File permissions in ext4

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Hello,

I am attempting to read the file permissions from a file in EXT4, but
I'm not sure where it is stored? Any ideas?

I thought this would be the ACL, and I read both
ext4_inode.i_file_acl_lo and ext4_inode.l_i_file_acl_high and they are
both zero, despite the fact that the file has 644 permission set. Is
the ACL actually used for anything?

thanks in advance =)
-- 
Felipe Monteiro de Carvalho
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