On 24.05.22 г. 10:18 ч., Christoph Hellwig wrote:
Add a few helpers to consolidate code for btrfs read repair testing:
- _btrfs_get_first_logical() gets the btrfs logical address for the
first extent in a file
- _btrfs_get_device_path and _btrfs_get_physical use the
btrfs-map-logical tool to find the device path and physical address
for btrfs logical address for a specific mirror
- _btrfs_direct_read_on_mirror and _btrfs_buffered_read_on_mirror
read the data from a specific mirror
These will be used to consolidate the read repair tests and avoid
duplication for new tests.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
common/btrfs | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
common/config | 1 +
2 files changed, 76 insertions(+)
diff --git a/common/btrfs b/common/btrfs
index ac597ca4..129a83f7 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -505,3 +505,78 @@ _btrfs_metadump()
$BTRFS_IMAGE_PROG "$device" "$dumpfile"
[ -n "$DUMP_COMPRESSOR" ] && $DUMP_COMPRESSOR -f "$dumpfile" &> /dev/null
}
+
+# Return the btrfs logical address for the first block in a file
+_btrfs_get_first_logical()
+{
+ local file=$1
+ _require_command "$FILEFRAG_PROG" filefrag
+
+ ${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
Likely you want to print the logical layout of the file for reference
purposes? Then use $file instead of $SCRATCH_MNT/foobar
<snip>
