| Message ID | cover.1734119028.git.dxu@dxuuu.xyz (mailing list archive) |
|---|---|
| Headers | show |
| Series | bpftool: btf: Support dumping a single type from file | expand |
Hello: This series was applied to bpf/bpf-next.git (master) by Andrii Nakryiko <andrii@kernel.org>: On Fri, 13 Dec 2024 12:44:08 -0700 you wrote: > Some projects, for example xdp-tools [0], prefer to check in a minimized > vmlinux.h rather than the complete file which can get rather large. > > However, when you try to add a minimized version of a complex struct (eg > struct xfrm_state), things can get quite complex if you're trying to > manually untangle and deduplicate the dependencies. > > [...] Here is the summary with links: - [bpf-next,v5,1/4] bpftool: man: Add missing format argument to command description https://git.kernel.org/bpf/bpf-next/c/5e3ad22d8223 - [bpf-next,v5,2/4] bpftool: btf: Validate root_type_ids early https://git.kernel.org/bpf/bpf-next/c/7f5819e1ace8 - [bpf-next,v5,3/4] bpftool: btf: Support dumping a specific types from file https://git.kernel.org/bpf/bpf-next/c/a812d92ed2ae - [bpf-next,v5,4/4] bpftool: bash: Add bash completion for root_id argument https://git.kernel.org/bpf/bpf-next/c/9d294f698678 You are awesome, thank you!
Some projects, for example xdp-tools [0], prefer to check in a minimized vmlinux.h rather than the complete file which can get rather large. However, when you try to add a minimized version of a complex struct (eg struct xfrm_state), things can get quite complex if you're trying to manually untangle and deduplicate the dependencies. This commit teaches bpftool to do a minimized dump of a single type by providing an optional root_id argument. Example usage: $ ./bpftool btf dump file ~/dev/linux/vmlinux | rg "STRUCT 'xfrm_state'" [12643] STRUCT 'xfrm_state' size=912 vlen=58 $ ./bpftool btf dump file ~/dev/linux/vmlinux root_id 12643 format c #ifndef __VMLINUX_H__ #define __VMLINUX_H__ [..] struct xfrm_type_offload; struct xfrm_sec_ctx; struct xfrm_state { possible_net_t xs_net; union { struct hlist_node gclist; struct hlist_node bydst; }; union { struct hlist_node dev_gclist; struct hlist_node bysrc; }; struct hlist_node byspi; [..] [0]: https://github.com/xdp-project/xdp-tools/blob/master/headers/bpf/vmlinux.h === Changelog === Changes in v5: * Update bash-completion to support repeating root_id * Update man page to mention root_id NAND map key/value/kv/all Changes in v4: * Support multiple instances of root_id Changes in v3: * Make `root_id` a top level btf-dump argument rather than attached to `file` * Update bash completion script * Refactor root_type_ids checking to after btf handle creation * Update help messages and fix existing man page inconsistency Changes in v2: * Add early error check for invalid BTF ID Daniel Xu (4): bpftool: man: Add missing format argument to command description bpftool: btf: Validate root_type_ids early bpftool: btf: Support dumping a specific types from file bpftool: bash: Add bash completion for root_id argument .../bpf/bpftool/Documentation/bpftool-btf.rst | 9 +++- tools/bpf/bpftool/bash-completion/bpftool | 7 ++- tools/bpf/bpftool/btf.c | 51 ++++++++++++++++++- 3 files changed, 62 insertions(+), 5 deletions(-)