| Message ID | 20210302171947.2268128-4-joe@cilium.io (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | BPF |
| Headers | show |
| Series | Improve BPF syscall command documentation | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for bpf-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | warning | 7 maintainers not CCed: yhs@fb.com netdev@vger.kernel.org john.fastabend@gmail.com kpsingh@kernel.org songliubraving@fb.com kafai@fb.com andrii@kernel.org |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 11835 this patch: 11835 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 22 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 12482 this patch: 12482 |
| netdev/header_inline | success | Link |
| netdev/stable | success | Stable not CCed |
On 3/2/21 9:19 AM, Joe Stringer wrote: > Document the meaning of the BPF_F_LOCK flag for the map lookup/update > descriptions. Based on commit 96049f3afd50 ("bpf: introduce BPF_F_LOCK > flag"). > > Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> > Reviewed-by: Quentin Monnet <quentin@isovalent.com> > Signed-off-by: Joe Stringer <joe@cilium.io> > --- > CC: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com>
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 052bbfe65f77..eb9f059f0569 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -123,6 +123,14 @@ union bpf_iter_link_info { * Look up an element with a given *key* in the map referred to * by the file descriptor *map_fd*. * + * The *flags* argument may be specified as one of the + * following: + * + * **BPF_F_LOCK** + * Look up the value of a spin-locked map without + * returning the lock. This must be specified if the + * elements contain a spinlock. + * * Return * Returns zero on success. On error, -1 is returned and *errno* * is set appropriately. @@ -140,6 +148,8 @@ union bpf_iter_link_info { * Create a new element only if it did not exist. * **BPF_EXIST** * Update an existing element. + * **BPF_F_LOCK** + * Update a spin_lock-ed map element. * * Return * Returns zero on success. On error, -1 is returned and *errno*
Document the meaning of the BPF_F_LOCK flag for the map lookup/update descriptions. Based on commit 96049f3afd50 ("bpf: introduce BPF_F_LOCK flag"). Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Reviewed-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Joe Stringer <joe@cilium.io> --- CC: Alexei Starovoitov <ast@kernel.org> --- include/uapi/linux/bpf.h | 10 ++++++++++ 1 file changed, 10 insertions(+)