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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 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 _SYS_SODIRECT_H
#define _SYS_SODIRECT_H
/*
* Sodirect ...
*
* Currently the sodirect_t uses the sockfs streamhead STREAMS Q directly,
* in the future when we have STREAMless sockets a sonode Q will have to
* be implemented however the sodirect KPI shouldn't need to change.
*/
#ifdef __cplusplus
extern "C" {
#endif
typedef int (*sod_enq_func)();
typedef void (*sod_wakeup_func)();
typedef struct sodirect_s {
uint32_t sod_state; /* State bits */
uint32_t sod_want; /* Pending read byte count or 0 */
queue_t *sod_q; /* Socket Q */
sod_enq_func sod_enqueue; /* Call to enqueue an mblk_t */
sod_wakeup_func sod_wakeup; /* Call to awkake a read()er, if any */
mblk_t *sod_uioafh; /* To be freed list head, or NULL */
mblk_t *sod_uioaft; /* To be freed list tail */
kmutex_t *sod_lockp; /* Pointer to the lock needed */
/* to protect all members */
uioa_t sod_uioa; /* Pending uio_t for uioa_t use */
} sodirect_t;
/*
* sod_state bits:
*/
#define SOD_DISABLED 0 /* No more sodirect */
#define SOD_ENABLED 0x0001 /* sodirect_t enabled */
#define SOD_WAKE_NOT 0x0010 /* Wakeup not needed */
#define SOD_WAKE_NEED 0x0020 /* Wakeup needed */
#define SOD_WAKE_DONE 0x0040 /* Wakeup done */
#define SOD_WAKE_CLR ~(SOD_WAKE_NOT|SOD_WAKE_NEED|SOD_WAKE_DONE)
/*
* Usefull macros:
*/
#define SOD_QSETBE(p) { \
queue_t *q = (p)->sod_q; \
\
ASSERT(MUTEX_HELD((p)->sod_lockp)); \
\
mutex_enter(QLOCK(q)); \
if (q->q_flag & QFULL) \
q->q_flag |= QWANTW; \
mutex_exit(QLOCK(q)); \
}
#define SOD_QCLRBE(p) { \
queue_t *q = (p)->sod_q; \
\
ASSERT(MUTEX_HELD((p)->sod_lockp)); \
\
mutex_enter(QLOCK(q)); \
q->q_flag &= ~QWANTW; \
mutex_exit(QLOCK(q)); \
}
#define SOD_QEMPTY(p) ((p)->sod_q->q_first == NULL)
#define SOD_QFULL(p) ((p)->sod_q->q_flag & QFULL)
#define SOD_QCNT(p) ((p)->sod_q->q_count)
#define SOD_DISABLE(p) { \
if ((p) != NULL) \
(p)->sod_state &= ~SOD_ENABLED; \
}
#define SOD_QTOSODP(q) (q)->q_stream->sd_sodirect
#define SOD_SOTOSODP(so) ((sonode_t *)so)->so_direct
#define SOD_UIOAFINI(sodp) { \
if ((sodp) && (sodp)->sod_uioa.uioa_state & UIOA_ENABLED) { \
(sodp)->sod_uioa.uioa_state &= UIOA_CLR; \
(sodp)->sod_uioa.uioa_state |= UIOA_FINI; \
} \
}
struct sonode;
struct sodirect_s;
extern uio_t *sod_rcv_init(struct sonode *, int, struct uio **);
extern int sod_rcv_done(struct sonode *, struct uio *, struct uio *);
extern mblk_t *sod_uioa_mblk_init(struct sodirect_s *, mblk_t *, size_t);
extern void sod_uioa_so_init(struct sonode *, struct sodirect_s *,
struct uio *);
extern ssize_t sod_uioa_mblk(struct sonode *, mblk_t *);
extern void sod_uioa_mblk_done(struct sodirect_s *, mblk_t *);
extern void sod_init();
extern void sod_sock_init(struct sonode *, struct stdata *, sod_enq_func,
sod_wakeup_func, kmutex_t *);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SODIRECT_H */
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