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Import a FreeBSD port of the FUSE Linux module.

Browse source 
This has been developed during 2 summer of code mandates and being revived
by gnn recently.
The functionality in this commit mirrors entirely content of fusefs-kmod
port, which doesn't need to be installed anymore for -CURRENT setups.

In order to get some sparse technical notes, please refer to:
http://lists.freebsd.org/pipermail/freebsd-fs/2012-March/013876.html

or to the project branch:
svn://svn.freebsd.org/base/projects/fuse/

which also contains granular history of changes happened during port
refinements. This commit does not came from the branch reintegration
itself because it seems svn is not behaving properly for this functionaly
at the moment.

Partly Sponsored by:		Google, Summer of Code program 2005, 2011
Originally submitted by:	ilya, Csaba Henk <csaba-ml AT creo DOT hu >
In collabouration with:		pho
Tested by:			flo, gnn, Gustau Perez,
				Kevin Oberman <rkoberman AT gmail DOT com>
MFC after:			2 months
This commit is contained in:
Attilio Rao 2012-10-13 23:54:26 +00:00
parent 7ecfabc7bb
commit 5fe580195f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=241519
28 changed files with 9093 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
UPDATING
View file

@ -24,6 +24,9 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
disable the most expensive debugging functionality run
"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
20121014:
Import the FUSE kernel and userland support into base system.
20121013:
The GNU sort(1) program has been removed since the BSD-licensed
sort(1) has been the default for quite some time and no serious

1
sbin/Makefile
View file

@ -49,6 +49,7 @@ SUBDIR=adjkerntz \
mksnap_ffs \
mount \
mount_cd9660 \
mount_fusefs \
mount_msdosfs \
mount_nfs \
mount_ntfs \

33
sbin/mount_fusefs/Makefile Normal file
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@ -0,0 +1,33 @@
# $FreeBSD$
.if defined(DEBUG)
DEBUG_FLAGS+= -D_DEBUG -g
.endif
.if defined(DEBUG2G)
DEBUG_FLAGS+= -D_DEBUG2G -g
.endif
.if defined(DEBUG3G)
DEBUG_FLAGS+= -D_DEBUG3G -g
.endif
.if defined(DEBUG_MSG)
DEBUG_FLAGS+= -D_DEBUG_MSG
.endif
.if defined(F4BVERS)
DEBUG_FLAGS+= -DFUSE4BSD_VERSION="\"${F4BVERS}\""
.endif
PROG= mount_fusefs
SRCS= mount_fusefs.c getmntopts.c
MAN8= mount_fusefs.8
NO_MANCOMPRESS?= yes
MOUNT= ${.CURDIR}/../mount
CFLAGS+= -I${MOUNT}
.PATH: ${MOUNT}
.include <bsd.prog.mk>

363
sbin/mount_fusefs/mount_fusefs.8 Normal file
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@ -0,0 +1,363 @@
.\" Copyright (c) 1980, 1989, 1991, 1993
.\" The Regents of the University of California.
.\" Copyright (c) 2005, 2006 Csaba Henk
.\" 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.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
.\"
.\" $FreeBSD$
.\"
.Dd October 11, 2012
.Dt MOUNT_FUSEFS 8
.Os
.Sh NAME
.Nm mount_fusefs
.Nd mount a Fuse file system daemon
.Sh SYNOPSIS
.Nm
.Op Fl A
.Op Fl S
.Op Fl v
.Op Fl D Ar fuse_daemon
.Op Fl O Ar daemon_opts
.Op Fl s Ar special
.Op Fl m Ar node
.Op Fl h
.Op Fl V
.Op Fl o Ar option ...
.Ar special node
.Op Ar fuse_daemon ...
.Sh DESCRIPTION
Basic usage is to start a fuse daemon on the given
.Ar special
file. In practice, the daemon is assigned a
.Ar special
file automatically, which can then be indentified via
.Xr fstat 1 .
That special file can then be mounted by
.Nm .
.Pp
However, the procedure of spawning a daemon will usually be automated
so that it is performed by
.Nm .
If the command invoking a given
.Ar fuse_daemon
is appended to the list of arguments,
.Nm
will call the
.Ar fuse_daemon
via that command. In that way the
.Ar fuse_daemon
will be instructed to attach itself to
.Ar special .
From that on mounting goes as in the simple case. (See
.Sx DAEMON MOUNTS . )
.Pp
The
.Ar special
argument normally will be treated as the path of the special file to mount.
.Pp
However, if
.Pa auto
is passed as
.Ar special ,
then
.Nm
will look for a suitable free fuse device by itself.
.Pp
Finally, if
.Ar special
is an integer it will be interpreted as the number
of the file descriptor of an already open fuse device
(used when the Fuse library invokes
.Nm .
(See
.Sx DAEMON MOUNTS ) .
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl A , Ic --reject-allow_other
Prohibit the
.Cm allow_other
mount flag. Intended for use in scripts and the
.Xr sudoers 5
file.
.It Fl S , Ic --safe
Run in safe mode (i.e. reject invoking a filesystem daemon)
.It Fl v
Be verbose
.It Fl D, Ic --daemon Ar daemon
Call the specified
.Ar daemon
.It Fl O, Ic --daemon_opts Ar opts
Add
.Ar opts
to the daemon's command line
.It Fl s, Ic --special Ar special
Use
.Ar special
as special
.It Fl m, Ic --mountpath Ar node
Mount on
.Ar node
.It Fl h, Ic --help
Show help
.It Fl V, Ic --version
Show version information
.It Fl o
Mount options are specified via
.Fl o .
The following options are available (and also their negated versions,
by prefixing them with
.Dq no ) :
.Bl -tag -width indent
.It Cm default_permissions
Enable traditional (file mode based) permission checking in kernel
.It Cm allow_other
Do not apply
.Sx STRICT ACCESS POLICY .
Only root can use this option
.It Cm max_read Ns = Ns Ar n
Limit size of read requests to
.Ar n
.It Cm private
Refuse shared mounting of the daemon. This is the default behaviour,
to allow sharing, expicitly use
.Fl o Cm noprivate
.It Cm neglect_shares
Don't refuse unmounting if there are secondary mounts
.It Cm push_symlinks_in
Prefix absolute symlinks with the mountpoint
.El
.Pp
.El
.Pp
Besides the above mount options, there is a set of pseudo-mount options which
are supported by the Fuse library. One can list these by passing
.Fl h
to a Fuse daemon. Most of these options have effect only on the behaviour of
the daemon (that is, their scope is limited to userspace). However,
there are some which do require in-kernel support.
Currently the options supported by the kernel are:
.Bl -tag -width indent
.It Cm direct_io
Bypass the buffer cache system
.It Cm kernel_cache
By default cached buffers of a given file are flushed at each
.Xr open 2 .
This option disables this behaviour
.El
.Sh DAEMON MOUNTS
Usually users don't need to use
.Nm
directly, as the Fuse library enables Fuse daemons to invoke
.Nm .
That is,
.Pp
.Dl fuse_daemon device mountpoint
.Pp
has the same effect as
.Pp
.Dl mount_fusefs auto mountpoint fuse_daemon
.Pp
This is the recommended usage when you want basic usage
(eg, run the daemon at a low privilege level but mount it as root).
.Sh STRICT ACCESS POLICY
The strict access policy for Fuse filesystems lets one to use the filesystem
only if the filesystem daemon has the same credentials (uid, real uid, gid,
real gid) as the user.
.Pp
This is applied for Fuse mounts by default and only root can mount without
the strict access policy (ie. the
.Cm allow_other
mount option).
.Pp
This is to shield users from the daemon
.Dq spying
on their I/O activities.
.Pp
Users might opt to willingly relax strict access policy (as far they
are concerned) by doing their own secondary mount (See
.Sx SHARED MOUNTS ) .
.Sh SHARED MOUNTS
A Fuse daemon can be shared (ie. mounted multiple times).
When doing the first (primary) mount, the spawner and the mounter of the daemon
must have the same uid, or the mounter should be the superuser.
.Pp
After the primary mount is in place, secondary mounts can be done by anyone
unless this feature is disabled by
.Cm private .
The behaviour of a secondary mount is analogous to that of symbolic
links: they redirect all filesystem operations to the primary mount.
.Pp
Doing a secondary mount is like signing an agreement: by this action, the mounter
agrees that the Fuse daemon can trace her I/O activities. From then on
she is not banned from using the filesystem (either via her own mount or
via the primary mount), regardless whether
.Cm allow_other
is used or not.
.Pp
The device name of a secondary mount is the device name of the corresponding
primary mount, followed by a '#' character and the index of the secondary
mount; e.g.
.Pa /dev/fuse0#3 .
.Sh SECURITY
System administrators might want to use a custom mount policy (ie., one going
beyond the
.Va vfs.usermount
sysctl). The primary tool for such purposes is
.Xr sudo 8 .
However, given that
.Nm
is capable of invoking an arbitrary program, one must be careful when doing this.
.Nm
is designed in a way such that it makes that easy. For this purpose,
there are options which disable certain risky features (ie.
.Fl S
and
.Fl A ) ,
and command line parsing is done in a flexible way: mixing options and
non-options is allowed, but processing them stops at the third non-option
argument (after the first two has been utilized as device and mountpoint).
The rest of the command line specifies the daemon and its arguments.
(Alternatively, the daemon, the special and the mount path can be
specified using the respective options.) Note that
.Nm
ignores the environment variable
.Ev POSIXLY_CORRECT
and always behaves as described.
.Pp
In general, to be as scripting /
.Xr sudoers 5
friendly as possible, no information has a fixed
position in the command line, but once a given piece of information is
provided, subsequent arguments/options cannot override it (with the
exception of some non-critical ones).
.Sh ENVIRONMENT
.Bl -tag -width ".Ev MOUNT_FUSEFS_SAFE"
.It Ev MOUNT_FUSEFS_SAFE
This has the same effect as the
.Fl S
option.
.It Ev MOUNT_FUSEFS_VERBOSE
This has the same effect as the
.Fl v
option.
.It Ev MOUNT_FUSEFS_IGNORE_UNKNOWN
If set,
.Nm
will ignore uknown mount options.
.It Ev MOUNT_FUSEFS_CALL_BY_LIB
Adjust behaviour to the needs of the FUSE library. Currently it effects
help output.
.El
.Pp
Although the following variables don't have any effect on
.Nm
itself, they affect the behaviour of fuse daemons:
.Bl -tag -width ".Ev FUSE_DEV_NAME"
.It Ev FUSE_DEV_NAME
Device to attach. If not set, the multiplexer path
.Ar /dev/fuse
is used.
.It Ev FUSE_DEV_FD
File desciptor of an opened Fuse device to use. Overrides
.Ev FUSE_DEV_NAME .
.It Ev FUSE_NO_MOUNT
If set, the library won't attempt to mount the filesystem, even
if a mountpoint argument is supplied.
.El
.Sh FILES
.Bl -tag -width /dev/fuse
.It Pa /dev/fuse
Fuse device with which the kernel and Fuse daemons can communicate.
.It Pa /dev/fuse
The multiplexer path. An
.Xr open 2
performed on it automatically is passed to a free Fuse device by the kernel
(which might be created just for this puprose).
.El
.Sh EXAMPLES
Mount the example filesystem in the Fuse distribution (from its directory):
either
.Pp
.Dl ./fusexmp /mnt/fuse
.Pp
or
.Pp
.Dl mount_fusefs auto /mnt/fuse ./fusexmp
.Pp
Doing the same in two steps, using
.Pa /dev/fuse0 :
.Pp
.Dl FUSE_DEV_NAME=/dev/fuse ./fusexmp &&
.Dl mount_fusefs /dev/fuse /mnt/fuse
.Pp
A script wrapper for fusexmp which ensures that
.Nm
doesn't call any external utility and also provides a hacky
(non race-free) automatic device selection:
.Pp
.Dl #!/bin/sh -e
.Pp
.Dl FUSE_DEV_NAME=/dev/fuse fusexmp
.Dl mount_fusefs -S /dev/fuse /mnt/fuse \(lq$@\(rq
.Sh SEE ALSO
.Xr fstat 1 ,
.Xr mount 8 ,
.Xr umount 8 ,
.Xr sudo 8
.Sh CAVEATS
Secondary mounts should be unmounted via their device name. If an attempt is
made to be unmount them via their filesystem root path, the unmount request
will be forwarded to the primary mount path.
In general, unmounting by device name is less error-prone than by mount path
(although the latter will also work under normal circumstances).
.Pp
If the daemon is specified via the
.Fl D
and
.Fl O
options, it will be invoked via
.Xr system 3 ,
and the daemon's command line will also have an
.Dq &
control operator appended, so that we don't have to wait for its termination.
You should use a simple command line when invoking the daemon via these options.
.Sh HISTORY
.Nm
appears as the part of the FreeBSD implementation of the Fuse userspace filesystem
framework (see http://fuse.sourceforge.net). This user interface is FreeBSD specific.
.Sh BUGS
.Ar special
is treated as a multiplexer if and only if it is literally the same as
.Pa auto
or
.Pa /dev/fuse .
Other paths which are equivalent with
.Pa /dev/fuse
(eg.,
.Pa /../dev/fuse )
are not.

504
sbin/mount_fusefs/mount_fusefs.c Normal file
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@ -0,0 +1,504 @@
/*-
* Copyright (c) 2005 Jean-Sebastien Pedron
* Copyright (c) 2005 Csaba Henk
* 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 AND CONTRIBUTORS ``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>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <getopt.h>
#include <libgen.h>
#include <limits.h>
#include <osreldate.h>
#include <paths.h>
#include "mntopts.h"
#ifndef FUSE4BSD_VERSION
#define FUSE4BSD_VERSION "0.3.9-pre1"
#endif
void __usage_short(void);
void usage(void);
void helpmsg(void);
void showversion(void);
int init_backgrounded(void);
struct mntopt mopts[] = {
#define ALTF_PRIVATE 0x01
{ "private", 0, ALTF_PRIVATE, 1 },
{ "neglect_shares", 0, 0x02, 1 },
{ "push_symlinks_in", 0, 0x04, 1 },
{ "allow_other", 0, 0x08, 1 },
{ "default_permissions", 0, 0x10, 1 },
#define ALTF_MAXREAD 0x20
{ "max_read=", 0, ALTF_MAXREAD, 1 },
#define ALTF_SUBTYPE 0x40
{ "subtype=", 0, ALTF_SUBTYPE, 1 },
#define ALTF_SYNC_UNMOUNT 0x80
{ "sync_unmount", 0, ALTF_SYNC_UNMOUNT, 1 },
/* Linux specific options, we silently ignore them */
{ "fsname=", 0, 0x00, 1 },
{ "fd=", 0, 0x00, 1 },
{ "rootmode=", 0, 0x00, 1 },
{ "user_id=", 0, 0x00, 1 },
{ "group_id=", 0, 0x00, 1 },
{ "large_read", 0, 0x00, 1 },
/* "nonempty", just the first two chars are stripped off during parsing */
{ "nempty", 0, 0x00, 1 },
MOPT_STDOPTS,
MOPT_END
};
struct mntval {
int mv_flag;
void *mv_value;
int mv_len;
};
struct mntval mvals[] = {
{ ALTF_MAXREAD, NULL, 0 },
{ ALTF_SUBTYPE, NULL, 0 },
{ 0, NULL, 0 }
};
char *progname;
#define DEFAULT_MOUNT_FLAGS ALTF_PRIVATE | ALTF_SYNC_UNMOUNT
int
main(int argc, char *argv[])
{
struct iovec *iov;
char ch = '\0';
int mntflags, iovlen, verbose = 0;
char *dev = NULL, *dir = NULL, mntpath[MAXPATHLEN];
char *devo = NULL, *diro = NULL;
char ndev[128], fdstr[15];
int i, done = 0, reject_allow_other = 0, safe_level = 0;
int altflags = DEFAULT_MOUNT_FLAGS;
int __altflags = DEFAULT_MOUNT_FLAGS;
struct mntopt *mo;
struct mntval *mv;
static struct option longopts[] = {
{"reject-allow_other", no_argument, NULL, 'A'},
{"safe", no_argument, NULL, 'S'},
{"daemon", required_argument, NULL, 'D'},
{"daemon_opts", required_argument, NULL, 'O'},
{"special", required_argument, NULL, 's'},
{"mountpath", required_argument, NULL, 'm'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{0,0,0,0}
};
int pid = 0;
int fd = -1, fdx;
char *ep;
char *daemon_str = NULL, *daemon_opts = NULL;
progname = argv[0];
/*
* We want a parsing routine which is not sensitive to
* the position of args/opts; it should extract the
* first two args and stop at the beginning of the rest.
* (This makes it easier to call mount_fusefs from external
* utils than it is with a strict "util flags args" syntax.)
*/
iov = NULL;
iovlen = 0;
mntflags = 0;
/* All in all, I feel it more robust this way... */
unsetenv("POSIXLY_CORRECT");
if (getenv("MOUNT_FUSEFS_IGNORE_UNKNOWN"))
getmnt_silent = 1;
if (getenv("MOUNT_FUSEFS_VERBOSE"))
verbose = 1;
do {
for (i = 0; i < 3; i++) {
if (optind < argc && argv[optind][0] != '-') {
if (dir) {
done = 1;
break;
}
if (dev)
dir = argv[optind];
else
dev = argv[optind];
optind++;
}
}
switch(ch) {
case 'A':
reject_allow_other = 1;
break;
case 'S':
safe_level = 1;
break;
case 'D':
if (daemon_str)
errx(1, "daemon specified inconsistently");
daemon_str = optarg;
break;
case 'O':
if (daemon_opts)
errx(1, "daemon opts specified inconsistently");
daemon_opts = optarg;
break;
case 'o':
getmntopts(optarg, mopts, &mntflags, &altflags);
for (mv = mvals; mv->mv_flag; ++mv) {
if (! (altflags & mv->mv_flag))
continue;
for (mo = mopts; mo->m_flag; ++mo) {
char *p, *q;
if (mo->m_flag != mv->mv_flag)
continue;
p = strstr(optarg, mo->m_option);
if (p) {
p += strlen(mo->m_option);
q = p;
while (*q != '\0' && *q != ',')
q++;
mv->mv_len = q - p + 1;
mv->mv_value = malloc(mv->mv_len);
memcpy(mv->mv_value, p, mv->mv_len - 1);
((char *)mv->mv_value)[mv->mv_len - 1] = '\0';
break;
}
}
}
break;
case 's':
if (devo)
errx(1, "special specified inconsistently");
devo = optarg;
break;
case 'm':
if (diro)
errx(1, "mount path specified inconsistently");
diro = optarg;
break;
case 'v':
verbose = 1;
break;
case 'h':
helpmsg();
break;
case 'V':
showversion();
break;
case '\0':
break;
case '?':
default:
usage();
}
if (done)
break;
} while ((ch = getopt_long(argc, argv, "AvVho:SD:O:s:m:", longopts, NULL)) != -1);
argc -= optind;
argv += optind;
if (devo) {
if (dev)
errx(1, "special specified inconsistently");
dev = devo;
} else if (diro)
errx(1, "if mountpoint is given via an option, special should also be given via an option");
if (diro) {
if (dir)
errx(1, "mount path specified inconsistently");
dir = diro;
}
if ((! dev) && argc > 0) {
dev = *argv++;
argc--;
}
if ((! dir) && argc > 0) {
dir = *argv++;
argc--;
}
if (! (dev && dir))
errx(1, "missing special and/or mountpoint");
for (mo = mopts; mo->m_flag; ++mo) {
if (altflags & mo->m_flag) {
int iov_done = 0;
if (reject_allow_other &&
strcmp(mo->m_option, "allow_other") == 0)
/*
* reject_allow_other is stronger than a
* negative of allow_other: if this is set,
* allow_other is blocked, period.
*/
errx(1, "\"allow_other\" usage is banned by respective option");
for (mv = mvals; mv->mv_flag; ++mv) {
if (mo->m_flag != mv->mv_flag)
continue;
if (mv->mv_value) {
build_iovec(&iov, &iovlen, mo->m_option, mv->mv_value, mv->mv_len);
iov_done = 1;
break;
}
}
if (! iov_done)
build_iovec(&iov, &iovlen, mo->m_option,
__DECONST(void *, ""), -1);
}
if (__altflags & mo->m_flag) {
char *uscore_opt;
if (asprintf(&uscore_opt, "__%s", mo->m_option) == -1)
err(1, "failed to allocate memory");
build_iovec(&iov, &iovlen, uscore_opt,
__DECONST(void *, ""), -1);
free(uscore_opt);
}
}
if (getenv("MOUNT_FUSEFS_SAFE"))
safe_level = 1;
if (safe_level > 0 && (argc > 0 || daemon_str || daemon_opts))
errx(1, "safe mode, spawning daemon not allowed");
if ((argc > 0 && (daemon_str || daemon_opts)) ||
(daemon_opts && ! daemon_str))
errx(1, "daemon specified inconsistently");
/*
* Resolve the mountpoint with realpath(3) and remove unnecessary
* slashes from the devicename if there are any.
*/
if (checkpath(dir, mntpath) != 0)
err(1, "%s", mntpath);
(void)rmslashes(dev, dev);
if (strcmp(dev, "auto") == 0)
dev = __DECONST(char *, "/dev/fuse");
if (strcmp(dev, "/dev/fuse") == 0) {
if (! (argc > 0 || daemon_str)) {
fprintf(stderr, "Please also specify the fuse daemon to run when mounting via the multiplexer!\n");
usage();
}
if ((fd = open(dev, O_RDWR)) < 0)
err(1, "failed to open fuse device");
} else {
fdx = strtol(dev, &ep, 10);
if (*ep == '\0')
fd = fdx;
}
/* Identifying device */
if (fd >= 0) {
struct stat sbuf;
char *ndevbas, *lep;
if (fstat(fd, &sbuf) == -1)
err(1, "cannot stat device file descriptor");
strcpy(ndev, _PATH_DEV);
ndevbas = ndev + strlen(_PATH_DEV);
devname_r(sbuf.st_rdev, S_IFCHR, ndevbas,
sizeof(ndev) - strlen(_PATH_DEV));
if (strncmp(ndevbas, "fuse", 4))
errx(1, "mounting inappropriate device");
strtol(ndevbas + 4, &lep, 10);
if (*lep != '\0')
errx(1, "mounting inappropriate device");
dev = ndev;
}
if (argc > 0 || daemon_str) {
char *fds;
if (fd < 0 && (fd = open(dev, O_RDWR)) < 0)
err(1, "failed to open fuse device");
if (asprintf(&fds, "%d", fd) == -1)
err(1, "failed to allocate memory");
setenv("FUSE_DEV_FD", fds, 1);
free(fds);
setenv("FUSE_NO_MOUNT", "1", 1);
if (daemon_str) {
char *bgdaemon;
int len;
if (! daemon_opts)
daemon_opts = __DECONST(char *, "");
len = strlen(daemon_str) + 1 + strlen(daemon_opts) +
2 + 1;
bgdaemon = calloc(1, len);
if (! bgdaemon)
err(1, "failed to allocate memory");
strlcpy(bgdaemon, daemon_str, len);
strlcat(bgdaemon, " ", len);
strlcat(bgdaemon, daemon_opts, len);
strlcat(bgdaemon, " &", len);
if (system(bgdaemon))
err(1, "failed to call fuse daemon");
} else {
if ((pid = fork()) < 0)
err(1, "failed to fork for fuse daemon");
if (pid == 0) {
execvp(argv[0], argv);
err(1, "failed to exec fuse daemon");
}
}
}
if (fd >= 0 && ! init_backgrounded() && close(fd) < 0) {
if (pid)
kill(pid, SIGKILL);
err(1, "failed to close fuse device");
}
/* Prepare the options vector for nmount(). build_iovec() is declared
* in mntopts.h. */
sprintf(fdstr, "%d", fd);
build_iovec(&iov, &iovlen, "fstype", __DECONST(void *, "fusefs"), -1);
build_iovec(&iov, &iovlen, "fspath", mntpath, -1);
build_iovec(&iov, &iovlen, "from", dev, -1);
build_iovec(&iov, &iovlen, "fd", fdstr, -1);
if (verbose)
fprintf(stderr, "mounting fuse daemon on device %s\n", dev);
if (nmount(iov, iovlen, mntflags) < 0)
err(EX_OSERR, "%s on %s", dev, mntpath);
exit(0);
}
void
__usage_short(void) {
fprintf(stderr,
"usage:\n%s [-A|-S|-v|-V|-h|-D daemon|-O args|-s special|-m node|-o option...] special node [daemon args...]\n\n",
basename(progname));
}
void
usage(void)
{
struct mntopt *mo;
__usage_short();
fprintf(stderr, "known options:\n");
for (mo = mopts; mo->m_flag; ++mo)
fprintf(stderr, "\t%s\n", mo->m_option);
fprintf(stderr, "\n(use -h for a detailed description of these options)\n");
exit(EX_USAGE);
}
void
helpmsg(void)
{
if (! getenv("MOUNT_FUSEFS_CALL_BY_LIB")) {
__usage_short();
fprintf(stderr, "description of options:\n");
}
/*
* The main use case of this function is giving info embedded in general
* FUSE lib help output. Therefore the style and the content of the output
* tries to fit there as much as possible.
*/
fprintf(stderr,
" -o allow_other allow access to other users\n"
/* " -o nonempty allow mounts over non-empty file/dir\n" */
" -o default_permissions enable permission checking by kernel\n"
/*
" -o fsname=NAME set filesystem name\n"
" -o large_read issue large read requests (2.4 only)\n"
*/
" -o subtype=NAME set filesystem type\n"
" -o max_read=N set maximum size of read requests\n"
" -o noprivate allow secondary mounting of the filesystem\n"
" -o neglect_shares don't report EBUSY when unmount attempted\n"
" in presence of secondary mounts\n"
" -o push_symlinks_in prefix absolute symlinks with mountpoint\n"
" -o sync_unmount do unmount synchronously\n"
);
exit(EX_USAGE);
}
void
showversion(void)
{
puts("mount_fusefs [fuse4bsd] version: " FUSE4BSD_VERSION);
exit(EX_USAGE);
}
int
init_backgrounded(void)
{
int ibg;
size_t len;
len = sizeof(ibg);
if (sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
return (0);
return (ibg);
}

