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bpftool: Remove useless emphasis on command description in man pages

Browse source 
As it turns out, the terms in definition lists in the rST file are
already rendered with bold-ish formatting when generating the man pages;
all double-star sequences we have in the commands for the command
description are unnecessary, and can be removed to make the
documentation easier to read.

The rST files were automatically processed with:

    sed -i '/DESCRIPTION/,/OPTIONS/ { /^\*/ s/\*\*//g }' b*.rst

Signed-off-by: Rameez Rehman <rameezrehman408@hotmail.com>
Signed-off-by: Quentin Monnet <qmo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240331200346.29118-3-qmo@kernel.org
This commit is contained in:
Rameez Rehman 2024-03-31 21:03:45 +01:00 committed by Daniel Borkmann
parent f7b6854364
commit ea379b3ccc
11 changed files with 61 additions and 61 deletions
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6
tools/bpf/bpftool/Documentation/bpftool-btf.rst
View file

@ -34,7 +34,7 @@ BTF COMMANDS
DESCRIPTION
===========
**bpftool btf { show | list }** [**id** *BTF_ID*]
bpftool btf { show | list } [id *BTF_ID*]
Show information about loaded BTF objects. If a BTF ID is specified, show
information only about given BTF object, otherwise list all BTF objects
currently loaded on the system.
@ -43,7 +43,7 @@ DESCRIPTION
that hold open file descriptors (FDs) against BTF objects. On such kernels
bpftool will automatically emit this information as well.
**bpftool btf dump** *BTF_SRC*
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
@ -65,7 +65,7 @@ DESCRIPTION
**format** option can be used to override default (raw) output format. Raw
(**raw**) or C-syntax (**c**) output formats are supported.
**bpftool btf help**
bpftool btf help
Print short help message.
OPTIONS

10
tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
View file

@ -49,7 +49,7 @@ CGROUP COMMANDS
DESCRIPTION
===========
**bpftool cgroup { show | list }** *CGROUP* [**effective**]
bpftool cgroup { show | list } *CGROUP* [effective]
List all programs attached to the cgroup *CGROUP*.
Output will start with program ID followed by attach type, attach flags and
@ -59,7 +59,7 @@ DESCRIPTION
for events within a cgroup. This includes inherited along with attached
ones.
**bpftool cgroup tree** [*CGROUP_ROOT*] [**effective**]
bpftool cgroup tree [*CGROUP_ROOT*] [effective]
Iterate over all cgroups in *CGROUP_ROOT* and list all attached programs.
If *CGROUP_ROOT* is not specified, bpftool uses cgroup v2 mountpoint.
@ -71,7 +71,7 @@ DESCRIPTION
for events within a cgroup. This includes inherited along with attached
ones.
**bpftool cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
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*.
@ -126,10 +126,10 @@ DESCRIPTION
**getsockname_unix** call to getsockname(2) for a unix socket (since 6.7);
**sock_release** closing an userspace inet socket (since 5.9).
**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
bpftool cgroup detach *CGROUP* *ATTACH_TYPE* *PROG*
Detach *PROG* from the cgroup *CGROUP* and attach type *ATTACH_TYPE*.
**bpftool prog help**
bpftool prog help
Print short help message.
OPTIONS

8
tools/bpf/bpftool/Documentation/bpftool-feature.rst
View file

@ -32,7 +32,7 @@ FEATURE COMMANDS
DESCRIPTION
===========
**bpftool feature probe** [**kernel**] [**full**] [**macros** [**prefix** *PREFIX*]]
bpftool feature probe [kernel] [full] [macros [prefix *PREFIX*]]
Probe the running kernel and dump a number of eBPF-related parameters, such
as availability of the **bpf**\ () system call, JIT status, eBPF program
types availability, eBPF helper functions availability, and more.
@ -59,14 +59,14 @@ DESCRIPTION
bpftool is inadvertently run as non-root, for example. This keyword is
unavailable if bpftool was compiled without libcap.
**bpftool feature probe dev** *NAME* [**full**] [**macros** [**prefix** *PREFIX*]]
bpftool feature probe dev *NAME* [full] [macros [prefix *PREFIX*]]
Probe network device for supported eBPF features and dump results to the
console.
The keywords **full**, **macros** and **prefix** have the same role as when
probing the kernel.
**bpftool feature list_builtins** *GROUP*
bpftool feature list_builtins *GROUP*
List items known to bpftool. These can be BPF program types
(**prog_types**), BPF map types (**map_types**), attach types
(**attach_types**), link types (**link_types**), or BPF helper functions
@ -75,7 +75,7 @@ DESCRIPTION
(for all object types) or from the BPF UAPI header (list of helpers). This
can be used in scripts to iterate over BPF types or helpers.
**bpftool feature help**
bpftool feature help
Print short help message.
OPTIONS

