Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 689 insertions, 0 deletions

diff --git a/tools/bpf/bpftool/Documentation/Makefile b/tools/bpf/bpftool/Documentation/Makefile
new file mode 100644
index 000000000..f7663a3e6
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/Makefile
@@ -0,0 +1,52 @@
+include ../../../scripts/Makefile.include
+include ../../../scripts/utilities.mak
+
+INSTALL ?= install
+RM ?= rm -f
+RMDIR ?= rmdir --ignore-fail-on-non-empty
+
+ifeq ($(V),1)
+  Q =
+else
+  Q = @
+endif
+
+prefix ?= /usr/local
+mandir ?= $(prefix)/man
+man8dir = $(mandir)/man8
+
+# Load targets for building eBPF helpers man page.
+include ../../Makefile.helpers
+
+MAN8_RST = $(filter-out $(HELPERS_RST),$(wildcard *.rst))
+
+_DOC_MAN8 = $(patsubst %.rst,%.8,$(MAN8_RST))
+DOC_MAN8 = $(addprefix $(OUTPUT),$(_DOC_MAN8))
+
+man: man8 helpers
+man8: $(DOC_MAN8)
+
+RST2MAN_DEP := $(shell command -v rst2man 2>/dev/null)
+
+$(OUTPUT)%.8: %.rst
+ifndef RST2MAN_DEP
+	$(error "rst2man not found, but required to generate man pages")
+endif
+	$(QUIET_GEN)rst2man $< > $@
+
+clean: helpers-clean
+	$(call QUIET_CLEAN, Documentation)
+	$(Q)$(RM) $(DOC_MAN8)
+
+install: man helpers-install
+	$(call QUIET_INSTALL, Documentation-man)
+	$(Q)$(INSTALL) -d -m 755 $(DESTDIR)$(man8dir)
+	$(Q)$(INSTALL) -m 644 $(DOC_MAN8) $(DESTDIR)$(man8dir)
+
+uninstall: helpers-uninstall
+	$(call QUIET_UNINST, Documentation-man)
+	$(Q)$(RM) $(addprefix $(DESTDIR)$(man8dir)/,$(_DOC_MAN8))
+	$(Q)$(RMDIR) $(DESTDIR)$(man8dir)
+
+.PHONY: man man8 clean install uninstall
+.DEFAULT_GOAL := man
diff --git a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
new file mode 100644
index 000000000..edbe81534
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
@@ -0,0 +1,140 @@
+================
+bpftool-cgroup
+================
+-------------------------------------------------------------------------------
+tool for inspection and simple manipulation of eBPF progs
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] **cgroup** *COMMAND*
+
+	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
+
+	*COMMANDS* :=
+	{ **show** | **list** | **tree** | **attach** | **detach** | **help** }
+
+MAP COMMANDS
+=============
+
+|	**bpftool** **cgroup { show | list }** *CGROUP*
+|	**bpftool** **cgroup tree** [*CGROUP_ROOT*]
+|	**bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
+|	**bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
+|	**bpftool** **cgroup help**
+|
+|	*PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
+|	*ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** |
+|		**bind4** | **bind6** | **post_bind4** | **post_bind6** | **connect4** | **connect6** |
+|               **sendmsg4** | **sendmsg6** }
+|	*ATTACH_FLAGS* := { **multi** | **override** }
+
+DESCRIPTION
+===========
+	**bpftool cgroup { show | list }** *CGROUP*
+		  List all programs attached to the cgroup *CGROUP*.
+
+		  Output will start with program ID followed by attach type,
+		  attach flags and program name.
+
+	**bpftool cgroup tree** [*CGROUP_ROOT*]
+		  Iterate over all cgroups in *CGROUP_ROOT* and list all
+		  attached programs. If *CGROUP_ROOT* is not specified,
+		  bpftool uses cgroup v2 mountpoint.
+
+		  The output is similar to the output of cgroup show/list
+		  commands: it starts with absolute cgroup path, followed by
+		  program ID, attach type, attach flags and program name.
+
+	**bpftool cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
+		  Attach program *PROG* to the cgroup *CGROUP* with attach type
+		  *ATTACH_TYPE* and optional *ATTACH_FLAGS*.
+
+		  *ATTACH_FLAGS* can be one of: **override** if a sub-cgroup installs
+		  some bpf program, the program in this cgroup yields to sub-cgroup
+		  program; **multi** if a sub-cgroup installs some bpf program,
+		  that cgroup program gets run in addition to the program in this
+		  cgroup.
+
+		  Only one program is allowed to be attached to a cgroup with
+		  no attach flags or the **override** flag. Attaching another
+		  program will release old program and attach the new one.
