, |
| 3226 | PUFFSOP_VN, PUFFS_VN_GETEXTATTR, VPTOPNC(vp)); |
| 3227 | puffs_msg_setdelta(park_getextattr, tomove); |
| 3228 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getextattr, vp->v_data, NULL, error); |
| 3229 | |
| 3230 | error = checkerr(pmp, error, __func__); |
| 3231 | if (error) |
| 3232 | goto out; |
| 3233 | |
| 3234 | resid = getextattr_msg->pvnr_resid; |
| 3235 | if (resid > tomove) { |
| 3236 | puffs_senderr(pmp, PUFFS_ERR_GETEXTATTR, E2BIG, |
| 3237 | "resid grew" , VPTOPNC(vp)); |
| 3238 | error = EPROTO; |
| 3239 | goto out; |
| 3240 | } |
| 3241 | |
| 3242 | if (sizep) |
| 3243 | *sizep = getextattr_msg->pvnr_datasize; |
| 3244 | if (uio) |
| 3245 | error = uiomove(getextattr_msg->pvnr_data, tomove - resid, uio); |
| 3246 | |
| 3247 | out: |
| 3248 | PUFFS_MSG_RELEASE(getextattr); |
| 3249 | return error; |
| 3250 | } |
| 3251 | |
| 3252 | int |
| 3253 | puffs_vnop_setextattr(void *v) |
| 3254 | { |
| 3255 | struct vop_setextattr_args /* { |
| 3256 | struct vnode *a_vp; |
| 3257 | int a_attrnamespace; |
| 3258 | const char *a_name; |
| 3259 | struct uio *a_uio; |
| 3260 | kauth_cred_t a_cred; |
| 3261 | }; */ *ap = v; |
| 3262 | PUFFS_MSG_VARS(vn, setextattr); |
| 3263 | struct vnode *vp = ap->a_vp; |
| 3264 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 3265 | int attrnamespace = ap->a_attrnamespace; |
| 3266 | const char *name = ap->a_name; |
| 3267 | struct uio *uio = ap->a_uio; |
| 3268 | size_t tomove, resid; |
| 3269 | int error; |
| 3270 | |
| 3271 | if (uio) |
| 3272 | resid = uio->uio_resid; |
| 3273 | else |
| 3274 | resid = 0; |
| 3275 | |
| 3276 | tomove = PUFFS_TOMOVE(resid, pmp); |
| 3277 | if (tomove != resid) { |
| 3278 | error = E2BIG; |
| 3279 | goto out; |
| 3280 | } |
| 3281 | |
| 3282 | puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_setextattr) + tomove, |
| 3283 | &park_setextattr, (void *)&setextattr_msg, 1); |
| 3284 | |
| 3285 | setextattr_msg->pvnr_attrnamespace = attrnamespace; |
| 3286 | strlcpy(setextattr_msg->pvnr_attrname, name, |
| 3287 | sizeof(setextattr_msg->pvnr_attrname)); |
| 3288 | puffs_credcvt(&setextattr_msg->pvnr_cred, ap->a_cred); |
| 3289 | setextattr_msg->pvnr_resid = tomove; |
| 3290 | |
| 3291 | if (uio) { |
| 3292 | error = uiomove(setextattr_msg->pvnr_data, tomove, uio); |
| 3293 | if (error) |
| 3294 | goto out; |
| 3295 | } |
| 3296 | |
| 3297 | puffs_msg_setinfo(park_setextattr, |
| 3298 | PUFFSOP_VN, PUFFS_VN_SETEXTATTR, VPTOPNC(vp)); |
| 3299 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setextattr, vp->v_data, NULL, error); |
| 3300 | |
| 3301 | error = checkerr(pmp, error, __func__); |
| 3302 | if (error) |
| 3303 | goto out; |
| 3304 | |
| 3305 | if (setextattr_msg->pvnr_resid != 0) |
| 3306 | error = EIO; |
| 3307 | |
| 3308 | out: |
| 3309 | PUFFS_MSG_RELEASE(setextattr); |
