follow_dotdot(): be lazy about changing nd->path

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Change nd->path only after the loop is done and only in case we hadn't
ended up finding ourselves in root.  Same for NO_XDEV check.

That separates the "check how far back do we need to go through the
mount stack" logics from the rest of .. traversal.

NOTE: path_get/path_put introduced here are temporary.  They will
go away later in the series.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2020-02-28 10:17:52 -05:00

parent efe772d628

commit 165200d6cb

1 changed files with 13 additions and 5 deletions

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18

fs/namei.c

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