From dcaca3e08c138e6de35a769b752f5496f3488cf2 Mon Sep 17 00:00:00 2001
From: Yehuda Sadeh <yehuda@hq.newdream.net>
Date: Wed, 1 Apr 2009 14:22:41 -0700
Subject: [PATCH] kclient: debugfs for caps reservation system

---
 src/kernel/caps.c    | 13 +++++++++++++
 src/kernel/debugfs.c | 24 ++++++++++++++++++++++++
 src/kernel/super.h   |  1 +
 3 files changed, 38 insertions(+)

diff --git a/src/kernel/caps.c b/src/kernel/caps.c
index 4301628ad02aa..66bf49235448e 100644
--- a/src/kernel/caps.c
+++ b/src/kernel/caps.c
@@ -2088,3 +2088,16 @@ void ceph_put_cap(struct ceph_cap *cap)
 	list_add(&cap->caps_item, &caps_list);
 	spin_unlock(&caps_list_lock);
 }
+
+void ceph_reservation_status(int *total, int *used, int *reserved)
+{
+	if (total)
+		*total = caps_count;
+
+	if (used)
+		*used = caps_use_count;
+
+	if (reserved)
+		*reserved = caps_reserve_count;
+}
+
diff --git a/src/kernel/debugfs.c b/src/kernel/debugfs.c
index de664447cc6c5..0d95dc2a93665 100644
--- a/src/kernel/debugfs.c
+++ b/src/kernel/debugfs.c
@@ -12,6 +12,7 @@ static struct dentry *ceph_debugfs_debug;
 static struct dentry *ceph_debugfs_debug_msgr;
 static struct dentry *ceph_debugfs_debug_console;
 static struct dentry *ceph_debugfs_debug_mask;
+static struct dentry *ceph_debugfs_caps_reservation;
 #ifdef CONFIG_CEPH_BOOKKEEPER
 static struct dentry *ceph_debugfs_bookkeeper;
 #endif
@@ -367,6 +368,19 @@ static int osdc_show(struct seq_file *s, void *p)
 	return 0;
 }
 
+static int caps_reservation_show(struct seq_file *s, void *p)
+{
+	int total, used, reserved;
+
+	ceph_reservation_status(&total, &used, &reserved);
+
+	seq_printf(s, "total\t%d\n"
+		      "used\t%d\n"
+		      "reserved\t%d\n",
+		      total, used, reserved);
+	return 0;
+}
+
 #define DEFINE_SHOW_FUNC(name) 						\
 static int name##_open(struct inode *inode, struct file *file)		\
 {									\
@@ -393,6 +407,7 @@ DEFINE_SHOW_FUNC(osdmap_show)
 DEFINE_SHOW_FUNC(monc_show)
 DEFINE_SHOW_FUNC(mdsc_show)
 DEFINE_SHOW_FUNC(osdc_show)
+DEFINE_SHOW_FUNC(caps_reservation_show)
 
 #ifdef CONFIG_CEPH_BOOKKEEPER
 static int debugfs_bookkeeper_set(void *data, u64 val)
@@ -449,6 +464,14 @@ int ceph_debugfs_init(void)
 	if (!ceph_debugfs_debug_mask)
 		goto out;
 
+	ceph_debugfs_caps_reservation = debugfs_create_file("caps_reservation",
+					0400,
+					ceph_debugfs_dir,
+					NULL,
+					&caps_reservation_show_fops);
+	if (!ceph_debugfs_caps_reservation)
+		goto out;
+
 #ifdef CONFIG_CEPH_BOOKKEEPER
 	ceph_debugfs_bookkeeper = debugfs_create_file("show_bookkeeper",
 					0600,
@@ -467,6 +490,7 @@ out:
 
 void ceph_debugfs_cleanup(void)
 {
+	debugfs_remove(ceph_debugfs_caps_reservation);
 	debugfs_remove(ceph_debugfs_debug_console);
 	debugfs_remove(ceph_debugfs_debug_mask);
 	debugfs_remove(ceph_debugfs_debug_msgr);
diff --git a/src/kernel/super.h b/src/kernel/super.h
index 97502bbdb9f85..17632e3c67d25 100644
--- a/src/kernel/super.h
+++ b/src/kernel/super.h
@@ -517,6 +517,7 @@ extern int ceph_unreserve_caps(struct ceph_caps_reservation *ctx);
 extern struct ceph_cap *ceph_get_cap(struct ceph_caps_reservation *ctx, int mode);
 extern struct ceph_cap *ceph_get_reserved_cap(struct ceph_caps_reservation *ctx);
 extern void ceph_put_cap(struct ceph_cap *cap);
+extern void ceph_reservation_status(int *total, int *used, int *reserved);
 
 static inline struct ceph_client *ceph_inode_to_client(struct inode *inode)
 {
-- 
2.39.5