tools: ynl: user space helpers
Add "fixed" part of the user space Netlink Spec-based library. This will get linked with the protocol implementations to form a full API. Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
parent
a99bfdf647
commit
86878f14d7
@ -78,3 +78,82 @@ to see other examples.
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The code generation itself is performed by ``tools/net/ynl/ynl-gen-c.py``
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but it takes a few arguments so calling it directly for each file
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quickly becomes tedious.
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YNL lib
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=======
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``tools/net/ynl/lib/`` contains an implementation of a C library
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(based on libmnl) which integrates with code generated by
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``tools/net/ynl/ynl-gen-c.py`` to create easy to use netlink wrappers.
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YNL basics
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----------
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The YNL library consists of two parts - the generic code (functions
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prefix by ``ynl_``) and per-family auto-generated code (prefixed
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with the name of the family).
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To create a YNL socket call ynl_sock_create() passing the family
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struct (family structs are exported by the auto-generated code).
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ynl_sock_destroy() closes the socket.
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YNL requests
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------------
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Steps for issuing YNL requests are best explained on an example.
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All the functions and types in this example come from the auto-generated
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code (for the netdev family in this case):
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.. code-block:: c
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// 0. Request and response pointers
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struct netdev_dev_get_req *req;
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struct netdev_dev_get_rsp *d;
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// 1. Allocate a request
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req = netdev_dev_get_req_alloc();
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// 2. Set request parameters (as needed)
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netdev_dev_get_req_set_ifindex(req, ifindex);
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// 3. Issues the request
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d = netdev_dev_get(ys, req);
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// 4. Free the request arguments
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netdev_dev_get_req_free(req);
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// 5. Error check (the return value from step 3)
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if (!d) {
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// 6. Print the YNL-generated error
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fprintf(stderr, "YNL: %s\n", ys->err.msg);
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return -1;
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}
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// ... do stuff with the response @d
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// 7. Free response
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netdev_dev_get_rsp_free(d);
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YNL dumps
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---------
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Performing dumps follows similar pattern as requests.
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Dumps return a list of objects terminated by a special marker,
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or NULL on error. Use ``ynl_dump_foreach()`` to iterate over
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the result.
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YNL notifications
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-----------------
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YNL lib supports using the same socket for notifications and
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requests. In case notifications arrive during processing of a request
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they are queued internally and can be retrieved at a later time.
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To subscribed to notifications use ``ynl_subscribe()``.
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The notifications have to be read out from the socket,
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``ynl_socket_get_fd()`` returns the underlying socket fd which can
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be plugged into appropriate asynchronous IO API like ``poll``,
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or ``select``.
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Notifications can be retrieved using ``ynl_ntf_dequeue()`` and have
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to be freed using ``ynl_ntf_free()``. Since we don't know the notification
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type upfront the notifications are returned as ``struct ynl_ntf_base_type *``
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and user is expected to cast them to the appropriate full type based
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on the ``cmd`` member.
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19
tools/net/ynl/Makefile
Normal file
19
tools/net/ynl/Makefile
Normal file
@ -0,0 +1,19 @@
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# SPDX-License-Identifier: GPL-2.0
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SUBDIRS = lib generated samples
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all: $(SUBDIRS)
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$(SUBDIRS):
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@if [ -f "$@/Makefile" ] ; then \
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$(MAKE) -C $@ ; \
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fi
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clean hardclean:
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@for dir in $(SUBDIRS) ; do \
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if [ -f "$$dir/Makefile" ] ; then \
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$(MAKE) -C $$dir $@; \
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fi \
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done
