451 lines
11 KiB
C++
451 lines
11 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012, 2013, 2014, 2015.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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inode.cpp
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Interfaces and utility classes for implementing inodes.
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*******************************************************************************/
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#include <errno.h>
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#include <limits.h>
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#include <string.h>
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#include <sortix/clock.h>
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#include <sortix/stat.h>
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#include <sortix/statvfs.h>
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#include <sortix/kernel/inode.h>
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#include <sortix/kernel/interlock.h>
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#include <sortix/kernel/ioctx.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/refcount.h>
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#include <sortix/kernel/time.h>
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namespace Sortix {
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AbstractInode::AbstractInode()
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{
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metalock = KTHREAD_MUTEX_INITIALIZER;
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inode_type = INODE_TYPE_UNKNOWN;
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stat_mode = 0;
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stat_nlink = 0;
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stat_uid = 0;
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stat_gid = 0;
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stat_size = 0;
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stat_atim = Time::Get(CLOCK_REALTIME);
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stat_ctim = Time::Get(CLOCK_REALTIME);
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stat_mtim = Time::Get(CLOCK_REALTIME);
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stat_blksize = 0;
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stat_blocks = 0;
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}
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AbstractInode::~AbstractInode()
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{
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}
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void AbstractInode::linked()
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{
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InterlockedIncrement(&stat_nlink);
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}
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void AbstractInode::unlinked()
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{
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InterlockedDecrement(&stat_nlink);
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}
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int AbstractInode::sync(ioctx_t* /*ctx*/)
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{
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return 0;
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}
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int AbstractInode::stat(ioctx_t* ctx, struct stat* st)
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{
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struct stat retst;
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ScopedLock lock(&metalock);
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memset(&retst, 0, sizeof(retst));
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retst.st_dev = dev;
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retst.st_rdev = dev;
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retst.st_ino = ino;
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retst.st_mode = stat_mode;
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retst.st_nlink = (nlink_t) stat_nlink;
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retst.st_uid = stat_uid;
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retst.st_gid = stat_gid;
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retst.st_size = stat_size;
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retst.st_atim = stat_atim;
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retst.st_ctim = stat_ctim;
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retst.st_mtim = stat_mtim;
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retst.st_blksize = stat_blksize;
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retst.st_blocks = stat_size / 512;
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if ( !ctx->copy_to_dest(st, &retst, sizeof(retst)) )
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return -1;
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return 0;
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}
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// TODO: Provide an easier mechanism for letting subclasses give this
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// information than overriding this method. Additionally, what should be
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// done in abstract kernel objects where this call doesn't make that much
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// sense?
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int AbstractInode::statvfs(ioctx_t* ctx, struct statvfs* stvfs)
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{
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struct statvfs retstvfs;
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ScopedLock lock(&metalock);
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memset(&retstvfs, 0, sizeof(retstvfs));
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retstvfs.f_bsize = 0;
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retstvfs.f_frsize = 0;
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retstvfs.f_blocks = 0;
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retstvfs.f_bfree = 0;
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retstvfs.f_bavail = 0;
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retstvfs.f_files = 0;
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retstvfs.f_ffree = 0;
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retstvfs.f_favail = 0;
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retstvfs.f_fsid = dev;
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retstvfs.f_flag = ST_NOSUID;
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retstvfs.f_namemax = ULONG_MAX;
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if ( !ctx->copy_to_dest(stvfs, &retstvfs, sizeof(retstvfs)) )
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return -1;
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return 0;
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}
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int AbstractInode::chmod(ioctx_t* /*ctx*/, mode_t mode)
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{
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ScopedLock lock(&metalock);
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stat_mode = (mode & S_SETABLE) | this->type;
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return 0;
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}
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int AbstractInode::chown(ioctx_t* /*ctx*/, uid_t owner, gid_t group)
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{
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ScopedLock lock(&metalock);
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stat_uid = owner;
