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Differential D28677 Diff 83996 sys/contrib/openzfs/module/os/freebsd/spl/spl_uio.c

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sys/contrib/openzfs/module/os/freebsd/spl/spl_uio.c

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/* /*
* $FreeBSD$ * $FreeBSD$
*/ */
#include <sys/param.h> #include <sys/param.h>
#include <sys/uio.h> #include <sys/uio.h>
#include <sys/vnode.h> #include <sys/vnode.h>
#include <sys/zfs_znode.h>
/* /*
* same as uiomove() but doesn't modify uio structure. * same as zfs_uiomove() but doesn't modify uio structure.
* return in cbytes how many bytes were copied. * return in cbytes how many bytes were copied.
*/ */
int int
uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes) zfs_uiocopy(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio, size_t *cbytes)
{ {
struct iovec small_iovec[1]; struct iovec small_iovec[1];
struct uio small_uio_clone; struct uio small_uio_clone;
struct uio *uio_clone; struct uio *uio_clone;
int error; int error;
ASSERT3U(uio->uio_rw, ==, rw); ASSERT3U(zfs_uio_rw(uio), ==, rw);
if (uio->uio_iovcnt == 1) { if (zfs_uio_iovcnt(uio) == 1) {
small_uio_clone = *uio; small_uio_clone = *(GET_UIO_STRUCT(uio));
small_iovec[0] = *uio->uio_iov; small_iovec[0] = *(GET_UIO_STRUCT(uio)->uio_iov);
small_uio_clone.uio_iov = small_iovec; small_uio_clone.uio_iov = small_iovec;
uio_clone = &small_uio_clone; uio_clone = &small_uio_clone;
} else { } else {
uio_clone = cloneuio(uio); uio_clone = cloneuio(GET_UIO_STRUCT(uio));
} }
error = vn_io_fault_uiomove(p, n, uio_clone); error = vn_io_fault_uiomove(p, n, uio_clone);
*cbytes = uio->uio_resid - uio_clone->uio_resid; *cbytes = zfs_uio_resid(uio) - uio_clone->uio_resid;
if (uio_clone != &small_uio_clone) if (uio_clone != &small_uio_clone)
free(uio_clone, M_IOV); free(uio_clone, M_IOV);
return (error); return (error);
} }
/* /*
* Drop the next n chars out of *uiop. * Drop the next n chars out of *uiop.
*/ */
void void
uioskip(uio_t *uio, size_t n) zfs_uioskip(zfs_uio_t *uio, size_t n)
{ {
enum uio_seg segflg; zfs_uio_seg_t segflg;
/* For the full compatibility with illumos. */ /* For the full compatibility with illumos. */
if (n > uio->uio_resid) if (n > zfs_uio_resid(uio))
return; return;
segflg = uio->uio_segflg; segflg = zfs_uio_segflg(uio);
uio->uio_segflg = UIO_NOCOPY; zfs_uio_segflg(uio) = UIO_NOCOPY;
uiomove(NULL, n, uio->uio_rw, uio); zfs_uiomove(NULL, n, zfs_uio_rw(uio), uio);
uio->uio_segflg = segflg; zfs_uio_segflg(uio) = segflg;
}
int
zfs_uio_fault_move(void *p, size_t n, zfs_uio_rw_t dir, zfs_uio_t *uio)
{
ASSERT(zfs_uio_rw(uio) == dir);
return (vn_io_fault_uiomove(p, n, GET_UIO_STRUCT(uio)));
} }