/*
struct vnop_strategy_args {
struct vnode *a_vp;
struct buf *a_bp;
};
*/
static int
fuse_vnop_strategy(struct vop_strategy_args *ap)
{
struct vnode *vp = ap->a_vp;
struct buf *bp = ap->a_bp;
fuse_trace_printf_vnop();
if (!vp || fuse_isdeadfs(vp)) {
bp->b_ioflags |= BIO_ERROR;
bp->b_error = ENXIO;
bufdone(bp);
return ENXIO;
}
if (bp->b_iocmd == BIO_WRITE)
fuse_vnode_refreshsize(vp, NOCRED);
(void)fuse_io_strategy(vp, bp);
/*
* This is a dangerous function. If returns error, that might mean a
* panic. We prefer pretty much anything over being forced to panic
* by a malicious daemon (a demon?). So we just return 0 anyway. You
* should never mind this: this function has its own error
* propagation mechanism via the argument buffer, so
* not-that-melodramatic residents of the call chain still will be
* able to know what to do.
*/
return 0;
}
/*
struct vnop_fsync_args {
struct vnodeop_desc *a_desc;
struct vnode * a_vp;
struct ucred * a_cred;
int a_waitfor;
struct thread * a_td;
};
*/
static int
fuse_vnop_fsync(struct vop_fsync_args *ap)
{
struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;
struct fuse_filehandle *fufh;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
int type, err = 0;
fuse_trace_printf_vnop();
if (fuse_isdeadfs(vp)) {
return 0;
}
if ((err = vop_stdfsync(ap)))
return err;
if (!fsess_isimpl(vnode_mount(vp),
(vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) {
goto out;
}
for (type = 0; type < FUFH_MAXTYPE; type++) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
fuse_internal_fsync(vp, td, NULL, fufh);
}
}
out:
return 0;
}
/*
struct vnop_mkdir_args {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
};
*/
static int
fuse_vnop_mkdir(struct vop_mkdir_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;
int err = 0;
struct fuse_mkdir_in fmdi;
fuse_trace_printf_vnop();
if (fuse_isdeadfs(dvp)) {
return ENXIO;
}
fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
err = fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
sizeof(fmdi), VDIR);
if (err == 0) {
fuse_invalidate_attr(dvp);
}
return err;
}
/*
struct vnop_write_args {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
};
*/
static int
fuse_vnop_write(struct vop_write_args *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int ioflag = ap->a_ioflag;
struct ucred *cred = ap->a_cred;
fuse_trace_printf_vnop();
if (fuse_isdeadfs(vp)) {
return ENXIO;
}
fuse_vnode_refreshsize(vp, cred);
return fuse_io_dispatch(vp, uio, ioflag, cred);
}
/*
struct vnop_link_args {
struct vnode *a_tdvp;
struct vnode *a_vp;
struct componentname *a_cnp;
};
*/
static int
fuse_vnop_link(struct vop_link_args *ap)
{
struct vnode *vp = ap->a_vp;
struct vnode *tdvp = ap->a_tdvp;
struct componentname *cnp = ap->a_cnp;
struct vattr *vap = VTOVA(vp);
struct fuse_dispatcher fdi;
struct fuse_entry_out *feo;
struct fuse_link_in fli;
int err;
fuse_trace_printf_vnop();
if (fuse_isdeadfs(vp)) {
return ENXIO;
}
if (vnode_mount(tdvp) != vnode_mount(vp)) {
return EXDEV;
}
if (vap->va_nlink >= FUSE_LINK_MAX) {
return EMLINK;
}
fli.oldnodeid = VTOI(vp);
fdisp_init(&fdi, 0);
fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
FUSE_LINK, &fli, sizeof(fli), &fdi);
if ((err = fdisp_wait_answ(&fdi))) {
goto out;
}
feo = fdi.answ;
err = fuse_internal_checkentry(feo, vnode_vtype(vp));
fuse_invalidate_attr(tdvp);
fuse_invalidate_attr(vp);
out:
fdisp_destroy(&fdi);
return err;
}
/*
struct vnop_close_args {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
};
*/
static int
fuse_vnop_close(struct vop_close_args *ap)
{
struct vnode *vp = ap->a_vp;
struct ucred *cred = ap->a_cred;
int fflag = ap->a_fflag;
fufh_type_t fufh_type;
fuse_trace_printf_vnop();
if (fuse_isdeadfs(vp)) {
return 0;
}
if (vnode_isdir(vp)) {
if (fuse_filehandle_valid(vp, FUFH_RDONLY)) {
fuse_filehandle_close(vp, FUFH_RDONLY, NULL, cred);
}
return 0;
}
if (fflag & IO_NDELAY) {
return 0;
}
fufh_type = fuse_filehandle_xlate_from_fflags(fflag);
if (!fuse_filehandle_valid(vp, fufh_type)) {
int i;
for (i = 0; i < FUFH_MAXTYPE; i++)
if (fuse_filehandle_valid(vp, i))
break;
if (i == FUFH_MAXTYPE)
panic("FUSE: fufh type %d found to be invalid in close"
" (fflag=0x%x)\n",
fufh_type, fflag);
}
if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
fuse_vnode_savesize(vp, cred);
}
return 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;
}