[libvirt] [PATCH 2/2] virbpf: Fix typecast to __aligned_u64 type
In functions implemented here we fill this attr union (type of
bpf_attr) and just pass it to syscall(2). Thing is that some of
the union members are type of __aligned_u64. This is not regular
uint64_t. This one is explicitly aligned to 8 bytes, while
uint64_t can be aligned to 4 bytes (on 32 bits). We've used
explicit typecast to uint64_t to shut compiler which would
otherwise complain of assigning a pointer into an integer. Well,
we have uintptr_t just for that.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
src/util/virbpf.c | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)
diff --git a/src/util/virbpf.c b/src/util/virbpf.c
index 44f13fb485..dec8d0133a 100644
--- a/src/util/virbpf.c
+++ b/src/util/virbpf.c
@@ -65,10 +65,10 @@ virBPFLoadProg(struct bpf_insn *insns,
memset(&attr, 0, sizeof(attr));
attr.prog_type = progType;
- attr.insn_cnt = (uint32_t)insnCnt;
- attr.insns = (uint64_t)insns;
- attr.license = (uint64_t)"GPL";
- attr.log_buf = (uint64_t)logbuf;
+ attr.insn_cnt = insnCnt;
+ attr.insns = (uintptr_t)insns;
+ attr.license = (uintptr_t)"GPL";
+ attr.log_buf = (uintptr_t)logbuf;
attr.log_size = LOG_BUF_SIZE;
attr.log_level = 1;
@@ -130,7 +130,7 @@ virBPFQueryProg(int targetfd,
attr.query.target_fd = targetfd;
attr.query.attach_type = attachType;
attr.query.prog_cnt = maxprogids;
- attr.query.prog_ids = (uint64_t)progids;
+ attr.query.prog_ids = (uintptr_t)progids;
rc = syscall(SYS_bpf, BPF_PROG_QUERY, &attr, sizeof(attr));
@@ -166,7 +166,7 @@ virBPFGetProgInfo(int progfd,
attr.info.bpf_fd = progfd;
attr.info.info_len = sizeof(struct bpf_prog_info);
- attr.info.info = (uint64_t)info;
+ attr.info.info = (uintptr_t)info;
rc = syscall(SYS_bpf, BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
if (rc < 0)
@@ -180,12 +180,12 @@ virBPFGetProgInfo(int progfd,
memset(info, 0, sizeof(struct bpf_prog_info));
info->nr_map_ids = maplen;
- info->map_ids = (uint64_t)retmapIDs;
+ info->map_ids = (uintptr_t)retmapIDs;
memset(&attr, 0, sizeof(attr));
attr.info.bpf_fd = progfd;
attr.info.info_len = sizeof(struct bpf_prog_info);
- attr.info.info = (uint64_t)info;
+ attr.info.info = (uintptr_t)info;
rc = syscall(SYS_bpf, BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
if (rc < 0)
@@ -221,7 +221,7 @@ virBPFGetMapInfo(int mapfd,
attr.info.bpf_fd = mapfd;
attr.info.info_len = sizeof(struct bpf_map_info);
- attr.info.info = (uint64_t)info;
+ attr.info.info = (uintptr_t)info;
return syscall(SYS_bpf, BPF_OBJ_GET_INFO_BY_FD, &attr, sizeof(attr));
}
@@ -237,8 +237,8 @@ virBPFLookupElem(int mapfd,
memset(&attr, 0, sizeof(attr));
attr.map_fd = mapfd;
- attr.key = (uint64_t)key;
- attr.value = (uint64_t)val;
+ attr.key = (uintptr_t)key;
+ attr.value = (uintptr_t)val;
return syscall(SYS_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));
}
@@ -254,8 +254,8 @@ virBPFGetNextElem(int mapfd,
memset(&attr, 0, sizeof(attr));
attr.map_fd = mapfd;
- attr.key = (uint64_t)key;
- attr.next_key = (uint64_t)nextKey;
+ attr.key = (uintptr_t)key;
+ attr.next_key = (uintptr_t)nextKey;
return syscall(SYS_bpf, BPF_MAP_GET_NEXT_KEY, &attr, sizeof(attr));
}
@@ -271,8 +271,8 @@ virBPFUpdateElem(int mapfd,
memset(&attr, 0, sizeof(attr));
attr.map_fd = mapfd;
- attr.key = (uint64_t)key;
- attr.value = (uint64_t)val;
+ attr.key = (uintptr_t)key;
+ attr.value = (uintptr_t)val;
return syscall(SYS_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
}
@@ -287,7 +287,7 @@ virBPFDeleteElem(int mapfd,
memset(&attr, 0, sizeof(attr));
attr.map_fd = mapfd;
- attr.key = (uint64_t)key;
+ attr.key = (uintptr_t)key;
return syscall(SYS_bpf, BPF_MAP_DELETE_ELEM, &attr, sizeof(attr));
}
--
2.23.0