+
+		  Multiple programs are allowed to be attached to a cgroup with
+		  **multi**. They are executed in FIFO order (those that were
+		  attached first, run first).
+
+		  Non-default *ATTACH_FLAGS* are supported by kernel version 4.14
+		  and later.
+
+		  *ATTACH_TYPE* can be on of:
+		  **ingress** ingress path of the inet socket (since 4.10);
+		  **egress** egress path of the inet socket (since 4.10);
+		  **sock_create** opening of an inet socket (since 4.10);
+		  **sock_ops** various socket operations (since 4.12);
+		  **device** device access (since 4.15);
+		  **bind4** call to bind(2) for an inet4 socket (since 4.17);
+		  **bind6** call to bind(2) for an inet6 socket (since 4.17);
+		  **post_bind4** return from bind(2) for an inet4 socket (since 4.17);
+		  **post_bind6** return from bind(2) for an inet6 socket (since 4.17);
+		  **connect4** call to connect(2) for an inet4 socket (since 4.17);
+		  **connect6** call to connect(2) for an inet6 socket (since 4.17);
+		  **sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an
+		  unconnected udp4 socket (since 4.18);
+		  **sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an
+		  unconnected udp6 socket (since 4.18).
+
+	**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
+		  Detach *PROG* from the cgroup *CGROUP* and attach type
+		  *ATTACH_TYPE*.
+
+	**bpftool prog help**
+		  Print short help message.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short generic help message (similar to **bpftool help**).
+
+	-v, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+	-f, --bpffs
+		  Show file names of pinned programs.
+
+EXAMPLES
+========
+|
+| **# mount -t bpf none /sys/fs/bpf/**
+| **# mkdir /sys/fs/cgroup/test.slice**
+| **# bpftool prog load ./device_cgroup.o /sys/fs/bpf/prog**
+| **# bpftool cgroup attach /sys/fs/cgroup/test.slice/ device id 1 allow_multi**
+
+**# bpftool cgroup list /sys/fs/cgroup/test.slice/**
+
+::
+
+    ID       AttachType      AttachFlags     Name
+    1        device          allow_multi     bpf_prog1
+
+|
+| **# bpftool cgroup detach /sys/fs/cgroup/test.slice/ device id 1**
+| **# bpftool cgroup list /sys/fs/cgroup/test.slice/**
+
+::
+
+    ID       AttachType      AttachFlags     Name
+
+SEE ALSO
+========
+	**bpftool**\ (8), **bpftool-prog**\ (8), **bpftool-map**\ (8)
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
new file mode 100644
index 000000000..a6258bc8e
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -0,0 +1,161 @@
+================
+bpftool-map
+================
+-------------------------------------------------------------------------------
+tool for inspection and simple manipulation of eBPF maps
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] **map** *COMMAND*
+
+	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
+
+	*COMMANDS* :=
+	{ **show** | **list** | **dump** | **update** | **lookup** | **getnext** | **delete**
+	| **pin** | **help** }
+
+MAP COMMANDS
+=============
+
+|	**bpftool** **map { show | list }**   [*MAP*]
+|	**bpftool** **map dump**       *MAP*
+|	**bpftool** **map update**     *MAP*  **key** *DATA*   **value** *VALUE* [*UPDATE_FLAGS*]
+|	**bpftool** **map lookup**     *MAP*  **key** *DATA*
+|	**bpftool** **map getnext**    *MAP* [**key** *DATA*]
+|	**bpftool** **map delete**     *MAP*  **key** *DATA*
+|	**bpftool** **map pin**        *MAP*  *FILE*
+|	**bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*]
+|	**bpftool** **map help**
+|
+|	*MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
+|	*DATA* := { [**hex**] *BYTES* }
+|	*PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
+|	*VALUE* := { *DATA* | *MAP* | *PROG* }
+|	*UPDATE_FLAGS* := { **any** | **exist** | **noexist** }
+
+DESCRIPTION
+===========
+	**bpftool map { show | list }**   [*MAP*]
+		  Show information about loaded maps.  If *MAP* is specified
+		  show information only about given map, otherwise list all
+		  maps currently loaded on the system.
+
+		  Output will start with map ID followed by map type and
+		  zero or more named attributes (depending on kernel version).
+
+	**bpftool map dump**    *MAP*
+		  Dump all entries in a given *MAP*.
+
+	**bpftool map update**  *MAP*  **key** *DATA*   **value** *VALUE* [*UPDATE_FLAGS*]
+		  Update map entry for a given *KEY*.
