diff options
author | ru <ru@FreeBSD.org> | 2001-05-23 09:42:29 +0000 |
---|---|---|
committer | ru <ru@FreeBSD.org> | 2001-05-23 09:42:29 +0000 |
commit | 35437d86aa2e89b16dfeb84a5499976559847155 (patch) | |
tree | 2bade94e6086e67f8de015d8c16fd2c15e7f78c3 /sys/miscfs/nullfs/null_vfsops.c | |
parent | 627a25efaa565e765c3f4d9223bfeef7134724ef (diff) | |
download | FreeBSD-src-35437d86aa2e89b16dfeb84a5499976559847155.zip FreeBSD-src-35437d86aa2e89b16dfeb84a5499976559847155.tar.gz |
- FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
systems were repo-copied from sys/miscfs to sys/fs.
- Renamed the following file systems and their modules:
fdesc -> fdescfs, portal -> portalfs, union -> unionfs.
- Renamed corresponding kernel options:
FDESC -> FDESCFS, PORTAL -> PORTALFS, UNION -> UNIONFS.
- Install header files for the above file systems.
- Removed bogus -I${.CURDIR}/../../sys CFLAGS from userland
Makefiles.
Diffstat (limited to 'sys/miscfs/nullfs/null_vfsops.c')
-rw-r--r-- | sys/miscfs/nullfs/null_vfsops.c | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/sys/miscfs/nullfs/null_vfsops.c b/sys/miscfs/nullfs/null_vfsops.c deleted file mode 100644 index 8573398..0000000 --- a/sys/miscfs/nullfs/null_vfsops.c +++ /dev/null @@ -1,425 +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 - * Jan-Simon Pendry. - * - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 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. - * - * @(#)null_vfsops.c 8.2 (Berkeley) 1/21/94 - * - * @(#)lofs_vfsops.c 1.2 (Berkeley) 6/18/92 - * $FreeBSD$ - */ - -/* - * Null Layer - * (See null_vnops.c for a description of what this does.) - */ - -#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/namei.h> -#include <sys/proc.h> -#include <sys/vnode.h> - -#include <miscfs/nullfs/null.h> - -static MALLOC_DEFINE(M_NULLFSMNT, "NULLFS mount", "NULLFS mount structure"); - -static int nullfs_fhtovp(struct mount *mp, struct fid *fidp, - struct vnode **vpp); -static int nullfs_checkexp(struct mount *mp, struct sockaddr *nam, - int *extflagsp, struct ucred **credanonp); -static int nullfs_mount(struct mount *mp, char *path, caddr_t data, - struct nameidata *ndp, struct proc *p); -static int nullfs_quotactl(struct mount *mp, int cmd, uid_t uid, - caddr_t arg, struct proc *p); -static int nullfs_root(struct mount *mp, struct vnode **vpp); -static int nullfs_start(struct mount *mp, int flags, struct proc *p); -static int nullfs_statfs(struct mount *mp, struct statfs *sbp, - struct proc *p); -static int nullfs_sync(struct mount *mp, int waitfor, - struct ucred *cred, struct proc *p); -static int nullfs_unmount(struct mount *mp, int mntflags, struct proc *p); -static int nullfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); -static int nullfs_vptofh(struct vnode *vp, struct fid *fhp); -static int nullfs_extattrctl(struct mount *mp, int cmd, - struct vnode *filename_vp, - int namespace, const char *attrname, - struct proc *p); - -/* - * Mount null layer - */ -static int -nullfs_mount(mp, path, data, ndp, p) - struct mount *mp; - char *path; - caddr_t data; - struct nameidata *ndp; - struct proc *p; -{ - int error = 0; - struct null_args args; - struct vnode *lowerrootvp, *vp; - struct vnode *nullm_rootvp; - struct null_mount *xmp; - u_int size; - int isvnunlocked = 0; - - NULLFSDEBUG("nullfs_mount(mp = %p)\n", (void *)mp); - - /* - * Update is a no-op - */ - if (mp->mnt_flag & MNT_UPDATE) { - return (EOPNOTSUPP); - /* return VFS_MOUNT(MOUNTTONULLMOUNT(mp)->nullm_vfs, path, data, ndp, p);*/ - } - - /* - * Get argument - */ - error = copyin(data, (caddr_t)&args, sizeof(struct null_args)); - if (error) - return (error); - - /* - * Unlock lower node to avoid deadlock. - * (XXX) VOP_ISLOCKED is needed? - */ - if ((mp->mnt_vnodecovered->v_op == null_vnodeop_p) && - VOP_ISLOCKED(mp->mnt_vnodecovered, NULL)) { - VOP_UNLOCK(mp->mnt_vnodecovered, 0, p); - isvnunlocked = 1; - } - /* - * Find lower node - */ - NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF, - UIO_USERSPACE, args.target, p); - error = namei(ndp); - /* - * Re-lock vnode. - */ - if (isvnunlocked && !VOP_ISLOCKED(mp->mnt_vnodecovered, NULL)) - vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY, p); - - if (error) - return (error); - NDFREE(ndp, NDF_ONLY_PNBUF); - - /* - * Sanity check on lower vnode - */ - lowerrootvp = ndp->ni_vp; - - vrele(ndp->ni_dvp); - ndp->ni_dvp = NULLVP; - - /* - * Check multi null mount to avoid `lock against myself' panic. - */ - if (lowerrootvp == VTONULL(mp->mnt_vnodecovered)->null_lowervp) { - NULLFSDEBUG("nullfs_mount: multi null mount?\n"); - vput(lowerrootvp); - return (EDEADLK); - } - - xmp = (struct null_mount *) malloc(sizeof(struct null_mount), - M_NULLFSMNT, M_WAITOK); /* XXX */ - - /* - * Save reference to underlying FS - */ - xmp->nullm_vfs = lowerrootvp->v_mount; - - /* - * Save reference. Each mount also holds - * a reference on the root vnode. - */ - error = null_node_create(mp, lowerrootvp, &vp); - /* - * Unlock the node (either the lower or the alias) - */ - VOP_UNLOCK(vp, 0, p); - /* - * Make sure the node alias worked - */ - if (error) { - vrele(lowerrootvp); - free(xmp, M_NULLFSMNT); /* XXX */ - return (error); - } - - /* - * Keep a held reference to the root vnode. - * It is vrele'd in nullfs_unmount. - */ - nullm_rootvp = vp; - nullm_rootvp->v_flag |= VROOT; - xmp->nullm_rootvp = nullm_rootvp; - if (NULLVPTOLOWERVP(nullm_rootvp)->v_mount->mnt_flag & MNT_LOCAL) - mp->mnt_flag |= MNT_LOCAL; - mp->mnt_data = (qaddr_t) xmp; - 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)nullfs_statfs(mp, &mp->mnt_stat, p); - NULLFSDEBUG("nullfs_mount: lower %s, alias at %s\n", - mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname); - return (0); -} - -/* - * VFS start. Nothing needed here - the start routine - * on the underlying filesystem will have been called - * when that filesystem was mounted. - */ -static int -nullfs_start(mp, flags, p) - struct mount *mp; - int flags; - struct proc *p; -{ - return (0); - /* return VFS_START(MOUNTTONULLMOUNT(mp)->nullm_vfs, flags, p); */ -} - -/* - * Free reference to null layer - */ -static int -nullfs_unmount(mp, mntflags, p) - struct mount *mp; - int mntflags; - struct proc *p; -{ - void *mntdata; - int error; - int flags = 0; - - NULLFSDEBUG("nullfs_unmount: mp = %p\n", (void *)mp); - - if (mntflags & MNT_FORCE) - flags |= FORCECLOSE; - - /* There is 1 extra root vnode reference (nullm_rootvp). */ - error = vflush(mp, 1, flags); - if (error) - return (error); - - /* - * Finally, throw away the null_mount structure - */ - mntdata = mp->mnt_data; - mp->mnt_data = 0; - free(mntdata, M_NULLFSMNT); - return 0; -} - -static int -nullfs_root(mp, vpp) - struct mount *mp; - struct vnode **vpp; -{ - struct proc *p = curproc; /* XXX */ - struct vnode *vp; - - NULLFSDEBUG("nullfs_root(mp = %p, vp = %p->%p)\n", (void *)mp, - (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp, - (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp)); - - /* - * Return locked reference to root. - */ - vp = MOUNTTONULLMOUNT(mp)->nullm_rootvp; - VREF(vp); - -#ifdef NULLFS_DEBUG - if (VOP_ISLOCKED(vp, NULL)) { - Debugger("root vnode is locked.