Commit 9fe5ea76 authored by Chuck Lever's avatar Chuck Lever
Browse files

NFSD: Add /sys/kernel/debug/nfsd 



Create a small sandbox under /sys/kernel/debug for experimental NFS
server feature settings. There is no API/ABI compatibility guarantee
for these settings.

The only documentation for such settings, if any documentation exists,
is in the kernel source code.

Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent f7fb730c

fs/nfsd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ nfsd-$(CONFIG_NFSD_BLOCKLAYOUT) += blocklayout.o blocklayoutxdr.o 
nfsd-$(CONFIG_NFSD_SCSILAYOUT) += blocklayout.o blocklayoutxdr.o

nfsd-$(CONFIG_NFSD_FLEXFILELAYOUT) += flexfilelayout.o flexfilelayoutxdr.o

nfsd-$(CONFIG_NFS_LOCALIO) += localio.o

nfsd-$(CONFIG_DEBUG_FS) += debugfs.o





.PHONY: xdrgen

fs/nfsd/debugfs.c

0 → 100644
+18 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include <linux/debugfs.h>



#include "nfsd.h"



static struct dentry *nfsd_top_dir __read_mostly;



void nfsd_debugfs_exit(void)

{

	debugfs_remove_recursive(nfsd_top_dir);

	nfsd_top_dir = NULL;

}



void nfsd_debugfs_init(void)

{

	nfsd_top_dir = debugfs_create_dir("nfsd", NULL);

}

fs/nfsd/nfsctl.c

+4 −0
Original line number Diff line number Diff line
@@ -2281,6 +2281,8 @@ static int __init init_nfsd(void) 
{

	int retval;



	nfsd_debugfs_init();



	retval = nfsd4_init_slabs();

	if (retval)

		return retval;
@@ -2329,6 +2331,7 @@ static int __init init_nfsd(void) 
	nfsd4_exit_pnfs();

out_free_slabs:

	nfsd4_free_slabs();

	nfsd_debugfs_exit();

	return retval;

}
@@ -2345,6 +2348,7 @@ static void __exit exit_nfsd(void) 
	nfsd_lockd_shutdown();

	nfsd4_free_slabs();

	nfsd4_exit_pnfs();

	nfsd_debugfs_exit();

}



MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");

fs/nfsd/nfsd.h

+8 −0
Original line number Diff line number Diff line
@@ -156,6 +156,14 @@ void nfsd_reset_versions(struct nfsd_net *nn); 
int nfsd_create_serv(struct net *net);

void nfsd_destroy_serv(struct net *net);



#ifdef CONFIG_DEBUG_FS

void nfsd_debugfs_init(void);

void nfsd_debugfs_exit(void);

#else

static inline void nfsd_debugfs_init(void) {}

static inline void nfsd_debugfs_exit(void) {}

#endif



extern int nfsd_max_blksize;



static inline int nfsd_v4client(struct svc_rqst *rq)