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129 lines
3.0 KiB
129 lines
3.0 KiB
/*
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Copyright (c) 2019, 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 "branch.hpp"
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#include "errno.hpp"
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#include "fs_base_close.hpp"
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#include "fs_base_getdents.hpp"
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#include "fs_base_open.hpp"
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#include "fs_base_stat.hpp"
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#include "fs_devid.hpp"
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#include "fs_inode.hpp"
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#include "fs_path.hpp"
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#include "hashset.hpp"
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#include "linux_dirent.h"
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#include "mempools.hpp"
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#include <fuse.h>
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#include <fuse_dirents.h>
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#include <string>
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#include <vector>
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#include <stddef.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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int
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close_free_ret_enomem(int fd_,
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void *buf_)
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{
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fs::close(fd_);
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g_DENTS_BUF_POOL.free(buf_);
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return -ENOMEM;
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}
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static
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int
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readdir(const Branches &branches_,
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const char *dirname_,
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fuse_dirents_t *buf_)
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{
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int rv;
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dev_t dev;
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char *buf;
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HashSet names;
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string basepath;
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uint64_t namelen;
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struct linux_dirent *d;
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buf = (char*)g_DENTS_BUF_POOL.alloc();
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if(buf == NULL)
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return -ENOMEM;
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for(size_t i = 0, ei = branches_.size(); i != ei; i++)
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{
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int dirfd;
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int64_t nread;
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basepath = fs::path::make(&branches_[i].path,dirname_);
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dirfd = fs::open_dir_ro(basepath);
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if(dirfd == -1)
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continue;
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dev = fs::devid(dirfd);
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if(dev == (dev_t)-1)
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dev = i;
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for(;;)
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{
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nread = fs::getdents(dirfd,buf,g_DENTS_BUF_POOL.size());
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if(nread == -1)
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break;
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if(nread == 0)
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break;
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for(int64_t pos = 0; pos < nread; pos += d->reclen)
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{
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d = (struct linux_dirent*)(buf + pos);
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namelen = strlen(d->name);
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rv = names.put(d->name,namelen);
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if(rv == 0)
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continue;
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d->ino = fs::inode::recompute(d->ino,dev);
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rv = fuse_dirents_add_linux(buf_,d,namelen);
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if(rv)
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return close_free_ret_enomem(dirfd,buf);
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}
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}
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fs::close(dirfd);
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}
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g_DENTS_BUF_POOL.free(buf);
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return 0;
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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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readdir_linux(const Branches &branches_,
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const char *dirname_,
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fuse_dirents_t *buf_)
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{
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return l::readdir(branches_,dirname_,buf_);
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}
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}
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