Couldn't attach XDP program on iface 'eno6': Invalid argument(-22)

Question

Couldn't attach XDP program on iface 'eno6': Invalid argument(-22)

calvin2021y opened this issue a year ago · comments

calvin2021y commented a year ago

xdp-filter load eno6 -f tcp -vv

Current rlimit 16872067072 already >= minimum 1048576
Couldn't open pin directory /sys/fs/bpf/xdp-filter/programs/eno6: No such file or directory
Looking for eBPF program with features tcp,allow
Found prog 'xdpfilt_alw_tcp.o' matching feature set to be loaded on interface 'eno6'.
libxdp: Looking for '/usr/lib/bpf/xdpfilt_alw_tcp.o'
libxdp: Loading XDP program from '/usr/lib/bpf/xdpfilt_alw_tcp.o' section 'xdp_filter'
libbpf: loading /usr/lib/bpf/xdpfilt_alw_tcp.o
libbpf: elf: section(3) xdp_filter, size 2224, link 0, flags 6, type=1
libbpf: sec 'xdp_filter': found program 'xdpfilt_alw_tcp' at insn offset 0 (0 bytes), code size 278 insns (2224 bytes)
libbpf: elf: section(4) .relxdp_filter, size 48, link 28, flags 40, type=9
libbpf: elf: section(5) license, size 4, link 0, flags 3, type=1
libbpf: license of /usr/lib/bpf/xdpfilt_alw_tcp.o is GPL
libbpf: elf: section(6) features, size 4, link 0, flags 3, type=1
libbpf: elf: skipping unrecognized data section(6) features
libbpf: elf: section(7) .maps, size 80, link 0, flags 3, type=1
libbpf: elf: section(8) .xdp_run_config, size 16, link 0, flags 3, type=1
libbpf: elf: skipping unrecognized data section(8) .xdp_run_config
libbpf: elf: section(19) .BTF, size 2574, link 0, flags 0, type=1
libbpf: elf: section(21) .BTF.ext, size 1504, link 0, flags 0, type=1
libbpf: elf: section(28) .symtab, size 1272, link 1, flags 0, type=2
libbpf: looking for externs among 53 symbols...
libbpf: collected 0 externs total
libbpf: map 'xdp_stats_map': at sec_idx 7, offset 0.
libbpf: map 'xdp_stats_map': found type = 6.
libbpf: map 'xdp_stats_map': found key [8], sz = 4.
libbpf: map 'xdp_stats_map': found value [11], sz = 16.
libbpf: map 'xdp_stats_map': found max_entries = 5.
libbpf: map 'xdp_stats_map': found pinning = 1.
libbpf: map 'filter_ports': at sec_idx 7, offset 40.
libbpf: map 'filter_ports': found type = 6.
libbpf: map 'filter_ports': found key [8], sz = 4.
libbpf: map 'filter_ports': found value [12], sz = 8.
libbpf: map 'filter_ports': found max_entries = 65536.
libbpf: map 'filter_ports': found pinning = 1.
libbpf: prog 'xdpfilt_alw_tcp': unrecognized ELF section name 'xdp_filter'
libbpf: sec '.relxdp_filter': collecting relocation for section(3) 'xdp_filter'
libbpf: sec '.relxdp_filter': relo #0: insn #110 against 'filter_ports'
libbpf: prog 'xdpfilt_alw_tcp': found map 1 (filter_ports, sec 7, off 40) for insn #110
libbpf: sec '.relxdp_filter': relo #1: insn #122 against 'filter_ports'
libbpf: prog 'xdpfilt_alw_tcp': found map 1 (filter_ports, sec 7, off 40) for insn #122
libbpf: sec '.relxdp_filter': relo #2: insn #137 against 'xdp_stats_map'
libbpf: prog 'xdpfilt_alw_tcp': found map 0 (xdp_stats_map, sec 7, off 0) for insn #137
libxdp: Found func xdpfilt_alw_tcp matching xdpfilt_alw_tcp
libxdp: Generating multi-prog dispatcher for 1 programs
libxdp: Looking for '/usr/lib/bpf/xdp-dispatcher.o'
libxdp: Loading XDP program from '/usr/lib/bpf/xdp-dispatcher.o' section '(null)'
libbpf: loading /usr/lib/bpf/xdp-dispatcher.o
libbpf: elf: section(2) .text, size 528, link 0, flags 6, type=1
libbpf: sec '.text': found program 'prog0' at insn offset 0 (0 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog1' at insn offset 6 (48 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog2' at insn offset 12 (96 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog3' at insn offset 18 (144 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog4' at insn offset 24 (192 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog5' at insn offset 30 (240 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog6' at insn offset 36 (288 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog7' at insn offset 42 (336 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog8' at insn offset 48 (384 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog9' at insn offset 54 (432 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'compat_test' at insn offset 60 (480 bytes), code size 6 insns (48 bytes)
