ext4: flush the extent status cache during EXT4_IOC_SWAP_BOOT (cde2d7a7) · Commits · 戴 / test

Previously we weren't swapping only some of the extent_status LRU fields during the processing of the EXT4_IOC_SWAP_BOOT ioctl. The much safer thing to do is to just completely flush the extent status tree when doing the swap. Signed-off-by:

"Theodore Ts'o" <tytso@mit.edu> Cc: Zheng Liu <gnehzuil.liu@gmail.com> Cc: stable@vger.kernel.org

fs/ext4/ioctl.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -77,8 +77,10 @@ static void swap_inode_data(struct inode inode1, struct inode inode2)
		memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
		memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags));
		memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize));
		memswap(&ei1->i_es_tree, &ei2->i_es_tree, sizeof(ei1->i_es_tree));
		memswap(&ei1->i_es_lru_nr, &ei2->i_es_lru_nr, sizeof(ei1->i_es_lru_nr));
		ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
		ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
		ext4_es_lru_del(inode1);
		ext4_es_lru_del(inode2);

		isize = i_size_read(inode1);
		i_size_write(inode1, i_size_read(inode2));

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