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tools lib api fs: Add hugetlbfs filesystem detector 

Detect hugetlbfs. hugetlbfs__mountpoint() will be used during recording
to help identifying hugetlb mmaps: which should be recognized as anon
mapping.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reviewed-by: Nilay Vaish <nilayvaish@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Hou Pengyang <houpengyang@huawei.com>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1473137909-142064-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan 2016-09-06 04:58:28 +00:00 committed by Arnaldo Carvalho de Melo
parent 0ac3348e50
commit 5e7be3e1f9
2 changed files with 16 additions and 0 deletions
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15
tools/lib/api/fs/fs.c
View File

@ -34,6 +34,10 @@
#define TRACEFS_MAGIC 0x74726163
#endif
#ifndef HUGETLBFS_MAGIC
#define HUGETLBFS_MAGIC 0x958458f6
#endif
static const char * const sysfs__fs_known_mountpoints[] = {
"/sys",
0,
@ -67,6 +71,10 @@ static const char * const tracefs__known_mountpoints[] = {
0,
};
static const char * const hugetlbfs__known_mountpoints[] = {
0,
};
struct fs {
const char *name;
const char * const *mounts;
@ -80,6 +88,7 @@ enum {
FS__PROCFS = 1,
FS__DEBUGFS = 2,
FS__TRACEFS = 3,
FS__HUGETLBFS = 4,
};
#ifndef TRACEFS_MAGIC
@ -107,6 +116,11 @@ static struct fs fs__entries[] = {
.mounts = tracefs__known_mountpoints,
.magic = TRACEFS_MAGIC,
},
[FS__HUGETLBFS] = {
.name = "hugetlbfs",
.mounts = hugetlbfs__known_mountpoints,
.magic = HUGETLBFS_MAGIC,
},
};
static bool fs__read_mounts(struct fs *fs)
@ -265,6 +279,7 @@ FS(sysfs, FS__SYSFS);
FS(procfs, FS__PROCFS);
FS(debugfs, FS__DEBUGFS);
FS(tracefs, FS__TRACEFS);
FS(hugetlbfs, FS__HUGETLBFS);
int filename__read_int(const char *filename, int *value)
{

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

@ -21,6 +21,7 @@ FS(sysfs)
FS(procfs)
FS(debugfs)
FS(tracefs)
FS(hugetlbfs)
#undef FS