1
sys/conf/NOTES
View file

@ -1003,6 +1003,7 @@ options NFSCLIENT #Network File System client
# The rest are optional:
options CD9660 #ISO 9660 filesystem
options FDESCFS #File descriptor filesystem
options FUSE #FUSE support module
options HPFS #OS/2 File system
options MSDOSFS #MS DOS File System (FAT, FAT32)
options NFSSERVER #Network File System server

9
sys/conf/files
View file

@ -2317,6 +2317,15 @@ fs/devfs/devfs_vnops.c standard
fs/fdescfs/fdesc_vfsops.c optional fdescfs
fs/fdescfs/fdesc_vnops.c optional fdescfs
fs/fifofs/fifo_vnops.c standard
fs/fuse/fuse_device.c optional fuse
fs/fuse/fuse_file.c optional fuse
fs/fuse/fuse_internal.c optional fuse
fs/fuse/fuse_io.c optional fuse
fs/fuse/fuse_ipc.c optional fuse
fs/fuse/fuse_main.c optional fuse
fs/fuse/fuse_node.c optional fuse
fs/fuse/fuse_vfsops.c optional fuse
fs/fuse/fuse_vnops.c optional fuse
fs/hpfs/hpfs_alsubr.c optional hpfs
fs/hpfs/hpfs_lookup.c optional hpfs
fs/hpfs/hpfs_subr.c optional hpfs

1
sys/conf/options
View file

@ -211,6 +211,7 @@ CODA opt_dontuse.h
EXT2FS opt_dontuse.h
FDESCFS opt_dontuse.h
FFS opt_dontuse.h
FUSE opt_dontuse.h
HPFS opt_dontuse.h
MSDOSFS opt_dontuse.h
NANDFS opt_dontuse.h

223
sys/fs/fuse/fuse.h Normal file
View file

@ -0,0 +1,223 @@
/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#include "fuse_kernel.h"
#define FUSE_DEFAULT_DAEMON_TIMEOUT 60 /* s */
#define FUSE_MIN_DAEMON_TIMEOUT 0 /* s */
#define FUSE_MAX_DAEMON_TIMEOUT 600 /* s */
#ifndef FUSE_FREEBSD_VERSION
#define FUSE_FREEBSD_VERSION "0.4.4"
#endif
/* Mapping versions to features */
#define FUSE_KERNELABI_GEQ(maj, min) \
(FUSE_KERNEL_VERSION > (maj) || (FUSE_KERNEL_VERSION == (maj) && FUSE_KERNEL_MINOR_VERSION >= (min)))
/*
* Appearance of new FUSE operations is not always in par with version
* numbering... At least, 7.3 is a sufficient condition for having
* FUSE_{ACCESS,CREATE}.
*/
#if FUSE_KERNELABI_GEQ(7, 3)
#ifndef FUSE_HAS_ACCESS
#define FUSE_HAS_ACCESS 1
#endif
#ifndef FUSE_HAS_CREATE
#define FUSE_HAS_CREATE 1
#endif
#else /* FUSE_KERNELABI_GEQ(7, 3) */
#ifndef FUSE_HAS_ACCESS
#define FUSE_HAS_ACCESS 0
#endif
#ifndef FUSE_HAS_CREATE
#define FUSE_HAS_CREATE 0
#endif
#endif
#if FUSE_KERNELABI_GEQ(7, 7)
#ifndef FUSE_HAS_GETLK
#define FUSE_HAS_GETLK 1
#endif
#ifndef FUSE_HAS_SETLK
#define FUSE_HAS_SETLK 1
#endif
#ifndef FUSE_HAS_SETLKW
#define FUSE_HAS_SETLKW 1
#endif
#ifndef FUSE_HAS_INTERRUPT
#define FUSE_HAS_INTERRUPT 1
#endif
#else /* FUSE_KERNELABI_GEQ(7, 7) */
#ifndef FUSE_HAS_GETLK
#define FUSE_HAS_GETLK 0
#endif
#ifndef FUSE_HAS_SETLK
#define FUSE_HAS_SETLK 0
#endif
#ifndef FUSE_HAS_SETLKW
#define FUSE_HAS_SETLKW 0
#endif
#ifndef FUSE_HAS_INTERRUPT
#define FUSE_HAS_INTERRUPT 0
#endif
#endif
#if FUSE_KERNELABI_GEQ(7, 8)
#ifndef FUSE_HAS_FLUSH_RELEASE
#define FUSE_HAS_FLUSH_RELEASE 1
/*
* "DESTROY" came in the middle of the 7.8 era,
* so this is not completely exact...
*/
#ifndef FUSE_HAS_DESTROY
#define FUSE_HAS_DESTROY 1
#endif
#endif
#else /* FUSE_KERNELABI_GEQ(7, 8) */
#ifndef FUSE_HAS_FLUSH_RELEASE
#define FUSE_HAS_FLUSH_RELEASE 0
#ifndef FUSE_HAS_DESTROY
#define FUSE_HAS_DESTROY 0
#endif
#endif
#endif
/* misc */
SYSCTL_DECL(_vfs_fuse);
/* Fuse locking */
extern struct mtx fuse_mtx;
#define FUSE_LOCK() fuse_lck_mtx_lock(fuse_mtx)
#define FUSE_UNLOCK() fuse_lck_mtx_unlock(fuse_mtx)
#define RECTIFY_TDCR(td, cred) \
do { \
if (! (td)) \
(td) = curthread; \
if (! (cred)) \
(cred) = (td)->td_ucred; \
} while (0)
/* Debug related stuff */
#ifndef FUSE_DEBUG_DEVICE
#define FUSE_DEBUG_DEVICE 0
#endif
#ifndef FUSE_DEBUG_FILE
#define FUSE_DEBUG_FILE 0
#endif
#ifndef FUSE_DEBUG_INTERNAL
#define FUSE_DEBUG_INTERNAL 0
#endif
#ifndef FUSE_DEBUG_IO
#define FUSE_DEBUG_IO 0
#endif
#ifndef FUSE_DEBUG_IPC
#define FUSE_DEBUG_IPC 0
#endif
#ifndef FUSE_DEBUG_LOCK
#define FUSE_DEBUG_LOCK 0
#endif
#ifndef FUSE_DEBUG_VFSOPS
#define FUSE_DEBUG_VFSOPS 0
#endif
#ifndef FUSE_DEBUG_VNOPS
#define FUSE_DEBUG_VNOPS 0
#endif
#ifndef FUSE_TRACE
#define FUSE_TRACE 0
#endif
#define DEBUGX(cond, fmt, ...) do { \
if (((cond))) { \
printf("%s: " fmt, __func__, ## __VA_ARGS__); \
} } while (0)
#define fuse_lck_mtx_lock(mtx) do { \
DEBUGX(FUSE_DEBUG_LOCK, "0: lock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
mtx_lock(&(mtx)); \
DEBUGX(FUSE_DEBUG_LOCK, "1: lock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
} while (0)
#define fuse_lck_mtx_unlock(mtx) do { \
DEBUGX(FUSE_DEBUG_LOCK, "0: unlock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
mtx_unlock(&(mtx)); \
DEBUGX(FUSE_DEBUG_LOCK, "1: unlock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
} while (0)
void fuse_ipc_init(void);
void fuse_ipc_destroy(void);
int fuse_device_init(void);
void fuse_device_destroy(void);

79
sys/fs/fuse/fuse_debug.h Normal file
View file

@ -0,0 +1,79 @@
/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
/* Debug related stuff */
#ifndef FUSE_DEBUG_MODULE
#error "FUSE_DEBUG_MODULE is not defined"
#else
#define FUSE_DEBUG_VAR __CONCAT(FUSE_DEBUG_,FUSE_DEBUG_MODULE)
#endif
#define DEBUG(fmt, ...) DEBUGX(FUSE_DEBUG_VAR >= 1, fmt, ## __VA_ARGS__)
#define DEBUG2G(fmt, ...) DEBUGX(FUSE_DEBUG_VAR >= 2, fmt, ## __VA_ARGS__)
#define debug_printf(fmt, ...) DEBUG(fmt, ## __VA_ARGS__)
#define kdebug_printf(fmt, ...) DEBUG(fmt, ## __VA_ARGS__)
#define fuse_trace_printf(fmt, ...) \
DEBUGX(FUSE_DEBUG_VAR && FUSE_TRACE, fmt, ## __VA_ARGS__)
#define fuse_trace_printf_func() \
fuse_trace_printf("%s:%d\n", __FILE__, __LINE__)
#define fuse_trace_printf_vfsop() fuse_trace_printf_func()
#define fuse_trace_printf_vnop() fuse_trace_printf_func()

447
sys/fs/fuse/fuse_device.c Normal file
View file

@ -0,0 +1,447 @@
/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <sys/sysctl.h>
#include <sys/poll.h>
#include <sys/selinfo.h>
#include "fuse.h"
#include "fuse_ipc.h"
#define FUSE_DEBUG_MODULE DEVICE
#include "fuse_debug.h"
static struct cdev *fuse_dev;
static d_open_t fuse_device_open;
static d_close_t fuse_device_close;
static d_poll_t fuse_device_poll;
static d_read_t fuse_device_read;
static d_write_t fuse_device_write;
static struct cdevsw fuse_device_cdevsw = {
.d_open = fuse_device_open,
.d_close = fuse_device_close,
.d_name = "fuse",
.d_poll = fuse_device_poll,
.d_read = fuse_device_read,
.d_write = fuse_device_write,
.d_version = D_VERSION,
.d_flags = D_NEEDMINOR,
};
/****************************
*
* >>> Fuse device op defs
*
****************************/
static void
fdata_dtor(void *arg)
{
struct fuse_data *fdata;
fdata = arg;
fdata_trydestroy(fdata);
}
/*
* Resources are set up on a per-open basis
*/
static int
fuse_device_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
struct fuse_data *fdata;
int error;
DEBUG("device %p\n", dev);
fdata = fdata_alloc(dev, td->td_ucred);
error = devfs_set_cdevpriv(fdata, fdata_dtor);
if (error != 0)
fdata_trydestroy(fdata);
else
DEBUG("%s: device opened by thread %d.\n", dev->si_name,
td->td_tid);
return (error);
}
static int
fuse_device_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
struct fuse_data *data;
struct fuse_ticket *tick;
int error;
error = devfs_get_cdevpriv((void **)&data);
if (error != 0)
return (error);
if (!data)
panic("no fuse data upon fuse device close");
fdata_set_dead(data);
FUSE_LOCK();
fuse_lck_mtx_lock(data->aw_mtx);
/* wakup poll()ers */
selwakeuppri(&data->ks_rsel, PZERO + 1);
/* Don't let syscall handlers wait in vain */
while ((tick = fuse_aw_pop(data))) {
fuse_lck_mtx_lock(tick->tk_aw_mtx);
fticket_set_answered(tick);
tick->tk_aw_errno = ENOTCONN;
wakeup(tick);
fuse_lck_mtx_unlock(tick->tk_aw_mtx);
FUSE_ASSERT_AW_DONE(tick);
fuse_ticket_drop(tick);
}
fuse_lck_mtx_unlock(data->aw_mtx);
FUSE_UNLOCK();
DEBUG("%s: device closed by thread %d.\n", dev->si_name, td->td_tid);
return (0);
}
int
fuse_device_poll(struct cdev *dev, int events, struct thread *td)
{
struct fuse_data *data;
int error, revents = 0;
error = devfs_get_cdevpriv((void **)&data);
if (error != 0)
return (events &
(POLLHUP|POLLIN|POLLRDNORM|POLLOUT|POLLWRNORM));
if (events & (POLLIN | POLLRDNORM)) {
fuse_lck_mtx_lock(data->ms_mtx);
if (fdata_get_dead(data) || STAILQ_FIRST(&data->ms_head))
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(td, &data->ks_rsel);
fuse_lck_mtx_unlock(data->ms_mtx);
}
if (events & (POLLOUT | POLLWRNORM)) {
revents |= events & (POLLOUT | POLLWRNORM);
}
return (revents);
}
/*
* fuse_device_read hangs on the queue of VFS messages.
* When it's notified that there is a new one, it picks that and
* passes up to the daemon
*/
int
fuse_device_read(struct cdev *dev, struct uio *uio, int ioflag)
{
int err;
struct fuse_data *data;
struct fuse_ticket *tick;
void *buf[] = {NULL, NULL, NULL};
int buflen[3];
int i;
DEBUG("fuse device being read on thread %d\n", uio->uio_td->td_tid);
err = devfs_get_cdevpriv((void **)&data);
if (err != 0)
return (err);
fuse_lck_mtx_lock(data->ms_mtx);
again:
if (fdata_get_dead(data)) {
DEBUG2G("we know early on that reader should be kicked so we don't wait for news\n");
fuse_lck_mtx_unlock(data->ms_mtx);
return (ENODEV);
}
if (!(tick = fuse_ms_pop(data))) {
/* check if we may block */
if (ioflag & O_NONBLOCK) {
/* get outa here soon */
fuse_lck_mtx_unlock(data->ms_mtx);
return (EAGAIN);
} else {
err = msleep(data, &data->ms_mtx, PCATCH, "fu_msg", 0);
if (err != 0) {
fuse_lck_mtx_unlock(data->ms_mtx);
return (fdata_get_dead(data) ? ENODEV : err);
}
tick = fuse_ms_pop(data);
}
}
if (!tick) {
/*
* We can get here if fuse daemon suddenly terminates,
* eg, by being hit by a SIGKILL
* -- and some other cases, too, tho not totally clear, when
* (cv_signal/wakeup_one signals the whole process ?)
*/
DEBUG("no message on thread #%d\n", uio->uio_td->td_tid);
goto again;
}
fuse_lck_mtx_unlock(data->ms_mtx);
if (fdata_get_dead(data)) {
/*
* somebody somewhere -- eg., umount routine --
* wants this liaison finished off
*/
DEBUG2G("reader is to be sacked\n");
if (tick) {
DEBUG2G("weird -- \"kick\" is set tho there is message\n");
FUSE_ASSERT_MS_DONE(tick);
fuse_ticket_drop(tick);
}
return (ENODEV); /* This should make the daemon get off
* of us */
}
DEBUG("message got on thread #%d\n", uio->uio_td->td_tid);
KASSERT(tick->tk_ms_bufdata || tick->tk_ms_bufsize == 0,
("non-null buf pointer with positive size"));
switch (tick->tk_ms_type) {
case FT_M_FIOV:
buf[0] = tick->tk_ms_fiov.base;
buflen[0] = tick->tk_ms_fiov.len;
break;
case FT_M_BUF:
buf[0] = tick->tk_ms_fiov.base;
buflen[0] = tick->tk_ms_fiov.len;
buf[1] = tick->tk_ms_bufdata;
buflen[1] = tick->tk_ms_bufsize;
break;
default:
panic("unknown message type for fuse_ticket %p", tick);
}
for (i = 0; buf[i]; i++) {
/*
* Why not ban mercilessly stupid daemons who can't keep up
* with us? (There is no much use of a partial read here...)
*/
/*
* XXX note that in such cases Linux FUSE throws EIO at the
* syscall invoker and stands back to the message queue. The
* rationale should be made clear (and possibly adopt that
* behaviour). Keeping the current scheme at least makes
* fallacy as loud as possible...
*/
if (uio->uio_resid < buflen[i]) {
fdata_set_dead(data);
DEBUG2G("daemon is stupid, kick it off...\n");
err = ENODEV;
break;
}
err = uiomove(buf[i], buflen[i], uio);
if (err)
break;
}
FUSE_ASSERT_MS_DONE(tick);
fuse_ticket_drop(tick);
return (err);
}
static __inline int
fuse_ohead_audit(struct fuse_out_header *ohead, struct uio *uio)
{
DEBUG("Out header -- len: %i, error: %i, unique: %llu; iovecs: %d\n",
ohead->len, ohead->error, (unsigned long long)ohead->unique,
uio->uio_iovcnt);
if (uio->uio_resid + sizeof(struct fuse_out_header) != ohead->len) {
DEBUG("Format error: body size differs from size claimed by header\n");
return (EINVAL);
}
if (uio->uio_resid && ohead->error) {
DEBUG("Format error: non zero error but message had a body\n");
return (EINVAL);
}
/* Sanitize the linuxism of negative errnos */
ohead->error = -(ohead->error);
return (0);
}
/*
* fuse_device_write first reads the header sent by the daemon.
* If that's OK, looks up ticket/callback node by the unique id seen in header.
* If the callback node contains a handler function, the uio is passed over
* that.
*/
static int
fuse_device_write(struct cdev *dev, struct uio *uio, int ioflag)
{
struct fuse_out_header ohead;
int err = 0;
struct fuse_data *data;
struct fuse_ticket *tick, *x_tick;
int found = 0;
DEBUG("resid: %zd, iovcnt: %d, thread: %d\n",
uio->uio_resid, uio->uio_iovcnt, uio->uio_td->td_tid);
err = devfs_get_cdevpriv((void **)&data);
if (err != 0)
return (err);
if (uio->uio_resid < sizeof(struct fuse_out_header)) {
DEBUG("got less than a header!\n");
fdata_set_dead(data);
return (EINVAL);
}
if ((err = uiomove(&ohead, sizeof(struct fuse_out_header), uio)) != 0)
return (err);
/*
* We check header information (which is redundant) and compare it
* with what we see. If we see some inconsistency we discard the
* whole answer and proceed on as if it had never existed. In
* particular, no pretender will be woken up, regardless the
* "unique" value in the header.
*/
if ((err = fuse_ohead_audit(&ohead, uio))) {
fdata_set_dead(data);
return (err);
}
/* Pass stuff over to callback if there is one installed */
/* Looking for ticket with the unique id of header */
fuse_lck_mtx_lock(data->aw_mtx);
TAILQ_FOREACH_SAFE(tick, &data->aw_head, tk_aw_link,
x_tick) {
DEBUG("bumped into callback #%llu\n",
(unsigned long long)tick->tk_unique);
if (tick->tk_unique == ohead.unique) {
found = 1;
fuse_aw_remove(tick);
break;
}
}
fuse_lck_mtx_unlock(data->aw_mtx);
if (found) {
if (tick->tk_aw_handler) {
/*
* We found a callback with proper handler. In this
* case the out header will be 0wnd by the callback,
* so the fun of freeing that is left for her.
* (Then, by all chance, she'll just get that's done
* via ticket_drop(), so no manual mucking
* around...)
*/
DEBUG("pass ticket to a callback\n");
memcpy(&tick->tk_aw_ohead, &ohead, sizeof(ohead));
err = tick->tk_aw_handler(tick, uio);
} else {
/* pretender doesn't wanna do anything with answer */
DEBUG("stuff devalidated, so we drop it\n");
}
/*
* As aw_mtx was not held during the callback execution the
* ticket may have been inserted again. However, this is safe
* because fuse_ticket_drop() will deal with refcount anyway.
*/
fuse_ticket_drop(tick);
} else {
/* no callback at all! */
DEBUG("erhm, no handler for this response\n");
err = EINVAL;
}
return (err);
}
int
fuse_device_init(void)
{
fuse_dev = make_dev(&fuse_device_cdevsw, 0, UID_ROOT, GID_OPERATOR,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, "fuse");
if (fuse_dev == NULL)
return (ENOMEM);
return (0);
}
void
fuse_device_destroy(void)
{
MPASS(fuse_dev != NULL);
destroy_dev(fuse_dev);
}

