1 /* $NetBSD: sysvbfs_vfsops.c,v 1.4 2006/05/15 11:16:16 yamt 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 1.4 2006/05/15 11:16:16 yamt Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/pool.h> 46 47 #include <sys/time.h> 48 #include <sys/ucred.h> 49 #include <sys/mount.h> 50 #include <sys/disklabel.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/kauth.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_DEFINE(M_SYSVBFS_VFS, "sysvbfs vfs", "sysvbfs vfs structures"); 71 72 POOL_INIT(sysvbfs_node_pool, sizeof(struct sysvbfs_node), 0, 0, 0, 73 "sysvbfs_node_pool", &pool_allocator_nointr); 74 75 int sysvbfs_mountfs(struct vnode *, struct mount *, struct lwp *); 76 77 int 78 sysvbfs_mount(struct mount *mp, const char *path, void *data, 79 struct nameidata *ndp, struct lwp *l) 80 { 81 struct sysvbfs_args args; 82 struct sysvbfs_mount *bmp = NULL; 83 struct vnode *devvp = NULL; 84 struct proc *p = l->l_proc; 85 int error; 86 boolean_t update; 87 88 DPRINTF("%s: mnt_flag=%x\n", __FUNCTION__, mp->mnt_flag); 89 90 if (mp->mnt_flag & MNT_GETARGS) { 91 if ((bmp = (void *)mp->mnt_data) == NULL) 92 return EIO; 93 args.fspec = NULL; 94 return copyout(&args, data, sizeof(args)); 95 } 96 97 if ((error = copyin(data, &args, sizeof(args))) != 0) 98 return error; 99 100 DPRINTF("%s: args.fspec=%s\n", __FUNCTION__, args.fspec); 101 update = mp->mnt_flag & MNT_UPDATE; 102 if (args.fspec == NULL) { 103 /* nothing to do. */ 104 return EINVAL; 105 } 106 107 if (args.fspec != NULL) { 108 /* Look up the name and verify that it's sane. */ 109 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, l); 110 if ((error = namei(ndp)) != 0) 111 return (error); 112 devvp = ndp->ni_vp; 113 114 if (!update) { 115 /* 116 * Be sure this is a valid block device 117 */ 118 if (devvp->v_type != VBLK) 119 error = ENOTBLK; 120 else if (bdevsw_lookup(devvp->v_specinfo->si_rdev) == 121 NULL) 122 error = ENXIO; 123 } else { 124 /* 125 * Be sure we're still naming the same device 126 * used for our initial mount 127 */ 128 if (devvp != bmp->devvp) 129 error = EINVAL; 130 } 131 } 132 133 /* 134 * If mount by non-root, then verify that user has necessary 135 * permissions on the device. 136 */ 137 if (error == 0 && kauth_cred_geteuid(p->p_cred) != 0) { 138 int accessmode = VREAD; 139 if (update ? 140 (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : 141 (mp->mnt_flag & MNT_RDONLY) == 0) 142 accessmode |= VWRITE; 143 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 144 error = VOP_ACCESS(devvp, accessmode, p->p_cred, l); 145 VOP_UNLOCK(devvp, 0); 146 } 147 148 if (error) { 149 vrele(devvp); 150 return error; 151 } 152 153 if (!update) { 154 if ((error = sysvbfs_mountfs(devvp, mp, l)) != 0) { 155 vrele(devvp); 156 return error; 157 } 158 } else if (mp->mnt_flag & MNT_RDONLY) { 159 /* XXX: r/w -> read only */ 160 } 161 162 return set_statvfs_info(path, UIO_USERSPACE, args.fspec, UIO_USERSPACE, 163 mp, l); 164 } 165 166 int 167 sysvbfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) 168 { 169 kauth_cred_t cred = l->l_proc->p_cred; 170 struct sysvbfs_mount *bmp; 171 struct partinfo dpart; 172 int error; 173 174 if ((error = vfs_mountedon(devvp)) != 0) 175 return error; /* Already mounted */ 176 if (vcount(devvp) > 1) 177 return EBUSY; /* Opened