Пример #1
0
/*
 * Mount the per-process file descriptors (/dev/fd)
 */
int
fdesc_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
	struct lwp *l = curlwp;
	int error = 0;
	struct vnode *rvp;

	if (mp->mnt_flag & MNT_GETARGS) {
		*data_len = 0;
		return 0;
	}
	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp);
	if (error)
		return (error);

	rvp->v_type = VDIR;
	rvp->v_vflag |= VV_ROOT;
	mp->mnt_stat.f_namemax = FDESC_MAXNAMLEN;
	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_data = rvp;
	vfs_getnewfsid(mp);

	error = set_statvfs_info(path, UIO_USERSPACE, "fdesc", UIO_SYSSPACE,
	    mp->mnt_op->vfs_name, mp, l);
	VOP_UNLOCK(rvp);
	return error;
}
Пример #2
0
/*
 * Mount a pseudofs instance
 */
int
pfs_mount(struct pfs_info *pi, struct mount *mp)
{
	struct statfs *sbp;

	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	MNT_ILOCK(mp);
	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_kern_flag |= MNTK_MPSAFE;
	MNT_IUNLOCK(mp);
	mp->mnt_data = pi;
	vfs_getnewfsid(mp);

	sbp = &mp->mnt_stat;
	vfs_mountedfrom(mp, pi->pi_name);
	sbp->f_bsize = PAGE_SIZE;
	sbp->f_iosize = PAGE_SIZE;
	sbp->f_blocks = 1;
	sbp->f_bfree = 0;
	sbp->f_bavail = 0;
	sbp->f_files = 1;
	sbp->f_ffree = 0;

	return (0);
}
Пример #3
0
/* ARGSUSED */
static int
linprocfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
{
	size_t size;
	int error;

	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(linprocfs_exit))) {
		kprintf("linprocfs:  cannot register linprocfs_exit with at_exit\n");
		return(error);
	}

	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_kern_flag |= MNTK_NOSTKMNT;
	mp->mnt_data = 0;
	vfs_getnewfsid(mp);

	vfs_add_vnodeops(mp, &linprocfs_vnode_vops, &mp->mnt_vn_norm_ops);

	size = sizeof("linprocfs") - 1;
	bcopy("linprocfs", mp->mnt_stat.f_mntfromname, size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	(void)linprocfs_statfs(mp, &mp->mnt_stat, cred);

	return (0);
}
Пример #4
0
/* ARGSUSED */
int
procfs_mount(
    struct mount *mp,
    const char *path,
    void *data,
    size_t *data_len)
{
	struct lwp *l = curlwp;
	struct procfsmount *pmnt;
	struct procfs_args *args = data;
	int error;

	if (args == NULL)
		return EINVAL;

	if (UIO_MX & (UIO_MX-1)) {
		log(LOG_ERR, "procfs: invalid directory entry size");
		return (EINVAL);
	}

	if (mp->mnt_flag & MNT_GETARGS) {
		if (*data_len < sizeof *args)
			return EINVAL;

		pmnt = VFSTOPROC(mp);
		if (pmnt == NULL)
			return EIO;
		args->version = PROCFS_ARGSVERSION;
		args->flags = pmnt->pmnt_flags;
		*data_len = sizeof *args;
		return 0;
	}

	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	if (*data_len >= sizeof *args && args->version != PROCFS_ARGSVERSION)
		return EINVAL;

	pmnt = kmem_zalloc(sizeof(struct procfsmount), KM_SLEEP);

	mp->mnt_stat.f_namemax = PROCFS_MAXNAMLEN;
	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_data = pmnt;
	vfs_getnewfsid(mp);

	error = set_statvfs_info(path, UIO_USERSPACE, "procfs", UIO_SYSSPACE,
	    mp->mnt_op->vfs_name, mp, l);
	pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp);
	if (*data_len >= sizeof *args)
		pmnt->pmnt_flags = args->flags;
	else
		pmnt->pmnt_flags = 0;

	mp->mnt_iflag |= IMNT_MPSAFE;
	return error;
}
Пример #5
0
/*
 * Mount the filesystem
 */
static int
devfs_mount(struct mount *mp)
{
	int error;
	struct devfs_mount *fmp;
	struct vnode *rvp;

	if (devfs_unr == NULL)
		devfs_unr = new_unrhdr(0, INT_MAX, NULL);

	error = 0;

	if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
		return (EOPNOTSUPP);

	fmp = malloc(sizeof *fmp, M_DEVFS, M_WAITOK | M_ZERO);
	fmp->dm_idx = alloc_unr(devfs_unr);
	sx_init(&fmp->dm_lock, "devfsmount");
	fmp->dm_holdcnt = 1;

	MNT_ILOCK(mp);
	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED |
	    MNTK_EXTENDED_SHARED;
#ifdef MAC
	mp->mnt_flag |= MNT_MULTILABEL;
#endif
	MNT_IUNLOCK(mp);
	fmp->dm_mount = mp;
	mp->mnt_data = (void *) fmp;
	vfs_getnewfsid(mp);

	fmp->dm_rootdir = devfs_vmkdir(fmp, NULL, 0, NULL, DEVFS_ROOTINO);

	error = devfs_root(mp, LK_EXCLUSIVE, &rvp);
	if (error) {
		sx_destroy(&fmp->dm_lock);
		free_unr(devfs_unr, fmp->dm_idx);
		free(fmp, M_DEVFS);
		return (error);
	}

	VOP_UNLOCK(rvp, 0);

	vfs_mountedfrom(mp, "devfs");

	return (0);
}
Пример #6
0
/* ARGSUSED */
int
procfs_mount(struct mount *mp, const char *path, void *data, struct nameidata *ndp,
    struct proc *p)
{
	struct procfsmount *pmnt;
	struct procfs_args args;
	int error;

	if (UIO_MX & (UIO_MX-1)) {
		log(LOG_ERR, "procfs: invalid directory entry size");
		return (EINVAL);
	}

	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	if (data != NULL) {
		error = copyin(data, &args, sizeof(args));
		if (error != 0)
			return (error);

		if (args.version != PROCFS_ARGSVERSION)
			return (EINVAL);
	} else
		args.flags = 0;

	mp->mnt_flag |= MNT_LOCAL;
	pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount),
	    M_MISCFSMNT, M_WAITOK);

	mp->mnt_data = pmnt;
	vfs_getnewfsid(mp);

	bzero(mp->mnt_stat.f_mntonname, MNAMELEN);
	strlcpy(mp->mnt_stat.f_mntonname, path, MNAMELEN);
	bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
	bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs"));
	bzero(mp->mnt_stat.f_mntfromspec, MNAMELEN);
	bcopy("procfs", mp->mnt_stat.f_mntfromspec, sizeof("procfs"));
	bcopy(&args, &mp->mnt_stat.mount_info.procfs_args, sizeof(args));

#ifdef notyet
	pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp);
#endif
	pmnt->pmnt_flags = args.flags;

	return (0);
}
Пример #7
0
afs_omount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
	THREAD_OR_PROC)
#endif
{
    /* ndp contains the mounted-from device.  Just ignore it.
     * we also don't care about our proc struct. */
    size_t size;

    if (mp->mnt_flag & MNT_UPDATE)
	return EINVAL;

    AFS_GLOCK();
    AFS_STATCNT(afs_mount);

    if (afs_globalVFS) {	/* Don't allow remounts. */
	AFS_GUNLOCK();
	return EBUSY;
    }

    afs_globalVFS = mp;
    mp->vfs_bsize = 8192;
    vfs_getnewfsid(mp);
#ifdef AFS_FBSD70_ENV /* XXX 70? */
    MNT_ILOCK(mp);
    mp->mnt_flag &= ~MNT_LOCAL;
    mp->mnt_kern_flag |= MNTK_MPSAFE; /* solid steel */
#endif
    mp->mnt_stat.f_iosize = 8192;

    if (path != NULL)
	copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
    else
	bcopy("/afs", mp->mnt_stat.f_mntonname, size = 4);
    memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
    memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
    strcpy(mp->mnt_stat.f_mntfromname, "AFS");
    /* null terminated string "AFS" will fit, just leave it be. */
    strcpy(mp->mnt_stat.f_fstypename, "afs");
#ifdef AFS_FBSD70_ENV
    MNT_IUNLOCK(mp);
#endif
    AFS_GUNLOCK();
    afs_statfs(mp, &mp->mnt_stat, p);

    return 0;
}
Пример #8
0
/*
 * Mount the per-process file descriptors (/dev/fd)
 */
static int
fdesc_mount(struct mount *mp)
{
	int error = 0;
	struct fdescmount *fmp;
	struct vnode *rvp;

	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
		return (EOPNOTSUPP);

	fmp = malloc(sizeof(struct fdescmount),
				M_FDESCMNT, M_WAITOK);	/* XXX */

	/*
	 * We need to initialize a few bits of our local mount point struct to
	 * avoid confusion in allocvp.
	 */
	mp->mnt_data = (qaddr_t) fmp;
	fmp->flags = 0;
	error = fdesc_allocvp(Froot, -1, FD_ROOT, mp, &rvp);
	if (error) {
		free(fmp, M_FDESCMNT);
		mp->mnt_data = 0;
		return (error);
	}
	rvp->v_type = VDIR;
	rvp->v_vflag |= VV_ROOT;
	fmp->f_root = rvp;
	VOP_UNLOCK(rvp, 0);
	/* XXX -- don't mark as local to work around fts() problems */
	/*mp->mnt_flag |= MNT_LOCAL;*/
	MNT_ILOCK(mp);
	mp->mnt_kern_flag |= MNTK_MPSAFE;
	MNT_IUNLOCK(mp);
	vfs_getnewfsid(mp);

	vfs_mountedfrom(mp, "fdescfs");
	return (0);
}
Пример #9
0
/*
 * Mount the per-process file descriptors (/dev/fd)
 */
static int
fdesc_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
{
	int error = 0;
	struct fdescmount *fmp;
	struct vnode *rvp;

	if (path == NULL)
		panic("fdesc_mount: cannot mount as root");

	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	vfs_add_vnodeops(mp, &fdesc_vnode_vops, &mp->mnt_vn_norm_ops);

	error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp);
	if (error)
		return (error);

	fmp = kmalloc(sizeof(struct fdescmount), M_FDESCMNT, M_WAITOK);	/* XXX */
	rvp->v_type = VDIR;
	vsetflags(rvp, VROOT);
	fmp->f_root = rvp;
	/* XXX -- don't mark as local to work around fts() problems */
	/*mp->mnt_flag |= MNT_LOCAL;*/
	mp->mnt_data = (qaddr_t) fmp;
	vfs_getnewfsid(mp);

	bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
	bcopy("fdesc", mp->mnt_stat.f_mntfromname, sizeof("fdesc"));
	fdesc_statfs(mp, &mp->mnt_stat, cred);
	return (0);
}
Пример #10
0
static int
smbfs_mount(struct mount *mp)
{
	struct smbmount *smp = NULL;
	struct smb_vc *vcp;
	struct smb_share *ssp = NULL;
	struct vnode *vp;
	struct thread *td;
	struct smb_dev *dev;
	struct smb_cred *scred;
	int error, v;
	char *pc, *pe;

	dev = NULL;
	td = curthread;
	if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
		return EOPNOTSUPP;

	if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
		vfs_mount_error(mp, "%s", "Invalid option");
		return (EINVAL);
	}

	scred = smbfs_malloc_scred();
	smb_makescred(scred, td, td->td_ucred);
	
	/* Ask userspace of `fd`, the file descriptor of this session */
	if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) {
		vfs_mount_error(mp, "No fd option");
		smbfs_free_scred(scred);
		return (EINVAL);
	}
	error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev);
	smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO);
	if (error) {
		printf("invalid device handle %d (%d)\n", v, error);
		vfs_mount_error(mp, "invalid device handle %d %d\n", v, error);
		smbfs_free_scred(scred);
		free(smp, M_SMBFSDATA);
		return error;
	}
	vcp = SSTOVC(ssp);
	smb_share_unlock(ssp);
	mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
	mp->mnt_data = smp;
	smp->sm_share = ssp;
	smp->sm_root = NULL;
	smp->sm_dev = dev;
	if (1 != vfs_scanopt(mp->mnt_optnew,
	    "caseopt", "%d", &smp->sm_caseopt)) {
		vfs_mount_error(mp, "Invalid caseopt");
		error = EINVAL;
		goto bad;
	}
	if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
		vfs_mount_error(mp, "Invalid uid");
		error = EINVAL;
		goto bad;
	}
	smp->sm_uid = v;

	if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
		vfs_mount_error(mp, "Invalid gid");
		error = EINVAL;
		goto bad;
	}
	smp->sm_gid = v;

	if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
		vfs_mount_error(mp, "Invalid file_mode");
		error = EINVAL;
		goto bad;
	}
	smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;

	if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
		vfs_mount_error(mp, "Invalid dir_mode");
		error = EINVAL;
		goto bad;
	}
	smp->sm_dir_mode  = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;

	vfs_flagopt(mp->mnt_optnew,
	    "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);

	pc = mp->mnt_stat.f_mntfromname;
	pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
	bzero(pc, MNAMELEN);
	*pc++ = '/';
	*pc++ = '/';
	pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
	if (pc < pe-1) {
		*(pc++) = '@';
		pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
		if (pc < pe - 1) {
			*(pc++) = '/';
			strncpy(pc, ssp->ss_name, pe - pc - 2);
		}
	}
	vfs_getnewfsid(mp);
	error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
	if (error) {
		vfs_mount_error(mp, "smbfs_root error: %d", error);
		goto bad;
	}
	VOP_UNLOCK(vp, 0);
	SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));