260
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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/sysctl.h>
#include "fuse.h"
#include "fuse_file.h"
#include "fuse_internal.h"
#include "fuse_ipc.h"
#include "fuse_node.h"
#define FUSE_DEBUG_MODULE FILE
#include "fuse_debug.h"
static int fuse_fh_count = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, filehandle_count, CTLFLAG_RD,
&fuse_fh_count, 0, "");
int
fuse_filehandle_open(struct vnode *vp,
fufh_type_t fufh_type,
struct fuse_filehandle **fufhp,
struct thread *td,
struct ucred *cred)
{
struct fuse_dispatcher fdi;
struct fuse_open_in *foi;
struct fuse_open_out *foo;
int err = 0;
int isdir = 0;
int oflags = 0;
int op = FUSE_OPEN;
fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
vp, fufh_type);
if (fuse_filehandle_valid(vp, fufh_type)) {
panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
fufh_type);
/* NOTREACHED */
}
/*
* Note that this means we are effectively FILTERING OUT open() flags.
*/
oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
if (vnode_isdir(vp)) {
isdir = 1;
op = FUSE_OPENDIR;
if (fufh_type != FUFH_RDONLY) {
printf("FUSE:non-rdonly fh requested for a directory?\n");
fufh_type = FUFH_RDONLY;
}
}
fdisp_init(&fdi, sizeof(*foi));
fdisp_make_vp(&fdi, op, vp, td, cred);
foi = fdi.indata;
foi->flags = oflags;
if ((err = fdisp_wait_answ(&fdi))) {
debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
if (err == ENOENT) {
fuse_internal_vnode_disappear(vp);
}
goto out;
}
foo = fdi.answ;
fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
fuse_vnode_open(vp, foo->open_flags, td);
out:
fdisp_destroy(&fdi);
return err;
}
int
fuse_filehandle_close(struct vnode *vp,
fufh_type_t fufh_type,
struct thread *td,
struct ucred *cred)
{
struct fuse_dispatcher fdi;
struct fuse_release_in *fri;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh = NULL;
int err = 0;
int isdir = 0;
int op = FUSE_RELEASE;
fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
vp, fufh_type);
fufh = &(fvdat->fufh[fufh_type]);
if (!FUFH_IS_VALID(fufh)) {
panic("FUSE: filehandle_put called on invalid fufh (type=%d)",
fufh_type);
/* NOTREACHED */
}
if (fuse_isdeadfs(vp)) {
goto out;
}
if (vnode_isdir(vp)) {
op = FUSE_RELEASEDIR;
isdir = 1;
}
fdisp_init(&fdi, sizeof(*fri));
fdisp_make_vp(&fdi, op, vp, td, cred);
fri = fdi.indata;
fri->fh = fufh->fh_id;
fri->flags = fuse_filehandle_xlate_to_oflags(fufh_type);
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
out:
atomic_subtract_acq_int(&fuse_fh_count, 1);
fufh->fh_id = (uint64_t)-1;
fufh->fh_type = FUFH_INVALID;
fuse_invalidate_attr(vp);
return err;
}
int
fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh;
fufh = &(fvdat->fufh[fufh_type]);
return FUFH_IS_VALID(fufh);
}
int
fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh;
fufh = &(fvdat->fufh[fufh_type]);
if (!FUFH_IS_VALID(fufh))
return EBADF;
if (fufhp != NULL)
*fufhp = fufh;
return 0;
}
int
fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh;
fufh = &(fvdat->fufh[fufh_type]);
if (!FUFH_IS_VALID(fufh)) {
fufh_type = FUFH_RDWR;
}
return fuse_filehandle_get(vp, fufh_type, fufhp);
}
void
fuse_filehandle_init(struct vnode *vp,
fufh_type_t fufh_type,
struct fuse_filehandle **fufhp,
uint64_t fh_id)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh;
DEBUG("id=%jd type=%d\n", (intmax_t)fh_id, fufh_type);
fufh = &(fvdat->fufh[fufh_type]);
MPASS(!FUFH_IS_VALID(fufh));
fufh->fh_id = fh_id;
fufh->fh_type = fufh_type;
if (!FUFH_IS_VALID(fufh)) {
panic("FUSE: init: invalid filehandle id (type=%d)", fufh_type);
}
if (fufhp != NULL)
*fufhp = fufh;
atomic_add_acq_int(&fuse_fh_count, 1);
}

153
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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_FILE_H_
#define _FUSE_FILE_H_
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/vnode.h>
typedef enum fufh_type {
FUFH_INVALID = -1,
FUFH_RDONLY = 0,
FUFH_WRONLY = 1,
FUFH_RDWR = 2,
FUFH_MAXTYPE = 3,
} fufh_type_t;
struct fuse_filehandle {
uint64_t fh_id;
fufh_type_t fh_type;
};
#define FUFH_IS_VALID(f) ((f)->fh_type != FUFH_INVALID)
static __inline__
fufh_type_t
fuse_filehandle_xlate_from_mmap(int fflags)
{
if (fflags & (PROT_READ | PROT_WRITE)) {
return FUFH_RDWR;
} else if (fflags & (PROT_WRITE)) {
return FUFH_WRONLY;
} else if ((fflags & PROT_READ) || (fflags & PROT_EXEC)) {
return FUFH_RDONLY;
} else {
return FUFH_INVALID;
}
}
static __inline__
fufh_type_t
fuse_filehandle_xlate_from_fflags(int fflags)
{
if ((fflags & FREAD) && (fflags & FWRITE)) {
return FUFH_RDWR;
} else if (fflags & (FWRITE)) {
return FUFH_WRONLY;
} else if (fflags & (FREAD)) {
return FUFH_RDONLY;
} else {
panic("FUSE: What kind of a flag is this (%x)?", fflags);
}
}
static __inline__
int
fuse_filehandle_xlate_to_oflags(fufh_type_t type)
{
int oflags = -1;
switch (type) {
case FUFH_RDONLY:
oflags = O_RDONLY;
break;
case FUFH_WRONLY:
oflags = O_WRONLY;
break;
case FUFH_RDWR:
oflags = O_RDWR;
break;
default:
break;
}
return oflags;
}
int fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type);
int fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp);
int fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp);
void fuse_filehandle_init(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp, uint64_t fh_id);
int fuse_filehandle_open(struct vnode *vp, fufh_type_t fufh_type,
struct fuse_filehandle **fufhp, struct thread *td,
struct ucred *cred);
int fuse_filehandle_close(struct vnode *vp, fufh_type_t fufh_type,
struct thread *td, struct ucred *cred);
#endif /* _FUSE_FILE_H_ */

696
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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sx.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/fcntl.h>
#include <sys/dirent.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/sysctl.h>
#include <sys/priv.h>
#include "fuse.h"
#include "fuse_file.h"
#include "fuse_internal.h"
#include "fuse_ipc.h"
#include "fuse_node.h"
#include "fuse_file.h"
#include "fuse_param.h"
#define FUSE_DEBUG_MODULE INTERNAL
#include "fuse_debug.h"
#ifdef ZERO_PAD_INCOMPLETE_BUFS
static int isbzero(void *buf, size_t len);
#endif
/* access */
int
fuse_internal_access(struct vnode *vp,
mode_t mode,
struct fuse_access_param *facp,
struct thread *td,
struct ucred *cred)
{
int err = 0;
uint32_t mask = 0;
int dataflags;
int vtype;
struct mount *mp;
struct fuse_dispatcher fdi;
struct fuse_access_in *fai;
struct fuse_data *data;
/* NOT YET DONE */
/*
* If this vnop gives you trouble, just return 0 here for a lazy
* kludge.
*/
/* return 0;*/
fuse_trace_printf_func();
mp = vnode_mount(vp);
vtype = vnode_vtype(vp);
data = fuse_get_mpdata(mp);
dataflags = data->dataflags;
if ((mode & VWRITE) && vfs_isrdonly(mp)) {
return EACCES;
}
/* Unless explicitly permitted, deny everyone except the fs owner. */
if (vnode_isvroot(vp) && !(facp->facc_flags & FACCESS_NOCHECKSPY)) {
if (!(dataflags & FSESS_DAEMON_CAN_SPY)) {
int denied = fuse_match_cred(data->daemoncred,
cred);
if (denied) {
return EPERM;
}
}
facp->facc_flags |= FACCESS_NOCHECKSPY;
}
if (!(facp->facc_flags & FACCESS_DO_ACCESS)) {
return 0;
}
if (((vtype == VREG) && (mode & VEXEC))) {
#ifdef NEED_MOUNT_ARGUMENT_FOR_THIS
/* Let the kernel handle this through open / close heuristics.*/
return ENOTSUP;
#else
/* Let the kernel handle this. */
return 0;
#endif
}
if (!fsess_isimpl(mp, FUSE_ACCESS)) {
/* Let the kernel handle this. */
return 0;
}
if (dataflags & FSESS_DEFAULT_PERMISSIONS) {
/* Let the kernel handle this. */
return 0;
}
if ((mode & VADMIN) != 0) {
err = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
if (err) {
return err;
}
}
if ((mode & (VWRITE | VAPPEND | VADMIN)) != 0) {
mask |= W_OK;
}
if ((mode & VREAD) != 0) {
mask |= R_OK;
}
if ((mode & VEXEC) != 0) {
mask |= X_OK;
}
bzero(&fdi, sizeof(fdi));
fdisp_init(&fdi, sizeof(*fai));
fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred);
fai = fdi.indata;
fai->mask = F_OK;
fai->mask |= mask;
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
if (err == ENOSYS) {
fsess_set_notimpl(mp, FUSE_ACCESS);
err = 0;
}
return err;
}
/* fsync */
int
fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio)
{
fuse_trace_printf_func();
if (tick->tk_aw_ohead.error == ENOSYS) {
fsess_set_notimpl(tick->tk_data->mp, fticket_opcode(tick));
}
return 0;
}
int
fuse_internal_fsync(struct vnode *vp,
struct thread *td,
struct ucred *cred,
struct fuse_filehandle *fufh)
{
int op = FUSE_FSYNC;
struct fuse_fsync_in *ffsi;
struct fuse_dispatcher fdi;
fuse_trace_printf_func();
if (vnode_isdir(vp)) {
op = FUSE_FSYNCDIR;
}
fdisp_init(&fdi, sizeof(*ffsi));
fdisp_make_vp(&fdi, op, vp, td, cred);
ffsi = fdi.indata;
ffsi->fh = fufh->fh_id;
ffsi->fsync_flags = 1; /* datasync */
fuse_insert_callback(fdi.tick, fuse_internal_fsync_callback);
fuse_insert_message(fdi.tick);
fdisp_destroy(&fdi);
return 0;
}
/* readdir */
int
fuse_internal_readdir(struct vnode *vp,
struct uio *uio,
struct fuse_filehandle *fufh,
struct fuse_iov *cookediov)
{
int err = 0;
struct fuse_dispatcher fdi;
struct fuse_read_in *fri;
if (uio_resid(uio) == 0) {
return 0;
}
fdisp_init(&fdi, 0);
/*
* Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p
* I/O).
*/
while (uio_resid(uio) > 0) {
fdi.iosize = sizeof(*fri);
fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL);
fri = fdi.indata;
fri->fh = fufh->fh_id;
fri->offset = uio_offset(uio);
fri->size = min(uio_resid(uio), FUSE_DEFAULT_IOSIZE);
/* mp->max_read */
if ((err = fdisp_wait_answ(&fdi))) {
break;
}
if ((err = fuse_internal_readdir_processdata(uio, fri->size, fdi.answ,
fdi.iosize, cookediov))) {
break;
}
}
fdisp_destroy(&fdi);
return ((err == -1) ? 0 : err);
}
int
fuse_internal_readdir_processdata(struct uio *uio,
size_t reqsize,
void *buf,
size_t bufsize,
void *param)
{
int err = 0;
int cou = 0;
int bytesavail;
size_t freclen;
struct dirent *de;
struct fuse_dirent *fudge;
struct fuse_iov *cookediov = param;
if (bufsize < FUSE_NAME_OFFSET) {
return -1;
}
for (;;) {
if (bufsize < FUSE_NAME_OFFSET) {
err = -1;
break;
}
fudge = (struct fuse_dirent *)buf;
freclen = FUSE_DIRENT_SIZE(fudge);
cou++;
if (bufsize < freclen) {
err = ((cou == 1) ? -1 : 0);
break;
}
#ifdef ZERO_PAD_INCOMPLETE_BUFS
if (isbzero(buf, FUSE_NAME_OFFSET)) {
err = -1;
break;
}
#endif
if (!fudge->namelen || fudge->namelen > MAXNAMLEN) {
err = EINVAL;
break;
}
bytesavail = GENERIC_DIRSIZ((struct pseudo_dirent *)
&fudge->namelen);
if (bytesavail > uio_resid(uio)) {
err = -1;
break;
}
fiov_refresh(cookediov);
fiov_adjust(cookediov, bytesavail);
de = (struct dirent *)cookediov->base;
de->d_fileno = fudge->ino; /* XXX: truncation */
de->d_reclen = bytesavail;
de->d_type = fudge->type;
de->d_namlen = fudge->namelen;
memcpy((char *)cookediov->base + sizeof(struct dirent) -
MAXNAMLEN - 1,
(char *)buf + FUSE_NAME_OFFSET, fudge->namelen);
((char *)cookediov->base)[bytesavail] = '\0';
err = uiomove(cookediov->base, cookediov->len, uio);
if (err) {
break;
}
buf = (char *)buf + freclen;
bufsize -= freclen;
uio_setoffset(uio, fudge->off);
}
return err;
}
/* remove */
#ifdef XXXIP
static int
fuse_internal_remove_callback(struct vnode *vp, void *cargs)
{
struct vattr *vap;
uint64_t target_nlink;
vap = VTOVA(vp);
target_nlink = *(uint64_t *)cargs;
/* somewhat lame "heuristics", but you got better ideas? */
if ((vap->va_nlink == target_nlink) && vnode_isreg(vp)) {
fuse_invalidate_attr(vp);
}
return 0;
}
#endif
#define INVALIDATE_CACHED_VATTRS_UPON_UNLINK 1
int
fuse_internal_remove(struct vnode *dvp,
struct vnode *vp,
struct componentname *cnp,
enum fuse_opcode op)
{
struct fuse_dispatcher fdi;
struct vattr *vap = VTOVA(vp);
#if INVALIDATE_CACHED_VATTRS_UPON_UNLINK
int need_invalidate = 0;
uint64_t target_nlink = 0;
#endif
int err = 0;
debug_printf("dvp=%p, cnp=%p, op=%d\n", vp, cnp, op);
fdisp_init(&fdi, cnp->cn_namelen + 1);
fdisp_make_vp(&fdi, op, dvp, cnp->cn_thread, cnp->cn_cred);
memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
((char *)fdi.indata)[cnp->cn_namelen] = '\0';
#if INVALIDATE_CACHED_VATTRS_UPON_UNLINK
if (vap->va_nlink > 1) {
need_invalidate = 1;
target_nlink = vap->va_nlink;
}
#endif
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
fuse_invalidate_attr(dvp);
fuse_invalidate_attr(vp);
#ifdef XXXIP
/*
* XXX: INVALIDATE_CACHED_VATTRS_UPON_UNLINK
*
* Consider the case where vap->va_nlink > 1 for the entity being
* removed. In our world, other in-memory vnodes that share a link
* count each with this one may not know right way that this one just
* got deleted. We should let them know, say, through a vnode_iterate()
* here and a callback that does fuse_invalidate_attr(vp) on each
* relevant vnode.
*/
if (need_invalidate && !err) {
vnode_iterate(vnode_mount(vp), 0, fuse_internal_remove_callback,
(void *)&target_nlink);
}
#endif
return err;
}
/* rename */
int
fuse_internal_rename(struct vnode *fdvp,
struct componentname *fcnp,
struct vnode *tdvp,
struct componentname *tcnp)
{
struct fuse_dispatcher fdi;
struct fuse_rename_in *fri;
int err = 0;
fdisp_init(&fdi, sizeof(*fri) + fcnp->cn_namelen + tcnp->cn_namelen + 2);
fdisp_make_vp(&fdi, FUSE_RENAME, fdvp, tcnp->cn_thread, tcnp->cn_cred);
fri = fdi.indata;
fri->newdir = VTOI(tdvp);
memcpy((char *)fdi.indata + sizeof(*fri), fcnp->cn_nameptr,
fcnp->cn_namelen);
((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen] = '\0';
memcpy((char *)fdi.indata + sizeof(*fri) + fcnp->cn_namelen + 1,
tcnp->cn_nameptr, tcnp->cn_namelen);
((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen +
tcnp->cn_namelen + 1] = '\0';
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
fuse_invalidate_attr(fdvp);
if (tdvp != fdvp) {
fuse_invalidate_attr(tdvp);
}
return err;
}
/* strategy */
/* entity creation */
void
fuse_internal_newentry_makerequest(struct mount *mp,
uint64_t dnid,
struct componentname *cnp,
enum fuse_opcode op,
void *buf,
size_t bufsize,
struct fuse_dispatcher *fdip)
{
debug_printf("fdip=%p\n", fdip);
fdip->iosize = bufsize + cnp->cn_namelen + 1;
fdisp_make(fdip, op, mp, dnid, cnp->cn_thread, cnp->cn_cred);
memcpy(fdip->indata, buf, bufsize);
memcpy((char *)fdip->indata + bufsize, cnp->cn_nameptr, cnp->cn_namelen);
((char *)fdip->indata)[bufsize + cnp->cn_namelen] = '\0';
}
int
fuse_internal_newentry_core(struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum vtype vtyp,
struct fuse_dispatcher *fdip)
{
int err = 0;
struct fuse_entry_out *feo;
struct mount *mp = vnode_mount(dvp);
if ((err = fdisp_wait_answ(fdip))) {
return err;
}
feo = fdip->answ;
if ((err = fuse_internal_checkentry(feo, vtyp))) {
return err;
}
err = fuse_vnode_get(mp, feo->nodeid, dvp, vpp, cnp, vtyp);
if (err) {
fuse_internal_forget_send(mp, cnp->cn_thread, cnp->cn_cred,
feo->nodeid, 1);
return err;
}
cache_attrs(*vpp, feo);
return err;
}
int
fuse_internal_newentry(struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum fuse_opcode op,
void *buf,
size_t bufsize,
enum vtype vtype)
{
int err;
struct fuse_dispatcher fdi;
struct mount *mp = vnode_mount(dvp);
fdisp_init(&fdi, 0);
fuse_internal_newentry_makerequest(mp, VTOI(dvp), cnp, op, buf,
bufsize, &fdi);
err = fuse_internal_newentry_core(dvp, vpp, cnp, vtype, &fdi);
fdisp_destroy(&fdi);
fuse_invalidate_attr(dvp);
return err;
}
/* entity destruction */
int
fuse_internal_forget_callback(struct fuse_ticket *ftick, struct uio *uio)
{
fuse_internal_forget_send(ftick->tk_data->mp, curthread, NULL,
((struct fuse_in_header *)ftick->tk_ms_fiov.base)->nodeid, 1);
return 0;
}
void
fuse_internal_forget_send(struct mount *mp,
struct thread *td,
struct ucred *cred,
uint64_t nodeid,
uint64_t nlookup)
{
struct fuse_dispatcher fdi;
struct fuse_forget_in *ffi;
debug_printf("mp=%p, nodeid=%ju, nlookup=%ju\n",
mp, (uintmax_t)nodeid, (uintmax_t)nlookup);
/*
* KASSERT(nlookup > 0, ("zero-times forget for vp #%llu",
* (long long unsigned) nodeid));
*/
fdisp_init(&fdi, sizeof(*ffi));
fdisp_make(&fdi, FUSE_FORGET, mp, nodeid, td, cred);
ffi = fdi.indata;
ffi->nlookup = nlookup;
fuse_insert_message(fdi.tick);
fdisp_destroy(&fdi);
}
void
fuse_internal_vnode_disappear(struct vnode *vp)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear");
fvdat->flag |= FN_REVOKED;
cache_purge(vp);
}
/* fuse start/stop */
int
fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio)
{
int err = 0;
struct fuse_data *data = tick->tk_data;
struct fuse_init_out *fiio;
if ((err = tick->tk_aw_ohead.error)) {
goto out;
}
if ((err = fticket_pull(tick, uio))) {
goto out;
}
fiio = fticket_resp(tick)->base;
/* XXX: Do we want to check anything further besides this? */
if (fiio->major < 7) {
debug_printf("userpace version too low\n");
err = EPROTONOSUPPORT;
goto out;
}
data->fuse_libabi_major = fiio->major;
data->fuse_libabi_minor = fiio->minor;
if (fuse_libabi_geq(data, 7, 5)) {
if (fticket_resp(tick)->len == sizeof(struct fuse_init_out)) {
data->max_write = fiio->max_write;
} else {
err = EINVAL;
}
} else {
/* Old fix values */
data->max_write = 4096;
}
out:
if (err) {
fdata_set_dead(data);
}
FUSE_LOCK();
data->dataflags |= FSESS_INITED;
wakeup(&data->ticketer);
FUSE_UNLOCK();
return 0;
}
void
fuse_internal_send_init(struct fuse_data *data, struct thread *td)
{
struct fuse_init_in *fiii;
struct fuse_dispatcher fdi;
fdisp_init(&fdi, sizeof(*fiii));
fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL);
fiii = fdi.indata;
fiii->major = FUSE_KERNEL_VERSION;
fiii->minor = FUSE_KERNEL_MINOR_VERSION;
fiii->max_readahead = FUSE_DEFAULT_IOSIZE * 16;
fiii->flags = 0;
fuse_insert_callback(fdi.tick, fuse_internal_init_callback);
fuse_insert_message(fdi.tick);
fdisp_destroy(&fdi);
}
#ifdef ZERO_PAD_INCOMPLETE_BUFS
static int
isbzero(void *buf, size_t len)
{
int i;
for (i = 0; i < len; i++) {
if (((char *)buf)[i])
return (0);
}
return (1);
}
#endif

