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NetBSD/lib/libpuffs/puffs_priv.h

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/* $NetBSD: puffs_priv.h,v 1.45 2012/04/18 00:57:22 manu Exp $ */
/*
* Copyright (c) 2006, 2007, 2008 Antti Kantee. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _PUFFS_PRIVATE_H_
#define _PUFFS_PRIVATE_H_
#include <sys/types.h>
#include <fs/puffs/puffs_msgif.h>
#include <pthread.h>
#include <puffs.h>
#include <ucontext.h>
extern pthread_mutex_t pu_lock;
#define PU_LOCK() pthread_mutex_lock(&pu_lock)
#define PU_UNLOCK() pthread_mutex_unlock(&pu_lock)
#define PU_CMAP(pu, c) (pu->pu_cmap ? pu->pu_cmap(pu,c) : (struct puffs_node*)c)
struct puffs_framectrl {
puffs_framev_readframe_fn rfb;
puffs_framev_writeframe_fn wfb;
puffs_framev_cmpframe_fn cmpfb;
puffs_framev_gotframe_fn gotfb;
puffs_framev_fdnotify_fn fdnotfn;
};
struct puffs_fctrl_io {
struct puffs_framectrl *fctrl;
int io_fd;
int stat;
int rwait;
int wwait;
struct puffs_framebuf *cur_in;
TAILQ_HEAD(, puffs_framebuf) snd_qing; /* queueing to be sent */
TAILQ_HEAD(, puffs_framebuf) res_qing; /* q'ing for rescue */
LIST_HEAD(, puffs_fbevent) ev_qing; /* q'ing for events */
LIST_ENTRY(puffs_fctrl_io) fio_entries;
};
#define FIO_WR 0x01
#define FIO_WRGONE 0x02
#define FIO_RDGONE 0x04
#define FIO_DEAD 0x08
#define FIO_ENABLE_R 0x10
#define FIO_ENABLE_W 0x20
#define FIO_EN_WRITE(fio) \
(!(fio->stat & FIO_WR) \
&& ((!TAILQ_EMPTY(&fio->snd_qing) \
&& (fio->stat & FIO_ENABLE_W)) \
|| fio->wwait))
#define FIO_RM_WRITE(fio) \
((fio->stat & FIO_WR) \
&& (((TAILQ_EMPTY(&fio->snd_qing) \
|| (fio->stat & FIO_ENABLE_W) == 0)) \
&& (fio->wwait == 0)))
/*
* usermount: describes one file system instance
*/
struct puffs_usermount {
struct puffs_ops pu_ops;
int pu_fd;
size_t pu_maxreqlen;
uint32_t pu_flags;
int pu_cc_stackshift;
ucontext_t pu_mainctx;
#define PUFFS_CCMAXSTORE 32
int pu_cc_nstored;
int pu_kq;
int pu_state;
#define PU_STATEMASK 0x00ff
#define PU_INLOOP 0x0100
#define PU_ASYNCFD 0x0200
#define PU_HASKQ 0x0400
#define PU_PUFFSDAEMON 0x0800
#define PU_MAINRESTORE 0x1000
#define PU_DONEXIT 0x2000
#define PU_SETSTATE(pu, s) (pu->pu_state = (s) | (pu->pu_state & ~PU_STATEMASK))
#define PU_SETSFLAG(pu, s) (pu->pu_state |= (s))
#define PU_CLRSFLAG(pu, s) \
(pu->pu_state = ((pu->pu_state & ~(s)) | (pu->pu_state & PU_STATEMASK)))
int pu_dpipe[2];
struct puffs_node *pu_pn_root;
LIST_HEAD(, puffs_node) pu_pnodelst;
LIST_HEAD(, puffs_cc) pu_ccmagazin;
TAILQ_HEAD(, puffs_cc) pu_lazyctx;
TAILQ_HEAD(, puffs_cc) pu_sched;
pu_cmap_fn pu_cmap;
pu_pathbuild_fn pu_pathbuild;
pu_pathtransform_fn pu_pathtransform;
pu_pathcmp_fn pu_pathcmp;
pu_pathfree_fn pu_pathfree;
pu_namemod_fn pu_namemod;
pu_errnotify_fn pu_errnotify;
pu_prepost_fn pu_oppre;
pu_prepost_fn pu_oppost;
struct puffs_framectrl pu_framectrl[2];
#define PU_FRAMECTRL_FS 0
#define PU_FRAMECTRL_USER 1
LIST_HEAD(, puffs_fctrl_io) pu_ios;
LIST_HEAD(, puffs_fctrl_io) pu_ios_rmlist;
struct kevent *pu_evs;
size_t pu_nevs;
puffs_ml_loop_fn pu_ml_lfn;
struct timespec pu_ml_timeout;
struct timespec *pu_ml_timep;
