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da489dd)
What little docs there were had a cut & paste error.
We can do better. :)
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
request do_extent_open, "Open inode for extent manipulation",
extent_open, eo;
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.",
-request do_dump_block, "Zap block",
+request do_dump_block, "Dump contents of a block",
in the inode
.IR filespec .
.TP
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
.I cat filespec
Dump the contents of the inode
.I filespec
and copy the contents of
.I source_file
into the destination file.
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
.SH ENVIRONMENT VARIABLES
.TP
.B DEBUGFS_PAGER, PAGER