#ifdef DIAGNOSTIC
	SMBERROR("mp=%p\n", mp);
#endif
	smbfs_free_scred(scred);
	return error;
bad:
	if (ssp)
		smb_share_put(ssp, scred);
	smbfs_free_scred(scred);	
	SMB_LOCK();
	if (error && smp->sm_dev == dev) {
		smp->sm_dev = NULL;
		sdp_trydestroy(dev);
	}
	SMB_UNLOCK();
	free(smp, M_SMBFSDATA);
	return error;
}
Пример #11
0
/*
 * Mount null layer
 */
static int
nullfs_mount(struct mount * mp, __unused vnode_t devvp, user_addr_t user_data, vfs_context_t ctx)
{
	int error                 = 0;
	struct vnode *lowerrootvp = NULL, *vp = NULL;
	struct vfsstatfs * sp   = NULL;
	struct null_mount * xmp = NULL;
	char data[MAXPATHLEN];
	size_t count;
	struct vfs_attr vfa;
	/* set defaults (arbitrary since this file system is readonly) */
	uint32_t bsize  = BLKDEV_IOSIZE;
	size_t iosize   = BLKDEV_IOSIZE;
	uint64_t blocks = 4711 * 4711;
	uint64_t bfree  = 0;
	uint64_t bavail = 0;
	uint64_t bused  = 4711;
	uint64_t files  = 4711;
	uint64_t ffree  = 0;

	kauth_cred_t cred = vfs_context_ucred(ctx);

	NULLFSDEBUG("nullfs_mount(mp = %p) %llx\n", (void *)mp, vfs_flags(mp));

	if (vfs_flags(mp) & MNT_ROOTFS)
		return (EOPNOTSUPP);

	/*
	 * Update is a no-op
	 */
	if (vfs_isupdate(mp)) {
		return ENOTSUP;
	}

	/* check entitlement */
	if (!IOTaskHasEntitlement(current_task(), NULLFS_ENTITLEMENT)) {
		return EPERM;
	}

	/*
	 * Get argument
	 */
	error = copyinstr(user_data, data, MAXPATHLEN - 1, &count);
	if (error) {
		NULLFSDEBUG("nullfs: error copying data form user %d\n", error);
		goto error;
	}

	/* This could happen if the system is configured for 32 bit inodes instead of
	 * 64 bit */
	if (count > MAX_MNT_FROM_LENGTH) {
		error = EINVAL;
		NULLFSDEBUG("nullfs: path to translocate too large for this system %d vs %d\n", count, MAX_MNT_FROM_LENGTH);
		goto error;
	}

	error = vnode_lookup(data, 0, &lowerrootvp, ctx);
	if (error) {
		NULLFSDEBUG("lookup %s -> %d\n", data, error);
		goto error;
	}

	/* lowervrootvp has an iocount after vnode_lookup, drop that for a usecount.
	   Keep this to signal what we want to keep around the thing we are mirroring.
	   Drop it in unmount.*/
	error = vnode_ref(lowerrootvp);
	vnode_put(lowerrootvp);
	if (error)
	{
		// If vnode_ref failed, then null it out so it can't be used anymore in cleanup.
		lowerrootvp = NULL;
		goto error;
	}

	NULLFSDEBUG("mount %s\n", data);

	MALLOC(xmp, struct null_mount *, sizeof(*xmp), M_TEMP, M_WAITOK | M_ZERO);
	if (xmp == NULL) {
		error = ENOMEM;
		goto error;
	}

	/*
	 * Save reference to underlying FS
	 */
	xmp->nullm_lowerrootvp  = lowerrootvp;
	xmp->nullm_lowerrootvid = vnode_vid(lowerrootvp);

	error = null_getnewvnode(mp, NULL, NULL, &vp, NULL, 1);
	if (error) {
		goto error;
	}

	/* vp has an iocount on it from vnode_create. drop that for a usecount. This
	 * is our root vnode so we drop the ref in unmount
	 *
	 * Assuming for now that because we created this vnode and we aren't finished mounting we can get a ref*/
	vnode_ref(vp);
	vnode_put(vp);

	error = nullfs_init_lck(&xmp->nullm_lock);
	if (error) {
		goto error;
	}

	xmp->nullm_rootvp = vp;

	/* read the flags the user set, but then ignore some of them, we will only
	   allow them if they are set on the lower file system */
	uint64_t flags      = vfs_flags(mp) & (~(MNT_IGNORE_OWNERSHIP | MNT_LOCAL));
	uint64_t lowerflags = vfs_flags(vnode_mount(lowerrootvp)) & (MNT_LOCAL | MNT_QUARANTINE | MNT_IGNORE_OWNERSHIP | MNT_NOEXEC);

	if (lowerflags) {
		flags |= lowerflags;
	}

	/* force these flags */
	flags |= (MNT_DONTBROWSE | MNT_MULTILABEL | MNT_NOSUID | MNT_RDONLY);
	vfs_setflags(mp, flags);

	vfs_setfsprivate(mp, xmp);
	vfs_getnewfsid(mp);
	vfs_setlocklocal(mp);

	/* fill in the stat block */
	sp = vfs_statfs(mp);
	strlcpy(sp->f_mntfromname, data, MAX_MNT_FROM_LENGTH);

	sp->f_flags = flags;

	xmp->nullm_flags = NULLM_CASEINSENSITIVE; /* default to case insensitive */

	error = nullfs_vfs_getlowerattr(vnode_mount(lowerrootvp), &vfa, ctx);
	if (error == 0) {
		if (VFSATTR_IS_SUPPORTED(&vfa, f_bsize)) {
			bsize = vfa.f_bsize;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_iosize)) {
			iosize = vfa.f_iosize;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_blocks)) {
			blocks = vfa.f_blocks;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_bfree)) {
			bfree = vfa.f_bfree;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_bavail)) {
			bavail = vfa.f_bavail;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_bused)) {
			bused = vfa.f_bused;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_files)) {
			files = vfa.f_files;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_ffree)) {
			ffree = vfa.f_ffree;
		}
		if (VFSATTR_IS_SUPPORTED(&vfa, f_capabilities)) {
			if ((vfa.f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] & (VOL_CAP_FMT_CASE_SENSITIVE)) &&
			    (vfa.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & (VOL_CAP_FMT_CASE_SENSITIVE))) {
				xmp->nullm_flags &= ~NULLM_CASEINSENSITIVE;
			}
		}
	} else {
		goto error;
	}

	sp->f_bsize  = bsize;
	sp->f_iosize = iosize;
	sp->f_blocks = blocks;
	sp->f_bfree  = bfree;
	sp->f_bavail = bavail;
	sp->f_bused  = bused;
	sp->f_files  = files;
	sp->f_ffree  = ffree;

	/* Associate the mac label information from the mirrored filesystem with the
	 * mirror */
	MAC_PERFORM(mount_label_associate, cred, vnode_mount(lowerrootvp), vfs_mntlabel(mp));

	NULLFSDEBUG("nullfs_mount: lower %s, alias at %s\n", sp->f_mntfromname, sp->f_mntonname);
	return (0);

error:
	if (xmp) {
		FREE(xmp, M_TEMP);
	}
	if (lowerrootvp) {
		vnode_getwithref(lowerrootvp);
		vnode_rele(lowerrootvp);
		vnode_put(lowerrootvp);
	}
	if (vp) {
		/* we made the root vnode but the mount is failed, so clean it up */
		vnode_getwithref(vp);
		vnode_rele(vp);
		/* give vp back */
		vnode_recycle(vp);
		vnode_put(vp);
	}
	return error;
}
Пример #12
0
static int
vfs_mount_9p(mount_t mp, vnode_t devvp, user_addr_t data, vfs_context_t ctx)
{
#pragma unused(devvp)
	struct sockaddr *addr, *authaddr;
	struct vfsstatfs *sp;
	char authkey[DESKEYLEN+1];
	kauth_cred_t cred;
	user_args_9p args;
	mount_9p *nmp;
	size_t size;
	fid_9p fid;
	qid_9p qid;
	char *vers;
	int e;

	TRACE();
	nmp = NULL;
	addr = NULL;
	authaddr = NULL;
	fid = NOFID;

	if (vfs_isupdate(mp))
		return ENOTSUP;

	if (vfs_context_is64bit(ctx)) {
		if ((e=copyin(data, &args, sizeof(args))))
			goto error;
	} else {
		args_9p args32;
		if ((e=copyin(data, &args32, sizeof(args32))))
			goto error;
		args.spec			= CAST_USER_ADDR_T(args32.spec);
		args.addr			= CAST_USER_ADDR_T(args32.addr);
		args.addrlen		= args32.addrlen;
		args.authaddr		= CAST_USER_ADDR_T(args32.authaddr);
		args.authaddrlen	= args32.authaddrlen;
		args.volume			= CAST_USER_ADDR_T(args32.volume);
		args.uname			= CAST_USER_ADDR_T(args32.uname);
		args.aname			= CAST_USER_ADDR_T(args32.aname);
		args.authkey		= CAST_USER_ADDR_T(args32.authkey);
		args.flags			= args32.flags;
	}
	e = ENOMEM;
	nmp = malloc_9p(sizeof(*nmp));
	if (nmp == NULL)
		return e;

	nmp->mp = mp;
	TAILQ_INIT(&nmp->req);
	nmp->lck = lck_mtx_alloc_init(lck_grp_9p, LCK_ATTR_NULL);
	nmp->reqlck = lck_mtx_alloc_init(lck_grp_9p, LCK_ATTR_NULL);
	nmp->nodelck = lck_mtx_alloc_init(lck_grp_9p, LCK_ATTR_NULL);
	nmp->node = hashinit(desiredvnodes, M_TEMP, &nmp->nodelen);
	if (nmp->lck==NULL || nmp->reqlck==NULL || nmp->nodelck==NULL || nmp->node==NULL)
		goto error;

	if ((e=nameget_9p(args.volume, &nmp->volume)))
		goto error;
	if ((e=nameget_9p(args.uname, &nmp->uname)))
		goto error;
	if ((e=nameget_9p(args.aname, &nmp->aname)))
		goto error;

	cred = vfs_context_ucred(ctx);
	if (IS_VALID_CRED(cred)) {
		nmp->uid = kauth_cred_getuid(cred);
		nmp->gid = kauth_cred_getgid(cred);
	} else {
		nmp->uid = KAUTH_UID_NONE;
		nmp->gid = KAUTH_GID_NONE;
	}
	
	vfs_getnewfsid(mp);
	vfs_setfsprivate(mp, nmp);
	
	nmp->flags = args.flags;
	if ((e=addrget_9p(args.addr, args.addrlen, &addr)))
		goto error;
	if ((e=connect_9p(nmp, addr)))
		goto error;

	vers = VERSION9P;
	if (ISSET(nmp->flags, FLAG_DOTU))
		vers = VERSION9PDOTU;
	if ((e=version_9p(nmp, vers, &nmp->version)))
		goto error;
	if (ISSET(nmp->flags, FLAG_DOTU) && strcmp(VERSION9PDOTU, nmp->version)==0)
		SET(nmp->flags, F_DOTU);

	nmp->afid = NOFID;
	if (args.authaddr && args.authaddrlen && args.authkey) {
		if ((e=copyin(args.authkey, authkey, DESKEYLEN)))
			goto error;
		if ((e=addrget_9p(args.authaddr, args.authaddrlen, &authaddr)))
			goto error;
		if ((e=auth_9p(nmp, nmp->uname, nmp->aname, nmp->uid, &nmp->afid, &qid)))
			goto error;
		if (nmp->afid!=NOFID &&
			(e=authp9any_9p(nmp, nmp->afid, authaddr, nmp->uname, authkey)))
			goto error;
		bzero(authkey, DESKEYLEN);
	}
	if ((e=attach_9p(nmp, nmp->uname, nmp->aname, nmp->afid, nmp->uid, &fid, &qid)))
		goto error;

	if ((e=nget_9p(nmp, fid, qid, NULL, &nmp->root, NULL, ctx)))
		goto error;

	nunlock_9p(NTO9P(nmp->root));
	e = vnode_ref(nmp->root);
	vnode_put(nmp->root);
	if (e)
		goto error;

	vfs_setauthopaque(mp);
	vfs_clearauthopaqueaccess(mp);
	vfs_setlocklocal(mp);

