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svc: Add /proc/sys/sunrpc/transport files 

Add a file that when read lists the set of registered svc
transports.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Tom Tucker 2007-12-30 21:08:31 -06:00 committed by J. Bruce Fields
parent 260c1d1298
commit dc9a16e49d
3 changed files with 60 additions and 0 deletions
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1
include/linux/sunrpc/svc_xprt.h
View File

@ -79,6 +79,7 @@ void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
void svc_close_xprt(struct svc_xprt *xprt);
void svc_delete_xprt(struct svc_xprt *xprt);
int svc_port_is_privileged(struct sockaddr *sin);
int svc_print_xprts(char *buf, int maxlen);
static inline void svc_xprt_get(struct svc_xprt *xprt)
{

28
net/sunrpc/svc_xprt.c
View File

@ -112,6 +112,34 @@ void svc_unreg_xprt_class(struct svc_xprt_class *xcl)
}
EXPORT_SYMBOL_GPL(svc_unreg_xprt_class);
/*
* Format the transport list for printing
*/
int svc_print_xprts(char *buf, int maxlen)
{
struct list_head *le;
char tmpstr[80];
int len = 0;
buf[0] = '\0';
spin_lock(&svc_xprt_class_lock);
list_for_each(le, &svc_xprt_class_list) {
int slen;
struct svc_xprt_class *xcl =
list_entry(le, struct svc_xprt_class, xcl_list);
sprintf(tmpstr, "%s %d\n", xcl->xcl_name, xcl->xcl_max_payload);
slen = strlen(tmpstr);
if (len + slen > maxlen)
break;
len += slen;
strcat(buf, tmpstr);
}
spin_unlock(&svc_xprt_class_lock);
return len;
}
static void svc_xprt_free(struct kref *kref)
{
struct svc_xprt *xprt =

31
net/sunrpc/sysctl.c
View File

@ -18,6 +18,7 @@
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svc_xprt.h>
/*
* Declare the debug flags here
@ -55,6 +56,30 @@ rpc_unregister_sysctl(void)
}
}
static int proc_do_xprt(ctl_table *table, int write, struct file *file,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
char tmpbuf[256];
int len;
if ((*ppos && !write) || !*lenp) {
*lenp = 0;
return 0;
}
if (write)
return -EINVAL;
else {
len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
if (!access_ok(VERIFY_WRITE, buffer, len))
return -EFAULT;
if (__copy_to_user(buffer, tmpbuf, len))
return -EFAULT;
}
*lenp -= len;
*ppos += len;
return 0;
}
static int
proc_dodebug(ctl_table *table, int write, struct file *file,
void __user *buffer, size_t *lenp, loff_t *ppos)
@ -147,6 +172,12 @@ static ctl_table debug_table[] = {
.mode = 0644,
.proc_handler = &proc_dodebug
},
{
.procname = "transports",
.maxlen = 256,
.mode = 0444,
.proc_handler = &proc_do_xprt,
},
{ .ctl_name = 0 }
};