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.PHONY: clean all $(SUBDIRS)
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45
tools/net/ynl/generated/Makefile
Normal file
45
tools/net/ynl/generated/Makefile
Normal file
@ -0,0 +1,45 @@
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# SPDX-License-Identifier: GPL-2.0
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CC=gcc
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CFLAGS=-std=gnu11 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow \
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-I../lib/
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ifeq ("$(DEBUG)","1")
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CFLAGS += -g -fsanitize=address -fsanitize=leak -static-libasan
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endif
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TOOL:=../ynl-gen-c.py
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GENS:=
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SRCS=$(patsubst %,%-user.c,${GENS})
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HDRS=$(patsubst %,%-user.h,${GENS})
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OBJS=$(patsubst %,%-user.o,${GENS})
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all: protos.a $(HDRS) $(SRCS) $(KHDRS) $(KSRCS) $(UAPI) regen
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protos.a: $(OBJS)
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@echo -e "\tAR $@"
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@ar rcs $@ $(OBJS)
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%-user.h: ../../../../Documentation/netlink/specs/%.yaml $(TOOL)
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@echo -e "\tGEN $@"
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@$(TOOL) --mode user --header --spec $< > $@
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%-user.c: ../../../../Documentation/netlink/specs/%.yaml $(TOOL)
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@echo -e "\tGEN $@"
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@$(TOOL) --mode user --source --spec $< > $@
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%-user.o: %-user.c %-user.h
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@echo -e "\tCC $@"
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@$(COMPILE.c) -c -o $@ $<
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clean:
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rm -f *.o
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hardclean: clean
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rm -f *.c *.h *.a
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regen:
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@../ynl-regen.sh
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.PHONY: all clean hardclean regen
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.DEFAULT_GOAL: all
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28
tools/net/ynl/lib/Makefile
Normal file
28
tools/net/ynl/lib/Makefile
Normal file
@ -0,0 +1,28 @@
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# SPDX-License-Identifier: GPL-2.0
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CC=gcc
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CFLAGS=-std=gnu11 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow
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ifeq ("$(DEBUG)","1")
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CFLAGS += -g -fsanitize=address -fsanitize=leak -static-libasan
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endif
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SRCS=$(wildcard *.c)
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OBJS=$(patsubst %.c,%.o,${SRCS})
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include $(wildcard *.d)
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all: ynl.a
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ynl.a: $(OBJS)
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ar rcs $@ $(OBJS)
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clean:
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rm -f *.o *.d *~
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hardclean: clean
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rm -f *.a
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%.o: %.c
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$(COMPILE.c) -MMD -c -o $@ $<
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.PHONY: all clean
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.DEFAULT_GOAL=all
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901
tools/net/ynl/lib/ynl.c
Normal file
901
tools/net/ynl/lib/ynl.c
Normal file
@ -0,0 +1,901 @@
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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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#include <errno.h>
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#include <poll.h>
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#include <string.h>
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#include <stdlib.h>
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#include <linux/types.h>
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#include <libmnl/libmnl.h>
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#include <linux/genetlink.h>
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#include "ynl.h"
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(*arr))
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#define __yerr_msg(yse, _msg...) \
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({ \
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struct ynl_error *_yse = (yse); \
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\
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if (_yse) { \
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snprintf(_yse->msg, sizeof(_yse->msg) - 1, _msg); \
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_yse->msg[sizeof(_yse->msg) - 1] = 0; \
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} \
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})
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#define __yerr_code(yse, _code...) \
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({ \
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struct ynl_error *_yse = (yse); \
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\
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if (_yse) { \
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_yse->code = _code; \
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} \
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})
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#define __yerr(yse, _code, _msg...) \
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({ \
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__yerr_msg(yse, _msg); \
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__yerr_code(yse, _code); \
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})
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#define __perr(yse, _msg) __yerr(yse, errno, _msg)
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#define yerr_msg(_ys, _msg...) __yerr_msg(&(_ys)->err, _msg)
