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add {read,write}_buf functions. closes #15

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This commit is contained in:
Antonio SJ Musumeci 2014-06-10 17:00:22 -04:00
parent 0f8fe47016
commit dd666079b6
5 changed files with 309 additions and 2 deletions
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6
src/mergerfs.cpp
View File

@ -51,6 +51,7 @@
#include "mknod.hpp"
#include "open.hpp"
#include "read.hpp"
#include "read_buf.hpp"
#include "readdir.hpp"
#include "readlink.hpp"
#include "release.hpp"
@ -64,6 +65,7 @@
#include "unlink.hpp"
#include "utimens.hpp"
#include "write.hpp"
#include "write_buf.hpp"
static
struct fuse_operations
@ -101,7 +103,7 @@ get_fuse_operations()
ops.opendir = NULL;
ops.poll = NULL;
ops.read = mergerfs::read::read;
ops.read_buf = NULL;
ops.read_buf = mergerfs::read_buf::read_buf;
ops.readdir = mergerfs::readdir::readdir;
ops.readlink = mergerfs::readlink::readlink;
ops.release = mergerfs::release::release;
@ -117,7 +119,7 @@ get_fuse_operations()
ops.utime = NULL; /* deprecated; use utimens() */
ops.utimens = mergerfs::utimens::utimens;
ops.write = mergerfs::write::write;
ops.write_buf = NULL;
ops.write_buf = mergerfs::write_buf::write_buf;
return ops;
}

125
src/read_buf.cpp Normal file
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@ -0,0 +1,125 @@
/*
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 <stdlib.h>
#include <errno.h>
#include <string.h>
#include "config.hpp"
#include "ugid.hpp"
#include "fileinfo.hpp"
using std::string;
static
void *
memdup(const void *src,
const size_t len)
{
void *dst;
dst = malloc(len);
if(dst == NULL)
return NULL;
memcpy(dst, src, len);
return dst;
}
static
int
_read_buf_controlfile(const string readstr,
struct fuse_bufvec **bufp,
const size_t size)
{
struct fuse_bufvec *src;
src = (fuse_bufvec*)malloc(sizeof(struct fuse_bufvec));
if(src == NULL)
return -ENOMEM;
*src = FUSE_BUFVEC_INIT(std::min(size,readstr.size()));
src->buf->mem = memdup(readstr.data(),readstr.size());
if(src->buf->mem == NULL)
return -ENOMEM;
*bufp = src;
return 0;
}
static
int
_read_buf(const int fd,
struct fuse_bufvec **bufp,
const size_t size,
const off_t offset)
{
struct fuse_bufvec *src;
src = (fuse_bufvec*)malloc(sizeof(struct fuse_bufvec));
if(src == NULL)
return -ENOMEM;
*src = FUSE_BUFVEC_INIT(size);
src->buf->flags = (fuse_buf_flags)(FUSE_BUF_IS_FD|FUSE_BUF_FD_SEEK|FUSE_BUF_FD_RETRY);
src->buf->fd = fd;
src->buf->pos = offset;
*bufp = src;
return 0;
}
namespace mergerfs
{
namespace read_buf
{
int
read_buf(const char *fusepath,
struct fuse_bufvec **bufp,
size_t size,
off_t offset,
struct fuse_file_info *fi)
{
const ugid::SetResetGuard ugid;
const config::Config &config = config::get();
if(fusepath == config.controlfile)
return _read_buf_controlfile(config.readstr,
bufp,
size);
return _read_buf(((FileInfo*)fi->fh)->fd,
bufp,
size,
offset);
}
}
}

36
src/read_buf.hpp Normal file
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@ -0,0 +1,36 @@
/*
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 read_buf
{
int
read_buf(const char *fusepath,
struct fuse_bufvec **buf,
size_t size,
off_t offset,
struct fuse_file_info *fi);
}
}

109
src/write_buf.cpp Normal file
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@ -0,0 +1,109 @@
/*
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 <string>
#include <stdlib.h>
#include <fuse.h>
#include "config.hpp"
#include "ugid.hpp"
#include "fileinfo.hpp"
#include "write.hpp"
using std::string;
static
int
_write_buf_controlfile(const string controlfile,
struct fuse_bufvec *buf,
struct fuse_file_info *fi)
{
int rv;
size_t size;
struct fuse_bufvec dst;
size = fuse_buf_size(buf);
dst = FUSE_BUFVEC_INIT(size);
dst.buf->mem = malloc(size);
rv = fuse_buf_copy(&dst,buf,(fuse_buf_copy_flags)0);
if(rv < 0)
{
free(dst.buf->mem);
return rv;
}
rv = mergerfs::write::write(controlfile.c_str(),
(const char*)dst.buf->mem,
size,
0,
fi);
free(dst.buf->mem);
return rv;
}
static
int
_write_buf(const int fd,
struct fuse_bufvec *buf,
const off_t offset)
{
size_t size = fuse_buf_size(buf);
struct fuse_bufvec dest = FUSE_BUFVEC_INIT(size);
const fuse_buf_copy_flags cpflags =
(fuse_buf_copy_flags)(FUSE_BUF_SPLICE_MOVE|FUSE_BUF_SPLICE_NONBLOCK);
dest.buf->flags = (fuse_buf_flags)(FUSE_BUF_IS_FD|FUSE_BUF_FD_SEEK);
dest.buf->fd = fd;
dest.buf->pos = offset;
return fuse_buf_copy(&dest,buf,cpflags);
}
namespace mergerfs
{
namespace write_buf
{
int
write_buf(const char *fusepath,
struct fuse_bufvec *buf,
off_t offset,
struct fuse_file_info *fi)
{
const ugid::SetResetGuard ugid;
const config::Config &config = config::get();
if(fusepath == config.controlfile)
return _write_buf_controlfile(config.controlfile,
buf,
fi);
return _write_buf(((FileInfo*)fi->fh)->fd,
buf,
offset);
}
}
}

35
src/write_buf.hpp Normal file
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@ -0,0 +1,35 @@
/*
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 write_buf
{
int
write_buf(const char *fusepath,
struct fuse_bufvec *buf,
off_t offset,
struct fuse_file_info *fi);
}
}