If someone is debugging a badly damaged filesystem, it might be useful to
disable the checksum verifications that will otherwise prevent the filesystem
from loading.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
debugfs/debugfs.8.in | 7 ++++++-
debugfs/debugfs.c | 5 ++++-
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in
index fe07f34..b5d208f 100644
--- a/debugfs/debugfs.8.in
+++ b/debugfs/debugfs.8.in
@@ -8,7 +8,7 @@ debugfs \- ext2/ext3/ext4 file system debugger
.SH SYNOPSIS
.B debugfs
[
-.B \-DVwci
+.B \-DVwcin
]
[
.B \-b
@@ -48,6 +48,11 @@ file system (e.g /dev/hdXX).
Specifies that the file system should be opened in read-write mode.
Without this option, the file system is opened in read-only mode.
.TP
+.I \-n
+Disables metadata checksum verification. This should only be used if
+you believe the metadata to be correct despite the complaints of
+e2fsprogs.
+.TP
.I \-c
Specifies that the file system should be opened in catastrophic mode, in
which the inode and group bitmaps are not read initially. This can be
diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index dd1435b..32a5864 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -2269,7 +2269,7 @@ int main(int argc, char **argv)
fprintf (stderr, "%s %s (%s)\n", debug_prog_name,
E2FSPROGS_VERSION, E2FSPROGS_DATE);
- while ((c = getopt (argc, argv, "iwcR:f:b:s:Vd:D")) != EOF) {
+ while ((c = getopt(argc, argv, "niwcR:f:b:s:Vd:D")) != EOF) {
switch (c) {
case 'R':
request = optarg;
@@ -2283,6 +2283,9 @@ int main(int argc, char **argv)
case 'i':
open_flags |= EXT2_FLAG_IMAGE_FILE;
break;
+ case 'n':
+ open_flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+ break;
case 'w':
open_flags |= EXT2_FLAG_RW;
break;
--
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