Ejemplo n.º 1
0
int
fuse_filehandle_open(struct vnode *vp,
    fufh_type_t fufh_type,
    struct fuse_filehandle **fufhp,
    struct thread *td,
    struct ucred *cred)
{
	struct fuse_dispatcher fdi;
	struct fuse_open_in *foi;
	struct fuse_open_out *foo;

	int err = 0;
	int isdir = 0;
	int oflags = 0;
	int op = FUSE_OPEN;

	fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
	    vp, fufh_type);

	if (fuse_filehandle_valid(vp, fufh_type)) {
		panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
		    fufh_type);
		/* NOTREACHED */
	}
	/*
         * Note that this means we are effectively FILTERING OUT open() flags.
         */
	oflags = fuse_filehandle_xlate_to_oflags(fufh_type);

	if (vnode_isdir(vp)) {
		isdir = 1;
		op = FUSE_OPENDIR;
		if (fufh_type != FUFH_RDONLY) {
			printf("FUSE:non-rdonly fh requested for a directory?\n");
			fufh_type = FUFH_RDONLY;
		}
	}
	fdisp_init(&fdi, sizeof(*foi));
	fdisp_make_vp(&fdi, op, vp, td, cred);

	foi = fdi.indata;
	foi->flags = oflags;

	if ((err = fdisp_wait_answ(&fdi))) {
		debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
		if (err == ENOENT) {
			fuse_internal_vnode_disappear(vp);
		}
		goto out;
	}
	foo = fdi.answ;

	fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
	fuse_vnode_open(vp, foo->open_flags, td);

out:
	fdisp_destroy(&fdi);
	return err;
}
Ejemplo n.º 2
0
/*
    struct vnop_open_args {
	struct vnode *a_vp;
	int  a_mode;
	struct ucred *a_cred;
	struct thread *a_td;
	int a_fdidx; / struct file *a_fp;
    };
*/
static int
fuse_vnop_open(struct vop_open_args *ap)
{
	struct vnode *vp = ap->a_vp;
	int mode = ap->a_mode;
	struct thread *td = ap->a_td;
	struct ucred *cred = ap->a_cred;

	fufh_type_t fufh_type;
	struct fuse_vnode_data *fvdat;

	int error, isdir = 0;
	int32_t fuse_open_flags;

	FS_DEBUG2G("inode=%ju mode=0x%x\n", (uintmax_t)VTOI(vp), mode);

	if (fuse_isdeadfs(vp)) {
		return ENXIO;
	}
	fvdat = VTOFUD(vp);

	if (vnode_isdir(vp)) {
		isdir = 1;
	}
	fuse_open_flags = 0;
	if (isdir) {
		fufh_type = FUFH_RDONLY;
	} else {
		fufh_type = fuse_filehandle_xlate_from_fflags(mode);
		/*
		 * For WRONLY opens, force DIRECT_IO.  This is necessary
		 * since writing a partial block through the buffer cache
		 * will result in a read of the block and that read won't
		 * be allowed by the WRONLY open.
		 */
		if (fufh_type == FUFH_WRONLY ||
		    (fvdat->flag & FN_DIRECTIO) != 0)
			fuse_open_flags = FOPEN_DIRECT_IO;
	}

	if (fuse_filehandle_validrw(vp, fufh_type) != FUFH_INVALID) {
		fuse_vnode_open(vp, fuse_open_flags, td);
		return 0;
	}
	error = fuse_filehandle_open(vp, fufh_type, NULL, td, cred);

	return error;
}
Ejemplo n.º 3
0
/*
    struct vnop_open_args {
	struct vnode *a_vp;
	int  a_mode;
	struct ucred *a_cred;
	struct thread *a_td;
	int a_fdidx; / struct file *a_fp;
    };
*/
static int
fuse_vnop_open(struct vop_open_args *ap)
{
	struct vnode *vp = ap->a_vp;
	int mode = ap->a_mode;
	struct thread *td = ap->a_td;
	struct ucred *cred = ap->a_cred;

	fufh_type_t fufh_type;
	struct fuse_vnode_data *fvdat;

	int error, isdir = 0;

