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, 52 insertions, 0 deletions

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index b32cdb3bf7c5..e82288f7cf21 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -32,6 +32,7 @@
 #include <linux/uio.h>
 #include <linux/sched.h>
 #include <linux/pipe_fs_i.h>
+#include <linux/mount.h>
 
 #define MLOG_MASK_PREFIX ML_INODE
 #include <cluster/masklog.h>
@@ -135,6 +136,57 @@ bail:
         return (err < 0) ? -EIO : 0;
 }
 
+int ocfs2_should_update_atime(struct inode *inode,
+                              struct vfsmount *vfsmnt)
+{
+        struct timespec now;
+        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+        if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+                return 0;
+
+        if ((inode->i_flags & S_NOATIME) ||
+            ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
+                return 0;
+
+        if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
+            ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
+                return 0;
+
+        now = CURRENT_TIME;
+        if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
+                return 0;
+        else
+                return 1;
+}
+
+int ocfs2_update_inode_atime(struct inode *inode,
+                             struct buffer_head *bh)
+{
+        int ret;
+        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+        handle_t *handle;
+
+        mlog_entry_void();
+
+        handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+        if (handle == NULL) {
+                ret = -ENOMEM;
+                mlog_errno(ret);
+                goto out;
+        }
+
+        inode->i_atime = CURRENT_TIME;
+        ret = ocfs2_mark_inode_dirty(handle, inode, bh);
+        if (ret < 0)
+                mlog_errno(ret);
+
+        ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
+out:
+        mlog_exit(ret);
+        return ret;
+}
+
 int ocfs2_set_inode_size(handle_t *handle,
                          struct inode *inode,
                          struct buffer_head *fe_bh,