Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

21 files changed, 324 insertions, 225 deletions

diff --git a/fs/9p/fcall.c b/fs/9p/fcall.c
index 71742ba150c..6f2617820a4 100644
--- a/fs/9p/fcall.c
+++ b/fs/9p/fcall.c
@@ -98,23 +98,20 @@ v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
 static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
 	struct v9fs_fcall *rc, int err)
 {
-	int fid;
+	int fid, id;
 	struct v9fs_session_info *v9ses;
 
-	if (err)
-		return;
-
+	id = 0;
 	fid = tc->params.tclunk.fid;
-	kfree(tc);
-
-	if (!rc)
-		return;
-
-	v9ses = a;
-	if (rc->id == RCLUNK)
-		v9fs_put_idpool(fid, &v9ses->fidpool);
+	if (rc)
+		id = rc->id;
 
+	kfree(tc);
 	kfree(rc);
+	if (id == RCLUNK) {
+		v9ses = a;
+		v9fs_put_idpool(fid, &v9ses->fidpool);
+	}
 }
 
 /**
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
index 3e5b124a721..f4407eb276c 100644
--- a/fs/9p/mux.c
+++ b/fs/9p/mux.c
@@ -50,15 +50,23 @@ enum {
 	Wpending = 8,		/* can write */
 };
 
+enum {
+	None,
+	Flushing,
+	Flushed,
+};
+
 struct v9fs_mux_poll_task;
 
 struct v9fs_req {
+	spinlock_t lock;
 	int tag;
 	struct v9fs_fcall *tcall;
 	struct v9fs_fcall *rcall;
 	int err;
 	v9fs_mux_req_callback cb;
 	void *cba;
+	int flush;
 	struct list_head req_list;
 };
 
@@ -96,8 +104,8 @@ struct v9fs_mux_poll_task {
 
 struct v9fs_mux_rpc {
 	struct v9fs_mux_data *m;
-	struct v9fs_req *req;
 	int err;
+	struct v9fs_fcall *tcall;
 	struct v9fs_fcall *rcall;
 	wait_queue_head_t wqueue;
 };
@@ -524,10 +532,9 @@ again:
 
 static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
 {
-	int ecode, tag;
+	int ecode;
 	struct v9fs_str *ename;
 
-	tag = req->tag;
 	if (!req->err && req->rcall->id == RERROR) {
 		ecode = req->rcall->params.rerror.errno;
 		ename = &req->rcall->params.rerror.error;
@@ -553,23 +560,6 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
 		if (!req->err)
 			req->err = -EIO;
 	}
-
-	if (req->err == ERREQFLUSH)
-		return;
-
-	if (req->cb) {
-		dprintk(DEBUG_MUX, "calling callback tcall %p rcall %p\n",
-			req->tcall, req->rcall);
-
-		(*req->cb) (req->cba, req->tcall, req->rcall, req->err);
-		req->cb = NULL;
-	} else
-		kfree(req->rcall);
-
-	v9fs_mux_put_tag(m, tag);
-
-	wake_up(&m->equeue);
-	kfree(req);
 }
 
 /**
@@ -669,17 +659,26 @@ static void v9fs_read_work(void *a)
 		list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
 			if (rreq->tag == rcall->tag) {
 				req = rreq;
-				req->rcall = rcall;
-				list_del(&req->req_list);
-				spin_unlock(&m->lock);
-				process_request(m, req);
+				if (req->flush != Flushing)
+					list_del(&req->req_list);
 				break;
 			}
-
 		}
+		spin_unlock(&m->lock);
 
-		if (!req) {
-			spin_unlock(&m->lock);
+		if (req) {
+			req->rcall = rcall;
+			process_request(m, req);
+
+			if (req->flush != Flushing) {
+				if (req->cb)
+					(*req->cb) (req, req->cba);
+				else
+					kfree(req->rcall);
+
+				wake_up(&m->equeue);
+			}
+		} else {
 			if (err >= 0 && rcall->id != RFLUSH)
 				dprintk(DEBUG_ERROR,
 					"unexpected response mux %p id %d tag %d\n",
@@ -746,7 +745,6 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
 		return ERR_PTR(-ENOMEM);
 
 	v9fs_set_tag(tc, n);
-
 	if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
 		char buf[150];
 
@@ -754,12 +752,14 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
 		printk(KERN_NOTICE "<<< %p %s\n", m, buf);
 	}
 
+	spin_lock_init(&req->lock);
 	req->tag = n;
 	req->tcall = tc;
 	req->rcall = NULL;
 	req->err = 0;
 	req->cb = cb;
 	req->cba = cba;
+	req->flush = None;
 
 	spin_lock(&m->lock);
 	list_add_tail(&req->req_list, &m->unsent_req_list);
@@ -776,72 +776,108 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
 	return req;
 }
 