	FS_DEBUG2G("inode=%ju mode=0x%x\n", (uintmax_t)VTOI(vp), mode);

	if (fuse_isdeadfs(vp)) {
		return ENXIO;
	}
	fvdat = VTOFUD(vp);

	if (vnode_isdir(vp)) {
		isdir = 1;
	}
	if (isdir) {
		fufh_type = FUFH_RDONLY;
	} else {
		fufh_type = fuse_filehandle_xlate_from_fflags(mode);
	}

	if (fuse_filehandle_valid(vp, fufh_type)) {
		fuse_vnode_open(vp, 0, td);
		return 0;
	}
	error = fuse_filehandle_open(vp, fufh_type, NULL, td, cred);

	return error;
}
Ejemplo n.º 4
0
/*
    struct vnop_create_args {
	struct vnode *a_dvp;
	struct vnode **a_vpp;
	struct componentname *a_cnp;
	struct vattr *a_vap;
    };
*/
static int
fuse_vnop_create(struct vop_create_args *ap)
{
	struct vnode *dvp = ap->a_dvp;
	struct vnode **vpp = ap->a_vpp;
	struct componentname *cnp = ap->a_cnp;
	struct vattr *vap = ap->a_vap;
	struct thread *td = cnp->cn_thread;
	struct ucred *cred = cnp->cn_cred;

	struct fuse_open_in *foi;
	struct fuse_entry_out *feo;
	struct fuse_dispatcher fdi;
	struct fuse_dispatcher *fdip = &fdi;

	int err;

	struct mount *mp = vnode_mount(dvp);
	uint64_t parentnid = VTOFUD(dvp)->nid;
	mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
	uint64_t x_fh_id;
	uint32_t x_open_flags;

	fuse_trace_printf_vnop();

	if (fuse_isdeadfs(dvp)) {
		return ENXIO;
	}
	bzero(&fdi, sizeof(fdi));

	/* XXX:	Will we ever want devices ? */
	if ((vap->va_type != VREG)) {
		MPASS(vap->va_type != VFIFO);
		goto bringup;
	}
	debug_printf("parent nid = %ju, mode = %x\n", (uintmax_t)parentnid,
	    mode);

	fdisp_init(fdip, sizeof(*foi) + cnp->cn_namelen + 1);
	if (!fsess_isimpl(mp, FUSE_CREATE)) {
		debug_printf("eh, daemon doesn't implement create?\n");
		return (EINVAL);
	}
	fdisp_make(fdip, FUSE_CREATE, vnode_mount(dvp), parentnid, td, cred);

	foi = fdip->indata;
	foi->mode = mode;
	foi->flags = O_CREAT | O_RDWR;

	memcpy((char *)fdip->indata + sizeof(*foi), cnp->cn_nameptr,
	    cnp->cn_namelen);
	((char *)fdip->indata)[sizeof(*foi) + cnp->cn_namelen] = '\0';

	err = fdisp_wait_answ(fdip);

	if (err) {
		if (err == ENOSYS)
			fsess_set_notimpl(mp, FUSE_CREATE);
		debug_printf("create: got err=%d from daemon\n", err);
		goto out;
	}
bringup:
	feo = fdip->answ;

	if ((err = fuse_internal_checkentry(feo, VREG))) {
		goto out;
	}
	err = fuse_vnode_get(mp, feo->nodeid, dvp, vpp, cnp, VREG);
	if (err) {
		struct fuse_release_in *fri;
		uint64_t nodeid = feo->nodeid;
		uint64_t fh_id = ((struct fuse_open_out *)(feo + 1))->fh;

		fdisp_init(fdip, sizeof(*fri));
		fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
		fri = fdip->indata;
		fri->fh = fh_id;
		fri->flags = OFLAGS(mode);
		fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
		fuse_insert_message(fdip->tick);
		return err;
	}
	ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");

	fdip->answ = feo + 1;

	x_fh_id = ((struct fuse_open_out *)(feo + 1))->fh;
	x_open_flags = ((struct fuse_open_out *)(feo + 1))->open_flags;
	fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, x_fh_id);
	fuse_vnode_open(*vpp, x_open_flags, td);
	cache_purge_negative(dvp);

out:
	fdisp_destroy(fdip);
	return err;
}