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stat_gid= group;
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return 0;
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}
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int AbstractInode::truncate(ioctx_t* /*ctx*/, off_t /*length*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EISDIR, -1;
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return errno = EINVAL, -1;
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}
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off_t AbstractInode::lseek(ioctx_t* /*ctx*/, off_t /*offset*/, int /*whence*/)
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{
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if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
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return errno = ESPIPE, -1;
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return errno = EBADF, -1;
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}
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ssize_t AbstractInode::read(ioctx_t* /*ctx*/, uint8_t* /*buf*/,
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size_t /*count*/)
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{
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return errno = EBADF, -1;
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}
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ssize_t AbstractInode::pread(ioctx_t* /*ctx*/, uint8_t* /*buf*/,
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size_t /*count*/, off_t /*off*/)
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{
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if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
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return errno = ESPIPE, -1;
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return errno = EBADF, -1;
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}
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ssize_t AbstractInode::write(ioctx_t* /*ctx*/, const uint8_t* /*buf*/,
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size_t /*count*/)
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{
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return errno = EBADF, -1;
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}
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ssize_t AbstractInode::pwrite(ioctx_t* /*ctx*/, const uint8_t* /*buf*/,
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size_t /*count*/, off_t /*off*/)
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{
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if ( inode_type == INODE_TYPE_STREAM || inode_type == INODE_TYPE_TTY )
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return errno = ESPIPE, -1;
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return errno = EBADF, -1;
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}
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int AbstractInode::utimens(ioctx_t* /*ctx*/, const struct timespec* atime,
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const struct timespec* ctime,
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const struct timespec* mtime)
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{
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ScopedLock lock(&metalock);
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if ( atime )
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stat_atim = *atime;
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if ( ctime )
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stat_ctim = *ctime;
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if ( mtime )
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stat_mtim = *mtime;
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return 0;
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}
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int AbstractInode::isatty(ioctx_t* /*ctx*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return 1;
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return errno = ENOTTY, 0;
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}
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ssize_t AbstractInode::readdirents(ioctx_t* /*ctx*/,
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struct kernel_dirent* /*dirent*/,
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size_t /*size*/, off_t /*start*/,
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size_t /*maxcount*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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Ref<Inode> AbstractInode::open(ioctx_t* /*ctx*/, const char* /*filename*/,
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int /*flags*/, mode_t /*mode*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, Ref<Inode>(NULL);
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return errno = ENOTDIR, Ref<Inode>(NULL);
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}
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int AbstractInode::mkdir(ioctx_t* /*ctx*/, const char* /*filename*/,
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mode_t /*mode*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::link(ioctx_t* /*ctx*/, const char* /*filename*/,
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Ref<Inode> /*node*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::link_raw(ioctx_t* /*ctx*/, const char* /*filename*/,
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Ref<Inode> /*node*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::unlink(ioctx_t* /*ctx*/, const char* /*filename*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::unlink_raw(ioctx_t* /*ctx*/, const char* /*filename*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::rmdir(ioctx_t* /*ctx*/, const char* /*filename*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::rmdir_me(ioctx_t* /*ctx*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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int AbstractInode::symlink(ioctx_t* /*ctx*/, const char* /*oldname*/,
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const char* /*filename*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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ssize_t AbstractInode::readlink(ioctx_t* /*ctx*/, char* /*buf*/,
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size_t /*bufsiz*/)
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{
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return errno = EINVAL, -1;
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}
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int AbstractInode::tcgetwincurpos(ioctx_t* /*ctx*/, struct wincurpos* /*wcp*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcgetwinsize(ioctx_t* /*ctx*/, struct winsize* /*ws*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcsetpgrp(ioctx_t* /*ctx*/, pid_t /*pgid*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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pid_t AbstractInode::tcgetpgrp(ioctx_t* /*ctx*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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int AbstractInode::settermmode(ioctx_t* /*ctx*/, unsigned /*mode*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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int AbstractInode::gettermmode(ioctx_t* /*ctx*/, unsigned* /*mode*/)
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{
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if ( inode_type == INODE_TYPE_TTY )
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return errno = EBADF, -1;
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return errno = ENOTTY, -1;
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}
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int AbstractInode::poll(ioctx_t* /*ctx*/, PollNode* /*node*/)
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{
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#if 0 // TODO: Support poll on regular files as per POSIX.