-static void v9fs_mux_flush_cb(void *a, struct v9fs_fcall *tc,
-			      struct v9fs_fcall *rc, int err)
+static void v9fs_mux_free_request(struct v9fs_mux_data *m, struct v9fs_req *req)
+{
+	v9fs_mux_put_tag(m, req->tag);
+	kfree(req);
+}
+
+static void v9fs_mux_flush_cb(struct v9fs_req *freq, void *a)
 {
 	v9fs_mux_req_callback cb;
 	int tag;
 	struct v9fs_mux_data *m;
-	struct v9fs_req *req, *rptr;
+	struct v9fs_req *req, *rreq, *rptr;
 
 	m = a;
-	dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m, tc,
-		rc, err, tc->params.tflush.oldtag);
+	dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m,
+		freq->tcall, freq->rcall, freq->err,
+		freq->tcall->params.tflush.oldtag);
 
 	spin_lock(&m->lock);
 	cb = NULL;
-	tag = tc->params.tflush.oldtag;
-	list_for_each_entry_safe(req, rptr, &m->req_list, req_list) {
-		if (req->tag == tag) {
+	tag = freq->tcall->params.tflush.oldtag;
+	req = NULL;
+	list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
+		if (rreq->tag == tag) {
+			req = rreq;
 			list_del(&req->req_list);
-			if (req->cb) {
-				cb = req->cb;
-				req->cb = NULL;
-				spin_unlock(&m->lock);
-				(*cb) (req->cba, req->tcall, req->rcall,
-				       req->err);
-			}
-			kfree(req);
-			wake_up(&m->equeue);
 			break;
 		}
 	}
+	spin_unlock(&m->lock);
 
-	if (!cb)
-		spin_unlock(&m->lock);
+	if (req) {
+		spin_lock(&req->lock);
+		req->flush = Flushed;
+		spin_unlock(&req->lock);
+
+		if (req->cb)
+			(*req->cb) (req, req->cba);
+		else
+			kfree(req->rcall);
+
+		wake_up(&m->equeue);
+	}
 
-	v9fs_mux_put_tag(m, tag);
-	kfree(tc);
-	kfree(rc);
+	kfree(freq->tcall);
+	kfree(freq->rcall);
+	v9fs_mux_free_request(m, freq);
 }
 
-static void
+static int
 v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req)
 {
 	struct v9fs_fcall *fc;
+	struct v9fs_req *rreq, *rptr;
 
 	dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
 
+	/* if a response was received for a request, do nothing */
+	spin_lock(&req->lock);
+	if (req->rcall || req->err) {
+		spin_unlock(&req->lock);
+		dprintk(DEBUG_MUX, "mux %p req %p response already received\n", m, req);
+		return 0;
+	}
+
+	req->flush = Flushing;
+	spin_unlock(&req->lock);
+
+	spin_lock(&m->lock);
+	/* if the request is not sent yet, just remove it from the list */
+	list_for_each_entry_safe(rreq, rptr, &m->unsent_req_list, req_list) {
+		if (rreq->tag == req->tag) {
+			dprintk(DEBUG_MUX, "mux %p req %p request is not sent yet\n", m, req);
+			list_del(&rreq->req_list);
+			req->flush = Flushed;
+			spin_unlock(&m->lock);
+			if (req->cb)
+				(*req->cb) (req, req->cba);
+			return 0;
+		}
+	}
+	spin_unlock(&m->lock);
+
+	clear_thread_flag(TIF_SIGPENDING);
 	fc = v9fs_create_tflush(req->tag);
 	v9fs_send_request(m, fc, v9fs_mux_flush_cb, m);
+	return 1;
 }
 
 static void
-v9fs_mux_rpc_cb(void *a, struct v9fs_fcall *tc, struct v9fs_fcall *rc, int err)
+v9fs_mux_rpc_cb(struct v9fs_req *req, void *a)
 {
 	struct v9fs_mux_rpc *r;
 
-	if (err == ERREQFLUSH) {
-		kfree(rc);
-		dprintk(DEBUG_MUX, "err req flush\n");
-		return;
-	}
-
+	dprintk(DEBUG_MUX, "req %p r %p\n", req, a);
 	r = a;
-	dprintk(DEBUG_MUX, "mux %p req %p tc %p rc %p err %d\n", r->m, r->req,
-		tc, rc, err);
-	r->rcall = rc;
-	r->err = err;
+	r->rcall = req->rcall;
+	r->err = req->err;
+
+	if (req->flush!=None && !req->err)
+		r->err = -ERESTARTSYS;
+
 	wake_up(&r->wqueue);
 }
 
@@ -856,12 +892,13 @@ int
 v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
 	     struct v9fs_fcall **rc)
 {
-	int err;
+	int err, sigpending;
 	unsigned long flags;
 	struct v9fs_req *req;
 	struct v9fs_mux_rpc r;
 
 	r.err = 0;
+	r.tcall = tc;
 	r.rcall = NULL;
 	r.m = m;
 	init_waitqueue_head(&r.wqueue);
@@ -869,48 +906,50 @@ v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
 	if (rc)
 		*rc = NULL;
 
