[PATCH net-next 00/11] tools: ynl: generate code for the devlink family

[PATCH net-next 00/11] tools: ynl: generate code for the devlink family

[Jakub Kicinski]

Another chunk of changes to support more capabilities in the YNL
code gen. Devlink brings in deep nesting and directional messages
(requests and responses have different IDs). We need a healthy
dose of codegen changes to support those (I wasn't planning to
support code gen for "directional" families initially, but
the importance of devlink and ethtool is undeniable).

I have 1 more series like this (ethtool support).

Jakub Kicinski (11):
  netlink: specs: devlink: fill in some details important for C
  tools: ynl-gen: use enum names in op strmap more carefully
  tools: ynl-gen: refactor strmap helper generation
  tools: ynl-gen: enable code gen for directional specs
  tools: ynl-gen: try to sort the types more intelligently
  tools: ynl-gen: inherit struct use info
  tools: ynl-gen: walk nested types in depth
  tools: ynl-gen: don't generate forward declarations for policies
  tools: ynl-gen: don't generate forward declarations for policies -
    regen
  tools: ynl: generate code for the devlink family
  tools: ynl: add sample for devlink

 Documentation/netlink/specs/devlink.yaml |   8 +
 tools/net/ynl/generated/Makefile         |   2 +-
 tools/net/ynl/generated/devlink-user.c   | 721 +++++++++++++++++++++++
 tools/net/ynl/generated/devlink-user.h   | 210 +++++++
 tools/net/ynl/generated/fou-user.c       |   3 -
 tools/net/ynl/generated/handshake-user.c |   4 -
 tools/net/ynl/generated/netdev-user.c    |   2 -
 tools/net/ynl/lib/nlspec.py              |  11 +-
 tools/net/ynl/samples/.gitignore         |   1 +
 tools/net/ynl/samples/devlink.c          |  60 ++
 tools/net/ynl/ynl-gen-c.py               | 137 +++--
 11 files changed, 1101 insertions(+), 58 deletions(-)
 create mode 100644 tools/net/ynl/generated/devlink-user.c
 create mode 100644 tools/net/ynl/generated/devlink-user.h
 create mode 100644 tools/net/ynl/samples/devlink.c

-- 
2.40.1

[PATCH net-next 01/11] netlink: specs: devlink: fill in some details important for C

[Jakub Kicinski]

Python YNL is much more forgiving than the C code gen in terms
of the spec completeness. Fill in a handful of devlink details
to make the spec usable in C.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 Documentation/netlink/specs/devlink.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/netlink/specs/devlink.yaml b/Documentation/netlink/specs/devlink.yaml
index 90641668232e..5d46ca966979 100644
--- a/Documentation/netlink/specs/devlink.yaml
+++ b/Documentation/netlink/specs/devlink.yaml
@@ -9,6 +9,7 @@ doc: Partial family for Devlink.
 attribute-sets:
   -
     name: devlink
+    name-prefix: devlink-attr-
     attributes:
       -
         name: bus-name
@@ -95,10 +96,12 @@ doc: Partial family for Devlink.
       -
         name: reload-action-info
         type: nest
+        multi-attr: true
         nested-attributes: dl-reload-act-info
       -
         name: reload-action-stats
         type: nest
+        multi-attr: true
         nested-attributes: dl-reload-act-stats
   -
     name: dl-dev-stats
@@ -196,3 +199,8 @@ doc: Partial family for Devlink.
           attributes:
             - bus-name
             - dev-name
+            - info-driver-name
+            - info-serial-number
+            - info-version-fixed
+            - info-version-running
+            - info-version-stored
-- 
2.40.1

[PATCH net-next 02/11] tools: ynl-gen: use enum names in op strmap more carefully

[Jakub Kicinski]

In preparation for supporting families which use different msg
ids to and from the kernel - make sure the ids in op strmap
are correct. The map is expected to be used mostly for notifications,
don't generate a separate map for the "to kernel" direction.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/generated/fou-user.c | 1 -
 tools/net/ynl/lib/nlspec.py        | 4 ++++
 tools/net/ynl/ynl-gen-c.py         | 6 +++++-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/net/ynl/generated/fou-user.c b/tools/net/ynl/generated/fou-user.c
index c99b5d438021..a0f33bb882e4 100644
--- a/tools/net/ynl/generated/fou-user.c
+++ b/tools/net/ynl/generated/fou-user.c
@@ -16,7 +16,6 @@
 
 /* Enums */
 static const char * const fou_op_strmap[] = {
-	[FOU_CMD_UNSPEC] = "unspec",
 	[FOU_CMD_ADD] = "add",
 	[FOU_CMD_DEL] = "del",
 	[FOU_CMD_GET] = "get",
diff --git a/tools/net/ynl/lib/nlspec.py b/tools/net/ynl/lib/nlspec.py
index ada22b073aa2..bd5da8aaeac7 100644
--- a/tools/net/ynl/lib/nlspec.py
+++ b/tools/net/ynl/lib/nlspec.py
@@ -442,6 +442,10 @@ jsonschema = None
             else:
                 raise Exception("Can't parse directional ops")
 
+            if req_val == req_val_next:
+                req_val = None
+            if rsp_val == rsp_val_next:
+                rsp_val = None
             op = self.new_operation(elem, req_val, rsp_val)
             req_val = req_val_next
             rsp_val = rsp_val_next
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index c07340715601..8a0abf9048db 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -1220,7 +1220,11 @@ _C_KW = {
     map_name = f'{family.name}_op_strmap'
     cw.block_start(line=f"static const char * const {map_name}[] =")
     for op_name, op in family.msgs.items():
-        cw.p(f'[{op.enum_name}] = "{op_name}",')
+        if op.rsp_value:
+            if op.req_value == op.rsp_value:
+                cw.p(f'[{op.enum_name}] = "{op_name}",')
+            else:
+                cw.p(f'[{op.rsp_value}] = "{op_name}",')
     cw.block_end(line=';')
     cw.nl()
 
-- 
2.40.1

[PATCH net-next 03/11] tools: ynl-gen: refactor strmap helper generation

[Jakub Kicinski]

Move generating strmap lookup function to a helper.
No functional changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/ynl-gen-c.py | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 8a0abf9048db..efcf91675dfa 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -1212,6 +1212,21 @@ _C_KW = {
     cw.nl()
 
 
+def _put_enum_to_str_helper(cw, render_name, map_name, arg_name, enum=None):
+    args = [f'int {arg_name}']
+    if enum and not ('enum-name' in enum and not enum['enum-name']):
+        args = [f'enum {render_name} {arg_name}']
+    cw.write_func_prot('const char *', f'{render_name}_str', args)
+    cw.block_start()
+    if enum and enum.type == 'flags':
+        cw.p(f'{arg_name} = ffs({arg_name}) - 1;')
+    cw.p(f'if ({arg_name} < 0 || {arg_name} >= (int)MNL_ARRAY_SIZE({map_name}))')
+    cw.p('return NULL;')
+    cw.p(f'return {map_name}[{arg_name}];')
+    cw.block_end()
+    cw.nl()
+
+
 def put_op_name_fwd(family, cw):
     cw.write_func_prot('const char *', f'{family.name}_op_str', ['int op'], suffix=';')
 
@@ -1228,13 +1243,7 @@ _C_KW = {
     cw.block_end(line=';')
     cw.nl()
 
