mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 21:38:32 +08:00
dccp: Initialisation and type-checking of feature sysctls
This patch takes care of initialising and type-checking sysctls related to feature negotiation. Type checking is important since some of the sysctls now directly act on the feature-negotiation process. The sysctls are initialised with the known default values for each feature. For the type-checking the value constraints from RFC 4340 are used: * Sequence Window uses the specified Wmin=32, the maximum is ulong (4 bytes), tested and confirmed that it works up to 4294967295 - for Gbps speed; * Ack Ratio is between 0 .. 0xffff (2-byte unsigned integer); * CCIDs are between 0 .. 255; * request_retries, retries1, retries2 also between 0..255 for good measure; * tx_qlen is checked to be non-negative; * sync_ratelimit remains as before. Further changes: ---------------- Performed s@sysctl_dccp_feat@sysctl_dccp@g since the sysctls are now in feat.c. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
This commit is contained in:
Gerrit Renker
parent
51c7d4fa26
commit
0a4822679d
@ -355,14 +355,6 @@ static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
|
||||
return __dccp_hdr_len(dccp_hdr(skb));
|
||||
}
|
||||
|
||||
|
||||
/* initial values for each feature */
|
||||
#define DCCPF_INITIAL_SEQUENCE_WINDOW 100
|
||||
#define DCCPF_INITIAL_ACK_RATIO 2
|
||||
#define DCCPF_INITIAL_CCID DCCPC_CCID2
|
||||
/* FIXME: for now we're default to 1 but it should really be 0 */
|
||||
#define DCCPF_INITIAL_SEND_NDP_COUNT 1
|
||||
|
||||
/**
|
||||
* struct dccp_request_sock - represent DCCP-specific connection request
|
||||
* @dreq_inet_rsk: structure inherited from
|
||||
|
||||
@ -95,9 +95,6 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo);
|
||||
extern int sysctl_dccp_request_retries;
|
||||
extern int sysctl_dccp_retries1;
|
||||
extern int sysctl_dccp_retries2;
|
||||
extern int sysctl_dccp_feat_sequence_window;
|
||||
extern int sysctl_dccp_feat_rx_ccid;
|
||||
extern int sysctl_dccp_feat_tx_ccid;
|
||||
extern int sysctl_dccp_tx_qlen;
|
||||
extern int sysctl_dccp_sync_ratelimit;
|
||||
|
||||
|
||||
@ -26,6 +26,11 @@
|
||||
#include "ccid.h"
|
||||
#include "feat.h"
|
||||
|
||||
/* feature-specific sysctls - initialised to the defaults from RFC 4340, 6.4 */
|
||||
unsigned long sysctl_dccp_sequence_window __read_mostly = 100;
|
||||
int sysctl_dccp_rx_ccid __read_mostly = 2,
|
||||
sysctl_dccp_tx_ccid __read_mostly = 2;
|
||||
|
||||
/*
|
||||
* Feature activation handlers.
|
||||
*
|
||||
@ -1141,7 +1146,7 @@ int dccp_feat_init(struct sock *sk)
|
||||
|
||||
/* Non-negotiable (NN) features */
|
||||
rc = __feat_register_nn(fn, DCCPF_SEQUENCE_WINDOW, 0,
|
||||
sysctl_dccp_feat_sequence_window);
|
||||
sysctl_dccp_sequence_window);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
@ -1172,8 +1177,8 @@ int dccp_feat_init(struct sock *sk)
|
||||
if (ccid_request_modules(tx.val, tx.len))
|
||||
goto free_ccid_lists;
|
||||
|
||||
if (!dccp_feat_prefer(sysctl_dccp_feat_tx_ccid, tx.val, tx.len) ||
|
||||
!dccp_feat_prefer(sysctl_dccp_feat_rx_ccid, rx.val, rx.len))
|
||||
if (!dccp_feat_prefer(sysctl_dccp_tx_ccid, tx.val, tx.len) ||
|
||||
!dccp_feat_prefer(sysctl_dccp_rx_ccid, rx.val, rx.len))
|
||||
goto free_ccid_lists;
|
||||
|
||||
rc = __feat_register_sp(fn, DCCPF_CCID, true, false, tx.val, tx.len);
|
||||
|
||||
@ -99,6 +99,13 @@ struct ccid_dependency {
|
||||
u8 val;
|
||||
};
|
