sysvbfs_vfsops.c revision 1.8.4.5
1 /* $NetBSD: sysvbfs_vfsops.c,v 1.8.4.5 2007/08/20 21:26:11 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: sysvbfs_vfsops.c,v 1.8.4.5 2007/08/20 21:26:11 ad Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/pool.h> 46 #include <sys/time.h> 47 #include <sys/ucred.h> 48 #include <sys/mount.h> 49 #include <sys/disklabel.h> 50 #include <sys/fcntl.h> 51 #include <sys/malloc.h> 52 #include <sys/kauth.h> 53 #include <sys/proc.h> 54 55 /* v-node */ 56 #include <sys/namei.h> 57 #include <sys/vnode.h> 58 /* devsw */ 59 #include <sys/conf.h> 60 61 #include <fs/sysvbfs/sysvbfs.h> /* external interface */ 62 #include <fs/sysvbfs/bfs.h> /* internal interface */ 63 64 #ifdef SYSVBFS_VNOPS_DEBUG 65 #define DPRINTF(fmt, args...) printf(fmt, ##args) 66 #else 67 #define DPRINTF(arg...) ((void)0) 68 #endif 69 70 MALLOC_JUSTDEFINE(M_SYSVBFS_VFS, "sysvbfs vfs", "sysvbfs vfs structures"); 71 72 struct pool sysvbfs_node_pool; 73 74 int sysvbfs_mountfs(struct vnode *, struct mount *, struct lwp *); 75 76 int 77 sysvbfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len, 78 struct lwp *l) 79 { 80 struct nameidata nd; 81 struct sysvbfs_args *args = data; 82 struct sysvbfs_mount *bmp = NULL; 83 struct vnode *devvp = NULL; 84 int error; 85 bool update; 86 87 DPRINTF("%s: mnt_flag=%x\n", __FUNCTION__, mp->mnt_flag); 88 89 if (*data_len < sizeof *args) 90 return EINVAL; 91 92 if (mp->mnt_flag & MNT_GETARGS) { 93 if ((bmp = (void *)mp->mnt_data) == NULL) 94 return EIO; 95 args->fspec = NULL; 96 *data_len = sizeof *args; 97 return 0; 98 } 99 100 101 DPRINTF("%s: args->fspec=%s\n", __FUNCTION__, args->fspec); 102 update = mp->mnt_flag & MNT_UPDATE; 103 if (args->fspec == NULL) { 104 /* nothing to do. */ 105 return EINVAL; 106 } 107 108 if (args->fspec != NULL) { 109 /* Look up the name and verify that it's sane. */ 110 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec, l); 111 if ((error = namei(&nd)) != 0) 112 return (error); 113 devvp = nd.ni_vp; 114 115 if (!update) { 116 /* 117 * Be sure this is a valid block device 118 */ 119 if (devvp->v_type != VBLK) 120 error = ENOTBLK; 121 else if (bdevsw_lookup(devvp->v_specinfo->si_rdev) == 122 NULL) 123 error = ENXIO; 124 } else { 125 /* 126 * Be sure we're still naming the same device 127 * used for our initial mount 128 */ 129 if (devvp != bmp->devvp) 130 error = EINVAL; 131 } 132 } 133 134 /* 135 * If mount by non-root, then verify that user has necessary 136 * permissions on the device. 137 */ 138 if (error == 0 && kauth_authorize_generic(l->l_cred, 139 KAUTH_GENERIC_ISSUSER, NULL)) { 140 int accessmode = VREAD; 141 if (update ? 142 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 143 (mp->mnt_flag & MNT_RDONLY) == 0) 144 accessmode |= VWRITE; 145 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 146 error = VOP_ACCESS(devvp, accessmode, l->l_cred, l); 147 VOP_UNLOCK(devvp, 0); 148 } 149 150 if (error) { 151 vrele(devvp); 152 return error; 153 } 154 155 if (!update) { 156 if ((error = sysvbfs_mountfs(devvp, mp, l)) != 0) { 157 vrele(devvp); 158 return error; 159 } 160 } else if (mp->mnt_flag & MNT_RDONLY) { 161 /* XXX: r/w -> read only */ 162 } 163 164 return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, 165 mp->mnt_op->vfs_name, mp, l); 166 } 167 168 int 169 sysvbfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 170 { 171 kauth_cred_t cred = l->l_cred; 172 struct sysvbfs_mount *bmp; 173 struct partinfo dpart; 174 int error; 175 176 if ((error = vfs_mountedon(devvp)) != 0) 177 return error; /* Already