10
tools/bpf/bpftool/Documentation/bpftool-gen.rst
View file

@ -31,7 +31,7 @@ GEN COMMANDS
DESCRIPTION
===========
**bpftool gen object** *OUTPUT_FILE* *INPUT_FILE* [*INPUT_FILE*...]
bpftool gen object *OUTPUT_FILE* *INPUT_FILE* [*INPUT_FILE*...]
Statically link (combine) together one or more *INPUT_FILE*'s into a single
resulting *OUTPUT_FILE*. All the files involved are BPF ELF object files.
@ -48,7 +48,7 @@ DESCRIPTION
command) or passed directly into **libbpf** (using **bpf_object__open()**
family of APIs).
**bpftool gen skeleton** *FILE*
bpftool gen skeleton *FILE*
Generate BPF skeleton C header file for a given *FILE*.
BPF skeleton is an alternative interface to existing libbpf APIs for
@ -132,7 +132,7 @@ DESCRIPTION
used to fetch and update (non-read-only) data from userspace, with same
simplicity as for BPF side.
**bpftool gen subskeleton** *FILE*
bpftool gen subskeleton *FILE*
Generate BPF subskeleton C header file for a given *FILE*.
Subskeletons are similar to skeletons, except they do not own the
@ -154,7 +154,7 @@ DESCRIPTION
Frees the storage for the subskeleton but *does not* unload any BPF
programs or maps.
**bpftool** **gen min_core_btf** *INPUT* *OUTPUT* *OBJECT* [*OBJECT*...]
bpftool gen min_core_btf *INPUT* *OUTPUT* *OBJECT* [*OBJECT*...]
Generate a minimum BTF file as *OUTPUT*, derived from a given *INPUT* BTF
file, containing all needed BTF types so one, or more, given eBPF objects
CO-RE relocations may be satisfied.
@ -174,7 +174,7 @@ DESCRIPTION
Check examples bellow for more information how to use it.
**bpftool gen help**
bpftool gen help
Print short help message.
OPTIONS

4
tools/bpf/bpftool/Documentation/bpftool-iter.rst
View file

@ -31,7 +31,7 @@ ITER COMMANDS
DESCRIPTION
===========
**bpftool iter pin** *OBJ* *PATH* [**map** *MAP*]
bpftool iter pin *OBJ* *PATH* [map *MAP*]
A bpf iterator combines a kernel iterating of particular kernel data (e.g.,
tasks, bpf_maps, etc.) and a bpf program called for each kernel data object
(e.g., one task, one bpf_map, etc.). User space can *read* kernel iterator
@ -48,7 +48,7 @@ DESCRIPTION
User can then *cat PATH* to see the bpf iterator output.
**bpftool iter help**
bpftool iter help
Print short help message.
OPTIONS

8
tools/bpf/bpftool/Documentation/bpftool-link.rst
View file

@ -33,7 +33,7 @@ LINK COMMANDS
DESCRIPTION
===========
**bpftool link { show | list }** [*LINK*]
bpftool link { show | list } [*LINK*]
Show information about active links. If *LINK* is specified show
information only about given link, otherwise list all links currently
active on the system.
@ -45,19 +45,19 @@ DESCRIPTION
that hold open file descriptors (FDs) against BPF links. On such kernels
bpftool will automatically emit this information as well.
**bpftool link pin** *LINK* *FILE*
bpftool link pin *LINK* *FILE*
Pin link *LINK* as *FILE*.
Note: *FILE* must be located in *bpffs* mount. It must not contain a dot
character ('.'), which is reserved for future extensions of *bpffs*.
**bpftool link detach** *LINK*
bpftool link detach *LINK*
Force-detach link *LINK*. BPF link and its underlying BPF program will stay
valid, but they will be detached from the respective BPF hook and BPF link
will transition into a defunct state until last open file descriptor for
that link is closed.
**bpftool link help**
bpftool link help
Print short help message.
OPTIONS

