[PATCH] fuse: extend semantics of connected flag

The ->connected flag for a fuse_conn object previously only indicated whether
the device file for this connection is currently open or not.

Change it's meaning so that it indicates whether the connection is active or
not: now either umount or device release will clear the flag.

The separate ->mounted flag is still needed for handling background requests.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 6 insertions, 4 deletions

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 609875d..5cd43bf 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -26,7 +26,7 @@ static struct fuse_conn *fuse_get_conn(struct file *file)
 	struct fuse_conn *fc;
 	spin_lock(&fuse_lock);
 	fc = file->private_data;
-	if (fc && !fc->mounted)
+	if (fc && !fc->connected)
 		fc = NULL;
 	spin_unlock(&fuse_lock);
 	return fc;
@@ -594,7 +594,7 @@ static void request_wait(struct fuse_conn *fc)
 	DECLARE_WAITQUEUE(wait, current);
 
 	add_wait_queue_exclusive(&fc->waitq, &wait);
-	while (fc->mounted && list_empty(&fc->pending)) {
+	while (fc->connected && list_empty(&fc->pending)) {
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (signal_pending(current))
 			break;
@@ -634,7 +634,7 @@ static ssize_t fuse_dev_readv(struct file *file, const struct iovec *iov,
 		goto err_unlock;
 	request_wait(fc);
 	err = -ENODEV;
-	if (!fc->mounted)
+	if (!fc->connected)
 		goto err_unlock;
 	err = -ERESTARTSYS;
 	if (list_empty(&fc->pending))
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 5742253..e824a09 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -249,7 +249,8 @@ struct fuse_conn {
 	/** Mount is active */
 	unsigned mounted : 1;
 
-	/** Connection established */
+	/** Connection established, cleared on umount and device
+	    release */
 	unsigned connected : 1;
 
 	/** Connection failed (version mismatch) */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index d7aaffe..d6a09fd 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -200,6 +200,7 @@ static void fuse_put_super(struct super_block *sb)
 
 	spin_lock(&fuse_lock);
 	fc->mounted = 0;
+	fc->connected = 0;
 	/* Flush all readers on this fs */
 	wake_up_all(&fc->waitq);
 	up_write(&fc->sbput_sem);