/* Copyright (c) 2016, Antonio SJ Musumeci Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "state.hpp" #include "toml.hpp" #include "fs_readahead.hpp" #include "fs_wait_for_mount.hpp" #include "syslog.hpp" #include "fs_path.hpp" #include "fs_umount2.hpp" #include "mergerfs.hpp" #include "option_parser.hpp" #include "procfs_get_name.hpp" #include "resources.hpp" #include "strvec.hpp" #include "gidcache.hpp" #include "fuse_access.hpp" #include "fuse_bmap.hpp" #include "fuse_chmod.hpp" #include "fuse_chown.hpp" #include "fuse_copy_file_range.hpp" #include "fuse_create.hpp" #include "fuse_destroy.hpp" #include "fuse_fallocate.hpp" #include "fuse_fchmod.hpp" #include "fuse_fchown.hpp" #include "fuse_fgetattr.hpp" #include "fuse_flock.hpp" #include "fuse_flush.hpp" #include "fuse_free_hide.hpp" #include "fuse_fsync.hpp" #include "fuse_fsyncdir.hpp" #include "fuse_ftruncate.hpp" #include "fuse_futimens.hpp" #include "fuse_getattr.hpp" #include "fuse_getxattr.hpp" #include "fuse_init.hpp" #include "fuse_ioctl.hpp" #include "fuse_link.hpp" #include "fuse_listxattr.hpp" #include "fuse_lock.hpp" #include "fuse_mkdir.hpp" #include "fuse_mknod.hpp" #include "fuse_open.hpp" #include "fuse_opendir.hpp" #include "fuse_poll.hpp" #include "fuse_prepare_hide.hpp" #include "fuse_read.hpp" #include "fuse_readdir.hpp" #include "fuse_readdir_plus.hpp" #include "fuse_readlink.hpp" #include "fuse_release.hpp" #include "fuse_releasedir.hpp" #include "fuse_removemapping.hpp" #include "fuse_removexattr.hpp" #include "fuse_rename.hpp" #include "fuse_rmdir.hpp" #include "fuse_setupmapping.hpp" #include "fuse_setxattr.hpp" #include "fuse_statfs.hpp" #include "fuse_symlink.hpp" #include "fuse_syncfs.hpp" #include "fuse_tmpfile.hpp" #include "fuse_truncate.hpp" #include "fuse_unlink.hpp" #include "fuse_utimens.hpp" #include "fuse_write.hpp" #include "fuse.h" #include #include #include #include namespace l { static void get_fuse_operations(struct fuse_operations &ops_, const bool nullrw_) { ops_.access = FUSE::access; ops_.bmap = FUSE::bmap; ops_.chmod = FUSE::chmod; ops_.chown = FUSE::chown; ops_.copy_file_range = FUSE::copy_file_range; ops_.create = FUSE::create; ops_.destroy = FUSE::destroy; ops_.fallocate = FUSE::fallocate; ops_.fchmod = FUSE::fchmod; ops_.fchown = FUSE::fchown; ops_.fgetattr = FUSE::fgetattr; ops_.flock = FUSE::flock; ops_.flush = FUSE::flush; ops_.free_hide = FUSE::free_hide; ops_.fsync = FUSE::fsync; ops_.fsyncdir = FUSE::fsyncdir; ops_.ftruncate = FUSE::ftruncate; ops_.futimens = FUSE::futimens; ops_.getattr = FUSE::getattr; ops_.getxattr = FUSE::getxattr; ops_.init = FUSE::init; ops_.ioctl = FUSE::ioctl; ops_.link = FUSE::link; ops_.listxattr = FUSE::listxattr; ops_.lock = FUSE::lock; ops_.mkdir = FUSE::mkdir; ops_.mknod = FUSE::mknod; ops_.open = FUSE::open; ops_.opendir = FUSE::opendir; ops_.poll = FUSE::poll;; ops_.prepare_hide = FUSE::prepare_hide; ops_.read = (nullrw_ ? FUSE::read_null : FUSE::read); ops_.readdir = FUSE::readdir; ops_.readdir_plus = FUSE::readdir_plus; ops_.readlink = FUSE::readlink; ops_.release = FUSE::release; ops_.releasedir = FUSE::releasedir; ops_.removemapping = FUSE::removemapping; ops_.removexattr = FUSE::removexattr; ops_.rename = FUSE::rename; ops_.rmdir = FUSE::rmdir; ops_.setupmapping = FUSE::setupmapping; ops_.setxattr = FUSE::setxattr; ops_.statfs = FUSE::statfs; ops_.symlink = FUSE::symlink; ops_.syncfs = FUSE::syncfs; ops_.tmpfile = FUSE::tmpfile; ops_.truncate = FUSE::truncate; ops_.unlink = FUSE::unlink; ops_.utimens = FUSE::utimens; ops_.write = (nullrw_ ? FUSE::write_null : FUSE::write); return; } static void setup_resources(const int scheduling_priority_) { std::srand(time(NULL)); resources::reset_umask(); resources::maxout_rlimit_nofile(); resources::maxout_rlimit_fsize(); resources::setpriority(scheduling_priority_); } static void wait_for_mount(const Config::Read &cfg_) { fs::PathVector paths; std::chrono::milliseconds timeout; paths = cfg_->branches->to_paths(); syslog_info("Waiting %u seconds for branches to mount", (uint64_t)cfg_->branches_mount_timeout); timeout = std::chrono::milliseconds(cfg_->branches_mount_timeout * 1000); fs::wait_for_mount((std::string)cfg_->mountpoint, paths, timeout); } static void lazy_umount(const std::string target_) { int rv; rv = fs::umount_lazy(target_); switch(rv) { case 0: syslog_notice("%s has been successfully lazily unmounted", target_.c_str()); break; case -EINVAL: syslog_notice("%s was not a mount point needing to be unmounted", target_.c_str()); break; default: syslog_error("Error unmounting %s: %d - %s", target_.c_str(), -rv, strerror(-rv)); break; } } static void usr1_signal_handler(int signal_) { syslog_info("Received SIGUSR1 - invalidating all nodes"); fuse_invalidate_all_nodes(); } static void usr2_signal_handler(int signal_) { syslog_info("Received SIGUSR2 - triggering thorough gc"); fuse_gc(); GIDCache::invalidate_all_caches(); } static void setup_signal_handlers() { std::signal(SIGUSR1,l::usr1_signal_handler); std::signal(SIGUSR2,l::usr2_signal_handler); } static void warn_if_not_root() { uid_t uid; uid = geteuid(); if(uid == 0) return; char const *s = "mergerfs is not running as root and may not work correctly\n"; fprintf(stderr,"warning: %s",s); syslog_warning(s); } int main(const int argc_, char **argv_) { int rv; Config::Read cfg; Config::ErrVec errs; fuse_args args; fuse_operations ops; syslog_open(); l::warn_if_not_root(); memset(&ops,0,sizeof(fuse_operations)); args.argc = argc_; args.argv = argv_; args.allocated = 0; options::parse(&args,&errs); if(errs.size()) { std::cerr << errs << std::endl; return 1; } if(cfg->branches_mount_timeout > 0) l::wait_for_mount(cfg); l::setup_resources(cfg->scheduling_priority); l::setup_signal_handlers(); l::get_fuse_operations(ops,cfg->nullrw); if(cfg->lazy_umount_mountpoint) l::lazy_umount(cfg->mountpoint); procfs::init(); rv = fuse_main(args.argc, args.argv, &ops); syslog_info("exiting main loop with return code %d",rv); return rv; } } int main(int argc_, char **argv_) { State state; auto data = toml::parse("config.toml"); fuse_file_info_t ffi; Branches2 branches(data["branches"]); state.create(branches, "", O_RDWR, &ffi); std::cout << data["branches"] << '\n'; for(auto &branch_tier : branches) { for(auto &branch : branch_tier) { fmt::print("{}\n",branch.enabled); } } pause(); return 0; return l::main(argc_,argv_); }