1cedd6dfac
The FUSE protocol allows each open file descriptor to have a unique file handle. On FreeBSD, these file handles must all be stored in the vnode. The old method (also used by OSX and OpenBSD) is to store them all in a small array. But that limits the total number that can be stored. This commit replaces the array with a linked list (a technique also used by Illumos). There is not yet any change in functionality, but this is the first step to fixing several bugs. PR: 236329, 236340, 236381, 236560, 236844 Discussed with: cem Sponsored by: The FreeBSD Foundation
134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2007-2009 Google Inc. and Amit Singh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (C) 2005 Csaba Henk.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _FUSE_NODE_H_
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#define _FUSE_NODE_H_
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#include <sys/types.h>
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#include <sys/mutex.h>
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#include "fuse_file.h"
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#define FN_REVOKED 0x00000020
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#define FN_FLUSHINPROG 0x00000040
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#define FN_FLUSHWANT 0x00000080
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#define FN_SIZECHANGE 0x00000100
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#define FN_DIRECTIO 0x00000200
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struct fuse_vnode_data {
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/** self **/
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uint64_t nid;
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/** parent **/
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/* XXXIP very likely to be stale, it's not updated in rename() */
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uint64_t parent_nid;
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/** I/O **/
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/* List of file data for each of the vnode's open file descriptors */
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LIST_HEAD(, fuse_filehandle) handles;
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/** flags **/
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uint32_t flag;
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/** meta **/
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bool valid_attr_cache;
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struct vattr cached_attrs;
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off_t filesize;
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uint64_t nlookup;
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enum vtype vtype;
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};
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#define VTOFUD(vp) \
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((struct fuse_vnode_data *)((vp)->v_data))
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#define VTOI(vp) (VTOFUD(vp)->nid)
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#define VTOVA(vp) \
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(VTOFUD(vp)->valid_attr_cache ? \
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&(VTOFUD(vp)->cached_attrs) : NULL)
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#define VTOILLU(vp) ((uint64_t)(VTOFUD(vp) ? VTOI(vp) : 0))
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#define FUSE_NULL_ID 0
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extern struct vop_vector fuse_vnops;
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static inline void
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fuse_vnode_setparent(struct vnode *vp, struct vnode *dvp)
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{
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if (dvp != NULL && vp->v_type == VDIR) {
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MPASS(dvp->v_type == VDIR);
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VTOFUD(vp)->parent_nid = VTOI(dvp);
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}
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}
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void fuse_vnode_destroy(struct vnode *vp);
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int fuse_vnode_get(struct mount *mp, struct fuse_entry_out *feo,
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uint64_t nodeid, struct vnode *dvp, struct vnode **vpp,
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struct componentname *cnp, enum vtype vtyp);
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void fuse_vnode_open(struct vnode *vp, int32_t fuse_open_flags,
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struct thread *td);
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int fuse_vnode_refreshsize(struct vnode *vp, struct ucred *cred);
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int fuse_vnode_savesize(struct vnode *vp, struct ucred *cred);
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int fuse_vnode_setsize(struct vnode *vp, struct ucred *cred, off_t newsize);
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#endif /* _FUSE_NODE_H_ */
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