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>
* and worry about wraparound (automatic with unsigned arithmetic).
*/
-static inline int before(__u32 seq1, __u32 seq2)
+static inline bool before(__u32 seq1, __u32 seq2)
{
return (__s32)(seq1-seq2) < 0;
}
#define after(seq2, seq1) before(seq1, seq2)
/* is s2<=s1<=s3 ? */
-static inline int between(__u32 seq1, __u32 seq2, __u32 seq3)
+static inline bool between(__u32 seq1, __u32 seq2, __u32 seq3)
{
return seq3 - seq2 >= seq1 - seq2;
}
}
/* syncookies: no recent synqueue overflow on this listening socket? */
-static inline int tcp_synq_no_recent_overflow(const struct sock *sk)
+static inline bool tcp_synq_no_recent_overflow(const struct sock *sk)
{
unsigned long last_overflow = tcp_sk(sk)->rx_opt.ts_recent_stamp;
return time_after(jiffies, last_overflow + TCP_TIMEOUT_FALLBACK);
struct request_sock **prev);
extern int tcp_child_process(struct sock *parent, struct sock *child,
struct sk_buff *skb);
-extern int tcp_use_frto(struct sock *sk);
+extern bool tcp_use_frto(struct sock *sk);
extern void tcp_enter_frto(struct sock *sk);
extern void tcp_enter_loss(struct sock *sk, int how);
extern void tcp_clear_retrans(struct tcp_sock *tp);
extern void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
int nonagle);
-extern int tcp_may_send_now(struct sock *sk);
+extern bool tcp_may_send_now(struct sock *sk);
extern int tcp_retransmit_skb(struct sock *, struct sk_buff *);
extern void tcp_retransmit_timer(struct sock *sk);
extern void tcp_xmit_retransmit_queue(struct sock *);
extern void tcp_send_fin(struct sock *sk);
extern void tcp_send_active_reset(struct sock *sk, gfp_t priority);
extern int tcp_send_synack(struct sock *);
-extern int tcp_syn_flood_action(struct sock *sk,
- const struct sk_buff *skb,
- const char *proto);
+extern bool tcp_syn_flood_action(struct sock *sk,
+ const struct sk_buff *skb,
+ const char *proto);
extern void tcp_push_one(struct sock *, unsigned int mss_now);
extern void tcp_send_ack(struct sock *sk);
extern void tcp_send_delayed_ack(struct sock *sk);
return tp->rx_opt.sack_ok;
}
-static inline int tcp_is_reno(const struct tcp_sock *tp)
+static inline bool tcp_is_reno(const struct tcp_sock *tp)
{
return !tcp_is_sack(tp);
}
-static inline int tcp_is_fack(const struct tcp_sock *tp)
+static inline bool tcp_is_fack(const struct tcp_sock *tp)
{
return tp->rx_opt.sack_ok & TCP_FACK_ENABLED;
}
{
return tp->snd_una + tp->snd_wnd;
}
-extern int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
+extern bool tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
static inline void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss,
const struct sk_buff *skb)
return __skb_checksum_complete(skb);
}
-static inline int tcp_checksum_complete(struct sk_buff *skb)
+static inline bool tcp_checksum_complete(struct sk_buff *skb)
{
return !skb_csum_unnecessary(skb) &&
__tcp_checksum_complete(skb);
*
* NOTE: is this not too big to inline?
*/
-static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
+static inline bool tcp_prequeue(struct sock *sk, struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
if (sysctl_tcp_low_latency || !tp->ucopy.task)
- return 0;
+ return false;
__skb_queue_tail(&tp->ucopy.prequeue, skb);
tp->ucopy.memory += skb->truesize;
(3 * tcp_rto_min(sk)) / 4,
TCP_RTO_MAX);
}
- return 1;
+ return true;
}
return fin_timeout;
}
-static inline int tcp_paws_check(const struct tcp_options_received *rx_opt,
- int paws_win)
+static inline bool tcp_paws_check(const struct tcp_options_received *rx_opt,
+ int paws_win)
{
if ((s32)(rx_opt->ts_recent - rx_opt->rcv_tsval) <= paws_win)
- return 1;
+ return true;
if (unlikely(get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS))
- return 1;
+ return true;
/*
* Some OSes send SYN and SYNACK messages with tsval=0 tsecr=0,
* then following tcp messages have valid values. Ignore 0 value,
* or else 'negative' tsval might forbid us to accept their packets.
