ocfs2: core atime update functions

This patch adds the core routines for updating atime in ocfs2.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index d9b1eb6a3c6e..b0992573dee2 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -139,6 +139,7 @@ enum {
         Opt_hb_local,
         Opt_data_ordered,
         Opt_data_writeback,
+        Opt_atime_quantum,
         Opt_err,
 };
 
@@ -152,6 +153,7 @@ static match_table_t tokens = {
         {Opt_hb_local, OCFS2_HB_LOCAL},
         {Opt_data_ordered, "data=ordered"},
         {Opt_data_writeback, "data=writeback"},
+        {Opt_atime_quantum, "atime_quantum=%u"},
         {Opt_err, NULL}
 };
 
@@ -705,6 +707,7 @@ static int ocfs2_parse_options(struct super_block *sb,
         while ((p = strsep(&options, ",")) != NULL) {
                 int token, option;
                 substring_t args[MAX_OPT_ARGS];
+                struct ocfs2_super * osb = OCFS2_SB(sb);
 
                 if (!*p)
                         continue;
@@ -745,6 +748,16 @@ static int ocfs2_parse_options(struct super_block *sb,
                 case Opt_data_writeback:
                         *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
                         break;
+                case Opt_atime_quantum:
+                        if (match_int(&args[0], &option)) {
+                                status = 0;
+                                goto bail;
+                        }
+                        if (option >= 0)
+                                osb->s_atime_quantum = option;
+                        else
+                                osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+                        break;
                 default:
                         mlog(ML_ERROR,
                              "Unrecognized mount option \"%s\" "
@@ -1265,6 +1278,8 @@ static int ocfs2_initialize_super(struct super_block *sb,
         init_waitqueue_head(&osb->checkpoint_event);
         atomic_set(&osb->needs_checkpoint, 0);
 
+        osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+
         osb->node_num = O2NM_INVALID_NODE_NUM;
         osb->slot_num = OCFS2_INVALID_SLOT;