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cxgbe(4): validate largest_rx_cluster and safest_rx_cluster.

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These tunables can only be set to a valid cluster size (2K, 4K, 9K, or
16K) as documented in the man page.  Anything else could lead to a
panic on interface up.

Reported by:	mav@
MFC after:	1 week
Sponsored by:	Chelsio Communications
This commit is contained in:
np 2020-10-02 05:59:55 +00:00
parent a3bbb67b61
commit c06489b833
1 changed files with 22 additions and 0 deletions
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22
sys/dev/cxgbe/t4_sge.c
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@ -542,6 +542,28 @@ t4_sge_modload(void)
tscale = 1;
}
if (largest_rx_cluster != MCLBYTES &&
#if MJUMPAGESIZE != MCLBYTES
largest_rx_cluster != MJUMPAGESIZE &&
#endif
largest_rx_cluster != MJUM9BYTES &&
largest_rx_cluster != MJUM16BYTES) {
printf("Invalid hw.cxgbe.largest_rx_cluster value (%d),"
" using %d instead.\n", largest_rx_cluster, MJUM16BYTES);
largest_rx_cluster = MJUM16BYTES;
}
if (safest_rx_cluster != MCLBYTES &&
#if MJUMPAGESIZE != MCLBYTES
safest_rx_cluster != MJUMPAGESIZE &&
#endif
safest_rx_cluster != MJUM9BYTES &&
safest_rx_cluster != MJUM16BYTES) {
printf("Invalid hw.cxgbe.safest_rx_cluster value (%d),"
" using %d instead.\n", safest_rx_cluster, MJUMPAGESIZE);
safest_rx_cluster = MJUMPAGESIZE;
}
extfree_refs = counter_u64_alloc(M_WAITOK);
extfree_rels = counter_u64_alloc(M_WAITOK);
pullups = counter_u64_alloc(M_WAITOK);