*/
if (!rx_opt->ts_recent)
- return 1;
- return 0;
+ return true;
+ return false;
}
-static inline int tcp_paws_reject(const struct tcp_options_received *rx_opt,
- int rst)
+static inline bool tcp_paws_reject(const struct tcp_options_received *rx_opt,
+ int rst)
{
if (tcp_paws_check(rx_opt, 0))
- return 0;
+ return false;
/* RST segments are not recommended to carry timestamp,
and, if they do, it is recommended to ignore PAWS because
However, we can relax time bounds for RST segments to MSL.
*/
if (rst && get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_MSL)
- return 0;
- return 1;
+ return false;
+ return true;
}
static inline void tcp_mib_init(struct net *net)
__skb_unlink(skb, &sk->sk_write_queue);
}
-static inline int tcp_write_queue_empty(struct sock *sk)
+static inline bool tcp_write_queue_empty(struct sock *sk)
{
return skb_queue_empty(&sk->sk_write_queue);
}
/* Determines whether this is a thin stream (which may suffer from
* increased latency). Used to trigger latency-reducing mechanisms.
*/
-static inline unsigned int tcp_stream_is_thin(struct tcp_sock *tp)
+static inline bool tcp_stream_is_thin(struct tcp_sock *tp)
{
return tp->packets_out < 4 && !tcp_in_initial_slowstart(tp);
}
tp->pushed_seq = tp->write_seq;
}
-static inline int forced_push(const struct tcp_sock *tp)
+static inline bool forced_push(const struct tcp_sock *tp)
{
return after(tp->write_seq, tp->pushed_seq + (tp->max_window >> 1));
}
if (err)
goto do_fault;
} else {
- int merge = 0;
+ bool merge = false;
int i = skb_shinfo(skb)->nr_frags;
struct page *page = sk->sk_sndmsg_page;
int off;
off != PAGE_SIZE) {
/* We can extend the last page
* fragment. */
- merge = 1;
+ merge = true;
} else if (i == MAX_SKB_FRAGS || !sg) {
/* Need to add new fragment and cannot
* do this because interface is non-SG,
void tcp_cleanup_rbuf(struct sock *sk, int copied)
{
struct tcp_sock *tp = tcp_sk(sk);
- int time_to_ack = 0;
+ bool time_to_ack = false;
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
((icsk->icsk_ack.pending & ICSK_ACK_PUSHED) &&
!icsk->icsk_ack.pingpong)) &&
!atomic_read(&sk->sk_rmem_alloc)))
- time_to_ack = 1;
+ time_to_ack = true;
}
/* We send an ACK if we can now advertise a non-zero window
* "Lots" means "at least twice" here.
*/
if (new_window && new_window >= 2 * rcv_window_now)
- time_to_ack = 1;
+ time_to_ack = true;
}
}
if (time_to_ack)
/* These states need RST on ABORT according to RFC793 */
-static inline int tcp_need_reset(int state)
+static inline bool tcp_need_reset(int state)
{
return (1 << state) &
(TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_FIN_WAIT1 |
}
EXPORT_SYMBOL(tcp_disconnect);
-static inline int tcp_can_repair_sock(struct sock *sk)
+static inline bool tcp_can_repair_sock(const struct sock *sk)
{
return capable(CAP_NET_ADMIN) &&
((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_ESTABLISHED));
struct tcp_md5sig_pool __percpu *tcp_alloc_md5sig_pool(struct sock *sk)
{
struct tcp_md5sig_pool __percpu *pool;
- int alloc = 0;
+ bool alloc = false;
retry:
spin_lock_bh(&tcp_md5sig_pool_lock);
pool = tcp_md5sig_pool;
if (tcp_md5sig_users++ == 0) {
- alloc = 1;
+ alloc = true;
spin_unlock_bh(&tcp_md5sig_pool_lock);
} else if (!pool) {
tcp_md5sig_users--;
/* RFC2861 Check whether we are limited by application or congestion window
* This is the inverse of cwnd check in tcp_tso_should_defer
*/
-int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
