Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Andrii Nakryiko says:

====================
bpf-next 2021-12-10 v2

We've added 115 non-merge commits during the last 26 day(s) which contain
a total of 182 files changed, 5747 insertions(+), 2564 deletions(-).

The main changes are:

1) Various samples fixes, from Alexander Lobakin.

2) BPF CO-RE support in kernel and light skeleton, from Alexei Starovoitov.

3) A batch of new unified APIs for libbpf, logging improvements, version
   querying, etc. Also a batch of old deprecations for old APIs and various
   bug fixes, in preparation for libbpf 1.0, from Andrii Nakryiko.

4) BPF documentation reorganization and improvements, from Christoph Hellwig
   and Dave Tucker.

5) Support for declarative initialization of BPF_MAP_TYPE_PROG_ARRAY in
   libbpf, from Hengqi Chen.

6) Verifier log fixes, from Hou Tao.

7) Runtime-bounded loops support with bpf_loop() helper, from Joanne Koong.

8) Extend branch record capturing to all platforms that support it,
   from Kajol Jain.

9) Light skeleton codegen improvements, from Kumar Kartikeya Dwivedi.

10) bpftool doc-generating script improvements, from Quentin Monnet.

11) Two libbpf v0.6 bug fixes, from Shuyi Cheng and Vincent Minet.

12) Deprecation warning fix for perf/bpf_counter, from Song Liu.

13) MAX_TAIL_CALL_CNT unification and MIPS build fix for libbpf,
    from Tiezhu Yang.

14) BTF_KING_TYPE_TAG follow-up fixes, from Yonghong Song.

15) Selftests fixes and improvements, from Ilya Leoshkevich, Jean-Philippe
    Brucker, Jiri Olsa, Maxim Mikityanskiy, Tirthendu Sarkar, Yucong Sun,
    and others.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (115 commits)
  libbpf: Add "bool skipped" to struct bpf_map
  libbpf: Fix typo in btf__dedup@LIBBPF_0.0.2 definition
  bpftool: Switch bpf_object__load_xattr() to bpf_object__load()
  selftests/bpf: Remove the only use of deprecated bpf_object__load_xattr()
  selftests/bpf: Add test for libbpf's custom log_buf behavior
  selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()
  libbpf: Deprecate bpf_object__load_xattr()
  libbpf: Add per-program log buffer setter and getter
  libbpf: Preserve kernel error code and remove kprobe prog type guessing
  libbpf: Improve logging around BPF program loading
  libbpf: Allow passing user log setting through bpf_object_open_opts
  libbpf: Allow passing preallocated log_buf when loading BTF into kernel
  libbpf: Add OPTS-based bpf_btf_load() API
  libbpf: Fix bpf_prog_load() log_buf logic for log_level 0
  samples/bpf: Remove unneeded variable
  bpf: Remove redundant assignment to pointer t
  selftests/bpf: Fix a compilation warning
  perf/bpf_counter: Use bpf_map_create instead of bpf_create_map
  samples: bpf: Fix 'unknown warning group' build warning on Clang
  samples: bpf: Fix xdp_sample_user.o linking with Clang
  ...
====================

Link: https://lore.kernel.org/r/20211210234746.2100561-1-andrii@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

15 files changed, 66 insertions, 19 deletions

diff --git a/tools/bpf/bpftool/Documentation/Makefile b/tools/bpf/bpftool/Documentation/Makefile
index 692e1b947490..ac8487dcff1d 100644
--- a/tools/bpf/bpftool/Documentation/Makefile
+++ b/tools/bpf/bpftool/Documentation/Makefile
@@ -24,7 +24,7 @@ man: man8
 man8: $(DOC_MAN8)
 
 RST2MAN_DEP := $(shell command -v rst2man 2>/dev/null)
-RST2MAN_OPTS += --verbose
+RST2MAN_OPTS += --verbose --strip-comments
 
 list_pages = $(sort $(basename $(filter-out $(1),$(MAN8_RST))))
 see_also = $(subst " ",, \
diff --git a/tools/bpf/bpftool/Documentation/bpftool-btf.rst b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
index 4425d942dd39..342716f74ec4 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-btf.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-btf
 ================
@@ -7,13 +9,14 @@ tool for inspection of BTF data
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **btf** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | {**-d** | **--debug** } |
-	{ **-B** | **--base-btf** } }
+	*OPTIONS* := { |COMMON_OPTIONS| | { **-B** | **--base-btf** } }
 
 	*COMMANDS* := { **dump** | **help** }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
index 8069d37dd991..a17e9aa314fd 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-cgroup
 ================
@@ -7,13 +9,14 @@ tool for inspection and simple manipulation of eBPF progs
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **cgroup** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
-	{ **-f** | **--bpffs** } }
+	*OPTIONS* := { |COMMON_OPTIONS| | { **-f** | **--bpffs** } }
 
 	*COMMANDS* :=
 	{ **show** | **list** | **tree** | **attach** | **detach** | **help** }
diff --git a/tools/bpf/bpftool/Documentation/bpftool-feature.rst b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
index ab9f57ee4c3a..4ce9a77bc1e0 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-feature.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ===============
 bpftool-feature
 ===============
@@ -7,12 +9,14 @@ tool for inspection of eBPF-related parameters for Linux kernel or net device
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **feature** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { |COMMON_OPTIONS| }
 
