Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [BRIDGE]: allow full size vlan packets

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index c8bce82ddcacdf22e6a7190c204faf154821a619..89b1d196ca80fe3a0dfb4672fe0a36396e14ac32 100644 (file)
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -246,6 +246,7 @@ class/
 devices/
 firmware/
 net/
+fs/
 
 devices/ contains a filesystem representation of the device tree. It maps
 directly to the internal kernel device tree, which is a hierarchy of
@@ -264,6 +265,10 @@ drivers/ contains a directory for each device driver that is loaded
 for devices on that particular bus (this assumes that drivers do not
 span multiple bus types).
 
+fs/ contains a directory for some filesystems.  Currently each
+filesystem wanting to export attributes must create its own hierarchy
+below fs/ (see ./fuse.txt for an example).
+
 
 More information can driver-model specific features can be found in
 Documentation/driver-model/. 

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index cc750c68fe709b4d552bead603074564ecbb0c9b..104a62dadb94c9b8fa489963b51a97bc69b3dba2 100644 (file)
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -128,14 +128,24 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)
        }
 }
 
-void fuse_remove_background(struct fuse_conn *fc, struct fuse_req *req)
+/*
+ * Called with sbput_sem held for read (request_end) or write
+ * (fuse_put_super).  By the time fuse_put_super() is finished, all
+ * inodes belonging to background requests must be released, so the
+ * iputs have to be done within the locked region.
+ */
+void fuse_release_background(struct fuse_conn *fc, struct fuse_req *req)
 {
-       list_del_init(&req->bg_entry);
+       iput(req->inode);
+       iput(req->inode2);
+       spin_lock(&fc->lock);
+       list_del(&req->bg_entry);
        if (fc->num_background == FUSE_MAX_BACKGROUND) {
                fc->blocked = 0;
                wake_up_all(&fc->blocked_waitq);
        }
        fc->num_background--;
+       spin_unlock(&fc->lock);
 }
 
 /*
@@ -165,27 +175,22 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
                wake_up(&req->waitq);
                fuse_put_request(fc, req);
        } else {
-               struct inode *inode = req->inode;
-               struct inode *inode2 = req->inode2;
-               struct file *file = req->file;
                void (*end) (struct fuse_conn *, struct fuse_req *) = req->end;
                req->end = NULL;
-               req->inode = NULL;
-               req->inode2 = NULL;
-               req->file = NULL;
-               if (!list_empty(&req->bg_entry))
-                       fuse_remove_background(fc, req);
                spin_unlock(&fc->lock);
+               down_read(&fc->sbput_sem);
+               if (fc->mounted)
+                       fuse_release_background(fc, req);
+               up_read(&fc->sbput_sem);
+
+               /* fput must go outside sbput_sem, otherwise it can deadlock */
+               if (req->file)
+                       fput(req->file);
 
                if (end)
                        end(fc, req);
                else
                        fuse_put_request(fc, req);
-
-               if (file)
-                       fput(file);
-               iput(inode);
-               iput(inode2);
        }
 }
 

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 59661c481d9d4fecb6286d2811cbebe649f3a992..0474202cb5dc09d8b0bd9c75c47d7e01a87b700a 100644 (file)
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -258,9 +258,15 @@ struct fuse_conn {
        /** waitq for blocked connection */
        wait_queue_head_t blocked_waitq;
 
+       /** RW semaphore for exclusion with fuse_put_super() */
+       struct rw_semaphore sbput_sem;
+
        /** The next unique request id */
        u64 reqctr;
 
+       /** Mount is active */
+       unsigned mounted;
+
        /** Connection established, cleared on umount, connection
            abort and device release */
        unsigned connected;
@@ -471,11 +477,11 @@ void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req);
 void request_send_background(struct fuse_conn *fc, struct fuse_req *req);
 
 /**
- * Remove request from the the background list
+ * Release inodes and file associated with background request
  */
-void fuse_remove_background(struct fuse_conn *fc, struct fuse_req *req);
+void fuse_release_background(struct fuse_conn *fc, struct fuse_req *req);
 
-/** Abort all requests */
+/* Abort all requests */
 void fuse_abort_conn(struct fuse_conn *fc);
 
 /**

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 43a6fc0db8a7ec981f73cd65a8c128a3fa68118a..7627022446b27b0cd067006df2b818dc1b5d9bf5 100644 (file)
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -204,26 +204,17 @@ static void fuse_put_super(struct super_block *sb)
 {
        struct fuse_conn *fc = get_fuse_conn_super(sb);
 
+       down_write(&fc->sbput_sem);
+       while (!list_empty(&fc->background))
+               fuse_release_background(fc,
+                                       list_entry(fc->background.next,
+                                                  struct fuse_req, bg_entry));
+
        spin_lock(&fc->lock);
+       fc->mounted = 0;
        fc->connected = 0;
-       while (!list_empty(&fc->background)) {
-               struct fuse_req *req = list_entry(fc->background.next,
-                                                 struct fuse_req, bg_entry);
-               struct inode *inode = req->inode;
-               struct inode *inode2 = req->inode2;
-
-               /* File would hold a reference to vfsmount */
-               BUG_ON(req->file);
-               req->inode = NULL;
-               req->inode2 = NULL;
-               fuse_remove_background(fc, req);
-
-               spin_unlock(&fc->lock);
-               iput(inode);
-               iput(inode2);
-               spin_lock(&fc->lock);
-       }
        spin_unlock(&fc->lock);
+       up_write(&fc->sbput_sem);
        /* Flush all readers on this fs */
        kill_fasync(&fc->fasync, SIGIO, POLL_IN);
        wake_up_all(&fc->waitq);
@@ -395,6 +386,7 @@ static struct fuse_conn *new_conn(void)
                INIT_LIST_HEAD(&fc->processing);
                INIT_LIST_HEAD(&fc->io);
                INIT_LIST_HEAD(&fc->background);
+               init_rwsem(&fc->sbput_sem);
                kobj_set_kset_s(fc, connections_subsys);
                kobject_init(&fc->kobj);
                atomic_set(&fc->num_waiting, 0);
@@ -508,11 +500,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
        if (file->f_op != &fuse_dev_operations)
                return -EINVAL;
 
-       /* Setting file->private_data can't race with other mount()
-          instances, since BKL is held for ->get_sb() */
-       if (file->private_data)
-               return -EINVAL;
-
        fc = new_conn();
        if (!fc)
                return -ENOMEM;
@@ -548,7 +535,14 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
        if (err)
                goto err_free_req;
 
+       /* Setting file->private_data can't race with other mount()
+          instances, since BKL is held for ->get_sb() */
+       err = -EINVAL;
+       if (file->private_data)
+               goto err_kobject_del;
+
        sb->s_root = root_dentry;
+       fc->mounted = 1;
        fc->connected = 1;
        kobject_get(&fc->kobj);
        file->private_data = fc;
@@ -563,6 +557,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 
        return 0;
 
+ err_kobject_del:
+       kobject_del(&fc->kobj);
  err_free_req:
        fuse_request_free(init_req);
  err_put_root: