1
0
Fork 0
mirror of https://gitlab.com/sortix/sortix.git synced 2023-02-13 20:55:38 -05:00
sortix--sortix/sortix/inode.cpp
2013-12-17 14:30:26 +01:00

292 lines
7.3 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
inode.cpp
Interfaces and utility classes for implementing inodes.
*******************************************************************************/
#include <errno.h>
#include <string.h>
#include <sortix/stat.h>
#include <sortix/kernel/platform.h>
#include <sortix/kernel/interlock.h>
#include <sortix/kernel/kthread.h>
#include <sortix/kernel/refcount.h>
#include <sortix/kernel/inode.h>
#include <sortix/kernel/ioctx.h>
namespace Sortix {
AbstractInode::AbstractInode()
{
metalock = KTHREAD_MUTEX_INITIALIZER;
inode_type = INODE_TYPE_UNKNOWN;
stat_mode = 0;
stat_nlink = 0;
stat_uid = 0;
stat_gid = 0;
stat_size = 0;
stat_atime = 0;
stat_mtime = 0;
stat_ctime = 0;
/* TODO: stat_atim, stat_mtim, stat_ctim */
stat_blksize = 0;
stat_blocks = 0;
}
AbstractInode::~AbstractInode()
{
}
void AbstractInode::linked()
{
InterlockedIncrement(&stat_nlink);
}
void AbstractInode::unlinked()
{
InterlockedDecrement(&stat_nlink);
}
int AbstractInode::sync(ioctx_t* /*ctx*/)
{
return 0;
}
int AbstractInode::stat(ioctx_t* ctx, struct stat* st)
{
struct stat retst;
ScopedLock lock(&metalock);
memset(&retst, 0, sizeof(retst));
retst.st_dev = dev;
retst.st_ino = ino;
retst.st_mode = stat_mode;
retst.st_nlink = (nlink_t) stat_nlink;
retst.st_uid = stat_uid;
retst.st_gid = stat_gid;
retst.st_size = stat_size;
// TODO: Keep track of time.
retst.st_blksize = stat_blksize;
retst.st_blocks = stat_size / 512;
if ( !ctx->copy_to_dest(st, &retst, sizeof(retst)) )
return -1;
return 0;
}
int AbstractInode::chmod(ioctx_t* /*ctx*/, mode_t mode)
{
ScopedLock lock(&metalock);
stat_mode = (mode & S_SETABLE) | this->type;
return 0;
}
int AbstractInode::chown(ioctx_t* /*ctx*/, uid_t owner, gid_t group)
{
ScopedLock lock(&metalock);
stat_uid = owner;
stat_gid= group;
return 0;
}
int AbstractInode::truncate(ioctx_t* /*ctx*/, off_t /*length*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EISDIR, -1;
return errno = EINVAL, -1;
}
off_t AbstractInode::lseek(ioctx_t* /*ctx*/, off_t /*offset*/, int /*whence*/)
{
if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
return errno = ESPIPE, -1;
return errno = EBADF, -1;
}
ssize_t AbstractInode::read(ioctx_t* /*ctx*/, uint8_t* /*buf*/,
size_t /*count*/)
{
return errno = EBADF, -1;
}
ssize_t AbstractInode::pread(ioctx_t* /*ctx*/, uint8_t* /*buf*/,
size_t /*count*/, off_t /*off*/)
{
if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
return errno = ESPIPE, -1;
return errno = EBADF, -1;
}
ssize_t AbstractInode::write(ioctx_t* /*ctx*/, const uint8_t* /*buf*/,
size_t /*count*/)
{
return errno = EBADF, -1;
}
ssize_t AbstractInode::pwrite(ioctx_t* /*ctx*/, const uint8_t* /*buf*/,
size_t /*count*/, off_t /*off*/)
{
if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
return errno = ESPIPE, -1;
return errno = EBADF, -1;
}
int AbstractInode::utimes(ioctx_t* /*ctx*/, const struct timeval /*times*/[2])
{
// TODO: Implement this!
return 0;
}
int AbstractInode::isatty(ioctx_t* /*ctx*/)
{
if ( inode_type == INODE_TYPE_TTY )
return 1;
return errno = ENOTTY, 0;
}
ssize_t AbstractInode::readdirents(ioctx_t* /*ctx*/,
struct kernel_dirent* /*dirent*/,
size_t /*size*/, off_t /*start*/,
size_t /*maxcount*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
Ref<Inode> AbstractInode::open(ioctx_t* /*ctx*/, const char* /*filename*/,
int /*flags*/, mode_t /*mode*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, Ref<Inode>(NULL);
return errno = ENOTDIR, Ref<Inode>(NULL);
}
int AbstractInode::mkdir(ioctx_t* /*ctx*/, const char* /*filename*/,
mode_t /*mode*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::link(ioctx_t* /*ctx*/, const char* /*filename*/,
Ref<Inode> /*node*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::link_raw(ioctx_t* /*ctx*/, const char* /*filename*/,
Ref<Inode> /*node*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::unlink(ioctx_t* /*ctx*/, const char* /*filename*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::unlink_raw(ioctx_t* /*ctx*/, const char* /*filename*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::rmdir(ioctx_t* /*ctx*/, const char* /*filename*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::rmdir_me(ioctx_t* /*ctx*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
int AbstractInode::symlink(ioctx_t* /*ctx*/, const char* /*oldname*/,
const char* /*filename*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
ssize_t AbstractInode::readlink(ioctx_t* /*ctx*/, char* /*buf*/,
size_t /*bufsiz*/)
{
return errno = EINVAL, -1;
}
int AbstractInode::tcgetwinsize(ioctx_t* /*ctx*/, struct winsize* /*ws*/)
{
if ( inode_type == INODE_TYPE_TTY )
return errno = EBADF, -1;
return errno = ENOTTY, -1;
}
int AbstractInode::settermmode(ioctx_t* /*ctx*/, unsigned /*mode*/)
{
if ( inode_type == INODE_TYPE_TTY )
return errno = EBADF, -1;
return errno = ENOTTY, -1;
}
int AbstractInode::gettermmode(ioctx_t* /*ctx*/, unsigned* /*mode*/)
{
if ( inode_type == INODE_TYPE_TTY )
return errno = EBADF, -1;
return errno = ENOTTY, -1;
}
int AbstractInode::poll(ioctx_t* /*ctx*/, PollNode* /*node*/)
{
#if 0 // TODO: Support poll on regular files as per POSIX.
if ( inode_type == INODE_TYPE_FILE )
{
// TODO: Correct bits?
node->revents |= (POLLIN | POLLOUT) & node->events;
// TODO: What if not listening on events (POLLIN | POLLOUT)?
return 0;
}
#endif
return errno = ENOTSUP, -1;
}
int AbstractInode::rename_here(ioctx_t* /*ctx*/, Ref<Inode> /*from*/,
const char* /*oldname*/, const char* /*newname*/)
{
if ( inode_type == INODE_TYPE_DIR )
return errno = EBADF, -1;
return errno = ENOTDIR, -1;
}
} // namespace Sortix