1e93fc5eeb
on timing of the operations and not real lookup, bringing too many false positives. Remove the whole mechanism. If it needs to be implemented, next time it should really be done in the proper way. - Fix VOP_GETATTR() in order to cope with userland bugs that would change the type of file and not panic. Instead it gets the entry as if it is not existing. Reported and tested by: flo MFC after: 2 months X-MFC: 241519, 242536,242616
369 lines
10 KiB
C
369 lines
10 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_INTERNAL_H_
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#define _FUSE_INTERNAL_H_
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include "fuse_ipc.h"
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#include "fuse_node.h"
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static __inline int
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vfs_isrdonly(struct mount *mp)
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{
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return ((mp->mnt_flag & MNT_RDONLY) != 0 ? 1 : 0);
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}
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static __inline struct mount *
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vnode_mount(struct vnode *vp)
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{
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return (vp->v_mount);
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}
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static __inline int
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vnode_mountedhere(struct vnode *vp)
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{
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return (vp->v_mountedhere != NULL ? 1 : 0);
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}
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static __inline enum vtype
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vnode_vtype(struct vnode *vp)
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{
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return (vp->v_type);
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}
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static __inline int
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vnode_isvroot(struct vnode *vp)
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{
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return ((vp->v_vflag & VV_ROOT) != 0 ? 1 : 0);
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}
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static __inline int
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vnode_isreg(struct vnode *vp)
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{
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return (vp->v_type == VREG ? 1 : 0);
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}
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static __inline int
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vnode_isdir(struct vnode *vp)
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{
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return (vp->v_type == VDIR ? 1 : 0);
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}
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static __inline int
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vnode_islnk(struct vnode *vp)
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{
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return (vp->v_type == VLNK ? 1 : 0);
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}
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static __inline ssize_t
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uio_resid(struct uio *uio)
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{
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return (uio->uio_resid);
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}
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static __inline off_t
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uio_offset(struct uio *uio)
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{
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return (uio->uio_offset);
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}
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static __inline void
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uio_setoffset(struct uio *uio, off_t offset)
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{
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uio->uio_offset = offset;
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}
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static __inline void
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uio_setresid(struct uio *uio, ssize_t resid)
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{
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uio->uio_resid = resid;
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}
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/* miscellaneous */
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static __inline__
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int
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fuse_isdeadfs(struct vnode *vp)
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{
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struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
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return (data->dataflags & FSESS_DEAD);
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}
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static __inline__
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int
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fuse_iosize(struct vnode *vp)
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{
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return vp->v_mount->mnt_stat.f_iosize;
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}
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/* access */
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#define FVP_ACCESS_NOOP 0x01
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#define FACCESS_VA_VALID 0x01
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#define FACCESS_DO_ACCESS 0x02
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#define FACCESS_STICKY 0x04
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#define FACCESS_CHOWN 0x08
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#define FACCESS_NOCHECKSPY 0x10
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#define FACCESS_SETGID 0x12
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#define FACCESS_XQUERIES FACCESS_STICKY | FACCESS_CHOWN | FACCESS_SETGID
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struct fuse_access_param {
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uid_t xuid;
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gid_t xgid;
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uint32_t facc_flags;
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};
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static __inline int
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fuse_match_cred(struct ucred *basecred, struct ucred *usercred)
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{
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if (basecred->cr_uid == usercred->cr_uid &&
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basecred->cr_uid == usercred->cr_ruid &&
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basecred->cr_uid == usercred->cr_svuid &&
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basecred->cr_groups[0] == usercred->cr_groups[0] &&
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basecred->cr_groups[0] == usercred->cr_rgid &&
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basecred->cr_groups[0] == usercred->cr_svgid)
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return 0;
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return EPERM;
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}
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int
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fuse_internal_access(struct vnode *vp,
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mode_t mode,
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struct fuse_access_param *facp,
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struct thread *td,
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struct ucred *cred);
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/* attributes */
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static __inline
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void
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fuse_internal_attr_fat2vat(struct mount *mp,
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struct fuse_attr *fat,
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struct vattr *vap)
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{
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DEBUGX(FUSE_DEBUG_INTERNAL,
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"node #%ju, mode 0%o\n", (uintmax_t)fat->ino, fat->mode);
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vattr_null(vap);
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vap->va_fsid = mp->mnt_stat.f_fsid.val[0];
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vap->va_fileid = fat->ino; /* XXX cast from 64 bits to 32 */