struct puffs_kargs *pu_kargp;
uint64_t pu_nextreq;
void *pu_privdata;
};
/* call context */
struct puffs_cc;
typedef void (*puffs_ccfunc)(struct puffs_cc *);
struct puffs_cc {
struct puffs_usermount *pcc_pu;
struct puffs_framebuf *pcc_pb;
/* real cc */
union {
struct {
ucontext_t uc; /* "continue" */
ucontext_t uc_ret; /* "yield" */
} real;
struct {
puffs_ccfunc func;
void *farg;
} fake;
} pcc_u;
pid_t pcc_pid;
lwpid_t pcc_lid;
int pcc_flags;
TAILQ_ENTRY(puffs_cc) pcc_schedent;
LIST_ENTRY(puffs_cc) pcc_rope;
};
#define pcc_uc pcc_u.real.uc
#define pcc_uc_ret pcc_u.real.uc_ret
#define pcc_func pcc_u.fake.func
#define pcc_farg pcc_u.fake.farg
#define PCC_DONE 0x01
#define PCC_BORROWED 0x02
#define PCC_HASCALLER 0x04
#define PCC_MLCONT 0x08
struct puffs_newinfo {
void **pni_cookie;
enum vtype *pni_vtype;
voff_t *pni_size;
dev_t *pni_rdev;
struct vattr *pni_va;
struct timespec *pni_va_ttl;
struct timespec *pni_cn_ttl;
};
#define PUFFS_MAKEKCRED(to, from) \
/*LINTED: tnilxnaht, the cast is ok */ \
const struct puffs_kcred *to = (const void *)from
#define PUFFS_MAKECRED(to, from) \
/*LINTED: tnilxnaht, the cast is ok */ \
const struct puffs_cred *to = (const void *)from
#define PUFFS_KCREDTOCRED(to, from) \
/*LINTED: tnilxnaht, the cast is ok */ \
to = (void *)from
__BEGIN_DECLS
void puffs__framev_input(struct puffs_usermount *, struct puffs_framectrl *,
struct puffs_fctrl_io *);
int puffs__framev_output(struct puffs_usermount *, struct puffs_framectrl*,
struct puffs_fctrl_io *);
void puffs__framev_exit(struct puffs_usermount *);
void puffs__framev_readclose(struct puffs_usermount *,
struct puffs_fctrl_io *, int);
void puffs__framev_writeclose(struct puffs_usermount *,
struct puffs_fctrl_io *, int);
void puffs__framev_notify(struct puffs_fctrl_io *, int);
void *puffs__framebuf_getdataptr(struct puffs_framebuf *);
int puffs__framev_addfd_ctrl(struct puffs_usermount *, int, int,
struct puffs_framectrl *);
void puffs__framebuf_moveinfo(struct puffs_framebuf *,
struct puffs_framebuf *);
void puffs__theloop(struct puffs_cc *);
void puffs__ml_dispatch(struct puffs_usermount *, struct puffs_framebuf *);
int puffs__cc_create(struct puffs_usermount *, puffs_ccfunc,
struct puffs_cc **);
void puffs__cc_cont(struct puffs_cc *);
void puffs__cc_destroy(struct puffs_cc *, int);
void puffs__cc_setcaller(struct puffs_cc *, pid_t, lwpid_t);
void puffs__goto(struct puffs_cc *);
int puffs__cc_savemain(struct puffs_usermount *);
int puffs__cc_restoremain(struct puffs_usermount *);
void puffs__cc_exit(struct puffs_usermount *);
int puffs__fsframe_read(struct puffs_usermount *, struct puffs_framebuf *,
int, int *);
int puffs__fsframe_write(struct puffs_usermount *, struct puffs_framebuf *,
int, int *);
int puffs__fsframe_cmp(struct puffs_usermount *, struct puffs_framebuf *,
struct puffs_framebuf *, int *);
void puffs__fsframe_gotframe(struct puffs_usermount *,
struct puffs_framebuf *);
uint64_t puffs__nextreq(struct puffs_usermount *pu);
__END_DECLS
#endif /* _PUFFS_PRIVATE_H_ */
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