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#define yerr(_ys, _code, _msg...) __yerr(&(_ys)->err, _code, _msg)
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#define perr(_ys, _msg) __yerr(&(_ys)->err, errno, _msg)
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/* -- Netlink boiler plate */
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static int
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ynl_err_walk_report_one(struct ynl_policy_nest *policy, unsigned int type,
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char *str, int str_sz, int *n)
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{
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if (!policy) {
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if (*n < str_sz)
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*n += snprintf(str, str_sz, "!policy");
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return 1;
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}
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if (type > policy->max_attr) {
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if (*n < str_sz)
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*n += snprintf(str, str_sz, "!oob");
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return 1;
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}
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if (!policy->table[type].name) {
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if (*n < str_sz)
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*n += snprintf(str, str_sz, "!name");
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return 1;
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}
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if (*n < str_sz)
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*n += snprintf(str, str_sz - *n,
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".%s", policy->table[type].name);
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return 0;
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}
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static int
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ynl_err_walk(struct ynl_sock *ys, void *start, void *end, unsigned int off,
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struct ynl_policy_nest *policy, char *str, int str_sz,
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struct ynl_policy_nest **nest_pol)
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{
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unsigned int astart_off, aend_off;
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const struct nlattr *attr;
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unsigned int data_len;
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unsigned int type;
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bool found = false;
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int n = 0;
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if (!policy) {
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if (n < str_sz)
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n += snprintf(str, str_sz, "!policy");
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return n;
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}
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data_len = end - start;
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mnl_attr_for_each_payload(start, data_len) {
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astart_off = (char *)attr - (char *)start;
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aend_off = astart_off + mnl_attr_get_payload_len(attr);
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if (aend_off <= off)
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continue;
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found = true;
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break;
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}
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if (!found)
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return 0;
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off -= astart_off;
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type = mnl_attr_get_type(attr);
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if (ynl_err_walk_report_one(policy, type, str, str_sz, &n))
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return n;
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if (!off) {
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if (nest_pol)
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*nest_pol = policy->table[type].nest;
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return n;
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}
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if (!policy->table[type].nest) {
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if (n < str_sz)
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n += snprintf(str, str_sz, "!nest");
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return n;
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}
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off -= sizeof(struct nlattr);
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start = mnl_attr_get_payload(attr);
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end = start + mnl_attr_get_payload_len(attr);
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return n + ynl_err_walk(ys, start, end, off, policy->table[type].nest,
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&str[n], str_sz - n, nest_pol);
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}
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#define NLMSGERR_ATTR_MISS_TYPE (NLMSGERR_ATTR_POLICY + 1)
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#define NLMSGERR_ATTR_MISS_NEST (NLMSGERR_ATTR_POLICY + 2)
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#define NLMSGERR_ATTR_MAX (NLMSGERR_ATTR_MAX + 2)
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static int
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ynl_ext_ack_check(struct ynl_sock *ys, const struct nlmsghdr *nlh,
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unsigned int hlen)
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{
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const struct nlattr *tb[NLMSGERR_ATTR_MAX + 1] = {};
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char miss_attr[sizeof(ys->err.msg)];
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char bad_attr[sizeof(ys->err.msg)];
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const struct nlattr *attr;
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const char *str = NULL;
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if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS))
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return MNL_CB_OK;
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mnl_attr_for_each(attr, nlh, hlen) {
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unsigned int len, type;
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len = mnl_attr_get_payload_len(attr);
