mirror/libbpf
1
0
Fork 0
mirror of https://github.com/netdata/libbpf.git synced 2026-03-27 19:59:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

libbpf: Add libbpf support to batch ops

Browse Source 
Added four libbpf API functions to support map batch operations:
  . int bpf_map_delete_batch( ... )
  . int bpf_map_lookup_batch( ... )
  . int bpf_map_lookup_and_delete_batch( ... )
  . int bpf_map_update_batch( ... )

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200115184308.162644-8-brianvv@google.com
This commit is contained in:
Yonghong Song
2020-01-15 10:43:06 -08:00
committed by Andrii Nakryiko
parent 1e51491d05
commit d91f681d3b
3 changed files with 84 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
src/bpf.c
View File

@@ -452,6 +452,64 @@ int bpf_map_freeze(int fd)
return sys_bpf(BPF_MAP_FREEZE, &attr, sizeof(attr));
}
static int bpf_map_batch_common(int cmd, int fd, void *in_batch,
void *out_batch, void *keys, void *values,
__u32 *count,
const struct bpf_map_batch_opts *opts)
{
union bpf_attr attr = {};
int ret;
if (!OPTS_VALID(opts, bpf_map_batch_opts))
return -EINVAL;
memset(&attr, 0, sizeof(attr));
attr.batch.map_fd = fd;
attr.batch.in_batch = ptr_to_u64(in_batch);
attr.batch.out_batch = ptr_to_u64(out_batch);
attr.batch.keys = ptr_to_u64(keys);
attr.batch.values = ptr_to_u64(values);
attr.batch.count = *count;
attr.batch.elem_flags = OPTS_GET(opts, elem_flags, 0);
attr.batch.flags = OPTS_GET(opts, flags, 0);
ret = sys_bpf(cmd, &attr, sizeof(attr));
*count = attr.batch.count;
return ret;
}
int bpf_map_delete_batch(int fd, void *keys, __u32 *count,
const struct bpf_map_batch_opts *opts)
{
return bpf_map_batch_common(BPF_MAP_DELETE_BATCH, fd, NULL,
NULL, keys, NULL, count, opts);
}
int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, void *keys,
void *values, __u32 *count,
const struct bpf_map_batch_opts *opts)
{
return bpf_map_batch_common(BPF_MAP_LOOKUP_BATCH, fd, in_batch,
out_batch, keys, values, count, opts);
}
int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, void *out_batch,
void *keys, void *values, __u32 *count,
const struct bpf_map_batch_opts *opts)
{
return bpf_map_batch_common(BPF_MAP_LOOKUP_AND_DELETE_BATCH,
fd, in_batch, out_batch, keys, values,
count, opts);
}
int bpf_map_update_batch(int fd, void *keys, void *values, __u32 *count,
const struct bpf_map_batch_opts *opts)
{
return bpf_map_batch_common(BPF_MAP_UPDATE_BATCH, fd, NULL, NULL,
keys, values, count, opts);
}
int bpf_obj_pin(int fd, const char *pathname)
{
union bpf_attr attr;