Add to tune2fs the ability to recalculate extent tree checksums when altering
the metadata checksum feature flag.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
misc/tune2fs.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index a5ff5ce..784df9a 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -376,6 +376,48 @@ static void request_fsck_afterwards(ext2_filsys fs)
printf(_("(and reboot afterwards!)\n"));
}
+/* Rewrite extents */
+static errcode_t rewrite_extents(ext2_filsys fs, ext2_ino_t ino,
+ struct ext2_inode *inode)
+{
+ ext2_extent_handle_t handle;
+ struct ext2fs_extent extent;
+ int op = EXT2_EXTENT_ROOT;
+ errcode_t errcode;
+
+ if (!(inode->i_flags & EXT4_EXTENTS_FL))
+ return 0;
+
+ errcode = ext2fs_extent_open(fs, ino, &handle);
+ if (errcode)
+ return errcode;
+
+ while (1) {
+ errcode = ext2fs_extent_get(handle, op, &extent);
+ if (errcode)
+ break;
+
+ /* Root node is in the separately checksummed inode */
+ if (op == EXT2_EXTENT_ROOT) {
+ op = EXT2_EXTENT_NEXT;
+ continue;
+ }
+ op = EXT2_EXTENT_NEXT;
+
+ /* Only visit the first extent in each extent block */
+ if (extent.e_flags & EXT2_EXTENT_FLAGS_SECOND_VISIT)
+ continue;
+ errcode = ext2fs_extent_replace(handle, 0, &extent);
+ if (errcode)
+ break;
+ }
+
+ /* Ok if we run off the end */
+ if (errcode == EXT2_ET_EXTENT_NO_NEXT)
+ errcode = 0;
+ return errcode;
+}
+
/*
* Forcibly set checksums in all inodes.
*/
@@ -416,6 +458,13 @@ static void rewrite_inodes(ext2_filsys fs)
com_err("set_csum", retval, "while writing inode");
exit(1);
}
+
+ retval = rewrite_extents(fs, ino, inode);
+ if (retval) {
+ com_err("rewrite_extents", retval,
+ "while rewriting extents");
+ exit(1);
+ }
} while (ino);
ext2fs_free_mem(&inode);
--
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