diff options
Diffstat (limited to 'sys/fs/umapfs/umap_vfsops.c')
| -rw-r--r-- | sys/fs/umapfs/umap_vfsops.c | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/sys/fs/umapfs/umap_vfsops.c b/sys/fs/umapfs/umap_vfsops.c deleted file mode 100644 index d40dd56..0000000 --- a/sys/fs/umapfs/umap_vfsops.c +++ /dev/null @@ -1,412 +0,0 @@ -/*- - * Copyright (c) 1992, 1993, 1995 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software donated to Berkeley by - * the UCLA Ficus project. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)umap_vfsops.c 8.8 (Berkeley) 5/14/95 - * - * $FreeBSD$ - */ - -/* - * Umap Layer - * (See mount_umapfs(8) for a description of this layer.) - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/mount.h> -#include <sys/mutex.h> -#include <sys/namei.h> -#include <sys/vnode.h> - -#include <fs/umapfs/umap.h> - -static MALLOC_DEFINE(M_UMAPFSMNT, "umap_mount", "UMAP mount structure"); - -static vfs_omount_t umapfs_omount; -static vfs_root_t umapfs_root; -static vfs_quotactl_t umapfs_quotactl; -static vfs_statfs_t umapfs_statfs; -static vfs_unmount_t umapfs_unmount; -static vfs_fhtovp_t umapfs_fhtovp; -static vfs_checkexp_t umapfs_checkexp; -static vfs_vget_t umapfs_vget; -static vfs_extattrctl_t umapfs_extattrctl; - -/* - * Mount umap layer - */ -static int -umapfs_omount(mp, path, data, ndp, td) - struct mount *mp; - char *path; - caddr_t data; - struct nameidata *ndp; - struct thread *td; -{ - struct umap_args args; - struct vnode *lowerrootvp, *vp; - struct vnode *umapm_rootvp; - struct umap_mount *amp; - size_t size; - int error; -#ifdef DEBUG - int i; -#endif - - /* - * Only for root - */ - error = priv_check(td, PRIV_VFS_MOUNT); - if (error) - return (error); - -#ifdef DEBUG - printf("umapfs_mount(mp = %p)\n", (void *)mp); -#endif - - /* - * Update is a no-op - */ - if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) { - return (EOPNOTSUPP); - /* return (VFS_MOUNT(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, path, data, ndp, td));*/ - } - - /* - * Get argument - */ - error = copyin(data, (caddr_t)&args, sizeof(struct umap_args)); - if (error) - return (error); - - /* - * Find lower node - */ - NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF, - UIO_USERSPACE, args.target, td); - error = namei(ndp); - if (error) - return (error); - NDFREE(ndp, NDF_ONLY_PNBUF); - - /* - * Sanity check on lower vnode - */ - lowerrootvp = ndp->ni_vp; -#ifdef DEBUG - printf("vp = %p, check for VDIR...\n", (void *)lowerrootvp); -#endif - vrele(ndp->ni_dvp); - ndp->ni_dvp = 0; - - if (lowerrootvp->v_type != VDIR) { - vput(lowerrootvp); - return (EINVAL); - } - -#ifdef DEBUG - printf("mp = %p\n", (void *)mp); -#endif - - amp = (struct umap_mount *) malloc(sizeof(struct umap_mount), - M_UMAPFSMNT, M_WAITOK); /* XXX */ - - /* - * Save reference to underlying FS - */ - amp->umapm_vfs = lowerrootvp->v_mount; - - /* - * Now copy in the number of entries and maps for umap mapping. - */ - if (args.nentries > MAPFILEENTRIES || args.gnentries > - GMAPFILEENTRIES) { - vput(lowerrootvp); - free(amp, M_UMAPFSMNT); - /* XXX missing error = EINVAL ? */ - return (error); - } - - amp->info_nentries = args.nentries; - amp->info_gnentries = args.gnentries; - error = copyin(args.mapdata, (caddr_t)amp->info_mapdata, - 2*sizeof(u_long)*args.nentries); - if (error) { - free(amp, M_UMAPFSMNT); - return (error); - } - -#ifdef DEBUG - printf("umap_mount:nentries %d\n",args.nentries); - for (i = 0; i < args.nentries; i++) - printf(" %lu maps to %lu\n", amp->info_mapdata[i][0], - amp->info_mapdata[i][1]); -#endif - - error = copyin(args.gmapdata, (caddr_t)amp->info_gmapdata, - 2*sizeof(u_long)*args.gnentries); - if (error) { - free(amp, M_UMAPFSMNT); - return (error); - } - -#ifdef DEBUG - printf("umap_mount:gnentries %d\n",args.gnentries); - for (i = 0; i < args.gnentries; i++) - printf(" group %lu maps to %lu\n", - amp->info_gmapdata[i][0], - amp->info_gmapdata[i][1]); -#endif - - - /* - * Save reference. Each mount also holds - * a reference on the root vnode. - */ - error = umap_node_create(mp, lowerrootvp, &vp); - /* - * Unlock the node (either the lower or the alias) - */ - VOP_UNLOCK(vp, 0, td); - /* - * Make sure the node alias worked - */ - if (error) { - vrele(lowerrootvp); - free(amp, M_UMAPFSMNT); /* XXX */ - return (error); - } - - /* - * Keep a held reference to the root vnode. - * It is vrele'd in umapfs_unmount. - */ - ASSERT_VOP_LOCKED(vp, "umapfs_mount"); - umapm_rootvp = vp; - umapm_rootvp->v_vflag |= VV_ROOT; - amp->umapm_rootvp = umapm_rootvp; - if (UMAPVPTOLOWERVP(umapm_rootvp)->v_mount->mnt_flag & MNT_LOCAL) { - MNT_ILOCK(mp); - mp->mnt_flag |= MNT_LOCAL; - MNT_IUNLOCK(mp); - } - mp->mnt_data = (qaddr_t) amp; - vfs_getnewfsid(mp); - - (void) copyinstr(args.target, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, - &size); - bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); - (void)umapfs_statfs(mp, &mp->mnt_stat, td); -#ifdef DEBUG - printf("umapfs_mount: lower %s, alias at %s\n", - mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname); -#endif - return (0); -} - -/* - * Free reference to umap layer - */ -static int -umapfs_unmount(mp, mntflags, td) - struct mount *mp; - int mntflags; - struct thread *td; -{ - int error; - int flags = 0; - -#ifdef DEBUG - printf("umapfs_unmount(mp = %p)\n", (void *)mp); -#endif - - if (mntflags & MNT_FORCE) - flags |= FORCECLOSE; - - /* - * Clear out buffer cache. I don't think we - * ever get anything cached at this level at the - * moment, but who knows... - */ -#ifdef notyet - mntflushbuf(mp, 0); - if (mntinvalbuf(mp, 1)) - return (EBUSY); -#endif - /* There is 1 extra root vnode reference (umapm_rootvp). */ - error = vflush(mp, 1, flags, td); - if (error) - return (error); - - /* - * Finally, throw away the umap_mount structure - */ - free(mp->mnt_data, M_UMAPFSMNT); /* XXX */ - mp->mnt_data = 0; - return (0); -} - -static int -umapfs_root(mp, flags, vpp, td) - struct mount *mp; - int flags; - struct vnode **vpp; - struct thread *td; -{ - struct thread *td = curthread; /* XXX */ - struct vnode *vp; - -#ifdef DEBUG - printf("umapfs_root(mp = %p, vp = %p->%p)\n", - (void *)mp, (void *)MOUNTTOUMAPMOUNT(mp)->umapm_rootvp, - (void *)UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)); -#endif - - /* - * Return locked reference to root. - */ - vp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp; - VREF(vp); - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); - *vpp = vp; - return (0); -} - -static int -umapfs_quotactl(mp, cmd, uid, arg, td) - struct mount *mp; - int cmd; - uid_t uid; - caddr_t arg; - struct thread *td; -{ - - return (VFS_QUOTACTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, uid, arg, td)); -} - -static int -umapfs_statfs(mp, sbp, td) - struct mount *mp; - struct statfs *sbp; - struct thread *td; -{ - int error; - struct statfs mstat; - -#ifdef DEBUG - printf("umapfs_statfs(mp = %p, vp = %p->%p)\n", - (void *)mp, (void *)MOUNTTOUMAPMOUNT(mp)->umapm_rootvp, - (void *)UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)); -#endif - - bzero(&mstat, sizeof(mstat)); - - error = VFS_STATFS(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, &mstat, td); - if (error) - return (error); - - /* now copy across the "interesting" information and fake the rest */ - sbp->f_type = mstat.f_type; - sbp->f_flags = mstat.f_flags; - sbp->f_bsize = mstat.f_bsize; - sbp->f_iosize = mstat.f_iosize; - sbp->f_blocks = mstat.f_blocks; - sbp->f_bfree = mstat.f_bfree; - sbp->f_bavail = mstat.f_bavail; - sbp->f_files = mstat.f_files; - sbp->f_ffree = mstat.f_ffree; - return (0); -} - -static int -umapfs_vget(mp, ino, flags, vpp) - struct mount *mp; - ino_t ino; - int flags; - struct vnode **vpp; -{ - - return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, flags, vpp)); -} - -static int -umapfs_fhtovp(mp, fidp, vpp) - struct mount *mp; - struct fid *fidp; - struct vnode **vpp; -{ - - return (VFS_FHTOVP(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, fidp, vpp)); -} - -static int -umapfs_checkexp(mp, nam, exflagsp, credanonp) - struct mount *mp; - struct sockaddr *nam; - int *exflagsp; - struct ucred **credanonp; -{ - - return (VFS_CHECKEXP(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, nam, - exflagsp, credanonp)); -} - -static int -umapfs_extattrctl(mp, cmd, filename_vp, namespace, attrname, td) - struct mount *mp; - int cmd; - struct vnode *filename_vp; - int namespace; - const char *attrname; - struct thread *td; -{ - - return (VFS_EXTATTRCTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, - filename_vp, namespace, attrname, td)); -} - -static struct vfsops umap_vfsops = { - .vfs_checkexp = umapfs_checkexp, - .vfs_extattrctl = umapfs_extattrctl, - .vfs_fhtovp = umapfs_fhtovp, - .vfs_init = umapfs_init, - .vfs_omount = umapfs_omount, - .vfs_quotactl = umapfs_quotactl, - .vfs_root = umapfs_root, - .vfs_statfs = umapfs_statfs, - .vfs_unmount = umapfs_unmount, - .vfs_vget = umapfs_vget, -}; - -VFS_SET(umap_vfsops, umapfs, VFCF_LOOPBACK); |
