326 lines
9.4 KiB
C
326 lines
9.4 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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* Copyright (c) 2019 The FreeBSD Foundation
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*
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* Portions of this software were developed by BFF Storage Systems, LLC under
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* sponsorship from the FreeBSD Foundation.
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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/counter.h>
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#include <sys/limits.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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extern counter_u64_t fuse_lookup_cache_hits;
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extern counter_u64_t fuse_lookup_cache_misses;
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static inline bool
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vfs_isrdonly(struct mount *mp)
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{
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return ((mp->mnt_flag & MNT_RDONLY) != 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 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 bool
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vnode_isvroot(struct vnode *vp)
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{
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return ((vp->v_vflag & VV_ROOT) != 0);
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}
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static inline bool
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vnode_isreg(struct vnode *vp)
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{
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return (vp->v_type == VREG);
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}
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static inline bool
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vnode_isdir(struct vnode *vp)
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{
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return (vp->v_type == VDIR);
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}
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static inline bool
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vnode_islnk(struct vnode *vp)
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{
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return (vp->v_type == VLNK);
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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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/* miscellaneous */
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static inline bool
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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 uint64_t
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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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/*
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* Make a cacheable timeout in bintime format value based on a fuse_attr_out
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* response
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*/
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static inline void
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fuse_validity_2_bintime(uint64_t attr_valid, uint32_t attr_valid_nsec,
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struct bintime *timeout)
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{
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struct timespec now, duration, timeout_ts;
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getnanouptime(&now);
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/* "+ 2" is the bound of attr_valid_nsec + now.tv_nsec */
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/* Why oh why isn't there a TIME_MAX defined? */
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if (attr_valid >= INT_MAX || attr_valid + now.tv_sec + 2 >= INT_MAX) {
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timeout->sec = INT_MAX;
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} else {
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duration.tv_sec = attr_valid;
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duration.tv_nsec = attr_valid_nsec;
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timespecadd(&duration, &now, &timeout_ts);
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timespec2bintime(&timeout_ts, timeout);
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}
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}
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/*
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* Make a cacheable timeout value in timespec format based on the fuse_entry_out
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* response
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*/
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static inline void
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fuse_validity_2_timespec(const struct fuse_entry_out *feo,
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struct timespec *timeout)
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{
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struct timespec duration, now;
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getnanouptime(&now);
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/* "+ 2" is the bound of entry_valid_nsec + now.tv_nsec */
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if (feo->entry_valid >= INT_MAX ||
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feo->entry_valid + now.tv_sec + 2 >= INT_MAX) {
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timeout->tv_sec = INT_MAX;
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} else {
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duration.tv_sec = feo->entry_valid;
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duration.tv_nsec = feo->entry_valid_nsec;
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timespecadd(&duration, &now, timeout);
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}
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}
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/* VFS ops */
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int
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fuse_internal_get_cached_vnode(struct mount*, ino_t, int, struct vnode**);
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/* access */
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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 fuse_internal_access(struct vnode *vp, accmode_t mode,
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struct thread *td, struct ucred *cred);
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/* attributes */
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void fuse_internal_cache_attrs(struct vnode *vp, struct fuse_attr *attr,
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uint64_t attr_valid, uint32_t attr_valid_nsec, struct vattr *vap);
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/* fsync */
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int fuse_internal_fsync(struct vnode *vp, struct thread *td, int waitfor,
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bool datasync);
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int fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio);
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/* getattr */
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int fuse_internal_do_getattr(struct vnode *vp, struct vattr *vap,
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struct ucred *cred, struct thread *td);
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int fuse_internal_getattr(struct vnode *vp, struct vattr *vap,
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struct ucred *cred, struct thread *td);
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/* asynchronous invalidation */
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int fuse_internal_invalidate_entry(struct mount *mp, struct uio *uio);
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int fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio);
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/* mknod */
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int fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp,
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struct componentname *cnp, struct vattr *vap);
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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 fuse_internal_readdir(struct vnode *vp, struct uio *uio, off_t startoff,
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struct fuse_filehandle *fufh, struct fuse_iov *cookediov, int *ncookies,
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u_long *cookies);
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int fuse_internal_readdir_processdata(struct uio *uio, off_t startoff,
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int *fnd_start, size_t reqsize, void *buf, size_t bufsize,
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struct fuse_iov *cookediov, int *ncookies, u_long **cookiesp);
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/* remove */
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int fuse_internal_remove(struct vnode *dvp, struct vnode *vp,
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struct componentname *cnp, enum fuse_opcode op);
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/* rename */
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int fuse_internal_rename(struct vnode *fdvp, struct componentname *fcnp,
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struct vnode *tdvp, struct componentname *tcnp);
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/* revoke */
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void fuse_internal_vnode_disappear(struct vnode *vp);
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/* setattr */
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int fuse_internal_setattr(struct vnode *vp, struct vattr *va,
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struct thread *td, struct ucred *cred);
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/* strategy */
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/* entity creation */
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static inline int
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fuse_internal_checkentry(struct fuse_entry_out *feo, enum vtype vtyp)
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{
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if (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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return (EINVAL);
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}
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if (feo->nodeid == FUSE_ROOT_ID) {
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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 fuse_internal_newentry(struct vnode *dvp, struct vnode **vpp,
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struct componentname *cnp, enum fuse_opcode op, void *buf, size_t bufsize,
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enum vtype vtyp);
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void fuse_internal_newentry_makerequest(struct mount *mp, uint64_t dnid,
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struct componentname *cnp, enum fuse_opcode op, void *buf, size_t bufsize,
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struct fuse_dispatcher *fdip);
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int fuse_internal_newentry_core(struct vnode *dvp, struct vnode **vpp,
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struct componentname *cnp, enum vtype vtyp, struct fuse_dispatcher *fdip);
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/* entity destruction */
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int fuse_internal_forget_callback(struct fuse_ticket *tick, struct uio *uio);
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void fuse_internal_forget_send(struct mount *mp, struct thread *td,
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struct ucred *cred, uint64_t nodeid, 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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/* module load/unload */
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void fuse_internal_init(void);
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void fuse_internal_destroy(void);
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#endif /* _FUSE_INTERNAL_H_ */
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