+bool tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
{
const struct tcp_sock *tp = tcp_sk(sk);
u32 left;
if (in_flight >= tp->snd_cwnd)
- return 1;
+ return true;
left = tp->snd_cwnd - in_flight;
if (sk_can_gso(sk) &&
left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd &&
left * tp->mss_cache < sk->sk_gso_max_size)
- return 1;
+ return true;
return left <= tcp_max_tso_deferred_mss(tp);
}
EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited);
/* Tcp Hybla structure. */
struct hybla {
- u8 hybla_en;
+ bool hybla_en;
u32 snd_cwnd_cents; /* Keeps increment values when it is <1, <<7 */
u32 rho; /* Rho parameter, integer part */
u32 rho2; /* Rho * Rho, integer part */
u32 minrtt; /* Minimum smoothed round trip time value seen */
};
-/* Hybla reference round trip time (default= 1/40 sec = 25 ms),
- expressed in jiffies */
+/* Hybla reference round trip time (default= 1/40 sec = 25 ms), in ms */
static int rtt0 = 25;
module_param(rtt0, int, 0644);
MODULE_PARM_DESC(rtt0, "reference rout trip time (ms)");
ca->rho_3ls = max_t(u32, tcp_sk(sk)->srtt / msecs_to_jiffies(rtt0), 8);
ca->rho = ca->rho_3ls >> 3;
ca->rho2_7ls = (ca->rho_3ls * ca->rho_3ls) << 1;
- ca->rho2 = ca->rho2_7ls >>7;
+ ca->rho2 = ca->rho2_7ls >> 7;
}
static void hybla_init(struct sock *sk)
ca->rho_3ls = 0;
ca->rho2_7ls = 0;
ca->snd_cwnd_cents = 0;
- ca->hybla_en = 1;
+ ca->hybla_en = true;
tp->snd_cwnd = 2;
tp->snd_cwnd_clamp = 65535;
static void hybla_state(struct sock *sk, u8 ca_state)
{
struct hybla *ca = inet_csk_ca(sk);
+
ca->hybla_en = (ca_state == TCP_CA_Open);
}
* and the session is not interactive.
*/
-static inline int tcp_in_quickack_mode(const struct sock *sk)
+static inline bool tcp_in_quickack_mode(const struct sock *sk)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
+
return icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong;
}
tp->ecn_flags &= ~TCP_ECN_OK;
}
-static inline int TCP_ECN_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th)
+static bool TCP_ECN_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th)
{
if (th->ece && !th->syn && (tp->ecn_flags & TCP_ECN_OK))
- return 1;
- return 0;
+ return true;
+ return false;
}
/* Buffer size and advertised window tuning.
* the exact amount is rather hard to quantify. However, tp->max_window can
* be used as an exaggerated estimate.
*/
-static int tcp_is_sackblock_valid(struct tcp_sock *tp, int is_dsack,
- u32 start_seq, u32 end_seq)
+static bool tcp_is_sackblock_valid(struct tcp_sock *tp, bool is_dsack,
+ u32 start_seq, u32 end_seq)
{
/* Too far in future, or reversed (interpretation is ambiguous) */
if (after(end_seq, tp->snd_nxt) || !before(start_seq, end_seq))
- return 0;
+ return false;
/* Nasty start_seq wrap-around check (see comments above) */
if (!before(start_seq, tp->snd_nxt))
- return 0;
+ return false;
/* In outstanding window? ...This is valid exit for D-SACKs too.
* start_seq == snd_una is non-sensical (see comments above)
*/
if (after(start_seq, tp->snd_una))
- return 1;
+ return true;
if (!is_dsack || !tp->undo_marker)
- return 0;
+ return false;
/* ...Then it's D-SACK, and must reside below snd_una completely */
if (after(end_seq, tp->snd_una))
- return 0;
+ return false;
if (!before(start_seq, tp->undo_marker))
- return 1;
+ return true;
/* Too old */
if (!after(end_seq, tp->undo_marker))
- return 0;
+ return false;
/* Undo_marker boundary crossing (overestimates a lot). Known already:
* start_seq < undo_marker and end_seq >= undo_marker.
