2 files changed, 29 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 17b72d88c4cb..75f44379b7e9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -469,6 +469,7 @@ struct signal_struct {
         cputime_t utime, stime, cutime, cstime;
         unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
         unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
+        unsigned long inblock, oublock, cinblock, coublock;
 
         /*
          * Cumulative ns of scheduled CPU time for dead threads in the
diff --git a/include/linux/task_io_accounting_ops.h b/include/linux/task_io_accounting_ops.h
index df2a319106b2..1218733ec6b5 100644
--- a/include/linux/task_io_accounting_ops.h
+++ b/include/linux/task_io_accounting_ops.h
@@ -10,11 +10,29 @@ static inline void task_io_account_read(size_t bytes)
         current->ioac.read_bytes += bytes;
 }
 
+/*
+ * We approximate number of blocks, because we account bytes only.
+ * A 'block' is 512 bytes
+ */
+static inline unsigned long task_io_get_inblock(const struct task_struct *p)
+{
+        return p->ioac.read_bytes >> 9;
+}
+
 static inline void task_io_account_write(size_t bytes)
 {
         current->ioac.write_bytes += bytes;
 }
 
+/*
+ * We approximate number of blocks, because we account bytes only.
+ * A 'block' is 512 bytes
+ */
+static inline unsigned long task_io_get_oublock(const struct task_struct *p)
+{
+        return p->ioac.write_bytes >> 9;
+}
+
 static inline void task_io_account_cancelled_write(size_t bytes)
 {
         current->ioac.cancelled_write_bytes += bytes;
@@ -31,10 +49,20 @@ static inline void task_io_account_read(size_t bytes)
 {
 }
 
+static inline unsigned long task_io_get_inblock(const struct task_struct *p)
+{
+        return 0;
+}
+
 static inline void task_io_account_write(size_t bytes)
 {
 }
 
+static inline unsigned long task_io_get_oublock(const struct task_struct *p)
+{
+        return 0;
+}
+
 static inline void task_io_account_cancelled_write(size_t bytes)
 {
 }