/*
* Simplified in-kernel wrapper calls for extended attribute access.
* Both calls pass in a NULL credential, authorizing a "kernel" access.
* Set IO_NODELOCKED in ioflg if the vnode is already locked.
*/
int
vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
const char *attrname, size_t *buflen, void *bf, struct lwp *l)
{
struct uio auio;
struct iovec aiov;
int error;
aiov.iov_len = *buflen;
aiov.iov_base = bf;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_offset = 0;
auio.uio_resid = *buflen;
UIO_SETUP_SYSSPACE(&auio);
if ((ioflg & IO_NODELOCKED) == 0)
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, &auio, NULL, NULL);
if ((ioflg & IO_NODELOCKED) == 0)
VOP_UNLOCK(vp);
if (error == 0)
*buflen = *buflen - auio.uio_resid;
return (error);
}
int
RUMP_VOP_GETEXTATTR(struct vnode *vp,
int attrnamespace,
const char *name,
struct uio *uio,
size_t *size,
struct kauth_cred *cred)
{
int error;
rump_schedule();
error = VOP_GETEXTATTR(vp, attrnamespace, name, uio, size, cred);
rump_unschedule();
return error;
}