tp->lost_retrans_low = new_low_seq;
}
-static int tcp_check_dsack(struct sock *sk, const struct sk_buff *ack_skb,
- struct tcp_sack_block_wire *sp, int num_sacks,
- u32 prior_snd_una)
+static bool tcp_check_dsack(struct sock *sk, const struct sk_buff *ack_skb,
+ struct tcp_sack_block_wire *sp, int num_sacks,
+ u32 prior_snd_una)
{
struct tcp_sock *tp = tcp_sk(sk);
u32 start_seq_0 = get_unaligned_be32(&sp[0].start_seq);
u32 end_seq_0 = get_unaligned_be32(&sp[0].end_seq);
- int dup_sack = 0;
+ bool dup_sack = false;
if (before(start_seq_0, TCP_SKB_CB(ack_skb)->ack_seq)) {
- dup_sack = 1;
+ dup_sack = true;
tcp_dsack_seen(tp);
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPDSACKRECV);
} else if (num_sacks > 1) {
if (!after(end_seq_0, end_seq_1) &&
!before(start_seq_0, start_seq_1)) {
- dup_sack = 1;
+ dup_sack = true;
tcp_dsack_seen(tp);
NET_INC_STATS_BH(sock_net(sk),
LINUX_MIB_TCPDSACKOFORECV);
* FIXME: this could be merged to shift decision code
*/
static int tcp_match_skb_to_sack(struct sock *sk, struct sk_buff *skb,
- u32 start_seq, u32 end_seq)
+ u32 start_seq, u32 end_seq)
{
- int in_sack, err;
+ int err;
+ bool in_sack;
unsigned int pkt_len;
unsigned int mss;
static u8 tcp_sacktag_one(struct sock *sk,
struct tcp_sacktag_state *state, u8 sacked,
u32 start_seq, u32 end_seq,
- int dup_sack, int pcount)
+ bool dup_sack, int pcount)
{
struct tcp_sock *tp = tcp_sk(sk);
int fack_count = state->fack_count;
/* Shift newly-SACKed bytes from this skb to the immediately previous
* already-SACKed sk_buff. Mark the newly-SACKed bytes as such.
*/
-static int tcp_shifted_skb(struct sock *sk, struct sk_buff *skb,
- struct tcp_sacktag_state *state,
- unsigned int pcount, int shifted, int mss,
- int dup_sack)
+static bool tcp_shifted_skb(struct sock *sk, struct sk_buff *skb,
+ struct tcp_sacktag_state *state,
+ unsigned int pcount, int shifted, int mss,
+ bool dup_sack)
{
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *prev = tcp_write_queue_prev(sk, skb);
if (skb->len > 0) {
BUG_ON(!tcp_skb_pcount(skb));
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKSHIFTED);
- return 0;
+ return false;
}
/* Whole SKB was eaten :-) */
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SACKMERGED);
- return 1;
+ return true;
}
/* I wish gso_size would have a bit more sane initialization than
static struct sk_buff *tcp_shift_skb_data(struct sock *sk, struct sk_buff *skb,
struct tcp_sacktag_state *state,
u32 start_seq, u32 end_seq,
- int dup_sack)
+ bool dup_sack)
{
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *prev;
struct tcp_sack_block *next_dup,
struct tcp_sacktag_state *state,
u32 start_seq, u32 end_seq,
- int dup_sack_in)
+ bool dup_sack_in)
{
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *tmp;
tcp_for_write_queue_from(skb, sk) {
int in_sack = 0;
- int dup_sack = dup_sack_in;
+ bool dup_sack = dup_sack_in;
if (skb == tcp_send_head(sk))
break;
next_dup->start_seq,
next_dup->end_seq);
if (in_sack > 0)
- dup_sack = 1;
+ dup_sack = true;
}
/* skb reference here is a bit tricky to get right, since
struct sk_buff *skb;
int num_sacks = min(TCP_NUM_SACKS, (ptr[1] - TCPOLEN_SACK_BASE) >> 3);
int used_sacks;
- int found_dup_sack = 0;
+ bool found_dup_sack = false;
int i, j;
int first_sack_index;
used_sacks = 0;
first_sack_index = 0;
for (i = 0; i < num_sacks; i++) {
- int dup_sack = !i && found_dup_sack;
+ bool dup_sack = !i && found_dup_sack;
sp[used_sacks].start_seq = get_unaligned_be32(&sp_wire[i].start_seq);
sp[used_sacks].end_seq = get_unaligned_be32(&sp_wire[i].end_seq);
while (i < used_sacks) {
u32 start_seq = sp[i].start_seq;
u32 end_seq = sp[i].end_seq;
- int dup_sack = (found_dup_sack && (i == first_sack_index));
+ bool dup_sack = (found_dup_sack && (i == first_sack_index));
struct tcp_sack_block *next_dup = NULL;
if (found_dup_sack && ((i + 1) == first_sack_index))
}
/* Limits sacked_out so that sum with lost_out isn't ever larger than
- * packets_out. Returns zero if sacked_out adjustement wasn't necessary.
+ * packets_out. Returns false if sacked_out adjustement wasn't necessary.
