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authorGreg Banks <gnb@sgi.com>2009-01-13 21:26:36 +1100
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-03-18 17:38:42 -0400
commit03cf6c9f49a8fea953d38648d016e3f46e814991 (patch)
treec7e639bd9fb775af1919d2442d0bf2306dfbfca7 /fs/nfsd
parent59a252ff8c0f2fa32c896f69d56ae33e641ce7ad (diff)
knfsd: add file to export stats about nfsd pools
Add /proc/fs/nfsd/pool_stats to export to userspace various statistics about the operation of rpc server thread pools. This patch is based on a forward-ported version of knfsd-add-pool-thread-stats which has been shipping in the SGI "Enhanced NFS" product since 2006 and which was previously posted: http://article.gmane.org/gmane.linux.nfs/10375 It has also been updated thus: * moved EXPORT_SYMBOL() to near the function it exports * made the new struct struct seq_operations const * used SEQ_START_TOKEN instead of ((void *)1) * merged fix from SGI PV 990526 "sunrpc: use dprintk instead of printk in svc_pool_stats_*()" by Harshula Jayasuriya. * merged fix from SGI PV 964001 "Crash reading pool_stats before nfsds are started". Signed-off-by: Greg Banks <gnb@sgi.com> Signed-off-by: Harshula Jayasuriya <harshula@sgi.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfsctl.c12
-rw-r--r--fs/nfsd/nfssvc.c7
2 files changed, 19 insertions, 0 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 3d93b2064ce..4adebb6312c 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -60,6 +60,7 @@ enum {
NFSD_FO_UnlockFS,
NFSD_Threads,
NFSD_Pool_Threads,
+ NFSD_Pool_Stats,
NFSD_Versions,
NFSD_Ports,
NFSD_MaxBlkSize,
@@ -172,6 +173,16 @@ static const struct file_operations exports_operations = {
.owner = THIS_MODULE,
};
+extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
+
+static struct file_operations pool_stats_operations = {
+ .open = nfsd_pool_stats_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+ .owner = THIS_MODULE,
+};
+
/*----------------------------------------------------------------------------*/
/*
* payload - write methods
@@ -1246,6 +1257,7 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
[NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
[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_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},
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index c3eb0759fd5..ef0a3686639 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -546,3 +546,10 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1);
return 1;
}
+
+int nfsd_pool_stats_open(struct inode *inode, struct file *file)
+{
+ if (nfsd_serv == NULL)
+ return -ENODEV;
+ return svc_pool_stats_open(nfsd_serv, file);
+}