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authorDavid Gibson <david@gibson.dropbear.id.au>2023-01-06 11:43:08 +1100
committerStefano Brivio <sbrivio@redhat.com>2023-01-23 18:54:33 +0100
commitf1d2d3541689e099c6d360204b1afa662437695d (patch)
treeeed49f5fd9f747866545dcc4afcc74558e3b2139 /test/distro
parent99f0be3cad2292c61c79cef1afeb5cc2ba8507c2 (diff)
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tcp: Don't compute total bytes in a message until we need it
tcp[46]_l2_buf_bytes keep track of the total number of bytes we have queued to send to the tap interface. tcp_l2_buf_flush_passt() uses this to determine if sendmsg() has sent all the data we requested, or whether we need to resend a trailing portion. However, the logic for finding where we're up to in the case of a short sendmsg() can equally well tell whether we've had one at all, without knowing the total number in advance. This does require an extra loop after each sendmsg(), but it's doing simple arithmetic on values we've already been accessing, and it leads to overall simpler code. tcp[46]_l2_flags_buf_bytes were being calculated, but never used for anything, so simply remove them. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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