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puffs_priv.h revision 1.2 
      1 /*	$NetBSD: puffs_priv.h,v 1.2 2006/12/29 15:28:11 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2006 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the company nor the name of the author may be used to
     15  *    endorse or promote products derived from this software without specific
     16  *    prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #ifndef _PUFFS_PRIVATE_H_
     32 #define _PUFFS_PRIVATE_H_
     33 
     34 #include <sys/types.h>
     35 #include <fs/puffs/puffs_msgif.h>
     36 
     37 #include <puffs.h>
     38 #include <ucontext.h>
     39 
     40 /* call context */
     41 
     42 struct puffs_cc {
     43 	struct puffs_usermount	*pcc_pu;
     44 	struct puffs_req	*pcc_preq;
     45 
     46 	ucontext_t		pcc_uc;		/* "continue" 		*/
     47 	ucontext_t		pcc_uc_ret;	/* "yield" 		*/
     48 	void			*pcc_stack;
     49 
     50 	int			pcc_flags;
     51 
     52 	/* these are for threading information to the implementation	*/
     53 	void			*pcc_priv;
     54 	int			pcc_rv;
     55 
     56 	TAILQ_ENTRY(puffs_cc)	entries;
     57 };
     58 #define PCC_ONCE	0x01
     59 #define PCC_REALCC	0x02
     60 #define PCC_FREEPRIV	0x04
     61 #define PCC_PREQ_NOCOPY	0x08
     62 #define PCC_DONE	0x10
     63 
     64 #define PCC_CALL_NONE	0x10000
     65 #define PCC_CALL_IN	0x20000
     66 #define PCC_CALL_OUT	0x40000
     67 #define PCC_CALL_MASK	0x70000
     68 
     69 #define pcc_callstat(a)	   (a->pcc_flags & PCC_CALL_MASK)
     70 #define pcc_callset(a, b)  (a->pcc_flags = (a->pcc_flags & ~PCC_CALL_MASK) | b)
     71 
     72 #define pcc_init_local(ap)   						\
     73 do {									\
     74 	memset(ap, 0, sizeof(*ap));					\
     75 	(ap)->pcc_flags = PCC_ONCE;					\
     76 } while (/*CONSTCOND*/0)
     77 
     78 /*
     79  * Reqs
     80  */
     81 
     82 struct puffs_getreq {
     83 	struct puffs_usermount	*pgr_pu;
     84 
     85 	struct puffs_reqh_get	pgr_phg;
     86 	struct puffs_reqh_get	pgr_phg_orig;
     87 
     88 	struct puffs_req	*pgr_nextpreq;
     89 	size_t			pgr_advance;
     90 
     91 	/* diagnostics */
     92 	int			pgr_nppr;
     93 };
     94 
     95 struct puffs_putreq {
     96 	struct puffs_usermount *ppr_pu;
     97 
     98 	struct puffs_reqh_put	ppr_php;
     99 
    100 	/* to adjust next request info */
    101 	void			**ppr_buf;
    102 	size_t			*ppr_buflen;
    103 	uint64_t 		*ppr_id;
    104 
    105 	/* for delayed action freeing of preq's */
    106 	TAILQ_HEAD(, puffs_cc)	ppr_pccq;
    107 
    108 	/* diagnostics */
    109 	struct puffs_getreq	*ppr_pgr;
    110 };
    111 
    112 __BEGIN_DECLS
    113 struct puffs_cc		*puffs_cc_create(struct puffs_usermount *,
    114 					 struct puffs_req *);
    115 void			puffs_cc_destroy(struct puffs_cc *);
    116 
    117 void			puffs_calldispatcher(struct puffs_cc *);
    118 __END_DECLS
    119 
    120 #endif /* _PUFFS_PRIVATE_H_ */
    121