-    cw.write_func_prot('const char *', f'{family.name}_op_str', ['int op'])
-    cw.block_start()
-    cw.p(f'if (op < 0 || op >= (int)MNL_ARRAY_SIZE({map_name}))')
-    cw.p('return NULL;')
-    cw.p(f'return {map_name}[op];')
-    cw.block_end()
-    cw.nl()
+    _put_enum_to_str_helper(cw, family.name + '_op', map_name, 'op')
 
 
 def put_enum_to_str_fwd(family, cw, enum):
@@ -1252,18 +1261,7 @@ _C_KW = {
     cw.block_end(line=';')
     cw.nl()
 
-    args = [f'enum {enum.render_name} value']
-    if 'enum-name' in enum and not enum['enum-name']:
-        args = ['int value']
-    cw.write_func_prot('const char *', f'{enum.render_name}_str', args)
-    cw.block_start()
-    if enum.type == 'flags':
-        cw.p('value = ffs(value) - 1;')
-    cw.p(f'if (value < 0 || value >= (int)MNL_ARRAY_SIZE({map_name}))')
-    cw.p('return NULL;')
-    cw.p(f'return {map_name}[value];')
-    cw.block_end()
-    cw.nl()
+    _put_enum_to_str_helper(cw, enum.render_name, map_name, 'value', enum=enum)
 
 
 def put_req_nested(ri, struct):
-- 
2.40.1

[PATCH net-next 04/11] tools: ynl-gen: enable code gen for directional specs

[Jakub Kicinski]

I think that user space code gen for directional specs
works after recent changes. Let them through.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/lib/nlspec.py |  7 ++++---
 tools/net/ynl/ynl-gen-c.py  | 10 +++++++---
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/tools/net/ynl/lib/nlspec.py b/tools/net/ynl/lib/nlspec.py
index bd5da8aaeac7..9f7ad87d69af 100644
--- a/tools/net/ynl/lib/nlspec.py
+++ b/tools/net/ynl/lib/nlspec.py
@@ -324,6 +324,7 @@ jsonschema = None
 
     Attributes:
         proto     protocol type (e.g. genetlink)
+        msg_id_model   enum-model for operations (unified, directional etc.)
         license   spec license (loaded from an SPDX tag on the spec)
 
         attr_sets  dict of attribute sets
@@ -349,6 +350,7 @@ jsonschema = None
         super().__init__(self, spec)
 
         self.proto = self.yaml.get('protocol', 'genetlink')
+        self.msg_id_model = self.yaml['operations'].get('enum-model', 'unified')
 
         if schema_path is None:
             schema_path = os.path.dirname(os.path.dirname(spec_path)) + f'/{self.proto}.yaml'
@@ -477,10 +479,9 @@ jsonschema = None
             attr_set = self.new_attr_set(elem)
             self.attr_sets[elem['name']] = attr_set
 
-        msg_id_model = self.yaml['operations'].get('enum-model', 'unified')
-        if msg_id_model == 'unified':
+        if self.msg_id_model == 'unified':
             self._dictify_ops_unified()
-        elif msg_id_model == 'directional':
+        elif self.msg_id_model == 'directional':
             self._dictify_ops_directional()
 
         for op in self.msgs.values():
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index efcf91675dfa..7b3e79e17c01 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -709,9 +709,6 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
     def __init__(self, family, yaml, req_value, rsp_value):
         super().__init__(family, yaml, req_value, rsp_value)
 
-        if req_value != rsp_value:
-            raise Exception("Directional messages not supported by codegen")
-
         self.render_name = family.name + '_' + c_lower(self.name)
 
         self.dual_policy = ('do' in yaml and 'request' in yaml['do']) and \
@@ -2243,6 +2240,13 @@ _C_KW = {
         os.sys.exit(1)
         return
 
+    supported_models = ['unified']
+    if args.mode == 'user':
+        supported_models += ['directional']
+    if parsed.msg_id_model not in supported_models:
+        print(f'Message enum-model {parsed.msg_id_model} not supported for {args.mode} generation')
+        os.sys.exit(1)
+
     cw = CodeWriter(BaseNlLib(), out_file)
 
     _, spec_kernel = find_kernel_root(args.spec)
-- 
2.40.1

[PATCH net-next 05/11] tools: ynl-gen: try to sort the types more intelligently

[Jakub Kicinski]

We need to sort the structures to avoid the need for forward
declarations. While at it remove the sort of structs when
rendering, it doesn't do anything.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/ynl-gen-c.py | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 7b3e79e17c01..d9c74a678df8 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -875,6 +875,28 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
                         inherit.add('idx')
                     self.pure_nested_structs[nested].set_inherited(inherit)
 
+        # Try to reorder according to dependencies
+        pns_key_list = list(self.pure_nested_structs.keys())
+        pns_key_seen = set()
+        rounds = len(pns_key_list)**2  # it's basically bubble sort
+        for _ in range(rounds):
+            if len(pns_key_list) == 0:
+                break
+            name = pns_key_list.pop(0)
+            finished = True
+            for _, spec in self.attr_sets[name].items():
+                if 'nested-attributes' in spec:
+                    if spec['nested-attributes'] not in pns_key_seen:
+                        # Dicts are sorted, this will make struct last
+                        struct = self.pure_nested_structs.pop(name)
+                        self.pure_nested_structs[name] = struct
+                        finished = False
+                        break
+            if finished:
+                pns_key_seen.add(name)
+            else:
+                pns_key_list.append(name)
+
     def _load_all_notify(self):
         for op_name, op in self.ops.items():
             if not op:
@@ -2379,7 +2401,7 @@ _C_KW = {
             cw.nl()
 
             cw.p('/* Common nested types */')
-            for attr_set, struct in sorted(parsed.pure_nested_structs.items()):
+            for attr_set, struct in parsed.pure_nested_structs.items():
                 ri = RenderInfo(cw, parsed, args.mode, "", "", "", attr_set)
                 print_type_full(ri, struct)
 
@@ -2448,7 +2470,7 @@ _C_KW = {
                 put_typol(cw, struct)
 
             cw.p('/* Common nested types */')
-            for attr_set, struct in sorted(parsed.pure_nested_structs.items()):
+            for attr_set, struct in parsed.pure_nested_structs.items():
                 ri = RenderInfo(cw, parsed, args.mode, "", "", "", attr_set)
 
                 free_rsp_nested(ri, struct)
-- 
2.40.1

[PATCH net-next 06/11] tools: ynl-gen: inherit struct use info

[Jakub Kicinski]

We only render parse and netlink generation helpers as needed,
to avoid generating dead code. Propagate the information from
first- and second-layer attribute sets onto all children.
Otherwise devlink won't work, it has a lot more levels of nesting.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/ynl-gen-c.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index d9c74a678df8..1a97cd517116 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -896,6 +896,14 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
                 pns_key_seen.add(name)
             else:
                 pns_key_list.append(name)
+        # Propagate the request / reply
+        for attr_set, struct in reversed(self.pure_nested_structs.items()):
+            for _, spec in self.attr_sets[attr_set].items():
+                if 'nested-attributes' in spec:
+                    child = self.pure_nested_structs.get(spec['nested-attributes'])
+                    if child:
+                        child.request |= struct.request
+                        child.reply |= struct.reply
 
     def _load_all_notify(self):
         for op_name, op in self.ops.items():
-- 
2.40.1

[PATCH net-next 07/11] tools: ynl-gen: walk nested types in depth

[Jakub Kicinski]