*/
-static int tcp_limit_reno_sacked(struct tcp_sock *tp)
+static bool tcp_limit_reno_sacked(struct tcp_sock *tp)
{
u32 holes;
if ((tp->sacked_out + holes) > tp->packets_out) {
tp->sacked_out = tp->packets_out - holes;
- return 1;
+ return true;
}
- return 0;
+ return false;
}
/* If we receive more dupacks than we expected counting segments
/* F-RTO can only be used if TCP has never retransmitted anything other than
* head (SACK enhanced variant from Appendix B of RFC4138 is more robust here)
*/
-int tcp_use_frto(struct sock *sk)
+bool tcp_use_frto(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
const struct inet_connection_sock *icsk = inet_csk(sk);
struct sk_buff *skb;
if (!sysctl_tcp_frto)
- return 0;
+ return false;
/* MTU probe and F-RTO won't really play nicely along currently */
if (icsk->icsk_mtup.probe_size)
- return 0;
+ return false;
if (tcp_is_sackfrto(tp))
- return 1;
+ return true;
/* Avoid expensive walking of rexmit queue if possible */
if (tp->retrans_out > 1)
- return 0;
+ return false;
skb = tcp_write_queue_head(sk);
if (tcp_skb_is_last(sk, skb))
- return 1;
+ return true;
skb = tcp_write_queue_next(sk, skb); /* Skips head */
tcp_for_write_queue_from(skb, sk) {
if (skb == tcp_send_head(sk))
break;
if (TCP_SKB_CB(skb)->sacked & TCPCB_RETRANS)
- return 0;
+ return false;
/* Short-circuit when first non-SACKed skb has been checked */
if (!(TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED))
break;
}
- return 1;
+ return true;
}
/* RTO occurred, but do not yet enter Loss state. Instead, defer RTO
*
* Do processing similar to RTO timeout.
*/
-static int tcp_check_sack_reneging(struct sock *sk, int flag)
+static bool tcp_check_sack_reneging(struct sock *sk, int flag)
{
if (flag & FLAG_SACK_RENEGING) {
struct inet_connection_sock *icsk = inet_csk(sk);
tcp_retransmit_skb(sk, tcp_write_queue_head(sk));
inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
icsk->icsk_rto, TCP_RTO_MAX);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
static inline int tcp_fackets_out(const struct tcp_sock *tp)
* Main question: may we further continue forward transmission
* with the same cwnd?
*/
-static int tcp_time_to_recover(struct sock *sk, int flag)
+static bool tcp_time_to_recover(struct sock *sk, int flag)
{
struct tcp_sock *tp = tcp_sk(sk);
__u32 packets_out;
/* Do not perform any recovery during F-RTO algorithm */
if (tp->frto_counter)
- return 0;
+ return false;
/* Trick#1: The loss is proven. */
if (tp->lost_out)
- return 1;
+ return true;
/* Not-A-Trick#2 : Classic rule... */
if (tcp_dupack_heuristics(tp) > tp->reordering)
- return 1;
+ return true;
/* Trick#3 : when we use RFC2988 timer restart, fast
* retransmit can be triggered by timeout of queue head.
*/
if (tcp_is_fack(tp) && tcp_head_timedout(sk))
- return 1;
+ return true;
/* Trick#4: It is still not OK... But will it be useful to delay
* recovery more?
/* We have nothing to send. This connection is limited
* either by receiver window or by application.
*/
- return 1;
+ return true;
}
/* If a thin stream is detected, retransmit after first
if ((tp->thin_dupack || sysctl_tcp_thin_dupack) &&
tcp_stream_is_thin(tp) && tcp_dupack_heuristics(tp) > 1 &&
tcp_is_sack(tp) && !tcp_send_head(sk))
- return 1;
+ return true;
/* Trick#6: TCP early retransmit, per RFC5827. To avoid spurious
* retransmissions due to small network reorderings, we implement
!tcp_may_send_now(sk))
return !tcp_pause_early_retransmit(sk, flag);
- return 0;
+ return false;
}
/* New heuristics: it is possible only after we switched to restart timer
}
/* People celebrate: "We love our President!" */
-static int tcp_try_undo_recovery(struct sock *sk)
+static bool tcp_try_undo_recovery(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
* is ACKed. For Reno it is MUST to prevent false
* fast retransmits (RFC2582). SACK TCP is safe. */
tcp_moderate_cwnd(tp);
- return 1;
+ return true;
}
tcp_set_ca_state(sk, TCP_CA_Open);
- return 0;
+ return false;
}
/* Try to undo cwnd reduction, because D-SACKs acked all retransmitted data */
* that successive retransmissions of a segment must not advance
* retrans_stamp under any conditions.
