static int sysfs_mount(char *source, char *tgt, uint32_t flags, void *args)
{
struct fnode *tgt_dir = NULL;
/* Source must be NULL */
if (source)
return -1;
/* Target must be a valid dir */
if (!tgt)
return -1;
tgt_dir = fno_search(tgt);
if (!tgt_dir || ((tgt_dir->flags & FL_DIR) == 0)) {
/* Not a valid mountpoint. */
return -1;
}
/* TODO: check empty dir
if (tgt_dir->children) {
return -1;
}
*/
tgt_dir->owner = &mod_sysfs;
sysfs_register("time", "/sys", sysfs_time_read, sysfs_no_write);
sysfs_register("tasks","/sys", sysfs_tasks_read, sysfs_no_write);
sysfs_register("mem", "/sys", sysfs_mem_read, sysfs_no_write);
sysfs_register("modules", "/sys", sysfs_modules_read, sysfs_no_write);
sysfs_register("mtab", "/sys", sysfs_mtab_read, sysfs_no_write);
#if defined(STM32F4) || defined(STM32F7)
sysfs_register("pins", "/sys", sysfs_pins_read, sysfs_no_write);
#endif
return 0;
}
static int klog_open(const char *path, int flags)
{
if (klog.used)
return -EBUSY;
klog.used++;
return task_filedesc_add(fno_search("/dev/klog"));
}
static int memfs_mount(char *source, char *tgt, uint32_t flags, void *arg)
{
struct fnode *tgt_dir = NULL;
/* Source must be NULL */
if (source)
return -1;
/* Target must be a valid dir */
if (!tgt)
return -1;
tgt_dir = fno_search(tgt);
if (!tgt_dir || ((tgt_dir->flags & FL_DIR) == 0)) {
/* Not a valid mountpoint. */
return -1;
}
/* TODO: Check empty dir
if (tgt_dir->children) {
return -1;
}
*/
tgt_dir->owner = &mod_memfs;
return 0;
}
void sysfs_init(void)
{
mod_sysfs.family = FAMILY_FILE;
strcpy(mod_sysfs.name, "sysfs");
mod_sysfs.mount = sysfs_mount;
mod_sysfs.ops.read = sysfs_read;
mod_sysfs.ops.poll = sysfs_poll;
mod_sysfs.ops.write = sysfs_write;
mod_sysfs.ops.close = sysfs_close;
sysfs = fno_search("/sys");
register_module(&mod_sysfs);
fno_mkdir(&mod_sysfs, "net", sysfs);
sysfs_mutex = mutex_init();
}
int sysfs_register(char *name, char *dir,
int (*do_read)(struct sysfs_fnode *sfs, void *buf, int len),
int (*do_write)(struct sysfs_fnode *sfs, const void *buf, int len) )
{
struct fnode *fno = fno_create(&mod_sysfs, name, fno_search(dir));
struct sysfs_fnode *mfs;
if (!fno)
return -1;
mfs = kalloc(sizeof(struct sysfs_fnode));
if (mfs) {
mfs->fnode = fno;
fno->priv = mfs;
mfs->do_read = do_read;
mfs->do_write = do_write;
return 0;
}
return -1;
}