So far we had only created structures for nested types nested
directly in messages (second level of attrs so to speak).
Walk types in depth to support deeper nesting.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/ynl-gen-c.py | 41 +++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 12 deletions(-)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 1a97cd517116..0cb0f74e714b 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -854,27 +854,44 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
                 self.root_sets[op['attribute-set']]['reply'].update(rsp_attrs)
 
     def _load_nested_sets(self):
+        attr_set_queue = list(self.root_sets.keys())
+        attr_set_seen = set(self.root_sets.keys())
+
+        while len(attr_set_queue):
+            a_set = attr_set_queue.pop(0)
+            for attr, spec in self.attr_sets[a_set].items():
+                if 'nested-attributes' not in spec:
+                    continue
+
+                nested = spec['nested-attributes']
+                if nested not in attr_set_seen:
+                    attr_set_queue.append(nested)
+                    attr_set_seen.add(nested)
+
+                inherit = set()
+                if nested not in self.root_sets:
+                    if nested not in self.pure_nested_structs:
+                        self.pure_nested_structs[nested] = Struct(self, nested, inherited=inherit)
+                else:
+                    raise Exception(f'Using attr set as root and nested not supported - {nested}')
+
+                if 'type-value' in spec:
+                    if nested in self.root_sets:
+                        raise Exception("Inheriting members to a space used as root not supported")
+                    inherit.update(set(spec['type-value']))
+                elif spec['type'] == 'array-nest':
+                    inherit.add('idx')
+                self.pure_nested_structs[nested].set_inherited(inherit)
+
         for root_set, rs_members in self.root_sets.items():
             for attr, spec in self.attr_sets[root_set].items():
                 if 'nested-attributes' in spec:
-                    inherit = set()
                     nested = spec['nested-attributes']
-                    if nested not in self.root_sets:
-                        if nested not in self.pure_nested_structs:
-                            self.pure_nested_structs[nested] = Struct(self, nested, inherited=inherit)
                     if attr in rs_members['request']:
                         self.pure_nested_structs[nested].request = True
                     if attr in rs_members['reply']:
                         self.pure_nested_structs[nested].reply = True
 
-                    if 'type-value' in spec:
-                        if nested in self.root_sets:
-                            raise Exception("Inheriting members to a space used as root not supported")
-                        inherit.update(set(spec['type-value']))
-                    elif spec['type'] == 'array-nest':
-                        inherit.add('idx')
-                    self.pure_nested_structs[nested].set_inherited(inherit)
-
         # Try to reorder according to dependencies
         pns_key_list = list(self.pure_nested_structs.keys())
         pns_key_seen = set()
-- 
2.40.1

[PATCH net-next 08/11] tools: ynl-gen: don't generate forward declarations for policies

[Jakub Kicinski]

Now that all nested types have structs and are sorted topologically
there should be no need to generate forward declarations for policies.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/ynl-gen-c.py | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 0cb0f74e714b..251c5bfffd8d 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -1235,10 +1235,6 @@ _C_KW = {
     print_prototype(ri, "request")
 
 
-def put_typol_fwd(cw, struct):
-    cw.p(f'extern struct ynl_policy_nest {struct.render_name}_nest;')
-
-
 def put_typol(cw, struct):
     type_max = struct.attr_set.max_name
     cw.block_start(line=f'struct ynl_policy_attr {struct.render_name}_policy[{type_max} + 1] =')
@@ -2485,12 +2481,10 @@ _C_KW = {
             cw.nl()
 
             cw.p('/* Policies */')
-            for name, _ in parsed.attr_sets.items():
+            for name in parsed.pure_nested_structs:
                 struct = Struct(parsed, name)
-                put_typol_fwd(cw, struct)
-            cw.nl()
-
-            for name, _ in parsed.attr_sets.items():
+                put_typol(cw, struct)
+            for name in parsed.root_sets:
                 struct = Struct(parsed, name)
                 put_typol(cw, struct)
 
-- 
2.40.1

[PATCH net-next 09/11] tools: ynl-gen: don't generate forward declarations for policies - regen

[Jakub Kicinski]

Renegerate code after dropping forward declarations for policies.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/generated/fou-user.c       | 2 --
 tools/net/ynl/generated/handshake-user.c | 4 ----
 tools/net/ynl/generated/netdev-user.c    | 2 --
 3 files changed, 8 deletions(-)

diff --git a/tools/net/ynl/generated/fou-user.c b/tools/net/ynl/generated/fou-user.c
index a0f33bb882e4..c08c85a6b6c4 100644
--- a/tools/net/ynl/generated/fou-user.c
+++ b/tools/net/ynl/generated/fou-user.c
@@ -42,8 +42,6 @@ const char *fou_encap_type_str(int value)
 }
 
 /* Policies */
-extern struct ynl_policy_nest fou_nest;
-
 struct ynl_policy_attr fou_policy[FOU_ATTR_MAX + 1] = {
 	[FOU_ATTR_UNSPEC] = { .name = "unspec", .type = YNL_PT_REJECT, },
 	[FOU_ATTR_PORT] = { .name = "port", .type = YNL_PT_U16, },
diff --git a/tools/net/ynl/generated/handshake-user.c b/tools/net/ynl/generated/handshake-user.c
index fe99c4ef7373..72eb1c52a8fc 100644
--- a/tools/net/ynl/generated/handshake-user.c
+++ b/tools/net/ynl/generated/handshake-user.c
@@ -69,10 +69,6 @@ const char *handshake_auth_str(enum handshake_auth value)
 }
 
 /* Policies */
-extern struct ynl_policy_nest handshake_x509_nest;
-extern struct ynl_policy_nest handshake_accept_nest;
-extern struct ynl_policy_nest handshake_done_nest;
-
 struct ynl_policy_attr handshake_x509_policy[HANDSHAKE_A_X509_MAX + 1] = {
 	[HANDSHAKE_A_X509_CERT] = { .name = "cert", .type = YNL_PT_U32, },
 	[HANDSHAKE_A_X509_PRIVKEY] = { .name = "privkey", .type = YNL_PT_U32, },
diff --git a/tools/net/ynl/generated/netdev-user.c b/tools/net/ynl/generated/netdev-user.c
index aea5c7cc8ead..3db6921b9fab 100644
--- a/tools/net/ynl/generated/netdev-user.c
+++ b/tools/net/ynl/generated/netdev-user.c
@@ -48,8 +48,6 @@ const char *netdev_xdp_act_str(enum netdev_xdp_act value)
 }
 
 /* Policies */
-extern struct ynl_policy_nest netdev_dev_nest;
-
 struct ynl_policy_attr netdev_dev_policy[NETDEV_A_DEV_MAX + 1] = {
 	[NETDEV_A_DEV_IFINDEX] = { .name = "ifindex", .type = YNL_PT_U32, },
 	[NETDEV_A_DEV_PAD] = { .name = "pad", .type = YNL_PT_IGNORE, },
-- 
2.40.1

[PATCH net-next 10/11] tools: ynl: generate code for the devlink family

[Jakub Kicinski]

Admittedly the devlink.yaml spec is fairly limitted,
it only covers basic device get and info-get ops.
That's sufficient to be useful (monitoring FW versions
in the fleet). Plus it gives us a chance to exercise
deep nesting and directional messaging in YNL.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/generated/Makefile       |   2 +-
 tools/net/ynl/generated/devlink-user.c | 721 +++++++++++++++++++++++++
 tools/net/ynl/generated/devlink-user.h | 210 +++++++
 3 files changed, 932 insertions(+), 1 deletion(-)
 create mode 100644 tools/net/ynl/generated/devlink-user.c
 create mode 100644 tools/net/ynl/generated/devlink-user.h

diff --git a/tools/net/ynl/generated/Makefile b/tools/net/ynl/generated/Makefile
index 916723193b60..8ce610910b8d 100644
--- a/tools/net/ynl/generated/Makefile
+++ b/tools/net/ynl/generated/Makefile
@@ -9,7 +9,7 @@ endif
 
