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tcp: bool conversions

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bool conversions where possible.

__inline__ -> inline

space cleanups

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2012-05-16 23:15:34 +00:00
committed by David S. Miller
parent e005d193d5
commit a2a385d627
9 changed files with 219 additions and 216 deletions
Download Patch File Download Diff File Expand all files Collapse all files

75
net/ipv4/tcp_output.c
View File

@@ -370,7 +370,7 @@ static void tcp_init_nondata_skb(struct sk_buff *skb, u32 seq, u8 flags)
TCP_SKB_CB(skb)->end_seq = seq;
}
static inline int tcp_urg_mode(const struct tcp_sock *tp)
static inline bool tcp_urg_mode(const struct tcp_sock *tp)
{
return tp->snd_una != tp->snd_up;
}
@@ -1391,20 +1391,20 @@ static int tcp_init_tso_segs(const struct sock *sk, struct sk_buff *skb,
}
/* Minshall's variant of the Nagle send check. */
static inline int tcp_minshall_check(const struct tcp_sock *tp)
static inline bool tcp_minshall_check(const struct tcp_sock *tp)
{
return after(tp->snd_sml, tp->snd_una) &&
!after(tp->snd_sml, tp->snd_nxt);
}
/* Return 0, if packet can be sent now without violation Nagle's rules:
/* Return false, if packet can be sent now without violation Nagle's rules:
* 1. It is full sized.
* 2. Or it contains FIN. (already checked by caller)
* 3. Or TCP_CORK is not set, and TCP_NODELAY is set.
* 4. Or TCP_CORK is not set, and all sent packets are ACKed.
* With Minshall's modification: all sent small packets are ACKed.
*/
static inline int tcp_nagle_check(const struct tcp_sock *tp,
static inline bool tcp_nagle_check(const struct tcp_sock *tp,
const struct sk_buff *skb,
unsigned int mss_now, int nonagle)
{
@@ -1413,11 +1413,11 @@ static inline int tcp_nagle_check(const struct tcp_sock *tp,
(!nonagle && tp->packets_out && tcp_minshall_check(tp)));
}
/* Return non-zero if the Nagle test allows this packet to be
/* Return true if the Nagle test allows this packet to be
* sent now.
*/
static inline int tcp_nagle_test(const struct tcp_sock *tp, const struct sk_buff *skb,
unsigned int cur_mss, int nonagle)
static inline bool tcp_nagle_test(const struct tcp_sock *tp, const struct sk_buff *skb,
unsigned int cur_mss, int nonagle)
{
/* Nagle rule does not apply to frames, which sit in the middle of the
* write_queue (they have no chances to get new data).
@@ -1426,24 +1426,25 @@ static inline int tcp_nagle_test(const struct tcp_sock *tp, const struct sk_buff
* argument based upon the location of SKB in the send queue.
*/
if (nonagle & TCP_NAGLE_PUSH)
return 1;
return true;
/* Don't use the nagle rule for urgent data (or for the final FIN).
* Nagle can be ignored during F-RTO too (see RFC4138).
*/
if (tcp_urg_mode(tp) || (tp->frto_counter == 2) ||
(TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN))
return 1;
return true;
if (!tcp_nagle_check(tp, skb, cur_mss, nonagle))
return 1;
return true;
return 0;
return false;
}
/* Does at least the first segment of SKB fit into the send window? */
static inline int tcp_snd_wnd_test(const struct tcp_sock *tp, const struct sk_buff *skb,
unsigned int cur_mss)
static bool tcp_snd_wnd_test(const struct tcp_sock *tp,
const struct sk_buff *skb,
unsigned int cur_mss)
{
u32 end_seq = TCP_SKB_CB(skb)->end_seq;
@@ -1476,7 +1477,7 @@ static unsigned int tcp_snd_test(const struct sock *sk, struct sk_buff *skb,
}
/* Test if sending is allowed right now. */
int tcp_may_send_now(struct sock *sk)
bool tcp_may_send_now(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb = tcp_send_head(sk);
@@ -1546,7 +1547,7 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
*
* This algorithm is from John Heffner.
*/
static int tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
static bool tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
const struct inet_connection_sock *icsk = inet_csk(sk);
@@ -1606,11 +1607,11 @@ static int tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb)
/* Ok, it looks like it is advisable to defer. */
tp->tso_deferred = 1 | (jiffies << 1);
return 1;
return true;
send_now:
tp->tso_deferred = 0;
return 0;
return false;
}
/* Create a new MTU probe if we are ready.
@@ -1752,11 +1753,11 @@ static int tcp_mtu_probe(struct sock *sk)
* snd_up-64k-mss .. snd_up cannot be large. However, taking into
* account rare use of URG, this is not a big flaw.
*
* Returns 1, if no segments are in flight and we have queued segments, but
* cannot send anything now because of SWS or another problem.
* Returns true, if no segments are in flight and we have queued segments,
* but cannot send anything now because of SWS or another problem.
*/
static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
int push_one, gfp_t gfp)
static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
int push_one, gfp_t gfp)
{
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
@@ -1770,7 +1771,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
/* Do MTU probing. */
result = tcp_mtu_probe(sk);
if (!result) {
return 0;
return false;
} else if (result > 0) {
sent_pkts = 1;
}
@@ -1829,7 +1830,7 @@ static int tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
if (likely(sent_pkts)) {
tcp_cwnd_validate(sk);
return 0;
return false;
}
return !tp->packets_out && tcp_send_head(sk);
}
@@ -2028,22 +2029,22 @@ static void tcp_collapse_retrans(struct sock *sk, struct sk_buff *skb)
}
/* Check if coalescing SKBs is legal. */
static int tcp_can_collapse(const struct sock *sk, const struct sk_buff *skb)
static bool tcp_can_collapse(const struct sock *sk, const struct sk_buff *skb)
{
if (tcp_skb_pcount(skb) > 1)
return 0;
return false;
/* TODO: SACK collapsing could be used to remove this condition */
if (skb_shinfo(skb)->nr_frags != 0)
return 0;
return false;
if (skb_cloned(skb))
return 0;
return false;
if (skb == tcp_send_head(sk))
return 0;
return false;
/* Some heurestics for collapsing over SACK'd could be invented */
if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
return 0;
return false;
return 1;
return true;
}
/* Collapse packets in the retransmit queue to make to create
@@ -2054,7 +2055,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *to,
{
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb = to, *tmp;
int first = 1;
bool first = true;
if (!sysctl_tcp_retrans_collapse)
return;
@@ -2068,7 +2069,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *to,
space -= skb->len;
if (first) {
first = 0;
first = false;
continue;
}
@@ -2208,18 +2209,18 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
/* Check if we forward retransmits are possible in the current
* window/congestion state.
*/
static int tcp_can_forward_retransmit(struct sock *sk)
static bool tcp_can_forward_retransmit(struct sock *sk)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
const struct tcp_sock *tp = tcp_sk(sk);
/* Forward retransmissions are possible only during Recovery. */
if (icsk->icsk_ca_state != TCP_CA_Recovery)
return 0;
return false;
/* No forward retransmissions in Reno are possible. */
if (tcp_is_reno(tp))
return 0;
return false;
/* Yeah, we have to make difficult choice between forward transmission
* and retransmission... Both ways have their merits...
@@ -2230,9 +2231,9 @@ static int tcp_can_forward_retransmit(struct sock *sk)
*/
if (tcp_may_send_now(sk))
return 0;
return false;
return 1;
return true;
}
/* This gets called after a retransmit timeout, and the initially