+	sigpending = 0;
+	if (signal_pending(current)) {
+		sigpending = 1;
+		clear_thread_flag(TIF_SIGPENDING);
+	}
+
 	req = v9fs_send_request(m, tc, v9fs_mux_rpc_cb, &r);
 	if (IS_ERR(req)) {
 		err = PTR_ERR(req);
 		dprintk(DEBUG_MUX, "error %d\n", err);
-		return PTR_ERR(req);
+		return err;
 	}
 
-	r.req = req;
-	dprintk(DEBUG_MUX, "mux %p tc %p tag %d rpc %p req %p\n", m, tc,
-		req->tag, &r, req);
 	err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
 	if (r.err < 0)
 		err = r.err;
 
 	if (err == -ERESTARTSYS && m->trans->status == Connected && m->err == 0) {
-		spin_lock(&m->lock);
-		req->tcall = NULL;
-		req->err = ERREQFLUSH;
-		spin_unlock(&m->lock);
+		if (v9fs_mux_flush_request(m, req)) {
+			/* wait until we get response of the flush message */
+			do {
+				clear_thread_flag(TIF_SIGPENDING);
+				err = wait_event_interruptible(r.wqueue,
+					r.rcall || r.err);
+			} while (!r.rcall && !r.err && err==-ERESTARTSYS &&
+				m->trans->status==Connected && !m->err);
+		}
+		sigpending = 1;
+	}
 
-		clear_thread_flag(TIF_SIGPENDING);
-		v9fs_mux_flush_request(m, req);
+	if (sigpending) {
 		spin_lock_irqsave(&current->sighand->siglock, flags);
 		recalc_sigpending();
 		spin_unlock_irqrestore(&current->sighand->siglock, flags);
 	}
 
-	if (!err) {
-		if (r.rcall)
-			dprintk(DEBUG_MUX, "got response id %d tag %d\n",
-				r.rcall->id, r.rcall->tag);
-
-		if (rc)
-			*rc = r.rcall;
-		else
-			kfree(r.rcall);
-	} else {
+	if (rc)
+		*rc = r.rcall;
+	else
 		kfree(r.rcall);
-		dprintk(DEBUG_MUX, "got error %d\n", err);
-		if (err > 0)
-			err = -EIO;
-	}
+
+	v9fs_mux_free_request(m, req);
+	if (err > 0)
+		err = -EIO;
 
 	return err;
 }
@@ -951,12 +990,15 @@ void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
 	struct v9fs_req *req, *rtmp;
 	LIST_HEAD(cancel_list);
 
-	dprintk(DEBUG_MUX, "mux %p err %d\n", m, err);
+	dprintk(DEBUG_ERROR, "mux %p err %d\n", m, err);
 	m->err = err;
 	spin_lock(&m->lock);
 	list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) {
 		list_move(&req->req_list, &cancel_list);
 	}
+	list_for_each_entry_safe(req, rtmp, &m->unsent_req_list, req_list) {
+		list_move(&req->req_list, &cancel_list);
+	}
 	spin_unlock(&m->lock);
 
 	list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) {
@@ -965,11 +1007,9 @@ void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
 			req->err = err;
 
 		if (req->cb)
-			(*req->cb) (req->cba, req->tcall, req->rcall, req->err);
+			(*req->cb) (req, req->cba);
 		else
 			kfree(req->rcall);
-
-		kfree(req);
 	}
 
 	wake_up(&m->equeue);
diff --git a/fs/9p/mux.h b/fs/9p/mux.h
index e90bfd32ea4..fb10c50186a 100644
--- a/fs/9p/mux.h
+++ b/fs/9p/mux.h
@@ -24,6 +24,7 @@
  */
 
 struct v9fs_mux_data;
+struct v9fs_req;
 
 /**
  * v9fs_mux_req_callback - callback function that is called when the
@@ -36,8 +37,7 @@ struct v9fs_mux_data;
  * @rc - response call
  * @err - error code (non-zero if error occured)
  */
-typedef void (*v9fs_mux_req_callback)(void *a, struct v9fs_fcall *tc,
-	struct v9fs_fcall *rc, int err);
+typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a);
 
 int v9fs_mux_global_init(void);
 void v9fs_mux_global_exit(void);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 083dcfcd158..1a8e46084f0 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -72,11 +72,17 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 		return -ENOSPC;
 	}
 
-	err = v9fs_t_walk(v9ses, vfid->fid, fid, NULL, NULL);
+	err = v9fs_t_walk(v9ses, vfid->fid, fid, NULL, &fcall);
 	if (err < 0) {
 		dprintk(DEBUG_ERROR, "rewalk didn't work\n");
-		goto put_fid;
+		if (fcall && fcall->id == RWALK)
+			goto clunk_fid;
+		else {
+			v9fs_put_idpool(fid, &v9ses->fidpool);
+			goto free_fcall;
+		}
 	}
+	kfree(fcall);
 
 	/* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
 	/* translate open mode appropriately */
@@ -109,8 +115,7 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 clunk_fid:
 	v9fs_t_clunk(v9ses, fid);
 
