Use DEFINE_SHOW_ATTRIBUTE helper macro to simplify the code.
nfsd_net is converted from seq_file->file instead of seq_file->private in
nfsd_reply_cache_stats_show().
Signed-off-by: ChenXiaoSong <chenxiaosong2@xxxxxxxxxx>
---
fs/nfsd/cache.h | 2 +-
fs/nfsd/nfscache.c | 13 +++----------
fs/nfsd/nfsctl.c | 9 ++-------
3 files changed, 6 insertions(+), 18 deletions(-)
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
index 65c331f75e9c..f21259ead64b 100644
--- a/fs/nfsd/cache.h
+++ b/fs/nfsd/cache.h
@@ -84,6 +84,6 @@ int nfsd_reply_cache_init(struct nfsd_net *);
void nfsd_reply_cache_shutdown(struct nfsd_net *);
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 *);
+int nfsd_reply_cache_stats_show(struct seq_file *m, void *v);
#endif /* NFSCACHE_H */
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 9b31e1103e7b..3e64a3d50a1c 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -604,9 +604,10 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
* 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)
+int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
{
- struct nfsd_net *nn = m->private;
+ struct nfsd_net *nn = net_generic(file_inode(m->file)->i_sb->s_fs_info,
+ nfsd_net_id);
seq_printf(m, "max entries: %u\n", nn->max_drc_entries);
seq_printf(m, "num entries: %u\n",
@@ -626,11 +627,3 @@ static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "cachesize at longest: %u\n", nn->longest_chain_cachesize);
return 0;
}
-
-int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
-{
- struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
- nfsd_net_id);
-
- return single_open(file, nfsd_reply_cache_stats_show, nn);
-}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 51360d0bf424..faaedefec94c 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -204,12 +204,7 @@ static const struct file_operations pool_stats_operations = {
.release = nfsd_pool_stats_release,
};
-static const struct file_operations reply_cache_stats_operations = {
- .open = nfsd_reply_cache_stats_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats);
static const struct file_operations filecache_ops = {
.open = nfsd_file_cache_stats_open,
@@ -1354,7 +1349,7 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
[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_Reply_Cache_Stats] = {"reply_cache_stats", &nfsd_reply_cache_stats_fops, 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},
--
2.31.1