*/
-static int tcp_any_retrans_done(const struct sock *sk)
+static bool tcp_any_retrans_done(const struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
if (tp->retrans_out)
- return 1;
+ return true;
skb = tcp_write_queue_head(sk);
if (unlikely(skb && TCP_SKB_CB(skb)->sacked & TCPCB_EVER_RETRANS))
- return 1;
+ return true;
- return 0;
+ return false;
}
/* Undo during fast recovery after partial ACK. */
}
/* Undo during loss recovery after partial ACK. */
-static int tcp_try_undo_loss(struct sock *sk)
+static bool tcp_try_undo_loss(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
tp->undo_marker = 0;
if (tcp_is_sack(tp))
tcp_set_ca_state(sk, TCP_CA_Open);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
static inline void tcp_complete_cwr(struct sock *sk)
const struct inet_connection_sock *icsk = inet_csk(sk);
struct sk_buff *skb;
u32 now = tcp_time_stamp;
- int fully_acked = 1;
+ int fully_acked = true;
int flag = 0;
u32 pkts_acked = 0;
u32 reord = tp->packets_out;
if (!acked_pcount)
break;
- fully_acked = 0;
+ fully_acked = false;
} else {
acked_pcount = tcp_skb_pcount(skb);
}
* to prove that the RTO is indeed spurious. It transfers the control
* from F-RTO to the conventional RTO recovery
*/
-static int tcp_process_frto(struct sock *sk, int flag)
+static bool tcp_process_frto(struct sock *sk, int flag)
{
struct tcp_sock *tp = tcp_sk(sk);
if (!before(tp->snd_una, tp->frto_highmark)) {
tcp_enter_frto_loss(sk, (tp->frto_counter == 1 ? 2 : 3), flag);
- return 1;
+ return true;
}
if (!tcp_is_sackfrto(tp)) {
* data, winupdate
*/
if (!(flag & FLAG_ANY_PROGRESS) && (flag & FLAG_NOT_DUP))
- return 1;
+ return true;
if (!(flag & FLAG_DATA_ACKED)) {
tcp_enter_frto_loss(sk, (tp->frto_counter == 1 ? 0 : 3),
flag);
- return 1;
+ return true;
}
} else {
if (!(flag & FLAG_DATA_ACKED) && (tp->frto_counter == 1)) {
/* Prevent sending of new data. */
tp->snd_cwnd = min(tp->snd_cwnd,
tcp_packets_in_flight(tp));
- return 1;
+ return true;
}
if ((tp->frto_counter >= 2) &&
/* RFC4138 shortcoming (see comment above) */
if (!(flag & FLAG_FORWARD_PROGRESS) &&
(flag & FLAG_NOT_DUP))
- return 1;
+ return true;
tcp_enter_frto_loss(sk, 3, flag);
- return 1;
+ return true;
}
}
if (!tcp_may_send_now(sk))
tcp_enter_frto_loss(sk, 2, flag);
- return 1;
+ return true;
} else {
switch (sysctl_tcp_frto_response) {
case 2:
tp->undo_marker = 0;
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSPURIOUSRTOS);
}
- return 0;
+ return false;
}
/* This routine deals with incoming acks, but not outgoing ones. */
int prior_sacked = tp->sacked_out;
int pkts_acked = 0;
int newly_acked_sacked = 0;
- int frto_cwnd = 0;
+ bool frto_cwnd = false;
/* If the ack is older than previous acks
* then we can probably ignore it.
}
EXPORT_SYMBOL(tcp_parse_options);
-static int tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th)
+static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th)
{
const __be32 *ptr = (const __be32 *)(th + 1);
tp->rx_opt.rcv_tsval = ntohl(*ptr);
++ptr;
tp->rx_opt.rcv_tsecr = ntohl(*ptr);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
/* Fast parse options. This hopes to only see timestamps.
* If it is wrong it falls back on tcp_parse_options().
*/
-static int tcp_fast_parse_options(const struct sk_buff *skb,
- const struct tcphdr *th,
- struct tcp_sock *tp, const u8 **hvpp)
+static bool tcp_fast_parse_options(const struct sk_buff *skb,
+ const struct tcphdr *th,
+ struct tcp_sock *tp, const u8 **hvpp)
{
/* In the spirit of fast parsing, compare doff directly to constant
* values. Because equality is used, short doff can be ignored here.