-put_fid:
-	v9fs_put_idpool(fid, &v9ses->fidpool);
+free_fcall:
 	kfree(fcall);
 
 	return err;
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 133db366d30..2cb87ba4b1c 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -270,7 +270,10 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm,
 	err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
 	if (err < 0) {
 		PRINT_FCALL_ERROR("clone error", fcall);
-		goto put_fid;
+		if (fcall && fcall->id == RWALK)
+			goto clunk_fid;
+		else
+			goto put_fid;
 	}
 	kfree(fcall);
 
@@ -322,6 +325,9 @@ v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
 		&fcall);
 
 	if (err < 0) {
+		if (fcall && fcall->id == RWALK)
+			goto clunk_fid;
+
 		PRINT_FCALL_ERROR("walk error", fcall);
 		v9fs_put_idpool(nfid, &v9ses->fidpool);
 		goto error;
@@ -640,19 +646,26 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 	}
 
 	result = v9fs_t_walk(v9ses, dirfidnum, newfid,
-		(char *)dentry->d_name.name, NULL);
+		(char *)dentry->d_name.name, &fcall);
+
 	if (result < 0) {
-		v9fs_put_idpool(newfid, &v9ses->fidpool);
+		if (fcall && fcall->id == RWALK)
+			v9fs_t_clunk(v9ses, newfid);
+		else
+			v9fs_put_idpool(newfid, &v9ses->fidpool);
+
 		if (result == -ENOENT) {
 			d_add(dentry, NULL);
 			dprintk(DEBUG_VFS,
 				"Return negative dentry %p count %d\n",
 				dentry, atomic_read(&dentry->d_count));
+			kfree(fcall);
 			return NULL;
 		}
 		dprintk(DEBUG_ERROR, "walk error:%d\n", result);
 		goto FreeFcall;
 	}
+	kfree(fcall);
 
 	result = v9fs_t_stat(v9ses, newfid, &fcall);
 	if (result < 0) {
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 57c4903614e..d6603d02304 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -74,8 +74,8 @@ struct autofs_wait_queue {
 	struct autofs_wait_queue *next;
 	autofs_wqt_t wait_queue_token;
 	/* We use the following to see what we are waiting for */
-	int hash;
-	int len;
+	unsigned int hash;
+	unsigned int len;
 	char *name;
 	u32 dev;
 	u64 ino;
@@ -85,7 +85,6 @@ struct autofs_wait_queue {
 	pid_t tgid;
 	/* This is for status reporting upon return */
 	int status;
-	atomic_t notify;
 	atomic_t wait_ctr;
 };
 
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 84e030c8ddd..5100f984783 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -327,6 +327,7 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
 static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
 	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+	struct autofs_info *ino = autofs4_dentry_ino(dentry);
 	int oz_mode = autofs4_oz_mode(sbi);
 	unsigned int lookup_type;
 	int status;
@@ -340,13 +341,8 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
 	if (oz_mode || !lookup_type)
 		goto done;
 
-	/*
-	 * If a request is pending wait for it.
-	 * If it's a mount then it won't be expired till at least
-	 * a liitle later and if it's an expire then we might need
-	 * to mount it again.
-	 */
-	if (autofs4_ispending(dentry)) {
+	/* If an expire request is pending wait for it. */
+	if (ino && (ino->flags & AUTOFS_INF_EXPIRING)) {
 		DPRINTK("waiting for active request %p name=%.*s",
 			dentry, dentry->d_name.len, dentry->d_name.name);
 
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 142ab6aa2aa..ce103e7b0bc 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -189,14 +189,30 @@ static int autofs4_getpath(struct autofs_sb_info *sbi,
 	return len;
 }
 
+static struct autofs_wait_queue *
+autofs4_find_wait(struct autofs_sb_info *sbi,
+		  char *name, unsigned int hash, unsigned int len)
+{
+	struct autofs_wait_queue *wq;
+
+	for (wq = sbi->queues; wq; wq = wq->next) {
+		if (wq->hash == hash &&
+		    wq->len == len &&
+		    wq->name && !memcmp(wq->name, name, len))
+			break;
+	}
+	return wq;
+}
+
 int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		enum autofs_notify notify)
 {
+	struct autofs_info *ino;
 	struct autofs_wait_queue *wq;
 	char *name;
 	unsigned int len = 0;
 	unsigned int hash = 0;
-	int status;
+	int status, type;
 
 	/* In catatonic mode, we don't wait for nobody */
 	if (sbi->catatonic)
@@ -223,21 +239,41 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		return -EINTR;
 	}
 
-	for (wq = sbi->queues ; wq ; wq = wq->next) {
-		if (wq->hash == dentry->d_name.hash &&
-		    wq->len == len &&
-		    wq->name && !memcmp(wq->name, name, len))
-			break;
-	}
+	wq = autofs4_find_wait(sbi, name, hash, len);
+	ino = autofs4_dentry_ino(dentry);
+	if (!wq && ino && notify == NFY_NONE) {
+		/*
+		 * Either we've betean the pending expire to post it's
+		 * wait or it finished while we waited on the mutex.
+		 * So we need to wait till either, the wait appears
+		 * or the expire finishes.
+		 */
+
+		while (ino->flags & AUTOFS_INF_EXPIRING) {
+			mutex_unlock(&sbi->wq_mutex);
+			schedule_timeout_interruptible(HZ/10);
+			if (mutex_lock_interruptible(&sbi->wq_mutex)) {
+				kfree(name);
+				return -EINTR;
+			}
+			wq = autofs4_find_wait(sbi, name, hash, len);
+			if (wq)
+				break;
+		}
 
