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 | 7 +++++-- 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in index 08d9068..157c667 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 04d5139..4ff23ef 100644 --- a/debugfs/debugfs.c +++ b/debugfs/debugfs.c @@ -2271,9 +2271,9 @@ int main(int argc, char **argv) int catastrophic = 0; char *data_filename = 0; #ifdef READ_ONLY - const char *opt_string = "icR:f:b:s:Vd:D"; + const char *opt_string = "nicR:f:b:s:Vd:D"; #else - const char *opt_string = "iwcR:f:b:s:Vd:D"; + const char *opt_string = "niwcR:f:b:s:Vd:D"; #endif if (debug_prog_name == 0) @@ -2300,6 +2300,9 @@ 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; #ifndef READ_ONLY case 'w': open_flags |= EXT2_FLAG_RW; -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
