예제 #1
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)););
예제 #2
0
/*ARGSUSED*/
int
coda_mount(struct mount *vfsp,	/* Allocated and initialized by mount(2) */
    const char *path,	/* path covered: ignored by the fs-layer */
    void *data,		/* Need to define a data type for this in netbsd? */
    size_t *data_len)
{
    struct lwp *l = curlwp;
    struct vnode *dvp;
    struct cnode *cp;
    dev_t dev;
    struct coda_mntinfo *mi;
    struct vnode *rtvp;
    const struct cdevsw *cdev;
    CodaFid rootfid = INVAL_FID;
    CodaFid ctlfid = CTL_FID;
    int error;

    if (data == NULL)
	return EINVAL;
    if (vfsp->mnt_flag & MNT_GETARGS)
	return EINVAL;
    ENTRY;

    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(). */

    /*
     * XXX: coda passes the mount device as the entire mount args,
     * All other fs pass a structure contining a pointer.
     * In order to get sys_mount() to do the copyin() we've set a
     * fixed default size for the filename buffer.
     */
    /* Ensure that namei() doesn't run off the filename buffer */
    ((char *)data)[*data_len - 1] = 0;
    error = namei_simple_kernel((char *)data, NSM_FOLLOW_NOEMULROOT,
		&dvp);

    if (error) {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	return (error);
    }
    if (dvp->v_type != VCHR) {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	vrele(dvp);
	return(ENXIO);
    }
    dev = dvp->v_rdev;
    vrele(dvp);
    cdev = cdevsw_lookup(dev);
    if (cdev == NULL) {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	return(ENXIO);
    }

    /*
     * See if the device table matches our expectations.
     */
    if (cdev != &vcoda_cdevsw)
    {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	return(ENXIO);
    }

    if (minor(dev) >= NVCODA) {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	return(ENXIO);
    }

    /*
     * Initialize the mount record and link it to the vfs struct
     */
    mi = &coda_mnttbl[minor(dev)];

    if (!VC_OPEN(&mi->mi_vcomm)) {
	MARK_INT_FAIL(CODA_MOUNT_STATS);
	return(ENODEV);
    }

    /* No initialization (here) of mi_vcomm! */
    vfsp->mnt_data = mi;
    vfsp->mnt_stat.f_fsidx.__fsid_val[0] = 0;
    vfsp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CODA);
    vfsp->mnt_stat.f_fsid = vfsp->mnt_stat.f_fsidx.__fsid_val[0];
    vfsp->mnt_stat.f_namemax = CODA_MAXNAMLEN;
    mi->mi_vfsp = vfsp;

    /*
     * 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);
    rtvp = CTOV(cp);
    rtvp->v_vflag |= VV_ROOT;

    cp = make_coda_node(&ctlfid, vfsp, VCHR);

    coda_ctlvp = CTOV(cp);

    /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
    mi->mi_vfsp = vfsp;
    mi->mi_rootvp = rtvp;

    /* set filesystem block size */
    vfsp->mnt_stat.f_bsize = 8192;	    /* XXX -JJK */
    vfsp->mnt_stat.f_frsize = 8192;	    /* XXX -JJK */

    /* error is currently guaranteed to be zero, but in case some
       code changes... */
    CODADEBUG(1,
	     myprintf(("coda_mount returned %d\n",error)););