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531118f1cc
Introduct new xattr name prefix security.bpf., and enable reading these xattrs from bpf kfuncs bpf_get_[file|dentry]_xattr(). As we are on it, correct the comments for return value of bpf_get_[file|dentry]_xattr(), i.e. return length the xattr value on success. Signed-off-by: Song Liu <song@kernel.org> Acked-by: Christian Brauner <brauner@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Matt Bobrowski <mattbobrowski@google.com> Link: https://lore.kernel.org/r/20250130213549.3353349-2-song@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>