libbpf: elf: section(3) xdp, size 1200, link 0, flags 6, type=1
libbpf: sec 'xdp': found program 'xdp_dispatcher' at insn offset 0 (0 bytes), code size 148 insns (1184 bytes)
libbpf: sec 'xdp': found program 'xdp_pass' at insn offset 148 (1184 bytes), code size 2 insns (16 bytes)
libbpf: elf: section(4) .relxdp, size 336, link 27, flags 40, type=9
libbpf: elf: section(5) .rodata, size 84, link 0, flags 2, type=1
libbpf: elf: section(6) license, size 4, link 0, flags 3, type=1
libbpf: license of /usr/lib/bpf/xdp-dispatcher.o is GPL
libbpf: elf: section(7) xdp_metadata, size 8, link 0, flags 3, type=1
libbpf: elf: skipping unrecognized data section(7) xdp_metadata
libbpf: elf: section(18) .BTF, size 3212, link 0, flags 0, type=1
libbpf: elf: section(20) .BTF.ext, size 2112, link 0, flags 0, type=1
libbpf: elf: section(27) .symtab, size 1008, link 1, flags 0, type=2
libbpf: looking for externs among 42 symbols...
libbpf: collected 0 externs total
libbpf: map 'xdp_disp.rodata' (global data): at sec_idx 5, offset 0, flags 480.
libbpf: map 0 is "xdp_disp.rodata"
libbpf: sec '.relxdp': collecting relocation for section(3) 'xdp'
libbpf: sec '.relxdp': relo #0: insn #2 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 2
libbpf: sec '.relxdp': relo #1: insn #7 against 'prog0'
libbpf: sec '.relxdp': relo #2: insn #19 against 'prog1'
libbpf: sec '.relxdp': relo #3: insn #20 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 20
libbpf: sec '.relxdp': relo #4: insn #33 against 'prog2'
libbpf: sec '.relxdp': relo #5: insn #34 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 34
libbpf: sec '.relxdp': relo #6: insn #47 against 'prog3'
libbpf: sec '.relxdp': relo #7: insn #48 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 48
libbpf: sec '.relxdp': relo #8: insn #61 against 'prog4'
libbpf: sec '.relxdp': relo #9: insn #62 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 62
libbpf: sec '.relxdp': relo #10: insn #75 against 'prog5'
libbpf: sec '.relxdp': relo #11: insn #76 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 76
libbpf: sec '.relxdp': relo #12: insn #89 against 'prog6'
libbpf: sec '.relxdp': relo #13: insn #90 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 90
libbpf: sec '.relxdp': relo #14: insn #103 against 'prog7'
libbpf: sec '.relxdp': relo #15: insn #104 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 104
libbpf: sec '.relxdp': relo #16: insn #117 against 'prog8'
libbpf: sec '.relxdp': relo #17: insn #118 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 118
libbpf: sec '.relxdp': relo #18: insn #131 against 'prog9'
libbpf: sec '.relxdp': relo #19: insn #132 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 132
libbpf: sec '.relxdp': relo #20: insn #145 against 'compat_test'
libxdp: DATASEC '.xdp_run_config' not found.
libxdp: Verified XDP dispatcher version 1 <= 1
libxdp: Loading multiprog dispatcher for 1 programs
libbpf: map 'xdp_disp.rodata': created successfully, fd=5
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog0'
libbpf: prog 'xdp_dispatcher': insn #7 relocated, imm 140 points to subprog 'prog0' (now at 148 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog1'
libbpf: prog 'xdp_dispatcher': insn #19 relocated, imm 134 points to subprog 'prog1' (now at 154 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog2'
libbpf: prog 'xdp_dispatcher': insn #33 relocated, imm 126 points to subprog 'prog2' (now at 160 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog3'
libbpf: prog 'xdp_dispatcher': insn #47 relocated, imm 118 points to subprog 'prog3' (now at 166 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog4'
libbpf: prog 'xdp_dispatcher': insn #61 relocated, imm 110 points to subprog 'prog4' (now at 172 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog5'
libbpf: prog 'xdp_dispatcher': insn #75 relocated, imm 102 points to subprog 'prog5' (now at 178 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog6'