\n"); - vrele(vp); - return (EDEADLK); - } -#endif - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); - *vpp = vp; - return 0; -} - -static int -nullfs_quotactl(mp, cmd, uid, arg, p) - struct mount *mp; - int cmd; - uid_t uid; - caddr_t arg; - struct proc *p; -{ - return VFS_QUOTACTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd, uid, arg, p); -} - -static int -nullfs_statfs(mp, sbp, p) - struct mount *mp; - struct statfs *sbp; - struct proc *p; -{ - int error; - struct statfs mstat; - - NULLFSDEBUG("nullfs_statfs(mp = %p, vp = %p->%p)\n", (void *)mp, - (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp, - (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp)); - - bzero(&mstat, sizeof(mstat)); - - error = VFS_STATFS(MOUNTTONULLMOUNT(mp)->nullm_vfs, &mstat, p); - 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; - if (sbp != &mp->mnt_stat) { - bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); - bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); - bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); - } - return (0); -} - -static int -nullfs_sync(mp, waitfor, cred, p) - struct mount *mp; - int waitfor; - struct ucred *cred; - struct proc *p; -{ - /* - * XXX - Assumes no data cached at null layer. - */ - return (0); -} - -static int -nullfs_vget(mp, ino, vpp) - struct mount *mp; - ino_t ino; - struct vnode **vpp; -{ - int error; - error = VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, vpp); - if (error) - return (error); - - return (null_node_create(mp, *vpp, vpp)); -} - -static int -nullfs_fhtovp(mp, fidp, vpp) - struct mount *mp; - struct fid *fidp; - struct vnode **vpp; -{ - int error; - error = VFS_FHTOVP(MOUNTTONULLMOUNT(mp)->nullm_vfs, fidp, vpp); - if (error) - return (error); - - return (null_node_create(mp, *vpp, vpp)); -} - -static int -nullfs_checkexp(mp, nam, extflagsp, credanonp) - struct mount *mp; - struct sockaddr *nam; - int *extflagsp; - struct ucred **credanonp; -{ - - return VFS_CHECKEXP(MOUNTTONULLMOUNT(mp)->nullm_vfs, nam, - extflagsp, credanonp); -} - -static int -nullfs_vptofh(vp, fhp) - struct vnode *vp; - struct fid *fhp; -{ - return VFS_VPTOFH(NULLVPTOLOWERVP(vp), fhp); -} - -static int -nullfs_extattrctl(mp, cmd, filename_vp, namespace, attrname, p) - struct mount *mp; - int cmd; - struct vnode *filename_vp; - int namespace; - const char *attrname; - struct proc *p; -{ - return VFS_EXTATTRCTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd, filename_vp, - namespace, attrname, p); -} - - -static struct vfsops null_vfsops = { - nullfs_mount, - nullfs_start, - nullfs_unmount, - nullfs_root, - nullfs_quotactl, - nullfs_statfs, - nullfs_sync, - nullfs_vget, - nullfs_fhtovp, - nullfs_checkexp, - nullfs_vptofh, - nullfs_init, - nullfs_uninit, - nullfs_extattrctl, -}; - -VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK); |