| 3310 | |
| 3311 | return error; |
| 3312 | } |
| 3313 | |
| 3314 | int |
| 3315 | puffs_vnop_listextattr(void *v) |
| 3316 | { |
| 3317 | struct vop_listextattr_args /* { |
| 3318 | struct vnode *a_vp; |
| 3319 | int a_attrnamespace; |
| 3320 | struct uio *a_uio; |
| 3321 | size_t *a_size; |
| 3322 | int a_flag, |
| 3323 | kauth_cred_t a_cred; |
| 3324 | }; */ *ap = v; |
| 3325 | PUFFS_MSG_VARS(vn, listextattr); |
| 3326 | struct vnode *vp = ap->a_vp; |
| 3327 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 3328 | int attrnamespace = ap->a_attrnamespace; |
| 3329 | struct uio *uio = ap->a_uio; |
| 3330 | size_t *sizep = ap->a_size; |
| 3331 | int flag = ap->a_flag; |
| 3332 | size_t tomove, resid; |
| 3333 | int error; |
| 3334 | |
| 3335 | if (uio) |
| 3336 | resid = uio->uio_resid; |
| 3337 | else |
| 3338 | resid = 0; |
| 3339 | |
| 3340 | tomove = PUFFS_TOMOVE(resid, pmp); |
| 3341 | if (tomove != resid) { |
| 3342 | error = E2BIG; |
| 3343 | goto out; |
| 3344 | } |
| 3345 | |
| 3346 | puffs_msgmem_alloc(sizeof(struct puffs_vnmsg_listextattr) + tomove, |
| 3347 | &park_listextattr, (void *)&listextattr_msg, 1); |
| 3348 | |
| 3349 | listextattr_msg->pvnr_attrnamespace = attrnamespace; |
| 3350 | listextattr_msg->pvnr_flag = flag; |
| 3351 | puffs_credcvt(&listextattr_msg->pvnr_cred, ap->a_cred); |
| 3352 | listextattr_msg->pvnr_resid = tomove; |
| 3353 | if (sizep) |
| 3354 | listextattr_msg->pvnr_datasize = 1; |
| 3355 | |
| 3356 | puffs_msg_setinfo(park_listextattr, |
| 3357 | PUFFSOP_VN, PUFFS_VN_LISTEXTATTR, VPTOPNC(vp)); |
| 3358 | puffs_msg_setdelta(park_listextattr, tomove); |
| 3359 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_listextattr, vp->v_data, NULL, error); |
| 3360 | |
| 3361 | error = checkerr(pmp, error, __func__); |
| 3362 | if (error) |
| 3363 | goto out; |
| 3364 | |
| 3365 | resid = listextattr_msg->pvnr_resid; |
| 3366 | if (resid > tomove) { |
| 3367 | puffs_senderr(pmp, PUFFS_ERR_LISTEXTATTR, E2BIG, |
| 3368 | "resid grew" , VPTOPNC(vp)); |
| 3369 | error = EPROTO; |
| 3370 | goto out; |
| 3371 | } |
| 3372 | |
| 3373 | if (sizep) |
| 3374 | *sizep = listextattr_msg->pvnr_datasize; |
| 3375 | if (uio) |
| 3376 | error = uiomove(listextattr_msg->pvnr_data, tomove-resid, uio); |
| 3377 | |
| 3378 | out: |
| 3379 | PUFFS_MSG_RELEASE(listextattr); |
| 3380 | return error; |
| 3381 | } |
| 3382 | |
| 3383 | int |
| 3384 | puffs_vnop_deleteextattr(void *v) |
| 3385 | { |
| 3386 | struct vop_deleteextattr_args /* { |
| 3387 | struct vnode *a_vp; |
| 3388 | int a_attrnamespace; |
| 3389 | const char *a_name; |
| 3390 | kauth_cred_t a_cred; |
| 3391 | }; */ *ap = v; |
| 3392 | PUFFS_MSG_VARS(vn, deleteextattr); |
| 3393 | struct vnode *vp = ap->a_vp; |
| 3394 | struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); |
