minix/lib/libpuffs/subr.c
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

326 lines
7.5 KiB
C

/* $NetBSD: subr.c,v 1.23 2008/08/12 19:44:39 pooka Exp $ */
/*
* Copyright (c) 2006 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.
*/
#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: subr.c,v 1.23 2008/08/12 19:44:39 pooka Exp $");
#endif /* !lint */
#include <sys/types.h>
#include <sys/dirent.h>
#include <sys/time.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include "puffs.h"
#include "puffs_priv.h"
int
puffs_gendotdent(struct dirent **dent, ino_t id, int dotdot, size_t *reslen)
{
const char *name;
assert(dotdot == 0 || dotdot == 1);
name = dotdot == 0 ? "." : "..";
return puffs_nextdent(dent, name, id, DT_DIR, reslen);
}
int
puffs_nextdent(struct dirent **dent, const char *name, ino_t id, uint8_t dtype,
size_t *reslen)
{
struct dirent *d = *dent;
unsigned int len, reclen;
int o;
char *cp;
/* check if we have enough room for our dent-aligned dirent */
if (_DIRENT_RECLEN(d, strlen(name)) > *reslen)
return 0;
d->d_ino = id;
/* Compute the length of the name */
cp = memchr(name, '\0', NAME_MAX);
if (cp == NULL)
len = NAME_MAX;
else
len = cp - (name);
/* Compute record length */
reclen = offsetof(struct dirent, d_name) + len + 1;
o = (reclen % sizeof(long));
if (o != 0)
reclen += sizeof(long) - o;
/* FIXME: Set d_off?
* dep->d_off =
*/
d->d_reclen = (unsigned short) reclen;
(void)memcpy(d->d_name, name, (size_t)len);
d->d_name[len] = '\0';
*reslen -= d->d_reclen;
*dent = _DIRENT_NEXT(d);
return 1;
}
/*ARGSUSED*/
int
puffs_fsnop_unmount(struct puffs_usermount *dontuse1, int dontuse2)
{
/* would you like to see puffs rule again, my friend? */
return 0;
}
/*ARGSUSED*/
int
puffs_fsnop_sync(struct puffs_usermount *dontuse1, int dontuse2,
const struct puffs_cred *dontuse3)
{
return 0;
}
/*ARGSUSED*/
int
puffs_fsnop_statvfs(struct puffs_usermount *dontuse1, struct statvfs *sbp)
{
/* FIXME: implement me
sbp->f_bsize = sbp->f_frsize = sbp->f_iosize = 512;
sbp->f_bfree=sbp->f_bavail=sbp->f_bresvd=sbp->f_blocks = (fsblkcnt_t)0;
sbp->f_ffree=sbp->f_favail=sbp->f_fresvd=sbp->f_files = (fsfilcnt_t)0;
*/
return 0;
}
/*ARGSUSED3*/
int
puffs_genfs_node_getattr(struct puffs_usermount *pu, puffs_cookie_t opc,
struct vattr *va, const struct puffs_cred *pcr)
{
struct puffs_node *pn = PU_CMAP(pu, opc);
memcpy(va, &pn->pn_va, sizeof(struct vattr));
return 0;
}
/*
* Just put the node, don't do anything else. Don't use this if
* your fs needs more cleanup.
*/
/*ARGSUSED2*/
int
puffs_genfs_node_reclaim(struct puffs_usermount *pu, puffs_cookie_t opc)
{
puffs_pn_put(PU_CMAP(pu, opc));
return 0;
}
/*
* Just a wrapper to make calling the above nicer without having to pass
* NULLs from application code
*/
void
puffs_zerostatvfs(struct statvfs *sbp)
{
puffs_fsnop_statvfs(NULL, sbp);
}
/*
* Set vattr values for those applicable (i.e. not PUFFS_VNOVAL).
