[PATCH 18/19] fs: add unlocked helpers

[Dmitry Monakhov <dmonakhov@xxxxxxxxxx>]

inode_{add,sub}_bytes will be used by dquot code

Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
 fs/quota/dquot.c   |   50 ++++++++++++++++++++++++++++++++++++++------------
 fs/stat.c          |   15 ++++++++++++---
 include/linux/fs.h |    2 ++
 3 files changed, 52 insertions(+), 15 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index af3413e..b2cf04d 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -246,6 +246,7 @@ struct dqstats dqstats;
 EXPORT_SYMBOL(dqstats);
 
 static qsize_t inode_get_rsv_space(struct inode *inode);
+static qsize_t __inode_get_rsv_space(struct inode *inode);
 static void __dquot_initialize(struct inode *inode, int type);
 
 static inline unsigned int
@@ -1592,11 +1593,17 @@ void inode_add_rsv_space(struct inode *inode, qsize_t number)
 }
 EXPORT_SYMBOL(inode_add_rsv_space);
 
-void inode_claim_rsv_space(struct inode *inode, qsize_t number)
+inline void __inode_claim_rsv_space(struct inode *inode, qsize_t number)
 {
-	spin_lock(&inode->i_lock);
 	*inode_reserved_space(inode) -= number;
 	__inode_add_bytes(inode, number);
+
+}
+
+void inode_claim_rsv_space(struct inode *inode, qsize_t number)
+{
+	spin_lock(&inode->i_lock);
+	__inode_claim_rsv_space(inode, number);
 	spin_unlock(&inode->i_lock);
 }
 EXPORT_SYMBOL(inode_claim_rsv_space);
@@ -1609,33 +1616,52 @@ void inode_sub_rsv_space(struct inode *inode, qsize_t number)
 }
 EXPORT_SYMBOL(inode_sub_rsv_space);
 
-static qsize_t inode_get_rsv_space(struct inode *inode)
+static qsize_t __inode_get_rsv_space(struct inode *inode)
 {
-	qsize_t ret;
-
 	if (!dqctl(inode->i_sb)->dq_op->get_reserved_space)
 		return 0;
+	return *inode_reserved_space(inode);
+}
+
+static qsize_t inode_get_rsv_space(struct inode *inode)
+{
+	qsize_t ret;
 	spin_lock(&inode->i_lock);
-	ret = *inode_reserved_space(inode);
+	ret = __inode_get_rsv_space(inode);
 	spin_unlock(&inode->i_lock);
 	return ret;
 }
 
-static void inode_incr_space(struct inode *inode, qsize_t number,
+static void __inode_incr_space(struct inode *inode, qsize_t number,
 				int reserve)
 {
 	if (reserve)
-		inode_add_rsv_space(inode, number);
+		*inode_reserved_space(inode) += number;
 	else
-		inode_add_bytes(inode, number);
+		__inode_add_bytes(inode, number);
 }
 
-static void inode_decr_space(struct inode *inode, qsize_t number, int reserve)
+static void inode_incr_space(struct inode *inode, qsize_t number,
+				int reserve)
+{
+	spin_lock(&inode->i_lock);
+	__inode_incr_space(inode, number, reserve);
+	spin_unlock(&inode->i_lock);
+}
+
+
+static void __inode_decr_space(struct inode *inode, qsize_t number, int reserve)
 {
 	if (reserve)
-		inode_sub_rsv_space(inode, number);
+		*inode_reserved_space(inode) -= number;
 	else
-		inode_sub_bytes(inode, number);
+		__inode_sub_bytes(inode, number);
+}
+static void inode_decr_space(struct inode *inode, qsize_t number, int reserve)
+{
+	spin_lock(&inode->i_lock);
+	__inode_decr_space(inode, number, reserve);
+	spin_unlock(&inode->i_lock);
 }
 
 /*
diff --git a/fs/stat.c b/fs/stat.c
index 12e90e2..f2da983 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -429,9 +429,8 @@ void inode_add_bytes(struct inode *inode, loff_t bytes)
 
 EXPORT_SYMBOL(inode_add_bytes);
 
-void inode_sub_bytes(struct inode *inode, loff_t bytes)
+void __inode_sub_bytes(struct inode *inode, loff_t bytes)
 {
-	spin_lock(&inode->i_lock);
 	inode->i_blocks -= bytes >> 9;
 	bytes &= 511;
 	if (inode->i_bytes < bytes) {
@@ -439,17 +438,27 @@ void inode_sub_bytes(struct inode *inode, loff_t bytes)
 		inode->i_bytes += 512;
 	}
 	inode->i_bytes -= bytes;
+}
+
+void inode_sub_bytes(struct inode *inode, loff_t bytes)
+{
+	spin_lock(&inode->i_lock);
+	__inode_sub_bytes(inode, bytes);
 	spin_unlock(&inode->i_lock);
 }
 
 EXPORT_SYMBOL(inode_sub_bytes);
 
+inline loff_t __inode_get_bytes(struct inode *inode)
+{
+	return (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
+}
 loff_t inode_get_bytes(struct inode *inode)
 {
 	loff_t ret;
 
 	spin_lock(&inode->i_lock);
-	ret = (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
+	ret = __inode_get_bytes(inode);
 	spin_unlock(&inode->i_lock);
 	return ret;
 }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e87694a..3ef2ec1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2308,7 +2308,9 @@ extern void generic_fillattr(struct inode *, struct kstat *);
 extern int vfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 void __inode_add_bytes(struct inode *inode, loff_t bytes);
 void inode_add_bytes(struct inode *inode, loff_t bytes);
+void __inode_sub_bytes(struct inode *inode, loff_t bytes);
 void inode_sub_bytes(struct inode *inode, loff_t bytes);
+loff_t __inode_get_bytes(struct inode *inode);
 loff_t inode_get_bytes(struct inode *inode);
 void inode_set_bytes(struct inode *inode, loff_t bytes);
 
-- 
1.6.5.2

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