* [PATCH] knfsd: Ratelimit some nfsd messages that are triggered by external events.
[not found] <20070129110005.30734.patches@notabene>
@ 2007-01-29 0:01 ` NeilBrown
0 siblings, 0 replies; only message in thread
From: NeilBrown @ 2007-01-29 0:01 UTC (permalink / raw)
To: Andrew Morton; +Cc: nfs, linux-kernel
Another nfsd patch suitable for 2.6.20, though it could wait for .21
if we feel it is time to be more cautious.
Thanks,
NeilBrown
### Comments for Changeset
Also remove {NFSD,RPC}_PARANOIA as having the defines doesn't
really add anything.
The printks covered by RPC_PARANOIA were tirggered by badly
formatted packets and so should be ratelimited.
Signed-off-by: Neil Brown <neilb@suse.de>
### Diffstat output
./fs/nfsd/export.c | 1 -
./fs/nfsd/nfsfh.c | 14 ++++++--------
./fs/nfsd/vfs.c | 1 -
./net/sunrpc/svc.c | 33 ++++++++++++++++-----------------
./net/sunrpc/svcsock.c | 12 ++++++++----
5 files changed, 30 insertions(+), 31 deletions(-)
diff .prev/fs/nfsd/export.c ./fs/nfsd/export.c
--- .prev/fs/nfsd/export.c 2007-01-22 09:08:21.000000000 +1100
+++ ./fs/nfsd/export.c 2007-01-29 09:54:42.000000000 +1100
@@ -34,7 +34,6 @@
#include <linux/lockd/bind.h>
#define NFSDDBG_FACILITY NFSDDBG_EXPORT
-#define NFSD_PARANOIA 1
typedef struct auth_domain svc_client;
typedef struct svc_export svc_export;
diff .prev/fs/nfsd/nfsfh.c ./fs/nfsd/nfsfh.c
--- .prev/fs/nfsd/nfsfh.c 2007-01-22 09:08:23.000000000 +1100
+++ ./fs/nfsd/nfsfh.c 2007-01-29 10:56:39.000000000 +1100
@@ -24,8 +24,6 @@
#include <linux/nfsd/nfsd.h>
#define NFSDDBG_FACILITY NFSDDBG_FH
-#define NFSD_PARANOIA 1
-/* #define NFSD_DEBUG_VERBOSE 1 */
static int nfsd_nr_verified;
@@ -230,13 +228,12 @@ fh_verify(struct svc_rqst *rqstp, struct
error = nfserrno(PTR_ERR(dentry));
goto out;
}
-#ifdef NFSD_PARANOIA
+
if (S_ISDIR(dentry->d_inode->i_mode) &&
(dentry->d_flags & DCACHE_DISCONNECTED)) {
printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
}
-#endif
fhp->fh_dentry = dentry;
fhp->fh_export = exp;
@@ -267,12 +264,13 @@ fh_verify(struct svc_rqst *rqstp, struct
/* Finally, check access permissions. */
error = nfsd_permission(exp, dentry, access);
-#ifdef NFSD_PARANOIA_EXTREME
if (error) {
- printk("fh_verify: %s/%s permission failure, acc=%x, error=%d\n",
- dentry->d_parent->d_name.name, dentry->d_name.name, access, (error >> 24));
+ dprintk("fh_verify: %s/%s permission failure, "
+ "acc=%x, error=%d\n",
+ dentry->d_parent->d_name.name,
+ dentry->d_name.name,
+ access, (error >> 24));
}
-#endif
out:
if (exp && !IS_ERR(exp))
exp_put(exp);
diff .prev/fs/nfsd/vfs.c ./fs/nfsd/vfs.c
--- .prev/fs/nfsd/vfs.c 2007-01-24 18:32:10.000000000 +1100
+++ ./fs/nfsd/vfs.c 2007-01-29 09:56:13.000000000 +1100
@@ -59,7 +59,6 @@
#include <asm/uaccess.h>
#define NFSDDBG_FACILITY NFSDDBG_FILEOP
-#define NFSD_PARANOIA
/* We must ignore files (but only files) which might have mandatory
diff .prev/net/sunrpc/svc.c ./net/sunrpc/svc.c
--- .prev/net/sunrpc/svc.c 2007-01-23 11:14:49.000000000 +1100
+++ ./net/sunrpc/svc.c 2007-01-29 10:06:49.000000000 +1100
@@ -26,7 +26,6 @@
#include <linux/sunrpc/clnt.h>
#define RPCDBG_FACILITY RPCDBG_SVCDSP
-#define RPC_PARANOIA 1
/*
* Mode for mapping cpus to pools.
