linux-kernel - [PATCH 4/4] fs: proc: use DEFINE_PROC_SHOW

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Message-Id: <20211101093518.86845-5-songmuchun@bytedance.com>
Date:   Mon,  1 Nov 2021 17:35:18 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     akpm@...ux-foundation.org, adobriyan@...il.com,
        gladkov.alexey@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH 4/4] fs: proc: use DEFINE_PROC_SHOW_ATTRIBUTE() to simplify the code

DEFINE_PROC_SHOW_ATTRIBUTE() can be used here to simplify the code.

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 fs/cifs/cifs_debug.c | 17 ++---------------
 fs/nfsd/stats.c      | 15 ++-------------
 net/sunrpc/stats.c   | 15 ++-------------
 3 files changed, 6 insertions(+), 41 deletions(-)

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index de2c12bcfa4b..52afe68dc7d0 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -1002,7 +1002,7 @@ static const struct proc_ops cifs_security_flags_proc_ops = {
 };
 
 /* To make it easier to debug, can help to show mount params */
-static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
+static int cifs_mount_params_show(struct seq_file *m, void *v)
 {
 	const struct fs_parameter_spec *p;
 	const char *type;
@@ -1030,20 +1030,7 @@ static int cifs_mount_params_proc_show(struct seq_file *m, void *v)
 
 	return 0;
 }
-
-static int cifs_mount_params_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, cifs_mount_params_proc_show, NULL);
-}
-
-static const struct proc_ops cifs_mount_params_proc_ops = {
-	.proc_open	= cifs_mount_params_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= single_release,
-	/* No need for write for now */
-	/* .proc_write	= cifs_mount_params_proc_write, */
-};
+DEFINE_PROC_SHOW_ATTRIBUTE(cifs_mount_params);
 
 #else
 inline void cifs_proc_init(void)
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 1d3b881e7382..47af3e7bfe9a 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -32,7 +32,7 @@ struct svc_stat		nfsd_svcstats = {
 	.program	= &nfsd_program,
 };
 
-static int nfsd_proc_show(struct seq_file *seq, void *v)
+static int nfsd_show(struct seq_file *seq, void *v)
 {
 	int i;
 
@@ -71,18 +71,7 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
 
 	return 0;
 }
-
-static int nfsd_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, nfsd_proc_show, NULL);
-}
-
-static const struct proc_ops nfsd_proc_ops = {
-	.proc_open	= nfsd_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= single_release,
-};
+DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
 
 int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
 {
diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
index 3d1c4f9a5191..110bbc260933 100644
--- a/net/sunrpc/stats.c
+++ b/net/sunrpc/stats.c
@@ -34,7 +34,7 @@
 /*
  * Get RPC client stats
  */
-static int rpc_proc_show(struct seq_file *seq, void *v) {
+static int rpc_show(struct seq_file *seq, void *v) {
 	const struct rpc_stat	*statp = seq->private;
 	const struct rpc_program *prog = statp->program;
 	unsigned int i, j;
@@ -63,18 +63,7 @@ static int rpc_proc_show(struct seq_file *seq, void *v) {
 	}
 	return 0;
 }
-
-static int rpc_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, rpc_proc_show, inode->i_private);
-}
-
-static const struct proc_ops rpc_proc_ops = {
-	.proc_open	= rpc_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= single_release,
-};
+DEFINE_PROC_SHOW_ATTRIBUTE(rpc);
 
 /*
  * Get RPC server stats
-- 
2.11.0