	// init stats
	sp = vfs_statfs(nmp->mp);
	copyinstr(args.spec, sp->f_mntfromname, MNAMELEN-1, &size);
	bzero(sp->f_mntfromname+size, MNAMELEN-size);
	sp->f_bsize = PAGE_SIZE;
	sp->f_iosize = nmp->msize-IOHDRSZ;
	sp->f_blocks = sp->f_bfree = sp->f_bavail = sp->f_bused = 0;
	sp->f_files = 65535;
	sp->f_ffree = sp->f_files-2;
	sp->f_flags = vfs_flags(mp);
	
	free_9p(addr);
	free_9p(authaddr);
	return 0;

error:
	bzero(authkey, DESKEYLEN);
	free_9p(addr);
	free_9p(authaddr);
	if (nmp->so) {
		clunk_9p(nmp, fid);
		disconnect_9p(nmp);
	}
	freemount_9p(nmp);
	vfs_setfsprivate(mp, NULL);
	return e;
}
Пример #13
0
static int
zfs_domount(struct mount *mp, dev_t mount_dev, char *osname, vfs_context_t ctx)
{
	uint64_t readonly;
	int error = 0;
	int mode;
	zfsvfs_t *zfsvfs;
	znode_t *zp = NULL;
	struct timeval tv;

	ASSERT(mp);
	ASSERT(osname);

	/*
	 * Initialize the zfs-specific filesystem structure.
	 * Should probably make this a kmem cache, shuffle fields,
	 * and just bzero up to z_hold_mtx[].
	 */
	zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP);
	zfsvfs->z_vfs = mp;
	zfsvfs->z_parent = zfsvfs;
	zfsvfs->z_assign = TXG_NOWAIT;
	zfsvfs->z_max_blksz = SPA_MAXBLOCKSIZE;
	zfsvfs->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;

	mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL);
	list_create(&zfsvfs->z_all_znodes, sizeof (znode_t),
	    offsetof(znode_t, z_link_node));
	rw_init(&zfsvfs->z_unmount_lock, NULL, RW_DEFAULT, NULL);
	rw_init(&zfsvfs->z_unmount_inactive_lock, NULL, RW_DEFAULT, NULL);
#ifndef __APPLE__
	/* Initialize the generic filesystem structure. */
	vfsp->vfs_bcount = 0;
	vfsp->vfs_data = NULL;

	if (zfs_create_unique_device(&mount_dev) == -1) {
		error = ENODEV;
		goto out;
	}
	ASSERT(vfs_devismounted(mount_dev) == 0);
#endif

	vfs_setfsprivate(mp, zfsvfs);

	if (error = dsl_prop_get_integer(osname, "readonly", &readonly, NULL))
		goto out;

	if (readonly) {
		mode = DS_MODE_PRIMARY | DS_MODE_READONLY;
		vfs_setflags(mp, (u_int64_t)((unsigned int)MNT_RDONLY));
	} else {
		mode = DS_MODE_PRIMARY;
	}
	error = dmu_objset_open(osname, DMU_OST_ZFS, mode, &zfsvfs->z_os);
	if (error == EROFS) {
		mode = DS_MODE_PRIMARY | DS_MODE_READONLY;
		error = dmu_objset_open(osname, DMU_OST_ZFS, mode,
		    &zfsvfs->z_os);
	}

	if (error)
		goto out;

	if (error = zfs_init_fs(zfsvfs, &zp, (cred_t *) vfs_context_ucred(ctx)))
		goto out;

	/* The call to zfs_init_fs leaves the vnode held, release it here. */
	vnode_put(ZTOV(zp));

	if (dmu_objset_is_snapshot(zfsvfs->z_os)) {
		uint64_t xattr;

		ASSERT(mode & DS_MODE_READONLY);
#if 0
		atime_changed_cb(zfsvfs, B_FALSE);
		readonly_changed_cb(zfsvfs, B_TRUE);
		if (error = dsl_prop_get_integer(osname, "xattr", &xattr, NULL))
			goto out;
		xattr_changed_cb(zfsvfs, xattr);
#endif
		zfsvfs->z_issnap = B_TRUE;
	} else {
		
		if (!vfs_isrdonly(mp))
			zfs_unlinked_drain(zfsvfs);

#ifndef __APPLE__
		/*
		 * Parse and replay the intent log.
		 *
		 * Because of ziltest, this must be done after
		 * zfs_unlinked_drain().  (Further note: ziltest doesn't
		 * use readonly mounts, where zfs_unlinked_drain() isn't
		 * called.)  This is because ziltest causes spa_sync()
		 * to think it's committed, but actually it is not, so
		 * the intent log contains many txg's worth of changes.
		 *
		 * In particular, if object N is in the unlinked set in
		 * the last txg to actually sync, then it could be
		 * actually freed in a later txg and then reallocated in
		 * a yet later txg.  This would write a "create object
		 * N" record to the intent log.  Normally, this would be
		 * fine because the spa_sync() would have written out
		 * the fact that object N is free, before we could write
		 * the "create object N" intent log record.
		 *
		 * But when we are in ziltest mode, we advance the "open
		 * txg" without actually spa_sync()-ing the changes to
		 * disk.  So we would see that object N is still
		 * allocated and in the unlinked set, and there is an
		 * intent log record saying to allocate it.
		 */
		zil_replay(zfsvfs->z_os, zfsvfs, &zfsvfs->z_assign,
		    zfs_replay_vector);

		if (!zil_disable)
			zfsvfs->z_log = zil_open(zfsvfs->z_os, zfs_get_data);
#endif
	}

#if 0
	if (!zfsvfs->z_issnap)
		zfsctl_create(zfsvfs);
#endif

	/*
	 * Record the mount time (for Spotlight)
	 */
	microtime(&tv);
	zfsvfs->z_mount_time = tv.tv_sec;
	
out:
	if (error) {
		if (zfsvfs->z_os)
			dmu_objset_close(zfsvfs->z_os);
		mutex_destroy(&zfsvfs->z_znodes_lock);
		list_destroy(&zfsvfs->z_all_znodes);
		rw_destroy(&zfsvfs->z_unmount_lock);
		rw_destroy(&zfsvfs->z_unmount_inactive_lock);
		kmem_free(zfsvfs, sizeof (zfsvfs_t));
	} else {
		OSIncrementAtomic(&zfs_active_fs_count);
		(void) copystr(osname, vfs_statfs(mp)->f_mntfromname, MNAMELEN - 1, 0);
		vfs_getnewfsid(mp);
	}

	return (error);
}
Пример #14
0
/*ARGSUSED*/
int
coda_mount(struct mount *vfsp)
{
	struct vnode *dvp;
	struct cnode *cp;
	struct cdev *dev;
	struct coda_mntinfo *mi;
	struct vnode *rootvp;
	struct CodaFid rootfid = INVAL_FID;
	struct CodaFid ctlfid = CTL_FID;
	int error;
	struct nameidata ndp;
	ENTRY;
	char *from;

	if (vfs_filteropt(vfsp->mnt_optnew, coda_opts))
		return (EINVAL);
	from = vfs_getopts(vfsp->mnt_optnew, "from", &error);
	if (error)
		return (error);
	coda_vfsopstats_init();
	coda_vnodeopstats_init();
	MARK_ENTRY(CODA_MOUNT_STATS);
	if (CODA_MOUNTED(vfsp)) {
		MARK_INT_FAIL(CODA_MOUNT_STATS);
		return (EBUSY);
	}

	/*
	 * Validate mount device.  Similar to getmdev().
	 */
	NDINIT(&ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, from, curthread);
	error = namei(&ndp);
	dvp = ndp.ni_vp;
	if (error) {
		MARK_INT_FAIL(CODA_MOUNT_STATS);
		return (error);
	}
	if (dvp->v_type != VCHR) {
		MARK_INT_FAIL(CODA_MOUNT_STATS);
		vrele(dvp);
		NDFREE(&ndp, NDF_ONLY_PNBUF);
		return (ENXIO);
	}
	dev = dvp->v_rdev;
	vrele(dvp);
	NDFREE(&ndp, NDF_ONLY_PNBUF);

	/*
	 * Initialize the mount record and link it to the vfs struct.
	 */
	mi = dev2coda_mntinfo(dev);
	if (!mi) {
		MARK_INT_FAIL(CODA_MOUNT_STATS);
		printf("Coda mount: %s is not a cfs device\n", from);
		return (ENXIO);
	}
	if (!VC_OPEN(&mi->mi_vcomm)) {
		MARK_INT_FAIL(CODA_MOUNT_STATS);
		return (ENODEV);
	}

	/*
	 * No initialization (here) of mi_vcomm!
	 */
	vfsp->mnt_data = mi;
	vfs_getnewfsid (vfsp);
	mi->mi_vfsp = vfsp;
	mi->mi_started = 0;			/* XXX See coda_root() */

	/*
	 * Make a root vnode to placate the Vnode interface, but don't
	 * actually make the CODA_ROOT call to venus until the first call to
	 * coda_root in case a server is down while venus is starting.
	 */
	cp = make_coda_node(&rootfid, vfsp, VDIR);
	rootvp = CTOV(cp);
	rootvp->v_vflag |= VV_ROOT;
	cp = make_coda_node(&ctlfid, vfsp, VREG);
	coda_ctlvp = CTOV(cp);

	/*
	 * Add vfs and rootvp to chain of vfs hanging off mntinfo.
	 */
	mi->mi_vfsp = vfsp;
	mi->mi_rootvp = rootvp;
	vfs_mountedfrom(vfsp, from);

	/*
	 * Error is currently guaranteed to be zero, but in case some code
	 * changes...
	 */
	CODADEBUG(1, myprintf(("coda_mount returned %d\n", error)););
Пример #15
0
int
smbfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
	struct lwp *l = curlwp;
	struct smbfs_args *args = data; 	  /* holds data from mount request */
	struct smbmount *smp = NULL;
	struct smb_vc *vcp;
	struct smb_share *ssp = NULL;
	struct smb_cred scred;
	struct proc *p;
	int error;

	if (*data_len < sizeof *args)
		return EINVAL;

	p = l->l_proc;
	if (mp->mnt_flag & MNT_GETARGS) {
		smp = VFSTOSMBFS(mp);
		if (smp == NULL)
			return EIO;
		*args = smp->sm_args;
		*data_len = sizeof *args;
		return 0;
	}

	if (mp->mnt_flag & MNT_UPDATE)
		return EOPNOTSUPP;

	if (args->version != SMBFS_VERSION) {
		SMBVDEBUG("mount version mismatch: kernel=%d, mount=%d\n",
		    SMBFS_VERSION, args->version);
		return EINVAL;
	}

	error = set_statvfs_info(path, UIO_USERSPACE, NULL, UIO_USERSPACE,
	    mp->mnt_op->vfs_name, mp, l);
	if (error)
		return error;

	smb_makescred(&scred, l, l->l_cred);
	error = smb_dev2share(args->dev_fd, SMBM_EXEC, &scred, &ssp);
	if (error)
		return error;
	smb_share_unlock(ssp);	/* keep ref, but unlock */
	vcp = SSTOVC(ssp);
	mp->mnt_stat.f_iosize = vcp->vc_txmax;
	mp->mnt_stat.f_namemax =
	    (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;

	MALLOC(smp, struct smbmount *, sizeof(*smp), M_SMBFSDATA, M_WAITOK);
	memset(smp, 0, sizeof(*smp));
	mp->mnt_data = smp;

	smp->sm_hash = hashinit(desiredvnodes, HASH_LIST, true,
	    &smp->sm_hashlen);

	mutex_init(&smp->sm_hashlock, MUTEX_DEFAULT, IPL_NONE);
	smp->sm_share = ssp;
	smp->sm_root = NULL;
	smp->sm_args = *args;
	smp->sm_caseopt = args->caseopt;
	smp->sm_args.file_mode = (smp->sm_args.file_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
	smp->sm_args.dir_mode  = (smp->sm_args.dir_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;

	memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
	snprintf(mp->mnt_stat.f_mntfromname, MNAMELEN,
	    "//%[email protected]%s/%s", vcp->vc_username, vcp->vc_srvname, ssp->ss_name);

	vfs_getnewfsid(mp);
	return (0);
}
Пример #16
0
int
afs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, CTX_TYPE ctx)
#endif
{
    /* ndp contains the mounted-from device.  Just ignore it.
     * we also don't care about our proc struct. */
    size_t size;
    int error;
#ifdef AFS_DARWIN80_ENV
    struct vfsioattr ioattr;
    /* vfs_statfs advertised as RO, but isn't */
    /* new api will be needed to initialize this information (nfs needs to
       set mntfromname too) */
#endif
    STATFS_TYPE *mnt_stat = vfs_statfs(mp); 

    if (vfs_isupdate(mp))
	return EINVAL;

    AFS_GLOCK();
    AFS_STATCNT(afs_mount);

    if (data == 0 && afs_globalVFS) {	/* Don't allow remounts. */
	AFS_GUNLOCK();
	return (EBUSY);
    }

    afs_globalVFS = mp;
#ifdef AFS_DARWIN80_ENV
    vfs_ioattr(mp, &ioattr);
    ioattr.io_devblocksize = (16 * 32768);
    vfs_setioattr(mp, &ioattr);
    /* f_iosize is handled in VFS_GETATTR */
#else
    mp->vfs_bsize = 8192;
    mp->mnt_stat.f_iosize = 8192;
#endif
    vfs_getnewfsid(mp);

#ifndef AFS_DARWIN80_ENV
    (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
    memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
#endif
    memset(mnt_stat->f_mntfromname, 0, MNAMELEN);

    if (data == 0) {
	strcpy(mnt_stat->f_mntfromname, "AFS");
	/* null terminated string "AFS" will fit, just leave it be. */
	vfs_setfsprivate(mp, NULL);
    } else {
	struct VenusFid *rootFid = NULL;
	struct volume *tvp;
	char volName[MNAMELEN];