393
sys/fs/fuse/fuse_internal.h Normal file
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@ -0,0 +1,393 @@
/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_INTERNAL_H_
#define _FUSE_INTERNAL_H_
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include "fuse_ipc.h"
#include "fuse_node.h"
static __inline int
vfs_isrdonly(struct mount *mp)
{
return ((mp->mnt_flag & MNT_RDONLY) != 0 ? 1 : 0);
}
static __inline struct mount *
vnode_mount(struct vnode *vp)
{
return (vp->v_mount);
}
static __inline int
vnode_mountedhere(struct vnode *vp)
{
return (vp->v_mountedhere != NULL ? 1 : 0);
}
static __inline enum vtype
vnode_vtype(struct vnode *vp)
{
return (vp->v_type);
}
static __inline int
vnode_isvroot(struct vnode *vp)
{
return ((vp->v_vflag & VV_ROOT) != 0 ? 1 : 0);
}
static __inline int
vnode_isreg(struct vnode *vp)
{
return (vp->v_type == VREG ? 1 : 0);
}
static __inline int
vnode_isdir(struct vnode *vp)
{
return (vp->v_type == VDIR ? 1 : 0);
}
static __inline int
vnode_islnk(struct vnode *vp)
{
return (vp->v_type == VLNK ? 1 : 0);
}
static __inline ssize_t
uio_resid(struct uio *uio)
{
return (uio->uio_resid);
}
static __inline off_t
uio_offset(struct uio *uio)
{
return (uio->uio_offset);
}
static __inline void
uio_setoffset(struct uio *uio, off_t offset)
{
uio->uio_offset = offset;
}
static __inline void
uio_setresid(struct uio *uio, ssize_t resid)
{
uio->uio_resid = resid;
}
/* time */
#define fuse_timespec_add(vvp, uvp) \
do { \
(vvp)->tv_sec += (uvp)->tv_sec; \
(vvp)->tv_nsec += (uvp)->tv_nsec; \
if ((vvp)->tv_nsec >= 1000000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_nsec -= 1000000000; \
} \
} while (0)
#define fuse_timespec_cmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
/* miscellaneous */
static __inline__
int
fuse_isdeadfs(struct vnode *vp)
{
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
return (data->dataflags & FSESS_DEAD);
}
static __inline__
int
fuse_iosize(struct vnode *vp)
{
return vp->v_mount->mnt_stat.f_iosize;
}
/* access */
#define FVP_ACCESS_NOOP 0x01
#define FACCESS_VA_VALID 0x01
#define FACCESS_DO_ACCESS 0x02
#define FACCESS_STICKY 0x04
#define FACCESS_CHOWN 0x08
#define FACCESS_NOCHECKSPY 0x10
#define FACCESS_SETGID 0x12
#define FACCESS_XQUERIES FACCESS_STICKY | FACCESS_CHOWN | FACCESS_SETGID
struct fuse_access_param {
uid_t xuid;
gid_t xgid;
uint32_t facc_flags;
};
static __inline int
fuse_match_cred(struct ucred *basecred, struct ucred *usercred)
{
if (basecred->cr_uid == usercred->cr_uid &&
basecred->cr_uid == usercred->cr_ruid &&
basecred->cr_uid == usercred->cr_svuid &&
basecred->cr_groups[0] == usercred->cr_groups[0] &&
basecred->cr_groups[0] == usercred->cr_rgid &&
basecred->cr_groups[0] == usercred->cr_svgid)
return 0;
return EPERM;
}
int
fuse_internal_access(struct vnode *vp,
mode_t mode,
struct fuse_access_param *facp,
struct thread *td,
struct ucred *cred);
/* attributes */
static __inline
void
fuse_internal_attr_fat2vat(struct mount *mp,
struct fuse_attr *fat,
struct vattr *vap)
{
DEBUGX(FUSE_DEBUG_INTERNAL,
"node #%ju, mode 0%o\n", (uintmax_t)fat->ino, fat->mode);
vattr_null(vap);
vap->va_fsid = mp->mnt_stat.f_fsid.val[0];
vap->va_fileid = fat->ino; /* XXX cast from 64 bits to 32 */
vap->va_mode = fat->mode & ~S_IFMT;
vap->va_nlink = fat->nlink;
vap->va_uid = fat->uid;
vap->va_gid = fat->gid;
vap->va_rdev = fat->rdev;
vap->va_size = fat->size;
vap->va_atime.tv_sec = fat->atime; /* XXX on some platforms cast from 64 bits to 32 */
vap->va_atime.tv_nsec = fat->atimensec;
vap->va_mtime.tv_sec = fat->mtime;
vap->va_mtime.tv_nsec = fat->mtimensec;
vap->va_ctime.tv_sec = fat->ctime;
vap->va_ctime.tv_nsec = fat->ctimensec;
vap->va_blocksize = PAGE_SIZE;
vap->va_type = IFTOVT(fat->mode);
#if (S_BLKSIZE == 512)
/* Optimize this case */
vap->va_bytes = fat->blocks << 9;
#else
vap->va_bytes = fat->blocks * S_BLKSIZE;
#endif
vap->va_flags = 0;
}
#define cache_attrs(vp, fuse_out) do { \
struct timespec uptsp_ ## __func__; \
\
VTOFUD(vp)->cached_attrs_valid.tv_sec = (fuse_out)->attr_valid; \
VTOFUD(vp)->cached_attrs_valid.tv_nsec = (fuse_out)->attr_valid_nsec; \
nanouptime(&uptsp_ ## __func__); \
\
fuse_timespec_add(&VTOFUD(vp)->cached_attrs_valid, &uptsp_ ## __func__); \
\
fuse_internal_attr_fat2vat(vnode_mount(vp), &(fuse_out)->attr, VTOVA(vp)); \
} while (0)
/* fsync */
int
fuse_internal_fsync(struct vnode *vp,
struct thread *td,
struct ucred *cred,
struct fuse_filehandle *fufh);
int
fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio);
/* readdir */
struct pseudo_dirent {
uint32_t d_namlen;
};
int
fuse_internal_readdir(struct vnode *vp,
struct uio *uio,
struct fuse_filehandle *fufh,
struct fuse_iov *cookediov);
int
fuse_internal_readdir_processdata(struct uio *uio,
size_t reqsize,
void *buf,
size_t bufsize,
void *param);
/* remove */
int
fuse_internal_remove(struct vnode *dvp,
struct vnode *vp,
struct componentname *cnp,
enum fuse_opcode op);
/* rename */
int
fuse_internal_rename(struct vnode *fdvp,
struct componentname *fcnp,
struct vnode *tdvp,
struct componentname *tcnp);
/* revoke */
void
fuse_internal_vnode_disappear(struct vnode *vp);
/* strategy */
/* entity creation */
static __inline
int
fuse_internal_checkentry(struct fuse_entry_out *feo, enum vtype vtyp)
{
DEBUGX(FUSE_DEBUG_INTERNAL,
"feo=%p, vtype=%d\n", feo, vtyp);
if (vtyp != IFTOVT(feo->attr.mode)) {
DEBUGX(FUSE_DEBUG_INTERNAL,
"EINVAL -- %x != %x\n", vtyp, IFTOVT(feo->attr.mode));
return EINVAL;
}
if (feo->nodeid == FUSE_NULL_ID) {
DEBUGX(FUSE_DEBUG_INTERNAL,
"EINVAL -- feo->nodeid is NULL\n");
return EINVAL;
}
if (feo->nodeid == FUSE_ROOT_ID) {
DEBUGX(FUSE_DEBUG_INTERNAL,
"EINVAL -- feo->nodeid is FUSE_ROOT_ID\n");
return EINVAL;
}
return 0;
}
int
fuse_internal_newentry(struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum fuse_opcode op,
void *buf,
size_t bufsize,
enum vtype vtyp);
void
fuse_internal_newentry_makerequest(struct mount *mp,
uint64_t dnid,
struct componentname *cnp,
enum fuse_opcode op,
void *buf,
size_t bufsize,
struct fuse_dispatcher *fdip);
int
fuse_internal_newentry_core(struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum vtype vtyp,
struct fuse_dispatcher *fdip);
/* entity destruction */
int
fuse_internal_forget_callback(struct fuse_ticket *tick, struct uio *uio);
void
fuse_internal_forget_send(struct mount *mp,
struct thread *td,
struct ucred *cred,
uint64_t nodeid,
uint64_t nlookup);
/* fuse start/stop */
int fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio);
void fuse_internal_send_init(struct fuse_data *data, struct thread *td);
#endif /* _FUSE_INTERNAL_H_ */

