Now, the binary objects may be retrieved by id/name. It would require for future qmp commands that may require specific eBPF blob.
Signed-off-by: Andrew Melnychenko <and...@daynix.com> --- ebpf/ebpf.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++ ebpf/ebpf.h | 31 +++++++++++++++++++++++++++ ebpf/ebpf_rss.c | 4 ++++ ebpf/meson.build | 1 + 4 files changed, 90 insertions(+) create mode 100644 ebpf/ebpf.c create mode 100644 ebpf/ebpf.h diff --git a/ebpf/ebpf.c b/ebpf/ebpf.c new file mode 100644 index 00000000000..fd96f2b42f9 --- /dev/null +++ b/ebpf/ebpf.c @@ -0,0 +1,54 @@ +/* + * QEMU eBPF binary declaration routine. + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Authors: + * Andrew Melnychenko <and...@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/queue.h" +#include "qapi/error.h" +#include "ebpf/ebpf.h" + +struct ElfBinaryDataEntry { + const char *id; + const void *data; + size_t datalen; + + QSLIST_ENTRY(ElfBinaryDataEntry) node; +}; + +static QSLIST_HEAD(, ElfBinaryDataEntry) ebpf_elf_obj_list = + QSLIST_HEAD_INITIALIZER(); + +void ebpf_register_binary_data(const char *id, const void *data, size_t datalen) +{ + struct ElfBinaryDataEntry *dataentry = NULL; + + dataentry = g_new0(struct ElfBinaryDataEntry, 1); + dataentry->data = data; + dataentry->datalen = datalen; + dataentry->id = id; + + QSLIST_INSERT_HEAD(&ebpf_elf_obj_list, dataentry, node); +} + +const void *ebpf_find_binary_by_id(const char *id, size_t *sz, Error **errp) +{ + struct ElfBinaryDataEntry *it = NULL; + QSLIST_FOREACH(it, &ebpf_elf_obj_list, node) { + if (strcmp(id, it->id) == 0) { + *sz = it->datalen; + return it->data; + } + } + + error_setg(errp, "can't find eBPF object with id: %s", id); + + return NULL; +} diff --git a/ebpf/ebpf.h b/ebpf/ebpf.h new file mode 100644 index 00000000000..36c5d455b4b --- /dev/null +++ b/ebpf/ebpf.h @@ -0,0 +1,31 @@ +/* + * QEMU eBPF binary declaration routine. + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Authors: + * Andrew Melnychenko <and...@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#ifndef EBPF_H +#define EBPF_H + +struct Error; + +void ebpf_register_binary_data(const char *id, const void *data, + size_t datalen); +const void *ebpf_find_binary_by_id(const char *id, size_t *sz, + struct Error **errp); + +#define ebpf_binary_init(id, fn) \ +static void __attribute__((constructor)) ebpf_binary_init_ ## fn(void) \ +{ \ + size_t datalen = 0; \ + const void *data = fn(&datalen); \ + ebpf_register_binary_data(id, data, datalen); \ +} + +#endif /* EBPF_H */ diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c index 08015fecb18..b4038725f23 100644 --- a/ebpf/ebpf_rss.c +++ b/ebpf/ebpf_rss.c @@ -21,6 +21,8 @@ #include "ebpf/ebpf_rss.h" #include "ebpf/rss.bpf.skeleton.h" +#include "ebpf/ebpf.h" + #include "trace.h" void ebpf_rss_init(struct EBPFRSSContext *ctx) @@ -237,3 +239,5 @@ void ebpf_rss_unload(struct EBPFRSSContext *ctx) ctx->obj = NULL; ctx->program_fd = -1; } + +ebpf_binary_init("rss", rss_bpf__elf_bytes) diff --git a/ebpf/meson.build b/ebpf/meson.build index 2dd0fd89480..67c3f53aa9d 100644 --- a/ebpf/meson.build +++ b/ebpf/meson.build @@ -1 +1,2 @@ +softmmu_ss.add(files('ebpf.c')) softmmu_ss.add(when: libbpf, if_true: files('ebpf_rss.c'), if_false: files('ebpf_rss-stub.c')) -- 2.39.1
