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tools lib api fs: Add bpf_fs filesystem detector 

Allow mounting of the BPF filesystem at /sys/fs/bpf.

Signed-off-by: Joe Stringer <joe@ovn.org>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20170126212001.14103-6-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Joe Stringer 2017-01-26 13:20:00 -08:00 committed by Arnaldo Carvalho de Melo
parent 9a9c733d68
commit 71dc4c3068
2 changed files with 17 additions and 0 deletions
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16
tools/lib/api/fs/fs.c
View File

@ -38,6 +38,10 @@
#define HUGETLBFS_MAGIC 0x958458f6
#endif
#ifndef BPF_FS_MAGIC
#define BPF_FS_MAGIC 0xcafe4a11
#endif
static const char * const sysfs__fs_known_mountpoints[] = {
"/sys",
0,
@ -75,6 +79,11 @@ static const char * const hugetlbfs__known_mountpoints[] = {
0,
};
static const char * const bpf_fs__known_mountpoints[] = {
"/sys/fs/bpf",
0,
};
struct fs {
const char *name;
const char * const *mounts;
@ -89,6 +98,7 @@ enum {
FS__DEBUGFS = 2,
FS__TRACEFS = 3,
FS__HUGETLBFS = 4,
FS__BPF_FS = 5,
};
#ifndef TRACEFS_MAGIC
@ -121,6 +131,11 @@ static struct fs fs__entries[] = {
.mounts = hugetlbfs__known_mountpoints,
.magic = HUGETLBFS_MAGIC,
},
[FS__BPF_FS] = {
.name = "bpf",
.mounts = bpf_fs__known_mountpoints,
.magic = BPF_FS_MAGIC,
},
};
static bool fs__read_mounts(struct fs *fs)
@ -280,6 +295,7 @@ FS(procfs, FS__PROCFS);
FS(debugfs, FS__DEBUGFS);
FS(tracefs, FS__TRACEFS);
FS(hugetlbfs, FS__HUGETLBFS);
FS(bpf_fs, FS__BPF_FS);
int filename__read_int(const char *filename, int *value)
{

1
tools/lib/api/fs/fs.h
View File

@ -22,6 +22,7 @@ FS(procfs)
FS(debugfs)
FS(tracefs)
FS(hugetlbfs)
FS(bpf_fs)
#undef FS