811
sys/fs/fuse/fuse_io.c Normal file
View file

@ -0,0 +1,811 @@
/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/fcntl.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_pager.h>
#include <vm/vnode_pager.h>
#include <vm/vm_object.h>
#include "fuse.h"
#include "fuse_file.h"
#include "fuse_node.h"
#include "fuse_internal.h"
#include "fuse_ipc.h"
#include "fuse_io.h"
#define FUSE_DEBUG_MODULE IO
#include "fuse_debug.h"
static int
fuse_read_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh);
static int
fuse_read_biobackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh);
static int
fuse_write_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh);
static int
fuse_write_biobackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh);
int
fuse_io_dispatch(struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred)
{
struct fuse_filehandle *fufh;
int err, directio;
MPASS(vp->v_type == VREG);
err = fuse_filehandle_getrw(vp,
(uio->uio_rw == UIO_READ) ? FUFH_RDONLY : FUFH_WRONLY, &fufh);
if (err) {
printf("FUSE: io dispatch: filehandles are closed\n");
return err;
}
/*
* Ideally, when the daemon asks for direct io at open time, the
* standard file flag should be set according to this, so that would
* just change the default mode, which later on could be changed via
* fcntl(2).
* But this doesn't work, the O_DIRECT flag gets cleared at some point
* (don't know where). So to make any use of the Fuse direct_io option,
* we hardwire it into the file's private data (similarly to Linux,
* btw.).
*/
directio = (ioflag & IO_DIRECT) || !fsess_opt_datacache(vnode_mount(vp));
switch (uio->uio_rw) {
case UIO_READ:
if (directio) {
DEBUG("direct read of vnode %ju via file handle %ju\n",
(uintmax_t)VTOILLU(vp), (uintmax_t)fufh->fh_id);
err = fuse_read_directbackend(vp, uio, cred, fufh);
} else {
DEBUG("buffered read of vnode %ju\n",
(uintmax_t)VTOILLU(vp));
err = fuse_read_biobackend(vp, uio, cred, fufh);
}
break;
case UIO_WRITE:
if (directio) {
DEBUG("direct write of vnode %ju via file handle %ju\n",
(uintmax_t)VTOILLU(vp), (uintmax_t)fufh->fh_id);
err = fuse_write_directbackend(vp, uio, cred, fufh);
fuse_invalidate_attr(vp);
} else {
DEBUG("buffered write of vnode %ju\n",
(uintmax_t)VTOILLU(vp));
err = fuse_write_biobackend(vp, uio, cred, fufh);
}
break;
default:
panic("uninterpreted mode passed to fuse_io_dispatch");
}
return (err);
}
static int
fuse_read_biobackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh)
{
struct buf *bp;
daddr_t lbn;
int bcount;
int err = 0, n = 0, on = 0;
off_t filesize;
const int biosize = fuse_iosize(vp);
DEBUG("resid=%zx offset=%jx fsize=%jx\n",
uio->uio_resid, uio->uio_offset, VTOFUD(vp)->filesize);
if (uio->uio_resid == 0)
return (0);
if (uio->uio_offset < 0)
return (EINVAL);
bcount = MIN(MAXBSIZE, biosize);
filesize = VTOFUD(vp)->filesize;
do {
if (fuse_isdeadfs(vp)) {
err = ENXIO;
break;
}
lbn = uio->uio_offset / biosize;
on = uio->uio_offset & (biosize - 1);
DEBUG2G("biosize %d, lbn %d, on %d\n", biosize, (int)lbn, on);
/*
* Obtain the buffer cache block. Figure out the buffer size
* when we are at EOF. If we are modifying the size of the
* buffer based on an EOF condition we need to hold
* nfs_rslock() through obtaining the buffer to prevent
* a potential writer-appender from messing with n_size.
* Otherwise we may accidently truncate the buffer and
* lose dirty data.
*
* Note that bcount is *not* DEV_BSIZE aligned.
*/
if ((off_t)lbn * biosize >= filesize) {
bcount = 0;
} else if ((off_t)(lbn + 1) * biosize > filesize) {
bcount = filesize - (off_t)lbn *biosize;
}
bp = getblk(vp, lbn, bcount, PCATCH, 0, 0);
if (!bp)
return (EINTR);
/*
* If B_CACHE is not set, we must issue the read. If this
* fails, we return an error.
*/
if ((bp->b_flags & B_CACHE) == 0) {
bp->b_iocmd = BIO_READ;
vfs_busy_pages(bp, 0);
err = fuse_io_strategy(vp, bp);
if (err) {
brelse(bp);
return (err);
}
}
/*
* on is the offset into the current bp. Figure out how many
* bytes we can copy out of the bp. Note that bcount is
* NOT DEV_BSIZE aligned.
*
* Then figure out how many bytes we can copy into the uio.
*/
n = 0;
if (on < bcount)
n = MIN((unsigned)(bcount - on), uio->uio_resid);
if (n > 0) {
DEBUG2G("feeding buffeater with %d bytes of buffer %p,"
" saying %d was asked for\n",
n, bp->b_data + on, n + (int)bp->b_resid);
err = uiomove(bp->b_data + on, n, uio);
}
brelse(bp);
DEBUG2G("end of turn, err %d, uio->uio_resid %zd, n %d\n",
err, uio->uio_resid, n);
} while (err == 0 && uio->uio_resid > 0 && n > 0);
return (err);
}
static int
fuse_read_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh)
{
struct fuse_dispatcher fdi;
struct fuse_read_in *fri;
int err = 0;
if (uio->uio_resid == 0)
return (0);
fdisp_init(&fdi, 0);
/*
* XXX In "normal" case we use an intermediate kernel buffer for
* transmitting data from daemon's context to ours. Eventually, we should
* get rid of this. Anyway, if the target uio lives in sysspace (we are
* called from pageops), and the input data doesn't need kernel-side
* processing (we are not called from readdir) we can already invoke
* an optimized, "peer-to-peer" I/O routine.
*/
while (uio->uio_resid > 0) {
fdi.iosize = sizeof(*fri);
fdisp_make_vp(&fdi, FUSE_READ, vp, uio->uio_td, cred);
fri = fdi.indata;
fri->fh = fufh->fh_id;
fri->offset = uio->uio_offset;
fri->size = MIN(uio->uio_resid,
fuse_get_mpdata(vp->v_mount)->max_read);
DEBUG2G("fri->fh %ju, fri->offset %ju, fri->size %ju\n",
(uintmax_t)fri->fh, (uintmax_t)fri->offset,
(uintmax_t)fri->size);
if ((err = fdisp_wait_answ(&fdi)))
goto out;
DEBUG2G("complete: got iosize=%d, requested fri.size=%zd; "
"resid=%zd offset=%ju\n",
fri->size, fdi.iosize, uio->uio_resid,
(uintmax_t)uio->uio_offset);
if ((err = uiomove(fdi.answ, MIN(fri->size, fdi.iosize), uio)))
break;
if (fdi.iosize < fri->size)
break;
}
out:
fdisp_destroy(&fdi);
return (err);
}
static int
fuse_write_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_write_in *fwi;
struct fuse_dispatcher fdi;
size_t chunksize;
int diff;
int err = 0;
if (!uio->uio_resid)
return (0);
fdisp_init(&fdi, 0);
while (uio->uio_resid > 0) {
chunksize = MIN(uio->uio_resid,
fuse_get_mpdata(vp->v_mount)->max_write);
fdi.iosize = sizeof(*fwi) + chunksize;
fdisp_make_vp(&fdi, FUSE_WRITE, vp, uio->uio_td, cred);
fwi = fdi.indata;
fwi->fh = fufh->fh_id;
fwi->offset = uio->uio_offset;
fwi->size = chunksize;
if ((err = uiomove((char *)fdi.indata + sizeof(*fwi),
chunksize, uio)))
break;
if ((err = fdisp_wait_answ(&fdi)))
break;
diff = chunksize - ((struct fuse_write_out *)fdi.answ)->size;
if (diff < 0) {
err = EINVAL;
break;
}
uio->uio_resid += diff;
uio->uio_offset -= diff;
if (uio->uio_offset > fvdat->filesize)
fuse_vnode_setsize(vp, cred, uio->uio_offset);
}
fdisp_destroy(&fdi);
return (err);
}
static int
fuse_write_biobackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct buf *bp;
daddr_t lbn;
int bcount;
int n, on, err = 0;
const int biosize = fuse_iosize(vp);
KASSERT(uio->uio_rw == UIO_WRITE, ("ncl_write mode"));
DEBUG("resid=%zx offset=%jx fsize=%jx\n",
uio->uio_resid, uio->uio_offset, fvdat->filesize);
if (vp->v_type != VREG)
return (EIO);
if (uio->uio_offset < 0)
return (EINVAL);
if (uio->uio_resid == 0)
return (0);
/*
* Find all of this file's B_NEEDCOMMIT buffers. If our writes
* would exceed the local maximum per-file write commit size when
* combined with those, we must decide whether to flush,
* go synchronous, or return err. We don't bother checking
* IO_UNIT -- we just make all writes atomic anyway, as there's
* no point optimizing for something that really won't ever happen.
*/
do {
if (fuse_isdeadfs(vp)) {
err = ENXIO;
break;
}
lbn = uio->uio_offset / biosize;
on = uio->uio_offset & (biosize - 1);
n = MIN((unsigned)(biosize - on), uio->uio_resid);
DEBUG2G("lbn %ju, on %d, n %d, uio offset %ju, uio resid %zd\n",
(uintmax_t)lbn, on, n,
(uintmax_t)uio->uio_offset, uio->uio_resid);
again:
/*
* Handle direct append and file extension cases, calculate
* unaligned buffer size.
*/
if (uio->uio_offset == fvdat->filesize && n) {
/*
* Get the buffer (in its pre-append state to maintain
* B_CACHE if it was previously set). Resize the
* nfsnode after we have locked the buffer to prevent
* readers from reading garbage.
*/
bcount = on;
DEBUG("getting block from OS, bcount %d\n", bcount);
bp = getblk(vp, lbn, bcount, PCATCH, 0, 0);
if (bp != NULL) {
long save;
err = fuse_vnode_setsize(vp, cred,
uio->uio_offset + n);
if (err) {
brelse(bp);
break;
}
save = bp->b_flags & B_CACHE;
bcount += n;
allocbuf(bp, bcount);
bp->b_flags |= save;
}
} else {
/*
* Obtain the locked cache block first, and then
* adjust the file's size as appropriate.
*/
bcount = on + n;
if ((off_t)lbn * biosize + bcount < fvdat->filesize) {
if ((off_t)(lbn + 1) * biosize < fvdat->filesize)
bcount = biosize;
else
bcount = fvdat->filesize -
(off_t)lbn *biosize;
}
DEBUG("getting block from OS, bcount %d\n", bcount);
bp = getblk(vp, lbn, bcount, PCATCH, 0, 0);
if (bp && uio->uio_offset + n > fvdat->filesize) {
err = fuse_vnode_setsize(vp, cred,
uio->uio_offset + n);
if (err) {
brelse(bp);
break;
}
}
}
if (!bp) {
err = EINTR;
break;
}
/*
* Issue a READ if B_CACHE is not set. In special-append
* mode, B_CACHE is based on the buffer prior to the write
* op and is typically set, avoiding the read. If a read
* is required in special append mode, the server will
* probably send us a short-read since we extended the file
* on our end, resulting in b_resid == 0 and, thusly,
* B_CACHE getting set.
*
* We can also avoid issuing the read if the write covers
* the entire buffer. We have to make sure the buffer state
* is reasonable in this case since we will not be initiating
* I/O. See the comments in kern/vfs_bio.c's getblk() for
* more information.
*
* B_CACHE may also be set due to the buffer being cached
* normally.
*/
if (on == 0 && n == bcount) {
bp->b_flags |= B_CACHE;
bp->b_flags &= ~B_INVAL;
bp->b_ioflags &= ~BIO_ERROR;
}
if ((bp->b_flags & B_CACHE) == 0) {
bp->b_iocmd = BIO_READ;
vfs_busy_pages(bp, 0);
fuse_io_strategy(vp, bp);
if ((err = bp->b_error)) {
brelse(bp);
break;
}
}
if (bp->b_wcred == NOCRED)
bp->b_wcred = crhold(cred);
/*
* If dirtyend exceeds file size, chop it down. This should
* not normally occur but there is an append race where it
* might occur XXX, so we log it.
*
* If the chopping creates a reverse-indexed or degenerate
* situation with dirtyoff/end, we 0 both of them.
*/
if (bp->b_dirtyend > bcount) {
DEBUG("FUSE append race @%lx:%d\n",
(long)bp->b_blkno * biosize,
bp->b_dirtyend - bcount);
bp->b_dirtyend = bcount;
}
if (bp->b_dirtyoff >= bp->b_dirtyend)
bp->b_dirtyoff = bp->b_dirtyend = 0;
/*
* If the new write will leave a contiguous dirty
* area, just update the b_dirtyoff and b_dirtyend,
* otherwise force a write rpc of the old dirty area.
*
* While it is possible to merge discontiguous writes due to
* our having a B_CACHE buffer ( and thus valid read data
* for the hole), we don't because it could lead to
* significant cache coherency problems with multiple clients,
* especially if locking is implemented later on.
*
* as an optimization we could theoretically maintain
* a linked list of discontinuous areas, but we would still
* have to commit them separately so there isn't much
* advantage to it except perhaps a bit of asynchronization.
*/
if (bp->b_dirtyend > 0 &&
(on > bp->b_dirtyend || (on + n) < bp->b_dirtyoff)) {
/*
* Yes, we mean it. Write out everything to "storage"
* immediatly, without hesitation. (Apart from other
* reasons: the only way to know if a write is valid
* if its actually written out.)
*/
bwrite(bp);
if (bp->b_error == EINTR) {
err = EINTR;
break;
}
goto again;
}
err = uiomove((char *)bp->b_data + on, n, uio);
/*
* Since this block is being modified, it must be written
* again and not just committed. Since write clustering does
* not work for the stage 1 data write, only the stage 2
* commit rpc, we have to clear B_CLUSTEROK as well.
*/
bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
if (err) {
bp->b_ioflags |= BIO_ERROR;
bp->b_error = err;
brelse(bp);
break;
}
/*
* Only update dirtyoff/dirtyend if not a degenerate
* condition.
*/
if (n) {
if (bp->b_dirtyend > 0) {
bp->b_dirtyoff = MIN(on, bp->b_dirtyoff);
bp->b_dirtyend = MAX((on + n), bp->b_dirtyend);
} else {
bp->b_dirtyoff = on;
bp->b_dirtyend = on + n;
}
vfs_bio_set_valid(bp, on, n);
}
err = bwrite(bp);
if (err)
break;
} while (uio->uio_resid > 0 && n > 0);
if (fuse_sync_resize && (fvdat->flag & FN_SIZECHANGE) != 0)
fuse_vnode_savesize(vp, cred);
return (err);
}
int
fuse_io_strategy(struct vnode *vp, struct buf *bp)
{
struct fuse_filehandle *fufh;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct ucred *cred;
struct uio *uiop;
struct uio uio;
struct iovec io;
int error = 0;
const int biosize = fuse_iosize(vp);
MPASS(vp->v_type == VREG);
MPASS(bp->b_iocmd == BIO_READ || bp->b_iocmd == BIO_WRITE);
DEBUG("inode=%ju offset=%jd resid=%ld\n",
(uintmax_t)VTOI(vp), (intmax_t)(((off_t)bp->b_blkno) * biosize),
bp->b_bcount);
error = fuse_filehandle_getrw(vp,
(bp->b_iocmd == BIO_READ) ? FUFH_RDONLY : FUFH_WRONLY, &fufh);
if (error) {
printf("FUSE: strategy: filehandles are closed\n");
bp->b_ioflags |= BIO_ERROR;
bp->b_error = error;
return (error);
}
cred = bp->b_iocmd == BIO_READ ? bp->b_rcred : bp->b_wcred;
uiop = &uio;
uiop->uio_iov = &io;
uiop->uio_iovcnt = 1;
uiop->uio_segflg = UIO_SYSSPACE;
uiop->uio_td = curthread;
/*
* clear BIO_ERROR and B_INVAL state prior to initiating the I/O. We
* do this here so we do not have to do it in all the code that
* calls us.
*/
bp->b_flags &= ~B_INVAL;
bp->b_ioflags &= ~BIO_ERROR;
KASSERT(!(bp->b_flags & B_DONE),
("fuse_io_strategy: bp %p already marked done", bp));
if (bp->b_iocmd == BIO_READ) {
io.iov_len = uiop->uio_resid = bp->b_bcount;
io.iov_base = bp->b_data;
uiop->uio_rw = UIO_READ;
uiop->uio_offset = ((off_t)bp->b_blkno) * biosize;
error = fuse_read_directbackend(vp, uiop, cred, fufh);
if ((!error && uiop->uio_resid) ||
(fsess_opt_brokenio(vnode_mount(vp)) && error == EIO &&
uiop->uio_offset < fvdat->filesize && fvdat->filesize > 0 &&
uiop->uio_offset >= fvdat->cached_attrs.va_size)) {
/*
* If we had a short read with no error, we must have
* hit a file hole. We should zero-fill the remainder.
* This can also occur if the server hits the file EOF.
*
* Holes used to be able to occur due to pending
* writes, but that is not possible any longer.
*/
int nread = bp->b_bcount - uiop->uio_resid;
int left = uiop->uio_resid;
if (error != 0) {
printf("FUSE: Fix broken io: offset %ju, "
" resid %zd, file size %ju/%ju\n",
(uintmax_t)uiop->uio_offset,
uiop->uio_resid, fvdat->filesize,
fvdat->cached_attrs.va_size);
error = 0;
}
if (left > 0)
bzero((char *)bp->b_data + nread, left);
uiop->uio_resid = 0;
}
if (error) {
bp->b_ioflags |= BIO_ERROR;
bp->b_error = error;
}
} else {
/*
* If we only need to commit, try to commit
*/
if (bp->b_flags & B_NEEDCOMMIT) {
DEBUG("write: B_NEEDCOMMIT flags set\n");
}
/*
* Setup for actual write
*/
if ((off_t)bp->b_blkno * biosize + bp->b_dirtyend >
fvdat->filesize)
bp->b_dirtyend = fvdat->filesize -
(off_t)bp->b_blkno * biosize;
if (bp->b_dirtyend > bp->b_dirtyoff) {
io.iov_len = uiop->uio_resid = bp->b_dirtyend
- bp->b_dirtyoff;
uiop->uio_offset = (off_t)bp->b_blkno * biosize
+ bp->b_dirtyoff;
io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
uiop->uio_rw = UIO_WRITE;
error = fuse_write_directbackend(vp, uiop, cred, fufh);
if (error == EINTR || error == ETIMEDOUT
|| (!error && (bp->b_flags & B_NEEDCOMMIT))) {
bp->b_flags &= ~(B_INVAL | B_NOCACHE);
if ((bp->b_flags & B_PAGING) == 0) {
bdirty(bp);
bp->b_flags &= ~B_DONE;
}
if ((error == EINTR || error == ETIMEDOUT) &&
(bp->b_flags & B_ASYNC) == 0)
bp->b_flags |= B_EINTR;
} else {
if (error) {
bp->b_ioflags |= BIO_ERROR;
bp->b_flags |= B_INVAL;
bp->b_error = error;
}
bp->b_dirtyoff = bp->b_dirtyend = 0;
}
} else {
bp->b_resid = 0;
bufdone(bp);
return (0);
}
}
bp->b_resid = uiop->uio_resid;
bufdone(bp);
return (error);
}
int
fuse_io_flushbuf(struct vnode *vp, int waitfor, struct thread *td)
{
struct vop_fsync_args a = {
.a_vp = vp,
.a_waitfor = waitfor,
.a_td = td,
};
return (vop_stdfsync(&a));
}
/*
* Flush and invalidate all dirty buffers. If another process is already
* doing the flush, just wait for completion.
*/
int
fuse_io_invalbuf(struct vnode *vp, struct thread *td)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
int error = 0;
if (vp->v_iflag & VI_DOOMED)
return 0;
ASSERT_VOP_ELOCKED(vp, "fuse_io_invalbuf");
while (fvdat->flag & FN_FLUSHINPROG) {
struct proc *p = td->td_proc;
if (vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF)
return EIO;
fvdat->flag |= FN_FLUSHWANT;
tsleep(&fvdat->flag, PRIBIO + 2, "fusevinv", 2 * hz);
error = 0;
if (p != NULL) {
PROC_LOCK(p);
if (SIGNOTEMPTY(p->p_siglist) ||
SIGNOTEMPTY(td->td_siglist))
error = EINTR;
PROC_UNLOCK(p);
}
if (error == EINTR)
return EINTR;
}
fvdat->flag |= FN_FLUSHINPROG;
if (vp->v_bufobj.bo_object != NULL) {
VM_OBJECT_LOCK(vp->v_bufobj.bo_object);
vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object);
}
error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
while (error) {
if (error == ERESTART || error == EINTR) {
fvdat->flag &= ~FN_FLUSHINPROG;
if (fvdat->flag & FN_FLUSHWANT) {
fvdat->flag &= ~FN_FLUSHWANT;
wakeup(&fvdat->flag);
}
return EINTR;
}
error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
}
fvdat->flag &= ~FN_FLUSHINPROG;
if (fvdat->flag & FN_FLUSHWANT) {
fvdat->flag &= ~FN_FLUSHWANT;
wakeup(&fvdat->flag);
}
return (error);
}

67
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@ -0,0 +1,67 @@
/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_IO_H_
#define _FUSE_IO_H_
int fuse_io_dispatch(struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred);
int fuse_io_strategy(struct vnode *vp, struct buf *bp);
int fuse_io_flushbuf(struct vnode *vp, int waitfor, struct thread *td);
int fuse_io_invalbuf(struct vnode *vp, struct thread *td);
#endif /* _FUSE_IO_H_ */

