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| author | Denis Salopek <denis.salopek@sartura.hr> | 2021-05-12 00:00:04 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-05-24 23:30:26 +0300 |
| commit | 3e87f192b405960c0fe83e0925bd0dadf4f8cf43 (patch) | |
| tree | ab5d250191d057ff1d0a166c400334df841505e3 /tools/include/uapi | |
| parent | f9bceaa59c5c47a8a08f48e19cbe887e500a1978 (diff) | |
| download | linux-3e87f192b405960c0fe83e0925bd0dadf4f8cf43.tar.xz | |
bpf: Add lookup_and_delete_elem support to hashtab
Extend the existing bpf_map_lookup_and_delete_elem() functionality to
hashtab map types, in addition to stacks and queues.
Create a new hashtab bpf_map_ops function that does lookup and deletion
of the element under the same bucket lock and add the created map_ops to
bpf.h.
Signed-off-by: Denis Salopek <denis.salopek@sartura.hr>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/4d18480a3e990ffbf14751ddef0325eed3be2966.1620763117.git.denis.salopek@sartura.hr
Diffstat (limited to 'tools/include/uapi')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 418b9b813d65..562adeac1d67 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -527,6 +527,15 @@ union bpf_iter_link_info { * Look up an element with the given *key* in the map referred to * by the file descriptor *fd*, and if found, delete the element. * + * For **BPF_MAP_TYPE_QUEUE** and **BPF_MAP_TYPE_STACK** map + * types, the *flags* argument needs to be set to 0, but for other + * map types, it may be specified as: + * + * **BPF_F_LOCK** + * Look up and delete the value of a spin-locked map + * without returning the lock. This must be specified if + * the elements contain a spinlock. + * * The **BPF_MAP_TYPE_QUEUE** and **BPF_MAP_TYPE_STACK** map types * implement this command as a "pop" operation, deleting the top * element rather than one corresponding to *key*. @@ -536,6 +545,10 @@ union bpf_iter_link_info { * This command is only valid for the following map types: * * **BPF_MAP_TYPE_QUEUE** * * **BPF_MAP_TYPE_STACK** + * * **BPF_MAP_TYPE_HASH** + * * **BPF_MAP_TYPE_PERCPU_HASH** + * * **BPF_MAP_TYPE_LRU_HASH** + * * **BPF_MAP_TYPE_LRU_PERCPU_HASH** * * Return * Returns zero on success. On error, -1 is returned and *errno* |