mirror of https://github.com/trapexit/mergerfs.git
83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
/*
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Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "errno.hpp"
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#include "fileinfo.hpp"
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#include "fs_pread.hpp"
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#include "fuse.h"
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#include <stdlib.h>
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#include <string.h>
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namespace l
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{
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static
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int
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read_direct_io(const int fd_,
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char *buf_,
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const size_t size_,
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const off_t offset_)
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{
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int rv;
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rv = fs::pread(fd_,buf_,size_,offset_);
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return rv;
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}
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static
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int
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read_cached(const int fd_,
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char *buf_,
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const size_t size_,
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const off_t offset_)
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{
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int rv;
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rv = fs::pread(fd_,buf_,size_,offset_);
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return rv;
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}
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}
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namespace FUSE
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{
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int
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read(const fuse_file_info_t *ffi_,
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char *buf_,
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size_t size_,
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off_t offset_)
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{
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FileInfo *fi = reinterpret_cast<FileInfo*>(ffi_->fh);
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if(fi->direct_io)
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return l::read_direct_io(fi->fd,buf_,size_,offset_);
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return l::read_cached(fi->fd,buf_,size_,offset_);
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}
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int
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read_null(const fuse_file_info_t *ffi_,
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char *buf_,
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size_t size_,
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off_t offset_)
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{
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return size_;
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}
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}
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