-	if (!wq) {
-		/* Can't wait for an expire if there's no mount */
-		if (notify == NFY_NONE && !d_mountpoint(dentry)) {
+		/*
+		 * Not ideal but the status has already gone. Of the two
+		 * cases where we wait on NFY_NONE neither depend on the
+		 * return status of the wait.
+		 */
+		if (!wq) {
 			kfree(name);
 			mutex_unlock(&sbi->wq_mutex);
-			return -ENOENT;
+			return 0;
 		}
+	}
 
+	if (!wq) {
 		/* Create a new wait queue */
 		wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL);
 		if (!wq) {
@@ -263,20 +299,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		wq->tgid = current->tgid;
 		wq->status = -EINTR; /* Status return if interrupted */
 		atomic_set(&wq->wait_ctr, 2);
-		atomic_set(&wq->notify, 1);
-		mutex_unlock(&sbi->wq_mutex);
-	} else {
-		atomic_inc(&wq->wait_ctr);
 		mutex_unlock(&sbi->wq_mutex);
-		kfree(name);
-		DPRINTK("existing wait id = 0x%08lx, name = %.*s, nfy=%d",
-			(unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
-	}
-
-	if (notify != NFY_NONE && atomic_read(&wq->notify)) {
-		int type;
-
-		atomic_dec(&wq->notify);
 
 		if (sbi->version < 5) {
 			if (notify == NFY_MOUNT)
@@ -299,6 +322,12 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 
 		/* autofs4_notify_daemon() may block */
 		autofs4_notify_daemon(sbi, wq, type);
+	} else {
+		atomic_inc(&wq->wait_ctr);
+		mutex_unlock(&sbi->wq_mutex);
+		kfree(name);
+		DPRINTK("existing wait id = 0x%08lx, name = %.*s, nfy=%d",
+			(unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
 	}
 
 	/* wq->name is NULL if and only if the lock is already released */
diff --git a/fs/compat.c b/fs/compat.c
index 3f3e8f4d43d..01f39f87f37 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1323,7 +1323,7 @@ compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
 {
 	unsigned i;
 	struct iovec *iov;
-	if (nr_segs >= UIO_MAXIOV)
+	if (nr_segs > UIO_MAXIOV)
 		return -EINVAL;
 	iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
 	for (i = 0; i < nr_segs; i++) {
@@ -1913,7 +1913,7 @@ asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 	}
 
 	if (sigmask) {
-		if (sigsetsize |= sizeof(compat_sigset_t))
+		if (sigsetsize != sizeof(compat_sigset_t))
 			return -EINVAL;
 		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
 			return -EFAULT;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 48ae0339af1..2edd7eec88f 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -711,7 +711,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 	 * direct blocks blocks
 	 */
 	if (num == 0 && blks > 1) {
-		current_block = le32_to_cpu(where->key + 1);
+		current_block = le32_to_cpu(where->key) + 1;
 		for (i = 1; i < blks; i++)
 			*(where->p + i ) = cpu_to_le32(current_block++);
 	}
@@ -724,7 +724,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
 	if (block_i) {
 		block_i->last_alloc_logical_block = block + blks - 1;
 		block_i->last_alloc_physical_block =
-				le32_to_cpu(where[num].key + blks - 1);
+				le32_to_cpu(where[num].key) + blks - 1;
 	}
 
 	/* We are done with atomic stuff, now do the rest of housekeeping */
@@ -814,11 +814,13 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 
 	/* Simplest case - block found, no allocation needed */
 	if (!partial) {
-		first_block = chain[depth - 1].key;
+		first_block = le32_to_cpu(chain[depth - 1].key);
 		clear_buffer_new(bh_result);
 		count++;
 		/*map more blocks*/
 		while (count < maxblocks && count <= blocks_to_boundary) {
+			unsigned long blk;
+
 			if (!verify_chain(chain, partial)) {
 				/*
 				 * Indirect block might be removed by
@@ -831,8 +833,9 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
 				count = 0;
 				break;
 			}
-			if (le32_to_cpu(*(chain[depth-1].p+count) ==
-					(first_block + count)))
+			blk = le32_to_cpu(*(chain[depth-1].p + count));
+
+			if (blk == first_block + count)
 				count++;
 			else
 				break;
diff --git a/fs/locks.c b/fs/locks.c
index efad798824d..6f99c0a6f83 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -446,15 +446,14 @@ static struct lock_manager_operations lease_manager_ops = {
  */
 static int lease_init(struct file *filp, int type, struct file_lock *fl)
  {
+	if (assign_type(fl, type) != 0)
+		return -EINVAL;
+
 	fl->fl_owner = current->files;
 	fl->fl_pid = current->tgid;
 
