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learn: Allow read-only fields to be matched.

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nxm_dst_check() requires a writable field.  Since NX_LEARN_DST_MATCH only
matches on a field and doesn't write to a field, use nxm_src_check() for
that case instead.

Bug #7507.
Reported-by: Michael Mao <mmao@nicira.com>
This commit is contained in:
Ben Pfaff
2011-09-27 13:10:58 -07:00
parent 15c819b439
commit db0a4375c4
1 changed files with 3 additions and 1 deletions
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4
lib/learn.c
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@@ -160,7 +160,9 @@ learn_check(const struct nx_action_learn *learn, const struct flow *flow)
int dst_ofs = ntohs(get_be16(&p));
int error;
error = nxm_dst_check(dst_field, dst_ofs, n_bits, &rule.flow);
error = (dst_type == NX_LEARN_DST_LOAD
? nxm_dst_check(dst_field, dst_ofs, n_bits, &rule.flow)
: nxm_src_check(dst_field, dst_ofs, n_bits, &rule.flow));
if (error) {
return error;
}