rxrpc: Use info in skbuff instead of reparsing a jumbo packet

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Use the information now cached in the skbuff private data to avoid the need
to reparse a jumbo packet.  We can find all the subpackets by dead
reckoning, so it's only necessary to note how many there are, whether the
last one is flagged as LAST_PACKET and whether any have the REQUEST_ACK
flag set.

This is necessary as once recvmsg() can see the packet, it can start
modifying it, such as doing in-place decryption.

Fixes: 248f219cb8 ("rxrpc: Rewrite the data and ack handling code")
Signed-off-by: David Howells <dhowells@redhat.com>

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This commit is contained in:

David Howells 2019-08-27 09:51:30 +01:00

parent c3c9e3df49

commit e2de6c4048

3 changed files with 139 additions and 136 deletions

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3

net/rxrpc/ar-internal.h

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229

net/rxrpc/input.c

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41

net/rxrpc/recvmsg.c

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