	(void)copyinstr(data, volName, MNAMELEN - 1, &size);
	memset(volName + size, 0, MNAMELEN - size);

	if (volName[0] == 0) {
	    strcpy(mnt_stat->f_mntfromname, "AFS");
	    vfs_setfsprivate(mp, &afs_rootFid);
	} else {
	    struct cell *localcell = afs_GetPrimaryCell(READ_LOCK);
	    if (localcell == NULL) {
		AFS_GUNLOCK();
		return ENODEV;
	    }

	    /* Set the volume identifier to "AFS:volume.name" */
	    snprintf(mnt_stat->f_mntfromname, MNAMELEN - 1, "AFS:%s",
		     volName);
	    tvp =
		afs_GetVolumeByName(volName, localcell->cellNum, 1,
				    (struct vrequest *)0, READ_LOCK);

	    if (tvp) {
		int volid = (tvp->roVol ? tvp->roVol : tvp->volume);
		MALLOC(rootFid, struct VenusFid *, sizeof(*rootFid), M_UFSMNT,
		       M_WAITOK);
		rootFid->Cell = localcell->cellNum;
		rootFid->Fid.Volume = volid;
		rootFid->Fid.Vnode = 1;
		rootFid->Fid.Unique = 1;
	    } else {
		AFS_GUNLOCK();
		return ENODEV;
	    }

	    vfs_setfsprivate(mp, &rootFid);
	}
    }
Пример #17
0
int
xfs_mount_common_sys(struct mount *mp,
		     const char *path,
		     void *data,
		     struct nameidata *ndp,
		     d_thread_t *p)
{
    struct vnode *devvp;
    dev_t dev;
    int error;
    struct vattr vat;

    NNPFSDEB(XDEBVFOPS, ("xfs_mount: "
		       "struct mount mp = %lx path = '%s' data = '%s'\n",
		       (unsigned long)mp, path, (char *)data));

#ifdef ARLA_KNFS
    NNPFSDEB(XDEBVFOPS, ("xfs_mount: mount flags = %x\n", mp->mnt_flag));

    /*
     * mountd(8) flushes all export entries when it starts
     * right now we ignore it (but should not)
     */

    if (mp->mnt_flag & MNT_UPDATE ||
	mp->mnt_flag & MNT_DELEXPORT) {

	NNPFSDEB(XDEBVFOPS, 
	       ("xfs_mount: ignoreing MNT_UPDATE or MNT_DELEXPORT\n"));
	return 0;
    }
#endif

    NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, data, p);
    error = namei(ndp);
    if (error) {
	NNPFSDEB(XDEBVFOPS, ("namei failed, errno = %d\n", error));
	return error;
    }

    devvp = ndp->ni_vp;

    if (devvp->v_type != VCHR) {
	vput(devvp);
	NNPFSDEB(XDEBVFOPS, ("not VCHR (%d)\n", devvp->v_type));
	return ENXIO;
    }
#if defined(__osf__)
    VOP_GETATTR(devvp, &vat, ndp->ni_cred, error);
#elif defined(HAVE_FREEBSD_THREAD)
    error = VOP_GETATTR(devvp, &vat, p->td_proc->p_ucred, p);
#else
    error = VOP_GETATTR(devvp, &vat, p->p_ucred, p);
#endif
    vput(devvp);
    if (error) {
	NNPFSDEB(XDEBVFOPS, ("VOP_GETATTR failed, error = %d\n", error));
	return error;
    }

    dev = VA_RDEV_TO_DEV(vat.va_rdev);

    NNPFSDEB(XDEBVFOPS, ("dev = %d.%d\n", major(dev), minor(dev)));

    if (!xfs_is_xfs_dev (dev)) {
	NNPFSDEB(XDEBVFOPS, ("%s is not a xfs device\n", (char *)data));
	return ENXIO;
    }

    if (xfs[minor(dev)].status & NNPFS_MOUNTED)
	return EBUSY;

    xfs[minor(dev)].status = NNPFS_MOUNTED;
    xfs[minor(dev)].mp = mp;
    xfs[minor(dev)].root = 0;
    xfs[minor(dev)].nnodes = 0;
    xfs[minor(dev)].fd = minor(dev);

    nnfs_init_head(&xfs[minor(dev)].nodehead);

    VFS_TO_NNPFS(mp) = &xfs[minor(dev)];
#if defined(HAVE_KERNEL_VFS_GETNEWFSID)
#if defined(HAVE_TWO_ARGUMENT_VFS_GETNEWFSID)
    vfs_getnewfsid(mp, MOUNT_AFS);
#else
    vfs_getnewfsid(mp);
#endif /* HAVE_TWO_ARGUMENT_VFS_GETNEWFSID */
#endif /* HAVE_KERNEL_VFS_GETNEWFSID */

    mp->mnt_stat.f_bsize = DEV_BSIZE;
#ifndef __osf__
    mp->mnt_stat.f_iosize = DEV_BSIZE;
    mp->mnt_stat.f_owner = 0;
#endif
    mp->mnt_stat.f_blocks = 4711 * 4711;
    mp->mnt_stat.f_bfree = 4711 * 4711;
    mp->mnt_stat.f_bavail = 4711 * 4711;
    mp->mnt_stat.f_files = 4711;
    mp->mnt_stat.f_ffree = 4711;
    mp->mnt_stat.f_flags = mp->mnt_flag;

#ifdef __osf__
    mp->mnt_stat.f_fsid.val[0] = dev;
    mp->mnt_stat.f_fsid.val[1] = MOUNT_NNPFS;
	
    MALLOC(mp->m_stat.f_mntonname, char *, strlen(path) + 1, 
	   M_PATHNAME, M_WAITOK);
    strcpy(mp->m_stat.f_mntonname, path);

    MALLOC(mp->m_stat.f_mntfromname, char *, sizeof("arla"),
	   M_PATHNAME, M_WAITOK);
    strcpy(mp->m_stat.f_mntfromname, "arla");
#else /* __osf__ */
    strncpy(mp->mnt_stat.f_mntonname,
	    path,
	    sizeof(mp->mnt_stat.f_mntonname));

    strncpy(mp->mnt_stat.f_mntfromname,
	    data,
	    sizeof(mp->mnt_stat.f_mntfromname));

    strncpy(mp->mnt_stat.f_fstypename,
	    "xfs",
	    sizeof(mp->mnt_stat.f_fstypename));
#endif /* __osf__ */

    return 0;
}
Пример #18
0
static errno_t
fuse_vfsop_mount(mount_t mp, __unused vnode_t devvp, user_addr_t udata,
                 vfs_context_t context)
{
    int err      = 0;
    int mntopts  = 0;
    bool mounted = false;

    uint32_t max_read = ~0;

    size_t len;

    fuse_device_t      fdev = NULL;
    struct fuse_data  *data = NULL;
    fuse_mount_args    fusefs_args;
    struct vfsstatfs  *vfsstatfsp = vfs_statfs(mp);

#if M_FUSE4X_ENABLE_BIGLOCK
    lck_mtx_t         *biglock;
#endif

    fuse_trace_printf_vfsop();

    if (vfs_isupdate(mp)) {
        return ENOTSUP;
    }

    err = copyin(udata, &fusefs_args, sizeof(fusefs_args));
    if (err) {
        return EINVAL;
    }

    /*
     * Interesting flags that we can receive from mount or may want to
     * otherwise forcibly set include:
     *
     *     MNT_ASYNC
     *     MNT_AUTOMOUNTED
     *     MNT_DEFWRITE
     *     MNT_DONTBROWSE
     *     MNT_IGNORE_OWNERSHIP
     *     MNT_JOURNALED
     *     MNT_NODEV
     *     MNT_NOEXEC
     *     MNT_NOSUID
     *     MNT_NOUSERXATTR
     *     MNT_RDONLY
     *     MNT_SYNCHRONOUS
     *     MNT_UNION
     */

    err = ENOTSUP;

#if M_FUSE4X_ENABLE_UNSUPPORTED
    vfs_setlocklocal(mp);
#endif /* M_FUSE4X_ENABLE_UNSUPPORTED */

    /** Option Processing. **/

    if (*fusefs_args.fstypename) {
        size_t typenamelen = strlen(fusefs_args.fstypename);
        if (typenamelen > FUSE_FSTYPENAME_MAXLEN) {
            return EINVAL;
        }
        snprintf(vfsstatfsp->f_fstypename, MFSTYPENAMELEN, "%s%s",
                 FUSE_FSTYPENAME_PREFIX, fusefs_args.fstypename);
    }

    if (!*fusefs_args.fsname)
        return EINVAL;

    if ((fusefs_args.daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT) ||
            (fusefs_args.daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)) {
        return EINVAL;
    }

    if ((fusefs_args.init_timeout > FUSE_MAX_INIT_TIMEOUT) ||
            (fusefs_args.init_timeout < FUSE_MIN_INIT_TIMEOUT)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_SPARSE) {
        mntopts |= FSESS_SPARSE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_CACHE) {
        mntopts |= FSESS_AUTO_CACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_AUTO_XATTR) {
        if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
            return EINVAL;
        }
        mntopts |= FSESS_AUTO_XATTR;
    } else if (fusefs_args.altflags & FUSE_MOPT_NATIVE_XATTR) {
        mntopts |= FSESS_NATIVE_XATTR;
    }

    if (fusefs_args.altflags & FUSE_MOPT_JAIL_SYMLINKS) {
        mntopts |= FSESS_JAIL_SYMLINKS;
    }

    /*
     * Note that unlike Linux, which keeps allow_root in user-space and
     * passes allow_other in that case to the kernel, we let allow_root
     * reach the kernel. The 'if' ordering is important here.
     */
    if (fusefs_args.altflags & FUSE_MOPT_ALLOW_ROOT) {
        int is_member = 0;
        if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
            log("fuse4x: caller is not a member of fuse4x admin group. "
                "Either add user (id=%d) to group (id=%d), "
                "or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
                kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
            return EPERM;
        }
        mntopts |= FSESS_ALLOW_ROOT;
    } else if (fusefs_args.altflags & FUSE_MOPT_ALLOW_OTHER) {
        if (!fuse_allow_other && !fuse_vfs_context_issuser(context)) {
            int is_member = 0;
            if ((kauth_cred_ismember_gid(kauth_cred_get(), fuse_admin_group, &is_member) != 0) || !is_member) {
                log("fuse4x: caller is not a member of fuse4x admin group. "
                    "Either add user (id=%d) to group (id=%d), "
                    "or set correct '" SYSCTL_FUSE4X_TUNABLES_ADMIN "' sysctl value.\n",
                    kauth_cred_getuid(kauth_cred_get()), fuse_admin_group);
                return EPERM;
            }
        }
        mntopts |= FSESS_ALLOW_OTHER;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEDOUBLE) {
        mntopts |= FSESS_NO_APPLEDOUBLE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_APPLEXATTR) {
        mntopts |= FSESS_NO_APPLEXATTR;
    }

    if ((fusefs_args.altflags & FUSE_MOPT_FSID) && (fusefs_args.fsid != 0)) {
        fsid_t   fsid;
        mount_t  other_mp;
        uint32_t target_dev;

        target_dev = FUSE_MAKEDEV(FUSE_CUSTOM_FSID_DEVICE_MAJOR,
                                  fusefs_args.fsid);

        fsid.val[0] = target_dev;
        fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

        other_mp = vfs_getvfs(&fsid);
        if (other_mp != NULL) {
            return EPERM;
        }

        vfsstatfsp->f_fsid.val[0] = target_dev;
        vfsstatfsp->f_fsid.val[1] = FUSE_CUSTOM_FSID_VAL1;

    } else {
        vfs_getnewfsid(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_ATTRCACHE) {
        mntopts |= FSESS_NO_ATTRCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_READAHEAD) {
        mntopts |= FSESS_NO_READAHEAD;
    }

    if (fusefs_args.altflags & (FUSE_MOPT_NO_UBC | FUSE_MOPT_DIRECT_IO)) {
        mntopts |= FSESS_NO_UBC;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_VNCACHE) {
        mntopts |= FSESS_NO_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NEGATIVE_VNCACHE) {
        if (mntopts & FSESS_NO_VNCACHE) {
            return EINVAL;
        }
        mntopts |= FSESS_NEGATIVE_VNCACHE;
    }

    if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCWRITES) {

        /* Cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'. */
        if (mntopts & (FSESS_NO_READAHEAD | FSESS_NO_UBC)) {
            log("fuse4x: cannot mix 'nosyncwrites' with 'noubc' or 'noreadahead'\n");
            return EINVAL;
        }

        mntopts |= FSESS_NO_SYNCWRITES;
        vfs_clearflags(mp, MNT_SYNCHRONOUS);
        vfs_setflags(mp, MNT_ASYNC);

        /* We check for this only if we have nosyncwrites in the first place. */
        if (fusefs_args.altflags & FUSE_MOPT_NO_SYNCONCLOSE) {
            mntopts |= FSESS_NO_SYNCONCLOSE;
        }

