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106 lines
2.9 KiB
106 lines
2.9 KiB
/*
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The MIT License (MIT)
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Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include <fuse.h>
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#include <string>
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#include <vector>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "ugid.hpp"
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#include "fs.hpp"
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#include "config.hpp"
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#include "rwlock.hpp"
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using std::string;
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using std::vector;
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static
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int
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_mknod(const fs::SearchFunc searchFunc,
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const fs::SearchFunc createPathFunc,
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const vector<string> &srcmounts,
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const string &fusepath,
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const mode_t mode,
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const dev_t dev)
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{
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int rv;
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string path;
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string dirname;
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fs::Path createpath;
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fs::Path existingpath;
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if(fs::path_exists(srcmounts,fusepath))
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return -EEXIST;
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dirname = fs::dirname(fusepath);
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rv = searchFunc(srcmounts,dirname,existingpath);
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if(rv == -1)
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return -errno;
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rv = createPathFunc(srcmounts,dirname,createpath);
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if(rv == -1)
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return -errno;
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if(existingpath.base != createpath.base)
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{
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const mergerfs::ugid::SetResetGuard ugid(0,0);
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fs::clonepath(existingpath.base,createpath.base,dirname);
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}
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path = fs::make_path(createpath.base,fusepath);
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rv = ::mknod(path.c_str(),mode,dev);
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return ((rv == -1) ? -errno : 0);
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}
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namespace mergerfs
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{
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namespace mknod
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{
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int
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mknod(const char *fusepath,
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mode_t mode,
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dev_t rdev)
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{
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const struct fuse_context *fc = fuse_get_context();
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const config::Config &config = config::get();
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const ugid::SetResetGuard ugid(fc->uid,fc->gid);
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const rwlock::ReadGuard readlock(&config.srcmountslock);
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return _mknod(*config.search,
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*config.create,
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config.srcmounts,
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fusepath,
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(mode & ~fc->umask),
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rdev);
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}
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}
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}
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