904
sys/fs/fuse/fuse_ipc.c Normal file
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@ -0,0 +1,904 @@
/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/signalvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <vm/uma.h>
#include "fuse.h"
#include "fuse_node.h"
#include "fuse_ipc.h"
#include "fuse_internal.h"
#define FUSE_DEBUG_MODULE IPC
#include "fuse_debug.h"
static struct fuse_ticket *fticket_alloc(struct fuse_data *data);
static void fticket_refresh(struct fuse_ticket *ftick);
static void fticket_destroy(struct fuse_ticket *ftick);
static int fticket_wait_answer(struct fuse_ticket *ftick);
static __inline__ int
fticket_aw_pull_uio(struct fuse_ticket *ftick,
struct uio *uio);
static int fuse_body_audit(struct fuse_ticket *ftick, size_t blen);
static __inline__ void
fuse_setup_ihead(struct fuse_in_header *ihead,
struct fuse_ticket *ftick,
uint64_t nid,
enum fuse_opcode op,
size_t blen,
pid_t pid,
struct ucred *cred);
static fuse_handler_t fuse_standard_handler;
SYSCTL_NODE(_vfs, OID_AUTO, fuse, CTLFLAG_RW, 0, "FUSE tunables");
SYSCTL_STRING(_vfs_fuse, OID_AUTO, version, CTLFLAG_RD,
FUSE_FREEBSD_VERSION, 0, "fuse-freebsd version");
static int fuse_ticket_count = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, ticket_count, CTLFLAG_RW,
&fuse_ticket_count, 0, "number of allocated tickets");
static long fuse_iov_permanent_bufsize = 1 << 19;
SYSCTL_LONG(_vfs_fuse, OID_AUTO, iov_permanent_bufsize, CTLFLAG_RW,
&fuse_iov_permanent_bufsize, 0,
"limit for permanently stored buffer size for fuse_iovs");
static int fuse_iov_credit = 16;
SYSCTL_INT(_vfs_fuse, OID_AUTO, iov_credit, CTLFLAG_RW,
&fuse_iov_credit, 0,
"how many times is an oversized fuse_iov tolerated");
MALLOC_DEFINE(M_FUSEMSG, "fuse_msgbuf", "fuse message buffer");
static uma_zone_t ticket_zone;
static void
fuse_block_sigs(sigset_t *oldset)
{
sigset_t newset;
SIGFILLSET(newset);
SIGDELSET(newset, SIGKILL);
if (kern_sigprocmask(curthread, SIG_BLOCK, &newset, oldset, 0))
panic("%s: Invalid operation for kern_sigprocmask()",
__func__);
}
static void
fuse_restore_sigs(sigset_t *oldset)
{
if (kern_sigprocmask(curthread, SIG_SETMASK, oldset, NULL, 0))
panic("%s: Invalid operation for kern_sigprocmask()",
__func__);
}
void
fiov_init(struct fuse_iov *fiov, size_t size)
{
uint32_t msize = FU_AT_LEAST(size);
debug_printf("fiov=%p, size=%zd\n", fiov, size);
fiov->len = 0;
fiov->base = malloc(msize, M_FUSEMSG, M_WAITOK | M_ZERO);
fiov->allocated_size = msize;
fiov->credit = fuse_iov_credit;
}
void
fiov_teardown(struct fuse_iov *fiov)
{
debug_printf("fiov=%p\n", fiov);
MPASS(fiov->base != NULL);
free(fiov->base, M_FUSEMSG);
}
void
fiov_adjust(struct fuse_iov *fiov, size_t size)
{
debug_printf("fiov=%p, size=%zd\n", fiov, size);
if (fiov->allocated_size < size ||
(fuse_iov_permanent_bufsize >= 0 &&
fiov->allocated_size - size > fuse_iov_permanent_bufsize &&
--fiov->credit < 0)) {
fiov->base = realloc(fiov->base, FU_AT_LEAST(size), M_FUSEMSG,
M_WAITOK | M_ZERO);
if (!fiov->base) {
panic("FUSE: realloc failed");
}
fiov->allocated_size = FU_AT_LEAST(size);
fiov->credit = fuse_iov_credit;
}
fiov->len = size;
}
void
fiov_refresh(struct fuse_iov *fiov)
{
debug_printf("fiov=%p\n", fiov);
bzero(fiov->base, fiov->len);
fiov_adjust(fiov, 0);
}
static int
fticket_ctor(void *mem, int size, void *arg, int flags)
{
struct fuse_ticket *ftick = mem;
struct fuse_data *data = arg;
debug_printf("ftick=%p data=%p\n", ftick, data);
FUSE_ASSERT_MS_DONE(ftick);
FUSE_ASSERT_AW_DONE(ftick);
ftick->tk_data = data;
if (ftick->tk_unique != 0)
fticket_refresh(ftick);
/* May be truncated to 32 bits */
ftick->tk_unique = atomic_fetchadd_long(&data->ticketer, 1);
if (ftick->tk_unique == 0)
ftick->tk_unique = atomic_fetchadd_long(&data->ticketer, 1);
refcount_init(&ftick->tk_refcount, 1);
atomic_add_acq_int(&fuse_ticket_count, 1);
return 0;
}
static void
fticket_dtor(void *mem, int size, void *arg)
{
struct fuse_ticket *ftick = mem;
debug_printf("ftick=%p\n", ftick);
FUSE_ASSERT_MS_DONE(ftick);
FUSE_ASSERT_AW_DONE(ftick);
atomic_subtract_acq_int(&fuse_ticket_count, 1);
}
static int
fticket_init(void *mem, int size, int flags)
{
struct fuse_ticket *ftick = mem;
DEBUG("ftick=%p\n", ftick);
bzero(ftick, sizeof(struct fuse_ticket));
fiov_init(&ftick->tk_ms_fiov, sizeof(struct fuse_in_header));
ftick->tk_ms_type = FT_M_FIOV;
mtx_init(&ftick->tk_aw_mtx, "fuse answer delivery mutex", NULL, MTX_DEF);
fiov_init(&ftick->tk_aw_fiov, 0);
ftick->tk_aw_type = FT_A_FIOV;
return 0;
}
static void
fticket_fini(void *mem, int size)
{
struct fuse_ticket *ftick = mem;
DEBUG("ftick=%p\n", ftick);
fiov_teardown(&ftick->tk_ms_fiov);
fiov_teardown(&ftick->tk_aw_fiov);
mtx_destroy(&ftick->tk_aw_mtx);
}
static __inline struct fuse_ticket *
fticket_alloc(struct fuse_data *data)
{
return uma_zalloc_arg(ticket_zone, data, M_WAITOK);
}
static __inline void
fticket_destroy(struct fuse_ticket *ftick)
{
return uma_zfree(ticket_zone, ftick);
}
static __inline__
void
fticket_refresh(struct fuse_ticket *ftick)
{
debug_printf("ftick=%p\n", ftick);
FUSE_ASSERT_MS_DONE(ftick);
FUSE_ASSERT_AW_DONE(ftick);
fiov_refresh(&ftick->tk_ms_fiov);
ftick->tk_ms_bufdata = NULL;
ftick->tk_ms_bufsize = 0;
ftick->tk_ms_type = FT_M_FIOV;
bzero(&ftick->tk_aw_ohead, sizeof(struct fuse_out_header));
fiov_refresh(&ftick->tk_aw_fiov);
ftick->tk_aw_errno = 0;
ftick->tk_aw_bufdata = NULL;
ftick->tk_aw_bufsize = 0;
ftick->tk_aw_type = FT_A_FIOV;
ftick->tk_flag = 0;
}
static int
fticket_wait_answer(struct fuse_ticket *ftick)
{
sigset_t tset;
int err = 0;
struct fuse_data *data;
debug_printf("ftick=%p\n", ftick);
fuse_lck_mtx_lock(ftick->tk_aw_mtx);
if (fticket_answered(ftick)) {
goto out;
}
data = ftick->tk_data;
if (fdata_get_dead(data)) {
err = ENOTCONN;
fticket_set_answered(ftick);
goto out;
}
fuse_block_sigs(&tset);
err = msleep(ftick, &ftick->tk_aw_mtx, PCATCH, "fu_ans",
data->daemon_timeout * hz);
fuse_restore_sigs(&tset);
if (err == EAGAIN) { /* same as EWOULDBLOCK */
#ifdef XXXIP /* die conditionally */
if (!fdata_get_dead(data)) {
fdata_set_dead(data);
}
#endif
err = ETIMEDOUT;
fticket_set_answered(ftick);
}
out:
if (!(err || fticket_answered(ftick))) {
debug_printf("FUSE: requester was woken up but still no answer");
err = ENXIO;
}
fuse_lck_mtx_unlock(ftick->tk_aw_mtx);
return err;
}
static __inline__
int
fticket_aw_pull_uio(struct fuse_ticket *ftick, struct uio *uio)
{
int err = 0;
size_t len = uio_resid(uio);
debug_printf("ftick=%p, uio=%p\n", ftick, uio);
if (len) {
switch (ftick->tk_aw_type) {
case FT_A_FIOV:
fiov_adjust(fticket_resp(ftick), len);
err = uiomove(fticket_resp(ftick)->base, len, uio);
if (err) {
debug_printf("FUSE: FT_A_FIOV: error is %d"
" (%p, %zd, %p)\n",
err, fticket_resp(ftick)->base,
len, uio);
}
break;
case FT_A_BUF:
ftick->tk_aw_bufsize = len;
err = uiomove(ftick->tk_aw_bufdata, len, uio);
if (err) {
debug_printf("FUSE: FT_A_BUF: error is %d"
" (%p, %zd, %p)\n",
err, ftick->tk_aw_bufdata, len, uio);
}
break;
default:
panic("FUSE: unknown answer type for ticket %p", ftick);
}
}
return err;
}
int
fticket_pull(struct fuse_ticket *ftick, struct uio *uio)
{
int err = 0;
debug_printf("ftick=%p, uio=%p\n", ftick, uio);
if (ftick->tk_aw_ohead.error) {
return 0;
}
err = fuse_body_audit(ftick, uio_resid(uio));
if (!err) {
err = fticket_aw_pull_uio(ftick, uio);
}
return err;
}
struct fuse_data *
fdata_alloc(struct cdev *fdev, struct ucred *cred)
{
struct fuse_data *data;
debug_printf("fdev=%p\n", fdev);
data = malloc(sizeof(struct fuse_data), M_FUSEMSG, M_WAITOK | M_ZERO);
data->fdev = fdev;
mtx_init(&data->ms_mtx, "fuse message list mutex", NULL, MTX_DEF);
STAILQ_INIT(&data->ms_head);
mtx_init(&data->aw_mtx, "fuse answer list mutex", NULL, MTX_DEF);
TAILQ_INIT(&data->aw_head);
data->daemoncred = crhold(cred);
data->daemon_timeout = FUSE_DEFAULT_DAEMON_TIMEOUT;
sx_init(&data->rename_lock, "fuse rename lock");
data->ref = 1;
return data;
}
void
fdata_trydestroy(struct fuse_data *data)
{
DEBUG("data=%p data.mp=%p data.fdev=%p data.flags=%04x\n",
data, data->mp, data->fdev, data->dataflags);
DEBUG("destroy: data=%p\n", data);
data->ref--;
MPASS(data->ref >= 0);
if (data->ref != 0)
return;
/* Driving off stage all that stuff thrown at device... */
mtx_destroy(&data->ms_mtx);
mtx_destroy(&data->aw_mtx);
sx_destroy(&data->rename_lock);
crfree(data->daemoncred);
free(data, M_FUSEMSG);
}
void
fdata_set_dead(struct fuse_data *data)
{
debug_printf("data=%p\n", data);
FUSE_LOCK();
if (fdata_get_dead(data)) {
FUSE_UNLOCK();
return;
}
fuse_lck_mtx_lock(data->ms_mtx);
data->dataflags |= FSESS_DEAD;
wakeup_one(data);
selwakeuppri(&data->ks_rsel, PZERO + 1);
wakeup(&data->ticketer);
fuse_lck_mtx_unlock(data->ms_mtx);
FUSE_UNLOCK();
}
struct fuse_ticket *
fuse_ticket_fetch(struct fuse_data *data)
{
int err = 0;
struct fuse_ticket *ftick;
debug_printf("data=%p\n", data);
ftick = fticket_alloc(data);
if (!(data->dataflags & FSESS_INITED)) {
/* Sleep until get answer for INIT messsage */
FUSE_LOCK();
if (!(data->dataflags & FSESS_INITED) && data->ticketer > 2) {
err = msleep(&data->ticketer, &fuse_mtx, PCATCH | PDROP,
"fu_ini", 0);
if (err)
fdata_set_dead(data);
} else
FUSE_UNLOCK();
}
return ftick;
}
int
fuse_ticket_drop(struct fuse_ticket *ftick)
{
int die;
die = refcount_release(&ftick->tk_refcount);
debug_printf("ftick=%p refcount=%d\n", ftick, ftick->tk_refcount);
if (die)
fticket_destroy(ftick);
return die;
}
void
fuse_insert_callback(struct fuse_ticket *ftick, fuse_handler_t * handler)
{
debug_printf("ftick=%p, handler=%p data=%p\n", ftick, ftick->tk_data,
handler);
if (fdata_get_dead(ftick->tk_data)) {
return;
}
ftick->tk_aw_handler = handler;
fuse_lck_mtx_lock(ftick->tk_data->aw_mtx);
fuse_aw_push(ftick);
fuse_lck_mtx_unlock(ftick->tk_data->aw_mtx);
}
void
fuse_insert_message(struct fuse_ticket *ftick)
{
debug_printf("ftick=%p\n", ftick);
if (ftick->tk_flag & FT_DIRTY) {
panic("FUSE: ticket reused without being refreshed");
}
ftick->tk_flag |= FT_DIRTY;
if (fdata_get_dead(ftick->tk_data)) {
return;
}
fuse_lck_mtx_lock(ftick->tk_data->ms_mtx);
fuse_ms_push(ftick);
wakeup_one(ftick->tk_data);
selwakeuppri(&ftick->tk_data->ks_rsel, PZERO + 1);
fuse_lck_mtx_unlock(ftick->tk_data->ms_mtx);
}
static int
fuse_body_audit(struct fuse_ticket *ftick, size_t blen)
{
int err = 0;
enum fuse_opcode opcode;
debug_printf("ftick=%p, blen = %zu\n", ftick, blen);
opcode = fticket_opcode(ftick);
switch (opcode) {
case FUSE_LOOKUP:
err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
break;
case FUSE_FORGET:
panic("FUSE: a handler has been intalled for FUSE_FORGET");
break;
case FUSE_GETATTR:
err = (blen == sizeof(struct fuse_attr_out)) ? 0 : EINVAL;
break;
case FUSE_SETATTR:
err = (blen == sizeof(struct fuse_attr_out)) ? 0 : EINVAL;
break;
case FUSE_READLINK:
err = (PAGE_SIZE >= blen) ? 0 : EINVAL;
break;
case FUSE_SYMLINK:
err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
break;
case FUSE_MKNOD:
err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
break;
case FUSE_MKDIR:
err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
break;
case FUSE_UNLINK:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_RMDIR:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_RENAME:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_LINK:
err = (blen == sizeof(struct fuse_entry_out)) ? 0 : EINVAL;
break;
case FUSE_OPEN:
err = (blen == sizeof(struct fuse_open_out)) ? 0 : EINVAL;
break;
case FUSE_READ:
err = (((struct fuse_read_in *)(
(char *)ftick->tk_ms_fiov.base +
sizeof(struct fuse_in_header)
))->size >= blen) ? 0 : EINVAL;
break;
case FUSE_WRITE:
err = (blen == sizeof(struct fuse_write_out)) ? 0 : EINVAL;
break;
case FUSE_STATFS:
if (fuse_libabi_geq(ftick->tk_data, 7, 4)) {
err = (blen == sizeof(struct fuse_statfs_out)) ?
0 : EINVAL;
} else {
err = (blen == FUSE_COMPAT_STATFS_SIZE) ? 0 : EINVAL;
}
break;
case FUSE_RELEASE:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_FSYNC:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_SETXATTR:
panic("FUSE_SETXATTR implementor has forgotten to define a"
" response body format check");
break;
case FUSE_GETXATTR:
panic("FUSE_GETXATTR implementor has forgotten to define a"
" response body format check");
break;
case FUSE_LISTXATTR:
panic("FUSE_LISTXATTR implementor has forgotten to define a"
" response body format check");
break;
case FUSE_REMOVEXATTR:
panic("FUSE_REMOVEXATTR implementor has forgotten to define a"
" response body format check");
break;
case FUSE_FLUSH:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_INIT:
if (blen == sizeof(struct fuse_init_out) || blen == 8) {
err = 0;
} else {
err = EINVAL;
}
break;
case FUSE_OPENDIR:
err = (blen == sizeof(struct fuse_open_out)) ? 0 : EINVAL;
break;
case FUSE_READDIR:
err = (((struct fuse_read_in *)(
(char *)ftick->tk_ms_fiov.base +
sizeof(struct fuse_in_header)
))->size >= blen) ? 0 : EINVAL;
break;
case FUSE_RELEASEDIR:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_FSYNCDIR:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_GETLK:
panic("FUSE: no response body format check for FUSE_GETLK");
break;
case FUSE_SETLK:
panic("FUSE: no response body format check for FUSE_SETLK");
break;
case FUSE_SETLKW:
panic("FUSE: no response body format check for FUSE_SETLKW");
break;
case FUSE_ACCESS:
err = (blen == 0) ? 0 : EINVAL;
break;
case FUSE_CREATE:
err = (blen == sizeof(struct fuse_entry_out) +
sizeof(struct fuse_open_out)) ? 0 : EINVAL;
break;
case FUSE_DESTROY:
err = (blen == 0) ? 0 : EINVAL;
break;
default:
panic("FUSE: opcodes out of sync (%d)\n", opcode);
}
return err;
}
static void
fuse_setup_ihead(struct fuse_in_header *ihead,
struct fuse_ticket *ftick,
uint64_t nid,
enum fuse_opcode op,
size_t blen,
pid_t pid,
struct ucred *cred)
{
ihead->len = sizeof(*ihead) + blen;
ihead->unique = ftick->tk_unique;
ihead->nodeid = nid;
ihead->opcode = op;
debug_printf("ihead=%p, ftick=%p, nid=%ju, op=%d, blen=%zu\n",
ihead, ftick, (uintmax_t)nid, op, blen);
ihead->pid = pid;
ihead->uid = cred->cr_uid;
ihead->gid = cred->cr_rgid;
}
/*
* fuse_standard_handler just pulls indata and wakes up pretender.
* Doesn't try to interpret data, that's left for the pretender.
* Though might do a basic size verification before the pull-in takes place
*/
static int
fuse_standard_handler(struct fuse_ticket *ftick, struct uio *uio)
{
int err = 0;
debug_printf("ftick=%p, uio=%p\n", ftick, uio);
err = fticket_pull(ftick, uio);
fuse_lck_mtx_lock(ftick->tk_aw_mtx);
if (!fticket_answered(ftick)) {
fticket_set_answered(ftick);
ftick->tk_aw_errno = err;
wakeup(ftick);
}
fuse_lck_mtx_unlock(ftick->tk_aw_mtx);
return err;
}
void
fdisp_make_pid(struct fuse_dispatcher *fdip,
enum fuse_opcode op,
struct mount *mp,
uint64_t nid,
pid_t pid,
struct ucred *cred)
{
struct fuse_data *data = fuse_get_mpdata(mp);
debug_printf("fdip=%p, op=%d, mp=%p, nid=%ju\n",
fdip, op, mp, (uintmax_t)nid);
if (fdip->tick) {
fticket_refresh(fdip->tick);
} else {
fdip->tick = fuse_ticket_fetch(data);
}
FUSE_DIMALLOC(&fdip->tick->tk_ms_fiov, fdip->finh,
fdip->indata, fdip->iosize);
fuse_setup_ihead(fdip->finh, fdip->tick, nid, op, fdip->iosize, pid, cred);
}
void
fdisp_make(struct fuse_dispatcher *fdip,
enum fuse_opcode op,
struct mount *mp,
uint64_t nid,
struct thread *td,
struct ucred *cred)
{
RECTIFY_TDCR(td, cred);
return fdisp_make_pid(fdip, op, mp, nid, td->td_proc->p_pid, cred);
}
void
fdisp_make_vp(struct fuse_dispatcher *fdip,
enum fuse_opcode op,
struct vnode *vp,
struct thread *td,
struct ucred *cred)
{
debug_printf("fdip=%p, op=%d, vp=%p\n", fdip, op, vp);
RECTIFY_TDCR(td, cred);
return fdisp_make_pid(fdip, op, vnode_mount(vp), VTOI(vp),
td->td_proc->p_pid, cred);
}
int
fdisp_wait_answ(struct fuse_dispatcher *fdip)
{
int err = 0;
fdip->answ_stat = 0;
fuse_insert_callback(fdip->tick, fuse_standard_handler);
fuse_insert_message(fdip->tick);
if ((err = fticket_wait_answer(fdip->tick))) {
debug_printf("IPC: interrupted, err = %d\n", err);
fuse_lck_mtx_lock(fdip->tick->tk_aw_mtx);
if (fticket_answered(fdip->tick)) {
/*
* Just between noticing the interrupt and getting here,
* the standard handler has completed his job.
* So we drop the ticket and exit as usual.
*/
debug_printf("IPC: already answered\n");
fuse_lck_mtx_unlock(fdip->tick->tk_aw_mtx);
goto out;
} else {
/*
* So we were faster than the standard handler.
* Then by setting the answered flag we get *him*
* to drop the ticket.
*/
debug_printf("IPC: setting to answered\n");
fticket_set_answered(fdip->tick);
fuse_lck_mtx_unlock(fdip->tick->tk_aw_mtx);
return err;
}
}
debug_printf("IPC: not interrupted, err = %d\n", err);
if (fdip->tick->tk_aw_errno) {
debug_printf("IPC: explicit EIO-ing, tk_aw_errno = %d\n",
fdip->tick->tk_aw_errno);
err = EIO;
goto out;
}
if ((err = fdip->tick->tk_aw_ohead.error)) {
debug_printf("IPC: setting status to %d\n",
fdip->tick->tk_aw_ohead.error);
/*
* This means a "proper" fuse syscall error.
* We record this value so the caller will
* be able to know it's not a boring messaging
* failure, if she wishes so (and if not, she can
* just simply propagate the return value of this routine).
* [XXX Maybe a bitflag would do the job too,
* if other flags needed, this will be converted thusly.]
*/
fdip->answ_stat = err;
goto out;
}
fdip->answ = fticket_resp(fdip->tick)->base;
fdip->iosize = fticket_resp(fdip->tick)->len;
debug_printf("IPC: all is well\n");
return 0;
out:
debug_printf("IPC: dropping ticket, err = %d\n", err);
return err;
}
void
fuse_ipc_init(void)
{
ticket_zone = uma_zcreate("fuse_ticket", sizeof(struct fuse_ticket),
fticket_ctor, fticket_dtor, fticket_init, fticket_fini,
UMA_ALIGN_PTR, 0);
}
void
fuse_ipc_destroy(void)
{
uma_zdestroy(ticket_zone);
}

423
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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_IPC_H_
#define _FUSE_IPC_H_
#include <sys/param.h>
#include <sys/refcount.h>
struct fuse_iov {
void *base;
size_t len;
size_t allocated_size;
int credit;
};
void fiov_init(struct fuse_iov *fiov, size_t size);
void fiov_teardown(struct fuse_iov *fiov);
void fiov_refresh(struct fuse_iov *fiov);
void fiov_adjust(struct fuse_iov *fiov, size_t size);
#define FUSE_DIMALLOC(fiov, spc1, spc2, amnt) \
do { \
fiov_adjust(fiov, (sizeof(*(spc1)) + (amnt))); \
(spc1) = (fiov)->base; \
(spc2) = (char *)(fiov)->base + (sizeof(*(spc1))); \
} while (0)
#define FU_AT_LEAST(siz) max((siz), 160)
#define FUSE_ASSERT_AW_DONE(ftick) \
KASSERT((ftick)->tk_aw_link.tqe_next == NULL && \
(ftick)->tk_aw_link.tqe_prev == NULL, \
("FUSE: ticket still on answer delivery list %p", (ftick))) \
#define FUSE_ASSERT_MS_DONE(ftick) \
KASSERT((ftick)->tk_ms_link.stqe_next == NULL, \
("FUSE: ticket still on message list %p", (ftick)))
struct fuse_ticket;
struct fuse_data;
typedef int fuse_handler_t(struct fuse_ticket *ftick, struct uio *uio);
struct fuse_ticket {
/* fields giving the identity of the ticket */
uint64_t tk_unique;
struct fuse_data *tk_data;
int tk_flag;
u_int tk_refcount;
/* fields for initiating an upgoing message */
struct fuse_iov tk_ms_fiov;
void *tk_ms_bufdata;
size_t tk_ms_bufsize;
enum { FT_M_FIOV, FT_M_BUF } tk_ms_type;
STAILQ_ENTRY(fuse_ticket) tk_ms_link;
/* fields for handling answers coming from userspace */
struct fuse_iov tk_aw_fiov;
void *tk_aw_bufdata;
size_t tk_aw_bufsize;
enum { FT_A_FIOV, FT_A_BUF } tk_aw_type;
struct fuse_out_header tk_aw_ohead;
int tk_aw_errno;
struct mtx tk_aw_mtx;
fuse_handler_t *tk_aw_handler;
TAILQ_ENTRY(fuse_ticket) tk_aw_link;
};
#define FT_ANSW 0x01 /* request of ticket has already been answered */
#define FT_DIRTY 0x04 /* ticket has been used */
static __inline__
struct fuse_iov *
fticket_resp(struct fuse_ticket *ftick)
{
return (&ftick->tk_aw_fiov);
}
static __inline__
int
fticket_answered(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "-> ftick=%p\n", ftick);
mtx_assert(&ftick->tk_aw_mtx, MA_OWNED);
return (ftick->tk_flag & FT_ANSW);
}
static __inline__
void
fticket_set_answered(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "-> ftick=%p\n", ftick);
mtx_assert(&ftick->tk_aw_mtx, MA_OWNED);
ftick->tk_flag |= FT_ANSW;
}
static __inline__
enum fuse_opcode
fticket_opcode(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "-> ftick=%p\n", ftick);
return (((struct fuse_in_header *)(ftick->tk_ms_fiov.base))->opcode);
}
int fticket_pull(struct fuse_ticket *ftick, struct uio *uio);
enum mountpri { FM_NOMOUNTED, FM_PRIMARY, FM_SECONDARY };
/*
* The data representing a FUSE session.
*/
struct fuse_data {
struct cdev *fdev;
struct mount *mp;
struct vnode *vroot;
struct ucred *daemoncred;
int dataflags;
int ref;
struct mtx ms_mtx;
STAILQ_HEAD(, fuse_ticket) ms_head;
struct mtx aw_mtx;
TAILQ_HEAD(, fuse_ticket) aw_head;
u_long ticketer;
struct sx rename_lock;
uint32_t fuse_libabi_major;
uint32_t fuse_libabi_minor;
uint32_t max_write;
uint32_t max_read;
uint32_t subtype;
char volname[MAXPATHLEN];
struct selinfo ks_rsel;
int daemon_timeout;
uint64_t notimpl;
};
#define FSESS_DEAD 0x0001 /* session is to be closed */
#define FSESS_UNUSED0 0x0002 /* unused */
#define FSESS_INITED 0x0004 /* session has been inited */
#define FSESS_DAEMON_CAN_SPY 0x0010 /* let non-owners access this fs */
/* (and being observed by the daemon) */
#define FSESS_PUSH_SYMLINKS_IN 0x0020 /* prefix absolute symlinks with mp */
#define FSESS_DEFAULT_PERMISSIONS 0x0040 /* kernel does permission checking */
#define FSESS_NO_ATTRCACHE 0x0080 /* no attribute caching */
#define FSESS_NO_READAHEAD 0x0100 /* no readaheads */
#define FSESS_NO_DATACACHE 0x0200 /* disable buffer cache */
#define FSESS_NO_NAMECACHE 0x0400 /* disable name cache */
#define FSESS_NO_MMAP 0x0800 /* disable mmap */
#define FSESS_BROKENIO 0x1000 /* fix broken io */
extern int fuse_data_cache_enable;
extern int fuse_data_cache_invalidate;
extern int fuse_mmap_enable;
extern int fuse_sync_resize;
extern int fuse_fix_broken_io;
static __inline__
struct fuse_data *
fuse_get_mpdata(struct mount *mp)
{
return mp->mnt_data;
}
static __inline int
fsess_isimpl(struct mount *mp, int opcode)
{
struct fuse_data *data = fuse_get_mpdata(mp);
return (data->notimpl & (1ULL << opcode)) == 0;
}
static __inline void
fsess_set_notimpl(struct mount *mp, int opcode)
{
struct fuse_data *data = fuse_get_mpdata(mp);
data->notimpl |= (1ULL << opcode);
}
static __inline int
fsess_opt_datacache(struct mount *mp)
{
struct fuse_data *data = fuse_get_mpdata(mp);
return (fuse_data_cache_enable ||
(data->dataflags & FSESS_NO_DATACACHE) == 0);
}
static __inline int
fsess_opt_mmap(struct mount *mp)
{
struct fuse_data *data = fuse_get_mpdata(mp);
if (!(fuse_mmap_enable && fuse_data_cache_enable))
return 0;
return ((data->dataflags & (FSESS_NO_DATACACHE | FSESS_NO_MMAP)) == 0);
}
static __inline int
fsess_opt_brokenio(struct mount *mp)
{
struct fuse_data *data = fuse_get_mpdata(mp);
return (fuse_fix_broken_io || (data->dataflags & FSESS_BROKENIO));
}
static __inline__
void
fuse_ms_push(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "ftick=%p refcount=%d\n",
ftick, ftick->tk_refcount + 1);
mtx_assert(&ftick->tk_data->ms_mtx, MA_OWNED);
refcount_acquire(&ftick->tk_refcount);
STAILQ_INSERT_TAIL(&ftick->tk_data->ms_head, ftick, tk_ms_link);
}
static __inline__
struct fuse_ticket *
fuse_ms_pop(struct fuse_data *data)
{
struct fuse_ticket *ftick = NULL;
mtx_assert(&data->ms_mtx, MA_OWNED);
if ((ftick = STAILQ_FIRST(&data->ms_head))) {
STAILQ_REMOVE_HEAD(&data->ms_head, tk_ms_link);
#ifdef INVARIANTS
ftick->tk_ms_link.stqe_next = NULL;
#endif
}
DEBUGX(FUSE_DEBUG_IPC, "ftick=%p refcount=%d\n",
ftick, ftick ? ftick->tk_refcount : -1);
return ftick;
}
static __inline__
void
fuse_aw_push(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "ftick=%p refcount=%d\n",
ftick, ftick->tk_refcount + 1);
mtx_assert(&ftick->tk_data->aw_mtx, MA_OWNED);
refcount_acquire(&ftick->tk_refcount);
TAILQ_INSERT_TAIL(&ftick->tk_data->aw_head, ftick, tk_aw_link);
}
static __inline__
void
fuse_aw_remove(struct fuse_ticket *ftick)
{
DEBUGX(FUSE_DEBUG_IPC, "ftick=%p refcount=%d\n",
ftick, ftick->tk_refcount);
mtx_assert(&ftick->tk_data->aw_mtx, MA_OWNED);
TAILQ_REMOVE(&ftick->tk_data->aw_head, ftick, tk_aw_link);
#ifdef INVARIANTS
ftick->tk_aw_link.tqe_next = NULL;
ftick->tk_aw_link.tqe_prev = NULL;
#endif
}
static __inline__
struct fuse_ticket *
fuse_aw_pop(struct fuse_data *data)
{
struct fuse_ticket *ftick = NULL;
mtx_assert(&data->aw_mtx, MA_OWNED);
if ((ftick = TAILQ_FIRST(&data->aw_head))) {
fuse_aw_remove(ftick);
}
DEBUGX(FUSE_DEBUG_IPC, "ftick=%p refcount=%d\n",
ftick, ftick ? ftick->tk_refcount : -1);
return ftick;
}
struct fuse_ticket *fuse_ticket_fetch(struct fuse_data *data);
int fuse_ticket_drop(struct fuse_ticket *ftick);
void fuse_insert_callback(struct fuse_ticket *ftick, fuse_handler_t *handler);
void fuse_insert_message(struct fuse_ticket *ftick);
static __inline__
int
fuse_libabi_geq(struct fuse_data *data, uint32_t abi_maj, uint32_t abi_min)
{
return (data->fuse_libabi_major > abi_maj ||
(data->fuse_libabi_major == abi_maj && data->fuse_libabi_minor >= abi_min));
}
struct fuse_data *fdata_alloc(struct cdev *dev, struct ucred *cred);
void fdata_trydestroy(struct fuse_data *data);
void fdata_set_dead(struct fuse_data *data);
static __inline__
int
fdata_get_dead(struct fuse_data *data)
{
return (data->dataflags & FSESS_DEAD);
}
struct fuse_dispatcher {
struct fuse_ticket *tick;
struct fuse_in_header *finh;
void *indata;
size_t iosize;
uint64_t nodeid;
int answ_stat;
void *answ;
};
static __inline__
void
fdisp_init(struct fuse_dispatcher *fdisp, size_t iosize)
{
DEBUGX(FUSE_DEBUG_IPC, "-> fdisp=%p, iosize=%zx\n", fdisp, iosize);
fdisp->iosize = iosize;
fdisp->tick = NULL;
}
static __inline__
void
fdisp_destroy(struct fuse_dispatcher *fdisp)
{
DEBUGX(FUSE_DEBUG_IPC, "-> fdisp=%p, ftick=%p\n", fdisp, fdisp->tick);
fuse_ticket_drop(fdisp->tick);
#ifdef INVARIANTS
fdisp->tick = NULL;
#endif
}
void fdisp_make(struct fuse_dispatcher *fdip, enum fuse_opcode op,
struct mount *mp, uint64_t nid, struct thread *td,
struct ucred *cred);
void fdisp_make_pid(struct fuse_dispatcher *fdip, enum fuse_opcode op,
struct mount *mp, uint64_t nid, pid_t pid,
struct ucred *cred);
void fdisp_make_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op,
struct vnode *vp, struct thread *td, struct ucred *cred);
int fdisp_wait_answ(struct fuse_dispatcher *fdip);
static __inline__
int
fdisp_simple_putget_vp(struct fuse_dispatcher *fdip, enum fuse_opcode op,
struct vnode *vp, struct thread *td, struct ucred *cred)
{
DEBUGX(FUSE_DEBUG_IPC, "-> fdip=%p, opcode=%d, vp=%p\n", fdip, op, vp);
fdisp_make_vp(fdip, op, vp, td, cred);
return fdisp_wait_answ(fdip);
}
#endif /* _FUSE_IPC_H_ */

