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152 lines
4.0 KiB
152 lines
4.0 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_acl.hpp"
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#include "fs_clonepath.hpp"
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#include "fs_open.hpp"
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#include "fs_path.hpp"
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#include "ugid.hpp"
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#include "func_open_create_utils.hpp"
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#include "fuse.h"
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#include <string>
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#include <vector>
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namespace l
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{
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static
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int
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create_core(const std::string &fullpath_,
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mode_t mode_,
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const mode_t umask_,
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const int flags_)
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{
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if(!fs::acl::dir_has_defaults(fullpath_))
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mode_ &= ~umask_;
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return fs::open(fullpath_,flags_,mode_);
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}
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static
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int
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create_core(const std::string &createpath_,
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const char *fusepath_,
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fuse_file_info_t *ffi_,
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const mode_t mode_,
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const mode_t umask_)
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{
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int rv;
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FileInfo *fi;
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std::string fullpath;
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fullpath = fs::path::make(createpath_,fusepath_);
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rv = l::create_core(fullpath,mode_,umask_,ffi_->flags);
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if(rv == -1)
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return -errno;
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fi = new FileInfo(rv,fusepath_,ffi_->direct_io);
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ffi_->fh = reinterpret_cast<uint64_t>(fi);
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return 0;
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}
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static
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int
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create(const Policy::Search &searchFunc_,
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const Policy::Create &createFunc_,
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const Branches &branches_,
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const char *fusepath_,
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fuse_file_info_t *ffi_,
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const mode_t mode_,
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const mode_t umask_)
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{
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int rv;
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std::string fullpath;
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std::string fusedirpath;
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StrVec createpaths;
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StrVec existingpaths;
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fusedirpath = fs::path::dirname(fusepath_);
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rv = searchFunc_(branches_,fusedirpath,&existingpaths);
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if(rv == -1)
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return -errno;
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rv = createFunc_(branches_,fusedirpath,&createpaths);
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if(rv == -1)
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return -errno;
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rv = fs::clonepath_as_root(existingpaths[0],createpaths[0],fusedirpath);
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if(rv == -1)
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return -errno;
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return l::create_core(createpaths[0],
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fusepath_,
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ffi_,
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mode_,
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umask_);
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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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create(const char *fusepath_,
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mode_t mode_,
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fuse_file_info_t *ffi_)
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{
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int rv;
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Config::Read cfg;
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const fuse_context *fc = fuse_get_context();
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const ugid::Set ugid(fc->uid,fc->gid);
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utils::cfg_to_ffi_flags(cfg,fc->pid,ffi_);
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if(cfg->writeback_cache)
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utils::tweak_flags_writeback_cache(&ffi_->flags);
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ffi_->noflush = !utils::calculate_flush(cfg->flushonclose,
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ffi_->flags);
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rv = l::create(cfg->func.getattr.policy,
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cfg->func.create.policy,
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cfg->branches,
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fusepath_,
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ffi_,
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mode_,
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fc->umask);
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if(rv == -EROFS)
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{
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Config::Write()->branches.find_and_set_mode_ro();
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rv = l::create(cfg->func.getattr.policy,
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cfg->func.create.policy,
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cfg->branches,
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fusepath_,
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ffi_,
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mode_,
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fc->umask);
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}
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return rv;
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}
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}
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