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NFSD: Hook up the filecache stat file

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[ Upstream commit 2e6c6e4c4375bfd3defa5b1ff3604d9f33d1c936 ]

There has always been the capability of exporting filecache metrics
via /proc, but it was never hooked up. Let's surface these metrics
to enable better observability of the filecache.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chuck Lever 2022-07-08 14:24:58 -04:00 • committed by Ksawlii
parent 08cf06f7ea
commit 2310e47e13
1 changed files with 10 additions and 0 deletions
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10
fs/nfsd/nfsctl.c
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@ -25,6 +25,7 @@
#include "state.h"
#include "netns.h"
#include "pnfs.h"
#include "filecache.h"
/*
* We have a single directory with several nodes in it.
@ -45,6 +46,7 @@ enum {
NFSD_Ports,
NFSD_MaxBlkSize,
NFSD_MaxConnections,
NFSD_Filecache,
NFSD_SupportedEnctypes,
/*
* The below MUST come last. Otherwise we leave a hole in nfsd_files[]
@ -229,6 +231,13 @@ static const struct file_operations reply_cache_stats_operations = {
.release = single_release,
};
static const struct file_operations filecache_ops = {
.open = nfsd_file_cache_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/*----------------------------------------------------------------------------*/
/*
* payload - write methods
@ -1370,6 +1379,7 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_Filecache] = {"filecache", &filecache_ops, S_IRUGO},
#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
[NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */