btrfs: return btrfs error code for dev excl ops err

now threads can return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
as defined in btrfs.h for the dev excl operation error in
the FS, which means with this kernel would stop logging
(almost an user error) into the /var/log/messages

v2: accepts Josef' comment

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 4 insertions, 8 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ddb4bc1252ad..1a5b9462dd9a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1394,9 +1394,8 @@ static noinline int btrfs_ioctl_resize(struct file *file,
 
         if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
                         1)) {
-                pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
                 mnt_drop_write_file(file);
-                return -EINVAL;
+                return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
         }
 
         mutex_lock(&root->fs_info->volume_mutex);
@@ -2379,8 +2378,7 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)
 
         if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,
                         1)) {
-                pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
-                return -EINVAL;
+                return BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
         }
 
         mutex_lock(&root->fs_info->volume_mutex);
@@ -3673,8 +3671,7 @@ static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg)
                 if (atomic_xchg(
                         &root->fs_info->mutually_exclusive_operation_running,
                         1)) {
-                        pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
-                        ret = -EINPROGRESS;
+                        ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
                 } else {
                         ret = btrfs_dev_replace_start(root, p);
                         atomic_set(
@@ -3918,8 +3915,7 @@ again:
         } else {
                 /* this is (1) */
                 mutex_unlock(&fs_info->balance_mutex);
-                pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n");
-                ret = -EINVAL;
+                ret = BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS;
                 goto out;
         }