Get the link offset using the zfs_dnode_sa_lookup helper now. Recently, the symbolic links we rely on in the boot loader have stopped working. Prior to OpenZFS commit e90badec11d3 ("Inherit the project ID for every object type", Matt Turner, 2026-08-14), symbolic link information was written at a fixed offset in the SA data. Since that commit, the inherited PROJIDs mean that all pools with quota enabled have started writing symbolic links with a new, non-fixed offset. Old symbolic links remained unchanged, but new ones were written with a different offset. At work, we have all these things: rewritten BEs, quotas, and a dependence on symbolic links in our boot path. This came in on 2026-08-24 OpenZFS merge (22649d4dba73). This was 12 hours after stab week for August, so we didn't hit this until the September stab week. Since the new kernel has to write links at the new offset, the initial tests worked, but the second ones didn't. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D60268