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Commit a2f999a3 authored by Jeff Layton's avatar Jeff Layton Committed by J. Bruce Fields
Browse files

nfsd: add new reply_cache_stats file in nfsdfs 



For presenting statistics relating to duplicate reply cache.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 6c6910cd

fs/nfsd/cache.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

fs/nfsd/nfscache.c

+25 −0
Original line number Diff line number Diff line
@@ -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);

}

fs/nfsd/nfsctl.c

+9 −0
Original line number Diff line number Diff line
@@ -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},