bpftool/docs: add description of btf dump C option

Document optional **c** option for btf dump subcommand.

Cc: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/bpf/bpftool/Documentation/bpftool-btf.rst b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
index 2dbc141..3daed9e 100644 (file)
--- a/tools/bpf/bpftool/Documentation/bpftool-btf.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
@@ -19,10 +19,11 @@ SYNOPSIS
 BTF COMMANDS
 =============
 
-|      **bpftool** **btf dump** *BTF_SRC*
+|      **bpftool** **btf dump** *BTF_SRC* [**format** *FORMAT*]
 |      **bpftool** **btf help**
 |
 |      *BTF_SRC* := { **id** *BTF_ID* | **prog** *PROG* | **map** *MAP* [{**key** | **value** | **kv** | **all**}] | **file** *FILE* }
+|      *FORMAT* := { **raw** | **c** }
 |      *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
 |      *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
 
@@ -31,23 +32,27 @@ DESCRIPTION
        **bpftool btf dump** *BTF_SRC*
                  Dump BTF entries from a given *BTF_SRC*.
 
-                  When **id** is specified, BTF object with that ID will be
-                  loaded and all its BTF types emitted.
+                 When **id** is specified, BTF object with that ID will be
+                 loaded and all its BTF types emitted.
 
-                  When **map** is provided, it's expected that map has
-                  associated BTF object with BTF types describing key and
-                  value. It's possible to select whether to dump only BTF
-                  type(s) associated with key (**key**), value (**value**),
-                  both key and value (**kv**), or all BTF types present in
-                  associated BTF object (**all**). If not specified, **kv**
-                  is assumed.
+                 When **map** is provided, it's expected that map has
+                 associated BTF object with BTF types describing key and
+                 value. It's possible to select whether to dump only BTF
+                 type(s) associated with key (**key**), value (**value**),
+                 both key and value (**kv**), or all BTF types present in
+                 associated BTF object (**all**). If not specified, **kv**
+                 is assumed.
 
-                  When **prog** is provided, it's expected that program has
-                  associated BTF object with BTF types.
+                 When **prog** is provided, it's expected that program has
+                 associated BTF object with BTF types.
 
-                  When specifying *FILE*, an ELF file is expected, containing
-                  .BTF section with well-defined BTF binary format data,
-                  typically produced by clang or pahole.
+                 When specifying *FILE*, an ELF file is expected, containing
+                 .BTF section with well-defined BTF binary format data,
+                 typically produced by clang or pahole.
+
+                 **format** option can be used to override default (raw)
+                 output format. Raw (**raw**) or C-syntax (**c**) output
+                 formats are supported.
 
        **bpftool btf help**
                  Print short help message.