    } else {
        vfs_clearflags(mp, MNT_ASYNC);
        vfs_setflags(mp, MNT_SYNCHRONOUS);
    }

    if (mntopts & FSESS_NO_UBC) {
        /* If no buffer cache, disallow exec from file system. */
        vfs_setflags(mp, MNT_NOEXEC);
    }

    vfs_setauthopaque(mp);
    vfs_setauthopaqueaccess(mp);

    if ((fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) &&
            (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS)) {
        return EINVAL;
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFAULT_PERMISSIONS) {
        mntopts |= FSESS_DEFAULT_PERMISSIONS;
        vfs_clearauthopaque(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_DEFER_PERMISSIONS) {
        mntopts |= FSESS_DEFER_PERMISSIONS;
    }

    if (fusefs_args.altflags & FUSE_MOPT_EXTENDED_SECURITY) {
        mntopts |= FSESS_EXTENDED_SECURITY;
        vfs_setextendedsecurity(mp);
    }

    if (fusefs_args.altflags & FUSE_MOPT_LOCALVOL) {
        vfs_setflags(mp, MNT_LOCAL);
    }
    /* done checking incoming option bits */

    err = 0;

    vfs_setfsprivate(mp, NULL);

    fdev = fuse_device_get(fusefs_args.rdev);
    if (!fdev) {
        log("fuse4x: invalid device file (number=%d)\n", fusefs_args.rdev);
        return EINVAL;
    }

    fuse_lck_mtx_lock(fdev->mtx);

    data = fdev->data;

    if (!data) {
        fuse_lck_mtx_unlock(fdev->mtx);
        return ENXIO;
    }

#if M_FUSE4X_ENABLE_BIGLOCK
    biglock = data->biglock;
    fuse_biglock_lock(biglock);
#endif

    if (data->dataflags & FSESS_MOUNTED) {
#if M_FUSE4X_ENABLE_BIGLOCK
        fuse_biglock_unlock(biglock);
#endif
        fuse_lck_mtx_unlock(fdev->mtx);
        return EALREADY;
    }

    if (!(data->dataflags & FSESS_OPENED)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = ENXIO;
        goto out;
    }

    data->dataflags |= FSESS_MOUNTED;
    OSAddAtomic(1, (SInt32 *)&fuse_mount_count);
    mounted = true;

    if (fdata_dead_get(data)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = ENOTCONN;
        goto out;
    }

    if (!data->daemoncred) {
        panic("fuse4x: daemon found but identity unknown");
    }

    if (fuse_vfs_context_issuser(context) &&
            kauth_cred_getuid(vfs_context_ucred(context)) != kauth_cred_getuid(data->daemoncred)) {
        fuse_lck_mtx_unlock(fdev->mtx);
        err = EPERM;
        log("fuse4x: fuse daemon running by user_id=%d does not have privileges to mount on directory %s owned by user_id=%d\n",
            kauth_cred_getuid(data->daemoncred), vfsstatfsp->f_mntonname, kauth_cred_getuid(vfs_context_ucred(context)));
        goto out;
    }

    data->mp = mp;
    data->fdev = fdev;
    data->dataflags |= mntopts;

    data->daemon_timeout.tv_sec =  fusefs_args.daemon_timeout;
    data->daemon_timeout.tv_nsec = 0;
    if (data->daemon_timeout.tv_sec) {
        data->daemon_timeout_p = &(data->daemon_timeout);
    } else {
        data->daemon_timeout_p = NULL;
    }

    data->init_timeout.tv_sec = fusefs_args.init_timeout;
    data->init_timeout.tv_nsec = 0;

    data->max_read = max_read;
    data->fssubtype = fusefs_args.fssubtype;
    data->mountaltflags = fusefs_args.altflags;
    data->noimplflags = (uint64_t)0;

    data->blocksize = fuse_round_size(fusefs_args.blocksize,
                                      FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);

    data->iosize = fuse_round_size(fusefs_args.iosize,
                                   FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);

    if (data->iosize < data->blocksize) {
        data->iosize = data->blocksize;
    }

    data->userkernel_bufsize = FUSE_DEFAULT_USERKERNEL_BUFSIZE;

    copystr(fusefs_args.fsname, vfsstatfsp->f_mntfromname,
            MNAMELEN - 1, &len);
    bzero(vfsstatfsp->f_mntfromname + len, MNAMELEN - len);

    copystr(fusefs_args.volname, data->volname, MAXPATHLEN - 1, &len);
    bzero(data->volname + len, MAXPATHLEN - len);

    /* previous location of vfs_setioattr() */

    vfs_setfsprivate(mp, data);

    fuse_lck_mtx_unlock(fdev->mtx);

    /* Send a handshake message to the daemon. */
    fuse_send_init(data, context);

    struct vfs_attr vfs_attr;
    VFSATTR_INIT(&vfs_attr);
    // Our vfs_getattr() doesn't look at most *_IS_ACTIVE()'s
    err = fuse_vfsop_getattr(mp, &vfs_attr, context);
    if (!err) {
        vfsstatfsp->f_bsize  = vfs_attr.f_bsize;
        vfsstatfsp->f_iosize = vfs_attr.f_iosize;
        vfsstatfsp->f_blocks = vfs_attr.f_blocks;
        vfsstatfsp->f_bfree  = vfs_attr.f_bfree;
        vfsstatfsp->f_bavail = vfs_attr.f_bavail;
        vfsstatfsp->f_bused  = vfs_attr.f_bused;
        vfsstatfsp->f_files  = vfs_attr.f_files;
        vfsstatfsp->f_ffree  = vfs_attr.f_ffree;
        // vfsstatfsp->f_fsid already handled above
        vfsstatfsp->f_owner  = kauth_cred_getuid(data->daemoncred);
        vfsstatfsp->f_flags  = vfs_flags(mp);
        // vfsstatfsp->f_fstypename already handled above
        // vfsstatfsp->f_mntonname handled elsewhere
        // vfsstatfsp->f_mnfromname already handled above
        vfsstatfsp->f_fssubtype = data->fssubtype;
    }
    if (fusefs_args.altflags & FUSE_MOPT_BLOCKSIZE) {
        vfsstatfsp->f_bsize = data->blocksize;
    } else {
        //data->blocksize = vfsstatfsp->f_bsize;
    }
    if (fusefs_args.altflags & FUSE_MOPT_IOSIZE) {
        vfsstatfsp->f_iosize = data->iosize;
    } else {
        //data->iosize = (uint32_t)vfsstatfsp->f_iosize;
        vfsstatfsp->f_iosize = data->iosize;
    }

out:
    if (err) {
        vfs_setfsprivate(mp, NULL);

        fuse_lck_mtx_lock(fdev->mtx);
        data = fdev->data; /* again */
        if (mounted) {
            OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
        }
        if (data) {
            data->dataflags &= ~FSESS_MOUNTED;
            if (!(data->dataflags & FSESS_OPENED)) {
#if M_FUSE4X_ENABLE_BIGLOCK
                assert(biglock == data->biglock);
                fuse_biglock_unlock(biglock);
#endif
                fuse_device_close_final(fdev);
                /* data is gone now */
            }
        }
        fuse_lck_mtx_unlock(fdev->mtx);
    } else {
        vnode_t fuse_rootvp = NULLVP;
        err = fuse_vfsop_root(mp, &fuse_rootvp, context);
        if (err) {
            goto out; /* go back and follow error path */
        }
        err = vnode_ref(fuse_rootvp);
        (void)vnode_put(fuse_rootvp);
        if (err) {
            goto out; /* go back and follow error path */
        } else {
            struct vfsioattr ioattr;

            vfs_ioattr(mp, &ioattr);
            ioattr.io_devblocksize = data->blocksize;
            vfs_setioattr(mp, &ioattr);
        }
    }

#if M_FUSE4X_ENABLE_BIGLOCK
    fuse_lck_mtx_lock(fdev->mtx);
    data = fdev->data; /* ...and again */
    if(data) {
        assert(data->biglock == biglock);
        fuse_biglock_unlock(biglock);
    }
    fuse_lck_mtx_unlock(fdev->mtx);
#endif

    return err;
}
Пример #19
0
VMBlockVFSMount(struct mount *mp,        // IN: mount(2) parameters
                struct thread *td)       // IN: caller's thread context
#endif
{
   struct VMBlockMount *xmp;
   struct nameidata nd, *ndp = &nd;
   struct vnode *lowerrootvp, *vp;
   char *target;
   char *pathname;
   int len, error = 0;

   VMBLOCKDEBUG("VMBlockVFSMount(mp = %p)\n", (void *)mp);

   /*
    * TODO:  Strip out extraneous export & other misc cruft.
    */

   /*
    * Disallow the following:
    *   1.  Mounting over the system root.
    *   2.  Mount updates/remounts.  (Reconsider for rw->ro, ro->rw?)
    *   3.  Mounting VMBlock on top of a VMBlock.
    */
   if ((mp->mnt_flag & MNT_ROOTFS) ||
       (mp->mnt_flag & MNT_UPDATE) ||
       (mp->mnt_vnodecovered->v_op == &VMBlockVnodeOps)) {
      return EOPNOTSUPP;
   }

   /*
    * XXX Should only be unlocked if mnt_flag & MNT_UPDATE.
    */
   ASSERT_VOP_UNLOCKED(mp->mnt_vnodecovered, "Covered vnode already locked!");

   /*
    * Look up path to lower layer (VMBlock source / DnD staging area).
    * (E.g., in the command "mount /tmp/VMwareDnD /var/run/vmblock",
    * /tmp/VMwareDnD is the staging area.)
    */
   error = vfs_getopt(mp->mnt_optnew, "target", (void **)&target, &len);
   if (error || target[len - 1] != '\0') {
      return EINVAL;
   }

   pathname = uma_zalloc(VMBlockPathnameZone, M_WAITOK);
   if (pathname == NULL) {
      return ENOMEM;
   }

   if (strlcpy(pathname, target, MAXPATHLEN) >= MAXPATHLEN) {
      uma_zfree(VMBlockPathnameZone, pathname);
      return ENAMETOOLONG;
   }

   /*
    * Find lower node and lock if not already locked.
    */

   NDINIT(ndp, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, target, compat_td);
   error = namei(ndp);
   if (error) {
      NDFREE(ndp, 0);
      uma_zfree(VMBlockPathnameZone, pathname);
      return error;
   }
   NDFREE(ndp, NDF_ONLY_PNBUF);

   /*
    * Check multi VMBlock mount to avoid `lock against myself' panic.
    */
   lowerrootvp = ndp->ni_vp;
   if (lowerrootvp == VPTOVMB(mp->mnt_vnodecovered)->lowerVnode) {
      VMBLOCKDEBUG("VMBlockVFSMount: multi vmblock mount?\n");
      vput(lowerrootvp);
      uma_zfree(VMBlockPathnameZone, pathname);
      return EDEADLK;
   }

   xmp = malloc(sizeof *xmp, M_VMBLOCKFSMNT, M_WAITOK);

   /*
    * Record pointer (mountVFS) to the staging area's file system.  Follow up
    * by grabbing a VMBlockNode for our layer's root.
    */
   xmp->mountVFS = lowerrootvp->v_mount;
   error = VMBlockNodeGet(mp, lowerrootvp, &vp, pathname);

   /*
    * Make sure the node alias worked
    */
   if (error) {
      COMPAT_VOP_UNLOCK(vp, 0, compat_td);
      vrele(lowerrootvp);
      free(xmp, M_VMBLOCKFSMNT);   /* XXX */
      uma_zfree(VMBlockPathnameZone, pathname);
      return error;
   }

   /*
    * Record a reference to the new filesystem's root vnode & mark it as such.
    */
   xmp->rootVnode = vp;
   xmp->rootVnode->v_vflag |= VV_ROOT;

   /*
    * Unlock the node (either the lower or the alias)
    */
   COMPAT_VOP_UNLOCK(vp, 0, compat_td);

   /*
    * If the staging area is a local filesystem, reflect that here, too.  (We
    * could potentially allow NFS staging areas.)
    */
   MNT_ILOCK(mp);
   mp->mnt_flag |= lowerrootvp->v_mount->mnt_flag & MNT_LOCAL;
#if __FreeBSD_version >= 600000 && __FreeBSD_version < 1000000
   mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag & MNTK_MPSAFE;
#endif
   MNT_IUNLOCK(mp);

   mp->mnt_data = (qaddr_t) xmp;

   vfs_getnewfsid(mp);
   vfs_mountedfrom(mp, target);

   VMBLOCKDEBUG("VMBlockVFSMount: lower %s, alias at %s\n",
      mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
   return 0;
}
Пример #20
0
/*
 * Common code for mount and mountroot
 */
static int
mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
    char *hst, struct vnode **vpp, struct ucred *cred, int nametimeo,
    int negnametimeo)
{
	struct nfsmount *nmp;
	struct nfsnode *np;
	int error;
	struct vattr attrs;

	if (mp->mnt_flag & MNT_UPDATE) {
		nmp = VFSTONFS(mp);
		printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
		free(nam, M_SONAME);
		return (0);
	} else {
		nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
		bzero((caddr_t)nmp, sizeof (struct nfsmount));
		TAILQ_INIT(&nmp->nm_bufq);
		mp->mnt_data = nmp;
		nmp->nm_getinfo = nfs_getnlminfo;
		nmp->nm_vinvalbuf = nfs_vinvalbuf;
	}
	vfs_getnewfsid(mp);
	nmp->nm_mountp = mp;
	mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF);			

