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| author | Jeff Layton <jlayton@redhat.com> | 2013-03-27 10:15:38 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-04-03 11:47:24 -0400 |
| commit | a2f999a37ebb77e857d3a178bd6f52d1163cd980 (patch) | |
| tree | 2319536cbbc8edba7af77de9f1358edea3a289cc | |
| parent | 6c6910cd4d0cdb905fbba8c751afd143696930f2 (diff) | |
| download | linux-a2f999a37ebb77e857d3a178bd6f52d1163cd980.tar.gz linux-a2f999a37ebb77e857d3a178bd6f52d1163cd980.tar.bz2 linux-a2f999a37ebb77e857d3a178bd6f52d1163cd980.zip | |
nfsd: add new reply_cache_stats file in nfsdfs
For presenting statistics relating to duplicate reply cache.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/cache.h | 1 | ||||
| -rw-r--r-- | fs/nfsd/nfscache.c | 25 | ||||
| -rw-r--r-- | fs/nfsd/nfsctl.c | 9 |
3 files changed, 35 insertions, 0 deletions
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h index 87fd1410b737..d5c5b3e00266 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 1f45b3353bb1..fd81ca79a002 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -556,3 +556,28 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data) vec->iov_len += data->iov_len; return 1; } + +/* + * Note that fields may be added, removed or reordered in the future. Programs + * scraping this file for info should test the labels to ensure they're + * getting the correct field. + */ +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, "hash buckets: %u\n", HASHSIZE); + seq_printf(m, "mem usage: %u\n", drc_mem_usage); + 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, "payload misses: %u\n", payload_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 f33455b4d957..a830f33df3ef 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, @@ -212,6 +213,13 @@ 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 @@ -1047,6 +1055,7 @@ 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}, |