From 12629d54e2facf919bc1702399de6cc87b5a46b6 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 30 Sep 2019 14:15:46 -0700 Subject: [PATCH] common/filter: add _filter_xfs_io_fiemap() Add _filter_xfs_io_fiemap() to clean up the output of 'xfs_io -c fiemap'. This will be used by a function in common/verity. Signed-off-by: Eric Biggers Reviewed-by: Eryu Guan Signed-off-by: Eryu Guan --- common/filter | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/common/filter b/common/filter index 26fc2132..2477f386 100644 --- a/common/filter +++ b/common/filter @@ -541,6 +541,30 @@ _filter_filefrag() $flags, "\n"' } +# Clean up the extents list output of 'xfs_io -c fiemap', e.g. +# +# file: +# 0: [0..79]: 628365312..628365391 +# 1: [80..159]: hole +# 2: [160..319]: 628365472..628365631 +# => +# 0 79 628365312 628365391 +# 160 319 628365472 628365631 +# +# The fields are: +# +# first_logical_block last_logical_block first_physical_block last_physical_block +# +# Blocks are 512 bytes, and holes are omitted. +# +_filter_xfs_io_fiemap() +{ + grep -E '^[[:space:]]+[0-9]+:' \ + | grep -v '\' \ + | sed -E 's/^[[:space:]]+[0-9]+://' \ + | tr '][.:' ' ' +} + # We generate WARNINGs on purpose when applications mix buffered/mmap IO with # direct IO on the same file. This is a helper for _check_dmesg() to filter out # such warnings. -- 2.30.2