by other */ 178 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 179 error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); 180 VOP_UNLOCK(devvp, 0); 181 if (error) 182 return error; 183 184 /* Open block device */ 185 if ((error = VOP_OPEN(devvp, FREAD, NOCRED, l)) != 0) 186 return error; 187 188 /* Get partition information */ 189 if ((error = VOP_IOCTL(devvp, DIOCGPART, &dpart, FREAD, cred, l)) != 0) 190 return error; 191 192 bmp = malloc(sizeof(struct sysvbfs_mount), M_SYSVBFS_VFS, M_WAITOK); 193 if (bmp == NULL) 194 return ENOMEM; 195 bmp->devvp = devvp; 196 bmp->mountp = mp; 197 if ((error = sysvbfs_bfs_init(&bmp->bfs, devvp)) != 0) { 198 free(bmp, M_SYSVBFS_VFS); 199 return error; 200 } 201 LIST_INIT(&bmp->bnode_head); 202 203 mp->mnt_data = bmp; 204 mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)devvp->v_rdev; 205 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_SYSVBFS); 206 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 207 mp->mnt_flag |= MNT_LOCAL; 208 mp->mnt_dev_bshift = BFS_BSIZE; 209 mp->mnt_fs_bshift = BFS_BSHIFT; 210 211 DPRINTF("fstype=%d dtype=%d bsize=%d\n", dpart.part->p_fstype, 212 dpart.disklab->d_type, dpart.disklab->d_secsize); 213 214 return 0; 215 } 216 217 int 218 sysvbfs_start(struct mount *mp, int flags, struct lwp *l) 219 { 220 221 DPRINTF("%s:\n", __FUNCTION__); 222 /* Nothing to do. */ 223 return 0; 224 } 225 226 int 227 sysvbfs_unmount(struct mount *mp, int mntflags, struct lwp *l) 228 { 229 struct sysvbfs_mount *bmp = (void *)mp->mnt_data; 230 int error; 231 232 DPRINTF("%s: %p\n", __FUNCTION__, bmp); 233 234 if ((error = vflush(mp, NULLVP, 235 mntflags & MNT_FORCE ? FORCECLOSE : 0)) != 0) 236 return error; 237 238 vn_lock(bmp->devvp, LK_EXCLUSIVE | LK_RETRY); 239 error = VOP_CLOSE(bmp->devvp, FREAD, NOCRED, l); 240 vput(bmp->devvp); 241 242 sysvbfs_bfs_fini(bmp->bfs); 243 244 free(bmp, M_SYSVBFS_VFS); 245 mp->mnt_data = NULL; 246 mp->mnt_flag &= ~MNT_LOCAL; 247 248 return 0; 249 } 250 251 int 252 sysvbfs_root(struct mount *mp, struct vnode **vpp) 253 { 254 struct vnode *vp; 255 int error; 256 257 DPRINTF("%s:\n", __FUNCTION__); 258 if ((error = VFS_VGET(mp, BFS_ROOT_INODE, &vp)) != 0) 259 return error; 260 *vpp = vp; 261 262 return 0; 263 } 264 265 int 266 sysvbfs_quotactl(struct mount *mp, int cmd, uid_t uid, void *arg, 267 struct lwp *l) 268 { 269 270 DPRINTF("%s:\n", __FUNCTION__); 271 /* Don't support. */ 272 return 0; 273 } 274 275 int 276 sysvbfs_statvfs(struct mount *mp, struct statvfs *f, struct lwp *l) 277 { 278 struct sysvbfs_mount *bmp = mp->mnt_data; 279 struct bfs *bfs = bmp->bfs; 280 int free_block; 281 size_t data_block; 282 283 data_block = (bfs->data_end - bfs->data_start) >> BFS_BSHIFT; 284 if (bfs_inode_alloc(bfs, 0, 0, &free_block) != 0) 285 free_block = 0; 286 else 287 free_block = (bfs->data_end >> BFS_BSHIFT) - free_block; 288 289 DPRINTF("%s: %d %d %d\n", __FUNCTION__, bfs->data_start, 290 bfs->data_end, free_block); 291 292 f->f_bsize = BFS_BSIZE; 293 f->f_frsize = BFS_BSIZE; 294 f->f_iosize = BFS_BSIZE; 295 f->f_blocks = data_block; 296 f->f_bfree = free_block; 297 f->f_bavail = f->f_bfree; 298 f->f_bresvd = 0; 299 f->f_files = bfs->n_inode; 300 f->f_ffree = bfs->max_inode - f->f_files; 301 f->f_favail = f->f_ffree; 302 f->f_fresvd = 