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add flush callback. closes #16

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This commit is contained in:
Antonio SJ Musumeci 2014-06-13 11:04:26 -04:00
parent dd666079b6
commit 716453596a
3 changed files with 96 additions and 1 deletions
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61
src/flush.cpp Normal file
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@ -0,0 +1,61 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <fuse.h>
#include <unistd.h>
#include <errno.h>
#include "ugid.hpp"
#include "fileinfo.hpp"
static
int
_flush(const int fd)
{
int rv;
rv = dup(fd);
if(rv == -1)
errno = EIO;
else
rv = close(rv);
return ((rv == -1) ? -errno : 0);
}
namespace mergerfs
{
namespace flush
{
int
flush(const char *path,
struct fuse_file_info *fi)
{
const ugid::SetResetGuard ugid;
return _flush(((FileInfo*)fi->fh)->fd);
}
}
}

33
src/flush.hpp Normal file
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@ -0,0 +1,33 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
namespace mergerfs
{
namespace flush
{
int
flush(const char *path,
struct fuse_file_info *fi);
}
}

3
src/mergerfs.cpp
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@ -40,6 +40,7 @@
#include "create.hpp"
#include "fallocate.hpp"
#include "fgetattr.hpp"
#include "flush.hpp"
#include "fsync.hpp"
#include "ftruncate.hpp"
#include "getattr.hpp"
@ -85,7 +86,7 @@ get_fuse_operations()
ops.fallocate = mergerfs::fallocate::fallocate;
ops.fgetattr = mergerfs::fgetattr::fgetattr;
ops.flock = NULL;
ops.flush = NULL; /* called on close() of fd */
ops.flush = mergerfs::flush::flush;
ops.fsync = mergerfs::fsync::fsync;
ops.fsyncdir = NULL;
ops.ftruncate = mergerfs::ftruncate::ftruncate;