||||
|
||||
/*
|
||||
* Sysctls to seed defaults for feature negotiation
|
||||
*/
|
||||
extern unsigned long sysctl_dccp_sequence_window;
|
||||
extern int sysctl_dccp_rx_ccid;
|
||||
extern int sysctl_dccp_tx_ccid;
|
||||
|
||||
#ifdef CONFIG_IP_DCCP_DEBUG
|
||||
extern const char *dccp_feat_typename(const u8 type);
|
||||
extern const char *dccp_feat_name(const u8 feat);
|
||||
@ -113,6 +120,7 @@ static inline void dccp_feat_debug(const u8 type, const u8 feat, const u8 val)
|
||||
#endif /* CONFIG_IP_DCCP_DEBUG */
|
||||
|
||||
extern int dccp_feat_init(struct sock *sk);
|
||||
extern void dccp_feat_initialise_sysctls(void);
|
||||
extern int dccp_feat_register_sp(struct sock *sk, u8 feat, u8 is_local,
|
||||
u8 const *list, u8 len);
|
||||
extern int dccp_feat_register_nn(struct sock *sk, u8 feat, u64 val);
|
||||
|
||||
@ -23,10 +23,6 @@
|
||||
#include "dccp.h"
|
||||
#include "feat.h"
|
||||
|
||||
int sysctl_dccp_feat_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW;
|
||||
int sysctl_dccp_feat_rx_ccid = DCCPF_INITIAL_CCID;
|
||||
int sysctl_dccp_feat_tx_ccid = DCCPF_INITIAL_CCID;
|
||||
|
||||
u64 dccp_decode_value_var(const u8 *bf, const u8 len)
|
||||
{
|
||||
u64 value = 0;
|
||||
|
||||
@ -18,55 +18,72 @@
|
||||
#error This file should not be compiled without CONFIG_SYSCTL defined
|
||||
#endif
|
||||
|
||||
/* Boundary values */
|
||||
static int zero = 0,
|
||||
u8_max = 0xFF;
|
||||
static unsigned long seqw_min = 32;
|
||||
|
||||
static struct ctl_table dccp_default_table[] = {
|
||||
{
|
||||
.procname = "seq_window",
|
||||
.data = &sysctl_dccp_feat_sequence_window,
|
||||
.maxlen = sizeof(sysctl_dccp_feat_sequence_window),
|
||||
.data = &sysctl_dccp_sequence_window,
|
||||
.maxlen = sizeof(sysctl_dccp_sequence_window),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_doulongvec_minmax,
|
||||
.extra1 = &seqw_min, /* RFC 4340, 7.5.2 */
|
||||
},
|
||||
{
|
||||
.procname = "rx_ccid",
|
||||
.data = &sysctl_dccp_feat_rx_ccid,
|
||||
.maxlen = sizeof(sysctl_dccp_feat_rx_ccid),
|
||||
.data = &sysctl_dccp_rx_ccid,
|
||||
.maxlen = sizeof(sysctl_dccp_rx_ccid),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &u8_max, /* RFC 4340, 10. */
|
||||
},
|
||||
{
|
||||
.procname = "tx_ccid",
|
||||
.data = &sysctl_dccp_feat_tx_ccid,
|
||||
.maxlen = sizeof(sysctl_dccp_feat_tx_ccid),
|
||||
.data = &sysctl_dccp_tx_ccid,
|
||||
.maxlen = sizeof(sysctl_dccp_tx_ccid),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &u8_max, /* RFC 4340, 10. */
|
||||
},
|
||||
{
|
||||
.procname = "request_retries",
|
||||
.data = &sysctl_dccp_request_retries,
|
||||
.maxlen = sizeof(sysctl_dccp_request_retries),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &u8_max,
|
||||
},
|
||||
{
|
||||
.procname = "retries1",
|
||||
.data = &sysctl_dccp_retries1,
|
||||
.maxlen = sizeof(sysctl_dccp_retries1),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &u8_max,
|
||||
},
|
||||
{
|
||||
.procname = "retries2",
|
||||
.data = &sysctl_dccp_retries2,
|
||||
.maxlen = sizeof(sysctl_dccp_retries2),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &u8_max,
|
||||
},
|
||||
{
|
||||
.procname = "tx_qlen",
|
||||
.data = &sysctl_dccp_tx_qlen,
|
||||
.maxlen = sizeof(sysctl_dccp_tx_qlen),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
.proc_handler = proc_dointvec_minmax,
|
||||
.extra1 = &zero,
|
||||
},
|
||||
{
|
||||
.procname = "sync_ratelimit",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user