0; 303 copy_statvfs_info(f, mp); 304 305 return 0; 306 } 307 308 int 309 sysvbfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred, 310 struct lwp *l) 311 { 312 struct sysvbfs_mount *bmp = mp->mnt_data; 313 struct sysvbfs_node *bnode; 314 struct vnode *v; 315 int err, error; 316 317 DPRINTF("%s:\n", __FUNCTION__); 318 error = 0; 319 simple_lock(&mntvnode_slock); 320 for (bnode = LIST_FIRST(&bmp->bnode_head); bnode != NULL; 321 bnode = LIST_NEXT(bnode, link)) { 322 simple_unlock(&mntvnode_slock); 323 v = bnode->vnode; 324 err = vget(v, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK); 325 if (err == 0) { 326 err = VOP_FSYNC(v, cred, FSYNC_WAIT, 0, 0, l); 327 vput(v); 328 } 329 if (err != 0) 330 error = err; 331 simple_lock(&mntvnode_slock); 332 } 333 simple_unlock(&mntvnode_slock); 334 335 return error; 336 } 337 338 int 339 sysvbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 340 { 341 struct sysvbfs_mount *bmp = mp->mnt_data; 342 struct bfs *bfs = bmp->bfs; 343 struct vnode *vp; 344 struct sysvbfs_node *bnode; 345 struct bfs_inode *inode; 346 int error; 347 348 DPRINTF("%s: i-node=%d\n", __FUNCTION__, ino); 349 /* Lookup requested i-node */ 350 if (!bfs_inode_lookup(bfs, ino, &inode)) { 351 DPRINTF("bfs_inode_lookup failed.\n"); 352 return ENOENT; 353 } 354 for (bnode = LIST_FIRST(&bmp->bnode_head); bnode != NULL; 355 bnode = LIST_NEXT(bnode, link)) { 356 if (bnode->inode->number == ino) { 357 *vpp = bnode->vnode; 358 } 359 } 360 361 /* Allocate v-node. */ 362 if ((error = getnewvnode(VT_SYSVBFS, mp, sysvbfs_vnodeop_p, &vp)) != 363 0) { 364 DPRINTF("%s: getnewvnode error.\n", __FUNCTION__); 365 return error; 366 } 367 /* Lock vnode here */ 368 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 369 370 /* Allocate i-node */ 371 vp->v_data = pool_get(&sysvbfs_node_pool, PR_WAITOK); 372 memset(vp->v_data, 0, sizeof(struct sysvbfs_node)); 373 bnode = vp->v_data; 374 simple_lock(&mntvnode_slock); 375 LIST_INSERT_HEAD(&bmp->bnode_head, bnode, link); 376 simple_unlock(&mntvnode_slock); 377 bnode->vnode = vp; 378 bnode->bmp = bmp; 379 bnode->inode = inode; 380 bnode->lockf = NULL; /* advlock */ 381 382 if (ino == BFS_ROOT_INODE) { /* BFS is flat filesystem */ 383 vp->v_type = VDIR; 384 vp->v_flag |= VROOT; 385 } else { 386 vp->v_type = VREG; 387 } 388 vp->v_size = bfs_file_size(inode); 389 390 genfs_node_init(vp, &sysvbfs_genfsops); 391 uvm_vnp_setsize(vp, vp->v_size); 392 *vpp = vp; 393 394 return 0; 395 } 396 397 int 398 sysvbfs_fhtovp(struct mount *mp, struct fid *fid, struct vnode **vpp) 399 { 400 401 DPRINTF("%s:\n", __FUNCTION__); 402 /* notyet */ 403 return EOPNOTSUPP; 404 } 405 406 int 407 sysvbfs_vptofh(struct vnode *vpp, struct fid *fid) 408 { 409 410 DPRINTF("%s:\n", __FUNCTION__); 411 /* notyet */ 412 return EOPNOTSUPP; 413 } 414 415 void 416 sysvbfs_init(void) 417 { 418 419 /* Nothing to do. */ 420 DPRINTF("%s:\n", __FUNCTION__); 421 } 422 423 void 424 sysvbfs_reinit(void) 425 { 426 427 /* Nothing to do. */ 428 DPRINTF("%s:\n", __FUNCTION__); 429 } 430 431 void 432 sysvbfs_done(void) 433 { 434 435 DPRINTF("%s:\n", __FUNCTION__); 436 pool_destroy(&sysvbfs_node_pool); 437 } 438 439 int 440 sysvbfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 441 kauth_cred_t cred) 442 { 443 444 return 0; 445 } 446