ovl: Add an inode flag OVL_CONST_INO

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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>

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Vivek Goyal 2018-05-11 11:49:32 -04:00 • committed by Miklos Szeredi

parent 0b17c28af1

commit a00c2d59e9

2 changed files with 5 additions and 0 deletions

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3

fs/overlayfs/inode.c

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2

fs/overlayfs/overlayfs.h

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