tree caec57a746cb04ef62e04fc5cf14a6acc555de46
parent ce2d2aedcc3ca582fed90f44970e8b3e4f006a7d
author Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> 1137634980 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1137640821 -0800

[PATCH] uml: allow again to move backing file and to override saved location

When the user specifies both a COW file and its backing file, if the previous
backing file is not found, currently UML tries again to use it and fails.

This can be corrected by changing same_backing_files() return value in that
case, so that the caller will try to change the COW file to point to the new
location, as already done in other cases.

Additionally, given the change in the meaning of the func, change its name,
invert its return value, so all values are inverted except when
stat(from_cow,&buf2) fails.  And add some comments and two minor bugfixes -
remove a fd leak (return err rather than goto out) and a repeated check.

Tested well.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>