 TOOL:=../ynl-gen-c.py
 
-GENS:=handshake fou netdev
+GENS:=devlink handshake fou netdev
 SRCS=$(patsubst %,%-user.c,${GENS})
 HDRS=$(patsubst %,%-user.h,${GENS})
 OBJS=$(patsubst %,%-user.o,${GENS})
diff --git a/tools/net/ynl/generated/devlink-user.c b/tools/net/ynl/generated/devlink-user.c
new file mode 100644
index 000000000000..c3204e20b971
--- /dev/null
+++ b/tools/net/ynl/generated/devlink-user.c
@@ -0,0 +1,721 @@
+// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/devlink.yaml */
+/* YNL-GEN user source */
+
+#include <stdlib.h>
+#include "devlink-user.h"
+#include "ynl.h"
+#include <linux/devlink.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <libmnl/libmnl.h>
+#include <linux/genetlink.h>
+
+/* Enums */
+static const char * const devlink_op_strmap[] = {
+	[3] = "get",
+	[DEVLINK_CMD_INFO_GET] = "info-get",
+};
+
+const char *devlink_op_str(int op)
+{
+	if (op < 0 || op >= (int)MNL_ARRAY_SIZE(devlink_op_strmap))
+		return NULL;
+	return devlink_op_strmap[op];
+}
+
+/* Policies */
+struct ynl_policy_attr devlink_dl_info_version_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_INFO_VERSION_NAME] = { .name = "info-version-name", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_INFO_VERSION_VALUE] = { .name = "info-version-value", .type = YNL_PT_NUL_STR, },
+};
+
+struct ynl_policy_nest devlink_dl_info_version_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_info_version_policy,
+};
+
+struct ynl_policy_attr devlink_dl_reload_stats_entry_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_RELOAD_STATS_LIMIT] = { .name = "reload-stats-limit", .type = YNL_PT_U8, },
+	[DEVLINK_ATTR_RELOAD_STATS_VALUE] = { .name = "reload-stats-value", .type = YNL_PT_U32, },
+};
+
+struct ynl_policy_nest devlink_dl_reload_stats_entry_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_reload_stats_entry_policy,
+};
+
+struct ynl_policy_attr devlink_dl_reload_act_stats_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_RELOAD_STATS_ENTRY] = { .name = "reload-stats-entry", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_entry_nest, },
+};
+
+struct ynl_policy_nest devlink_dl_reload_act_stats_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_reload_act_stats_policy,
+};
+
+struct ynl_policy_attr devlink_dl_reload_act_info_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_RELOAD_ACTION] = { .name = "reload-action", .type = YNL_PT_U8, },
+	[DEVLINK_ATTR_RELOAD_ACTION_STATS] = { .name = "reload-action-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_act_stats_nest, },
+};
+
+struct ynl_policy_nest devlink_dl_reload_act_info_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_reload_act_info_policy,
+};
+
+struct ynl_policy_attr devlink_dl_reload_stats_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_RELOAD_ACTION_INFO] = { .name = "reload-action-info", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_act_info_nest, },
+};
+
+struct ynl_policy_nest devlink_dl_reload_stats_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_reload_stats_policy,
+};
+
+struct ynl_policy_attr devlink_dl_dev_stats_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_RELOAD_STATS] = { .name = "reload-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_nest, },
+	[DEVLINK_ATTR_REMOTE_RELOAD_STATS] = { .name = "remote-reload-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_nest, },
+};
+
+struct ynl_policy_nest devlink_dl_dev_stats_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_dl_dev_stats_policy,
+};
+
+struct ynl_policy_attr devlink_policy[DEVLINK_ATTR_MAX + 1] = {
+	[DEVLINK_ATTR_BUS_NAME] = { .name = "bus-name", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_DEV_NAME] = { .name = "dev-name", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_PORT_INDEX] = { .name = "port-index", .type = YNL_PT_U32, },
+	[DEVLINK_ATTR_INFO_DRIVER_NAME] = { .name = "info-driver-name", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_INFO_SERIAL_NUMBER] = { .name = "info-serial-number", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_INFO_VERSION_FIXED] = { .name = "info-version-fixed", .type = YNL_PT_NEST, .nest = &devlink_dl_info_version_nest, },
+	[DEVLINK_ATTR_INFO_VERSION_RUNNING] = { .name = "info-version-running", .type = YNL_PT_NEST, .nest = &devlink_dl_info_version_nest, },
+	[DEVLINK_ATTR_INFO_VERSION_STORED] = { .name = "info-version-stored", .type = YNL_PT_NEST, .nest = &devlink_dl_info_version_nest, },
+	[DEVLINK_ATTR_INFO_VERSION_NAME] = { .name = "info-version-name", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_INFO_VERSION_VALUE] = { .name = "info-version-value", .type = YNL_PT_NUL_STR, },
+	[DEVLINK_ATTR_RELOAD_FAILED] = { .name = "reload-failed", .type = YNL_PT_U8, },
+	[DEVLINK_ATTR_RELOAD_ACTION] = { .name = "reload-action", .type = YNL_PT_U8, },
+	[DEVLINK_ATTR_DEV_STATS] = { .name = "dev-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_dev_stats_nest, },
+	[DEVLINK_ATTR_RELOAD_STATS] = { .name = "reload-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_nest, },
+	[DEVLINK_ATTR_RELOAD_STATS_ENTRY] = { .name = "reload-stats-entry", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_entry_nest, },
+	[DEVLINK_ATTR_RELOAD_STATS_LIMIT] = { .name = "reload-stats-limit", .type = YNL_PT_U8, },
+	[DEVLINK_ATTR_RELOAD_STATS_VALUE] = { .name = "reload-stats-value", .type = YNL_PT_U32, },
+	[DEVLINK_ATTR_REMOTE_RELOAD_STATS] = { .name = "remote-reload-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_stats_nest, },
+	[DEVLINK_ATTR_RELOAD_ACTION_INFO] = { .name = "reload-action-info", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_act_info_nest, },
+	[DEVLINK_ATTR_RELOAD_ACTION_STATS] = { .name = "reload-action-stats", .type = YNL_PT_NEST, .nest = &devlink_dl_reload_act_stats_nest, },
+};
+
+struct ynl_policy_nest devlink_nest = {
+	.max_attr = DEVLINK_ATTR_MAX,
+	.table = devlink_policy,
+};
+
+/* Common nested types */
+void devlink_dl_info_version_free(struct devlink_dl_info_version *obj)
+{
+	free(obj->info_version_name);
+	free(obj->info_version_value);
+}
+
+int devlink_dl_info_version_parse(struct ynl_parse_arg *yarg,
+				  const struct nlattr *nested)
+{
+	struct devlink_dl_info_version *dst = yarg->data;
+	const struct nlattr *attr;
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.info_version_name_len = len;
+			dst->info_version_name = malloc(len + 1);
+			memcpy(dst->info_version_name, mnl_attr_get_str(attr), len);
+			dst->info_version_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_VALUE) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.info_version_value_len = len;
+			dst->info_version_value = malloc(len + 1);
+			memcpy(dst->info_version_value, mnl_attr_get_str(attr), len);
+			dst->info_version_value[len] = 0;
+		}
+	}
+
+	return 0;
+}
+
+void
+devlink_dl_reload_stats_entry_free(struct devlink_dl_reload_stats_entry *obj)
