[lkml]   [2007]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] Add source address to sunrpc svc errors
This patch adds the address of the client that caused an
error in sunrpc/svc.c so that you get errors that look like:

svc:, port=709 :unknown version (3 for prog 100003, nfsd)

I've seen machines which get bunches of unknown version or similar
errors from time to time, and while the recent patch to add
the service helps to find which service has the wrong version it doesn't
help find the potentially bad client.

The patch is against a checkout of Linus's git tree made
on 2007-08-24.

One observation is that the svc_print_addr function
prints to a buffer which in this case makes life a little more complex;
it just feels as if there must be lots of places that print a
connection address - is there a better function to use anywhere?

I think actually there are a few places with semi duplicated code; e.g.
one_sock_name switches on the address family but only currently
has IPV4; I wonder how many other places are similar.


Signed-off-by: Dave Gilbert <>

-----Open up your eyes, open up your mind, open up your code -------
/ Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \
\ gro.gilbert @ | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
\ _________________________|_____ |_______/

--- linux-2.6/net/sunrpc/svc.c.predag 2007-08-25 00:50:06.000000000 +0100
+++ linux-2.6/net/sunrpc/svc.c 2007-08-25 01:34:56.000000000 +0100
@@ -777,6 +777,28 @@ svc_register(struct svc_serv *serv, int

+ * Printk the given error with the address of the client that caused it.
+ */
+static int
+svc_printkerr(struct svc_rqst *rqstp, const char* fmt,...)
+ va_list args;
+ int r;
+ if (!net_ratelimit())
+ return 0;
+ printk("svc: %s :", svc_print_addr(rqstp, buf, sizeof(buf)));
+ va_start(args, fmt);
+ r = vprintk(fmt, args);
+ va_end(args);
+ return r;
* Process the RPC request.
@@ -963,14 +985,13 @@ svc_process(struct svc_rqst *rqstp)
return 0;

- if (net_ratelimit())
- printk("svc: short len %Zd, dropping request\n", argv->iov_len);
+ svc_printkerr(rqstp, "short len %Zd, dropping request\n",
+ argv->iov_len);

goto dropit; /* drop request */

- if (net_ratelimit())
- printk("svc: bad direction %d, dropping request\n", dir);
+ svc_printkerr(rqstp, "bad direction %d, dropping request\n", dir);

goto dropit; /* drop request */
@@ -1000,8 +1021,7 @@ err_bad_prog:
goto sendit;

- if (net_ratelimit())
- printk("svc: unknown version (%d for prog %d, %s)\n",
+ svc_printkerr(rqstp, "unknown version (%d for prog %d, %s)\n",
vers, prog, progp->pg_name);

@@ -1011,16 +1031,14 @@ err_bad_vers:
goto sendit;

- if (net_ratelimit())
- printk("svc: unknown procedure (%d)\n", proc);
+ svc_printkerr(rqstp, "unknown procedure (%d)\n", proc);

svc_putnl(resv, RPC_PROC_UNAVAIL);
goto sendit;

- if (net_ratelimit())
- printk("svc: failed to decode args\n");
+ svc_printkerr(rqstp, "svc: failed to decode args\n");

rpc_stat = rpc_garbage_args;
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at
 \ /
  Last update: 2007-08-25 03:29    [W:0.065 / U:6.084 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site