*/
if (th->doff == (sizeof(*th) / 4)) {
tp->rx_opt.saw_tstamp = 0;
- return 0;
+ return false;
} else if (tp->rx_opt.tstamp_ok &&
th->doff == ((sizeof(*th) + TCPOLEN_TSTAMP_ALIGNED) / 4)) {
if (tcp_parse_aligned_timestamp(tp, th))
- return 1;
+ return true;
}
tcp_parse_options(skb, &tp->rx_opt, hvpp, 1);
- return 1;
+ return true;
}
#ifdef CONFIG_TCP_MD5SIG
}
}
-static inline int tcp_sack_extend(struct tcp_sack_block *sp, u32 seq,
+static inline bool tcp_sack_extend(struct tcp_sack_block *sp, u32 seq,
u32 end_seq)
{
if (!after(seq, sp->end_seq) && !after(sp->start_seq, end_seq)) {
sp->start_seq = seq;
if (after(end_seq, sp->end_seq))
sp->end_seq = end_seq;
- return 1;
+ return true;
}
- return 0;
+ return false;
}
static void tcp_dsack_set(struct sock *sk, u32 seq, u32 end_seq)
}
}
-static int tcp_prune_ofo_queue(struct sock *sk);
+static bool tcp_prune_ofo_queue(struct sock *sk);
static int tcp_prune_queue(struct sock *sk);
static int tcp_try_rmem_schedule(struct sock *sk, unsigned int size)
* Purge the out-of-order queue.
* Return true if queue was pruned.
*/
-static int tcp_prune_ofo_queue(struct sock *sk)
+static bool tcp_prune_ofo_queue(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- int res = 0;
+ bool res = false;
if (!skb_queue_empty(&tp->out_of_order_queue)) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_OFOPRUNED);
if (tp->rx_opt.sack_ok)
tcp_sack_reset(&tp->rx_opt);
sk_mem_reclaim(sk);
- res = 1;
+ res = true;
}
return res;
}
tp->snd_cwnd_stamp = tcp_time_stamp;
}
-static int tcp_should_expand_sndbuf(const struct sock *sk)
+static bool tcp_should_expand_sndbuf(const struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
* not modify it.
*/
if (sk->sk_userlocks & SOCK_SNDBUF_LOCK)
- return 0;
+ return false;
/* If we are under global TCP memory pressure, do not expand. */
if (sk_under_memory_pressure(sk))
- return 0;
+ return false;
/* If we are under soft global TCP memory pressure, do not expand. */
if (sk_memory_allocated(sk) >= sk_prot_mem_limits(sk, 0))
- return 0;
+ return false;
/* If we filled the congestion window, do not expand. */
if (tp->packets_out >= tp->snd_cwnd)
- return 0;
+ return false;
- return 1;
+ return true;
}
/* When incoming ACK allowed to free some skb from write_queue,
}
#ifdef CONFIG_NET_DMA
-static int tcp_dma_try_early_copy(struct sock *sk, struct sk_buff *skb,
+static bool tcp_dma_try_early_copy(struct sock *sk, struct sk_buff *skb,
int hlen)
{
struct tcp_sock *tp = tcp_sk(sk);
int chunk = skb->len - hlen;
int dma_cookie;
- int copied_early = 0;
+ bool copied_early = false;
if (tp->ucopy.wakeup)
- return 0;
+ return false;
if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
tp->ucopy.dma_chan = net_dma_find_channel();
goto out;
tp->ucopy.dma_cookie = dma_cookie;
- copied_early = 1;
+ copied_early = true;
tp->ucopy.len -= chunk;
tp->copied_seq += chunk;
}
/*
- * Return 1 if a syncookie should be sent
+ * Return true if a syncookie should be sent
*/
-int tcp_syn_flood_action(struct sock *sk,
+bool tcp_syn_flood_action(struct sock *sk,
const struct sk_buff *skb,
const char *proto)
{
const char *msg = "Dropping request";
- int want_cookie = 0;
+ bool want_cookie = false;
struct listen_sock *lopt;
#ifdef CONFIG_SYN_COOKIES
if (sysctl_tcp_syncookies) {
msg = "Sending cookies";
- want_cookie = 1;
+ want_cookie = true;
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES);
} else
#endif
}
EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
-static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
+static bool tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
{
/*
* This gets called for each TCP segment that arrives
/* We've parsed the options - do we have a hash? */
if (!hash_expected && !hash_location)
- return 0;
+ return false;
if (hash_expected && !hash_location) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
- return 1;
+ return true;
}
if (!hash_expected && hash_location) {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
- return 1;
+ return true;
}
/* Okay, so this is hash_expected and hash_location -
&iph->daddr, ntohs(th->dest),
genhash ? " tcp_v4_calc_md5_hash failed"
: "");
- return 1;
+ return true;
}
- return 0;
+ return false;
}
#endif
__be32 saddr = ip_hdr(skb)->saddr;
__be32 daddr = ip_hdr(skb)->daddr;
__u32 isn = TCP_SKB_CB(skb)->when;
- int want_cookie = 0;
+ bool want_cookie = false;
/* Never answer to SYNs send to broadcast or multicast */
if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
while (l-- > 0)
*c++ ^= *hash_location++;
- want_cookie = 0; /* not our kind of cookie */
+ want_cookie = false; /* not our kind of cookie */
tmp_ext.cookie_out_never = 0; /* false */
tmp_ext.cookie_plus = tmp_opt.cookie_plus;
} else if (!tp->rx_opt.cookie_in_always) {
return rc;
}
-static inline int empty_bucket(struct tcp_iter_state *st)
+static inline bool empty_bucket(struct tcp_iter_state *st)
{
return hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].chain) &&
hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].twchain);
* state.
