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author | Jeff Layton <jlayton@redhat.com> | 2013-03-27 14:15:38 (GMT) |
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committer | J. Bruce Fields <bfields@redhat.com> | 2013-04-03 15:47:24 (GMT) |
commit | a2f999a37ebb77e857d3a178bd6f52d1163cd980 (patch) | |
tree | 2319536cbbc8edba7af77de9f1358edea3a289cc /fs/nfsd/nfscache.c | |
parent | 6c6910cd4d0cdb905fbba8c751afd143696930f2 (diff) | |
download | linux-fsl-qoriq-a2f999a37ebb77e857d3a178bd6f52d1163cd980.tar.xz |
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>
Diffstat (limited to 'fs/nfsd/nfscache.c')
-rw-r--r-- | fs/nfsd/nfscache.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 1f45b33..fd81ca7 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); +} |