From 7cdfc3a1c3971c9125c317cb8c2525745851798e Mon Sep 17 00:00:00 2001
From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Mon, 16 Apr 2007 17:28:51 -0700
Subject: ocfs2: Remember rw lock level during direct io

Cluster locking might have been redone because a direct write won't
complete, so this needs to be reflected in the iocb.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
---
 fs/ocfs2/aops.c |  9 +++++++--
 fs/ocfs2/aops.h | 13 ++++++++++---
 fs/ocfs2/file.c |  4 ++--
 3 files changed, 19 insertions(+), 7 deletions(-)

(limited to 'fs')

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index b74971e19d54..56963e6c46c0 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -522,12 +522,17 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
 			     void *private)
 {
 	struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
+	int level;
 
 	/* this io's submitter should not have unlocked this before we could */
 	BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
+
 	ocfs2_iocb_clear_rw_locked(iocb);
-	up_read(&inode->i_alloc_sem);
-	ocfs2_rw_unlock(inode, 0);
+
+	level = ocfs2_iocb_rw_locked_level(iocb);
+	if (!level)
+		up_read(&inode->i_alloc_sem);
+	ocfs2_rw_unlock(inode, level);
 }
 
 /*
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 1b4ba5356a42..45821d479b5a 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -97,9 +97,16 @@ int ocfs2_map_and_write_splice_data(struct inode *inode,
 /* all ocfs2_dio_end_io()'s fault */
 #define ocfs2_iocb_is_rw_locked(iocb) \
 	test_bit(0, (unsigned long *)&iocb->private)
-#define ocfs2_iocb_set_rw_locked(iocb) \
-	set_bit(0, (unsigned long *)&iocb->private)
+static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
+{
+	set_bit(0, (unsigned long *)&iocb->private);
+	if (level)
+		set_bit(1, (unsigned long *)&iocb->private);
+	else
+		clear_bit(1, (unsigned long *)&iocb->private);
+}
 #define ocfs2_iocb_clear_rw_locked(iocb) \
 	clear_bit(0, (unsigned long *)&iocb->private)
-
+#define ocfs2_iocb_rw_locked_level(iocb) \
+	test_bit(1, (unsigned long *)&iocb->private)
 #endif /* OCFS2_FILE_H */
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e34474c04678..520a2a6d7670 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1542,7 +1542,7 @@ relock:
 	pos = *ppos;
 
 	/* communicate with ocfs2_dio_end_io */
-	ocfs2_iocb_set_rw_locked(iocb);
+	ocfs2_iocb_set_rw_locked(iocb, rw_level);
 
 	if (direct_io) {
 		written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
@@ -1788,7 +1788,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
 		}
 		rw_level = 0;
 		/* communicate with ocfs2_dio_end_io */
-		ocfs2_iocb_set_rw_locked(iocb);
+		ocfs2_iocb_set_rw_locked(iocb, rw_level);
 	}
 
 	/*
-- 
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