ovl: allocate anonymous devs for lowerdirs

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Generate unique values of st_dev per lower layer for non-samefs
overlay mount. The unique values are obtained by allocating anonymous
bdevs for each of the lowerdirs in the overlayfs instance.

The anonymous bdev is going to be returned by stat(2) for lowerdir
non-dir entries in non-samefs case.

[amir: split from ovl_getattr() and re-structure patches]

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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Chandan Rajendra 2017-11-01 20:12:49 +02:00 • committed by Miklos Szeredi

parent b93436320c

commit 2a9c6d066e

2 changed files with 17 additions and 2 deletions

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1

fs/overlayfs/ovl_entry.h

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18

fs/overlayfs/super.c

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