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[PATCH] knfsd: ratelimit some nfsd messages that are triggered by external events

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Also remove {NFSD,RPC}_PARANOIA as having the defines doesn't really add
anything.

The printks covered by RPC_PARANOIA were triggered by badly formatted
packets and so should be ratelimited.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
NeilBrown 2007-01-29 13:19:52 -08:00 committed by Linus Torvalds
parent d019bcf0eb
commit 34e9a63b4f
5 changed files with 30 additions and 31 deletions
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1
fs/nfsd/export.c
View File

@ -35,7 +35,6 @@
#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;

14
fs/nfsd/nfsfh.c
View File

@ -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 svc_fh *fhp, int type, int access)
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 svc_fh *fhp, int type, int access)
/* 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);

1
fs/nfsd/vfs.c
View File

@ -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

33
net/sunrpc/svc.c
View File

@ -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++;

12
net/sunrpc/svcsock.c
View File

@ -1062,15 +1062,19 @@ 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;
}
}