 	fl->fl_file = filp;
 	fl->fl_flags = FL_LEASE;
-	if (assign_type(fl, type) != 0) {
-		locks_free_lock(fl);
-		return -EINVAL;
-	}
 	fl->fl_start = 0;
 	fl->fl_end = OFFSET_MAX;
 	fl->fl_ops = NULL;
@@ -466,16 +465,19 @@ static int lease_init(struct file *filp, int type, struct file_lock *fl)
 static int lease_alloc(struct file *filp, int type, struct file_lock **flp)
 {
 	struct file_lock *fl = locks_alloc_lock();
-	int error;
+	int error = -ENOMEM;
 
 	if (fl == NULL)
-		return -ENOMEM;
+		goto out;
 
 	error = lease_init(filp, type, fl);
-	if (error)
-		return error;
+	if (error) {
+		locks_free_lock(fl);
+		fl = NULL;
+	}
+out:
 	*flp = fl;
-	return 0;
+	return error;
 }
 
 /* Check if two locks overlap each other.
@@ -1372,6 +1374,7 @@ static int __setlease(struct file *filp, long arg, struct file_lock **flp)
 		goto out;
 
 	if (my_before != NULL) {
+		*flp = *my_before;
 		error = lease->fl_lmops->fl_change(my_before, arg);
 		goto out;
 	}
diff --git a/fs/namespace.c b/fs/namespace.c
index 2c5f1f80bdc..bf478addb85 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -899,13 +899,11 @@ static int do_change_type(struct nameidata *nd, int flag)
 /*
  * do loopback mount.
  */
-static int do_loopback(struct nameidata *nd, char *old_name, unsigned long flags, int mnt_flags)
+static int do_loopback(struct nameidata *nd, char *old_name, int recurse)
 {
 	struct nameidata old_nd;
 	struct vfsmount *mnt = NULL;
-	int recurse = flags & MS_REC;
 	int err = mount_is_safe(nd);
-
 	if (err)
 		return err;
 	if (!old_name || !*old_name)
@@ -939,7 +937,6 @@ static int do_loopback(struct nameidata *nd, char *old_name, unsigned long flags
 		spin_unlock(&vfsmount_lock);
 		release_mounts(&umount_list);
 	}
-	mnt->mnt_flags = mnt_flags;
 
 out:
 	up_write(&namespace_sem);
@@ -1353,7 +1350,7 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
 		retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
 				    data_page);
 	else if (flags & MS_BIND)
-		retval = do_loopback(&nd, dev_name, flags, mnt_flags);
+		retval = do_loopback(&nd, dev_name, flags & MS_REC);
 	else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
 		retval = do_change_type(&nd, flags);
 	else if (flags & MS_MOVE)
diff --git a/fs/open.c b/fs/open.c
index 53ec28c3677..317b7c7f38a 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1124,7 +1124,6 @@ asmlinkage long sys_openat(int dfd, const char __user *filename, int flags,
 	prevent_tail_call(ret);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(sys_openat);
 
 #ifndef __alpha__
 
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 45ae7dd3c65..7ef1f094de9 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -533,6 +533,7 @@ void del_gendisk(struct gendisk *disk)
 
 	devfs_remove_disk(disk);
 
+	kobject_uevent(&disk->kobj, KOBJ_REMOVE);
 	if (disk->holder_dir)
 		kobject_unregister(disk->holder_dir);
 	if (disk->slave_dir)
@@ -545,7 +546,7 @@ void del_gendisk(struct gendisk *disk)
 			kfree(disk_name);
 		}
 		put_device(disk->driverfs_dev);
+		disk->driverfs_dev = NULL;
 	}
-	kobject_uevent(&disk->kobj, KOBJ_REMOVE);
 	kobject_del(&disk->kobj);
 }
diff --git a/fs/smbfs/dir.c b/fs/smbfs/dir.c
index 34c7a11d91f..70d9c5a37f5 100644
--- a/fs/smbfs/dir.c
+++ b/fs/smbfs/dir.c
@@ -434,6 +434,11 @@ smb_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 	if (dentry->d_name.len > SMB_MAXNAMELEN)
 		goto out;
 
+	/* Do not allow lookup of names with backslashes in */
+	error = -EINVAL;
+	if (memchr(dentry->d_name.name, '\\', dentry->d_name.len))
+		goto out;
+
 	lock_kernel();
 	error = smb_proc_getattr(dentry, &finfo);
 #ifdef SMBFS_PARANOIA
diff --git a/fs/smbfs/request.c b/fs/smbfs/request.c
index c71c375863c..c71dd2760d3 100644
--- a/fs/smbfs/request.c
+++ b/fs/smbfs/request.c
@@ -339,9 +339,11 @@ int smb_add_request(struct smb_request *req)
 		/*
 		 * On timeout or on interrupt we want to try and remove the
 		 * request from the recvq/xmitq.
+		 * First check if the request is still part of a queue. (May
+		 * have been removed by some error condition)
 		 */
 		smb_lock_server(server);
-		if (!(req->rq_flags & SMB_REQ_RECEIVED)) {
+		if (!list_empty(&req->rq_queue)) {
 			list_del_init(&req->rq_queue);
 			smb_rput(req);
 		}
diff --git a/fs/splice.c b/fs/splice.c
index 7fb04970c72..a285fd746dc 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -51,7 +51,7 @@ struct splice_pipe_desc {
  * addition of remove_mapping(). If success is returned, the caller may
  * attempt to reuse this page for another destination.
  */
-static int page_cache_pipe_buf_steal(struct pipe_inode_info *info,
+static int page_cache_pipe_buf_steal(struct pipe_inode_info *pipe,
 				     struct pipe_buffer *buf)
 {
 	struct page *page = buf->page;
@@ -78,16 +78,18 @@ static int page_cache_pipe_buf_steal(struct pipe_inode_info *info,
 		return 1;
 	}
 