@@ -872,15 +871,15 @@ svc_process(struct svc_rqst *rqstp)
return 0;
err_short_len:
-#ifdef RPC_PARANOIA
- printk("svc: short len %Zd, dropping request\n", argv->iov_len);
-#endif
+ if (net_ratelimit())
+ printk("svc: short len %Zd, dropping request\n", argv->iov_len);
+
goto dropit; /* drop request */
err_bad_dir:
-#ifdef RPC_PARANOIA
- printk("svc: bad direction %d, dropping request\n", dir);
-#endif
+ if (net_ratelimit())
+ printk("svc: bad direction %d, dropping request\n", dir);
+
serv->sv_stats->rpcbadfmt++;
goto dropit; /* drop request */
@@ -909,10 +908,10 @@ err_bad_prog:
goto sendit;
err_bad_vers:
-#ifdef RPC_PARANOIA
- printk("svc: unknown version (%d for prog %d, %s)\n",
- vers, prog, progp->pg_name);
-#endif
+ if (net_ratelimit())
+ printk("svc: unknown version (%d for prog %d, %s)\n",
+ vers, prog, progp->pg_name);
+
serv->sv_stats->rpcbadfmt++;
svc_putnl(resv, RPC_PROG_MISMATCH);
svc_putnl(resv, progp->pg_lovers);
@@ -920,17 +919,17 @@ err_bad_vers:
goto sendit;
err_bad_proc:
-#ifdef RPC_PARANOIA
- printk("svc: unknown procedure (%d)\n", proc);
-#endif
+ if (net_ratelimit())
+ printk("svc: unknown procedure (%d)\n", proc);
+
serv->sv_stats->rpcbadfmt++;
svc_putnl(resv, RPC_PROC_UNAVAIL);
goto sendit;
err_garbage:
-#ifdef RPC_PARANOIA
- printk("svc: failed to decode args\n");
-#endif
+ if (net_ratelimit())
+ printk("svc: failed to decode args\n");
+
rpc_stat = rpc_garbage_args;
err_bad:
serv->sv_stats->rpcbadfmt++;
diff .prev/net/sunrpc/svcsock.c ./net/sunrpc/svcsock.c
--- .prev/net/sunrpc/svcsock.c 2007-01-23 11:14:54.000000000 +1100
+++ ./net/sunrpc/svcsock.c 2007-01-29 10:56:08.000000000 +1100
@@ -1090,15 +1090,19 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
* bit set in the fragment length header.
* But apparently no known nfs clients send fragmented
* records. */
- printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (non-terminal)\n",
- (unsigned long) svsk->sk_reclen);
+ if (net_ratelimit())
+ printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
+ " (non-terminal)\n",
+ (unsigned long) svsk->sk_reclen);
goto err_delete;
}
svsk->sk_reclen &= 0x7fffffff;
dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen);
if (svsk->sk_reclen > serv->sv_max_mesg) {
- printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx (large)\n",
- (unsigned long) svsk->sk_reclen);
+ if (net_ratelimit())
+ printk(KERN_NOTICE "RPC: bad TCP reclen 0x%08lx"
+ " (large)\n",
+ (unsigned long) svsk->sk_reclen);
goto err_delete;
}
}
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