ioctl.c

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#include <core/system.h>
#include <fs/vfs.h>
#include <dev/dev.h>

int vfs_ioctl(struct vnode *vnode, unsigned long request, void *argp)
{
    vfs_log(LOG_DEBUG, "vfs_ioctl(vnode=%p, request=%ld, argp=%p)\n", vnode, (int64_t) request, argp);
 
    /* invalid request */
    if (!vnode)
        return -EINVAL;
 
    /* a device node: the driver handles it */
    if (ISDEV(vnode))
        return kdev_ioctl(&VNODE_DEV(vnode), request, argp);
 
    /* invalid request */
    if (!vnode->fs)
        return -EINVAL;
 
    /* the filesystem doesn't support it */
    if (!vnode->fs->vops.ioctl)
        return -ENOSYS;
 
    return vnode->fs->vops.ioctl(vnode, request, argp);
}