32
tools/bpf/bpftool/Documentation/bpftool-map.rst
View file

@ -59,7 +59,7 @@ MAP COMMANDS
DESCRIPTION
===========
**bpftool map { show | list }** [*MAP*]
bpftool map { show | list } [*MAP*]
Show information about loaded maps. If *MAP* is specified show information
only about given maps, otherwise list all maps currently loaded on the
system. In case of **name**, *MAP* may match several maps which will all
@ -72,7 +72,7 @@ DESCRIPTION
that hold open file descriptors (FDs) against BPF maps. On such kernels
bpftool will automatically emit this information as well.
**bpftool map create** *FILE* **type** *TYPE* **key** *KEY_SIZE* **value** *VALUE_SIZE* **entries** *MAX_ENTRIES* **name** *NAME* [**flags** *FLAGS*] [**inner_map** *MAP*] [**offload_dev** *NAME*]
bpftool map create *FILE* type *TYPE* key *KEY_SIZE* value *VALUE_SIZE* entries *MAX_ENTRIES* name *NAME* [flags *FLAGS*] [inner_map *MAP*] [offload_dev *NAME*]
Create a new map with given parameters and pin it to *bpffs* as *FILE*.
*FLAGS* should be an integer which is the combination of desired flags,
@ -86,11 +86,11 @@ DESCRIPTION
Keyword **offload_dev** expects a network interface name, and is used to
request hardware offload for the map.
**bpftool map dump** *MAP*
bpftool map dump *MAP*
Dump all entries in a given *MAP*. In case of **name**, *MAP* may match
several maps which will all be dumped.
**bpftool map update** *MAP* [**key** *DATA*] [**value** *VALUE*] [*UPDATE_FLAGS*]
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
@ -103,22 +103,22 @@ DESCRIPTION
unless a "0x" prefix (for hexadecimal) or a "0" prefix (for octal) is
provided.
**bpftool map lookup** *MAP* [**key** *DATA*]
bpftool map lookup *MAP* [key *DATA*]
Lookup **key** in the map.
**bpftool map getnext** *MAP* [**key** *DATA*]
bpftool map getnext *MAP* [key *DATA*]
Get next key. If *key* is not specified, get first key.
**bpftool map delete** *MAP* **key** *DATA*
bpftool map delete *MAP* key *DATA*
Remove entry from the map.
**bpftool map pin** *MAP* *FILE*
bpftool map pin *MAP* *FILE*
Pin map *MAP* as *FILE*.
Note: *FILE* must be located in *bpffs* mount. It must not contain a dot
character ('.'), which is reserved for future extensions of *bpffs*.
**bpftool** **map event_pipe** *MAP* [**cpu** *N* **index** *M*]
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
@ -133,29 +133,29 @@ DESCRIPTION
existing ring. Any other application will stop receiving events if it
installed its rings earlier.
**bpftool map peek** *MAP*
bpftool map peek *MAP*
Peek next value in the queue or stack.
**bpftool map push** *MAP* **value** *VALUE*
bpftool map push *MAP* value *VALUE*
Push *VALUE* onto the stack.
**bpftool map pop** *MAP*
bpftool map pop *MAP*
Pop and print value from the stack.
**bpftool map enqueue** *MAP* **value** *VALUE*
bpftool map enqueue *MAP* value *VALUE*
Enqueue *VALUE* into the queue.
**bpftool map dequeue** *MAP*
bpftool map dequeue *MAP*
Dequeue and print value from the queue.
**bpftool map freeze** *MAP*
bpftool map freeze *MAP*
Freeze the map as read-only from user space. Entries from a frozen map can
not longer be updated or deleted with the **bpf**\ () system call. This
operation is not reversible, and the map remains immutable from user space
until its destruction. However, read and write permissions for BPF programs
to the map remain unchanged.
**bpftool map help**
bpftool map help
Print short help message.
OPTIONS