+{
+}
+
+int devlink_dl_reload_stats_entry_parse(struct ynl_parse_arg *yarg,
+					const struct nlattr *nested)
+{
+	struct devlink_dl_reload_stats_entry *dst = yarg->data;
+	const struct nlattr *attr;
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_STATS_LIMIT) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_stats_limit = 1;
+			dst->reload_stats_limit = mnl_attr_get_u8(attr);
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_STATS_VALUE) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_stats_value = 1;
+			dst->reload_stats_value = mnl_attr_get_u32(attr);
+		}
+	}
+
+	return 0;
+}
+
+void devlink_dl_reload_act_stats_free(struct devlink_dl_reload_act_stats *obj)
+{
+	unsigned int i;
+
+	for (i = 0; i < obj->n_reload_stats_entry; i++)
+		devlink_dl_reload_stats_entry_free(&obj->reload_stats_entry[i]);
+	free(obj->reload_stats_entry);
+}
+
+int devlink_dl_reload_act_stats_parse(struct ynl_parse_arg *yarg,
+				      const struct nlattr *nested)
+{
+	struct devlink_dl_reload_act_stats *dst = yarg->data;
+	unsigned int n_reload_stats_entry = 0;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+	int i;
+
+	parg.ys = yarg->ys;
+
+	if (dst->reload_stats_entry)
+		return ynl_error_parse(yarg, "attribute already present (dl-reload-act-stats.reload-stats-entry)");
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_STATS_ENTRY) {
+			n_reload_stats_entry++;
+		}
+	}
+
+	if (n_reload_stats_entry) {
+		dst->reload_stats_entry = calloc(n_reload_stats_entry, sizeof(*dst->reload_stats_entry));
+		dst->n_reload_stats_entry = n_reload_stats_entry;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_reload_stats_entry_nest;
+		mnl_attr_for_each_nested(attr, nested) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_STATS_ENTRY) {
+				parg.data = &dst->reload_stats_entry[i];
+				if (devlink_dl_reload_stats_entry_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+
+	return 0;
+}
+
+void devlink_dl_reload_act_info_free(struct devlink_dl_reload_act_info *obj)
+{
+	unsigned int i;
+
+	for (i = 0; i < obj->n_reload_action_stats; i++)
+		devlink_dl_reload_act_stats_free(&obj->reload_action_stats[i]);
+	free(obj->reload_action_stats);
+}
+
+int devlink_dl_reload_act_info_parse(struct ynl_parse_arg *yarg,
+				     const struct nlattr *nested)
+{
+	struct devlink_dl_reload_act_info *dst = yarg->data;
+	unsigned int n_reload_action_stats = 0;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+	int i;
+
+	parg.ys = yarg->ys;
+
+	if (dst->reload_action_stats)
+		return ynl_error_parse(yarg, "attribute already present (dl-reload-act-info.reload-action-stats)");
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_action = 1;
+			dst->reload_action = mnl_attr_get_u8(attr);
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION_STATS) {
+			n_reload_action_stats++;
+		}
+	}
+
+	if (n_reload_action_stats) {
+		dst->reload_action_stats = calloc(n_reload_action_stats, sizeof(*dst->reload_action_stats));
+		dst->n_reload_action_stats = n_reload_action_stats;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_reload_act_stats_nest;
+		mnl_attr_for_each_nested(attr, nested) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION_STATS) {
+				parg.data = &dst->reload_action_stats[i];
+				if (devlink_dl_reload_act_stats_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+
+	return 0;
+}
+
+void devlink_dl_reload_stats_free(struct devlink_dl_reload_stats *obj)
+{
+	unsigned int i;
+
+	for (i = 0; i < obj->n_reload_action_info; i++)
+		devlink_dl_reload_act_info_free(&obj->reload_action_info[i]);
+	free(obj->reload_action_info);
+}
+
+int devlink_dl_reload_stats_parse(struct ynl_parse_arg *yarg,
+				  const struct nlattr *nested)
+{
+	struct devlink_dl_reload_stats *dst = yarg->data;
+	unsigned int n_reload_action_info = 0;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+	int i;
+
+	parg.ys = yarg->ys;
+
+	if (dst->reload_action_info)
+		return ynl_error_parse(yarg, "attribute already present (dl-reload-stats.reload-action-info)");
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION_INFO) {
+			n_reload_action_info++;
+		}
+	}
+
+	if (n_reload_action_info) {
+		dst->reload_action_info = calloc(n_reload_action_info, sizeof(*dst->reload_action_info));
+		dst->n_reload_action_info = n_reload_action_info;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_reload_act_info_nest;
+		mnl_attr_for_each_nested(attr, nested) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION_INFO) {
+				parg.data = &dst->reload_action_info[i];
+				if (devlink_dl_reload_act_info_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+
+	return 0;
+}
+
+void devlink_dl_dev_stats_free(struct devlink_dl_dev_stats *obj)
+{
+	devlink_dl_reload_stats_free(&obj->reload_stats);
+	devlink_dl_reload_stats_free(&obj->remote_reload_stats);
+}
+
+int devlink_dl_dev_stats_parse(struct ynl_parse_arg *yarg,
+			       const struct nlattr *nested)
+{
+	struct devlink_dl_dev_stats *dst = yarg->data;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+
+	parg.ys = yarg->ys;
+
+	mnl_attr_for_each_nested(attr, nested) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_STATS) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_stats = 1;
+
+			parg.rsp_policy = &devlink_dl_reload_stats_nest;
+			parg.data = &dst->reload_stats;
+			if (devlink_dl_reload_stats_parse(&parg, attr))
+				return MNL_CB_ERROR;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_REMOTE_RELOAD_STATS) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.remote_reload_stats = 1;
+
+			parg.rsp_policy = &devlink_dl_reload_stats_nest;
+			parg.data = &dst->remote_reload_stats;
+			if (devlink_dl_reload_stats_parse(&parg, attr))
+				return MNL_CB_ERROR;
+		}
+	}
+
+	return 0;
+}
+
+/* ============== DEVLINK_CMD_GET ============== */
+/* DEVLINK_CMD_GET - do */
+void devlink_get_req_free(struct devlink_get_req *req)
+{
+	free(req->bus_name);
+	free(req->dev_name);
+	free(req);
+}
+
+void devlink_get_rsp_free(struct devlink_get_rsp *rsp)
+{
+	free(rsp->bus_name);
+	free(rsp->dev_name);
+	devlink_dl_dev_stats_free(&rsp->dev_stats);
+	free(rsp);
+}
+
+int devlink_get_rsp_parse(const struct nlmsghdr *nlh, void *data)
+{
+	struct ynl_parse_arg *yarg = data;
+	struct devlink_get_rsp *dst;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+
+	dst = yarg->data;
+	parg.ys = yarg->ys;
+
+	mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_BUS_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.bus_name_len = len;
+			dst->bus_name = malloc(len + 1);
+			memcpy(dst->bus_name, mnl_attr_get_str(attr), len);
+			dst->bus_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_DEV_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.dev_name_len = len;
+			dst->dev_name = malloc(len + 1);
+			memcpy(dst->dev_name, mnl_attr_get_str(attr), len);
