freebsd-dev/sys/fs/fuse/fuse_node.h
Alan Somers 0269ae4c19 MFHead @348740
Sponsored by:	The FreeBSD Foundation
2019-06-06 16:20:50 +00:00

184 lines
5.9 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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/fnv_hash.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
/*
* Indicates that the file's size is dirty; the kernel has changed it but not
* yet send the change to the daemon. When this bit is set, the
* cache_attrs.va_size field does not time out
*/
#define FN_SIZECHANGE 0x00000100
#define FN_DIRECTIO 0x00000200
/* Indicates that parent_nid is valid */
#define FN_PARENT_NID 0x00000400
struct fuse_vnode_data {
/** self **/
uint64_t nid;
uint64_t generation;
/** parent **/
uint64_t parent_nid;
/** I/O **/
/* List of file handles for all of the vnode's open file descriptors */
LIST_HEAD(, fuse_filehandle) handles;
/** flags **/
uint32_t flag;
/** meta **/
/* The monotonic time after which the attr cache is invalid */
struct bintime attr_cache_timeout;
/*
* Monotonic time after which the entry is invalid. Used for lookups
* by nodeid instead of pathname.
*/
struct bintime entry_cache_timeout;
struct vattr cached_attrs;
uint64_t nlookup;
enum vtype vtype;
};
/*
* This overlays the fid structure (see mount.h). Mostly the same as the types
* used by UFS and ext2.
*/
struct fuse_fid {
uint16_t len; /* Length of structure. */
uint16_t pad; /* Force 32-bit alignment. */
uint32_t gen; /* Generation number. */
uint64_t nid; /* FUSE node id. */
};
#define VTOFUD(vp) \
((struct fuse_vnode_data *)((vp)->v_data))
#define VTOI(vp) (VTOFUD(vp)->nid)
static inline struct vattr*
VTOVA(struct vnode *vp)
{
struct bintime now;
getbinuptime(&now);
if (bintime_cmp(&(VTOFUD(vp)->attr_cache_timeout), &now, >))
return &(VTOFUD(vp)->cached_attrs);
else
return NULL;
}
static inline void
fuse_vnode_clear_attr_cache(struct vnode *vp)
{
bintime_clear(&VTOFUD(vp)->attr_cache_timeout);
}
static uint32_t inline
fuse_vnode_hash(uint64_t id)
{
return (fnv_32_buf(&id, sizeof(id), FNV1_32_INIT));
}
#define VTOILLU(vp) ((uint64_t)(VTOFUD(vp) ? VTOI(vp) : 0))
#define FUSE_NULL_ID 0
extern struct vop_vector fuse_fifoops;
extern struct vop_vector fuse_vnops;
int fuse_vnode_cmp(struct vnode *vp, void *nidp);
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);
VTOFUD(vp)->flag |= FN_PARENT_NID;
}
}
int fuse_vnode_size(struct vnode *vp, off_t *filesize, struct ucred *cred,
struct thread *td);
void fuse_vnode_destroy(struct vnode *vp);
int fuse_vnode_get(struct mount *mp, struct fuse_entry_out *feo,
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);
int fuse_vnode_savesize(struct vnode *vp, struct ucred *cred, pid_t pid);
int fuse_vnode_setsize(struct vnode *vp, off_t newsize);
#endif /* _FUSE_NODE_H_ */