btrfs-progs/tests/fsck-tests/042-half-dropped-inode/test.sh

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#!/bin/bash
# To check if btrfs check can handle half dropped inodes.
# Such inodes are orphan inodes going through file items evicting.
# During that evicting, btrfs won't bother updating the nbytes of the orphan
# inode as they will soon be removed completely.
#
# Btrfs check should be able to recognize such inodes without giving false
# alerts
#
# The way to reproduce the image:
# - Create a lot of regular file extents for one inode
# Using direct IO with small block size is the easy method
# - Modify kernel to commit transaction more aggressively
# Two locations are needed:
# * btrfs_unlink():
# To make the ORPHAN item reach disk asap
# * btrfs_evict_inode():
# Make the btrfs_end_transaction() call after btrfs_trncate_inode_items()
# to commit transaction, so we can catch every file item deletion
# - Setup dm-log-writes
# To catch every transaction commit
# - Delete the inode
# - Sync the fs
# - Replay the log
source "$TEST_TOP/common"
check_prereq btrfs
check_image() {
run_check "$TOP/btrfs" check "$1"
}
check_all_images