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 <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <string.h>
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#include <lib/libds/dlist.h>
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#include <vfs/core.h>
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void vfs_mount_point_get_first_bind(const struct inode *mount_point,
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    struct inode *lookup) {
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	memcpy(lookup, mount_point, sizeof(struct inode));
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	while (vfs_mount_point_get_prev_bind(lookup, lookup)) {}
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}
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void vfs_mount_point_get_first(const struct inode *mount_point,
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    struct inode *lookup) {
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	memcpy(lookup, mount_point, sizeof(struct inode));
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	while (vfs_mount_point_get_prev(lookup, lookup)) {}
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}
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void vfs_mount_point_get_last(const struct inode *mount_point,
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    struct inode *lookup) {
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	memcpy(lookup, mount_point, sizeof(struct inode));
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	while (vfs_mount_point_get_next(lookup, lookup)) {}
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}
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bool vfs_mount_point_get_next(const struct inode *mount_point,
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    struct inode *lookup) {
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	struct super_block *sb;
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	assert(!vfs_inode_is_bad(mount_point));
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	dlist_foreach_entry(sb, &mount_point->sb->mount_list, list_item) {
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		if (mount_point->ino == sb->mount_point.ino) {
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			lookup->ino = VFS_MPT_INO;
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			lookup->sb = sb;
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			return true;
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		}
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	}
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	return false;
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}
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bool vfs_mount_point_get_prev(const struct inode *mount_point,
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    struct inode *lookup) {
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	assert(!vfs_inode_is_bad(mount_point));
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	if (!vfs_inode_is_mount_point(mount_point)
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	    || vfs_inode_is_root(mount_point)) {
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		return false;
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	}
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	memcpy(lookup, &mount_point->sb->mount_point, sizeof(struct inode));
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	return true;
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}
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bool vfs_mount_point_get_prev_bind(const struct inode *mount_point,
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    struct inode *lookup) {
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	assert(!vfs_inode_is_bad(mount_point));
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	if (!mount_point->sb->bind_mount) {
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		return false;
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	}
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	return vfs_mount_point_get_prev(mount_point, lookup);
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}
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void vfs_mount_point_add_next(const struct inode *mount_point,
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    struct super_block *sb) {
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	struct inode mpt;
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	vfs_mount_point_get_last(mount_point, &mpt);
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	dlist_add_next(&sb->list_item, &mpt.sb->mount_list);
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	memcpy(&sb->mount_point, &mpt, sizeof(struct inode));
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}
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