Wrapper around statfs() interface.
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
fs/statfs.c | 14 ++++++++++++++
include/linux/statfs.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/fs/statfs.c b/fs/statfs.c
index f0216629621d..eea7af6f2f22 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -67,6 +67,20 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
return retval;
}
+int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid)
+{
+ struct kstatfs st;
+ int error;
+
+ error = statfs_by_dentry(dentry, &st);
+ if (error)
+ return error;
+
+ *fsid = st.f_fsid;
+ return 0;
+}
+EXPORT_SYMBOL(vfs_get_fsid);
+
int vfs_statfs(const struct path *path, struct kstatfs *buf)
{
int error;
diff --git a/include/linux/statfs.h b/include/linux/statfs.h
index 3142e98546ac..9bc69edb8f18 100644
--- a/include/linux/statfs.h
+++ b/include/linux/statfs.h
@@ -41,4 +41,7 @@ struct kstatfs {
#define ST_NODIRATIME 0x0800 /* do not update directory access times */
#define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */
+struct dentry;
+extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid);
+
#endif
--
2.17.1
