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Subject[PATCHv3 perf/core 5/6] tools lib api fs: Add bpf_fs filesystem detector
Date
Allow mounting of the BPF filesystem at /sys/fs/bpf.

Signed-off-by: Joe Stringer <joe@ovn.org>
---
v3: Initial post.
---
tools/lib/api/fs/fs.c | 16 ++++++++++++++++
tools/lib/api/fs/fs.h | 1 +
2 files changed, 17 insertions(+)

diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index f99f49e4a31e..4b6bfc43cccf 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -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)
{
diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h
index a63269f5d20c..6b332dc74498 100644
--- a/tools/lib/api/fs/fs.h
+++ b/tools/lib/api/fs/fs.h
@@ -22,6 +22,7 @@ FS(procfs)
FS(debugfs)
FS(tracefs)
FS(hugetlbfs)
+FS(bpf_fs)

#undef FS

--
2.11.0
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