libbpf: prog 'xdp_dispatcher': insn #89 relocated, imm 94 points to subprog 'prog6' (now at 184 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog7'
libbpf: prog 'xdp_dispatcher': insn #103 relocated, imm 86 points to subprog 'prog7' (now at 190 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog8'
libbpf: prog 'xdp_dispatcher': insn #117 relocated, imm 78 points to subprog 'prog8' (now at 196 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog9'
libbpf: prog 'xdp_dispatcher': insn #131 relocated, imm 70 points to subprog 'prog9' (now at 202 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'compat_test'
libbpf: prog 'xdp_dispatcher': insn #145 relocated, imm 62 points to subprog 'compat_test' (now at 208 offset)
libxdp: Loaded XDP program xdp_dispatcher, got fd 6
libxdp: Checking dispatcher compatibility
libxdp: Looking for '/usr/lib/bpf/xdp-dispatcher.o'
libxdp: Loading XDP program from '/usr/lib/bpf/xdp-dispatcher.o' section '(null)'
libbpf: loading /usr/lib/bpf/xdp-dispatcher.o
libbpf: elf: section(2) .text, size 528, link 0, flags 6, type=1
libbpf: sec '.text': found program 'prog0' at insn offset 0 (0 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog1' at insn offset 6 (48 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog2' at insn offset 12 (96 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog3' at insn offset 18 (144 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog4' at insn offset 24 (192 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog5' at insn offset 30 (240 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog6' at insn offset 36 (288 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog7' at insn offset 42 (336 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog8' at insn offset 48 (384 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'prog9' at insn offset 54 (432 bytes), code size 6 insns (48 bytes)
libbpf: sec '.text': found program 'compat_test' at insn offset 60 (480 bytes), code size 6 insns (48 bytes)
libbpf: elf: section(3) xdp, size 1200, link 0, flags 6, type=1
libbpf: sec 'xdp': found program 'xdp_dispatcher' at insn offset 0 (0 bytes), code size 148 insns (1184 bytes)
libbpf: sec 'xdp': found program 'xdp_pass' at insn offset 148 (1184 bytes), code size 2 insns (16 bytes)
libbpf: elf: section(4) .relxdp, size 336, link 27, flags 40, type=9
libbpf: elf: section(5) .rodata, size 84, link 0, flags 2, type=1
libbpf: elf: section(6) license, size 4, link 0, flags 3, type=1
libbpf: license of /usr/lib/bpf/xdp-dispatcher.o is GPL
libbpf: elf: section(7) xdp_metadata, size 8, link 0, flags 3, type=1
libbpf: elf: skipping unrecognized data section(7) xdp_metadata
libbpf: elf: section(18) .BTF, size 3212, link 0, flags 0, type=1
libbpf: elf: section(20) .BTF.ext, size 2112, link 0, flags 0, type=1
libbpf: elf: section(27) .symtab, size 1008, link 1, flags 0, type=2
libbpf: looking for externs among 42 symbols...
libbpf: collected 0 externs total
libbpf: map 'xdp_disp.rodata' (global data): at sec_idx 5, offset 0, flags 480.
libbpf: map 0 is "xdp_disp.rodata"
libbpf: sec '.relxdp': collecting relocation for section(3) 'xdp'
libbpf: sec '.relxdp': relo #0: insn #2 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 2
libbpf: sec '.relxdp': relo #1: insn #7 against 'prog0'
libbpf: sec '.relxdp': relo #2: insn #19 against 'prog1'
libbpf: sec '.relxdp': relo #3: insn #20 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 20
libbpf: sec '.relxdp': relo #4: insn #33 against 'prog2'
libbpf: sec '.relxdp': relo #5: insn #34 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 34
libbpf: sec '.relxdp': relo #6: insn #47 against 'prog3'
libbpf: sec '.relxdp': relo #7: insn #48 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 48
libbpf: sec '.relxdp': relo #8: insn #61 against 'prog4'
libbpf: sec '.relxdp': relo #9: insn #62 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 62
libbpf: sec '.relxdp': relo #10: insn #75 against 'prog5'
libbpf: sec '.relxdp': relo #11: insn #76 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 76
libbpf: sec '.relxdp': relo #12: insn #89 against 'prog6'
