Commit a00c2d59 authored May 11, 2018 by Vivek Goyal Committed by Miklos Szeredi Jul 20, 2018

ovl: Add an inode flag OVL_CONST_INO



Add an ovl_inode flag OVL_CONST_INO.  This flag signifies if inode number
will remain constant over copy up or not.  This flag does not get updated
over copy up and remains unmodifed after setting once.

Next patch in the series will make use of this flag.  It will basically
figure out if dentry is of type ORIGIN or not.  And this can be derived by
this flag.

ORIGIN = (upperdentry && ovl_test_flag(OVL_CONST_INO, inode)).

Suggested-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

parent 0b17c28a

fs/overlayfs/inode.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -883,6 +883,9 @@ struct inode ovl_get_inode(struct super_block sb,

		OVL_I(inode)->redirect = oip->redirect;

		if (bylower)
		ovl_set_flag(OVL_CONST_INO, inode);

		/* Check for non-merge dir that may have whiteouts */
		if (is_dir) {
		if (((upperdentry && lowerdentry) \|\| oip->numlower > 1) \|\|

fs/overlayfs/overlayfs.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -38,6 +38,8 @@ enum ovl_inode_flag {
		OVL_WHITEOUTS,
		OVL_INDEX,
		OVL_UPPERDATA,
		/* Inode number will remain constant over copy up. */
		OVL_CONST_INO,
		};

		enum ovl_entry_flag {

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