net: sctp: convert sctp_checksum_disable module param into sctp sysctl

Get rid of the last module parameter for SCTP and make this
configurable via sysctl for SCTP like all the rest of SCTP's
configuration knobs.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2013-08-06 21:18:12 +02:00 committed by David S. Miller
parent 2690048c01
commit cda5f98e36
7 changed files with 29 additions and 11 deletions

View file

@ -1507,6 +1507,14 @@ sack_timeout - INTEGER
Default: 200
checksum_disable - BOOLEAN
Disable SCTP checksum computing and verification for debugging purpose.
1: Disable checksumming
0: Enable checksumming
Default: 0
valid_cookie_life - INTEGER
The default lifetime of the SCTP cookie (in milliseconds). The cookie
is used during association establishment.

View file

@ -129,6 +129,9 @@ struct netns_sctp {
/* Threshold for autoclose timeout, in seconds. */
unsigned long max_autoclose;
/* Flag to disable SCTP checksumming. */
int checksum_disable;
};
#endif /* __NETNS_SCTP_H__ */

View file

@ -141,10 +141,6 @@ extern struct sctp_globals {
/* This is the sctp port control hash. */
int port_hashsize;
struct sctp_bind_hashbucket *port_hashtable;
/* Flag to indicate whether computing and verifying checksum
* is disabled. */
bool checksum_disable;
} sctp_globals;
#define sctp_max_instreams (sctp_globals.max_instreams)
@ -156,7 +152,6 @@ extern struct sctp_globals {
#define sctp_assoc_hashtable (sctp_globals.assoc_hashtable)
#define sctp_port_hashsize (sctp_globals.port_hashsize)
#define sctp_port_hashtable (sctp_globals.port_hashtable)
#define sctp_checksum_disable (sctp_globals.checksum_disable)
/* SCTP Socket type: UDP or TCP style. */
typedef enum {

View file

@ -140,8 +140,8 @@ int sctp_rcv(struct sk_buff *skb)
__skb_pull(skb, skb_transport_offset(skb));
if (skb->len < sizeof(struct sctphdr))
goto discard_it;
if (!sctp_checksum_disable && !skb_csum_unnecessary(skb) &&
sctp_rcv_checksum(net, skb) < 0)
if (!net->sctp.checksum_disable && !skb_csum_unnecessary(skb) &&
sctp_rcv_checksum(net, skb) < 0)
goto discard_it;
skb_pull(skb, sizeof(struct sctphdr));

View file

@ -395,6 +395,7 @@ int sctp_packet_transmit(struct sctp_packet *packet)
int padding; /* How much padding do we need? */
__u8 has_data = 0;
struct dst_entry *dst = tp->dst;
struct net *net;
unsigned char *auth = NULL; /* pointer to auth in skb data */
__u32 cksum_buf_len = sizeof(struct sctphdr);
@ -541,7 +542,9 @@ int sctp_packet_transmit(struct sctp_packet *packet)
* Note: Adler-32 is no longer applicable, as has been replaced
* by CRC32-C as described in <draft-ietf-tsvwg-sctpcsum-02.txt>.
*/
if (!sctp_checksum_disable) {
net = dev_net(dst->dev);
if (!net->sctp.checksum_disable) {
if (!(dst->dev->features & NETIF_F_SCTP_CSUM)) {
__u32 crc32 = sctp_start_cksum((__u8 *)sh, cksum_buf_len);

View file

@ -1193,6 +1193,9 @@ static int __net_init sctp_net_init(struct net *net)
/* Whether Cookie Preservative is enabled(1) or not(0) */
net->sctp.cookie_preserve_enable = 1;
/* Whether SCTP checksumming is disabled(1) or not(0) */
net->sctp.checksum_disable = 0;
/* Default sctp sockets to use md5 as their hmac alg */
#if defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5)
net->sctp.sctp_hmac_alg = "md5";
@ -1549,6 +1552,4 @@ MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
MODULE_AUTHOR("Linux Kernel SCTP developers <linux-sctp@vger.kernel.org>");
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
module_param_named(no_checksums, sctp_checksum_disable, bool, 0644);
MODULE_PARM_DESC(no_checksums, "Disable checksums computing and verification");
MODULE_LICENSE("GPL");

View file

@ -296,7 +296,15 @@ static struct ctl_table sctp_net_table[] = {
.extra1 = &max_autoclose_min,
.extra2 = &max_autoclose_max,
},
{
.procname = "checksum_disable",
.data = &init_net.sctp.checksum_disable,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &zero,
.extra2 = &one,
},
{ /* sentinel */ }
};