e6e2445622
When "cp" of a file with read-only (mode 0444) to a fuse mounted file system was attempted it would fail with EACCES. This was because fuse would attempt to open the file WRONLY and the open would fail. This patch changes the fuse_vnop_open() to test for an extant read-write open and use that, if it is available. This makes the "cp" of a read-only file to the fuse mounted file system work ok. There are simpler ways to fix this than adding the fuse_filehandle_validrw() function, but this function is useful for future patches related to exporting a fuse filesystem via NFS. MFC after: 2 weeks
155 lines
5.2 KiB
C
155 lines
5.2 KiB
C
/*
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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_FILE_H_
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#define _FUSE_FILE_H_
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/vnode.h>
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typedef enum fufh_type {
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FUFH_INVALID = -1,
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FUFH_RDONLY = 0,
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FUFH_WRONLY = 1,
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FUFH_RDWR = 2,
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FUFH_MAXTYPE = 3,
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} fufh_type_t;
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struct fuse_filehandle {
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uint64_t fh_id;
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fufh_type_t fh_type;
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};
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#define FUFH_IS_VALID(f) ((f)->fh_type != FUFH_INVALID)
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static __inline__
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fufh_type_t
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fuse_filehandle_xlate_from_mmap(int fflags)
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{
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if (fflags & (PROT_READ | PROT_WRITE)) {
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return FUFH_RDWR;
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} else if (fflags & (PROT_WRITE)) {
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return FUFH_WRONLY;
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} else if ((fflags & PROT_READ) || (fflags & PROT_EXEC)) {
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return FUFH_RDONLY;
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} else {
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return FUFH_INVALID;
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}
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}
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static __inline__
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fufh_type_t
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fuse_filehandle_xlate_from_fflags(int fflags)
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{
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if ((fflags & FREAD) && (fflags & FWRITE)) {
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return FUFH_RDWR;
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} else if (fflags & (FWRITE)) {
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return FUFH_WRONLY;
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} else if (fflags & (FREAD)) {
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return FUFH_RDONLY;
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} else {
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panic("FUSE: What kind of a flag is this (%x)?", fflags);
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}
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}
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static __inline__
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int
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fuse_filehandle_xlate_to_oflags(fufh_type_t type)
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{
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int oflags = -1;
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switch (type) {
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case FUFH_RDONLY:
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oflags = O_RDONLY;
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break;
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case FUFH_WRONLY:
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oflags = O_WRONLY;
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break;
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case FUFH_RDWR:
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oflags = O_RDWR;
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break;
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default:
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break;
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}
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return oflags;
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}
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int fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type);
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fufh_type_t fuse_filehandle_validrw(struct vnode *vp, fufh_type_t fufh_type);
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int fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
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struct fuse_filehandle **fufhp);
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int fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
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struct fuse_filehandle **fufhp);
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void fuse_filehandle_init(struct vnode *vp, fufh_type_t fufh_type,
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struct fuse_filehandle **fufhp, uint64_t fh_id);
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int fuse_filehandle_open(struct vnode *vp, fufh_type_t fufh_type,
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struct fuse_filehandle **fufhp, struct thread *td,
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struct ucred *cred);
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int fuse_filehandle_close(struct vnode *vp, fufh_type_t fufh_type,
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struct thread *td, struct ucred *cred);
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#endif /* _FUSE_FILE_H_ */
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