libbpf: sec '.relxdp': relo #13: insn #90 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 90
libbpf: sec '.relxdp': relo #14: insn #103 against 'prog7'
libbpf: sec '.relxdp': relo #15: insn #104 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 104
libbpf: sec '.relxdp': relo #16: insn #117 against 'prog8'
libbpf: sec '.relxdp': relo #17: insn #118 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 118
libbpf: sec '.relxdp': relo #18: insn #131 against 'prog9'
libbpf: sec '.relxdp': relo #19: insn #132 against '.rodata'
libbpf: prog 'xdp_dispatcher': found data map 0 (xdp_disp.rodata, sec 5, off 0) for insn 132
libbpf: sec '.relxdp': relo #20: insn #145 against 'compat_test'
libxdp: DATASEC '.xdp_run_config' not found.
libbpf: map 'xdp_disp.rodata': created successfully, fd=10
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog0'
libbpf: prog 'xdp_dispatcher': insn #7 relocated, imm 140 points to subprog 'prog0' (now at 148 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog1'
libbpf: prog 'xdp_dispatcher': insn #19 relocated, imm 134 points to subprog 'prog1' (now at 154 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog2'
libbpf: prog 'xdp_dispatcher': insn #33 relocated, imm 126 points to subprog 'prog2' (now at 160 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog3'
libbpf: prog 'xdp_dispatcher': insn #47 relocated, imm 118 points to subprog 'prog3' (now at 166 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog4'
libbpf: prog 'xdp_dispatcher': insn #61 relocated, imm 110 points to subprog 'prog4' (now at 172 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog5'
libbpf: prog 'xdp_dispatcher': insn #75 relocated, imm 102 points to subprog 'prog5' (now at 178 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog6'
libbpf: prog 'xdp_dispatcher': insn #89 relocated, imm 94 points to subprog 'prog6' (now at 184 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog7'
libbpf: prog 'xdp_dispatcher': insn #103 relocated, imm 86 points to subprog 'prog7' (now at 190 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog8'
libbpf: prog 'xdp_dispatcher': insn #117 relocated, imm 78 points to subprog 'prog8' (now at 196 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'prog9'
libbpf: prog 'xdp_dispatcher': insn #131 relocated, imm 70 points to subprog 'prog9' (now at 202 offset)
libbpf: prog 'xdp_dispatcher': added 6 insns from sub-prog 'compat_test'
libbpf: prog 'xdp_dispatcher': insn #145 relocated, imm 62 points to subprog 'compat_test' (now at 208 offset)
libxdp: Loaded XDP program xdp_pass, got fd 12
libxdp: Acquired lock from /sys/fs/bpf/xdp with fd 15
libxdp: Released lock fd 15
libxdp: Linking prog xdpfilt_alw_tcp as multiprog entry 0
libbpf: reused pinned map at '/sys/fs/bpf/xdp-filter/xdp_stats_map'
libbpf: map 'xdp_stats_map': skipping creation (preset fd=11)
libbpf: reused pinned map at '/sys/fs/bpf/xdp-filter/filter_ports'
libbpf: map 'filter_ports': skipping creation (preset fd=12)
libxdp: Loaded XDP program xdpfilt_alw_tcp, got fd 10
libxdp: Found func xdpfilt_alw_tcp matching xdpfilt_alw_tcp
libxdp: Attached prog 'xdpfilt_alw_tcp' with priority 10 in dispatcher entry 'prog0' with fd 15
libxdp: Acquired lock from /sys/fs/bpf/xdp with fd 16
libxdp: Pinning multiprog fd 8 beneath /sys/fs/bpf/xdp/dispatch-5-171
libxdp: Pinned link for prog xdpfilt_alw_tcp at /sys/fs/bpf/xdp/dispatch-5-171/prog0-link
libxdp: Pinned prog xdpfilt_alw_tcp at /sys/fs/bpf/xdp/dispatch-5-171/prog0-prog
libxdp: Released lock fd 16
libxdp: Replacing XDP fd -1 with 8 on ifindex 5
libxdp: Error attaching XDP program to ifindex 5: Invalid argument
libxdp: Failed to attach dispatcher on ifindex 5: Invalid argument
libxdp: Acquired lock from /sys/fs/bpf/xdp with fd 16
libxdp: Unpinning multiprog fd 8 beneath /sys/fs/bpf/xdp/dispatch-5-171
libxdp: Unpinned link for prog xdpfilt_alw_tcp from /sys/fs/bpf/xdp/dispatch-5-171/prog0-link
libxdp: Unpinned prog xdpfilt_alw_tcp from /sys/fs/bpf/xdp/dispatch-5-171/prog0-prog
libxdp: Removed pin directory /sys/fs/bpf/xdp/dispatch-5-171
libxdp: Released lock fd 16
Couldn't attach XDP program on iface 'eno6': Invalid argument(-22)