+
+		  *UPDATE_FLAGS* can be one of: **any** update existing entry
+		  or add if doesn't exit; **exist** update only if entry already
+		  exists; **noexist** update only if entry doesn't exist.
+
+		  If the **hex** keyword is provided in front of the bytes
+		  sequence, the bytes are parsed as hexadeximal values, even if
+		  no "0x" prefix is added. If the keyword is not provided, then
+		  the bytes are parsed as decimal values, unless a "0x" prefix
+		  (for hexadecimal) or a "0" prefix (for octal) is provided.
+
+	**bpftool map lookup**  *MAP*  **key** *DATA*
+		  Lookup **key** in the map.
+
+	**bpftool map getnext** *MAP* [**key** *DATA*]
+		  Get next key.  If *key* is not specified, get first key.
+
+	**bpftool map delete**  *MAP*  **key** *DATA*
+		  Remove entry from the map.
+
+	**bpftool map pin**     *MAP*  *FILE*
+		  Pin map *MAP* as *FILE*.
+
+		  Note: *FILE* must be located in *bpffs* mount.
+
+	**bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*]
+		  Read events from a BPF_MAP_TYPE_PERF_EVENT_ARRAY map.
+
+		  Install perf rings into a perf event array map and dump
+		  output of any bpf_perf_event_output() call in the kernel.
+		  By default read the number of CPUs on the system and
+		  install perf ring for each CPU in the corresponding index
+		  in the array.
+
+		  If **cpu** and **index** are specified, install perf ring
+		  for given **cpu** at **index** in the array (single ring).
+
+		  Note that installing a perf ring into an array will silently
+		  replace any existing ring.  Any other application will stop
+		  receiving events if it installed its rings earlier.
+
+	**bpftool map help**
+		  Print short help message.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short generic help message (similar to **bpftool help**).
+
+	-v, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+	-f, --bpffs
+		  Show file names of pinned maps.
+
+EXAMPLES
+========
+**# bpftool map show**
+::
+
+  10: hash  name some_map  flags 0x0
+	key 4B  value 8B  max_entries 2048  memlock 167936B
+
+The following three commands are equivalent:
+
+|
+| **# bpftool map update id 10 key hex   20   c4   b7   00 value hex   0f   ff   ff   ab   01   02   03   4c**
+| **# bpftool map update id 10 key     0x20 0xc4 0xb7 0x00 value     0x0f 0xff 0xff 0xab 0x01 0x02 0x03 0x4c**
+| **# bpftool map update id 10 key       32  196  183    0 value       15  255  255  171    1    2    3   76**
+
+**# bpftool map lookup id 10 key 0 1 2 3**
+
+::
+
+  key: 00 01 02 03 value: 00 01 02 03 04 05 06 07
+
+
+**# bpftool map dump id 10**
+::
+
+  key: 00 01 02 03  value: 00 01 02 03 04 05 06 07
+  key: 0d 00 07 00  value: 02 00 00 00 01 02 03 04
+  Found 2 elements
+
+**# bpftool map getnext id 10 key 0 1 2 3**
+::
+
+  key:
+  00 01 02 03
+  next key:
+  0d 00 07 00
+
+|
+| **# mount -t bpf none /sys/fs/bpf/**
+| **# bpftool map pin id 10 /sys/fs/bpf/map**
+| **# bpftool map del pinned /sys/fs/bpf/map key 13 00 07 00**
+
+SEE ALSO
+========
+	**bpftool**\ (8), **bpftool-prog**\ (8), **bpftool-cgroup**\ (8)
diff --git a/tools/bpf/bpftool/Documentation/bpftool-perf.rst b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
new file mode 100644
index 000000000..e3eb0eab7
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
@@ -0,0 +1,81 @@
+================
+bpftool-perf
+================
+-------------------------------------------------------------------------------
+tool for inspection of perf related bpf prog attachments
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] **perf** *COMMAND*
+
+	*OPTIONS* := { [{ **-j** | **--json** }] [{ **-p** | **--pretty** }] }
+
+	*COMMANDS* :=
+	{ **show** | **list** | **help** }
+
+PERF COMMANDS
+=============
+
+|	**bpftool** **perf { show | list }**
+|	**bpftool** **perf help**
+
+DESCRIPTION
+===========
+	**bpftool perf { show | list }**
+		  List all raw_tracepoint, tracepoint, kprobe attachment in the system.
+
+		  Output will start with process id and file descriptor in that process,
+		  followed by bpf program id, attachment information, and attachment point.
+		  The attachment point for raw_tracepoint/tracepoint is the trace probe name.