mounted */ 178 if (vcount(devvp) > 1) 179 return EBUSY; /* Opened by other */ 180 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 181 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 182 VOP_UNLOCK(devvp, 0); 183 if (error) 184 return error; 185 186 /* Open block device */ 187 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, l)) != 0) 188 return error; 189 190 /* Get partition information */ 191 if ((error = VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l)) != 0) 192 return error; 193 194 bmp = malloc(sizeof(struct sysvbfs_mount), M_SYSVBFS_VFS, M_WAITOK); 195 if (bmp == NULL) 196 return ENOMEM; 197 bmp->devvp = devvp; 198 bmp->mountp = mp; 199 if ((error = sysvbfs_bfs_init(&bmp->bfs, devvp)) != 0) { 200 free(bmp, M_SYSVBFS_VFS); 201 return error; 202 } 203 LIST_INIT(&bmp->bnode_head); 204 205 mp->mnt_data = bmp; 206 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 207 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_SYSVBFS); 208 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 209 mp->mnt_flag |= MNT_LOCAL; 210 mp->mnt_dev_bshift = BFS_BSHIFT; 211 mp->mnt_fs_bshift = BFS_BSHIFT; 212 213 DPRINTF("fstype=%d dtype=%d bsize=%d\n", dpart.part->p_fstype, 214 dpart.disklab->d_type, dpart.disklab->d_secsize); 215 216 return 0; 217 } 218 219 int 220 sysvbfs_start(struct mount *mp, int flags, struct lwp *l) 221 { 222 223 DPRINTF("%s:\n", __FUNCTION__); 224 /* Nothing to do. */ 225 return 0; 226 } 227 228 int 229 sysvbfs_unmount(struct mount *mp, int mntflags, struct lwp *l) 230 { 231 struct sysvbfs_mount *bmp = (void *)mp->mnt_data; 232 int error; 233 234 DPRINTF("%s: %p\n", __FUNCTION__, bmp); 235 236 if ((error = vflush(mp, NULLVP, 237 mntflags & MNT_FORCE ? FORCECLOSE : 0)) != 0) 238 return error; 239 240 vn_lock(bmp->devvp, LK_EXCLUSIVE | LK_RETRY); 241 error = VOP_CLOSE(bmp->devvp, FREAD, NOCRED, l); 242 vput(bmp->devvp); 243 244 sysvbfs_bfs_fini(bmp->bfs); 245 246 free(bmp, M_SYSVBFS_VFS); 247 mp->mnt_data = NULL; 248 mp->mnt_flag &= ~MNT_LOCAL; 249 250 return 0; 251 } 252 253 int 254 sysvbfs_root(struct mount *mp, struct vnode **vpp) 255 { 256 struct vnode *vp; 257 int error; 258 259 DPRINTF("%s:\n", __FUNCTION__); 260 if ((error = VFS_VGET(mp, BFS_ROOT_INODE, &vp)) != 0) 261 return error; 262 *vpp = vp; 263 264 return 0; 265 } 266 267 int 268 sysvbfs_quotactl(struct mount *mp, int cmd, uid_t uid, void *arg, 269 struct lwp *l) 270 { 271 272 DPRINTF("%s:\n", __FUNCTION__); 273 /* Don't support. */ 274 return 0; 275 } 276 277 int 278 sysvbfs_statvfs(struct mount *mp, struct statvfs *f, struct lwp *l) 279 { 280 struct sysvbfs_mount *bmp = mp->mnt_data; 281 struct bfs *bfs = bmp->bfs; 282 int free_block; 283 size_t data_block; 284 285 data_block = (bfs->data_end - bfs->data_start) >> BFS_BSHIFT; 286 if (bfs_inode_alloc(bfs, 0, 0, &free_block) != 0) 287 free_block = 0; 288 else 289 free_block = (bfs->data_end >> BFS_BSHIFT) - free_block; 290 291 DPRINTF("%s: %d %d %d\n", __FUNCTION__, bfs->data_start, 292 bfs->data_end, free_block); 293 294 f->f_bsize = BFS_BSIZE; 295 f->f_frsize = BFS_BSIZE; 296 f->f_iosize = BFS_BSIZE; 297 f->f_blocks = data_block; 298 f->f_bfree = free_block; 299 f->f_bavail = f->f_bfree; 300 f->f_bresvd = 0; 301 f->f_files = bfs->n_inode; 302 f->f_ffree = bfs->max_inode - f->f_files; 303 f->f_favail = f->f_ffree; 304 f->f_fresvd = 0; 305 copy_statvfs_info(f, mp); 306 307 return 0; 308 } 309 310 int 311 sysvbfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred, 312 struct lwp *l) 313 { 314 struct sysvbfs_mount *bmp = mp->mnt_data; 315 