embox

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/**
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 * @brief
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 *
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 * @date 02.01.24
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 * @author Aleksey Zhmulin
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 */
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#include <stdbool.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <kernel/spinlock.h>
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#include <lib/libds/dlist.h>
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#include <util/err.h>
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#include <vfs/core.h>
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void vfs_super_block_init(struct super_block *sb,
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    const struct vfs_driver *drv) {
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	struct inode mpt;
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	sb->drv = drv;
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	sb->usage_count = 0;
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	sb->bind_mount = false;
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	sb->mount_point.ino = VFS_BAD_INO;
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	sb->mount_point.sb = NULL;
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	dlist_init(&sb->list_item);
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	dlist_init(&sb->mount_list);
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	spin_init(&sb->lock, __SPIN_UNLOCKED);
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	mpt.ino = VFS_MPT_INO;
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	mpt.sb = sb;
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	vfs_inode_init(&mpt, S_IRWXA | S_IFDIR);
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}
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void vfs_super_block_deinit(struct super_block *sb) {
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	dlist_del(&sb->list_item);
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}
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struct super_block *vfs_super_block_mount(const char *name,
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    struct block_dev *bdev, bool bind_mount) {
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	const struct vfs_driver *drv;
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	struct super_block *sb;
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	drv = vfs_driver_find(name);
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	if (!drv) {
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		return err2ptr(ENOENT);
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	}
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	sb = drv->ops.mount(bdev);
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	if (ptr2err(sb)) {
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		return sb;
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	}
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	vfs_super_block_init(sb, drv);
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	sb->bind_mount = bind_mount;
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	return sb;
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}
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int vfs_super_block_unmount(struct super_block *sb) {
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	if (!dlist_empty(&sb->mount_list) || (sb->usage_count != 0)) {
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		return -EBUSY;
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	}
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	return sb->drv->ops.umount(sb);
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}
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