Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-gh0-f169.google.com ([209.85.160.169]:61424 "EHLO mail-gh0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934983Ab3BNVpY (ORCPT ); Thu, 14 Feb 2013 16:45:24 -0500 Received: by mail-gh0-f169.google.com with SMTP id r18so4250ghr.28 for ; Thu, 14 Feb 2013 13:45:23 -0800 (PST) From: Jeff Layton To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH 3/3] nfsd: add new reply_cache_stats file in nfsdfs Date: Thu, 14 Feb 2013 16:45:15 -0500 Message-Id: <1360878315-21578-4-git-send-email-jlayton@redhat.com> In-Reply-To: <1360878315-21578-1-git-send-email-jlayton@redhat.com> References: <1360878315-21578-1-git-send-email-jlayton@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: For presenting statistics relating to duplicate reply cache. Signed-off-by: Jeff Layton --- fs/nfsd/cache.h | 1 + fs/nfsd/nfscache.c | 18 ++++++++++++++++++ fs/nfsd/nfsctl.c | 9 +++++++++ 3 files changed, 28 insertions(+) diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h index 87fd141..d5c5b3e 100644 --- a/fs/nfsd/cache.h +++ b/fs/nfsd/cache.h @@ -82,6 +82,7 @@ int nfsd_reply_cache_init(void); void nfsd_reply_cache_shutdown(void); int nfsd_cache_lookup(struct svc_rqst *); void nfsd_cache_update(struct svc_rqst *, int, __be32 *); +int nfsd_reply_cache_stats_open(struct inode *, struct file *); #ifdef CONFIG_NFSD_V4 void nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp); diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index bccf74f..517b92d 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -540,3 +540,21 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data) vec->iov_len += data->iov_len; return 1; } + +static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v) +{ + spin_lock(&cache_lock); + seq_printf(m, "max entries: %u\n", max_drc_entries); + seq_printf(m, "num entries: %u\n", num_drc_entries); + seq_printf(m, "cache hits: %u\n", nfsdstats.rchits); + seq_printf(m, "cache misses: %u\n", nfsdstats.rcmisses); + seq_printf(m, "not cached: %u\n", nfsdstats.rcnocache); + seq_printf(m, "checksum misses: %u\n", csum_misses); + spin_unlock(&cache_lock); + return 0; +} + +int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, nfsd_reply_cache_stats_show, NULL); +} diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 29c3f0d..5dea5af 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -35,6 +35,7 @@ enum { NFSD_Threads, NFSD_Pool_Threads, NFSD_Pool_Stats, + NFSD_Reply_Cache_Stats, NFSD_Versions, NFSD_Ports, NFSD_MaxBlkSize, @@ -194,6 +195,13 @@ static const struct file_operations pool_stats_operations = { .owner = THIS_MODULE, }; +static struct file_operations reply_cache_stats_operations = { + .open = nfsd_reply_cache_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + /*----------------------------------------------------------------------------*/ /* * payload - write methods @@ -1024,6 +1032,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, + [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, -- 1.7.11.7