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/*-
* This file defines the kernel interface of FUSE
* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
*
* This program can be distributed under the terms of the GNU GPL.
* See the file COPYING.
*
* This -- and only this -- header file may also be distributed under
* the terms of the BSD Licence as follows:
*
* Copyright (C) 2001-2007 Miklos Szeredi. 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef linux
#include <sys/types.h>
#define __u64 uint64_t
#define __u32 uint32_t
#define __s32 int32_t
#else
#include <asm/types.h>
#include <linux/major.h>
#endif
/** Version number of this interface */
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 8
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
/** The major number of the fuse character device */
#define FUSE_MAJOR MISC_MAJOR
/** The minor number of the fuse character device */
#define FUSE_MINOR 229
/* Make sure all structures are padded to 64bit boundary, so 32bit
userspace works under 64bit kernels */
struct fuse_attr {
__u64 ino;
__u64 size;
__u64 blocks;
__u64 atime;
__u64 mtime;
__u64 ctime;
__u32 atimensec;
__u32 mtimensec;
__u32 ctimensec;
__u32 mode;
__u32 nlink;
__u32 uid;
__u32 gid;
__u32 rdev;
};
struct fuse_kstatfs {
__u64 blocks;
__u64 bfree;
__u64 bavail;
__u64 files;
__u64 ffree;
__u32 bsize;
__u32 namelen;
__u32 frsize;
__u32 padding;
__u32 spare[6];
};
struct fuse_file_lock {
__u64 start;
__u64 end;
__u32 type;
__u32 pid; /* tgid */
};
/**
* Bitmasks for fuse_setattr_in.valid
*/
#define FATTR_MODE (1 << 0)
#define FATTR_UID (1 << 1)
#define FATTR_GID (1 << 2)
#define FATTR_SIZE (1 << 3)
#define FATTR_ATIME (1 << 4)
#define FATTR_MTIME (1 << 5)
#define FATTR_FH (1 << 6)
/**
* Flags returned by the OPEN request
*
* FOPEN_DIRECT_IO: bypass page cache for this open file
* FOPEN_KEEP_CACHE: don't invalidate the data cache on open
*/
#define FOPEN_DIRECT_IO (1 << 0)
#define FOPEN_KEEP_CACHE (1 << 1)
/**
* INIT request/reply flags
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
/**
* Release flags
*/
#define FUSE_RELEASE_FLUSH (1 << 0)
enum fuse_opcode {
FUSE_LOOKUP = 1,
FUSE_FORGET = 2, /* no reply */
FUSE_GETATTR = 3,
FUSE_SETATTR = 4,
FUSE_READLINK = 5,
FUSE_SYMLINK = 6,
FUSE_MKNOD = 8,
FUSE_MKDIR = 9,
FUSE_UNLINK = 10,
FUSE_RMDIR = 11,
FUSE_RENAME = 12,
FUSE_LINK = 13,
FUSE_OPEN = 14,
FUSE_READ = 15,
FUSE_WRITE = 16,
FUSE_STATFS = 17,
FUSE_RELEASE = 18,
FUSE_FSYNC = 20,
FUSE_SETXATTR = 21,
FUSE_GETXATTR = 22,
FUSE_LISTXATTR = 23,
FUSE_REMOVEXATTR = 24,
FUSE_FLUSH = 25,
FUSE_INIT = 26,
FUSE_OPENDIR = 27,
FUSE_READDIR = 28,
FUSE_RELEASEDIR = 29,
FUSE_FSYNCDIR = 30,
FUSE_GETLK = 31,
FUSE_SETLK = 32,
FUSE_SETLKW = 33,
FUSE_ACCESS = 34,
FUSE_CREATE = 35,
FUSE_INTERRUPT = 36,
FUSE_BMAP = 37,
FUSE_DESTROY = 38,
};
/* The read buffer is required to be at least 8k, but may be much larger */
#define FUSE_MIN_READ_BUFFER 8192
struct fuse_entry_out {
__u64 nodeid; /* Inode ID */
__u64 generation; /* Inode generation: nodeid:gen must
be unique for the fs's lifetime */
__u64 entry_valid; /* Cache timeout for the name */
__u64 attr_valid; /* Cache timeout for the attributes */
__u32 entry_valid_nsec;
__u32 attr_valid_nsec;
struct fuse_attr attr;
};
struct fuse_forget_in {
__u64 nlookup;
};
struct fuse_attr_out {
__u64 attr_valid; /* Cache timeout for the attributes */
__u32 attr_valid_nsec;
__u32 dummy;
struct fuse_attr attr;
};
struct fuse_mkdir_in {
__u32 mode;
__u32 padding;
};
struct fuse_rename_in {
__u64 newdir;
};
struct fuse_link_in {
__u64 oldnodeid;
};
struct fuse_setattr_in {
__u32 valid;
__u32 padding;
__u64 fh;
__u64 size;
__u64 unused1;
__u64 atime;
__u64 mtime;
__u64 unused2;
__u32 atimensec;
__u32 mtimensec;
__u32 unused3;
__u32 mode;
__u32 unused4;
__u32 uid;
__u32 gid;
__u32 unused5;
};
struct fuse_open_in {
__u32 flags;
__u32 mode;
};
struct fuse_open_out {
__u64 fh;
__u32 open_flags;
__u32 padding;
};
struct fuse_release_in {
__u64 fh;
__u32 flags;
__u32 release_flags;
__u64 lock_owner;
};
struct fuse_flush_in {
__u64 fh;
__u32 unused;
__u32 padding;
__u64 lock_owner;
};
struct fuse_read_in {
__u64 fh;
__u64 offset;
__u32 size;
__u32 padding;
};
struct fuse_write_in {
__u64 fh;
__u64 offset;
__u32 size;
__u32 write_flags;
};
struct fuse_write_out {
__u32 size;
__u32 padding;
};
#define FUSE_COMPAT_STATFS_SIZE 48
struct fuse_statfs_out {
struct fuse_kstatfs st;
};
struct fuse_fsync_in {
__u64 fh;
__u32 fsync_flags;
__u32 padding;
};
struct fuse_setxattr_in {
__u32 size;
__u32 flags;
};
struct fuse_getxattr_in {
__u32 size;
__u32 padding;
};
struct fuse_getxattr_out {
__u32 size;
__u32 padding;
};
struct fuse_lk_in {
__u64 fh;
__u64 owner;
struct fuse_file_lock lk;
};
struct fuse_lk_out {
struct fuse_file_lock lk;
};
struct fuse_access_in {
__u32 mask;
__u32 padding;
};
struct fuse_init_in {
__u32 major;
__u32 minor;
__u32 max_readahead;
__u32 flags;
};
struct fuse_init_out {
__u32 major;
__u32 minor;
__u32 max_readahead;
__u32 flags;
__u32 unused;
__u32 max_write;
};
struct fuse_interrupt_in {
__u64 unique;
};
struct fuse_bmap_in {
__u64 block;
__u32 blocksize;
__u32 padding;
};
struct fuse_bmap_out {
__u64 block;
};
struct fuse_in_header {
__u32 len;
__u32 opcode;
__u64 unique;
__u64 nodeid;
__u32 uid;
__u32 gid;
__u32 pid;
__u32 padding;
};
struct fuse_out_header {
__u32 len;
__s32 error;
__u64 unique;
};
struct fuse_dirent {
__u64 ino;
__u64 off;
__u32 namelen;
__u32 type;
char name[0];
};
#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
#define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
#define FUSE_DIRENT_SIZE(d) \
FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)

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/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/buf.h>
#include <sys/sysctl.h>
#include "fuse.h"
static void fuse_bringdown(eventhandler_tag eh_tag);
static int fuse_loader(struct module *m, int what, void *arg);
struct mtx fuse_mtx;
extern struct vfsops fuse_vfsops;
extern struct cdevsw fuse_cdevsw;
extern struct vop_vector fuse_vnops;
extern int fuse_pbuf_freecnt;
static struct vfsconf fuse_vfsconf = {
.vfc_version = VFS_VERSION,
.vfc_name = "fusefs",
.vfc_vfsops = &fuse_vfsops,
.vfc_typenum = -1,
.vfc_flags = VFCF_SYNTHETIC
};
SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_major, CTLFLAG_RD,
0, FUSE_KERNEL_VERSION, "FUSE kernel abi major version");
SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_minor, CTLFLAG_RD,
0, FUSE_KERNEL_MINOR_VERSION, "FUSE kernel abi minor version");
/******************************
*
* >>> Module management stuff
*
******************************/
static void
fuse_bringdown(eventhandler_tag eh_tag)
{
fuse_ipc_destroy();
fuse_device_destroy();
mtx_destroy(&fuse_mtx);
}
static int
fuse_loader(struct module *m, int what, void *arg)
{
static eventhandler_tag eh_tag = NULL;
int err = 0;
switch (what) {
case MOD_LOAD: /* kldload */
fuse_pbuf_freecnt = nswbuf / 2 + 1;
mtx_init(&fuse_mtx, "fuse_mtx", NULL, MTX_DEF);
err = fuse_device_init();
if (err) {
mtx_destroy(&fuse_mtx);
return (err);
}
fuse_ipc_init();
/* vfs_modevent ignores its first arg */
if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
fuse_bringdown(eh_tag);
else
printf("fuse-freebsd: version %s, FUSE ABI %d.%d\n",
FUSE_FREEBSD_VERSION,
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
break;
case MOD_UNLOAD:
if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
return (err);
fuse_bringdown(eh_tag);
break;
default:
return (EINVAL);
}
return (err);
}
/* Registering the module */
static moduledata_t fuse_moddata = {
"fuse",
fuse_loader,
&fuse_vfsconf
};
DECLARE_MODULE(fuse, fuse_moddata, SI_SUB_VFS, SI_ORDER_MIDDLE);
MODULE_VERSION(fuse, 1);

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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <sys/fcntl.h>
#include <sys/fnv_hash.h>
#include <sys/priv.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include "fuse.h"
#include "fuse_node.h"
#include "fuse_internal.h"
#include "fuse_io.h"
#include "fuse_ipc.h"
#define FUSE_DEBUG_MODULE VNOPS
#include "fuse_debug.h"
MALLOC_DEFINE(M_FUSEVN, "fuse_vnode", "fuse vnode private data");
static int fuse_node_count = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, node_count, CTLFLAG_RD,
&fuse_node_count, 0, "");
int fuse_data_cache_enable = 1;
SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_enable, CTLFLAG_RW,
&fuse_data_cache_enable, 0, "");
int fuse_data_cache_invalidate = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_invalidate, CTLFLAG_RW,
&fuse_data_cache_invalidate, 0, "");
int fuse_mmap_enable = 1;
SYSCTL_INT(_vfs_fuse, OID_AUTO, mmap_enable, CTLFLAG_RW,
&fuse_mmap_enable, 0, "");
int fuse_refresh_size = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, refresh_size, CTLFLAG_RW,
&fuse_refresh_size, 0, "");
int fuse_sync_resize = 1;
SYSCTL_INT(_vfs_fuse, OID_AUTO, sync_resize, CTLFLAG_RW,
&fuse_sync_resize, 0, "");
int fuse_fix_broken_io = 0;
SYSCTL_INT(_vfs_fuse, OID_AUTO, fix_broken_io, CTLFLAG_RW,
&fuse_fix_broken_io, 0, "");
static void
fuse_vnode_init(struct vnode *vp, struct fuse_vnode_data *fvdat,
uint64_t nodeid, enum vtype vtyp)
{
int i;
fvdat->nid = nodeid;
if (nodeid == FUSE_ROOT_ID) {
vp->v_vflag |= VV_ROOT;
}
vp->v_type = vtyp;
vp->v_data = fvdat;
for (i = 0; i < FUFH_MAXTYPE; i++)
fvdat->fufh[i].fh_type = FUFH_INVALID;
atomic_add_acq_int(&fuse_node_count, 1);
}
void
fuse_vnode_destroy(struct vnode *vp)
{
struct fuse_vnode_data *fvdat = vp->v_data;
vp->v_data = NULL;
free(fvdat, M_FUSEVN);
atomic_subtract_acq_int(&fuse_node_count, 1);
}
static int
fuse_vnode_cmp(struct vnode *vp, void *nidp)
{
return (VTOI(vp) != *((uint64_t *)nidp));
}
static uint32_t __inline
fuse_vnode_hash(uint64_t id)
{
return (fnv_32_buf(&id, sizeof(id), FNV1_32_INIT));
}
static int
fuse_vnode_alloc(struct mount *mp,
struct thread *td,
uint64_t nodeid,
enum vtype vtyp,
struct vnode **vpp)
{
struct fuse_vnode_data *fvdat;
struct vnode *vp2;
int err = 0;
DEBUG("been asked for vno #%ju\n", (uintmax_t)nodeid);
if (vtyp == VNON) {
return EINVAL;
}
*vpp = NULL;
err = vfs_hash_get(mp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE, td, vpp,
fuse_vnode_cmp, &nodeid);
if (err)
return (err);
if (*vpp) {
MPASS((*vpp)->v_type == vtyp && (*vpp)->v_data != NULL);
DEBUG("vnode taken from hash\n");
return (0);
}
fvdat = malloc(sizeof(*fvdat), M_FUSEVN, M_WAITOK | M_ZERO);
err = getnewvnode("fuse", mp, &fuse_vnops, vpp);
if (err) {
free(fvdat, M_FUSEVN);
return (err);
}
lockmgr((*vpp)->v_vnlock, LK_EXCLUSIVE, NULL);
fuse_vnode_init(*vpp, fvdat, nodeid, vtyp);
err = insmntque(*vpp, mp);
ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
if (err) {
free(fvdat, M_FUSEVN);
*vpp = NULL;
return (err);
}
err = vfs_hash_insert(*vpp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE,
td, &vp2, fuse_vnode_cmp, &nodeid);
if (err)
return (err);
if (vp2 != NULL) {
*vpp = vp2;
return (0);
}
ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
return (0);
}
int
fuse_vnode_get(struct mount *mp,
uint64_t nodeid,
struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum vtype vtyp)
{
struct thread *td = (cnp != NULL ? cnp->cn_thread : curthread);
int err = 0;
debug_printf("dvp=%p\n", dvp);
err = fuse_vnode_alloc(mp, td, nodeid, vtyp, vpp);
if (err) {
return err;
}
if (dvp != NULL) {
MPASS((cnp->cn_flags & ISDOTDOT) == 0);
MPASS(!(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.'));
fuse_vnode_setparent(*vpp, dvp);
}
if (dvp != NULL && cnp != NULL && (cnp->cn_flags & MAKEENTRY) != 0) {
ASSERT_VOP_LOCKED(*vpp, "fuse_vnode_get");
ASSERT_VOP_LOCKED(dvp, "fuse_vnode_get");
cache_enter(dvp, *vpp, cnp);
}
/*
* In userland, libfuse uses cached lookups for dot and dotdot entries,
* thus it does not really bump the nlookup counter for forget.
* Follow the same semantic and avoid tu bump it in order to keep
* nlookup counters consistent.
*/
if (cnp == NULL || ((cnp->cn_flags & ISDOTDOT) == 0 &&
(cnp->cn_namelen != 1 || cnp->cn_nameptr[0] != '.')))
VTOFUD(*vpp)->nlookup++;
return 0;
}
void
fuse_vnode_open(struct vnode *vp, int32_t fuse_open_flags, struct thread *td)
{
/*
* Funcation is called for every vnode open.
* Merge fuse_open_flags it may be 0
*
* XXXIP: Handle FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE
*/
if (vnode_vtype(vp) == VREG) {
/* XXXIP prevent getattr, by using cached node size */
vnode_create_vobject(vp, 0, td);
}
}
int
fuse_isvalid_attr(struct vnode *vp)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct timespec uptsp;
nanouptime(&uptsp);
return fuse_timespec_cmp(&uptsp, &fvdat->cached_attrs_valid, <=);
}
int
fuse_vnode_savesize(struct vnode *vp, struct ucred *cred)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct thread *td = curthread;
struct fuse_filehandle *fufh = NULL;
struct fuse_dispatcher fdi;
struct fuse_setattr_in *fsai;
int err = 0;
DEBUG("inode=%ju size=%ju\n", (uintmax_t)VTOI(vp),
(uintmax_t)fvdat->filesize);
ASSERT_VOP_ELOCKED(vp, "fuse_io_extend");
if (fuse_isdeadfs(vp)) {
return EBADF;
}
if (vnode_vtype(vp) == VDIR) {
return EISDIR;
}
if (vfs_isrdonly(vnode_mount(vp))) {
return EROFS;
}
if (cred == NULL) {
cred = td->td_ucred;
}
fdisp_init(&fdi, sizeof(*fsai));
fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
fsai = fdi.indata;
fsai->valid = 0;
/* Truncate to a new value. */
fsai->size = fvdat->filesize;
fsai->valid |= FATTR_SIZE;
fuse_filehandle_getrw(vp, FUFH_WRONLY, &fufh);
if (fufh) {
fsai->fh = fufh->fh_id;
fsai->valid |= FATTR_FH;
}
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
if (err == 0)
fvdat->flag &= ~FN_SIZECHANGE;
fuse_invalidate_attr(vp);
return err;
}
void
fuse_vnode_refreshsize(struct vnode *vp, struct ucred *cred)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct vattr va;
if ((fvdat->flag & FN_SIZECHANGE) != 0 ||
(fuse_refresh_size == 0 && fvdat->filesize != 0) ||
fuse_isvalid_attr(vp))
return;
VOP_GETATTR(vp, &va, cred);
DEBUG("refreshed file size: %jd\n", (intmax_t)VTOFUD(vp)->filesize);
}
int
fuse_vnode_setsize(struct vnode *vp, struct ucred *cred, off_t newsize)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
off_t oldsize;
int err = 0;
DEBUG("inode=%ju oldsize=%ju newsize=%ju\n",
(uintmax_t)VTOI(vp), (uintmax_t)fvdat->filesize,
(uintmax_t)newsize);
ASSERT_VOP_ELOCKED(vp, "fuse_vnode_setsize");
oldsize = fvdat->filesize;
fvdat->filesize = newsize;
fvdat->flag |= FN_SIZECHANGE;
if (newsize < oldsize) {
err = vtruncbuf(vp, cred, newsize, fuse_iosize(vp));
}
vnode_pager_setsize(vp, newsize);
fuse_invalidate_attr(vp);
return err;
}

