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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2011-01-02 18:15:58 +0100 |
|---|---|---|
| committer | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2011-01-07 12:22:44 +0100 |
| commit | bfbb23466adcbc77facea3046b44f75530079472 (patch) | |
| tree | 31e28ac15e808861cd261e9600c4e7642d8aa73f /net/dccp | |
| parent | 763dadd47c884853a22f2f19ea27e58431303ff3 (diff) | |
| download | lwn-bfbb23466adcbc77facea3046b44f75530079472.tar.gz lwn-bfbb23466adcbc77facea3046b44f75530079472.zip | |
dccp: make upper bound for seq_window consistent on 32/64 bit
The 'seq_window' sysctl sets the initial value for the DCCP Sequence Window,
which may range from 32..2^46-1 (RFC 4340, 7.5.2). The patch sets the upper
bound consistently to 2^32-1 on both 32 and 64 bit systems, which should be
sufficient - with a RTT of 1sec and 1-byte packets, a seq_window of 2^32-1
corresponds to a link speed of 34 Gbps.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/sysctl.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/dccp/sysctl.c b/net/dccp/sysctl.c index 563943822e58..42348824ee31 100644 --- a/net/dccp/sysctl.c +++ b/net/dccp/sysctl.c @@ -21,7 +21,8 @@ /* Boundary values */ static int zero = 0, u8_max = 0xFF; -static unsigned long seqw_min = 32; +static unsigned long seqw_min = DCCPF_SEQ_WMIN, + seqw_max = 0xFFFFFFFF; /* maximum on 32 bit */ static struct ctl_table dccp_default_table[] = { { @@ -31,6 +32,7 @@ static struct ctl_table dccp_default_table[] = { .mode = 0644, .proc_handler = proc_doulongvec_minmax, .extra1 = &seqw_min, /* RFC 4340, 7.5.2 */ + .extra2 = &seqw_max, }, { .procname = "rx_ccid", |