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if ( inode_type == INODE_TYPE_FILE )
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{
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// TODO: Correct bits?
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if ( !((POLLIN | POLLOUT) & node->events) )
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return errno = EAGAIN, -1;
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node->master->revents |= (POLLIN | POLLOUT) & node->events;
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return 0;
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}
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#endif
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return errno = ENOTSUP, -1;
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}
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int AbstractInode::rename_here(ioctx_t* /*ctx*/, Ref<Inode> /*from*/,
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const char* /*oldname*/, const char* /*newname*/)
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{
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if ( inode_type == INODE_TYPE_DIR )
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return errno = EBADF, -1;
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return errno = ENOTDIR, -1;
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}
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Ref<Inode> AbstractInode::accept(ioctx_t* /*ctx*/, uint8_t* /*addr*/,
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size_t* /*addrlen*/, int /*flags*/)
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{
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return errno = ENOTSOCK, Ref<Inode>();
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}
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int AbstractInode::bind(ioctx_t* /*ctx*/, const uint8_t* /*addr*/,
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size_t /*addrlen*/)
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{
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return errno = ENOTSOCK, -1;
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}
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int AbstractInode::connect(ioctx_t* /*ctx*/, const uint8_t* /*addr*/,
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size_t /*addrlen*/)
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{
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return errno = ENOTSOCK, -1;
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}
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int AbstractInode::listen(ioctx_t* /*ctx*/, int /*backlog*/)
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{
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return errno = ENOTSOCK, -1;
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}
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ssize_t AbstractInode::recv(ioctx_t* /*ctx*/, uint8_t* /*buf*/,
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size_t /*count*/, int /*flags*/)
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{
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return errno = ENOTSOCK, -1;
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}
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ssize_t AbstractInode::send(ioctx_t* /*ctx*/, const uint8_t* /*buf*/,
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size_t /*count*/, int /*flags*/)
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{
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return errno = ENOTSOCK, -1;
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}
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int AbstractInode::getsockopt(ioctx_t* /*ctx*/, int /*level*/, int /*option_name*/,
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void* /*option_value*/, size_t* /*option_size_ptr*/)
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{
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return errno = ENOTSOCK, -1;
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}
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int AbstractInode::setsockopt(ioctx_t* /*ctx*/, int /*level*/, int /*option_name*/,
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const void* /*option_value*/, size_t /*option_size*/)
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{
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return errno = ENOTSOCK, -1;
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}
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ssize_t AbstractInode::tcgetblob(ioctx_t* /*ctx*/, const char* /*name*/, void* /*buffer*/, size_t /*count*/)
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{
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return errno = ENOTTY, -1;
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}
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ssize_t AbstractInode::tcsetblob(ioctx_t* /*ctx*/, const char* /*name*/, const void* /*buffer*/, size_t /*count*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::unmounted(ioctx_t* /*ctx*/)
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{
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return 0;
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}
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int AbstractInode::tcdrain(ioctx_t* /*ctx*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcflow(ioctx_t* /*ctx*/, int /*action*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcflush(ioctx_t* /*ctx*/, int /*queue_selector*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcgetattr(ioctx_t* /*ctx*/, struct termios* /*tio*/)
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{
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return errno = ENOTTY, -1;
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}
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pid_t AbstractInode::tcgetsid(ioctx_t* /*ctx*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcsendbreak(ioctx_t* /*ctx*/, int /*duration*/)
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{
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return errno = ENOTTY, -1;
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}
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int AbstractInode::tcsetattr(ioctx_t* /*ctx*/, int /*actions*/, const struct termios* /*tio*/)
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{
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return errno = ENOTTY, -1;
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}
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} // namespace Sortix
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