+			dst->dev_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_FAILED) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_failed = 1;
+			dst->reload_failed = mnl_attr_get_u8(attr);
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_RELOAD_ACTION) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.reload_action = 1;
+			dst->reload_action = mnl_attr_get_u8(attr);
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_DEV_STATS) {
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+			dst->_present.dev_stats = 1;
+
+			parg.rsp_policy = &devlink_dl_dev_stats_nest;
+			parg.data = &dst->dev_stats;
+			if (devlink_dl_dev_stats_parse(&parg, attr))
+				return MNL_CB_ERROR;
+		}
+	}
+
+	return MNL_CB_OK;
+}
+
+struct devlink_get_rsp *
+devlink_get(struct ynl_sock *ys, struct devlink_get_req *req)
+{
+	struct ynl_req_state yrs = { .yarg = { .ys = ys, }, };
+	struct devlink_get_rsp *rsp;
+	struct nlmsghdr *nlh;
+	int err;
+
+	nlh = ynl_gemsg_start_req(ys, ys->family_id, DEVLINK_CMD_GET, 1);
+	ys->req_policy = &devlink_nest;
+	yrs.yarg.rsp_policy = &devlink_nest;
+
+	if (req->_present.bus_name_len)
+		mnl_attr_put_strz(nlh, DEVLINK_ATTR_BUS_NAME, req->bus_name);
+	if (req->_present.dev_name_len)
+		mnl_attr_put_strz(nlh, DEVLINK_ATTR_DEV_NAME, req->dev_name);
+
+	rsp = calloc(1, sizeof(*rsp));
+	yrs.yarg.data = rsp;
+	yrs.cb = devlink_get_rsp_parse;
+	yrs.rsp_cmd = 3;
+
+	err = ynl_exec(ys, nlh, &yrs);
+	if (err < 0)
+		goto err_free;
+
+	return rsp;
+
+err_free:
+	devlink_get_rsp_free(rsp);
+	return NULL;
+}
+
+/* DEVLINK_CMD_GET - dump */
+void devlink_get_list_free(struct devlink_get_list *rsp)
+{
+	struct devlink_get_list *next = rsp;
+
+	while ((void *)next != YNL_LIST_END) {
+		rsp = next;
+		next = rsp->next;
+
+		free(rsp->obj.bus_name);
+		free(rsp->obj.dev_name);
+		devlink_dl_dev_stats_free(&rsp->obj.dev_stats);
+		free(rsp);
+	}
+}
+
+struct devlink_get_list *devlink_get_dump(struct ynl_sock *ys)
+{
+	struct ynl_dump_state yds = {};
+	struct nlmsghdr *nlh;
+	int err;
+
+	yds.ys = ys;
+	yds.alloc_sz = sizeof(struct devlink_get_list);
+	yds.cb = devlink_get_rsp_parse;
+	yds.rsp_cmd = 3;
+	yds.rsp_policy = &devlink_nest;
+
+	nlh = ynl_gemsg_start_dump(ys, ys->family_id, DEVLINK_CMD_GET, 1);
+
+	err = ynl_exec_dump(ys, nlh, &yds);
+	if (err < 0)
+		goto free_list;
+
+	return yds.first;
+
+free_list:
+	devlink_get_list_free(yds.first);
+	return NULL;
+}
+
+/* ============== DEVLINK_CMD_INFO_GET ============== */
+/* DEVLINK_CMD_INFO_GET - do */
+void devlink_info_get_req_free(struct devlink_info_get_req *req)
+{
+	free(req->bus_name);
+	free(req->dev_name);
+	free(req);
+}
+
+void devlink_info_get_rsp_free(struct devlink_info_get_rsp *rsp)
+{
+	unsigned int i;
+
+	free(rsp->bus_name);
+	free(rsp->dev_name);
+	free(rsp->info_driver_name);
+	free(rsp->info_serial_number);
+	for (i = 0; i < rsp->n_info_version_fixed; i++)
+		devlink_dl_info_version_free(&rsp->info_version_fixed[i]);
+	free(rsp->info_version_fixed);
+	for (i = 0; i < rsp->n_info_version_running; i++)
+		devlink_dl_info_version_free(&rsp->info_version_running[i]);
+	free(rsp->info_version_running);
+	for (i = 0; i < rsp->n_info_version_stored; i++)
+		devlink_dl_info_version_free(&rsp->info_version_stored[i]);
+	free(rsp->info_version_stored);
+	free(rsp);
+}
+
+int devlink_info_get_rsp_parse(const struct nlmsghdr *nlh, void *data)
+{
+	unsigned int n_info_version_running = 0;
+	unsigned int n_info_version_stored = 0;
+	unsigned int n_info_version_fixed = 0;
+	struct ynl_parse_arg *yarg = data;
+	struct devlink_info_get_rsp *dst;
+	const struct nlattr *attr;
+	struct ynl_parse_arg parg;
+	int i;
+
+	dst = yarg->data;
+	parg.ys = yarg->ys;
+
+	if (dst->info_version_fixed)
+		return ynl_error_parse(yarg, "attribute already present (devlink.info-version-fixed)");
+	if (dst->info_version_running)
+		return ynl_error_parse(yarg, "attribute already present (devlink.info-version-running)");
+	if (dst->info_version_stored)
+		return ynl_error_parse(yarg, "attribute already present (devlink.info-version-stored)");
+
+	mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+		if (mnl_attr_get_type(attr) == DEVLINK_ATTR_BUS_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.bus_name_len = len;
+			dst->bus_name = malloc(len + 1);
+			memcpy(dst->bus_name, mnl_attr_get_str(attr), len);
+			dst->bus_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_DEV_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.dev_name_len = len;
+			dst->dev_name = malloc(len + 1);
+			memcpy(dst->dev_name, mnl_attr_get_str(attr), len);
+			dst->dev_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_DRIVER_NAME) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.info_driver_name_len = len;
+			dst->info_driver_name = malloc(len + 1);
+			memcpy(dst->info_driver_name, mnl_attr_get_str(attr), len);
+			dst->info_driver_name[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_SERIAL_NUMBER) {
+			unsigned int len;
+
+			if (ynl_attr_validate(yarg, attr))
+				return MNL_CB_ERROR;
+
+			len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));
+			dst->_present.info_serial_number_len = len;
+			dst->info_serial_number = malloc(len + 1);
+			memcpy(dst->info_serial_number, mnl_attr_get_str(attr), len);
+			dst->info_serial_number[len] = 0;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_FIXED) {
+			n_info_version_fixed++;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_RUNNING) {
+			n_info_version_running++;
+		}
+		else if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_STORED) {
+			n_info_version_stored++;
+		}
+	}
+
+	if (n_info_version_fixed) {
+		dst->info_version_fixed = calloc(n_info_version_fixed, sizeof(*dst->info_version_fixed));
+		dst->n_info_version_fixed = n_info_version_fixed;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_info_version_nest;
+		mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_FIXED) {
+				parg.data = &dst->info_version_fixed[i];
+				if (devlink_dl_info_version_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+	if (n_info_version_running) {
+		dst->info_version_running = calloc(n_info_version_running, sizeof(*dst->info_version_running));
+		dst->n_info_version_running = n_info_version_running;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_info_version_nest;
+		mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_RUNNING) {
+				parg.data = &dst->info_version_running[i];
+				if (devlink_dl_info_version_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+	if (n_info_version_stored) {
+		dst->info_version_stored = calloc(n_info_version_stored, sizeof(*dst->info_version_stored));
+		dst->n_info_version_stored = n_info_version_stored;
+		i = 0;
+		parg.rsp_policy = &devlink_dl_info_version_nest;
