22 static int kernfs_sop_remount_fs(struct super_block *sb, int *flags, char *data)  in kernfs_sop_remount_fs()  argument
24 	struct kernfs_root *root = kernfs_info(sb)->root;  in kernfs_sop_remount_fs()
58 struct kernfs_root *kernfs_root_from_sb(struct super_block *sb)  in kernfs_root_from_sb()  argument
60 	if (sb->s_op == &kernfs_sops)  in kernfs_root_from_sb()
61 		return kernfs_info(sb)->root;  in kernfs_root_from_sb()
65 static int kernfs_fill_super(struct super_block *sb, unsigned long magic)  in kernfs_fill_super()  argument
67 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_fill_super()
71 	info->sb = sb;  in kernfs_fill_super()
72 	sb->s_blocksize = PAGE_CACHE_SIZE;  in kernfs_fill_super()
73 	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;  in kernfs_fill_super()
74 	sb->s_magic = magic;  in kernfs_fill_super()
75 	sb->s_op = &kernfs_sops;  in kernfs_fill_super()
76 	sb->s_time_gran = 1;  in kernfs_fill_super()
80 	inode = kernfs_get_inode(sb, info->root->kn);  in kernfs_fill_super()
95 	sb->s_root = root;  in kernfs_fill_super()
96 	sb->s_d_op = &kernfs_dops;  in kernfs_fill_super()
100 static int kernfs_test_super(struct super_block *sb, void *data)  in kernfs_test_super()  argument
102 	struct kernfs_super_info *sb_info = kernfs_info(sb);  in kernfs_test_super()
108 static int kernfs_set_super(struct super_block *sb, void *data)  in kernfs_set_super()  argument
111 	error = set_anon_super(sb, data);  in kernfs_set_super()
113 		sb->s_fs_info = data;  in kernfs_set_super()
123 const void *kernfs_super_ns(struct super_block *sb)  in kernfs_super_ns()  argument
125 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_super_ns()
150 	struct super_block *sb;  in kernfs_mount_ns()  local
161 	sb = sget(fs_type, kernfs_test_super, kernfs_set_super, flags, info);  in kernfs_mount_ns()
162 	if (IS_ERR(sb) || sb->s_fs_info != info)  in kernfs_mount_ns()
164 	if (IS_ERR(sb))  in kernfs_mount_ns()
165 		return ERR_CAST(sb);  in kernfs_mount_ns()
168 		*new_sb_created = !sb->s_root;  in kernfs_mount_ns()
170 	if (!sb->s_root) {  in kernfs_mount_ns()
171 		struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_mount_ns()
173 		error = kernfs_fill_super(sb, magic);  in kernfs_mount_ns()
175 			deactivate_locked_super(sb);  in kernfs_mount_ns()
178 		sb->s_flags |= MS_ACTIVE;  in kernfs_mount_ns()
185 	return dget(sb->s_root);  in kernfs_mount_ns()
196 void kernfs_kill_sb(struct super_block *sb)  in kernfs_kill_sb()  argument
198 	struct kernfs_super_info *info = kernfs_info(sb);  in kernfs_kill_sb()
199 	struct kernfs_node *root_kn = sb->s_root->d_fsdata;  in kernfs_kill_sb()
209 	kill_anon_super(sb);  in kernfs_kill_sb()
229 	struct super_block *sb = NULL;  in kernfs_pin_sb()  local
234 			sb = info->sb;  in kernfs_pin_sb()
235 			if (!atomic_inc_not_zero(&info->sb->s_active))  in kernfs_pin_sb()
236 				sb = ERR_PTR(-EINVAL);  in kernfs_pin_sb()
241 	return sb;  in kernfs_pin_sb()