42984d7c1e
This patch adds a couple of stand-alone examples on how BPF_OBJ_PIN and BPF_OBJ_GET commands can be used. Example with maps: # ./fds_example -F /sys/fs/bpf/m -P -m -k 1 -v 42 bpf: map fd:3 (Success) bpf: pin ret:(0,Success) bpf: fd:3 u->(1:42) ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m -G -m -k 1 bpf: get fd:3 (Success) bpf: fd:3 l->(1):42 ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m -G -m -k 1 -v 24 bpf: get fd:3 (Success) bpf: fd:3 u->(1:24) ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m -G -m -k 1 bpf: get fd:3 (Success) bpf: fd:3 l->(1):24 ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m2 -P -m bpf: map fd:3 (Success) bpf: pin ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m2 -G -m -k 1 bpf: get fd:3 (Success) bpf: fd:3 l->(1):0 ret:(0,Success) # ./fds_example -F /sys/fs/bpf/m2 -G -m bpf: get fd:3 (Success) Example with progs: # ./fds_example -F /sys/fs/bpf/p -P -p bpf: prog fd:3 (Success) bpf: pin ret:(0,Success) bpf sock:4 <- fd:3 attached ret:(0,Success) # ./fds_example -F /sys/fs/bpf/p -G -p bpf: get fd:3 (Success) bpf: sock:4 <- fd:3 attached ret:(0,Success) # ./fds_example -F /sys/fs/bpf/p2 -P -p -o ./sockex1_kern.o bpf: prog fd:5 (Success) bpf: pin ret:(0,Success) bpf: sock:3 <- fd:5 attached ret:(0,Success) # ./fds_example -F /sys/fs/bpf/p2 -G -p bpf: get fd:3 (Success) bpf: sock:4 <- fd:3 attached ret:(0,Success) Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
77 lines
2.5 KiB
Makefile
77 lines
2.5 KiB
Makefile
# kbuild trick to avoid linker error. Can be omitted if a module is built.
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obj- := dummy.o
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# List of programs to build
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hostprogs-y := test_verifier test_maps
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hostprogs-y += sock_example
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hostprogs-y += fds_example
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hostprogs-y += sockex1
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hostprogs-y += sockex2
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hostprogs-y += sockex3
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hostprogs-y += tracex1
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hostprogs-y += tracex2
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hostprogs-y += tracex3
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hostprogs-y += tracex4
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hostprogs-y += tracex5
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hostprogs-y += tracex6
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hostprogs-y += trace_output
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hostprogs-y += lathist
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test_verifier-objs := test_verifier.o libbpf.o
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test_maps-objs := test_maps.o libbpf.o
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sock_example-objs := sock_example.o libbpf.o
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fds_example-objs := bpf_load.o libbpf.o fds_example.o
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sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
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sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
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sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
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tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
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tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
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tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
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tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
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tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
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tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
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trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
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lathist-objs := bpf_load.o libbpf.o lathist_user.o
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# Tell kbuild to always build the programs
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always := $(hostprogs-y)
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always += sockex1_kern.o
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always += sockex2_kern.o
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always += sockex3_kern.o
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always += tracex1_kern.o
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always += tracex2_kern.o
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always += tracex3_kern.o
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always += tracex4_kern.o
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always += tracex5_kern.o
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always += tracex6_kern.o
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always += trace_output_kern.o
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always += tcbpf1_kern.o
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always += lathist_kern.o
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HOSTCFLAGS += -I$(objtree)/usr/include
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HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
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HOSTLOADLIBES_fds_example += -lelf
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HOSTLOADLIBES_sockex1 += -lelf
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HOSTLOADLIBES_sockex2 += -lelf
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HOSTLOADLIBES_sockex3 += -lelf
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HOSTLOADLIBES_tracex1 += -lelf
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HOSTLOADLIBES_tracex2 += -lelf
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HOSTLOADLIBES_tracex3 += -lelf
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HOSTLOADLIBES_tracex4 += -lelf -lrt
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HOSTLOADLIBES_tracex5 += -lelf
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HOSTLOADLIBES_tracex6 += -lelf
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HOSTLOADLIBES_trace_output += -lelf -lrt
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HOSTLOADLIBES_lathist += -lelf
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# point this to your LLVM backend with bpf support
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LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc
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$(obj)/%.o: $(src)/%.c
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clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
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-D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
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-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
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clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
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-D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
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-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=asm -o $@.s
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