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type = mnl_attr_get_type(attr);
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if (type > NLMSGERR_ATTR_MAX)
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continue;
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tb[type] = attr;
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switch (type) {
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case NLMSGERR_ATTR_OFFS:
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case NLMSGERR_ATTR_MISS_TYPE:
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case NLMSGERR_ATTR_MISS_NEST:
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if (len != sizeof(__u32))
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return MNL_CB_ERROR;
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break;
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case NLMSGERR_ATTR_MSG:
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str = mnl_attr_get_payload(attr);
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if (str[len - 1])
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return MNL_CB_ERROR;
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break;
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default:
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break;
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}
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}
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bad_attr[0] = '\0';
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miss_attr[0] = '\0';
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if (tb[NLMSGERR_ATTR_OFFS]) {
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unsigned int n, off;
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void *start, *end;
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ys->err.attr_offs = mnl_attr_get_u32(tb[NLMSGERR_ATTR_OFFS]);
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n = snprintf(bad_attr, sizeof(bad_attr), "%sbad attribute: ",
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str ? " (" : "");
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start = mnl_nlmsg_get_payload_offset(ys->nlh,
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sizeof(struct genlmsghdr));
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end = mnl_nlmsg_get_payload_tail(ys->nlh);
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off = ys->err.attr_offs;
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off -= sizeof(struct nlmsghdr);
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off -= sizeof(struct genlmsghdr);
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n += ynl_err_walk(ys, start, end, off, ys->req_policy,
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&bad_attr[n], sizeof(bad_attr) - n, NULL);
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if (n >= sizeof(bad_attr))
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n = sizeof(bad_attr) - 1;
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bad_attr[n] = '\0';
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}
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if (tb[NLMSGERR_ATTR_MISS_TYPE]) {
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struct ynl_policy_nest *nest_pol = NULL;
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unsigned int n, off, type;
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void *start, *end;
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int n2;
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type = mnl_attr_get_u32(tb[NLMSGERR_ATTR_MISS_TYPE]);
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n = snprintf(miss_attr, sizeof(miss_attr), "%smissing attribute: ",
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bad_attr[0] ? ", " : (str ? " (" : ""));
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start = mnl_nlmsg_get_payload_offset(ys->nlh,
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sizeof(struct genlmsghdr));
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end = mnl_nlmsg_get_payload_tail(ys->nlh);
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nest_pol = ys->req_policy;
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if (tb[NLMSGERR_ATTR_MISS_NEST]) {
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off = mnl_attr_get_u32(tb[NLMSGERR_ATTR_MISS_NEST]);
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off -= sizeof(struct nlmsghdr);
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off -= sizeof(struct genlmsghdr);
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n += ynl_err_walk(ys, start, end, off, ys->req_policy,
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&miss_attr[n], sizeof(miss_attr) - n,
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&nest_pol);
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}
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n2 = 0;
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ynl_err_walk_report_one(nest_pol, type, &miss_attr[n],
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sizeof(miss_attr) - n, &n2);
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n += n2;
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if (n >= sizeof(miss_attr))
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n = sizeof(miss_attr) - 1;
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miss_attr[n] = '\0';
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}
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/* Implicitly depend on ys->err.code already set */
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if (str)
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yerr_msg(ys, "Kernel %s: '%s'%s%s%s",
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ys->err.code ? "error" : "warning",
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str, bad_attr, miss_attr,
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bad_attr[0] || miss_attr[0] ? ")" : "");
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else if (bad_attr[0] || miss_attr[0])
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yerr_msg(ys, "Kernel %s: %s%s",
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ys->err.code ? "error" : "warning",
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bad_attr, miss_attr);
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return MNL_CB_OK;
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}
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static int ynl_cb_error(const struct nlmsghdr *nlh, void *data)
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{
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const struct nlmsgerr *err = mnl_nlmsg_get_payload(nlh);
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struct ynl_parse_arg *yarg = data;
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unsigned int hlen;
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int code;
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code = err->error >= 0 ? err->error : -err->error;
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yarg->ys->err.code = code;
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errno = code;
