From 85a24385b6702ca207165a18bc08fb92f5e6c986 Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Fri, 11 Jan 2013 07:40:25 +0000 Subject: [PATCH 1/1] debugfs: document zap_block & block_dump What little docs there were had a cut & paste error. We can do better. :) Signed-off-by: Eric Sandeen Signed-off-by: Theodore Ts'o --- debugfs/debug_cmds.ct | 4 ++-- debugfs/debugfs.8.in | 12 ++++++++++++ 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/debugfs/debug_cmds.ct b/debugfs/debug_cmds.ct index 520933a..9a05ef7 100644 --- a/debugfs/debug_cmds.ct +++ b/debugfs/debug_cmds.ct @@ -181,10 +181,10 @@ request do_set_mmp_value, "Set MMP value", request do_extent_open, "Open inode for extent manipulation", extent_open, eo; -request do_zap_block, "Zap block", +request do_zap_block, "Zap block: fill with 0, pattern, flip bits etc.", zap_block, zap; -request do_dump_block, "Zap block", +request do_dump_block, "Dump contents of a block", block_dump, bp; end; diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in index ea3375e..bf93622 100644 --- a/debugfs/debugfs.8.in +++ b/debugfs/debugfs.8.in @@ -168,6 +168,10 @@ Print the physical block number corresponding to the logical block number in the inode .IR filespec . .TP +.I block_dump [-f out_file] block_num +Dump the contents of a block, optionally to +.IR out_file . +.TP .I cat filespec Dump the contents of the inode .I filespec @@ -604,6 +608,14 @@ Create a file in the filesystem named and copy the contents of .I source_file into the destination file. +.TP +.I zap_block [-f file] [-o offset] [-l length] [-p pattern] block_num +Zero, or pattern-fill, portions of a block within a file or +within the filesystem. +.TP +.I zap_block [-f file] [-b bit] block_num +Bit-flip portions of a block within a file or +within the filesystem. .SH ENVIRONMENT VARIABLES .TP .B DEBUGFS_PAGER, PAGER -- 1.8.3.1