*/
-static int tcp_remember_stamp(struct sock *sk)
+static bool tcp_remember_stamp(struct sock *sk)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
}
if (release_it)
inet_putpeer(peer);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
-static int tcp_tw_remember_stamp(struct inet_timewait_sock *tw)
+static bool tcp_tw_remember_stamp(struct inet_timewait_sock *tw)
{
struct sock *sk = (struct sock *) tw;
struct inet_peer *peer;
peer->tcp_ts = tcptw->tw_ts_recent;
}
inet_putpeer(peer);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
-static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
+static bool tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
{
if (seq == s_win)
- return 1;
+ return true;
if (after(end_seq, s_win) && before(seq, e_win))
- return 1;
+ return true;
return seq == e_win && seq == end_seq;
}
struct tcp_options_received tmp_opt;
const u8 *hash_location;
struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
- int paws_reject = 0;
+ bool paws_reject = false;
tmp_opt.saw_tstamp = 0;
if (th->doff > (sizeof(*th) >> 2) && tcptw->tw_ts_recent_stamp) {
struct inet_timewait_sock *tw = NULL;
const struct inet_connection_sock *icsk = inet_csk(sk);
const struct tcp_sock *tp = tcp_sk(sk);
- int recycle_ok = 0;
+ bool recycle_ok = false;
if (tcp_death_row.sysctl_tw_recycle && tp->rx_opt.ts_recent_stamp)
recycle_ok = tcp_remember_stamp(sk);
struct sock *child;
const struct tcphdr *th = tcp_hdr(skb);
__be32 flg = tcp_flag_word(th) & (TCP_FLAG_RST|TCP_FLAG_SYN|TCP_FLAG_ACK);
- int paws_reject = 0;
+ bool paws_reject = false;
tmp_opt.saw_tstamp = 0;
if (th->doff > (sizeof(struct tcphdr)>>2)) {
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;
}
}
/* 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)
{
(!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).
* 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;
}
/* 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);
*
* 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);
/* 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.
* 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;
/* Do MTU probing. */
result = tcp_mtu_probe(sk);
if (!result) {
- return 0;
+ return false;
} else if (result > 0) {
sent_pkts = 1;
}
if (likely(sent_pkts)) {
tcp_cwnd_validate(sk);
- return 0;
+ return false;
}
return !tp->packets_out && tcp_send_head(sk);
}
}
/* 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
{
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;
space -= skb->len;
if (first) {
- first = 0;
+ first = false;
continue;
}
/* 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...
*/
if (tcp_may_send_now(sk))
- return 0;
+ return false;
- return 1;
+ return true;
}
/* This gets called after a retransmit timeout, and the initially
struct tcp_sock *tp = tcp_sk(sk);
__u32 isn = TCP_SKB_CB(skb)->when;
struct dst_entry *dst = NULL;
- int want_cookie = 0;
+ bool want_cookie = false;
if (skb->protocol == htons(ETH_P_IP))
return tcp_v4_conn_request(sk, skb);
while (l-- > 0)
*c++ ^= *hash_location++;
- want_cookie = 0; /* not our kind of cookie */
+ want_cookie = false; /* not our kind of cookie */
tmp_ext.cookie_out_never = 0; /* false */
tmp_ext.cookie_plus = tmp_opt.cookie_plus;
} else if (!tp->rx_opt.cookie_in_always) {
projects / profile / ivi / kernel-x86-ivi.git / commitdiff