vfs: add vfs_get_fsid() helper (ec86ff56) · Commits · 戴 / test

fs/statfs.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -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;

+3 −0

Original line number	Diff line number	Diff line
		@@ -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