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From 4d690855d6bdc15b753ac3c21bf507ad94d46aac Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Sun, 21 Sep 2008 11:58:27 -0700
Subject: [PATCH] superreadahead patch
---
fs/ext3/ioctl.c | 3 +++
fs/ext3/super.c | 1 +
include/linux/ext3_fs.h | 1 +
include/linux/fs.h | 2 ++
4 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index 8897481..08f4854 100644
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -276,6 +276,9 @@ group_add_out:
mnt_drop_write(filp->f_path.mnt);
return err;
}
+ case EXT3_IOC_INODE_JIFFIES: {
+ return inode->created_when;
+ }
default:
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 524b349..e6e8514 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -466,6 +466,7 @@ static struct inode *ext3_alloc_inode(struct super_block *sb)
return NULL;
ei->i_block_alloc_info = NULL;
ei->vfs_inode.i_version = 1;
+ ei->vfs_inode.created_when = jiffies;
atomic_set(&ei->i_datasync_tid, 0);
atomic_set(&ei->i_sync_tid, 0);
return &ei->vfs_inode;
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 634a5e5..84d5394 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -250,6 +250,7 @@ struct ext3_new_group_data {
#endif
#define EXT3_IOC_GETRSVSZ _IOR('f', 5, long)
#define EXT3_IOC_SETRSVSZ _IOW('f', 6, long)
+#define EXT3_IOC_INODE_JIFFIES _IOR('f', 19, long)
/*
* ioctl commands in 32 bit emulation
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0872372..078e3fd 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -781,6 +781,8 @@ struct inode {
struct posix_acl *i_default_acl;
#endif
void *i_private; /* fs or device private pointer */
+
+ unsigned long created_when; /* jiffies of creation time */
};
/*
--
1.6.0.6
--- vanilla-2.6.32-rc7/fs/btrfs/inode.c~ 2009-11-13 11:15:48.000000000 -0800
+++ vanilla-2.6.32-rc7/fs/btrfs/inode.c 2009-11-13 11:15:48.000000000 -0800
@@ -5181,6 +5181,7 @@
ei->outstanding_extents = 0;
ei->reserved_extents = 0;
ei->root = NULL;
+ ei->vfs_inode.created_when = jiffies;
spin_lock_init(&ei->accounting_lock);
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
--- vanilla-2.6.32-rc7/fs/btrfs/ioctl.c~ 2009-11-13 11:16:58.000000000 -0800
+++ vanilla-2.6.32-rc7/fs/btrfs/ioctl.c 2009-11-13 11:16:58.000000000 -0800
@@ -1298,6 +1298,8 @@
return 0;
}
+#define EXT3_IOC_INODE_JIFFIES _IOR('f', 19, long)
+
long btrfs_ioctl(struct file *file, unsigned int
cmd, unsigned long arg)
{
@@ -1337,6 +1338,8 @@
case BTRFS_IOC_SYNC:
btrfs_sync_fs(file->f_dentry->d_sb, 1);
return 0;
+ case EXT3_IOC_INODE_JIFFIES:
+ return fdentry(file)->d_inode->created_when;
}
return -ENOTTY;
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