ovl: Copy up meta inode data from lowest data inode

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So far lower could not be a meta inode.  So whenever it was time to copy up
data of a meta inode, we could copy it up from top most lower dentry.

But now lower itself can be a metacopy inode.  That means data copy up
needs to take place from a data inode in metacopy inode chain.  Find lower
data inode in the chain and use that for data copy up.

Introduced a helper called ovl_path_lowerdata() to find the lower data
inode chain.

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 11:49:30 -04:00 • committed by Miklos Szeredi

parent 9d3dfea3d3

commit 4f93b426ab

3 changed files with 22 additions and 4 deletions

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13

fs/overlayfs/copy_up.c

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1

fs/overlayfs/overlayfs.h

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12

fs/overlayfs/util.c

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