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vfs: Fix O_NOFOLLOW behavior for paths with trailing slashes
According to specification
mkdir d; ln -s d a; open("a/", O_NOFOLLOW | O_RDONLY)
should return success but currently it returns ELOOP. This is a
regression caused by path lookup cleanup patch series.
Fix the code to ignore O_NOFOLLOW in case the provided path has trailing
slashes.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Marius Tolzmann <tolzmann@molgen.mpg.de>
Acked-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>