+++ /dev/null
-/*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/* Copyright (c) 1998 Apple Computer, Inc. All Rights Reserved */
-/*
- * Change History:
- *
- * 17-Aug-1999 Pat Dirks New today.
- *
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/namei.h>
-#include <sys/filedesc.h>
-#include <sys/proc_internal.h>
-#include <sys/kernel.h>
-#include <mach/machine/vm_types.h>
-#include <sys/vnode_internal.h>
-#include <sys/socket.h>
-#include <sys/mount_internal.h>
-#include <sys/mbuf.h>
-#include <sys/file.h>
-#include <sys/disk.h>
-#include <sys/ioctl.h>
-#include <sys/errno.h>
-#include <sys/malloc.h>
-#include <sys/attr.h>
-#include <sys/uio_internal.h>
-
-#include <miscfs/specfs/specdev.h>
-
-#include "synthfs.h"
-
-#define LOADABLE_FS 0
-
-typedef int (*PFI)();
-
-struct vfsops synthfs_vfsops = {
- synthfs_mount,
- synthfs_start,
- synthfs_unmount,
- synthfs_root,
- NULL, /* quotactl */
- synthfs_vfs_getattr,
- synthfs_sync,
- synthfs_vget,
- synthfs_fhtovp,
- synthfs_vptofh,
- synthfs_init,
- synthfs_sysctl
-};
-
-#define ROOTMPMODE 0755
-#define ROOTPLACEHOLDERMODE 0700
-static char synthfs_fs_name[MFSTYPENAMELEN] = "synthfs";
-static char synthfs_fake_mntfromname[] = "<synthfs>";
-
-
-extern struct vnodeopv_desc synthfs_vnodeop_opv_desc;
-
-/* The following refer to kernel global variables used in the loading/initialization: */
-extern int maxvfsslots; /* Total number of slots in the system's vfsconf table */
-extern int maxvfsconf; /* The highest fs type number [old-style ID] in use [dispite its name] */
-extern int vfs_opv_numops; /* The total number of defined vnode operations */
-
-int vn_mkdir(struct proc *p, char *path, int mode);
-int vn_symlink(struct proc *p, char *path, char *link);
-
-
-
-
-#if LOADABLE_FS
-void
-synthfs_load(int loadArgument) {
- /* Should use vfs_fsadd kpi */
-}
-
-
-
-int synthfs_unload(void) {
-
- /* should use fs_fsremove kpi */
- return 0;
-}
-#endif
-
-
-
-/*
- * VFS Operations.
- *
- * mount system call
- */
-int
-synthfs_mount_fs(struct mount *mp, vnode_t devvp, __unused user_addr_t data, struct proc *p)
-{
- struct synthfs_mntdata *priv_mnt_data;
- int error;
- size_t size;
-
- DBG_VOP(("synthfs_mount_fs called.\n"));
- MALLOC(priv_mnt_data, struct synthfs_mntdata *, sizeof(struct synthfs_mntdata), M_SYNTHFS, M_WAITOK);
- DBG_VOP(("MALLOC succeeded...\n"));
-
- strlcpy(mp->mnt_vfsstat.f_fstypename, synthfs_fs_name, sizeof(mp->mnt_vfsstat.f_fstypename));
- strlcpy(mp->mnt_vfsstat.f_mntfromname, synthfs_fake_mntfromname, sizeof(mp->mnt_vfsstat.f_mntfromname));
- priv_mnt_data->synthfs_mounteddev = (dev_t)0;
- priv_mnt_data->synthfs_nextid = FIRST_SYNTHFS_ID;
- priv_mnt_data->synthfs_filecount = 0;
- priv_mnt_data->synthfs_dircount = 0;
- priv_mnt_data->synthfs_encodingsused = 0x00000001;
-
- /*
- Set up the root vnode for fast reference in the future.
- Note that synthfs_new_directory() returns the vnode with a refcount of +2.
- The root vnode's refcount is maintained unlocked but with a pos. ref count until unmount.