8
tools/bpf/bpftool/Documentation/bpftool-net.rst
View file

@ -33,7 +33,7 @@ NET COMMANDS
DESCRIPTION
===========
**bpftool net { show | list }** [ **dev** *NAME* ]
bpftool net { show | list } [ dev *NAME* ]
List bpf program attachments in the kernel networking subsystem.
Currently, device driver xdp attachments, tcx, netkit and old-style tc
@ -58,7 +58,7 @@ DESCRIPTION
then all bpf programs attached to non clsact qdiscs, and finally all bpf
programs attached to root and clsact qdisc.
**bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *NAME* [ **overwrite** ]
bpftool net attach *ATTACH_TYPE* *PROG* dev *NAME* [ overwrite ]
Attach bpf program *PROG* to network interface *NAME* with type specified
by *ATTACH_TYPE*. Previously attached bpf program can be replaced by the
command used with **overwrite** option. Currently, only XDP-related modes
@ -70,13 +70,13 @@ DESCRIPTION
**xdpdrv** - Native XDP. runs earliest point in driver's receive path;
**xdpoffload** - Offload XDP. runs directly on NIC on each packet reception;
**bpftool** **net detach** *ATTACH_TYPE* **dev** *NAME*
bpftool net detach *ATTACH_TYPE* dev *NAME*
Detach bpf program attached to network interface *NAME* with type specified
by *ATTACH_TYPE*. To detach bpf program, same *ATTACH_TYPE* previously used
for attach must be specified. Currently, only XDP-related modes are
supported for *ATTACH_TYPE*.
**bpftool net help**
bpftool net help
Print short help message.
OPTIONS

4
tools/bpf/bpftool/Documentation/bpftool-perf.rst
View file

@ -29,7 +29,7 @@ PERF COMMANDS
DESCRIPTION
===========
**bpftool perf { show | list }**
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,
@ -39,7 +39,7 @@ DESCRIPTION
kernel virtual address. The attachment point for u[ret]probe is the file
name and the file offset.
**bpftool perf help**
bpftool perf help
Print short help message.
OPTIONS