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/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_NODE_H_
#define _FUSE_NODE_H_
#include <sys/types.h>
#include <sys/mutex.h>
#include "fuse_file.h"
#define FN_REVOKED 0x00000020
#define FN_FLUSHINPROG 0x00000040
#define FN_FLUSHWANT 0x00000080
#define FN_SIZECHANGE 0x00000100
struct fuse_vnode_data {
/** self **/
uint64_t nid;
/** parent **/
/* XXXIP very likely to be stale, it's not updated in rename() */
uint64_t parent_nid;
/** I/O **/
struct fuse_filehandle fufh[FUFH_MAXTYPE];
/** flags **/
uint32_t flag;
/** meta **/
struct timespec cached_attrs_valid;
struct vattr cached_attrs;
off_t filesize;
uint64_t nlookup;
enum vtype vtype;
};
#define VTOFUD(vp) \
((struct fuse_vnode_data *)((vp)->v_data))
#define VTOI(vp) (VTOFUD(vp)->nid)
#define VTOVA(vp) (&(VTOFUD(vp)->cached_attrs))
#define VTOILLU(vp) ((uint64_t)(VTOFUD(vp) ? VTOI(vp) : 0))
#define FUSE_NULL_ID 0
extern struct vop_vector fuse_vnops;
static __inline__
void
fuse_invalidate_attr(struct vnode *vp)
{
if (VTOFUD(vp)) {
bzero(&VTOFUD(vp)->cached_attrs_valid, sizeof(struct timespec));
}
}
static __inline void
fuse_vnode_setparent(struct vnode *vp, struct vnode *dvp)
{
if (dvp != NULL && vp->v_type == VDIR) {
MPASS(dvp->v_type == VDIR);
VTOFUD(vp)->parent_nid = VTOI(dvp);
}
}
int fuse_isvalid_attr(struct vnode *vp);
void fuse_vnode_destroy(struct vnode *vp);
int fuse_vnode_get(struct mount *mp,
uint64_t nodeid,
struct vnode *dvp,
struct vnode **vpp,
struct componentname *cnp,
enum vtype vtyp);
void fuse_vnode_open(struct vnode *vp,
int32_t fuse_open_flags,
struct thread *td);
void fuse_vnode_refreshsize(struct vnode *vp, struct ucred *cred);
int fuse_vnode_savesize(struct vnode *vp, struct ucred *cred);
int fuse_vnode_setsize(struct vnode *vp, struct ucred *cred, off_t newsize);
#endif /* _FUSE_NODE_H_ */

80
sys/fs/fuse/fuse_param.h Normal file
View file

@ -0,0 +1,80 @@
/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* $FreeBSD$
*/
#ifndef _FUSE_PARAM_H_
#define _FUSE_PARAM_H_
/*
* This is the prefix ("fuse" by default) of the name of a FUSE device node
* in devfs. The suffix is the device number. "/dev/fuse0" is the first FUSE
* device by default. If you change the prefix from the default to something
* else, the user-space FUSE library will need to know about it too.
*/
#define FUSE_DEVICE_BASENAME "fuse"
/*
* This is the number of /dev/fuse<n> nodes we will create. <n> goes from
* 0 to (FUSE_NDEVICES - 1).
*/
#define FUSE_NDEVICES 16
/*
* This is the default block size of the virtual storage devices that are
* implicitly implemented by the FUSE kernel extension. This can be changed
* on a per-mount basis (there's one such virtual device for each mount).
*/
#define FUSE_DEFAULT_BLOCKSIZE 4096
/*
* This is default I/O size used while accessing the virtual storage devices.
* This can be changed on a per-mount basis.
*/
#define FUSE_DEFAULT_IOSIZE 4096
#ifdef KERNEL
/*
* This is the soft upper limit on the number of "request tickets" FUSE's
* user-kernel IPC layer can have for a given mount. This can be modified
* through the fuse.* sysctl interface.
*/
#define FUSE_DEFAULT_MAX_FREE_TICKETS 1024
#define FUSE_DEFAULT_IOV_PERMANENT_BUFSIZE (1L << 19)
#define FUSE_DEFAULT_IOV_CREDIT 16
#endif
#define FUSE_LINK_MAX LINK_MAX
#endif /* _FUSE_PARAM_H_ */

533
sys/fs/fuse/fuse_vfsops.c Normal file
View file

@ -0,0 +1,533 @@
/*
* Copyright (c) 2007-2009 Google Inc. and Amit Singh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* OWNER 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.
*
* Copyright (C) 2005 Csaba Henk.
* 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 AUTHOR AND CONTRIBUTORS ``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 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/capability.h>
#include <sys/conf.h>
#include <sys/filedesc.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/namei.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <sys/fcntl.h>
#include "fuse.h"
#include "fuse_param.h"
#include "fuse_node.h"
#include "fuse_ipc.h"
#include "fuse_internal.h"
#include <sys/priv.h>
#include <security/mac/mac_framework.h>
#define FUSE_DEBUG_MODULE VFSOPS
#include "fuse_debug.h"
/* This will do for privilege types for now */
#ifndef PRIV_VFS_FUSE_ALLOWOTHER
#define PRIV_VFS_FUSE_ALLOWOTHER PRIV_VFS_MOUNT_NONUSER
#endif
#ifndef PRIV_VFS_FUSE_MOUNT_NONUSER
#define PRIV_VFS_FUSE_MOUNT_NONUSER PRIV_VFS_MOUNT_NONUSER
#endif
#ifndef PRIV_VFS_FUSE_SYNC_UNMOUNT
#define PRIV_VFS_FUSE_SYNC_UNMOUNT PRIV_VFS_MOUNT_NONUSER
#endif
static vfs_mount_t fuse_vfsop_mount;
static vfs_unmount_t fuse_vfsop_unmount;
static vfs_root_t fuse_vfsop_root;
static vfs_statfs_t fuse_vfsop_statfs;
struct vfsops fuse_vfsops = {
.vfs_mount = fuse_vfsop_mount,
.vfs_unmount = fuse_vfsop_unmount,
.vfs_root = fuse_vfsop_root,
.vfs_statfs = fuse_vfsop_statfs,
};
SYSCTL_INT(_vfs_fuse, OID_AUTO, init_backgrounded, CTLFLAG_RD,
0, 1, "indicate async handshake");
static int fuse_enforce_dev_perms = 0;
SYSCTL_LONG(_vfs_fuse, OID_AUTO, enforce_dev_perms, CTLFLAG_RW,
&fuse_enforce_dev_perms, 0,
"enforce fuse device permissions for secondary mounts");
static unsigned sync_unmount = 1;
SYSCTL_UINT(_vfs_fuse, OID_AUTO, sync_unmount, CTLFLAG_RW,
&sync_unmount, 0, "specify when to use synchronous unmount");
MALLOC_DEFINE(M_FUSEVFS, "fuse_filesystem", "buffer for fuse vfs layer");
static int
fuse_getdevice(const char *fspec, struct thread *td, struct cdev **fdevp)
{
struct nameidata nd, *ndp = &nd;
struct vnode *devvp;
struct cdev *fdev;
int err;
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible disk device.
*/
NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, fspec, td);
if ((err = namei(ndp)) != 0)
return err;
NDFREE(ndp, NDF_ONLY_PNBUF);
devvp = ndp->ni_vp;
if (devvp->v_type != VCHR) {
vrele(devvp);
return ENXIO;
}
fdev = devvp->v_rdev;
dev_ref(fdev);
if (fuse_enforce_dev_perms) {
/*
* Check if mounter can open the fuse device.
*
* This has significance only if we are doing a secondary mount
* which doesn't involve actually opening fuse devices, but we
* still want to enforce the permissions of the device (in
* order to keep control over the circle of fuse users).
*
* (In case of primary mounts, we are either the superuser so
* we can do anything anyway, or we can mount only if the
* device is already opened by us, ie. we are permitted to open
* the device.)
*/
#if 0
#ifdef MAC
err = mac_check_vnode_open(td->td_ucred, devvp, VREAD | VWRITE);
if (!err)
#endif
#endif /* 0 */
err = VOP_ACCESS(devvp, VREAD | VWRITE, td->td_ucred, td);
if (err) {
vrele(devvp);
dev_rel(fdev);
return err;
}
}
/*
* according to coda code, no extra lock is needed --
* although in sys/vnode.h this field is marked "v"
*/
vrele(devvp);
if (!fdev->si_devsw ||
strcmp("fuse", fdev->si_devsw->d_name)) {
dev_rel(fdev);
return ENXIO;
}
*fdevp = fdev;
return 0;
}
#define FUSE_FLAGOPT(fnam, fval) do { \
vfs_flagopt(opts, #fnam, &mntopts, fval); \
vfs_flagopt(opts, "__" #fnam, &__mntopts, fval); \
} while (0)
static int
fuse_vfsop_mount(struct mount *mp)
{
int err;
uint64_t mntopts, __mntopts;
int max_read_set;
uint32_t max_read;
int daemon_timeout;
int fd;
size_t len;
struct cdev *fdev;
struct fuse_data *data;
struct thread *td;
struct file *fp, *fptmp;
char *fspec, *subtype;
struct vfsoptlist *opts;
subtype = NULL;
max_read_set = 0;
max_read = ~0;
err = 0;
mntopts = 0;
__mntopts = 0;
td = curthread;
fuse_trace_printf_vfsop();
if (mp->mnt_flag & MNT_UPDATE)
return EOPNOTSUPP;
mp->mnt_flag |= MNT_SYNCHRONOUS;
mp->mnt_data = NULL;
/* Get the new options passed to mount */
opts = mp->mnt_optnew;
if (!opts)
return EINVAL;
/* `fspath' contains the mount point (eg. /mnt/fuse/sshfs); REQUIRED */
if (!vfs_getopts(opts, "fspath", &err))
return err;
/* `from' contains the device name (eg. /dev/fuse0); REQUIRED */
fspec = vfs_getopts(opts, "from", &err);
if (!fspec)
return err;
/* `fd' contains the filedescriptor for this session; REQUIRED */
if (vfs_scanopt(opts, "fd", "%d", &fd) != 1)
return EINVAL;
err = fuse_getdevice(fspec, td, &fdev);
if (err != 0)
return err;
/*
* With the help of underscored options the mount program
* can inform us from the flags it sets by default
*/
FUSE_FLAGOPT(allow_other, FSESS_DAEMON_CAN_SPY);
FUSE_FLAGOPT(push_symlinks_in, FSESS_PUSH_SYMLINKS_IN);
FUSE_FLAGOPT(default_permissions, FSESS_DEFAULT_PERMISSIONS);
FUSE_FLAGOPT(no_attrcache, FSESS_NO_ATTRCACHE);
FUSE_FLAGOPT(no_readahed, FSESS_NO_READAHEAD);
FUSE_FLAGOPT(no_datacache, FSESS_NO_DATACACHE);
FUSE_FLAGOPT(no_namecache, FSESS_NO_NAMECACHE);
FUSE_FLAGOPT(no_mmap, FSESS_NO_MMAP);
FUSE_FLAGOPT(brokenio, FSESS_BROKENIO);
if (vfs_scanopt(opts, "max_read=", "%u", &max_read) == 1)
max_read_set = 1;
if (vfs_scanopt(opts, "timeout=", "%u", &daemon_timeout) == 1) {
if (daemon_timeout < FUSE_MIN_DAEMON_TIMEOUT)
daemon_timeout = FUSE_MIN_DAEMON_TIMEOUT;
else if (daemon_timeout > FUSE_MAX_DAEMON_TIMEOUT)
daemon_timeout = FUSE_MAX_DAEMON_TIMEOUT;
} else {
daemon_timeout = FUSE_DEFAULT_DAEMON_TIMEOUT;
}
subtype = vfs_getopts(opts, "subtype=", &err);
DEBUG2G("mntopts 0x%jx\n", (uintmax_t)mntopts);
err = fget(td, fd, CAP_READ, &fp);
if (err != 0) {
DEBUG("invalid or not opened device: data=%p\n", data);
goto out;
}
fptmp = td->td_fpop;
td->td_fpop = fp;
err = devfs_get_cdevpriv((void **)&data);
td->td_fpop = fptmp;
fdrop(fp, td);
FUSE_LOCK();
if (err != 0 || data == NULL || data->mp != NULL) {
DEBUG("invalid or not opened device: data=%p data.mp=%p\n",
data, data != NULL ? data->mp : NULL);
err = ENXIO;
FUSE_UNLOCK();
goto out;
}
if (fdata_get_dead(data)) {
DEBUG("device is dead during mount: data=%p\n", data);
err = ENOTCONN;
FUSE_UNLOCK();
goto out;
}
/* Sanity + permission checks */
if (!data->daemoncred)
panic("fuse daemon found, but identity unknown");
if (mntopts & FSESS_DAEMON_CAN_SPY)
err = priv_check(td, PRIV_VFS_FUSE_ALLOWOTHER);
if (err == 0 && td->td_ucred->cr_uid != data->daemoncred->cr_uid)
/* are we allowed to do the first mount? */
err = priv_check(td, PRIV_VFS_FUSE_MOUNT_NONUSER);
if (err) {
FUSE_UNLOCK();
goto out;
}
/* We need this here as this slot is used by getnewvnode() */
mp->mnt_stat.f_iosize = PAGE_SIZE;
mp->mnt_data = data;
data->ref++;
data->mp = mp;
data->dataflags |= mntopts;
data->max_read = max_read;
data->daemon_timeout = daemon_timeout;
#ifdef XXXIP
if (!priv_check(td, PRIV_VFS_FUSE_SYNC_UNMOUNT))
data->dataflags |= FSESS_CAN_SYNC_UNMOUNT;
#endif
FUSE_UNLOCK();
vfs_getnewfsid(mp);
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_kern_flag |= MNTK_MPSAFE;
if (subtype) {
strlcat(mp->mnt_stat.f_fstypename, ".", MFSNAMELEN);
strlcat(mp->mnt_stat.f_fstypename, subtype, MFSNAMELEN);
}
copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &len);
bzero(mp->mnt_stat.f_mntfromname + len, MNAMELEN - len);
DEBUG2G("mp %p: %s\n", mp, mp->mnt_stat.f_mntfromname);
/* Now handshaking with daemon */
fuse_internal_send_init(data, td);
out:
if (err) {
FUSE_LOCK();
if (data->mp == mp) {
/*
* Destroy device only if we acquired reference to
* it
*/
DEBUG("mount failed, destroy device: data=%p mp=%p"
" err=%d\n",
data, mp, err);
data->mp = NULL;
fdata_trydestroy(data);
}
FUSE_UNLOCK();
dev_rel(fdev);
}
return err;
}
static int
fuse_vfsop_unmount(struct mount *mp, int mntflags)
{
int err = 0;
int flags = 0;
struct cdev *fdev;
struct fuse_data *data;
struct fuse_dispatcher fdi;
struct thread *td = curthread;
fuse_trace_printf_vfsop();
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
data = fuse_get_mpdata(mp);
if (!data) {
panic("no private data for mount point?");
}
/* There is 1 extra root vnode reference (mp->mnt_data). */
FUSE_LOCK();
if (data->vroot != NULL) {
struct vnode *vroot = data->vroot;
data->vroot = NULL;
FUSE_UNLOCK();
vrele(vroot);
} else
FUSE_UNLOCK();
err = vflush(mp, 0, flags, td);
if (err) {
debug_printf("vflush failed");
return err;
}
if (fdata_get_dead(data)) {
goto alreadydead;
}
fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_DESTROY, mp, 0, td, NULL);
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
fdata_set_dead(data);
alreadydead:
FUSE_LOCK();
data->mp = NULL;
fdev = data->fdev;
fdata_trydestroy(data);
FUSE_UNLOCK();
MNT_ILOCK(mp);
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
MNT_IUNLOCK(mp);
dev_rel(fdev);
return 0;
}
static int
fuse_vfsop_root(struct mount *mp, int lkflags, struct vnode **vpp)
{
struct fuse_data *data = fuse_get_mpdata(mp);
int err = 0;
if (data->vroot != NULL) {
err = vget(data->vroot, lkflags, curthread);
if (err == 0)
*vpp = data->vroot;
} else {
err = fuse_vnode_get(mp, FUSE_ROOT_ID, NULL, vpp, NULL, VDIR);
if (err == 0) {
FUSE_LOCK();
MPASS(data->vroot == NULL || data->vroot == *vpp);
if (data->vroot == NULL) {
DEBUG("new root vnode\n");
data->vroot = *vpp;
FUSE_UNLOCK();
vref(*vpp);
} else if (data->vroot != *vpp) {
DEBUG("root vnode race\n");
FUSE_UNLOCK();
VOP_UNLOCK(*vpp, 0);
vrele(*vpp);
vrecycle(*vpp);
*vpp = data->vroot;
} else
FUSE_UNLOCK();
}
}
return err;
}
static int
fuse_vfsop_statfs(struct mount *mp, struct statfs *sbp)
{
struct fuse_dispatcher fdi;
int err = 0;
struct fuse_statfs_out *fsfo;
struct fuse_data *data;
DEBUG2G("mp %p: %s\n", mp, mp->mnt_stat.f_mntfromname);
data = fuse_get_mpdata(mp);
if (!(data->dataflags & FSESS_INITED))
goto fake;
fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_STATFS, mp, FUSE_ROOT_ID, NULL, NULL);
err = fdisp_wait_answ(&fdi);
if (err) {
fdisp_destroy(&fdi);
if (err == ENOTCONN) {
/*
* We want to seem a legitimate fs even if the daemon
* is stiff dead... (so that, eg., we can still do path
* based unmounting after the daemon dies).
*/
goto fake;
}
return err;
}
fsfo = fdi.answ;
sbp->f_blocks = fsfo->st.blocks;
sbp->f_bfree = fsfo->st.bfree;
sbp->f_bavail = fsfo->st.bavail;
sbp->f_files = fsfo->st.files;
sbp->f_ffree = fsfo->st.ffree; /* cast from uint64_t to int64_t */
sbp->f_namemax = fsfo->st.namelen;
sbp->f_bsize = fsfo->st.frsize; /* cast from uint32_t to uint64_t */
DEBUG("fuse_statfs_out -- blocks: %llu, bfree: %llu, bavail: %llu, "
"fil es: %llu, ffree: %llu, bsize: %i, namelen: %i\n",
(unsigned long long)fsfo->st.blocks,
(unsigned long long)fsfo->st.bfree,
(unsigned long long)fsfo->st.bavail,
(unsigned long long)fsfo->st.files,
(unsigned long long)fsfo->st.ffree, fsfo->st.bsize,
fsfo->st.namelen);
fdisp_destroy(&fdi);
return 0;
fake:
sbp->f_blocks = 0;
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 0;
sbp->f_ffree = 0;
sbp->f_namemax = 0;
sbp->f_bsize = FUSE_DEFAULT_BLOCKSIZE;
return 0;
}

2037
sys/fs/fuse/fuse_vnops.c Normal file
View file

File diff suppressed because it is too large Load diff

1
sys/modules/Makefile
View file

@ -111,6 +111,7 @@ SUBDIR= \
${_filemon} \
firewire \
firmware \
fuse \
${_fxp} \
gem \
geom \

10
sys/modules/fuse/Makefile Normal file
View file

@ -0,0 +1,10 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../../fs/fuse
KMOD= fuse
SRCS= vnode_if.h \
fuse_node.c fuse_io.c fuse_device.c fuse_ipc.c fuse_file.c \
fuse_vfsops.c fuse_vnops.c fuse_internal.c fuse_main.c
.include <bsd.kmod.mk>