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hlen = sizeof(*err);
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if (!(nlh->nlmsg_flags & NLM_F_CAPPED))
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hlen += mnl_nlmsg_get_payload_len(&err->msg);
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ynl_ext_ack_check(yarg->ys, nlh, hlen);
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return code ? MNL_CB_ERROR : MNL_CB_STOP;
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}
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static int ynl_cb_done(const struct nlmsghdr *nlh, void *data)
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{
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struct ynl_parse_arg *yarg = data;
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int err;
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err = *(int *)NLMSG_DATA(nlh);
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if (err < 0) {
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yarg->ys->err.code = -err;
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errno = -err;
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ynl_ext_ack_check(yarg->ys, nlh, sizeof(int));
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return MNL_CB_ERROR;
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}
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return MNL_CB_STOP;
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}
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|
||||
static int ynl_cb_noop(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
return MNL_CB_OK;
|
||||
}
|
||||
|
||||
mnl_cb_t ynl_cb_array[NLMSG_MIN_TYPE] = {
|
||||
[NLMSG_NOOP] = ynl_cb_noop,
|
||||
[NLMSG_ERROR] = ynl_cb_error,
|
||||
[NLMSG_DONE] = ynl_cb_done,
|
||||
[NLMSG_OVERRUN] = ynl_cb_noop,
|
||||
};
|
||||
|
||||
/* Attribute validation */
|
||||
|
||||
int ynl_attr_validate(struct ynl_parse_arg *yarg, const struct nlattr *attr)
|
||||
{
|
||||
struct ynl_policy_attr *policy;
|
||||
unsigned int type, len;
|
||||
unsigned char *data;
|
||||
|
||||
data = mnl_attr_get_payload(attr);
|
||||
len = mnl_attr_get_payload_len(attr);
|
||||
type = mnl_attr_get_type(attr);
|
||||
if (type > yarg->rsp_policy->max_attr) {
|
||||
yerr(yarg->ys, YNL_ERROR_INTERNAL,
|
||||
"Internal error, validating unknown attribute");
|
||||
return -1;
|
||||
}
|
||||
|
||||
policy = &yarg->rsp_policy->table[type];
|
||||
|
||||
switch (policy->type) {
|
||||
case YNL_PT_REJECT:
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Rejected attribute (%s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_IGNORE:
|
||||
break;
|
||||
case YNL_PT_U8:
|
||||
if (len == sizeof(__u8))
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (u8 %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_U16:
|
||||
if (len == sizeof(__u16))
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (u16 %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_U32:
|
||||
if (len == sizeof(__u32))
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (u32 %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_U64:
|
||||
if (len == sizeof(__u64))
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (u64 %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_FLAG:
|
||||
/* Let flags grow into real attrs, why not.. */
|
||||
break;
|
||||
case YNL_PT_NEST:
|
||||
if (!len || len >= sizeof(*attr))
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (nest %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_BINARY:
|
||||
if (!policy->len || len == policy->len)
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (binary %s)", policy->name);
|
||||
return -1;
|
||||
case YNL_PT_NUL_STR:
|
||||
if ((!policy->len || len <= policy->len) && !data[len - 1])
|
||||
break;
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (string %s)", policy->name);
|
||||
return -1;
|
||||
default:
|
||||
yerr(yarg->ys, YNL_ERROR_ATTR_INVALID,
|
||||
"Invalid attribute (unknown %s)", policy->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Generic code */
|
||||
|
||||
static void ynl_err_reset(struct ynl_sock *ys)
|
||||
{
|
||||
ys->err.code = 0;
|
||||
ys->err.attr_offs = 0;
|
||||
ys->err.msg[0] = 0;
|
||||
}
|
||||
|
||||
struct nlmsghdr *ynl_msg_start(struct ynl_sock *ys, __u32 id, __u16 flags)
|
||||
{
|
||||
struct nlmsghdr *nlh;
|
||||
|
||||
ynl_err_reset(ys);
|
||||
|
||||
nlh = ys->nlh = mnl_nlmsg_put_header(ys->tx_buf);
|
||||
nlh->nlmsg_type = id;
|
||||
nlh->nlmsg_flags = flags;
|
||||
nlh->nlmsg_seq = ++ys->seq;
|
||||
|
||||
return nlh;
|
||||
}
|
||||
|
||||
struct nlmsghdr *
|
||||
ynl_gemsg_start(struct ynl_sock *ys, __u32 id, __u16 flags,
|
||||
__u8 cmd, __u8 version)
|
||||
{
|
||||
struct genlmsghdr gehdr;
|
||||
struct nlmsghdr *nlh;
|
||||
void *data;
|
||||
|
||||
nlh = ynl_msg_start(ys, id, flags);
|
||||
|
||||
memset(&gehdr, 0, sizeof(gehdr));
|
||||
gehdr.cmd = cmd;
|
||||
gehdr.version = version;
|
||||
|
||||
data = mnl_nlmsg_put_extra_header(nlh, sizeof(gehdr));
|
||||
memcpy(data, &gehdr, sizeof(gehdr));
|
||||
|
||||
return nlh;
|
||||
}
|
||||
|
||||
void ynl_msg_start_req(struct ynl_sock *ys, __u32 id)
|
||||
{
|
||||
ynl_msg_start(ys, id, NLM_F_REQUEST | NLM_F_ACK);
|
||||
}
|
||||
|
||||
void ynl_msg_start_dump(struct ynl_sock *ys, __u32 id)
|
||||
{
|
||||
ynl_msg_start(ys, id, NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP);
|
||||
}
|
||||
|
||||
struct nlmsghdr *
|
||||
ynl_gemsg_start_req(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version)
|
||||
{
|
||||
return ynl_gemsg_start(ys, id, NLM_F_REQUEST | NLM_F_ACK, cmd, version);
|
||||
}
|
||||
|
||||
struct nlmsghdr *
|
||||
ynl_gemsg_start_dump(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version)
|
||||
{
|
||||
return ynl_gemsg_start(ys, id, NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP,
|
||||
cmd, version);
|
||||
}
|
||||
|
||||
int ynl_recv_ack(struct ynl_sock *ys, int ret)
|
||||
{
|
||||
if (!ret) {
|
||||
yerr(ys, YNL_ERROR_EXPECT_ACK,
|
||||
"Expecting an ACK but nothing received");
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);
|
||||
if (ret < 0) {
|
||||
perr(ys, "Socket receive failed");
|
||||
return ret;
|
||||
}
|
||||
return mnl_cb_run(ys->rx_buf, ret, ys->seq, ys->portid,
|
||||
ynl_cb_null, ys);
|
||||
}
|
||||
|
||||
int ynl_cb_null(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
struct ynl_parse_arg *yarg = data;
|
||||
|
||||
yerr(yarg->ys, YNL_ERROR_UNEXPECT_MSG,
|
||||
"Received a message when none were expected");
|
||||
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
|
||||
/* Init/fini and genetlink boiler plate */
|
||||
static int
|
||||
ynl_get_family_info_mcast(struct ynl_sock *ys, const struct nlattr *mcasts)
|
||||
{
|
||||
const struct nlattr *entry, *attr;
|
||||
unsigned int i;
|
||||
|
||||
mnl_attr_for_each_nested(attr, mcasts)
|
||||
ys->n_mcast_groups++;
|
||||
|
||||
if (!ys->n_mcast_groups)
|
||||
return 0;
|
||||
|
||||
ys->mcast_groups = calloc(ys->n_mcast_groups,
|
||||
sizeof(*ys->mcast_groups));
|
||||
if (!ys->mcast_groups)
|
||||
return MNL_CB_ERROR;
|
||||
|
||||
i = 0;
|
||||
mnl_attr_for_each_nested(entry, mcasts) {
|
||||
mnl_attr_for_each_nested(attr, entry) {
|
||||
if (mnl_attr_get_type(attr) == CTRL_ATTR_MCAST_GRP_ID)