22
tools/bpf/bpftool/Documentation/bpftool-prog.rst
View file

@ -67,7 +67,7 @@ PROG COMMANDS
DESCRIPTION
===========
**bpftool prog { show | list }** [*PROG*]
bpftool prog { show | list } [*PROG*]
Show information about loaded programs. If *PROG* is specified show
information only about given programs, otherwise list all programs
currently loaded on the system. In case of **tag** or **name**, *PROG* may
@ -87,7 +87,7 @@ DESCRIPTION
that hold open file descriptors (FDs) against BPF programs. On such kernels
bpftool will automatically emit this information as well.
**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] [**visual**] }]
bpftool prog dump xlated *PROG* [{ file *FILE* | [opcodes] [linum] [visual] }]
Dump eBPF instructions of the programs 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
@ -108,7 +108,7 @@ DESCRIPTION
displayed. If **linum** is specified, the filename, line number and line
column will also be displayed.
**bpftool prog dump jited** *PROG* [{ **file** *FILE* | [**opcodes**] [**linum**] }]
bpftool prog dump jited *PROG* [{ file *FILE* | [opcodes] [linum] }]
Dump jited image (host machine code) of the program.
If *FILE* is specified image will be written to a file, otherwise it will
@ -121,13 +121,13 @@ DESCRIPTION
**linum** is specified, the filename, line number and line column will also
be displayed.
**bpftool prog pin** *PROG* *FILE*
bpftool prog pin *PROG* *FILE*
Pin program *PROG* as *FILE*.
Note: *FILE* must be located in *bpffs* mount. It must not contain a dot
character ('.'), which is reserved for future extensions of *bpffs*.
**bpftool prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** { **idx** *IDX* | **name** *NAME* } *MAP*] [{ **offload_dev** | **xdpmeta_dev** } *NAME*] [**pinmaps** *MAP_DIR*] [**autoattach**]
bpftool prog { load | loadall } *OBJ* *PATH* [type *TYPE*] [map { idx *IDX* | name *NAME* } *MAP*] [{ offload_dev | xdpmeta_dev } *NAME*] [pinmaps *MAP_DIR*] [autoattach]
Load bpf program(s) from binary *OBJ* and pin as *PATH*. **bpftool prog
load** pins only the first program from the *OBJ* as *PATH*. **bpftool prog
loadall** pins all programs from the *OBJ* under *PATH* directory. **type**
@ -156,24 +156,24 @@ DESCRIPTION
Note: *PATH* must be located in *bpffs* mount. It must not contain a dot
character ('.'), which is reserved for future extensions of *bpffs*.
**bpftool prog attach** *PROG* *ATTACH_TYPE* [*MAP*]
bpftool prog attach *PROG* *ATTACH_TYPE* [*MAP*]
Attach bpf program *PROG* (with type specified by *ATTACH_TYPE*). Most
*ATTACH_TYPEs* require a *MAP* parameter, with the exception of
*flow_dissector* which is attached to current networking name space.
**bpftool prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
bpftool prog detach *PROG* *ATTACH_TYPE* [*MAP*]
Detach bpf program *PROG* (with type specified by *ATTACH_TYPE*). Most
*ATTACH_TYPEs* require a *MAP* parameter, with the exception of
*flow_dissector* which is detached from the current networking name space.
**bpftool prog tracelog**
bpftool prog tracelog
Dump the trace pipe of the system to the console (stdout). Hit <Ctrl+C> to
stop printing. BPF programs can write to this trace pipe at runtime with
the **bpf_trace_printk**\ () helper. This should be used only for debugging
purposes. For streaming data from BPF programs to user space, one can use
perf events (see also **bpftool-map**\ (8)).
**bpftool prog run** *PROG* **data_in** *FILE* [**data_out** *FILE* [**data_size_out** *L*]] [**ctx_in** *FILE* [**ctx_out** *FILE* [**ctx_size_out** *M*]]] [**repeat** *N*]
bpftool prog run *PROG* data_in *FILE* [data_out *FILE* [data_size_out *L*]] [ctx_in *FILE* [ctx_out *FILE* [ctx_size_out *M*]]] [repeat *N*]
Run BPF program *PROG* in the kernel testing infrastructure for BPF,
meaning that the program works on the data and context provided by the
user, and not on actual packets or monitored functions etc. Return value
@ -201,12 +201,12 @@ DESCRIPTION
them can take the **ctx_in**/**ctx_out** arguments. bpftool does not
perform checks on program types.
**bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
bpftool prog profile *PROG* [duration *DURATION*] *METRICs*
Profile *METRICs* for bpf program *PROG* for *DURATION* seconds or until
user hits <Ctrl+C>. *DURATION* is optional. If *DURATION* is not specified,
the profiling will run up to **UINT_MAX** seconds.
**bpftool prog help**
bpftool prog help
Print short help message.
OPTIONS

10
tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
View file

@ -36,7 +36,7 @@ STRUCT_OPS COMMANDS
DESCRIPTION
===========
**bpftool struct_ops { show | list }** [*STRUCT_OPS_MAP*]
bpftool struct_ops { show | list } [*STRUCT_OPS_MAP*]
Show brief information about the struct_ops in the system. If
*STRUCT_OPS_MAP* is specified, it shows information only for the given
struct_ops. Otherwise, it lists all struct_ops currently existing in the
@ -45,13 +45,13 @@ DESCRIPTION
Output will start with struct_ops map ID, followed by its map name and its
struct_ops's kernel type.
**bpftool struct_ops dump** [*STRUCT_OPS_MAP*]
bpftool struct_ops dump [*STRUCT_OPS_MAP*]
Dump details information about the struct_ops in the system. If
*STRUCT_OPS_MAP* is specified, it dumps information only for the given
struct_ops. Otherwise, it dumps all struct_ops currently existing in the
system.
**bpftool struct_ops register** *OBJ* [*LINK_DIR*]
bpftool struct_ops register *OBJ* [*LINK_DIR*]
Register bpf struct_ops from *OBJ*. All struct_ops under the ELF section
".struct_ops" and ".struct_ops.link" will be registered to its kernel
subsystem. For each struct_ops in the ".struct_ops.link" section, a link
@ -59,10 +59,10 @@ DESCRIPTION
these links will be pinned with the same name as their corresponding map
name.
**bpftool struct_ops unregister** *STRUCT_OPS_MAP*
bpftool struct_ops unregister *STRUCT_OPS_MAP*
Unregister the *STRUCT_OPS_MAP* from the kernel subsystem.
**bpftool struct_ops help**
bpftool struct_ops help
Print short help message.
OPTIONS