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ovl: update documentation of inodes index feature

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Document that inode index feature solves breaking hard links on
copy up.

Simplify Kconfig backward compatibility disclaimer.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein
2018-01-10 23:15:21 +02:00
committed by Miklos Szeredi
parent 051224438a
commit 60b866420b
2 changed files with 6 additions and 9 deletions
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9
fs/overlayfs/Kconfig
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@@ -47,9 +47,6 @@ config OVERLAY_FS_INDEX
The inodes index feature prevents breaking of lower hardlinks on copy
up.
Note, that the inodes index feature is read-only backward compatible.
That is, mounting an overlay which has an index dir on a kernel that
doesn't support this feature read-only, will not have any negative
outcomes. However, mounting the same overlay with an old kernel
read-write and then mounting it again with a new kernel, will have
unexpected results.
Note, that the inodes index feature is not backward compatible.
That is, mounting an overlay which has an inodes index on a kernel
that doesn't support this feature will have unexpected results.