|
||||
ys->mcast_groups[i].id = mnl_attr_get_u32(attr);
|
||||
if (mnl_attr_get_type(attr) == CTRL_ATTR_MCAST_GRP_NAME) {
|
||||
strncpy(ys->mcast_groups[i].name,
|
||||
mnl_attr_get_str(attr),
|
||||
GENL_NAMSIZ - 1);
|
||||
ys->mcast_groups[i].name[GENL_NAMSIZ - 1] = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ynl_get_family_info_cb(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
struct ynl_parse_arg *yarg = data;
|
||||
struct ynl_sock *ys = yarg->ys;
|
||||
const struct nlattr *attr;
|
||||
bool found_id = true;
|
||||
|
||||
mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
|
||||
if (mnl_attr_get_type(attr) == CTRL_ATTR_MCAST_GROUPS)
|
||||
if (ynl_get_family_info_mcast(ys, attr))
|
||||
return MNL_CB_ERROR;
|
||||
|
||||
if (mnl_attr_get_type(attr) != CTRL_ATTR_FAMILY_ID)
|
||||
continue;
|
||||
|
||||
if (mnl_attr_get_payload_len(attr) != sizeof(__u16)) {
|
||||
yerr(ys, YNL_ERROR_ATTR_INVALID, "Invalid family ID");
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
|
||||
ys->family_id = mnl_attr_get_u16(attr);
|
||||
found_id = true;
|
||||
}
|
||||
|
||||
if (!found_id) {
|
||||
yerr(ys, YNL_ERROR_ATTR_MISSING, "Family ID missing");
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
return MNL_CB_OK;
|
||||
}
|
||||
|
||||
static int ynl_sock_read_family(struct ynl_sock *ys, const char *family_name)
|
||||
{
|
||||
struct ynl_parse_arg yarg = { .ys = ys, };
|
||||
struct nlmsghdr *nlh;
|
||||
int err;
|
||||
|
||||
nlh = ynl_gemsg_start_req(ys, GENL_ID_CTRL, CTRL_CMD_GETFAMILY, 1);
|
||||
mnl_attr_put_strz(nlh, CTRL_ATTR_FAMILY_NAME, family_name);
|
||||
|
||||
err = mnl_socket_sendto(ys->sock, nlh, nlh->nlmsg_len);
|
||||
if (err < 0) {
|
||||
perr(ys, "failed to request socket family info");
|
||||
return err;
|
||||
}
|
||||
|
||||
err = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);
|
||||
if (err <= 0) {
|
||||
perr(ys, "failed to receive the socket family info");
|
||||
return err;
|
||||
}
|
||||
err = mnl_cb_run2(ys->rx_buf, err, ys->seq, ys->portid,
|
||||
ynl_get_family_info_cb, &yarg,
|
||||
ynl_cb_array, ARRAY_SIZE(ynl_cb_array));
|
||||
if (err < 0) {
|
||||
free(ys->mcast_groups);
|
||||
perr(ys, "failed to receive the socket family info - no such family?");
|
||||
return err;
|
||||
}
|
||||
|
||||
return ynl_recv_ack(ys, err);
|
||||
}
|
||||
|
||||
struct ynl_sock *
|
||||
ynl_sock_create(const struct ynl_family *yf, struct ynl_error *yse)
|
||||
{
|
||||
struct ynl_sock *ys;
|
||||
int one = 1;
|
||||
|
||||
ys = malloc(sizeof(*ys) + 2 * MNL_SOCKET_BUFFER_SIZE);
|
||||
if (!ys)
|
||||
return NULL;
|
||||
memset(ys, 0, sizeof(*ys));
|
||||
|
||||
ys->family = yf;
|
||||
ys->tx_buf = &ys->raw_buf[0];
|
||||
ys->rx_buf = &ys->raw_buf[MNL_SOCKET_BUFFER_SIZE];
|
||||
ys->ntf_last_next = &ys->ntf_first;
|
||||
|
||||
ys->sock = mnl_socket_open(NETLINK_GENERIC);
|
||||
if (!ys->sock) {
|
||||
__perr(yse, "failed to create a netlink socket");
|
||||
goto err_free_sock;
|
||||
}
|
||||
|
||||
if (mnl_socket_setsockopt(ys->sock, NETLINK_CAP_ACK,
|
||||
&one, sizeof(one))) {
|
||||
__perr(yse, "failed to enable netlink ACK");
|
||||
goto err_close_sock;
|
||||
}
|
||||
if (mnl_socket_setsockopt(ys->sock, NETLINK_EXT_ACK,
|
||||
&one, sizeof(one))) {
|
||||
__perr(yse, "failed to enable netlink ext ACK");
|
||||
goto err_close_sock;
|
||||
}
|
||||
|
||||
ys->seq = random();
|
||||
ys->portid = mnl_socket_get_portid(ys->sock);
|
||||
|
||||
if (ynl_sock_read_family(ys, yf->name)) {
|
||||
if (yse)
|
||||
memcpy(yse, &ys->err, sizeof(*yse));
|
||||
goto err_close_sock;
|
||||
}
|
||||
|
||||
return ys;
|
||||
|
||||
err_close_sock:
|
||||
mnl_socket_close(ys->sock);
|
||||
err_free_sock:
|
||||
free(ys);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void ynl_sock_destroy(struct ynl_sock *ys)
|
||||
{
|
||||
struct ynl_ntf_base_type *ntf;
|
||||
|
||||
mnl_socket_close(ys->sock);
|
||||
while ((ntf = ynl_ntf_dequeue(ys)))
|
||||
ynl_ntf_free(ntf);
|
||||
free(ys->mcast_groups);
|
||||
free(ys);
|
||||
}
|
||||
|
||||
/* YNL multicast handling */
|
||||
|
||||
void ynl_ntf_free(struct ynl_ntf_base_type *ntf)
|
||||
{
|
||||
ntf->free(ntf);
|
||||
}
|
||||
|
||||
int ynl_subscribe(struct ynl_sock *ys, const char *grp_name)
|
||||
{
|
||||
unsigned int i;
|
||||
int err;
|
||||
|
||||
for (i = 0; i < ys->n_mcast_groups; i++)
|
||||
if (!strcmp(ys->mcast_groups[i].name, grp_name))
|
||||
break;
|
||||
if (i == ys->n_mcast_groups) {
|
||||
yerr(ys, ENOENT, "Multicast group '%s' not found", grp_name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
err = mnl_socket_setsockopt(ys->sock, NETLINK_ADD_MEMBERSHIP,
|
||||
&ys->mcast_groups[i].id,
|
||||
sizeof(ys->mcast_groups[i].id));
|
||||
if (err < 0) {
|
||||
perr(ys, "Subscribing to multicast group failed");
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ynl_socket_get_fd(struct ynl_sock *ys)
|
||||
{
|
||||
return mnl_socket_get_fd(ys->sock);
|
||||
}
|
||||
|
||||
struct ynl_ntf_base_type *ynl_ntf_dequeue(struct ynl_sock *ys)
|
||||
{
|
||||
struct ynl_ntf_base_type *ntf;
|
||||
|
||||
if (!ynl_has_ntf(ys))
|
||||
return NULL;
|
||||
|
||||
ntf = ys->ntf_first;
|
||||
ys->ntf_first = ntf->next;
|
||||
if (ys->ntf_last_next == &ntf->next)
|
||||
ys->ntf_last_next = &ys->ntf_first;
|
||||
|
||||
return ntf;
|
||||
}
|
||||
|
||||
static int ynl_ntf_parse(struct ynl_sock *ys, const struct nlmsghdr *nlh)
|
||||
{
|
||||
struct ynl_parse_arg yarg = { .ys = ys, };
|
||||
const struct ynl_ntf_info *info;
|
||||
struct ynl_ntf_base_type *rsp;
|
||||
struct genlmsghdr *gehdr;
|
||||
int ret;
|
||||
|
||||
gehdr = mnl_nlmsg_get_payload(nlh);
|
||||
if (gehdr->cmd >= ys->family->ntf_info_size)
|
||||
return MNL_CB_ERROR;
|
||||
info = &ys->family->ntf_info[gehdr->cmd];
|
||||
if (!info->cb)
|
||||
return MNL_CB_ERROR;
|
||||
|
||||
rsp = calloc(1, info->alloc_sz);
|
||||
rsp->free = info->free;
|
||||
yarg.data = rsp->data;
|
||||
yarg.rsp_policy = info->policy;
|
||||
|
||||
ret = info->cb(nlh, &yarg);
|
||||
if (ret <= MNL_CB_STOP)
|
||||
goto err_free;
|
||||
|
||||
rsp->family = nlh->nlmsg_type;
|
||||
rsp->cmd = gehdr->cmd;
|
||||
|
||||
*ys->ntf_last_next = rsp;
|
||||
ys->ntf_last_next = &rsp->next;
|
||||
|
||||
return MNL_CB_OK;
|
||||
|
||||
err_free:
|
||||
info->free(rsp);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
|
||||
static int ynl_ntf_trampoline(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
return ynl_ntf_parse((struct ynl_sock *)data, nlh);
|
||||
}
|
||||
|
||||
int ynl_ntf_check(struct ynl_sock *ys)
|
||||
{
|
||||
ssize_t len;
|
||||
int err;
|
||||
|
||||
do {
|
||||
/* libmnl doesn't let us pass flags to the recv to make
|
||||
* it non-blocking so we need to poll() or peek() :|
|
||||
*/
|
||||
struct pollfd pfd = { };
|
||||
|
||||
pfd.fd = mnl_socket_get_fd(ys->sock);
|
||||
pfd.events = POLLIN;
|
||||
err = poll(&pfd, 1, 1);
|
||||
if (err < 1)
|
||||
return err;
|
||||
|
||||
len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
|
||||
MNL_SOCKET_BUFFER_SIZE);
|
||||
if (len < 0)
|
||||
return len;
|
||||
|
||||
err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
|
||||
ynl_ntf_trampoline, ys,
|
||||
ynl_cb_array, NLMSG_MIN_TYPE);
|
||||
if (err < 0)
|
||||
return err;