struct sysvbfs_node *bnode; 316 struct vnode *v; 317 int err, error; 318 319 DPRINTF("%s:\n", __FUNCTION__); 320 error = 0; 321 mutex_enter(&mntvnode_lock); 322 for (bnode = LIST_FIRST(&bmp->bnode_head); bnode != NULL; 323 bnode = LIST_NEXT(bnode, link)) { 324 v = bnode->vnode; 325 mutex_enter(&v->v_interlock); 326 mutex_exit(&mntvnode_lock); 327 err = vget(v, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK); 328 if (err == 0) { 329 err = VOP_FSYNC(v, cred, FSYNC_WAIT, 0, 0, l); 330 vput(v); 331 } 332 if (err != 0) 333 error = err; 334 mutex_enter(&mntvnode_lock); 335 } 336 mutex_exit(&mntvnode_lock); 337 338 return error; 339 } 340 341 int 342 sysvbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 343 { 344 struct sysvbfs_mount *bmp = mp->mnt_data; 345 struct bfs *bfs = bmp->bfs; 346 struct vnode *vp; 347 struct sysvbfs_node *bnode; 348 struct bfs_inode *inode; 349 int error; 350 351 DPRINTF("%s: i-node=%d\n", __FUNCTION__, ino); 352 /* Lookup requested i-node */ 353 if (!bfs_inode_lookup(bfs, ino, &inode)) { 354 DPRINTF("bfs_inode_lookup failed.\n"); 355 return ENOENT; 356 } 357 for (bnode = LIST_FIRST(&bmp->bnode_head); bnode != NULL; 358 bnode = LIST_NEXT(bnode, link)) { 359 if (bnode->inode->number == ino) { 360 *vpp = bnode->vnode; 361 } 362 } 363 364 /* Allocate v-node. */ 365 if ((error = getnewvnode(VT_SYSVBFS, mp, sysvbfs_vnodeop_p, &vp)) != 366 0) { 367 DPRINTF("%s: getnewvnode error.\n", __FUNCTION__); 368 return error; 369 } 370 /* Lock vnode here */ 371 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 372 373 /* Allocate i-node */ 374 vp->v_data = pool_get(&sysvbfs_node_pool, PR_WAITOK); 375 memset(vp->v_data, 0, sizeof(struct sysvbfs_node)); 376 bnode = vp->v_data; 377 mutex_enter(&mntvnode_lock); 378 LIST_INSERT_HEAD(&bmp->bnode_head, bnode, link); 379 mutex_exit(&mntvnode_lock); 380 bnode->vnode = vp; 381 bnode->bmp = bmp; 382 bnode->inode = inode; 383 bnode->lockf = NULL; /* advlock */ 384 385 if (ino == BFS_ROOT_INODE) { /* BFS is flat filesystem */ 386 vp->v_type = VDIR; 387 vp->v_vflag |= VV_ROOT; 388 } else { 389 vp->v_type = VREG; 390 } 391 vp->v_size = bfs_file_size(inode); 392 393 genfs_node_init(vp, &sysvbfs_genfsops); 394 uvm_vnp_setsize(vp, vp->v_size); 395 *vpp = vp; 396 397 return 0; 398 } 399 400 int 401 sysvbfs_fhtovp(struct mount *mp, struct fid *fid, struct vnode **vpp) 402 { 403 404 DPRINTF("%s:\n", __FUNCTION__); 405 /* notyet */ 406 return EOPNOTSUPP; 407 } 408 409 int 410 sysvbfs_vptofh(struct vnode *vpp, struct fid *fid, size_t *fh_size) 411 { 412 413 DPRINTF("%s:\n", __FUNCTION__); 414 /* notyet */ 415 return EOPNOTSUPP; 416 } 417 418 MALLOC_DECLARE(M_BFS); 419 MALLOC_DECLARE(M_SYSVBFS_VNODE); 420 421 void 422 sysvbfs_init(void) 423 { 424 425 DPRINTF("%s:\n", __FUNCTION__); 426 malloc_type_attach(M_SYSVBFS_VFS); 427 malloc_type_attach(M_BFS); 428 malloc_type_attach(M_SYSVBFS_VNODE); 429 pool_init(&sysvbfs_node_pool, sizeof(struct sysvbfs_node), 0, 0, 0, 430 "sysvbfs_node_pool", &pool_allocator_nointr, IPL_NONE); 431 } 432 433 void 434 sysvbfs_reinit(void) 435 { 436 437 /* Nothing to do. */ 438 DPRINTF("%s:\n", __FUNCTION__); 439 } 440 441 void 442 sysvbfs_done(void) 443 { 444 445 DPRINTF("%s:\n", __FUNCTION__); 446 pool_destroy(&sysvbfs_node_pool); 447 malloc_type_detach(M_BFS); 448 malloc_type_detach(M_SYSVBFS_VFS); 449 malloc_type_detach(M_SYSVBFS_VNODE); 450 } 451 452 int 453 sysvbfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 454 kauth_cred_t cred) 455 { 456 457 return 0; 458 } 459
Indexes created Mon Sep 22 21:09:42 GMT 2025