+		  The attachment point for k[ret]probe is either symbol name and offset,
+		  or a kernel virtual address.
+		  The attachment point for u[ret]probe is the file name and the file offset.
+
+	**bpftool perf help**
+		  Print short help message.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short generic help message (similar to **bpftool help**).
+
+	-v, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+EXAMPLES
+========
+
+| **# bpftool perf**
+
+::
+
+      pid 21711  fd 5: prog_id 5  kprobe  func __x64_sys_write  offset 0
+      pid 21765  fd 5: prog_id 7  kretprobe  func __x64_sys_nanosleep  offset 0
+      pid 21767  fd 5: prog_id 8  tracepoint  sys_enter_nanosleep
+      pid 21800  fd 5: prog_id 9  uprobe  filename /home/yhs/a.out  offset 1159
+
+|
+| **# bpftool -j perf**
+
+::
+
+    [{"pid":21711,"fd":5,"prog_id":5,"fd_type":"kprobe","func":"__x64_sys_write","offset":0}, \
+     {"pid":21765,"fd":5,"prog_id":7,"fd_type":"kretprobe","func":"__x64_sys_nanosleep","offset":0}, \
+     {"pid":21767,"fd":5,"prog_id":8,"fd_type":"tracepoint","tracepoint":"sys_enter_nanosleep"}, \
+     {"pid":21800,"fd":5,"prog_id":9,"fd_type":"uprobe","filename":"/home/yhs/a.out","offset":1159}]
+
+
+SEE ALSO
+========
+	**bpftool**\ (8), **bpftool-prog**\ (8), **bpftool-map**\ (8)
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
new file mode 100644
index 000000000..64156a16d
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -0,0 +1,194 @@
+================
+bpftool-prog
+================
+-------------------------------------------------------------------------------
+tool for inspection and simple manipulation of eBPF progs
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] **prog** *COMMAND*
+
+	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
+
+	*COMMANDS* :=
+	{ **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** | **help** }
+
+MAP COMMANDS
+=============
+
+|	**bpftool** **prog { show | list }** [*PROG*]
+|	**bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}]
+|	**bpftool** **prog dump jited**  *PROG* [{**file** *FILE* | **opcodes**}]
+|	**bpftool** **prog pin** *PROG* *FILE*
+|	**bpftool** **prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
+|	**bpftool** **prog help**
+|
+|	*MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
+|	*PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
+|	*TYPE* := {
+|		**socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
+|		**tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
+|		**cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
+|		**lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
+|		**cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
+|		**cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
+|	}
+
+
+DESCRIPTION
+===========
+	**bpftool prog { show | list }** [*PROG*]
+		  Show information about loaded programs.  If *PROG* is
+		  specified show information only about given program, otherwise
+		  list all programs currently loaded on the system.
+
+		  Output will start with program ID followed by program type and
+		  zero or more named attributes (depending on kernel version).
+
+	**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }]
+		  Dump eBPF instructions of the program from the kernel. By
+		  default, eBPF will be disassembled and printed to standard
+		  output in human-readable format. In this case, **opcodes**
+		  controls if raw opcodes should be printed as well.
+
+		  If **file** is specified, the binary image will instead be
+		  written to *FILE*.
+
+		  If **visual** is specified, control flow graph (CFG) will be
+		  built instead, and eBPF instructions will be presented with
+		  CFG in DOT format, on standard output.
+
+	**bpftool prog dump jited**  *PROG* [{ **file** *FILE* | **opcodes** }]
+		  Dump jited image (host machine code) of the program.
+		  If *FILE* is specified image will be written to a file,
+		  otherwise it will be disassembled and printed to stdout.
+
+		  **opcodes** controls if raw opcodes will be printed.
+
+	**bpftool prog pin** *PROG* *FILE*
+		  Pin program *PROG* as *FILE*.
+
+		  Note: *FILE* must be located in *bpffs* mount.
+
+	**bpftool prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
+		  Load bpf program from binary *OBJ* and pin as *FILE*.
+		  **type** is optional, if not specified program type will be
+		  inferred from section names.
+		  By default bpftool will create new maps as declared in the ELF
+		  object being loaded.  **map** parameter allows for the reuse
+		  of existing maps.  It can be specified multiple times, each
+		  time for a different map.  *IDX* refers to index of the map
+		  to be replaced in the ELF file counting from 0, while *NAME*
+		  allows to replace a map by name.  *MAP* specifies the map to
+		  use, referring to it by **id** or through a **pinned** file.
+		  If **dev** *NAME* is specified program will be loaded onto
+		  given networking device (offload).
