Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: fix ioctl arg size (userland incompatible change!)
  Btrfs: Clear the device->running_pending flag before bailing on congestion

3 files changed, 11 insertions, 7 deletions

diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 78049ea208db..b320b103fa13 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -22,13 +22,20 @@
 
 #define BTRFS_IOCTL_MAGIC 0x94
 #define BTRFS_VOL_NAME_MAX 255
-#define BTRFS_PATH_NAME_MAX 3072
+#define BTRFS_PATH_NAME_MAX 4087
 
+/* this should be 4k */
 struct btrfs_ioctl_vol_args {
         __s64 fd;
         char name[BTRFS_PATH_NAME_MAX + 1];
 };
 
+struct btrfs_ioctl_clone_range_args {
+  __s64 src_fd;
+  __u64 src_offset, src_length;
+  __u64 dest_offset;
+};
+
 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
                                    struct btrfs_ioctl_vol_args)
 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
@@ -52,11 +59,6 @@ struct btrfs_ioctl_vol_args {
                                    struct btrfs_ioctl_vol_args)
 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
                                    struct btrfs_ioctl_vol_args)
-struct btrfs_ioctl_clone_range_args {
-  __s64 src_fd;
-  __u64 src_offset, src_length;
-  __u64 dest_offset;
-};
 
 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
                                   struct btrfs_ioctl_clone_range_args)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 7256cf242eb0..db9fb3bc1e33 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -582,7 +582,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 {
         struct btrfs_ioctl_vol_args *vol;
         struct btrfs_fs_devices *fs_devices;
-        int ret = 0;
+        int ret = -ENOTTY;
         int len;
 
         if (!capable(CAP_SYS_ADMIN))
@@ -594,6 +594,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
                 goto out;
         }
         len = strnlen(vol->name, BTRFS_PATH_NAME_MAX);
+
         switch (cmd) {
         case BTRFS_IOC_SCAN_DEV:
                 ret = btrfs_scan_one_device(vol->name, FMODE_READ,
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b187b537888e..3451e1cca2b5 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -220,6 +220,7 @@ loop:
                                 tail->bi_next = old_head;
                         else
                                 device->pending_bio_tail = tail;
+                        device->running_pending = 0;
 
                         spin_unlock(&device->io_lock);
                         btrfs_requeue_work(&device->work);