Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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>
authored by Tom Tucker and committed by J. Bruce Fields dc9a16e4 260c1d12
+1
include/linux/sunrpc/svc_xprt.h
+1
include/linux/sunrpc/svc_xprt.h
+28
net/sunrpc/svc_xprt.c
+28
net/sunrpc/svc_xprt.c
···
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}
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EXPORT_SYMBOL_GPL(svc_unreg_xprt_class);
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+
/*
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+
* Format the transport list for printing
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+
*/
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+
int svc_print_xprts(char *buf, int maxlen)
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+
{
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+
struct list_head *le;
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+
char tmpstr[80];
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+
int len = 0;
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+
buf[0] = '\0';
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+
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+
spin_lock(&svc_xprt_class_lock);
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+
list_for_each(le, &svc_xprt_class_list) {
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+
int slen;
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+
struct svc_xprt_class *xcl =
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+
list_entry(le, struct svc_xprt_class, xcl_list);
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+
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+
sprintf(tmpstr, "%s %d\n", xcl->xcl_name, xcl->xcl_max_payload);
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+
slen = strlen(tmpstr);
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+
if (len + slen > maxlen)
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+
break;
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+
len += slen;
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+
strcat(buf, tmpstr);
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+
}
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+
spin_unlock(&svc_xprt_class_lock);
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+
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return len;
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+
}
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+
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static void svc_xprt_free(struct kref *kref)
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{
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struct svc_xprt *xprt =
+31
net/sunrpc/sysctl.c
+31
net/sunrpc/sysctl.c
···
18
#include <linux/sunrpc/types.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/stats.h>
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/*
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* Declare the debug flags here
···
54
unregister_sysctl_table(sunrpc_table_header);
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sunrpc_table_header = NULL;
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}
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}
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static int
···
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
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},
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{ .ctl_name = 0 }
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};
···
18
#include <linux/sunrpc/types.h>
19
#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/stats.h>
21
+
#include <linux/sunrpc/svc_xprt.h>
22
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/*
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* Declare the debug flags here
···
53
unregister_sysctl_table(sunrpc_table_header);
54
sunrpc_table_header = NULL;
55
}
56
+
}
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+
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+
static int proc_do_xprt(ctl_table *table, int write, struct file *file,
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+
void __user *buffer, size_t *lenp, loff_t *ppos)
60
+
{
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+
char tmpbuf[256];
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+
int len;
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+
if ((*ppos && !write) || !*lenp) {
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+
*lenp = 0;
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+
return 0;
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+
}
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+
if (write)
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+
return -EINVAL;
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+
else {
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+
len = svc_print_xprts(tmpbuf, sizeof(tmpbuf));
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+
if (!access_ok(VERIFY_WRITE, buffer, len))
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+
return -EFAULT;
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+
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+
if (__copy_to_user(buffer, tmpbuf, len))
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+
return -EFAULT;
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+
}
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+
*lenp -= len;
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+
*ppos += len;
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+
return 0;
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}
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static int
···
146
.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
149
+
},
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+
{
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+
.procname = "transports",
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+
.maxlen = 256,
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+
.mode = 0444,
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+
.proc_handler = &proc_do_xprt,
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},
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{ .ctl_name = 0 }
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};