diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2025-03-08 15:14:37 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2025-05-11 19:48:23 -0400 |
| commit | 9fe5ea760e64f04412dbed51645a0dac7220d40a (patch) | |
| tree | 7e5f7c7cfaa546761f88636cebf611bfebcbb12f | |
| parent | f7fb730cac9aafda8b9813b55d04e28a9664d17c (diff) | |
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: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| -rw-r--r-- | fs/nfsd/Makefile | 1 | ||||
| -rw-r--r-- | fs/nfsd/debugfs.c | 18 | ||||
| -rw-r--r-- | fs/nfsd/nfsctl.c | 4 | ||||
| -rw-r--r-- | fs/nfsd/nfsd.h | 8 |
4 files changed, 31 insertions, 0 deletions
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile index 2f687619f65b..55744bb786c9 100644 --- a/fs/nfsd/Makefile +++ b/fs/nfsd/Makefile @@ -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 diff --git a/fs/nfsd/debugfs.c b/fs/nfsd/debugfs.c new file mode 100644 index 000000000000..e913268d9c2d --- /dev/null +++ b/fs/nfsd/debugfs.c @@ -0,0 +1,18 @@ +// 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); +} diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index f9763ced743d..3f3e9f6c4250 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -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 @@ out_free_pnfs: 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>"); diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index e2997f0ffbc5..8a53ddab5df0 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -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) |