+	buf->flags |= PIPE_BUF_FLAG_LRU;
 	return 0;
 }
 
-static void page_cache_pipe_buf_release(struct pipe_inode_info *info,
+static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe,
 					struct pipe_buffer *buf)
 {
 	page_cache_release(buf->page);
+	buf->flags &= ~PIPE_BUF_FLAG_LRU;
 }
 
-static int page_cache_pipe_buf_pin(struct pipe_inode_info *info,
+static int page_cache_pipe_buf_pin(struct pipe_inode_info *pipe,
 				   struct pipe_buffer *buf)
 {
 	struct page *page = buf->page;
@@ -141,6 +143,7 @@ static int user_page_pipe_buf_steal(struct pipe_inode_info *pipe,
 	if (!(buf->flags & PIPE_BUF_FLAG_GIFT))
 		return 1;
 
+	buf->flags |= PIPE_BUF_FLAG_LRU;
 	return generic_pipe_buf_steal(pipe, buf);
 }
 
@@ -321,6 +324,8 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
 					      mapping_gfp_mask(mapping));
 			if (unlikely(error)) {
 				page_cache_release(page);
+				if (error == -EEXIST)
+					continue;
 				break;
 			}
 			/*
@@ -497,14 +502,14 @@ EXPORT_SYMBOL(generic_file_splice_read);
  * Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'
  * using sendpage(). Return the number of bytes sent.
  */
-static int pipe_to_sendpage(struct pipe_inode_info *info,
+static int pipe_to_sendpage(struct pipe_inode_info *pipe,
 			    struct pipe_buffer *buf, struct splice_desc *sd)
 {
 	struct file *file = sd->file;
 	loff_t pos = sd->pos;
 	int ret, more;
 
-	ret = buf->ops->pin(info, buf);
+	ret = buf->ops->pin(pipe, buf);
 	if (!ret) {
 		more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
 
@@ -535,7 +540,7 @@ static int pipe_to_sendpage(struct pipe_inode_info *info,
  * SPLICE_F_MOVE isn't set, or we cannot move the page, we simply create
  * a new page in the output file page cache and fill/dirty that.
  */
-static int pipe_to_file(struct pipe_inode_info *info, struct pipe_buffer *buf,
+static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 			struct splice_desc *sd)
 {
 	struct file *file = sd->file;
@@ -549,7 +554,7 @@ static int pipe_to_file(struct pipe_inode_info *info, struct pipe_buffer *buf,
 	/*
 	 * make sure the data in this buffer is uptodate
 	 */
-	ret = buf->ops->pin(info, buf);
+	ret = buf->ops->pin(pipe, buf);
 	if (unlikely(ret))
 		return ret;
 
@@ -566,37 +571,23 @@ static int pipe_to_file(struct pipe_inode_info *info, struct pipe_buffer *buf,
 	 */
 	if ((sd->flags & SPLICE_F_MOVE) && this_len == PAGE_CACHE_SIZE) {
 		/*
-		 * If steal succeeds, buf->page is now pruned from the vm
-		 * side (page cache) and we can reuse it. The page will also
-		 * be locked on successful return.
+		 * If steal succeeds, buf->page is now pruned from the
+		 * pagecache and we can reuse it. The page will also be
+		 * locked on successful return.
 		 */
-		if (buf->ops->steal(info, buf))
+		if (buf->ops->steal(pipe, buf))
 			goto find_page;
 
 		page = buf->page;
-		page_cache_get(page);
-
-		/*
-		 * page must be on the LRU for adding to the pagecache.
-		 * Check this without grabbing the zone lock, if it isn't
-		 * the do grab the zone lock, recheck, and add if necessary.
-		 */
-		if (!PageLRU(page)) {
-			struct zone *zone = page_zone(page);
-
-			spin_lock_irq(&zone->lru_lock);
-			if (!PageLRU(page)) {
-				SetPageLRU(page);
-				add_page_to_inactive_list(zone, page);
-			}
-			spin_unlock_irq(&zone->lru_lock);
-		}
-
 		if (add_to_page_cache(page, mapping, index, gfp_mask)) {
-			page_cache_release(page);
 			unlock_page(page);
 			goto find_page;
 		}
+
+		page_cache_get(page);
+
+		if (!(buf->flags & PIPE_BUF_FLAG_LRU))
+			lru_cache_add(page);
 	} else {
 find_page:
 		page = find_lock_page(mapping, index);
@@ -647,23 +638,36 @@ find_page:
 	}
 