Toke Høiland-Jørgensen · Answer 1 · Tue May 30 2023 23:32:45 GMT+0800 (China Standard Time)

What driver is the device you're trying to load on using, and which kernel version?

calvin2021y · Answer 2 · Wed May 31 2023 19:07:25 GMT+0800 (China Standard Time)

debian12 6.1.27 #8, ixgbevf for intel X550

Toke Høiland-Jørgensen · Answer 3 · Wed May 31 2023 19:41:29 GMT+0800 (China Standard Time)

Hmm, are you using a large MTU by any chance?

calvin2021y · Answer 4 · Thu Jun 01 2023 13:56:04 GMT+0800 (China Standard Time)

Yes, I use 9000 mtu.

Toke Høiland-Jørgensen · Answer 5 · Thu Jun 01 2023 19:54:09 GMT+0800 (China Standard Time)

Right, the ixgbevf driver doesn't support XDP with big MTU sizes, so that's why you're seeing the error...

calvin2021y · Answer 6 · Thu Jun 01 2023 22:03:51 GMT+0800 (China Standard Time)

any work around for this limit ? I can accept a certain performance penalty but want keep large MTU.

I want add source ip and dst ip limit for the device with large MTU.

int bpf_load(const char *path, const char *fn, int ifindex) {
    struct bpf_object *obj = NULL;
    struct bpf_program *prog = NULL;
	struct bpf_link *link = NULL;
	struct bpf_insn *insns = NULL;
	LIBBPF_OPTS(bpf_xdp_attach_opts, opts);
	size_t insns_cnt;
	int errn0 =0;
	int line  =0;
	switch(1) default : {
		obj = bpf_object__open_file(path, NULL);
		if( obj == NULL ) {
			line = __LINE__;
			break;
		}
		prog = bpf_object__find_program_by_name(obj, fn);
	    if ( prog == NULL ) {
			line = __LINE__;
			break;
	    }
		errn0 = bpf_program__set_type(prog, BPF_PROG_TYPE_XDP);
	    if ( errn0 < 0 ) {
			line = __LINE__;
			break;
	    }
		int prog_fd = bpf_program__fd(prog);
		if( prog_fd < 0 ){
			errn0 = prog_fd;
			line = __LINE__;
			break;
		}
		errn0 = bpf_xdp_attach(ifindex, prog_fd, XDP_FLAGS_UPDATE_IF_NOEXIST, &opts);
	    if ( errn0 < 0 ) {
			line = __LINE__;
			break;
	    }
		// errn0 = bpf_prog_load();
	    if ( errn0 < 0 ) {
			line = __LINE__;
			break;
	    }
	}
	return line;
}

I try use libbpf do the work, I guess if call bpf_xdp_attach will no need call bpf_prog_load?

Toke Høiland-Jørgensen · Answer 7 · Thu Jun 01 2023 22:32:22 GMT+0800 (China Standard Time)

calvin2021y ***@***.***> writes:

any work around for this limit ? I can accept a certain performance penalty.

'fraid not. There are other drivers that have gained support for XDP with large MTU, so you could replace the hardware? Or just use something other than XDP...

calvin2021y · Answer 8 · Sat Jun 03 2023 00:45:33 GMT+0800 (China Standard Time)

If I rebuild the kernel with CONFIG_PAGE_SIZE_16KB, can I use 9000 MTU for ixgbe ?

I can not change the hardware, is there a software solution to allow large MTU with this NIC ?

Toke Høiland-Jørgensen · Answer 9 · Sat Jun 03 2023 01:32:57 GMT+0800 (China Standard Time)

calvin2021y ***@***.***> writes:

If I rebuild the kernel with `CONFIG_PAGE_SIZE_16KB`, can I use 9000 MTU for ixgbe ?

Nope, doesn't look like that will help. See: https://elixir.bootlin.com/linux/latest/source/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c#L4440 and https://elixir.bootlin.com/linux/latest/source/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h#L186

Toke Høiland-Jørgensen · Answer 10 · Thu Jun 29 2023 19:50:02 GMT+0800 (China Standard Time)

Closing this issue as resolved