+		mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+			if (mnl_attr_get_type(attr) == DEVLINK_ATTR_INFO_VERSION_STORED) {
+				parg.data = &dst->info_version_stored[i];
+				if (devlink_dl_info_version_parse(&parg, attr))
+					return MNL_CB_ERROR;
+				i++;
+			}
+		}
+	}
+
+	return MNL_CB_OK;
+}
+
+struct devlink_info_get_rsp *
+devlink_info_get(struct ynl_sock *ys, struct devlink_info_get_req *req)
+{
+	struct ynl_req_state yrs = { .yarg = { .ys = ys, }, };
+	struct devlink_info_get_rsp *rsp;
+	struct nlmsghdr *nlh;
+	int err;
+
+	nlh = ynl_gemsg_start_req(ys, ys->family_id, DEVLINK_CMD_INFO_GET, 1);
+	ys->req_policy = &devlink_nest;
+	yrs.yarg.rsp_policy = &devlink_nest;
+
+	if (req->_present.bus_name_len)
+		mnl_attr_put_strz(nlh, DEVLINK_ATTR_BUS_NAME, req->bus_name);
+	if (req->_present.dev_name_len)
+		mnl_attr_put_strz(nlh, DEVLINK_ATTR_DEV_NAME, req->dev_name);
+
+	rsp = calloc(1, sizeof(*rsp));
+	yrs.yarg.data = rsp;
+	yrs.cb = devlink_info_get_rsp_parse;
+	yrs.rsp_cmd = DEVLINK_CMD_INFO_GET;
+
+	err = ynl_exec(ys, nlh, &yrs);
+	if (err < 0)
+		goto err_free;
+
+	return rsp;
+
+err_free:
+	devlink_info_get_rsp_free(rsp);
+	return NULL;
+}
+
+const struct ynl_family ynl_devlink_family =  {
+	.name		= "devlink",
+};
diff --git a/tools/net/ynl/generated/devlink-user.h b/tools/net/ynl/generated/devlink-user.h
new file mode 100644
index 000000000000..a008b99b6e24
--- /dev/null
+++ b/tools/net/ynl/generated/devlink-user.h
@@ -0,0 +1,210 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/devlink.yaml */
+/* YNL-GEN user header */
+
+#ifndef _LINUX_DEVLINK_GEN_H
+#define _LINUX_DEVLINK_GEN_H
+
+#include <stdlib.h>
+#include <string.h>
+#include <linux/types.h>
+#include <linux/devlink.h>
+
+struct ynl_sock;
+
+extern const struct ynl_family ynl_devlink_family;
+
+/* Enums */
+const char *devlink_op_str(int op);
+
+/* Common nested types */
+struct devlink_dl_info_version {
+	struct {
+		__u32 info_version_name_len;
+		__u32 info_version_value_len;
+	} _present;
+
+	char *info_version_name;
+	char *info_version_value;
+};
+
+struct devlink_dl_reload_stats_entry {
+	struct {
+		__u32 reload_stats_limit:1;
+		__u32 reload_stats_value:1;
+	} _present;
+
+	__u8 reload_stats_limit;
+	__u32 reload_stats_value;
+};
+
+struct devlink_dl_reload_act_stats {
+	unsigned int n_reload_stats_entry;
+	struct devlink_dl_reload_stats_entry *reload_stats_entry;
+};
+
+struct devlink_dl_reload_act_info {
+	struct {
+		__u32 reload_action:1;
+	} _present;
+
+	__u8 reload_action;
+	unsigned int n_reload_action_stats;
+	struct devlink_dl_reload_act_stats *reload_action_stats;
+};
+
+struct devlink_dl_reload_stats {
+	unsigned int n_reload_action_info;
+	struct devlink_dl_reload_act_info *reload_action_info;
+};
+
+struct devlink_dl_dev_stats {
+	struct {
+		__u32 reload_stats:1;
+		__u32 remote_reload_stats:1;
+	} _present;
+
+	struct devlink_dl_reload_stats reload_stats;
+	struct devlink_dl_reload_stats remote_reload_stats;
+};
+
+/* ============== DEVLINK_CMD_GET ============== */
+/* DEVLINK_CMD_GET - do */
+struct devlink_get_req {
+	struct {
+		__u32 bus_name_len;
+		__u32 dev_name_len;
+	} _present;
+
+	char *bus_name;
+	char *dev_name;
+};
+
+static inline struct devlink_get_req *devlink_get_req_alloc(void)
+{
+	return calloc(1, sizeof(struct devlink_get_req));
+}
+void devlink_get_req_free(struct devlink_get_req *req);
+
+static inline void
+devlink_get_req_set_bus_name(struct devlink_get_req *req, const char *bus_name)
+{
+	free(req->bus_name);
+	req->_present.bus_name_len = strlen(bus_name);
+	req->bus_name = malloc(req->_present.bus_name_len + 1);
+	memcpy(req->bus_name, bus_name, req->_present.bus_name_len);
+	req->bus_name[req->_present.bus_name_len] = 0;
+}
+static inline void
+devlink_get_req_set_dev_name(struct devlink_get_req *req, const char *dev_name)
+{
+	free(req->dev_name);
+	req->_present.dev_name_len = strlen(dev_name);
+	req->dev_name = malloc(req->_present.dev_name_len + 1);
+	memcpy(req->dev_name, dev_name, req->_present.dev_name_len);
+	req->dev_name[req->_present.dev_name_len] = 0;
+}
+
+struct devlink_get_rsp {
+	struct {
+		__u32 bus_name_len;
+		__u32 dev_name_len;
+		__u32 reload_failed:1;
+		__u32 reload_action:1;
+		__u32 dev_stats:1;
+	} _present;
+
+	char *bus_name;
+	char *dev_name;
+	__u8 reload_failed;
+	__u8 reload_action;
+	struct devlink_dl_dev_stats dev_stats;
+};
+
+void devlink_get_rsp_free(struct devlink_get_rsp *rsp);
+
+/*
+ * Get devlink instances.
+ */
+struct devlink_get_rsp *
+devlink_get(struct ynl_sock *ys, struct devlink_get_req *req);
+
+/* DEVLINK_CMD_GET - dump */
+struct devlink_get_list {
+	struct devlink_get_list *next;
+	struct devlink_get_rsp obj __attribute__ ((aligned (8)));
+};
+
+void devlink_get_list_free(struct devlink_get_list *rsp);
+
+struct devlink_get_list *devlink_get_dump(struct ynl_sock *ys);
+
+/* ============== DEVLINK_CMD_INFO_GET ============== */
+/* DEVLINK_CMD_INFO_GET - do */
+struct devlink_info_get_req {
+	struct {
+		__u32 bus_name_len;
+		__u32 dev_name_len;
+	} _present;
+
+	char *bus_name;
+	char *dev_name;
+};
+
+static inline struct devlink_info_get_req *devlink_info_get_req_alloc(void)
+{
+	return calloc(1, sizeof(struct devlink_info_get_req));
+}
+void devlink_info_get_req_free(struct devlink_info_get_req *req);
+
+static inline void
+devlink_info_get_req_set_bus_name(struct devlink_info_get_req *req,
+				  const char *bus_name)
+{
+	free(req->bus_name);
+	req->_present.bus_name_len = strlen(bus_name);
+	req->bus_name = malloc(req->_present.bus_name_len + 1);
+	memcpy(req->bus_name, bus_name, req->_present.bus_name_len);
+	req->bus_name[req->_present.bus_name_len] = 0;
+}
+static inline void
+devlink_info_get_req_set_dev_name(struct devlink_info_get_req *req,
+				  const char *dev_name)
+{
+	free(req->dev_name);
+	req->_present.dev_name_len = strlen(dev_name);
+	req->dev_name = malloc(req->_present.dev_name_len + 1);
+	memcpy(req->dev_name, dev_name, req->_present.dev_name_len);
+	req->dev_name[req->_present.dev_name_len] = 0;
+}
+
+struct devlink_info_get_rsp {
+	struct {
+		__u32 bus_name_len;
+		__u32 dev_name_len;
+		__u32 info_driver_name_len;
+		__u32 info_serial_number_len;
+	} _present;
+
+	char *bus_name;
+	char *dev_name;
+	char *info_driver_name;
+	char *info_serial_number;
+	unsigned int n_info_version_fixed;
+	struct devlink_dl_info_version *info_version_fixed;
+	unsigned int n_info_version_running;
+	struct devlink_dl_info_version *info_version_running;
+	unsigned int n_info_version_stored;
+	struct devlink_dl_info_version *info_version_stored;
+};
+
+void devlink_info_get_rsp_free(struct devlink_info_get_rsp *rsp);
+
+/*
+ * Get device information, like driver name, hardware and firmware versions etc.
+ */
+struct devlink_info_get_rsp *
+devlink_info_get(struct ynl_sock *ys, struct devlink_info_get_req *req);
+
+#endif /* _LINUX_DEVLINK_GEN_H */
-- 
2.40.1

