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Commit dc9a16e4 authored by Tom Tucker's avatar Tom Tucker Committed by J. Bruce Fields
Browse files

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



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

Signed-off-by: default avatarTom Tucker <tom@opengridcomputing.com>
Acked-by: default avatarNeil Brown <neilb@suse.de>
Reviewed-by: default avatarChuck Lever <chuck.lever@oracle.com>
Reviewed-by: default avatarGreg Banks <gnb@sgi.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent 260c1d12

include/linux/sunrpc/svc_xprt.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

{

net/sunrpc/svc_xprt.c

+28 −0
Original line number Diff line number Diff line
@@ -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 =

net/sunrpc/sysctl.c

+31 −0
Original line number Diff line number Diff line
@@ -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 }

};