|
||||
} while (err > 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* YNL specific helpers used by the auto-generated code */
|
||||
|
||||
struct ynl_dump_list_type *YNL_LIST_END = (void *)(0xb4d123);
|
||||
|
||||
void ynl_error_unknown_notification(struct ynl_sock *ys, __u8 cmd)
|
||||
{
|
||||
yerr(ys, YNL_ERROR_UNKNOWN_NTF,
|
||||
"Unknown notification message type '%d'", cmd);
|
||||
}
|
||||
|
||||
int ynl_error_parse(struct ynl_parse_arg *yarg, const char *msg)
|
||||
{
|
||||
yerr(yarg->ys, YNL_ERROR_INV_RESP, "Error parsing response: %s", msg);
|
||||
return MNL_CB_ERROR;
|
||||
}
|
||||
|
||||
static int
|
||||
ynl_check_alien(struct ynl_sock *ys, const struct nlmsghdr *nlh, __u32 rsp_cmd)
|
||||
{
|
||||
struct genlmsghdr *gehdr;
|
||||
|
||||
if (mnl_nlmsg_get_payload_len(nlh) < sizeof(*gehdr)) {
|
||||
yerr(ys, YNL_ERROR_INV_RESP,
|
||||
"Kernel responded with truncated message");
|
||||
return -1;
|
||||
}
|
||||
|
||||
gehdr = mnl_nlmsg_get_payload(nlh);
|
||||
if (gehdr->cmd != rsp_cmd)
|
||||
return ynl_ntf_parse(ys, nlh);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ynl_req_trampoline(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
struct ynl_req_state *yrs = data;
|
||||
int ret;
|
||||
|
||||
ret = ynl_check_alien(yrs->yarg.ys, nlh, yrs->rsp_cmd);
|
||||
if (ret)
|
||||
return ret < 0 ? MNL_CB_ERROR : MNL_CB_OK;
|
||||
|
||||
return yrs->cb(nlh, &yrs->yarg);
|
||||
}
|
||||
|
||||
int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
|
||||
struct ynl_req_state *yrs)
|
||||
{
|
||||
ssize_t len;
|
||||
int err;
|
||||
|
||||
err = mnl_socket_sendto(ys->sock, req_nlh, req_nlh->nlmsg_len);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
do {
|
||||
len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
|
||||
MNL_SOCKET_BUFFER_SIZE);
|
||||
if (len < 0)
|
||||
return len;
|
||||
|
||||
err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
|
||||
ynl_req_trampoline, yrs,
|
||||
ynl_cb_array, NLMSG_MIN_TYPE);
|
||||
if (err < 0)
|
||||
return err;
|
||||
} while (err > 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ynl_dump_trampoline(const struct nlmsghdr *nlh, void *data)
|
||||
{
|
||||
struct ynl_dump_state *ds = data;
|
||||
struct ynl_dump_list_type *obj;
|
||||
struct ynl_parse_arg yarg = {};
|
||||
int ret;
|
||||
|
||||
ret = ynl_check_alien(ds->ys, nlh, ds->rsp_cmd);
|
||||
if (ret)
|
||||
return ret < 0 ? MNL_CB_ERROR : MNL_CB_OK;
|
||||
|
||||
obj = calloc(1, ds->alloc_sz);
|
||||
if (!obj)
|
||||
return MNL_CB_ERROR;
|
||||
|
||||
if (!ds->first)
|
||||
ds->first = obj;
|
||||
if (ds->last)
|
||||
ds->last->next = obj;
|
||||
ds->last = obj;
|
||||
|
||||
yarg.ys = ds->ys;
|
||||
yarg.rsp_policy = ds->rsp_policy;
|
||||
yarg.data = &obj->data;
|
||||
|
||||
return ds->cb(nlh, &yarg);
|
||||
}
|
||||
|
||||
static void *ynl_dump_end(struct ynl_dump_state *ds)
|
||||
{
|
||||
if (!ds->first)
|
||||
return YNL_LIST_END;
|
||||
|
||||
ds->last->next = YNL_LIST_END;
|
||||
return ds->first;
|
||||
}
|
||||
|
||||
int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
|
||||
struct ynl_dump_state *yds)
|
||||
{
|
||||
ssize_t len;
|
||||
int err;
|
||||
|
||||
err = mnl_socket_sendto(ys->sock, req_nlh, req_nlh->nlmsg_len);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
do {
|
||||
len = mnl_socket_recvfrom(ys->sock, ys->rx_buf,
|
||||
MNL_SOCKET_BUFFER_SIZE);
|
||||
if (len < 0)
|
||||
goto err_close_list;
|
||||
|
||||
err = mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,
|
||||
ynl_dump_trampoline, yds,
|
||||
ynl_cb_array, NLMSG_MIN_TYPE);
|
||||
if (err < 0)
|
||||
goto err_close_list;
|
||||
} while (err > 0);
|
||||
|
||||
yds->first = ynl_dump_end(yds);
|
||||
return 0;
|
||||
|
||||
err_close_list:
|
||||
yds->first = ynl_dump_end(yds);
|
||||
return -1;
|
||||
}
|
||||
237
tools/net/ynl/lib/ynl.h
Normal file
237
tools/net/ynl/lib/ynl.h
Normal file
@ -0,0 +1,237 @@
|
||||
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
|
||||
#ifndef __YNL_C_H
|
||||
#define __YNL_C_H 1
|
||||
|
||||
#include <stddef.h>
|
||||
#include <libmnl/libmnl.h>
|
||||
#include <linux/genetlink.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
struct mnl_socket;
|
||||
struct nlmsghdr;
|
||||
|
||||
/*
|
||||
* User facing code
|
||||
*/
|
||||
|
||||
struct ynl_ntf_base_type;
|
||||
struct ynl_ntf_info;
|
||||
struct ynl_sock;
|
||||
|
||||
enum ynl_error_code {
|
||||
YNL_ERROR_NONE = 0,
|
||||
__YNL_ERRNO_END = 4096,
|
||||
YNL_ERROR_INTERNAL,
|
||||
YNL_ERROR_EXPECT_ACK,
|
||||
YNL_ERROR_EXPECT_MSG,
|
||||
YNL_ERROR_UNEXPECT_MSG,
|
||||
YNL_ERROR_ATTR_MISSING,
|
||||
YNL_ERROR_ATTR_INVALID,
|
||||
YNL_ERROR_UNKNOWN_NTF,
|
||||
YNL_ERROR_INV_RESP,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ynl_error - error encountered by YNL
|
||||
* @code: errno (low values) or YNL error code (enum ynl_error_code)
|
||||
* @attr_offs: offset of bad attribute (for very advanced users)
|
||||
* @msg: error message
|
||||
*
|
||||
* Error information for when YNL operations fail.
|
||||
* Users should interact with the err member of struct ynl_sock directly.
|
||||
* The main exception to that rule is ynl_sock_create().
|
||||
*/
|
||||
struct ynl_error {
|
||||
enum ynl_error_code code;
|
||||
unsigned int attr_offs;
|
||||
char msg[512];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ynl_family - YNL family info
|
||||
* Family description generated by codegen. Pass to ynl_sock_create().
|
||||
*/
|
||||
struct ynl_family {
|
||||
/* private: */
|
||||
const char *name;
|
||||
const struct ynl_ntf_info *ntf_info;
|
||||
unsigned int ntf_info_size;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ynl_sock - YNL wrapped netlink socket
|
||||
* @err: YNL error descriptor, cleared on every request.
|
||||
*/
|
||||
struct ynl_sock {
|
||||
struct ynl_error err;
|
||||
|
||||
/* private: */
|
||||
const struct ynl_family *family;
|
||||
struct mnl_socket *sock;
|
||||
__u32 seq;
|
||||
__u32 portid;
|
||||
__u16 family_id;
|
||||
|
||||
unsigned int n_mcast_groups;
|
||||
struct {
|
||||
unsigned int id;
|
||||
char name[GENL_NAMSIZ];
|
||||
} *mcast_groups;
|
||||
|
||||
struct ynl_ntf_base_type *ntf_first;
|
||||
struct ynl_ntf_base_type **ntf_last_next;
|
||||
|
||||
struct nlmsghdr *nlh;
|
||||
struct ynl_policy_nest *req_policy;
|
||||
unsigned char *tx_buf;
|
||||
unsigned char *rx_buf;
|
||||
unsigned char raw_buf[];
|
||||
};
|
||||
|
||||
struct ynl_sock *
|
||||
ynl_sock_create(const struct ynl_family *yf, struct ynl_error *e);
|
||||
void ynl_sock_destroy(struct ynl_sock *ys);
|
||||
|
||||
#define ynl_dump_foreach(dump, iter) \
|
||||
for (typeof(dump->obj) *iter = &dump->obj; \
|
||||
!ynl_dump_obj_is_last(iter); \
|
||||
iter = ynl_dump_obj_next(iter))
|
||||
|
||||
int ynl_subscribe(struct ynl_sock *ys, const char *grp_name);
|
||||
int ynl_socket_get_fd(struct ynl_sock *ys);
|
||||
int ynl_ntf_check(struct ynl_sock *ys);
|
||||
|
||||
/**
|
||||
* ynl_has_ntf() - check if socket has *parsed* notifications
|
||||
* @ys: active YNL socket
|
||||
*
|
||||
* Note that this does not take into account notifications sitting
|
||||
* in netlink socket, just the notifications which have already been
|
||||
* read and parsed (e.g. during a ynl_ntf_check() call).