- */
- error = synthfs_new_directory(mp, NULL, "", ROOT_DIRID, (S_IRWXU|S_IRWXG|S_IROTH|S_IXOTH), p, &priv_mnt_data->synthfs_rootvp);
- if (error) {
- DBG_VOP(("Attempt to create root directory failed with error %d.\n", error));
- return error;
- };
- priv_mnt_data->synthfs_rootvp->v_flag |= VROOT;
-
- priv_mnt_data->synthfs_mp = mp;
- mp->mnt_data = (void *)priv_mnt_data;
-
- /* Drop the freshly acquired reference on the root, leaving v_usecount=1 to prevent
- the vnode from beeing freed: */
- vnode_put(priv_mnt_data->synthfs_rootvp);
-
- return (0);
-}
-
-
-
-int
-synthfs_mount(mp, devvp, data, context)
- register struct mount *mp;
- vnode_t devvp;
- user_addr_t data;
- vfs_context_t context;
-{
- size_t size;
-
- return (synthfs_mount_fs(mp, devvp, data, vfs_context_proc(context)));
-}
-
-
-
-
-
-
-/*
- * Initialize the filesystem
- */
-int
-synthfs_init(vfsp)
- struct vfsconf *vfsp;
-{
- DBG_VOP(("synthfs_init called.\n"));
- return 0;
-}
-
-int
-synthfs_start(mp, flags, context)
-struct mount * mp;
-int flags;
-vfs_context_t context;
-{
- DBG_VOP(("synthfs_start called.\n"));
- return 0;
-}
-
-/*
- * Return the root of a filesystem.
- */
-int
-synthfs_root(mp, vpp, context)
- struct mount *mp;
- struct vnode **vpp;
- vfs_context_t context;
-{
- unsigned long root_nodeid = ROOT_DIRID;
-
- DBG_VOP(("synthfs_root called.\n"));
-
- *vpp = VFSTOSFS(mp)->synthfs_rootvp;
- return vnode_get(VFSTOSFS(mp)->synthfs_rootvp);
-}
-
-/*
- * unmount system call
- */
-int
-synthfs_unmount(mp, mntflags, context)
- struct mount *mp;
- int mntflags;
- vfs_context_t context;
-{
- struct synthfs_mntdata *synth;
- struct vnode *root_vp;
- int retval;
-
- DBG_VOP(("synthfs_unmount called.\n"));
- synth = (struct synthfs_mntdata *)mp->mnt_data;
-
- root_vp = synth->synthfs_rootvp;
- retval = vflush(mp, root_vp, (mntflags & MNT_FORCE) ? FORCECLOSE : 0);
- if (retval && ((mntflags & MNT_FORCE) == 0)) goto Err_Exit;
-
- /* Free the root vnode.
- the ref. count has been maintained at +1 ever since mount time. */
- if (root_vp) {
- if ((mntflags & MNT_FORCE) == 0) {
- if (retval) goto Err_Exit;
-
- if (root_vp->v_usecount > 1) {
- DBG_VOP(("synthfs ERROR: root vnode = %x, usecount = %d\n", (int)root_vp, synth->synthfs_rootvp->v_usecount));
- retval = EBUSY;
- goto Err_Exit;
- };
- };
-
- synth->synthfs_rootvp = NULL;
-
- if (retval == 0) {
- vnode_get(root_vp);
- vnode_rele(root_vp);
- vnode_recycle(root_vp);
- vnode_put(root_vp); /* This drops synthfs's own refcount */
- };
- };
-
- /* All vnodes should be gone, and no errors, clean up the last */
-
- mp->mnt_data = NULL;
- FREE(synth, M_SYNTHFS);
-
-Err_Exit:
-
- if (mntflags & MNT_FORCE) retval = 0;
-
- return(retval);
-}
-
-/*
- * Get file system statistics.
- */
-int
-synthfs_vfs_getattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
-{
- struct synthfs_mntdata *synthfs_mp = VFSTOSFS(mp);
- DBG_VOP(("synthfs_vfs_getattr called.\n"));
-
- VFSATTR_RETURN(fsap, f_bsize, 512);
- VFSATTR_RETURN(fsap, f_iosize, 512);
- VFSATTR_RETURN(fsap, f_blocks, 1024);
- VFSATTR_RETURN(fsap, f_bfree, 0);
- VFSATTR_RETURN(fsap, f_bavail, 0);
- VFSATTR_RETURN(fsap, f_bused, 1024);
- VFSATTR_RETURN(fsap, f_files, synthfs_mp->synthfs_filecount + synthfs_mp->synthfs_dircount);
- VFSATTR_RETURN(fsap, f_ffree, 0);
- VFSATTR_RETURN(fsap, f_fssubtype, 0);
-
- return 0;
-}
-
-/*
- * synthfs doesn't have any data or backing store and you can't write into any of the synthfs
- * structures, so don't do anything
- */
-int
-synthfs_sync(mp, waitfor, context)
- struct mount *mp;
- int waitfor;
- vfs_context_t context;
-{
-// DBG_VOP(("synthfs_sync called\n"));
- return 0;
-}
-/*
- * Look up a synthfs node by node number.
