mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-04-21 12:31:43 +00:00
Antonio SJ Musumeci
c8fa51c81a
creates a 64bit inode value from the underlying device value + original inode final_ino = orig_ino | (dev << 32) not perfect but given few filesystems use 64bit inodes nor is st_dev more than 16bit usually it should be fine
109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
/*
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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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#define _BSD_SOURCE
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#include <fuse.h>
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#include <string>
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#include <set>
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#include <vector>
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#include "config.hpp"
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#include "errno.hpp"
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#include "fs_base_closedir.hpp"
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#include "fs_base_opendir.hpp"
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#include "fs_base_readdir.hpp"
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#include "fs_base_stat.hpp"
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#include "fs_inode.hpp"
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#include "fs_path.hpp"
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#include "readdir.hpp"
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#include "rwlock.hpp"
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#include "strset.hpp"
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#include "ugid.hpp"
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using std::string;
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using std::vector;
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using std::pair;
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#define NO_OFFSET 0
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static
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int
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_readdir(const vector<string> &srcmounts,
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const char *dirname,
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void *buf,
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const fuse_fill_dir_t filler)
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{
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string basepath;
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struct stat st = {0};
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StrSet names;
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st.st_ino = fs::inode::MAGIC;
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for(size_t i = 0, ei = srcmounts.size(); i != ei; i++)
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{
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DIR *dh;
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fs::path::make(&srcmounts[i],dirname,basepath);
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dh = fs::opendir(basepath);
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if(!dh)
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continue;
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for(struct dirent *de = fs::readdir(dh); de != NULL; de = fs::readdir(dh))
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{
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int rv;
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rv = names.put(de->d_name);
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if(rv == 0)
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continue;
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st.st_mode = DTTOIF(de->d_type);
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rv = filler(buf,de->d_name,&st,NO_OFFSET);
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if(rv)
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return -ENOMEM;
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}
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fs::closedir(dh);
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}
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return 0;
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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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readdir(const char *fusepath,
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void *buf,
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fuse_fill_dir_t filler,
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off_t offset,
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fuse_file_info *fi)
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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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const ugid::Set ugid(fc->uid,fc->gid);
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const rwlock::ReadGuard readlock(&config.srcmountslock);
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return _readdir(config.srcmounts,
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fusepath,
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buf,
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filler);
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}
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}
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}
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