| // Copyright 2021 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef THIRD_PARTY_F2FS_DIR_H_ |
| #define THIRD_PARTY_F2FS_DIR_H_ |
| |
| #include <dirent.h> |
| #include <sys/stat.h> |
| |
| namespace f2fs { |
| |
| const unsigned char kFiletypeTable[static_cast<uint8_t>(FileType::kFtMax)] = { |
| [static_cast<uint8_t>(FileType::kFtUnknown)] = DT_UNKNOWN, |
| [static_cast<uint8_t>(FileType::kFtRegFile)] = DT_REG, |
| [static_cast<uint8_t>(FileType::kFtDir)] = DT_DIR, |
| [static_cast<uint8_t>(FileType::kFtChrdev)] = DT_CHR, |
| [static_cast<uint8_t>(FileType::kFtBlkdev)] = DT_BLK, |
| [static_cast<uint8_t>(FileType::kFtFifo)] = DT_FIFO, |
| [static_cast<uint8_t>(FileType::kFtSock)] = DT_SOCK, |
| [static_cast<uint8_t>(FileType::kFtSymlink)] = DT_LNK, |
| }; |
| |
| constexpr unsigned int kStatShift = 12; |
| |
| const unsigned char kTypeByMode[S_IFMT >> kStatShift] = { |
| [S_IFREG >> kStatShift] = static_cast<uint8_t>(FileType::kFtRegFile), |
| [S_IFDIR >> kStatShift] = static_cast<uint8_t>(FileType::kFtDir), |
| [S_IFCHR >> kStatShift] = static_cast<uint8_t>(FileType::kFtChrdev), |
| [S_IFBLK >> kStatShift] = static_cast<uint8_t>(FileType::kFtBlkdev), |
| [S_IFIFO >> kStatShift] = static_cast<uint8_t>(FileType::kFtFifo), |
| [S_IFSOCK >> kStatShift] = static_cast<uint8_t>(FileType::kFtSock), |
| [S_IFLNK >> kStatShift] = static_cast<uint8_t>(FileType::kFtSymlink), |
| }; |
| |
| class Dir : public VnodeF2fs { |
| public: |
| explicit Dir(F2fs *fs); |
| explicit Dir(F2fs *fs, ino_t ino); |
| ~Dir() = default; |
| |
| zx_status_t Lookup(std::string_view name, fbl::RefPtr<fs::Vnode> *out) final; |
| zx_status_t Readdir(fs::VdirCookie *cookie, void *dirents, size_t len, size_t *out_actual) final; |
| zx_status_t Create(std::string_view name, uint32_t mode, fbl::RefPtr<fs::Vnode> *out) final; |
| zx_status_t Link(std::string_view name, fbl::RefPtr<fs::Vnode> _target) final; |
| zx_status_t Unlink(std::string_view name, bool must_be_dir) final; |
| zx_status_t Rename(fbl::RefPtr<fs::Vnode> _newdir, std::string_view oldname, |
| std::string_view newname, bool src_must_be_dir, bool dst_must_be_dir); |
| |
| uint64_t DirBlocks(); |
| static unsigned int DirBuckets(unsigned int level); |
| static unsigned int BucketBlocks(unsigned int level); |
| void SetDeType(DirEntry *de, VnodeF2fs *vnode); |
| static uint64_t DirBlockIndex(unsigned int level, unsigned int idx); |
| bool EarlyMatchName(const char *name, int namelen, f2fs_hash_t namehash, DirEntry *de); |
| DirEntry *FindInBlock(Page *dentry_page, const char *name, int namelen, int *max_slots, |
| f2fs_hash_t namehash, Page **res_page); |
| DirEntry *FindInLevel(unsigned int level, std::string_view name, int namelen, |
| f2fs_hash_t namehash, Page **res_page); |
| DirEntry *FindEntry(std::string_view name, Page **res_page); |
| DirEntry *ParentDir(Page **p); |
| ino_t InodeByName(std::string_view name); |
| void SetLink(DirEntry *de, Page *page, VnodeF2fs *inode); |
| void InitDentInode(VnodeF2fs *vnode, Page *ipage); |
| #if 0 // porting needed |
| // zx_status_t InitInodeMetadata(VnodeF2fs *vnode, dentry *dentry); |
| #else |
| zx_status_t InitInodeMetadata(VnodeF2fs *vnode); |
| #endif |
| void UpdateParentMetadata(VnodeF2fs *inode, unsigned int current_depth); |
| int RoomForFilename(DentryBlock *dentry_blk, int slots); |
| zx_status_t AddLink(std::string_view name, VnodeF2fs *vnode); |
| void DeleteEntry(DirEntry *dentry, Page *page, VnodeF2fs *vnode); |
| zx_status_t MakeEmpty(VnodeF2fs *vnode, VnodeF2fs *parent); |
| bool IsEmptyDir(); |
| |
| zx_status_t NewInode(uint32_t mode, fbl::RefPtr<VnodeF2fs> *out); |
| int IsMultimediaFile(const char *s, const char *sub); |
| void SetColdFile(const char *name, VnodeF2fs *vnode); |
| zx_status_t DoCreate(std::string_view name, uint32_t mode, fbl::RefPtr<fs::Vnode> *out); |
| #if 0 // porting needed |
| // int F2fsLink(dentry *old_dentry, dentry *dentry); |
| // dentry *F2fsGetParent(dentry *child); |
| #endif |
| zx_status_t DoUnlink(VnodeF2fs *vnode, std::string_view name); |
| #if 0 // porting needed |
| // int F2fsSymlink(dentry *dentry, const char *symname); |
| #endif |
| zx_status_t Mkdir(std::string_view name, uint32_t mode, fbl::RefPtr<fs::Vnode> *out); |
| zx_status_t Rmdir(Dir *vnode, std::string_view name); |
| #if 0 // porting needed |
| // int F2fsMknod(dentry *dentry, umode_t mode, dev_t rdev); |
| #endif |
| zx_status_t DoLookup(std::string_view name, fbl::RefPtr<fs::Vnode> *out); |
| // Check if possible_child is its subdir |
| zx::status<bool> IsSubdir(Dir *possible_dir); |
| |
| DirEntry *FindInInlineDir(const std::string_view &name, Page **res_page); |
| DirEntry *ParentInlineDir(Page **p); |
| zx_status_t MakeEmptyInlineDir(VnodeF2fs *vnode, VnodeF2fs *parent); |
| unsigned int RoomInInlineDir(InlineDentry *dentry_blk, int slots); |
| zx_status_t ConvertInlineDir(InlineDentry *inline_dentry); |
| zx_status_t AddInlineEntry(std::string_view name, VnodeF2fs *vnode, bool *is_converted); |
| void DeleteInlineEntry(DirEntry *dentry, Page *page, VnodeF2fs *vnode); |
| bool IsEmptyInlineDir(); |
| zx_status_t ReadInlineDir(fs::VdirCookie *cookie, void *dirents, size_t len, size_t *out_actual); |
| }; |
| |
| } // namespace f2fs |
| |
| #endif // THIRD_PARTY_F2FS_DIR_H_ |