83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
// SPDX-License-Identifier: ISC
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#include <zinnia/chardev.h>
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void chardev_init(
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struct chardev* dev,
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const struct chardev_ops* ops,
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const struct vfs_file_ops* file_ops,
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uint32_t major,
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uint32_t minor
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) {
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refcount_init(&dev->rc);
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dev->ops = ops;
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dev->file_ops = file_ops;
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dev->dev = dev_make(major, minor);
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}
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void chardev_ref(struct chardev* dev) {
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refcount_inc(&dev->rc);
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}
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void chardev_unref(struct chardev* dev) {
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if (refcount_dec(&dev->rc) && dev->ops && dev->ops->destroy)
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dev->ops->destroy(dev);
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}
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static errno_t chardev_node_open(struct vfs_node* node, struct vfs_file* file) {
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struct chardev* dev = node->priv;
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file->ops = dev->file_ops;
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if (dev->ops && dev->ops->open)
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return dev->ops->open(dev, file);
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return 0;
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}
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static void chardev_node_destroy(struct vfs_node* node) {
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chardev_unref(node->priv);
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}
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static const struct vfs_node_ops chardev_node_ops = {
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.destroy = chardev_node_destroy,
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.device = {
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.open = chardev_node_open,
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},
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};
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errno_t devtmpfs_add_chardev(const char* name, struct chardev* dev, mode_t mode) {
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struct vfs_mknod_target target = {
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.type = VNODE_CHARDEV,
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.ops = &chardev_node_ops,
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.priv = dev,
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.rdev = dev->dev,
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};
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chardev_ref(dev);
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struct vfs_path root = devtmpfs_root();
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errno_t status = vfs_mknod(root, root, name, mode, &target, ident_kernel(), nullptr);
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vfs_path_drop(root);
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if (status)
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chardev_unref(dev);
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return status;
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}
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errno_t devtmpfs_mkdir(const char* name, mode_t mode) {
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struct vfs_path root = devtmpfs_root();
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errno_t status = vfs_mkdir(root, root, name, mode, ident_kernel());
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vfs_path_drop(root);
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return status;
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}
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errno_t devtmpfs_remove(const char* name) {
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struct vfs_path root = devtmpfs_root();
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errno_t status = vfs_unlink(root, root, name, ident_kernel());
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vfs_path_drop(root);
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return status;
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}
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errno_t devtmpfs_symlink(const char* name, const char* target) {
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struct vfs_path root = devtmpfs_root();
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errno_t status = vfs_symlink(root, root, name, target, ident_kernel());
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vfs_path_drop(root);
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return status;
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}
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