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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 05:30:19 (GMT) |
|---|---|---|
| committer | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 05:45:41 (GMT) |
| commit | 49ffc29a0223adbe0ea7005eea3ab2a03abbeb06 (patch) | |
| tree | d7bf19858c85b5dbb6bded3f543fbf8a6a355a2e /net/dccp/dccp.h | |
| parent | 2b81143aa3505e2460b24b357996c2f21840ea58 (diff) | |
| download | linux-49ffc29a0223adbe0ea7005eea3ab2a03abbeb06.tar.xz | |
dccp: Clamping RTT values
This extracts the clamping part of dccp_sample_rtt() and makes it available
to other parts of the code (as e.g. used in the next patch).
Note: The function dccp_sample_rtt() now reduces to subtracting the elapsed
time. This could be eliminated but would require shorter prefixes and thus
is not done by this patch - maybe an idea for later.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net/dccp/dccp.h')
| -rw-r--r-- | net/dccp/dccp.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index b63a82c..5281190 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -334,7 +334,14 @@ extern struct sk_buff *dccp_ctl_make_reset(struct sock *sk, extern int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code); extern void dccp_send_close(struct sock *sk, const int active); extern int dccp_invalid_packet(struct sk_buff *skb); -extern u32 dccp_sample_rtt(struct sock *sk, long delta); + +static inline u32 dccp_sane_rtt(long usec_sample) +{ + if (unlikely(usec_sample <= 0 || usec_sample > DCCP_SANE_RTT_MAX)) + DCCP_WARN("RTT sample %ld out of bounds!\n", usec_sample); + return clamp_val(usec_sample, DCCP_SANE_RTT_MIN, DCCP_SANE_RTT_MAX); +} +extern u32 dccp_sample_rtt(struct sock *sk, long delta); static inline int dccp_bad_service_code(const struct sock *sk, const __be32 service) |