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Commit 71dc4c30 authored by Joe Stringer's avatar Joe Stringer Committed by Arnaldo Carvalho de Melo
Browse files

tools lib api fs: Add bpf_fs filesystem detector 



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

Signed-off-by: default avatarJoe 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 9a9c733d

tools/lib/api/fs/fs.c

+16 −0
Original line number Diff line number Diff line
@@ -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)

{

tools/lib/api/fs/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ FS(procfs) 
FS(debugfs)

FS(tracefs)

FS(hugetlbfs)

FS(bpf_fs)



#undef FS