| 3395 | int attrnamespace = ap->a_attrnamespace; |
| 3396 | const char *name = ap->a_name; |
| 3397 | int error; |
| 3398 | |
| 3399 | PUFFS_MSG_ALLOC(vn, deleteextattr); |
| 3400 | deleteextattr_msg->pvnr_attrnamespace = attrnamespace; |
| 3401 | strlcpy(deleteextattr_msg->pvnr_attrname, name, |
| 3402 | sizeof(deleteextattr_msg->pvnr_attrname)); |
| 3403 | puffs_credcvt(&deleteextattr_msg->pvnr_cred, ap->a_cred); |
| 3404 | |
| 3405 | puffs_msg_setinfo(park_deleteextattr, |
| 3406 | PUFFSOP_VN, PUFFS_VN_DELETEEXTATTR, VPTOPNC(vp)); |
| 3407 | PUFFS_MSG_ENQUEUEWAIT2(pmp, park_deleteextattr, |
| 3408 | vp->v_data, NULL, error); |
| 3409 | |
| 3410 | error = checkerr(pmp, error, __func__); |
| 3411 | |
| 3412 | PUFFS_MSG_RELEASE(deleteextattr); |
| 3413 | return error; |
| 3414 | } |
| 3415 | |
| 3416 | /* |
| 3417 | * spec & fifo. These call the miscfs spec and fifo vectors, but issue |
| 3418 | * FAF update information for the puffs node first. |
| 3419 | */ |
| 3420 | int |
| 3421 | puffs_vnop_spec_read(void *v) |
| 3422 | { |
| 3423 | struct vop_read_args /* { |
| 3424 | const struct vnodeop_desc *a_desc; |
| 3425 | struct vnode *a_vp; |
| 3426 | struct uio *a_uio; |
| 3427 | int a_ioflag; |
| 3428 | kauth_cred_t a_cred; |
| 3429 | } */ *ap = v; |
| 3430 | |
| 3431 | puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); |
| 3432 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); |
| 3433 | } |
| 3434 | |
| 3435 | int |
| 3436 | puffs_vnop_spec_write(void *v) |
| 3437 | { |
| 3438 | struct vop_write_args /* { |
| 3439 | const struct vnodeop_desc *a_desc; |
| 3440 | struct vnode *a_vp; |
| 3441 | struct uio *a_uio; |
| 3442 | int a_ioflag; |
| 3443 | kauth_cred_t a_cred; |
| 3444 | } */ *ap = v; |
| 3445 | |
| 3446 | puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); |
| 3447 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); |
| 3448 | } |
| 3449 | |
| 3450 | int |
| 3451 | puffs_vnop_fifo_read(void *v) |
| 3452 | { |
| 3453 | struct vop_read_args /* { |
| 3454 | const struct vnodeop_desc *a_desc; |
| 3455 | struct vnode *a_vp; |
| 3456 | struct uio *a_uio; |
| 3457 | int a_ioflag; |
| 3458 | kauth_cred_t a_cred; |
| 3459 | } */ *ap = v; |
| 3460 | |
| 3461 | puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); |
| 3462 | return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); |
| 3463 | } |
| 3464 | |
| 3465 | int |
| 3466 | puffs_vnop_fifo_write(void *v) |
| 3467 | { |
| 3468 | struct vop_write_args /* { |
| 3469 | const struct vnodeop_desc *a_desc; |
| 3470 | struct vnode *a_vp; |
| 3471 | struct uio *a_uio; |
| 3472 | int a_ioflag; |
| 3473 | kauth_cred_t a_cred; |
| 3474 | } */ *ap = v; |
| 3475 | |
| 3476 | puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); |
| 3477 | return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); |
| 3478 | } |
| 3479 | |