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96 lines
2.5 KiB
96 lines
2.5 KiB
/*
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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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#if WRITE_BUF
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#include <fuse.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string>
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#include <vector>
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#include "config.hpp"
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#include "fileinfo.hpp"
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#include "fs_movefile.hpp"
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#include "policy.hpp"
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#include "rwlock.hpp"
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#include "ugid.hpp"
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#include "write.hpp"
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using std::string;
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using std::vector;
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using namespace mergerfs;
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static
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int
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_write_buf(const int fd,
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fuse_bufvec &src,
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const off_t offset)
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{
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size_t size = fuse_buf_size(&src);
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fuse_bufvec dst = FUSE_BUFVEC_INIT(size);
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const fuse_buf_copy_flags cpflags =
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(fuse_buf_copy_flags)(FUSE_BUF_SPLICE_MOVE|FUSE_BUF_SPLICE_NONBLOCK);
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dst.buf->flags = (fuse_buf_flags)(FUSE_BUF_IS_FD|FUSE_BUF_FD_SEEK);
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dst.buf->fd = fd;
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dst.buf->pos = offset;
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return fuse_buf_copy(&dst,&src,cpflags);
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}
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namespace mergerfs
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{
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namespace fuse
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{
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int
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write_buf(const char *fusepath,
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fuse_bufvec *src,
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off_t offset,
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fuse_file_info *ffi)
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{
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int rv;
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FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
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rv = _write_buf(fi->fd,*src,offset);
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if(rv == -ENOSPC)
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{
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const fuse_context *fc = fuse_get_context();
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const Config &config = Config::get(fc);
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if(config.moveonenospc)
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{
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size_t extra;
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const ugid::Set ugid(0,0);
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const rwlock::ReadGuard readlock(&config.srcmountslock);
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extra = fuse_buf_size(src);
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rv = fs::movefile(config.srcmounts,fusepath,extra,fi->fd);
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if(rv == -1)
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return -ENOSPC;
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rv = _write_buf(fi->fd,*src,offset);
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}
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}
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return rv;
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}
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}
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}
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#endif
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