diff options
| author | Chenbo Feng <fengc@google.com> | 2017-10-18 22:00:22 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-20 14:32:59 +0200 |
| commit | 6e71b04a82248ccf13a94b85cbc674a9fefe53f5 (patch) | |
| tree | 45cab2ff677b04d921a2813738dc1ada8c07eaec /kernel/bpf/lpm_trie.c | |
| parent | net-tun: fix panics at dismantle time (diff) | |
| download | linux-6e71b04a82248ccf13a94b85cbc674a9fefe53f5.tar.xz linux-6e71b04a82248ccf13a94b85cbc674a9fefe53f5.zip | |
bpf: Add file mode configuration into bpf maps
Introduce the map read/write flags to the eBPF syscalls that returns the
map fd. The flags is used to set up the file mode when construct a new
file descriptor for bpf maps. To not break the backward capability, the
f_flags is set to O_RDWR if the flag passed by syscall is 0. Otherwise
it should be O_RDONLY or O_WRONLY. When the userspace want to modify or
read the map content, it will check the file mode to see if it is
allowed to make the change.
Signed-off-by: Chenbo Feng <fengc@google.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/lpm_trie.c')
| -rw-r--r-- | kernel/bpf/lpm_trie.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c index 34d8a690ea05..885e45479680 100644 --- a/kernel/bpf/lpm_trie.c +++ b/kernel/bpf/lpm_trie.c @@ -495,7 +495,8 @@ out: #define LPM_KEY_SIZE_MAX LPM_KEY_SIZE(LPM_DATA_SIZE_MAX) #define LPM_KEY_SIZE_MIN LPM_KEY_SIZE(LPM_DATA_SIZE_MIN) -#define LPM_CREATE_FLAG_MASK (BPF_F_NO_PREALLOC | BPF_F_NUMA_NODE) +#define LPM_CREATE_FLAG_MASK (BPF_F_NO_PREALLOC | BPF_F_NUMA_NODE | \ + BPF_F_RDONLY | BPF_F_WRONLY) static struct bpf_map *trie_alloc(union bpf_attr *attr) { |