|
||||
*/
|
||||
static inline bool ynl_has_ntf(struct ynl_sock *ys)
|
||||
{
|
||||
return ys->ntf_last_next != &ys->ntf_first;
|
||||
}
|
||||
struct ynl_ntf_base_type *ynl_ntf_dequeue(struct ynl_sock *ys);
|
||||
|
||||
void ynl_ntf_free(struct ynl_ntf_base_type *ntf);
|
||||
|
||||
/*
|
||||
* YNL internals / low level stuff
|
||||
*/
|
||||
|
||||
/* Generic mnl helper code */
|
||||
|
||||
enum ynl_policy_type {
|
||||
YNL_PT_REJECT = 1,
|
||||
YNL_PT_IGNORE,
|
||||
YNL_PT_NEST,
|
||||
YNL_PT_FLAG,
|
||||
YNL_PT_BINARY,
|
||||
YNL_PT_U8,
|
||||
YNL_PT_U16,
|
||||
YNL_PT_U32,
|
||||
YNL_PT_U64,
|
||||
YNL_PT_NUL_STR,
|
||||
};
|
||||
|
||||
struct ynl_policy_attr {
|
||||
enum ynl_policy_type type;
|
||||
unsigned int len;
|
||||
const char *name;
|
||||
struct ynl_policy_nest *nest;
|
||||
};
|
||||
|
||||
struct ynl_policy_nest {
|
||||
unsigned int max_attr;
|
||||
struct ynl_policy_attr *table;
|
||||
};
|
||||
|
||||
struct ynl_parse_arg {
|
||||
struct ynl_sock *ys;
|
||||
struct ynl_policy_nest *rsp_policy;
|
||||
void *data;
|
||||
};
|
||||
|
||||
struct ynl_dump_list_type {
|
||||
struct ynl_dump_list_type *next;
|
||||
unsigned char data[] __attribute__ ((aligned (8)));
|
||||
};
|
||||
extern struct ynl_dump_list_type *YNL_LIST_END;
|
||||
|
||||
static inline bool ynl_dump_obj_is_last(void *obj)
|
||||
{
|
||||
unsigned long uptr = (unsigned long)obj;
|
||||
|
||||
uptr -= offsetof(struct ynl_dump_list_type, data);
|
||||
return uptr == (unsigned long)YNL_LIST_END;
|
||||
}
|
||||
|
||||
static inline void *ynl_dump_obj_next(void *obj)
|
||||
{
|
||||
unsigned long uptr = (unsigned long)obj;
|
||||
struct ynl_dump_list_type *list;
|
||||
|
||||
uptr -= offsetof(struct ynl_dump_list_type, data);
|
||||
list = (void *)uptr;
|
||||
uptr = (unsigned long)list->next;
|
||||
uptr += offsetof(struct ynl_dump_list_type, data);
|
||||
|
||||
return (void *)uptr;
|
||||
}
|
||||
|
||||
struct ynl_ntf_base_type {
|
||||
__u16 family;
|
||||
__u8 cmd;
|
||||
struct ynl_ntf_base_type *next;
|
||||
void (*free)(struct ynl_ntf_base_type *ntf);
|
||||
unsigned char data[] __attribute__ ((aligned (8)));
|
||||
};
|
||||
|
||||
extern mnl_cb_t ynl_cb_array[NLMSG_MIN_TYPE];
|
||||
|
||||
struct nlmsghdr *
|
||||
ynl_gemsg_start_req(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
|
||||
struct nlmsghdr *
|
||||
ynl_gemsg_start_dump(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
|
||||
|
||||
int ynl_attr_validate(struct ynl_parse_arg *yarg, const struct nlattr *attr);
|
||||
|
||||
int ynl_recv_ack(struct ynl_sock *ys, int ret);
|
||||
int ynl_cb_null(const struct nlmsghdr *nlh, void *data);
|
||||
|
||||
/* YNL specific helpers used by the auto-generated code */
|
||||
|
||||
struct ynl_req_state {
|
||||
struct ynl_parse_arg yarg;
|
||||
mnl_cb_t cb;
|
||||
__u32 rsp_cmd;
|
||||
};
|
||||
|
||||
struct ynl_dump_state {
|
||||
struct ynl_sock *ys;
|
||||
struct ynl_policy_nest *rsp_policy;
|
||||
void *first;
|
||||
struct ynl_dump_list_type *last;
|
||||
size_t alloc_sz;
|
||||
mnl_cb_t cb;
|
||||
__u32 rsp_cmd;
|
||||
};
|
||||
|
||||
struct ynl_ntf_info {
|
||||
struct ynl_policy_nest *policy;
|
||||
mnl_cb_t cb;
|
||||
size_t alloc_sz;
|
||||
void (*free)(struct ynl_ntf_base_type *ntf);
|
||||
};
|
||||
|
||||
int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
|
||||
struct ynl_req_state *yrs);
|
||||
int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
|
||||
struct ynl_dump_state *yds);
|
||||
|
||||
void ynl_error_unknown_notification(struct ynl_sock *ys, __u8 cmd);
|
||||
int ynl_error_parse(struct ynl_parse_arg *yarg, const char *msg);
|
||||
|
||||
#endif
|
||||
@ -14,7 +14,7 @@ done
|
||||
|
||||
KDIR=$(dirname $(dirname $(dirname $(dirname $(realpath $0)))))
|
||||
|
||||
files=$(git grep --files-with-matches '^/\* YNL-GEN \(kernel\|uapi\)')
|
||||
files=$(git grep --files-with-matches '^/\* YNL-GEN \(kernel\|uapi\|user\)')
|
||||
for f in $files; do
|
||||
# params: 0 1 2 3
|
||||
# $YAML YNL-GEN kernel $mode
|
||||
|
||||
Loading…
Reference in New Issue
Block a user