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Extending FreeBSD UIO Struct

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In FreeBSD the struct uio was just a typedef to uio_t. In order to
extend this struct, outside of the definition for the struct uio, the
struct uio has been embedded inside of a uio_t struct.

Also renamed all the uio_* interfaces to be zfs_uio_* to make it clear
this is a ZFS interface.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes #11438
This commit is contained in:
Brian Atkinson
2021-01-20 22:27:30 -07:00
committed by Tony Hutter
parent cd4f9572d0
commit 0b1e6fcc3e
37 changed files with 521 additions and 457 deletions
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include/os/freebsd/spl/sys/uio.h
+48 -31
View File
@@ -35,55 +35,72 @@
#include <sys/_uio.h>
#include <sys/debug.h>
#define uio_loffset uio_offset
typedef struct uio uio_t;
typedef struct iovec iovec_t;
typedef enum uio_seg uio_seg_t;
typedef enum uio_seg zfs_uio_seg_t;
typedef enum uio_rw zfs_uio_rw_t;
typedef struct zfs_uio {
struct uio *uio;
} zfs_uio_t;
#define GET_UIO_STRUCT(u) (u)->uio
#define zfs_uio_segflg(u) GET_UIO_STRUCT(u)->uio_segflg
#define zfs_uio_offset(u) GET_UIO_STRUCT(u)->uio_offset
#define zfs_uio_resid(u) GET_UIO_STRUCT(u)->uio_resid
#define zfs_uio_iovcnt(u) GET_UIO_STRUCT(u)->uio_iovcnt
#define zfs_uio_iovlen(u, idx) GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_len
#define zfs_uio_iovbase(u, idx) GET_UIO_STRUCT(u)->uio_iov[(idx)].iov_base
#define zfs_uio_td(u) GET_UIO_STRUCT(u)->uio_td
#define zfs_uio_rw(u) GET_UIO_STRUCT(u)->uio_rw
#define zfs_uio_fault_disable(u, set)
#define zfs_uio_prefaultpages(size, u) (0)
static __inline void
zfs_uio_init(zfs_uio_t *uio, struct uio *uio_s)
{
GET_UIO_STRUCT(uio) = uio_s;
}
static __inline void
zfs_uio_setoffset(zfs_uio_t *uio, offset_t off)
{
zfs_uio_offset(uio) = off;
}
static __inline int
zfs_uiomove(void *cp, size_t n, enum uio_rw dir, uio_t *uio)
zfs_uiomove(void *cp, size_t n, zfs_uio_rw_t dir, zfs_uio_t *uio)
{
ASSERT(uio->uio_rw == dir);
return (uiomove(cp, (int)n, uio));
ASSERT(zfs_uio_rw(uio) == dir);
return (uiomove(cp, (int)n, GET_UIO_STRUCT(uio)));
}
#define uiomove(cp, n, dir, uio) zfs_uiomove((cp), (n), (dir), (uio))
int uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes);
void uioskip(uio_t *uiop, size_t n);
#define uio_segflg(uio) (uio)->uio_segflg
#define uio_offset(uio) (uio)->uio_loffset
#define uio_resid(uio) (uio)->uio_resid
#define uio_iovcnt(uio) (uio)->uio_iovcnt
#define uio_iovlen(uio, idx) (uio)->uio_iov[(idx)].iov_len
#define uio_iovbase(uio, idx) (uio)->uio_iov[(idx)].iov_base
#define uio_fault_disable(uio, set)
#define uio_prefaultpages(size, uio) (0)
int zfs_uiocopy(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio,
size_t *cbytes);
void zfs_uioskip(zfs_uio_t *uiop, size_t n);
int zfs_uio_fault_move(void *p, size_t n, zfs_uio_rw_t dir, zfs_uio_t *uio);
static inline void
uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len)
zfs_uio_iov_at_index(zfs_uio_t *uio, uint_t idx, void **base, uint64_t *len)
{
*base = uio_iovbase(uio, idx);
*len = uio_iovlen(uio, idx);
*base = zfs_uio_iovbase(uio, idx);
*len = zfs_uio_iovlen(uio, idx);
}
static inline void
uio_advance(uio_t *uio, size_t size)
zfs_uio_advance(zfs_uio_t *uio, size_t size)
{
uio->uio_resid -= size;
uio->uio_loffset += size;
zfs_uio_resid(uio) -= size;
zfs_uio_offset(uio) += size;
}
static inline offset_t
uio_index_at_offset(uio_t *uio, offset_t off, uint_t *vec_idx)
zfs_uio_index_at_offset(zfs_uio_t *uio, offset_t off, uint_t *vec_idx)
{
*vec_idx = 0;
while (*vec_idx < uio_iovcnt(uio) && off >= uio_iovlen(uio, *vec_idx)) {
off -= uio_iovlen(uio, *vec_idx);
while (*vec_idx < zfs_uio_iovcnt(uio) &&
off >= zfs_uio_iovlen(uio, *vec_idx)) {
off -= zfs_uio_iovlen(uio, *vec_idx);
(*vec_idx)++;
}