[PATCH net-next 11/11] tools: ynl: add sample for devlink

[Jakub Kicinski]

Add a sample to show off how to issue basic devlink requests.
For added testing issue get requests while walking a dump.

$ ./devlink
netdevsim/netdevsim1:
    driver: netdevsim
    running fw:
        fw.mgmt: 10.20.30
    ...
netdevsim/netdevsim2:
    driver: netdevsim
    running fw:
        fw.mgmt: 10.20.30
    ...

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/samples/.gitignore |  1 +
 tools/net/ynl/samples/devlink.c  | 60 ++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 tools/net/ynl/samples/devlink.c

diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.gitignore
index 7b1f5179cb54..a24678b67557 100644
--- a/tools/net/ynl/samples/.gitignore
+++ b/tools/net/ynl/samples/.gitignore
@@ -1 +1,2 @@
+devlink
 netdev
diff --git a/tools/net/ynl/samples/devlink.c b/tools/net/ynl/samples/devlink.c
new file mode 100644
index 000000000000..d2611d7ebab4
--- /dev/null
+++ b/tools/net/ynl/samples/devlink.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+
+#include <ynl.h>
+
+#include "devlink-user.h"
+
+int main(int argc, char **argv)
+{
+	struct devlink_get_list *devs;
+	struct ynl_sock *ys;
+
+	ys = ynl_sock_create(&ynl_devlink_family, NULL);
+	if (!ys)
+		return 1;
+
+	devs = devlink_get_dump(ys);
+	if (!devs)
+		goto err_close;
+
+	ynl_dump_foreach(devs, d) {
+		struct devlink_info_get_req *info_req;
+		struct devlink_info_get_rsp *info_rsp;
+
+		printf("%s/%s:\n", d->bus_name, d->dev_name);
+
+		info_req = devlink_info_get_req_alloc();
+		devlink_info_get_req_set_bus_name(info_req, d->bus_name);
+		devlink_info_get_req_set_dev_name(info_req, d->dev_name);
+
+		info_rsp = devlink_info_get(ys, info_req);
+		devlink_info_get_req_free(info_req);
+		if (!info_rsp)
+			goto err_free_devs;
+
+		if (info_rsp->_present.info_driver_name_len)
+			printf("    driver: %s\n", info_rsp->info_driver_name);
+		if (info_rsp->n_info_version_running)
+			printf("    running fw:\n");
+		for (unsigned i = 0; i < info_rsp->n_info_version_running; i++)
+			printf("        %s: %s\n",
+			       info_rsp->info_version_running[i].info_version_name,
+			       info_rsp->info_version_running[i].info_version_value);
+		printf("    ...\n");
+		devlink_info_get_rsp_free(info_rsp);
+	}
+	devlink_get_list_free(devs);
+
+	ynl_sock_destroy(ys);
+
+	return 0;
+
+err_free_devs:
+	devlink_get_list_free(devs);
+err_close:
+	fprintf(stderr, "YNL: %s\n", ys->err.msg);
+	ynl_sock_destroy(ys);
+	return 2;
+}
-- 
2.40.1

Re: [PATCH net-next 10/11] tools: ynl: generate code for the devlink family

[Simon Horman]

On Wed, Jun 07, 2023 at 01:24:02PM -0700, Jakub Kicinski wrote:
> Admittedly the devlink.yaml spec is fairly limitted,

nit: limitted -> limited

> it only covers basic device get and info-get ops.
> That's sufficient to be useful (monitoring FW versions
> in the fleet). Plus it gives us a chance to exercise
> deep nesting and directional messaging in YNL.
> 
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

Re: [PATCH net-next 10/11] tools: ynl: generate code for the devlink family

[Jakub Kicinski]

On Thu, 8 Jun 2023 13:48:49 +0200 Simon Horman wrote:
> On Wed, Jun 07, 2023 at 01:24:02PM -0700, Jakub Kicinski wrote:
> > Admittedly the devlink.yaml spec is fairly limitted,  
> 
> nit: limitted -> limited

I'll fix when applying if that's okay (assuming it's the only comment).

Re: [PATCH net-next 00/11] tools: ynl: generate code for the devlink family

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Wed,  7 Jun 2023 13:23:52 -0700 you wrote:
> Another chunk of changes to support more capabilities in the YNL
> code gen. Devlink brings in deep nesting and directional messages
> (requests and responses have different IDs). We need a healthy
> dose of codegen changes to support those (I wasn't planning to
> support code gen for "directional" families initially, but
> the importance of devlink and ethtool is undeniable).
> 
> [...]

Here is the summary with links:
  - [net-next,01/11] netlink: specs: devlink: fill in some details important for C
    https://git.kernel.org/netdev/net-next/c/8947e5037371
  - [net-next,02/11] tools: ynl-gen: use enum names in op strmap more carefully
    https://git.kernel.org/netdev/net-next/c/9858bfc271de
  - [net-next,03/11] tools: ynl-gen: refactor strmap helper generation
    https://git.kernel.org/netdev/net-next/c/6f115d4575ab
  - [net-next,04/11] tools: ynl-gen: enable code gen for directional specs
    https://git.kernel.org/netdev/net-next/c/ff6db4b58c93
  - [net-next,05/11] tools: ynl-gen: try to sort the types more intelligently
    https://git.kernel.org/netdev/net-next/c/6afaa0ef9b0e
  - [net-next,06/11] tools: ynl-gen: inherit struct use info
    https://git.kernel.org/netdev/net-next/c/37487f93b125
  - [net-next,07/11] tools: ynl-gen: walk nested types in depth
    https://git.kernel.org/netdev/net-next/c/eae7af21bdb9
  - [net-next,08/11] tools: ynl-gen: don't generate forward declarations for policies
    https://git.kernel.org/netdev/net-next/c/168dea20ecef
  - [net-next,09/11] tools: ynl-gen: don't generate forward declarations for policies - regen
    https://git.kernel.org/netdev/net-next/c/0a9471219672
  - [net-next,10/11] tools: ynl: generate code for the devlink family
    https://git.kernel.org/netdev/net-next/c/5d1a30eb989a
  - [net-next,11/11] tools: ynl: add sample for devlink
    https://git.kernel.org/netdev/net-next/c/fff8660b5425

You are awesome, thank you!
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Re: [PATCH net-next 10/11] tools: ynl: generate code for the devlink family

[Simon Horman]

On Thu, Jun 08, 2023 at 08:53:00AM -0700, Jakub Kicinski wrote:
> On Thu, 8 Jun 2023 13:48:49 +0200 Simon Horman wrote:
> > On Wed, Jun 07, 2023 at 01:24:02PM -0700, Jakub Kicinski wrote:
> > > Admittedly the devlink.yaml spec is fairly limitted,  
> > 
> > nit: limitted -> limited
> 
> I'll fix when applying if that's okay (assuming it's the only comment).

Sure, that is fine by me.
I don't think I have any further comments on this series.