	/*
	 * V2 can only handle 32 bit filesizes.  A 4GB-1 limit may be too
	 * high, depending on whether we end up with negative offsets in
	 * the client or server somewhere.  2GB-1 may be safer.
	 *
	 * For V3, nfs_fsinfo will adjust this as necessary.  Assume maximum
	 * that we can handle until we find out otherwise.
	 */
	if ((argp->flags & NFSMNT_NFSV3) == 0)
		nmp->nm_maxfilesize = 0xffffffffLL;
	else
		nmp->nm_maxfilesize = OFF_MAX;

	nmp->nm_timeo = NFS_TIMEO;
	nmp->nm_retry = NFS_RETRANS;
	if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) {
		nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA;
	} else {
		nmp->nm_wsize = NFS_WSIZE;
		nmp->nm_rsize = NFS_RSIZE;
	}
	nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000);
	nmp->nm_readdirsize = NFS_READDIRSIZE;
	nmp->nm_numgrps = NFS_MAXGRPS;
	nmp->nm_readahead = NFS_DEFRAHEAD;
	nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
	nmp->nm_nametimeo = nametimeo;
	nmp->nm_negnametimeo = negnametimeo;
	nmp->nm_tprintf_delay = nfs_tprintf_delay;
	if (nmp->nm_tprintf_delay < 0)
		nmp->nm_tprintf_delay = 0;
	nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
	if (nmp->nm_tprintf_initial_delay < 0)
		nmp->nm_tprintf_initial_delay = 0;
	nmp->nm_fhsize = argp->fhsize;
	bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
	bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
	nmp->nm_nam = nam;
	/* Set up the sockets and per-host congestion */
	nmp->nm_sotype = argp->sotype;
	nmp->nm_soproto = argp->proto;
	nmp->nm_rpcops = &nfs_rpcops;

	nfs_decode_args(mp, nmp, argp, hst);

	/*
	 * For Connection based sockets (TCP,...) defer the connect until
	 * the first request, in case the server is not responding.
	 */
	if (nmp->nm_sotype == SOCK_DGRAM &&
		(error = nfs_connect(nmp)))
		goto bad;

	/*
	 * This is silly, but it has to be set so that vinifod() works.
	 * We do not want to do an nfs_statfs() here since we can get
	 * stuck on a dead server and we are holding a lock on the mount
	 * point.
	 */
	mtx_lock(&nmp->nm_mtx);
	mp->mnt_stat.f_iosize = nfs_iosize(nmp);
	mtx_unlock(&nmp->nm_mtx);
	/*
	 * A reference count is needed on the nfsnode representing the
	 * remote root.  If this object is not persistent, then backward
	 * traversals of the mount point (i.e. "..") will not work if
	 * the nfsnode gets flushed out of the cache. Ufs does not have
	 * this problem, because one can identify root inodes by their
	 * number == ROOTINO (2).
	 */
	error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
	if (error)
		goto bad;
	*vpp = NFSTOV(np);

	/*
	 * Get file attributes and transfer parameters for the
	 * mountpoint.  This has the side effect of filling in
	 * (*vpp)->v_type with the correct value.
	 */
	if (argp->flags & NFSMNT_NFSV3)
		nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread);
	else
		VOP_GETATTR(*vpp, &attrs, curthread->td_ucred);

	/*
	 * Lose the lock but keep the ref.
	 */
	VOP_UNLOCK(*vpp, 0);

	return (0);
bad:
	nfs_disconnect(nmp);
	mtx_destroy(&nmp->nm_mtx);
	uma_zfree(nfsmount_zone, nmp);
	free(nam, M_SONAME);
	return (error);
}
Пример #21
0
/*
 * Mount umap layer
 */
int
umapfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
	struct lwp *l = curlwp;
	struct pathbuf *pb;
	struct nameidata nd;
	struct umap_args *args = data;
	struct vnode *lowerrootvp, *vp;
	struct umap_mount *amp;
	int error;
#ifdef UMAPFS_DIAGNOSTIC
	int i;
#endif

	if (args == NULL)
		return EINVAL;
	if (*data_len < sizeof *args)
		return EINVAL;

	if (mp->mnt_flag & MNT_GETARGS) {
		amp = MOUNTTOUMAPMOUNT(mp);
		if (amp == NULL)
			return EIO;
		args->la.target = NULL;
		args->nentries = amp->info_nentries;
		args->gnentries = amp->info_gnentries;
		*data_len = sizeof *args;
		return 0;
	}

	/* only for root */
	error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
	    KAUTH_REQ_SYSTEM_MOUNT_UMAP, NULL, NULL, NULL);
	if (error)
		return error;

#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_mount(mp = %p)\n", mp);
#endif

	/*
	 * Update is not supported
	 */
	if (mp->mnt_flag & MNT_UPDATE)
		return EOPNOTSUPP;

	/*
	 * Find lower node
	 */
	error = pathbuf_copyin(args->umap_target, &pb);
	if (error) {
		return error;
	}
	NDINIT(&nd, LOOKUP, FOLLOW|LOCKLEAF, pb);
	if ((error = namei(&nd)) != 0) {
		pathbuf_destroy(pb);
		return error;
	}

	/*
	 * Sanity check on lower vnode
	 */
	lowerrootvp = nd.ni_vp;
	pathbuf_destroy(pb);
#ifdef UMAPFS_DIAGNOSTIC
	printf("vp = %p, check for VDIR...\n", lowerrootvp);
#endif

	if (lowerrootvp->v_type != VDIR) {
		vput(lowerrootvp);
		return (EINVAL);
	}

#ifdef UMAPFS_DIAGNOSTIC
	printf("mp = %p\n", mp);
#endif

	amp = kmem_zalloc(sizeof(struct umap_mount), KM_SLEEP);
	mp->mnt_data = amp;
	amp->umapm_vfs = lowerrootvp->v_mount;
	if (amp->umapm_vfs->mnt_flag & MNT_LOCAL)
		mp->mnt_flag |= MNT_LOCAL;

	/*
	 * Now copy in the number of entries and maps for umap mapping.
	 */
	if (args->nentries > MAPFILEENTRIES || args->gnentries > GMAPFILEENTRIES) {
		vput(lowerrootvp);
		return (error);
	}

	amp->info_nentries = args->nentries;
	amp->info_gnentries = args->gnentries;
	error = copyin(args->mapdata, amp->info_mapdata,
	    2*sizeof(u_long)*args->nentries);
	if (error) {
		vput(lowerrootvp);
		return (error);
	}

#ifdef UMAPFS_DIAGNOSTIC
	printf("umap_mount:nentries %d\n",args->nentries);
	for (i = 0; i < args->nentries; i++)
		printf("   %ld maps to %ld\n", amp->info_mapdata[i][0],
	 	    amp->info_mapdata[i][1]);
#endif

	error = copyin(args->gmapdata, amp->info_gmapdata,
	    2*sizeof(u_long)*args->gnentries);
	if (error) {
		vput(lowerrootvp);
		return (error);
	}

#ifdef UMAPFS_DIAGNOSTIC
	printf("umap_mount:gnentries %d\n",args->gnentries);
	for (i = 0; i < args->gnentries; i++)
		printf("\tgroup %ld maps to %ld\n",
		    amp->info_gmapdata[i][0],
	 	    amp->info_gmapdata[i][1]);
#endif

	/*
	 * Make sure the mount point's sufficiently initialized
	 * that the node create call will work.
	 */
	vfs_getnewfsid(mp);
	amp->umapm_size = sizeof(struct umap_node);
	amp->umapm_tag = VT_UMAP;
	amp->umapm_bypass = umap_bypass;
	amp->umapm_vnodeop_p = umap_vnodeop_p;

	/*
	 * fix up umap node for root vnode.
	 */
	VOP_UNLOCK(lowerrootvp);
	error = layer_node_create(mp, lowerrootvp, &vp);
	/*
	 * Make sure the node alias worked
	 */
	if (error) {
		vrele(lowerrootvp);
		kmem_free(amp, sizeof(struct umap_mount));
		return error;
	}

	/*
	 * Keep a held reference to the root vnode.
	 * It is vrele'd in umapfs_unmount.
	 */
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
	vp->v_vflag |= VV_ROOT;
	amp->umapm_rootvp = vp;
	VOP_UNLOCK(vp);

	error = set_statvfs_info(path, UIO_USERSPACE, args->umap_target,
	    UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_mount: lower %s, alias at %s\n",
		mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
#endif
	return error;
}
static int vboxvfs_mount(struct mount *mp, struct thread *td)
{
    int rc;
    char *pszShare;
    int  cbShare, cbOption;
    int uid = 0, gid = 0;
    struct sf_glob_info *pShFlGlobalInfo;
    SHFLSTRING *pShFlShareName = NULL;
    int cbShFlShareName;

    printf("%s: Enter\n", __FUNCTION__);

    if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
        return EOPNOTSUPP;

    if (vfs_filteropt(mp->mnt_optnew, vboxvfs_opts))
    {
        vfs_mount_error(mp, "%s", "Invalid option");
        return EINVAL;
    }

    rc = vfs_getopt(mp->mnt_optnew, "from", (void **)&pszShare, &cbShare);
    if (rc || pszShare[cbShare-1] != '\0' || cbShare > 0xfffe)
        return EINVAL;

    rc = vfs_getopt(mp->mnt_optnew, "gid", (void **)&gid, &cbOption);
    if ((rc != ENOENT) && (rc || cbOption != sizeof(gid)))
        return EINVAL;

    rc = vfs_getopt(mp->mnt_optnew, "uid", (void **)&uid, &cbOption);
    if ((rc != ENOENT) && (rc || cbOption != sizeof(uid)))
        return EINVAL;

    pShFlGlobalInfo = RTMemAllocZ(sizeof(struct sf_glob_info));
    if (!pShFlGlobalInfo)
        return ENOMEM;

    cbShFlShareName = offsetof (SHFLSTRING, String.utf8) + cbShare + 1;
    pShFlShareName  = RTMemAllocZ(cbShFlShareName);
    if (!pShFlShareName)
        return VERR_NO_MEMORY;

    pShFlShareName->u16Length = cbShare;
    pShFlShareName->u16Size   = cbShare + 1;
    memcpy (pShFlShareName->String.utf8, pszShare, cbShare + 1);

    rc = VbglR0SfMapFolder (&g_vboxSFClient, pShFlShareName, &pShFlGlobalInfo->map);
    RTMemFree(pShFlShareName);

    if (RT_FAILURE (rc))
    {
        RTMemFree(pShFlGlobalInfo);
        printf("VbglR0SfMapFolder failed rc=%d\n", rc);
        return EPROTO;
    }

    pShFlGlobalInfo->uid = uid;
    pShFlGlobalInfo->gid = gid;

    mp->mnt_data = pShFlGlobalInfo;

    /** @todo root vnode. */

    vfs_getnewfsid(mp);
    vfs_mountedfrom(mp, pszShare);

    printf("%s: Leave rc=0\n", __FUNCTION__);

    return 0;
}
Пример #23
0
static int
fuse_vfsop_mount(struct mount *mp)
{
	int err;

	uint64_t mntopts, __mntopts;
	int max_read_set;
	uint32_t max_read;
	int daemon_timeout;
	int fd;

	size_t len;

	struct cdev *fdev;
	struct fuse_data *data;
	struct thread *td;
	struct file *fp, *fptmp;
	char *fspec, *subtype;
	struct vfsoptlist *opts;

	subtype = NULL;
	max_read_set = 0;
	max_read = ~0;
	err = 0;
	mntopts = 0;
	__mntopts = 0;
	td = curthread;

	fuse_trace_printf_vfsop();

	if (mp->mnt_flag & MNT_UPDATE)
		return EOPNOTSUPP;

	mp->mnt_flag |= MNT_SYNCHRONOUS;
	mp->mnt_data = NULL;
	/* Get the new options passed to mount */
	opts = mp->mnt_optnew;

	if (!opts)
		return EINVAL;

	/* `fspath' contains the mount point (eg. /mnt/fuse/sshfs); REQUIRED */
	if (!vfs_getopts(opts, "fspath", &err))
		return err;

	/* `from' contains the device name (eg. /dev/fuse0); REQUIRED */
	fspec = vfs_getopts(opts, "from", &err);
	if (!fspec)
		return err;

	/* `fd' contains the filedescriptor for this session; REQUIRED */
	if (vfs_scanopt(opts, "fd", "%d", &fd) != 1)
		return EINVAL;

	err = fuse_getdevice(fspec, td, &fdev);
	if (err != 0)
		return err;