 	ret = mapping->a_ops->prepare_write(file, page, offset, offset+this_len);
-	if (ret == AOP_TRUNCATED_PAGE) {
+	if (unlikely(ret)) {
+		loff_t isize = i_size_read(mapping->host);
+
+		if (ret != AOP_TRUNCATED_PAGE)
+			unlock_page(page);
 		page_cache_release(page);
-		goto find_page;
-	} else if (ret)
+		if (ret == AOP_TRUNCATED_PAGE)
+			goto find_page;
+
+		/*
+		 * prepare_write() may have instantiated a few blocks
+		 * outside i_size.  Trim these off again.
+		 */
+		if (sd->pos + this_len > isize)
+			vmtruncate(mapping->host, isize);
+
 		goto out;
+	}
 
 	if (buf->page != page) {
 		/*
 		 * Careful, ->map() uses KM_USER0!
 		 */
-		char *src = buf->ops->map(info, buf, 1);
+		char *src = buf->ops->map(pipe, buf, 1);
 		char *dst = kmap_atomic(page, KM_USER1);
 
 		memcpy(dst + offset, src + buf->offset, this_len);
 		flush_dcache_page(page);
 		kunmap_atomic(dst, KM_USER1);
-		buf->ops->unmap(info, buf, src);
+		buf->ops->unmap(pipe, buf, src);
 	}
 
 	ret = mapping->a_ops->commit_write(file, page, offset, offset+this_len);
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 64ee07db0d5..8558226281c 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -1942,8 +1942,10 @@ xfs_alloc_fix_freelist(
 		/*
 		 * Allocate as many blocks as possible at once.
 		 */
-		if ((error = xfs_alloc_ag_vextent(&targs)))
+		if ((error = xfs_alloc_ag_vextent(&targs))) {
+			xfs_trans_brelse(tp, agflbp);
 			return error;
+		}
 		/*
 		 * Stop if we run out.  Won't happen if callers are obeying
 		 * the restrictions correctly.  Can happen for free calls
@@ -1960,6 +1962,7 @@ xfs_alloc_fix_freelist(
 				return error;
 		}
 	}
+	xfs_trans_brelse(tp, agflbp);
 	args->agbp = agbp;
 	return 0;
 }
diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c
index 81a05cfd77d..1f148762eb2 100644
--- a/fs/xfs/xfs_rename.c
+++ b/fs/xfs/xfs_rename.c
@@ -316,6 +316,18 @@ xfs_rename(
 		}
 	}
 
+	/*
+	 * If we are using project inheritance, we only allow renames
+	 * into our tree when the project IDs are the same; else the
+	 * tree quota mechanism would be circumvented.
+	 */
+	if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
+		     (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) {
+		error = XFS_ERROR(EXDEV);
+		xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
+		goto rele_return;
+	}
+
 	new_parent = (src_dp != target_dp);
 	src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR);
 
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index f0e09ca1413..36ea1b2094f 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -669,31 +669,22 @@ xfs_mntupdate(
 	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
 	int		error;
 
-	if (args->flags & XFSMNT_BARRIER)
-		mp->m_flags |= XFS_MOUNT_BARRIER;
-	else
-		mp->m_flags &= ~XFS_MOUNT_BARRIER;
-
-	if ((vfsp->vfs_flag & VFS_RDONLY) &&
-	    !(*flags & MS_RDONLY)) {
-		vfsp->vfs_flag &= ~VFS_RDONLY;
-
-		if (args->flags & XFSMNT_BARRIER)
+	if (!(*flags & MS_RDONLY)) {			/* rw/ro -> rw */
+		if (vfsp->vfs_flag & VFS_RDONLY)
+			vfsp->vfs_flag &= ~VFS_RDONLY;
+		if (args->flags & XFSMNT_BARRIER) {
+			mp->m_flags |= XFS_MOUNT_BARRIER;
 			xfs_mountfs_check_barriers(mp);
-	}
-
-	if (!(vfsp->vfs_flag & VFS_RDONLY) &&
-	    (*flags & MS_RDONLY)) {
+		} else {
+			mp->m_flags &= ~XFS_MOUNT_BARRIER;
+		}
+	} else if (!(vfsp->vfs_flag & VFS_RDONLY)) {	/* rw -> ro */
 		VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
-
 		xfs_quiesce_fs(mp);
-
-		/* Ok now write out an unmount record */
 		xfs_log_unmount_write(mp);
 		xfs_unmountfs_writesb(mp);
 		vfsp->vfs_flag |= VFS_RDONLY;
 	}
-
 	return 0;
 }
 
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index fa71b305ba5..7027ae68ee3 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -2663,7 +2663,7 @@ xfs_link(
 	 */
 	if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
 		     (tdp->i_d.di_projid != sip->i_d.di_projid))) {
-		error = XFS_ERROR(EPERM);
+		error = XFS_ERROR(EXDEV);
 		goto error_return;
 	}