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minix/lib/libpuffs/puffs_priv.h
Thomas Veerman 490e0de548 Import librefuse and libpuffs 
Import libpuffs and our port of libpuffs. The port was done as part of
GSoC 2011 FUSE project, done by Evgeniy Ivanov. The librefuse import
did not require any porting efforts. Libpuffs has been modified to
understand our VFS-FS protocol and translate between that and PUFFS. As
an example that it works, fuse-ntfs-3g from pkgsrc can be compiled and
used to mount ntfs partitions:
mount -t ntfs-3g <device> <mountpoint>

FUSE only works with the asynchronous version of VFS. See <docs/UPDATING> on
how to run AVFS.

This patch further includes some changes to mount(1) and mount(2) so it's
possible to use file systems provided by pkgsrc (note: manual modifications
to /etc/system.conf are still needed. There has been made an exception for
fuse-ntfs-3g, so it already as an entry).
2011-11-14 11:53:05 +00:00

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/* $NetBSD: puffs_priv.h,v 1.41 2008/08/11 16:23:37 pooka 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 <ucontext.h>
/* FIXME: fs/puffs/puffs_msgif.h? */
#include "puffs_msgif.h"
#include "puffs.h"
/* XXX: MINIX */
#define IGN_PERM 0
#define CHK_PERM 1
#define SU_UID ((uid_t) 0) /* super_user's uid_t */
/* XXX: MINIX */
#define ATIME 002 /* set if atime field needs updating */
#define CTIME 004 /* set if ctime field needs updating */
#define MTIME 010 /* set if mtime field needs updating */
#define REQ_READ_SUPER 28
#ifdef PUFFS_WITH_THREADS
#include <pthread.h>
extern pthread_mutex_t pu_lock;
#define PU_LOCK() pthread_mutex_lock(&pu_lock)
#define PU_UNLOCK() pthread_mutex_unlock(&pu_lock)
#else
#define PU_LOCK()
#define PU_UNLOCK()
#endif
#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_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_node) pu_pnode_removed_lst;
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_nfds;
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;
};
#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 *);
__END_DECLS
#define NUL(str,l,m) mfs_nul_f(__FILE__,__LINE__,(str), (l), (m))
#endif /* _PUFFS_PRIVATE_H_ */
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