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SUNRPC/NFS: Add Kbuild dependencies for NFS_DEBUG/RPC_DEBUG

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This allows us to turn on/off the dprintk() debugging interfaces for
those distributions that don't ship the 'rpcdebug' utility.
It also allows us to add Kbuild dependencies. Specifically, we already
know that dprintk() in general relies on CONFIG_SYSCTL. Now it turns out
that the NFS dprintks depend on CONFIG_CRC32 after we added support
for the filehandle hash.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2012-03-18 14:07:42 -04:00
parent 3b3be88d67
commit e27d359e9b
7 changed files with 31 additions and 13 deletions
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6
fs/nfs/Kconfig
View file

@ -144,3 +144,9 @@ config NFS_USE_KERNEL_DNS
depends on NFS_V4 && !NFS_USE_LEGACY_DNS
select DNS_RESOLVER
default y
config NFS_DEBUG
bool
depends on NFS_FS && SUNRPC_DEBUG
select CRC32
default y

2
fs/nfs/inode.c
View file

@ -1047,7 +1047,7 @@ struct nfs_fh *nfs_alloc_fhandle(void)
return fh;
}
#ifdef RPC_DEBUG
#ifdef NFS_DEBUG
/*
* _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
* in the same way that wireshark does

2
fs/nfs/mount_clnt.c
View file

@ -16,7 +16,7 @@
#include <linux/nfs_fs.h>
#include "internal.h"
#ifdef RPC_DEBUG
#ifdef NFS_DEBUG
# define NFSDBG_FACILITY NFSDBG_MOUNT
#endif

2
fs/nfs/nfsroot.c
View file

@ -104,7 +104,7 @@ static char nfs_export_path[NFS_MAXPATHLEN + 1] __initdata = "";
/* server:export path string passed to super.c */
static char nfs_root_device[NFS_MAXPATHLEN + 1] __initdata = "";
#ifdef RPC_DEBUG
#ifdef NFS_DEBUG
/*
* When the "nfsrootdebug" kernel command line option is specified,
* enable debugging messages for NFSROOT.

17
include/linux/nfs_fs.h
View file

@ -38,6 +38,13 @@
#ifdef __KERNEL__
/*
* Enable dprintk() debugging support for nfs client.
*/
#ifdef CONFIG_NFS_DEBUG
# define NFS_DEBUG
#endif
#include <linux/in.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
@ -391,7 +398,7 @@ static inline void nfs_free_fhandle(const struct nfs_fh *fh)
kfree(fh);
}
#ifdef RPC_DEBUG
#ifdef NFS_DEBUG
extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
{
@ -650,14 +657,6 @@ nfs_fileid_to_ino_t(u64 fileid)
#ifdef __KERNEL__
/*
* Enable debugging support for nfs client.
* Requires RPC_DEBUG.
*/
#ifdef RPC_DEBUG
# define NFS_DEBUG
#endif
# undef ifdebug
# ifdef NFS_DEBUG
# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))

2
include/linux/sunrpc/debug.h
View file

@ -31,7 +31,7 @@
/*
* Enable RPC debugging/profiling.
*/
#ifdef CONFIG_SYSCTL
#ifdef CONFIG_SUNRPC_DEBUG
#define RPC_DEBUG
#endif
#ifdef CONFIG_TRACEPOINTS

13
net/sunrpc/Kconfig
View file

@ -39,3 +39,16 @@ config RPCSEC_GSS_KRB5
Kerberos support should be installed.
If unsure, say Y.
config SUNRPC_DEBUG
bool "RPC: Enable dprintk debugging"
depends on SUNRPC && SYSCTL
help
This option enables a sysctl-based debugging interface
that is be used by the 'rpcdebug' utility to turn on or off
logging of different aspects of the kernel RPC activity.
Disabling this option will make your kernel slightly smaller,
but makes troubleshooting NFS issues significantly harder.
If unsure, say Y.