- */
-int
-synthfs_vget(mp, ino, vpp, context)
- struct mount *mp;
- ino64_t ino;
- struct vnode **vpp;
- vfs_context_t context;
-{
- struct vnode *vp;
- int vid = 0;
-
-// DBG_VOP(("synthfs_vget called\n"));
-
- /* Check for unmount in progress */
- if (mp->mnt_kern_flag & MNTK_UNMOUNT) {
- *vpp = NULL;
- return (EPERM);
- }
-
-loop:
- TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) {
- if (VTOS(vp)->s_nodeid == (unsigned long)ino) {
- /*
- * doing a vnode_getwithvid isn't technically
- * necessary since synthfs is an unsafe filesystem
- * and we're running behind a funnel at this point
- * however, vnode_get always succeeds, which isn't
- * what we want if this vnode is in the process of
- * being terminated
- */
- vid = vnode_vid(vp);
-
- if (vnode_getwithvid(vp, vid) != 0) {
- goto loop;
- };
- *vpp = vp;
- return 0;
- };
- };
- *vpp = NULL;
- return -1;
-}
-
-/*
- * fast filesystem related variables.
- */
-int
-synthfs_sysctl(int *name, u_int namelen, user_addr_t oldp, size_t *oldlenp,
- user_addr_t newp, size_t newlen, vfs_context_t context)
-{
- DBG_VOP(("synthfs_sysctl called.\n"));
- return (ENOTSUP);
-}
-
-/*
- * File handle to vnode
- *
- */
-int
-synthfs_fhtovp(mp, fhlen, fhp, vpp, context)
- register struct mount *mp;
- int fhlen;
- unsigned char *fhp;
- struct vnode **vpp;
- vfs_context_t context;
-{
- DBG_VOP(("synthfs_fhtovp called.\n"));
- return ENOTSUP;
-}
-
-/*
- * Vnode pointer to File handle
- */
-/* ARGSUSED */
-int
-synthfs_vptofh(vp, fhlenp, fhp, context)
- struct vnode *vp;
- int *fhlenp;
- unsigned char *fhp;
- vfs_context_t context;
-{
- DBG_VOP(("synthfs_vptofh called.\n"));
- return ENOTSUP;
-}
-
-
-
-
-
-
-int
-vn_mkdir(struct proc *p, char *path, int mode)
-{
- struct nameidata nd;
- struct vnode *vp;
- struct vnode_attr va;
- vfs_context_t ctx = vfs_context_kernel();
- int error;
-
-
- NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE32, CAST_USER_ADDR_T(path), ctx);
- error = namei(&nd);
- if (error) {
- DBG_VOP(("vn_mkdir: error from namei, error = %d.\n", error));
- return (error);
- };
- vp = nd.ni_vp;
-
- if (vp == NULL) {
- VATTR_INIT(&va);
- VATTR_SET(&va, va_type, VDIR);
- VATTR_SET(&va, va_mode, (mode & ACCESSPERMS) &~ p->p_fd->fd_cmask);
-
- error = vn_create(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, 0, ctx);
- if (error)
- DBG_VOP(("vn_mkdir: error from vnop_mkdir (%d).\n", error));
- } else {
- DBG_VOP(("vn_mkdir: target already exists; returning EEXIST.\n"));
- error = EEXIST;
- }
- vnode_put(nd.ni_dvp);
- if (nd.ni_vp)
- vnode_put(nd.ni_vp);
- nameidone(&nd);
-
- return (error);
-}
-
-
-
-int
-vn_symlink(struct proc *p, char *path, char *link) {
- struct nameidata nd;
- struct vnode_attr va;
- vfs_context_t ctx = vfs_context_kernel();
- int error;
-
- NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE32, CAST_USER_ADDR_T(link), ctx);
- if ((error = namei(&nd))) {
- return error;
- }
-
- if (nd.ni_vp == NULL) {
- VATTR_INIT(&va);
- VATTR_SET(&va, va_type, VLNK);
- VATTR_SET(&va, va_mode, ACCESSPERMS &~ p->p_fd->fd_cmask);
-
- error = VNOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &va, path, ctx);
- } else
- error = EEXIST;
-
- vnode_put(nd.ni_dvp);
- if (nd.ni_vp)
- vnode_put(nd.ni_vp);
- nameidone(&nd);
-
- return (error);
-}
-
-
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