diff options
Diffstat (limited to 'lib/libspl/include/sys')
| -rw-r--r-- | lib/libspl/include/sys/Makefile.am | 1 | ||||
| -rw-r--r-- | lib/libspl/include/sys/uio.h | 152 |
2 files changed, 153 insertions, 0 deletions
diff --git a/lib/libspl/include/sys/Makefile.am b/lib/libspl/include/sys/Makefile.am index 8f9c2fa99..5125b8ac3 100644 --- a/lib/libspl/include/sys/Makefile.am +++ b/lib/libspl/include/sys/Makefile.am @@ -39,6 +39,7 @@ libspl_HEADERS = \ $(top_srcdir)/lib/libspl/include/sys/types32.h \ $(top_srcdir)/lib/libspl/include/sys/types.h \ $(top_srcdir)/lib/libspl/include/sys/tzfile.h \ + $(top_srcdir)/lib/libspl/include/sys/uio.h \ $(top_srcdir)/lib/libspl/include/sys/va_list.h \ $(top_srcdir)/lib/libspl/include/sys/varargs.h \ $(top_srcdir)/lib/libspl/include/sys/vnode.h \ diff --git a/lib/libspl/include/sys/uio.h b/lib/libspl/include/sys/uio.h new file mode 100644 index 000000000..6d892dd3e --- /dev/null +++ b/lib/libspl/include/sys/uio.h @@ -0,0 +1,152 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2005 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ +/* All Rights Reserved */ + +/* + * University Copyright- Copyright (c) 1982, 1986, 1988 + * The Regents of the University of California + * All Rights Reserved + * + * University Acknowledgment- Portions of this document are derived from + * software developed by the University of California, Berkeley, and its + * contributors. + */ + +#ifndef _LIBSPL_SYS_UIO_H +#define _LIBSPL_SYS_UIO_H + +#include <sys/types.h> +#include_next <sys/uio.h> + +#ifdef __APPLE__ +#include <sys/_types/_iovec_t.h> +#endif + +#include <stdint.h> +typedef struct iovec iovec_t; + +#if defined(__linux__) || defined(__APPLE__) +typedef enum uio_rw { + UIO_READ = 0, + UIO_WRITE = 1, +} uio_rw_t; + +typedef enum uio_seg { + UIO_USERSPACE = 0, + UIO_SYSSPACE = 1, + UIO_USERISPACE = 2, +} uio_seg_t; + +#elif defined(__FreeBSD__) +typedef enum uio_seg uio_seg_t; +#endif + +typedef struct uio { + struct iovec *uio_iov; /* pointer to array of iovecs */ + int uio_iovcnt; /* number of iovecs */ + offset_t uio_loffset; /* file offset */ + uio_seg_t uio_segflg; /* address space (kernel or user) */ + uint16_t uio_fmode; /* file mode flags */ + uint16_t uio_extflg; /* extended flags */ + offset_t uio_limit; /* u-limit (maximum byte offset) */ + ssize_t uio_resid; /* residual count */ +} uio_t; + +typedef enum xuio_type { + UIOTYPE_ASYNCIO, + UIOTYPE_ZEROCOPY, +} xuio_type_t; + +#define UIOA_IOV_MAX 16 + +typedef struct uioa_page_s { /* locked uio_iov state */ + int uioa_pfncnt; /* count of pfn_t(s) in *uioa_ppp */ + void **uioa_ppp; /* page_t or pfn_t array */ + caddr_t uioa_base; /* address base */ + size_t uioa_len; /* span length */ +} uioa_page_t; + +typedef struct xuio { + uio_t xu_uio; /* embedded UIO structure */ + + /* Extended uio fields */ + enum xuio_type xu_type; /* uio type */ + union { + struct { + uint32_t xu_a_state; /* state of async i/o */ + ssize_t xu_a_mbytes; /* bytes moved */ + uioa_page_t *xu_a_lcur; /* uioa_locked[] pointer */ + void **xu_a_lppp; /* lcur->uioa_pppp[] pointer */ + void *xu_a_hwst[4]; /* opaque hardware state */ + uioa_page_t xu_a_locked[UIOA_IOV_MAX]; + } xu_aio; + + struct { + int xu_zc_rw; /* read or write buffer */ + void *xu_zc_priv; /* fs specific */ + } xu_zc; + } xu_ext; +} xuio_t; + +#define XUIO_XUZC_PRIV(xuio) xuio->xu_ext.xu_zc.xu_zc_priv +#define XUIO_XUZC_RW(xuio) xuio->xu_ext.xu_zc.xu_zc_rw + +#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 + +static inline void +uio_iov_at_index(uio_t *uio, uint_t idx, void **base, uint64_t *len) +{ + *base = uio_iovbase(uio, idx); + *len = uio_iovlen(uio, idx); +} + +static inline void +uio_advance(uio_t *uio, size_t size) +{ + uio->uio_resid -= size; + uio->uio_loffset += size; +} + +static inline offset_t +uio_index_at_offset(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); + (*vec_idx)++; + } + + return (off); +} + +#endif /* _SYS_UIO_H */ |