ovl: pass layer mnt to ovl_open_realfile()

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Ensure that ovl_open_realfile() takes the mount's idmapping into
account. We add a new helper ovl_path_realdata() that can be used to
easily retrieve the relevant path which we can pass down. This is needed
to support idmapped base layers with overlay.

Cc: <linux-unionfs@vger.kernel.org>
Tested-by: Giuseppe Scrivano <gscrivan@redhat.com>
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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Amir Goldstein 2022-04-04 12:51:47 +02:00 • committed by Miklos Szeredi

parent 5272eaf3a5

commit 1248ea4b91

3 changed files with 28 additions and 9 deletions

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22

fs/overlayfs/file.c

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1

fs/overlayfs/overlayfs.h

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14

fs/overlayfs/util.c

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