+
+		  Note: *FILE* must be located in *bpffs* mount.
+
+	**bpftool prog help**
+		  Print short help message.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short generic help message (similar to **bpftool help**).
+
+	-v, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+	-f, --bpffs
+		  Show file names of pinned programs.
+
+EXAMPLES
+========
+**# bpftool prog show**
+::
+
+  10: xdp  name some_prog  tag 005a3d2123620c8b  gpl
+	loaded_at Sep 29/20:11  uid 0
+	xlated 528B  jited 370B  memlock 4096B  map_ids 10
+
+**# bpftool --json --pretty prog show**
+
+::
+
+    {
+        "programs": [{
+                "id": 10,
+                "type": "xdp",
+                "tag": "005a3d2123620c8b",
+                "gpl_compatible": true,
+                "loaded_at": "Sep 29/20:11",
+                "uid": 0,
+                "bytes_xlated": 528,
+                "jited": true,
+                "bytes_jited": 370,
+                "bytes_memlock": 4096,
+                "map_ids": [10
+                ]
+            }
+        ]
+    }
+
+|
+| **# bpftool prog dump xlated id 10 file /tmp/t**
+| **# ls -l /tmp/t**
+|   -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
+
+**# bpftool prog dum jited tag 005a3d2123620c8b**
+
+::
+
+    push   %rbp
+    mov    %rsp,%rbp
+    sub    $0x228,%rsp
+    sub    $0x28,%rbp
+    mov    %rbx,0x0(%rbp)
+
+|
+| **# mount -t bpf none /sys/fs/bpf/**
+| **# bpftool prog pin id 10 /sys/fs/bpf/prog**
+| **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
+| **# ls -l /sys/fs/bpf/**
+|   -rw------- 1 root root 0 Jul 22 01:43 prog
+|   -rw------- 1 root root 0 Jul 22 01:44 prog2
+
+**# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes**
+
+::
+
+    push   %rbp
+    55
+    mov    %rsp,%rbp
+    48 89 e5
+    sub    $0x228,%rsp
+    48 81 ec 28 02 00 00
+    sub    $0x28,%rbp
+    48 83 ed 28
+    mov    %rbx,0x0(%rbp)
+    48 89 5d 00
+
+|
+| **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
+| **# bpftool prog show pinned /sys/fs/bpf/xdp1**
+|   9: xdp  name xdp_prog1  tag 539ec6ce11b52f98  gpl
+|	loaded_at 2018-06-25T16:17:31-0700  uid 0
+|	xlated 488B  jited 336B  memlock 4096B  map_ids 7
+| **# rm /sys/fs/bpf/xdp1**
+|
+
+SEE ALSO
+========
+	**bpftool**\ (8), **bpftool-map**\ (8), **bpftool-cgroup**\ (8)
diff --git a/tools/bpf/bpftool/Documentation/bpftool.rst b/tools/bpf/bpftool/Documentation/bpftool.rst
new file mode 100644
index 000000000..b6f5d5604
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool.rst
@@ -0,0 +1,61 @@
+================
+BPFTOOL
+================
+-------------------------------------------------------------------------------
+tool for inspection and simple manipulation of eBPF programs and maps
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] *OBJECT* { *COMMAND* | **help** }
+
+	**bpftool** **batch file** *FILE*
+
+	**bpftool** **version**
+
+	*OBJECT* := { **map** | **program** | **cgroup** | **perf** }
+
+	*OPTIONS* := { { **-V** | **--version** } | { **-h** | **--help** }
+	| { **-j** | **--json** } [{ **-p** | **--pretty** }] }
+
+	*MAP-COMMANDS* :=
+	{ **show** | **list** | **dump** | **update** | **lookup** | **getnext** | **delete**
+	| **pin** | **event_pipe** | **help** }
+
+	*PROG-COMMANDS* := { **show** | **list** | **dump jited** | **dump xlated** | **pin**
+	| **load** | **help** }
+
+	*CGROUP-COMMANDS* := { **show** | **list** | **attach** | **detach** | **help** }
+
+	*PERF-COMMANDS* := { **show** | **list** | **help** }
+
+DESCRIPTION
+===========
+	*bpftool* allows for inspection and simple modification of BPF objects
+	on the system.
+
+	Note that format of the output of all tools is not guaranteed to be
+	stable and should not be depended upon.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short help message (similar to **bpftool help**).
+
+	-v, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+SEE ALSO
+========
+	**bpftool-map**\ (8), **bpftool-prog**\ (8), **bpftool-cgroup**\ (8)
+        **bpftool-perf**\ (8)