100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
/*
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* Copyright (c) 2012, 2013, 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and 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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*
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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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* fs/kram.h
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* Kernel RAM filesystem.
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*/
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#ifndef SORTIX_FS_KRAM_H
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#define SORTIX_FS_KRAM_H
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#include <sortix/kernel/inode.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/fcache.h>
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namespace Sortix {
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namespace KRAMFS {
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struct DirEntry
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{
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Ref<Inode> inode;
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char* name;
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};
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class File : public AbstractInode
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{
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public:
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File(InodeType inode_type, mode_t type, dev_t dev, ino_t ino, uid_t owner,
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gid_t group, mode_t mode);
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virtual ~File();
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virtual int truncate(ioctx_t* ctx, off_t length);
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virtual off_t lseek(ioctx_t* ctx, off_t offset, int whence);
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virtual ssize_t pread(ioctx_t* ctx, uint8_t* buf, size_t count,
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off_t off);
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virtual ssize_t pwrite(ioctx_t* ctx, const uint8_t* buf, size_t count,
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off_t off);
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virtual ssize_t readlink(ioctx_t* ctx, char* buf, size_t bufsiz);
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virtual ssize_t tcgetblob(ioctx_t* ctx, const char* name, void* buffer,
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size_t count);
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virtual int statvfs(ioctx_t* ctx, struct statvfs* stvfs);
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private:
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FileCache fcache;
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};
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class Dir : public AbstractInode
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{
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public:
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Dir(dev_t dev, ino_t ino, uid_t owner, gid_t group, mode_t mode);
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virtual ~Dir();
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virtual ssize_t readdirents(ioctx_t* ctx, struct dirent* dirent,
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size_t size, off_t start);
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virtual Ref<Inode> open(ioctx_t* ctx, const char* filename, int flags,
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mode_t mode);
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virtual int mkdir(ioctx_t* ctx, const char* filename, mode_t mode);
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virtual int link(ioctx_t* ctx, const char* filename, Ref<Inode> node);
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virtual int link_raw(ioctx_t* ctx, const char* filename, Ref<Inode> node);
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virtual int unlink(ioctx_t* ctx, const char* filename);
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virtual int unlink_raw(ioctx_t* ctx, const char* filename);
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virtual int rmdir(ioctx_t* ctx, const char* filename);
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virtual int rmdir_me(ioctx_t* ctx);
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virtual int symlink(ioctx_t* ctx, const char* oldname,
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const char* filename);
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virtual int rename_here(ioctx_t* ctx, Ref<Inode> from, const char* oldname,
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const char* newname);
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virtual ssize_t tcgetblob(ioctx_t* ctx, const char* name, void* buffer,
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size_t count);
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virtual int statvfs(ioctx_t* ctx, struct statvfs* stvfs);
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private:
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size_t FindChild(const char* filename);
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bool AddChild(const char* filename, Ref<Inode> inode);
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void RemoveChild(size_t index);
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private:
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kthread_mutex_t dir_lock;
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size_t children_used;
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size_t children_length;
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DirEntry* children;
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bool shut_down;
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};
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} // namespace KRAMFS
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} // namespace Sortix
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#endif
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