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vap->va_mode = fat->mode & ~S_IFMT;
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vap->va_nlink = fat->nlink;
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vap->va_uid = fat->uid;
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vap->va_gid = fat->gid;
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vap->va_rdev = fat->rdev;
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vap->va_size = fat->size;
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vap->va_atime.tv_sec = fat->atime; /* XXX on some platforms cast from 64 bits to 32 */
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vap->va_atime.tv_nsec = fat->atimensec;
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vap->va_mtime.tv_sec = fat->mtime;
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vap->va_mtime.tv_nsec = fat->mtimensec;
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vap->va_ctime.tv_sec = fat->ctime;
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vap->va_ctime.tv_nsec = fat->ctimensec;
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vap->va_blocksize = PAGE_SIZE;
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vap->va_type = IFTOVT(fat->mode);
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#if (S_BLKSIZE == 512)
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/* Optimize this case */
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vap->va_bytes = fat->blocks << 9;
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#else
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vap->va_bytes = fat->blocks * S_BLKSIZE;
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#endif
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vap->va_flags = 0;
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}
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#define cache_attrs(vp, fuse_out) \
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fuse_internal_attr_fat2vat(vnode_mount(vp), &(fuse_out)->attr, \
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VTOVA(vp));
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/* fsync */
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int
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fuse_internal_fsync(struct vnode *vp,
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struct thread *td,
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struct ucred *cred,
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struct fuse_filehandle *fufh);
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int
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fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio);
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/* readdir */
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struct pseudo_dirent {
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uint32_t d_namlen;
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};
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int
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fuse_internal_readdir(struct vnode *vp,
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struct uio *uio,
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struct fuse_filehandle *fufh,
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struct fuse_iov *cookediov);
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int
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fuse_internal_readdir_processdata(struct uio *uio,
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size_t reqsize,
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void *buf,
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size_t bufsize,
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void *param);
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/* remove */
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int
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fuse_internal_remove(struct vnode *dvp,
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struct vnode *vp,
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struct componentname *cnp,
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enum fuse_opcode op);
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/* rename */
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int
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fuse_internal_rename(struct vnode *fdvp,
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struct componentname *fcnp,
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struct vnode *tdvp,
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struct componentname *tcnp);
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/* revoke */
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void
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fuse_internal_vnode_disappear(struct vnode *vp);
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/* strategy */
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/* entity creation */
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static __inline
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int
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fuse_internal_checkentry(struct fuse_entry_out *feo, enum vtype vtyp)
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{
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DEBUGX(FUSE_DEBUG_INTERNAL,
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"feo=%p, vtype=%d\n", feo, vtyp);
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if (vtyp != IFTOVT(feo->attr.mode)) {
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DEBUGX(FUSE_DEBUG_INTERNAL,
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"EINVAL -- %x != %x\n", vtyp, IFTOVT(feo->attr.mode));
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return EINVAL;
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}
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if (feo->nodeid == FUSE_NULL_ID) {
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DEBUGX(FUSE_DEBUG_INTERNAL,
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"EINVAL -- feo->nodeid is NULL\n");
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return EINVAL;
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}
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if (feo->nodeid == FUSE_ROOT_ID) {
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DEBUGX(FUSE_DEBUG_INTERNAL,
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"EINVAL -- feo->nodeid is FUSE_ROOT_ID\n");
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return EINVAL;
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}
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return 0;
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}
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int
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fuse_internal_newentry(struct vnode *dvp,
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struct vnode **vpp,
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struct componentname *cnp,
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enum fuse_opcode op,
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void *buf,
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size_t bufsize,
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enum vtype vtyp);
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void
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fuse_internal_newentry_makerequest(struct mount *mp,
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uint64_t dnid,
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struct componentname *cnp,
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enum fuse_opcode op,
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void *buf,
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size_t bufsize,
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struct fuse_dispatcher *fdip);
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int
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fuse_internal_newentry_core(struct vnode *dvp,
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struct vnode **vpp,
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struct componentname *cnp,
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enum vtype vtyp,
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struct fuse_dispatcher *fdip);
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/* entity destruction */
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int
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fuse_internal_forget_callback(struct fuse_ticket *tick, struct uio *uio);
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void
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fuse_internal_forget_send(struct mount *mp,
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struct thread *td,
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struct ucred *cred,
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uint64_t nodeid,
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uint64_t nlookup);
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/* fuse start/stop */
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int fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio);
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void fuse_internal_send_init(struct fuse_data *data, struct thread *td);
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#endif /* _FUSE_INTERNAL_H_ */
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