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110 lines
2.7 KiB
110 lines
2.7 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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#include "config.hpp"
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#include "errno.hpp"
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#include "fileinfo.hpp"
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#include "fs_movefile.hpp"
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#include "fuse_write.hpp"
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#include "fuse.h"
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#include <string>
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#include <vector>
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#include <stdlib.h>
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#include <unistd.h>
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using std::string;
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using std::vector;
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namespace l
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{
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static
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bool
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out_of_space(const int error_)
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{
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return ((error_ == ENOSPC) ||
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(error_ == EDQUOT));
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}
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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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static
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int
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move_and_write_buf(FileInfo *fi_,
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fuse_bufvec *src_,
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off_t offset_,
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int err_)
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{
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int rv;
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const Config &config = Config::ro();
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if(config.moveonenospc.enabled == false)
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return err_;
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rv = fs::movefile_as_root(config.moveonenospc.policy,
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config.branches,
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fi_->fusepath,
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&fi_->fd);
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if(rv == -1)
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return err_;
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return l::write_buf(fi_->fd,src_,offset_);
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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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write_buf(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 = l::write_buf(fi->fd,src_,offset_);
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if(l::out_of_space(-rv))
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rv = l::move_and_write_buf(fi,src_,offset_,rv);
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return rv;
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}
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int
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write_buf_null(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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return src_->buf[0].size;
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}
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}
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