	/*
         * With the help of underscored options the mount program
         * can inform us from the flags it sets by default
         */
	FUSE_FLAGOPT(allow_other, FSESS_DAEMON_CAN_SPY);
	FUSE_FLAGOPT(push_symlinks_in, FSESS_PUSH_SYMLINKS_IN);
	FUSE_FLAGOPT(default_permissions, FSESS_DEFAULT_PERMISSIONS);
	FUSE_FLAGOPT(no_attrcache, FSESS_NO_ATTRCACHE);
	FUSE_FLAGOPT(no_readahed, FSESS_NO_READAHEAD);
	FUSE_FLAGOPT(no_datacache, FSESS_NO_DATACACHE);
	FUSE_FLAGOPT(no_namecache, FSESS_NO_NAMECACHE);
	FUSE_FLAGOPT(no_mmap, FSESS_NO_MMAP);
	FUSE_FLAGOPT(brokenio, FSESS_BROKENIO);

	if (vfs_scanopt(opts, "max_read=", "%u", &max_read) == 1)
		max_read_set = 1;
	if (vfs_scanopt(opts, "timeout=", "%u", &daemon_timeout) == 1) {
		if (daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)
			daemon_timeout = FUSE_MIN_DAEMON_TIMEOUT;
		else if (daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT)
			daemon_timeout = FUSE_MAX_DAEMON_TIMEOUT;
	} else {
		daemon_timeout = FUSE_DEFAULT_DAEMON_TIMEOUT;
	}
	subtype = vfs_getopts(opts, "subtype=", &err);

	FS_DEBUG2G("mntopts 0x%jx\n", (uintmax_t)mntopts);

	err = fget(td, fd, CAP_READ, &fp);
	if (err != 0) {
		FS_DEBUG("invalid or not opened device: data=%p\n", data);
		goto out;
	}
	fptmp = td->td_fpop;
	td->td_fpop = fp;
        err = devfs_get_cdevpriv((void **)&data);
	td->td_fpop = fptmp;
	fdrop(fp, td);
	FUSE_LOCK();
	if (err != 0 || data == NULL || data->mp != NULL) {
		FS_DEBUG("invalid or not opened device: data=%p data.mp=%p\n",
		    data, data != NULL ? data->mp : NULL);
		err = ENXIO;
		FUSE_UNLOCK();
		goto out;
	}
	if (fdata_get_dead(data)) {
		FS_DEBUG("device is dead during mount: data=%p\n", data);
		err = ENOTCONN;
		FUSE_UNLOCK();
		goto out;
	}
	/* Sanity + permission checks */
	if (!data->daemoncred)
		panic("fuse daemon found, but identity unknown");
	if (mntopts & FSESS_DAEMON_CAN_SPY)
		err = priv_check(td, PRIV_VFS_FUSE_ALLOWOTHER);
	if (err == 0 && td->td_ucred->cr_uid != data->daemoncred->cr_uid)
		/* are we allowed to do the first mount? */
		err = priv_check(td, PRIV_VFS_FUSE_MOUNT_NONUSER);
	if (err) {
		FUSE_UNLOCK();
		goto out;
	}
	/* We need this here as this slot is used by getnewvnode() */
	mp->mnt_stat.f_iosize = PAGE_SIZE;
	mp->mnt_data = data;
	data->ref++;
	data->mp = mp;
	data->dataflags |= mntopts;
	data->max_read = max_read;
	data->daemon_timeout = daemon_timeout;
#ifdef XXXIP
	if (!priv_check(td, PRIV_VFS_FUSE_SYNC_UNMOUNT))
		data->dataflags |= FSESS_CAN_SYNC_UNMOUNT;
#endif
	FUSE_UNLOCK();

	vfs_getnewfsid(mp);
	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_kern_flag |= MNTK_MPSAFE;
	if (subtype) {
		strlcat(mp->mnt_stat.f_fstypename, ".", MFSNAMELEN);
		strlcat(mp->mnt_stat.f_fstypename, subtype, MFSNAMELEN);
	}
	copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &len);
	bzero(mp->mnt_stat.f_mntfromname + len, MNAMELEN - len);
	FS_DEBUG2G("mp %p: %s\n", mp, mp->mnt_stat.f_mntfromname);

	/* Now handshaking with daemon */
	fuse_internal_send_init(data, td);

out:
	if (err) {
		FUSE_LOCK();
		if (data->mp == mp) {
			/*
			 * Destroy device only if we acquired reference to
			 * it
			 */
			FS_DEBUG("mount failed, destroy device: data=%p mp=%p"
			      " err=%d\n",
			    data, mp, err);
			data->mp = NULL;
			fdata_trydestroy(data);
		}
		FUSE_UNLOCK();
		dev_rel(fdev);
	}
	return err;
}
Пример #24
0
/*
 * mp - path - addr in user space of mount point (ie /usr or whatever)
 * data - addr in user space of mount params 
 */
static int nwfs_mount(struct mount *mp)
{
	struct nwfs_args args; 	  /* will hold data from mount request */
	int error;
	struct nwmount *nmp = NULL;
	struct ncp_conn *conn = NULL;
	struct ncp_handle *handle = NULL;
	struct vnode *vp;
	struct thread *td;
	char *pc,*pe;

	td = curthread;
	if (mp->mnt_flag & MNT_ROOTFS)
		return (EOPNOTSUPP);
	if (mp->mnt_flag & MNT_UPDATE) {
		nwfs_printf("MNT_UPDATE not implemented");
		return (EOPNOTSUPP);
	}
	error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args);
	if (error)
		return (error);
	if (args.version != NWFS_VERSION) {
		nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
		return (1);
	}
	error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn);
	if (error) {
		nwfs_printf("invalid connection refernce %d\n",args.connRef);
		return (error);
	}
	error = ncp_conn_gethandle(conn, NULL, &handle);
	if (error) {
		nwfs_printf("can't get connection handle\n");
		return (error);
	}
	ncp_conn_unlock(conn, td);	/* we keep the ref */
	mp->mnt_stat.f_iosize = conn->buffer_size;
        /* We must malloc our own mount info */
        nmp = malloc(sizeof(struct nwmount),M_NWFSDATA,
	    M_WAITOK | M_USE_RESERVE | M_ZERO);
        if (nmp == NULL) {
                nwfs_printf("could not alloc nwmount\n");
                error = ENOMEM;
		goto bad;
        }
        mp->mnt_data = nmp;
	nmp->connh = handle;
	nmp->n_root = NULL;
	nmp->n_id = nwfsid++;
        nmp->m = args;
	nmp->m.file_mode = (nmp->m.file_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
	nmp->m.dir_mode  = (nmp->m.dir_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
	if ((error = nwfs_initnls(nmp)) != 0) goto bad;
	pc = mp->mnt_stat.f_mntfromname;
	pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
	bzero(pc, MNAMELEN);
	*(pc++) = '/';
	pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
	if (pc < pe-1) {
		*(pc++) = ':';
		pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
		if (pc < pe-1) {
			*(pc++) = '/';
			strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
		}
	}
	/* protect against invalid mount points */
	nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
	vfs_getnewfsid(mp);
	error = nwfs_root(mp, LK_EXCLUSIVE, &vp);
	if (error)
		goto bad;
	/*
	 * Lose the lock but keep the ref.
	 */
	VOP_UNLOCK(vp, 0);
	NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp));
	return error;
bad:
        if (nmp)
		free(nmp, M_NWFSDATA);
	if (handle)
		ncp_conn_puthandle(handle, NULL, 0);
        return error;
}
Пример #25
0
/*
 * Mount null layer
 */
static int
nullfs_mount(struct mount *mp)
{
	int error = 0;
	struct vnode *lowerrootvp, *vp;
	struct vnode *nullm_rootvp;
	struct null_mount *xmp;
	struct thread *td = curthread;
	char *target;
	int isvnunlocked = 0, len;
	struct nameidata nd, *ndp = &nd;

	NULLFSDEBUG("nullfs_mount(mp = %p)\n", (void *)mp);

	if (!prison_allow(td->td_ucred, PR_ALLOW_MOUNT_NULLFS))
		return (EPERM);
	if (mp->mnt_flag & MNT_ROOTFS)
		return (EOPNOTSUPP);

	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE) {
		/*
		 * Only support update mounts for NFS export.
		 */
		if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
			return (0);
		else
			return (EOPNOTSUPP);
	}

	/*
	 * Get argument
	 */
	error = vfs_getopt(mp->mnt_optnew, "target", (void **)&target, &len);
	if (error || target[len - 1] != '\0')
		return (EINVAL);

	/*
	 * Unlock lower node to avoid possible deadlock.
	 */
	if ((mp->mnt_vnodecovered->v_op == &null_vnodeops) &&
	    VOP_ISLOCKED(mp->mnt_vnodecovered) == LK_EXCLUSIVE) {
		VOP_UNLOCK(mp->mnt_vnodecovered, 0);
		isvnunlocked = 1;
	}
	/*
	 * Find lower node
	 */
	NDINIT(ndp, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, target, curthread);
	error = namei(ndp);

	/*
	 * Re-lock vnode.
	 * XXXKIB This is deadlock-prone as well.
	 */
	if (isvnunlocked)
		vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY);

	if (error)
		return (error);
	NDFREE(ndp, NDF_ONLY_PNBUF);

	/*
	 * Sanity check on lower vnode
	 */
	lowerrootvp = ndp->ni_vp;

	/*
	 * 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 | M_ZERO);

	/*
	 * 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_nodeget(mp, lowerrootvp, &vp);
	/*
	 * Make sure the node alias worked
	 */
	if (error) {
		free(xmp, M_NULLFSMNT);
		return (error);
	}

	/*
	 * Keep a held reference to the root vnode.
	 * It is vrele'd in nullfs_unmount.
	 */
	nullm_rootvp = vp;
	nullm_rootvp->v_vflag |= VV_ROOT;
	xmp->nullm_rootvp = nullm_rootvp;

	/*
	 * Unlock the node (either the lower or the alias)
	 */
	VOP_UNLOCK(vp, 0);

	if (NULLVPTOLOWERVP(nullm_rootvp)->v_mount->mnt_flag & MNT_LOCAL) {
		MNT_ILOCK(mp);
		mp->mnt_flag |= MNT_LOCAL;
		MNT_IUNLOCK(mp);
	}

	xmp->nullm_flags |= NULLM_CACHE;
	if (vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0)
		xmp->nullm_flags &= ~NULLM_CACHE;

	MNT_ILOCK(mp);
	if ((xmp->nullm_flags & NULLM_CACHE) != 0) {
		mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &
		    (MNTK_SHARED_WRITES | MNTK_LOOKUP_SHARED |
		    MNTK_EXTENDED_SHARED);
	}
	mp->mnt_kern_flag |= MNTK_LOOKUP_EXCL_DOTDOT;
	MNT_IUNLOCK(mp);
	mp->mnt_data = xmp;
	vfs_getnewfsid(mp);
	if ((xmp->nullm_flags & NULLM_CACHE) != 0) {
		MNT_ILOCK(xmp->nullm_vfs);
		TAILQ_INSERT_TAIL(&xmp->nullm_vfs->mnt_uppers, mp,
		    mnt_upper_link);
		MNT_IUNLOCK(xmp->nullm_vfs);
	}

	vfs_mountedfrom(mp, target);

	NULLFSDEBUG("nullfs_mount: lower %s, alias at %s\n",
		mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
	return (0);
}
Пример #26
0
/*
 * VFS Operations.
 *
 * mount system call
 */
static int
devfs_vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
{
	struct devfs_mount_info info;
	struct devfs_mnt_data *mnt;
	size_t size;
	int error;

	devfs_debug(DEVFS_DEBUG_DEBUG, "(vfsops) devfs_mount() called!\n");

	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	if (data == NULL) {
		bzero(&info, sizeof(info));
	} else {
		if ((error = copyin(data, &info, sizeof(info))) != 0)
			return (error);
	}

	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_kern_flag |= MNTK_NOSTKMNT | MNTK_ALL_MPSAFE;
	mp->mnt_data = NULL;
	vfs_getnewfsid(mp);

	size = sizeof("devfs") - 1;
	bcopy("devfs", mp->mnt_stat.f_mntfromname, size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	copyinstr(path, mp->mnt_stat.f_mntonname,
	    sizeof(mp->mnt_stat.f_mntonname) -1, &size);
	devfs_vfs_statfs(mp, &mp->mnt_stat, cred);

	/*
	 * XXX: save other mount info passed from userland or so.
	 */
	mnt = kmalloc(sizeof(*mnt), M_DEVFS, M_WAITOK | M_ZERO);

	lockmgr(&devfs_lock, LK_EXCLUSIVE);
	mp->mnt_data = (qaddr_t)mnt;

	if (info.flags & DEVFS_MNT_JAIL)
		mnt->jailed = 1;
	else
		mnt->jailed = jailed(cred);

	mnt->leak_count = 0;
	mnt->file_count = 0;
	mnt->mp = mp;
	TAILQ_INIT(&mnt->orphan_list);
	mnt->root_node = devfs_allocp(Nroot, "", NULL, mp, NULL);
	KKASSERT(mnt->root_node);
	lockmgr(&devfs_lock, LK_RELEASE);

	vfs_add_vnodeops(mp, &devfs_vnode_norm_vops, &mp->mnt_vn_norm_ops);
	vfs_add_vnodeops(mp, &devfs_vnode_dev_vops, &mp->mnt_vn_spec_ops);

	devfs_debug(DEVFS_DEBUG_DEBUG, "calling devfs_mount_add\n");
	devfs_mount_add(mnt);

	return (0);
}
Пример #27
0
int
hfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l,
    const char *devpath)
{
	hfs_callback_args cbargs;
	hfs_libcb_argsopen argsopen;
	hfs_libcb_argsread argsread;
	struct hfsmount *hmp;
	kauth_cred_t cred;
	int error;
	
	cred = l ? l->l_cred : NOCRED;
	error = 0;
	hmp = NULL;