 	*COMMANDS* := { **probe** | **help** }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-gen.rst b/tools/bpf/bpftool/Documentation/bpftool-gen.rst
index 2a137f8a4cea..bc276388f432 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-gen.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-gen.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-gen
 ================
@@ -7,13 +9,14 @@ tool for BPF code-generation
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **gen** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
-	{ **-L** | **--use-loader** } }
+	*OPTIONS* := { |COMMON_OPTIONS| | { **-L** | **--use-loader** } }
 
 	*COMMAND* := { **object** | **skeleton** | **help** }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-iter.rst b/tools/bpf/bpftool/Documentation/bpftool-iter.rst
index 471f363a725a..84839d488621 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-iter.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-iter.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ============
 bpftool-iter
 ============
@@ -7,12 +9,14 @@ tool to create BPF iterators
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **iter** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { |COMMON_OPTIONS| }
 
 	*COMMANDS* := { **pin** | **help** }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-link.rst b/tools/bpf/bpftool/Documentation/bpftool-link.rst
index 9434349636a5..52a4eee4af54 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-link.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-link.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-link
 ================
@@ -7,13 +9,14 @@ tool for inspection and simple manipulation of eBPF links
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **link** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
-	{ **-f** | **--bpffs** } | { **-n** | **--nomount** } }
+	*OPTIONS* := { |COMMON_OPTIONS| | { **-f** | **--bpffs** } | { **-n** | **--nomount** } }
 
 	*COMMANDS* := { **show** | **list** | **pin** | **help** }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-map.rst b/tools/bpf/bpftool/Documentation/bpftool-map.rst
index 991d18fd84f2..7c188a598444 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-map.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-map.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-map
 ================
@@ -7,13 +9,14 @@ tool for inspection and simple manipulation of eBPF maps
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **map** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
-	{ **-f** | **--bpffs** } | { **-n** | **--nomount** } }
+	*OPTIONS* := { |COMMON_OPTIONS| | { **-f** | **--bpffs** } | { **-n** | **--nomount** } }
 
 	*COMMANDS* :=
 	{ **show** | **list** | **create** | **dump** | **update** | **lookup** | **getnext** |
diff --git a/tools/bpf/bpftool/Documentation/bpftool-net.rst b/tools/bpf/bpftool/Documentation/bpftool-net.rst
index 7ec57535a7c1..f4e0a516335a 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-net.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-net.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-net
 ================
@@ -7,12 +9,14 @@ tool for inspection of netdev/tc related bpf prog attachments
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **net** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { |COMMON_OPTIONS| }
 
 	*COMMANDS* :=
 	{ **show** | **list** | **attach** | **detach** | **help** }
diff --git a/tools/bpf/bpftool/Documentation/bpftool-perf.rst b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
index ce52798a917d..5fea633a82f1 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-perf.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-perf.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-perf
 ================
@@ -7,12 +9,14 @@ tool for inspection of perf related bpf prog attachments
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **perf** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { |COMMON_OPTIONS| }
 
 	*COMMANDS* :=
 	{ **show** | **list** | **help** }
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index f27265bd589b..a2e9359e554c 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 bpftool-prog
 ================
@@ -7,12 +9,14 @@ tool for inspection and simple manipulation of eBPF progs
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **prog** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } |
+	*OPTIONS* := { |COMMON_OPTIONS| |
 	{ **-f** | **--bpffs** } | { **-m** | **--mapcompat** } | { **-n** | **--nomount** } |
 	{ **-L** | **--use-loader** } }
 
diff --git a/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst b/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
index 02afc0fc14cb..ee53a122c0c7 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ==================
 bpftool-struct_ops
 ==================
@@ -7,12 +9,14 @@ tool to register/unregister/introspect BPF struct_ops
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
 	**bpftool** [*OPTIONS*] **struct_ops** *COMMAND*
 
-	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { |COMMON_OPTIONS| }
 
 	*COMMANDS* :=
 	{ **show** | **list** | **dump** | **register** | **unregister** | **help** }
diff --git a/tools/bpf/bpftool/Documentation/bpftool.rst b/tools/bpf/bpftool/Documentation/bpftool.rst
index 8ac86565c501..7084dd9fa2f8 100644
--- a/tools/bpf/bpftool/Documentation/bpftool.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 ================
 BPFTOOL
 ================
@@ -7,6 +9,8 @@ tool for inspection and simple manipulation of eBPF programs and maps
 
 :Manual section: 8
 
+.. include:: substitutions.rst
+
 SYNOPSIS
 ========
 
@@ -18,8 +22,7 @@ SYNOPSIS
 
 	*OBJECT* := { **map** | **program** | **cgroup** | **perf** | **net** | **feature** }
 
-	*OPTIONS* := { { **-V** | **--version** } |
-	{ **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } }
+	*OPTIONS* := { { **-V** | **--version** } | |COMMON_OPTIONS| }
 
 	*MAP-COMMANDS* :=
 	{ **show** | **list** | **create** | **dump** | **update** | **lookup** | **getnext** |
diff --git a/tools/bpf/bpftool/Documentation/common_options.rst b/tools/bpf/bpftool/Documentation/common_options.rst
index 75adf23202d8..908487b9c2ad 100644
--- a/tools/bpf/bpftool/Documentation/common_options.rst
+++ b/tools/bpf/bpftool/Documentation/common_options.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
 -h, --help
 	  Print short help message (similar to **bpftool help**).
 
diff --git a/tools/bpf/bpftool/Documentation/substitutions.rst b/tools/bpf/bpftool/Documentation/substitutions.rst
new file mode 100644
index 000000000000..ccf1ffa0686c
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/substitutions.rst
@@ -0,0 +1,3 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+.. |COMMON_OPTIONS| replace:: { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-d** | **--debug** } | { **-l** | **--legacy** }