*/
void
puffs_setvattr(struct vattr *vap, const struct vattr *sva)
{
#define SETIFVAL(a, t) if (sva->a != (t)PUFFS_VNOVAL) vap->a = sva->a
if (sva->va_type != VNON)
vap->va_type = sva->va_type;
SETIFVAL(va_mode, mode_t);
SETIFVAL(va_nlink, nlink_t);
SETIFVAL(va_uid, uid_t);
SETIFVAL(va_gid, gid_t);
SETIFVAL(va_fsid, long);
SETIFVAL(va_size, u_quad_t);
SETIFVAL(va_fileid, ino_t);
SETIFVAL(va_blocksize, long);
SETIFVAL(va_atime.tv_sec, time_t);
SETIFVAL(va_ctime.tv_sec, time_t);
SETIFVAL(va_mtime.tv_sec, time_t);
SETIFVAL(va_birthtime.tv_sec, time_t);
SETIFVAL(va_atime.tv_nsec, long);
SETIFVAL(va_ctime.tv_nsec, long);
SETIFVAL(va_mtime.tv_nsec, long);
SETIFVAL(va_birthtime.tv_nsec, long);
SETIFVAL(va_gen, u_long);
SETIFVAL(va_flags, u_long);
SETIFVAL(va_rdev, dev_t);
SETIFVAL(va_bytes, u_quad_t);
#undef SETIFVAL
/* ignore va->va_vaflags */
}
void
puffs_vattr_null(struct vattr *vap)
{
vap->va_type = VNON;
/*
* Assign individually so that it is safe even if size and
* sign of each member are varied.
*/
vap->va_mode = (mode_t)PUFFS_VNOVAL;
vap->va_nlink = (nlink_t)PUFFS_VNOVAL;
vap->va_uid = (uid_t)PUFFS_VNOVAL;
vap->va_gid = (gid_t)PUFFS_VNOVAL;
vap->va_fsid = PUFFS_VNOVAL;
vap->va_fileid = (ino_t)PUFFS_VNOVAL;
vap->va_size = (u_quad_t)PUFFS_VNOVAL;
vap->va_blocksize = sysconf(_SC_PAGESIZE);
vap->va_atime.tv_sec =
vap->va_mtime.tv_sec =
vap->va_ctime.tv_sec =
vap->va_birthtime.tv_sec = PUFFS_VNOVAL;
vap->va_atime.tv_nsec =
vap->va_mtime.tv_nsec =
vap->va_ctime.tv_nsec =
vap->va_birthtime.tv_nsec = PUFFS_VNOVAL;
vap->va_rdev = (dev_t)PUFFS_VNOVAL;
vap->va_bytes = (u_quad_t)PUFFS_VNOVAL;
vap->va_flags = 0;
vap->va_gen = 0;
vap->va_vaflags = 0;
}
static int vdmap[] = {
DT_UNKNOWN, /* VNON */
DT_REG, /* VREG */
DT_DIR, /* VDIR */
DT_BLK, /* VBLK */
DT_CHR, /* VCHR */
DT_LNK, /* VLNK */
DT_SOCK, /* VSUCK*/
DT_FIFO, /* VFIFO*/
DT_UNKNOWN /* VBAD */
};
/* XXX: DT_WHT ? */
int
puffs_vtype2dt(enum vtype vt)
{
if ((int)vt >= VNON && vt < (sizeof(vdmap)/sizeof(vdmap[0])))
return vdmap[vt];
return DT_UNKNOWN;
}
enum vtype
puffs_mode2vt(mode_t mode)
{
switch (mode & S_IFMT) {
case S_IFIFO:
return VFIFO;
case S_IFCHR:
return VCHR;
case S_IFDIR:
return VDIR;
case S_IFBLK:
return VBLK;
case S_IFREG:
return VREG;
case S_IFLNK:
return VLNK;
case S_IFSOCK:
return VSOCK;
default:
return VBAD; /* XXX: not really true, but ... */
}
}
void
puffs_stat2vattr(struct vattr *va, const struct stat *sb)
{
va->va_type = puffs_mode2vt(sb->st_mode);
va->va_mode = sb->st_mode;
va->va_nlink = sb->st_nlink;
va->va_uid = sb->st_uid;
va->va_gid = sb->st_gid;
va->va_fsid = sb->st_dev;
va->va_fileid = sb->st_ino;
va->va_size = sb->st_size;
va->va_atime.tv_nsec = va->va_mtime.tv_nsec = va->va_ctime.tv_nsec = 0;
va->va_atime.tv_sec = sb->st_atime;
va->va_ctime.tv_sec = sb->st_ctime;
va->va_mtime.tv_sec = sb->st_mtime;
va->va_blocksize = sb->st_blksize;
va->va_birthtime = sb->st_birthtimespec;
va->va_gen = sb->st_gen;
va->va_flags = sb->st_flags;
va->va_rdev = sb->st_rdev;
va->va_bytes = sb->st_blocks * sb->st_blksize;
va->va_filerev = 0;
va->va_vaflags = 0;
}
mode_t
puffs_addvtype2mode(mode_t mode, enum vtype type)
{
switch (type) {
case VCHR:
mode |= S_IFCHR;
break;
case VBLK:
mode |= S_IFBLK;
break;
default:
break;
}
return mode;
}