	/* Create mounted volume structure. */
	hmp = (struct hfsmount*)malloc(sizeof(struct hfsmount),
            M_HFSMNT, M_WAITOK);
	if (hmp == NULL) {
		error = ENOMEM;
		goto error;
	}
	memset(hmp, 0, sizeof(struct hfsmount));
	
	mp->mnt_data = hmp;
	mp->mnt_flag |= MNT_LOCAL;
	vfs_getnewfsid(mp);

	hmp->hm_mountp = mp;
	hmp->hm_dev = devvp->v_rdev;
	hmp->hm_devvp = devvp;
	
	/*
	 * Use libhfs to open the volume and read the volume header and other
	 * useful information.
	 */
	 
	hfslib_init_cbargs(&cbargs);
	argsopen.cred = argsread.cred = cred;
	argsopen.l = argsread.l = l;
	argsopen.devvp = devvp;
	cbargs.read = (void*)&argsread;
	cbargs.openvol = (void*)&argsopen;

	if ((error = hfslib_open_volume(devpath, mp->mnt_flag & MNT_RDONLY,
		&hmp->hm_vol, &cbargs)) != 0)
		goto error;
		
	/* Make sure this is not a journaled volume whose journal is dirty. */
	if (!hfslib_is_journal_clean(&hmp->hm_vol)) {
		printf("volume journal is dirty; not mounting\n");
		error = EIO;
		goto error;
	}

	mp->mnt_fs_bshift = 0;
        while ((1 << mp->mnt_fs_bshift) < hmp->hm_vol.vh.block_size)
		mp->mnt_fs_bshift++;
	mp->mnt_dev_bshift = DEV_BSHIFT;

	return 0;
	
error:
	if (hmp != NULL)
		free(hmp, M_HFSMNT);
		
	return error;
}
Пример #28
0
/*
 * mp - path - addr in user space of mount point (ie /usr or whatever)
 * data - addr in user space of mount params 
 */
static int
nwfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
{
	struct nwfs_args args; 	  /* will hold data from mount request */
	int error;
	struct nwmount *nmp = NULL;
	struct ncp_conn *conn = NULL;
	struct ncp_handle *handle = NULL;
	struct vnode *vp;
	char *pc,*pe;

	if (data == NULL) {
		nwfs_printf("missing data argument\n");
		return 1;
	}
	if (mp->mnt_flag & MNT_UPDATE) {
		nwfs_printf("MNT_UPDATE not implemented");
		return (EOPNOTSUPP);
	}
	error = copyin(data, (caddr_t)&args, sizeof(struct nwfs_args));
	if (error)
		return (error);
	if (args.version != NWFS_VERSION) {
		nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
		return (1);
	}
	error = ncp_conn_getbyref(args.connRef,curthread,cred,NCPM_EXECUTE,&conn);
	if (error) {
		nwfs_printf("invalid connection reference %d\n",args.connRef);
		return (error);
	}
	error = ncp_conn_gethandle(conn, NULL, &handle);
	if (error) {
		nwfs_printf("can't get connection handle\n");
		return (error);
	}
	ncp_conn_unlock(conn,curthread);	/* we keep the ref */
	mp->mnt_stat.f_iosize = conn->buffer_size;
        /* We must malloc our own mount info */
        nmp = kmalloc(sizeof(struct nwmount), M_NWFSDATA,
		      M_WAITOK | M_USE_RESERVE | M_ZERO);
        mp->mnt_data = (qaddr_t)nmp;
	nmp->connh = handle;
	nmp->n_root = NULL;
	nmp->n_id = nwfsid++;
        nmp->m = args;
	nmp->m.file_mode = (nmp->m.file_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
	nmp->m.dir_mode  = (nmp->m.dir_mode &
			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
	if ((error = nwfs_initnls(nmp)) != 0) goto bad;
	pc = mp->mnt_stat.f_mntfromname;
	pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
	bzero(pc, MNAMELEN);
	*(pc++) = '/';
	pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
	if (pc < pe-1) {
		*(pc++) = ':';
		pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
		if (pc < pe-1) {
			*(pc++) = '/';
			strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
		}
	}
	/* protect against invalid mount points */
	nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';

	vfs_add_vnodeops(mp, &nwfs_vnode_vops, &mp->mnt_vn_norm_ops);

	vfs_getnewfsid(mp);
	error = nwfs_root(mp, &vp);
	if (error)
		goto bad;
	/*
	 * Lose the lock but keep the ref.
	 */
	vn_unlock(vp);
	NCPVODEBUG("rootvp.vrefcnt=%d\n",vp->v_sysref.refcnt);
	return error;
bad:
        if (nmp)
		kfree(nmp, M_NWFSDATA);
	if (handle)
		ncp_conn_puthandle(handle, NULL, 0);
        return error;
}
Пример #29
0
/*
 * Mount union filesystem
 */
int
union_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
	struct lwp *l = curlwp;
	int error = 0;
	struct union_args *args = data;
	struct vnode *lowerrootvp = NULLVP;
	struct vnode *upperrootvp = NULLVP;
	struct union_mount *um = 0;
	const char *cp;
	char *xp;
	int len;
	size_t size;

	if (*data_len < sizeof *args)
		return EINVAL;

#ifdef UNION_DIAGNOSTIC
	printf("union_mount(mp = %p)\n", mp);
#endif

	if (mp->mnt_flag & MNT_GETARGS) {
		um = MOUNTTOUNIONMOUNT(mp);
		if (um == NULL)
			return EIO;
		args->target = NULL;
		args->mntflags = um->um_op;
		*data_len = sizeof *args;
		return 0;
	}
	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE) {
		/*
		 * Need to provide.
		 * 1. a way to convert between rdonly and rdwr mounts.
		 * 2. support for nfs exports.
		 */
		error = EOPNOTSUPP;
		goto bad;
	}

	lowerrootvp = mp->mnt_vnodecovered;
	vref(lowerrootvp);

	/*
	 * Find upper node.
	 */
	error = namei_simple_user(args->target,
				NSM_FOLLOW_NOEMULROOT, &upperrootvp);
	if (error != 0)
		goto bad;

	if (upperrootvp->v_type != VDIR) {
		error = EINVAL;
		goto bad;
	}

	um = kmem_zalloc(sizeof(struct union_mount), KM_SLEEP);

	/*
	 * Keep a held reference to the target vnodes.
	 * They are vrele'd in union_unmount.
	 *
	 * Depending on the _BELOW flag, the filesystems are
	 * viewed in a different order.  In effect, this is the
	 * same as providing a mount under option to the mount syscall.
	 */

	um->um_op = args->mntflags & UNMNT_OPMASK;
	switch (um->um_op) {
	case UNMNT_ABOVE:
		um->um_lowervp = lowerrootvp;
		um->um_uppervp = upperrootvp;
		break;

	case UNMNT_BELOW:
		um->um_lowervp = upperrootvp;
		um->um_uppervp = lowerrootvp;
		break;

	case UNMNT_REPLACE:
		vrele(lowerrootvp);
		lowerrootvp = NULLVP;
		um->um_uppervp = upperrootvp;
		um->um_lowervp = lowerrootvp;
		break;

	default:
		error = EINVAL;
		goto bad;
	}

	mp->mnt_iflag |= IMNT_MPSAFE;

	/*
	 * Unless the mount is readonly, ensure that the top layer
	 * supports whiteout operations
	 */
	if ((mp->mnt_flag & MNT_RDONLY) == 0) {
		vn_lock(um->um_uppervp, LK_EXCLUSIVE | LK_RETRY);
		error = VOP_WHITEOUT(um->um_uppervp,
		    (struct componentname *) 0, LOOKUP);
		VOP_UNLOCK(um->um_uppervp);
		if (error)
			goto bad;
	}

	um->um_cred = l->l_cred;
	kauth_cred_hold(um->um_cred);
	um->um_cmode = UN_DIRMODE &~ l->l_proc->p_cwdi->cwdi_cmask;

	/*
	 * Depending on what you think the MNT_LOCAL flag might mean,
	 * you may want the && to be || on the conditional below.
	 * At the moment it has been defined that the filesystem is
	 * only local if it is all local, ie the MNT_LOCAL flag implies
	 * that the entire namespace is local.  If you think the MNT_LOCAL
	 * flag implies that some of the files might be stored locally
	 * then you will want to change the conditional.
	 */
	if (um->um_op == UNMNT_ABOVE) {
		if (((um->um_lowervp == NULLVP) ||
		     (um->um_lowervp->v_mount->mnt_flag & MNT_LOCAL)) &&
		    (um->um_uppervp->v_mount->mnt_flag & MNT_LOCAL))
			mp->mnt_flag |= MNT_LOCAL;
	}

	/*
	 * Copy in the upper layer's RDONLY flag.  This is for the benefit
	 * of lookup() which explicitly checks the flag, rather than asking
	 * the filesystem for it's own opinion.  This means, that an update
	 * mount of the underlying filesystem to go from rdonly to rdwr
	 * will leave the unioned view as read-only.
	 */
	mp->mnt_flag |= (um->um_uppervp->v_mount->mnt_flag & MNT_RDONLY);

	mp->mnt_data = um;
	vfs_getnewfsid(mp);

	error = set_statvfs_info( path, UIO_USERSPACE, NULL, UIO_USERSPACE,
	    mp->mnt_op->vfs_name, mp, l);
	if (error)
		goto bad;

	switch (um->um_op) {
	case UNMNT_ABOVE:
		cp = "<above>:";
		break;
	case UNMNT_BELOW:
		cp = "<below>:";
		break;
	case UNMNT_REPLACE:
		cp = "";
		break;
	default:
		cp = "<invalid>:";
#ifdef DIAGNOSTIC
		panic("union_mount: bad um_op");
#endif
		break;
	}
	len = strlen(cp);
	memcpy(mp->mnt_stat.f_mntfromname, cp, len);

	xp = mp->mnt_stat.f_mntfromname + len;
	len = MNAMELEN - len;

	(void) copyinstr(args->target, xp, len - 1, &size);
	memset(xp + size, 0, len - size);

#ifdef UNION_DIAGNOSTIC
	printf("union_mount: from %s, on %s\n",
	    mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
#endif

	/* Setup the readdir hook if it's not set already */
	if (!vn_union_readdir_hook)
		vn_union_readdir_hook = union_readdirhook;

	return (0);

bad:
	if (um)
		kmem_free(um, sizeof(struct union_mount));
	if (upperrootvp)
		vrele(upperrootvp);
	if (lowerrootvp)
		vrele(lowerrootvp);
	return (error);
}
Пример #30
0
static int
dirfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
{
	dirfs_mount_t dmp;
	struct stat st;
	size_t done, nlen;
	int error;

	dbg(1, "called\n");

	if (mp->mnt_flag & MNT_UPDATE) {
		dmp = VFS_TO_DIRFS(mp);
		if (dmp->dm_rdonly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
			/* XXX We should make sure all writes are synced */
			dmp->dm_rdonly = 1;
			debug(2, "dirfs read-write -> read-only\n");
		}

		if (dmp->dm_rdonly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
			debug(2, "dirfs read-only -> read-write\n");
			dmp->dm_rdonly = 0;
		}
		return 0;
	}

	dmp = kmalloc(sizeof(*dmp), M_DIRFS, M_WAITOK | M_ZERO);
	mp->mnt_data = (qaddr_t)dmp;
	dmp->dm_mount = mp;

	error = copyinstr(data, &dmp->dm_path, MAXPATHLEN, &done);
	if (error) {
		/* Attempt to copy from kernel address */
		error = copystr(data, &dmp->dm_path, MAXPATHLEN, &done);
		if (error) {
			kfree(dmp, M_DIRFS);
			goto failure;
		}
	}

	/* Strip / character at the end to avoid problems */
	nlen = strnlen(dmp->dm_path, MAXPATHLEN);
	if (dmp->dm_path[nlen-1] == '/')
		dmp->dm_path[nlen-1] = 0;

	/* Make sure host directory exists and it is indeed a directory. */
	if ((stat(dmp->dm_path, &st)) == 0) {
		if (!S_ISDIR(st.st_mode)) {
			kfree(dmp, M_DIRFS);
			error = EINVAL;
			goto failure;
		}
	} else {
		error = errno;
		goto failure;
	}

	lockinit(&dmp->dm_lock, "dfsmnt", 0, LK_CANRECURSE);

	vfs_add_vnodeops(mp, &dirfs_vnode_vops, &mp->mnt_vn_norm_ops);
	vfs_getnewfsid(mp);

	/* Who is running the vkernel */
	dmp->dm_uid = getuid();
	dmp->dm_gid = getgid();

	TAILQ_INIT(&dmp->dm_fdlist);
	RB_INIT(&dmp->dm_inotree);

	kmalloc_raise_limit(M_DIRFS_NODE, 0);

	dirfs_statfs(mp, &mp->mnt_stat, cred);

failure:
	KTR_LOG(dirfs_mount, (dmp->dm_path) ? dmp->dm_path : "NULL",
	    dmp, mp, error);

	return error;
}