1 files changed, 15 insertions, 1 deletions

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index f7fe4770f0e5..69b59bf75882 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -686,7 +686,7 @@ static int send_cmd(struct send_ctx *sctx)
         hdr->len = cpu_to_le32(sctx->send_size - sizeof(*hdr));
         hdr->crc = 0;
 
-        crc = crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size);
+        crc = btrfs_crc32c(0, (unsigned char *)sctx->send_buf, sctx->send_size);
         hdr->crc = cpu_to_le32(crc);
 
         ret = write_buf(sctx->send_filp, sctx->send_buf, sctx->send_size,
@@ -6929,9 +6929,23 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
         if (ret)
                 goto out;
 
+        mutex_lock(&fs_info->balance_mutex);
+        if (test_bit(BTRFS_FS_BALANCE_RUNNING, &fs_info->flags)) {
+                mutex_unlock(&fs_info->balance_mutex);
+                btrfs_warn_rl(fs_info,
+                "cannot run send because a balance operation is in progress");
+                ret = -EAGAIN;
+                goto out;
+        }
+        fs_info->send_in_progress++;
+        mutex_unlock(&fs_info->balance_mutex);
+
         current->journal_info = BTRFS_SEND_TRANS_STUB;
         ret = send_subvol(sctx);
         current->journal_info = NULL;
+        mutex_lock(&fs_info->balance_mutex);
+        fs_info->send_in_progress--;
+        mutex_unlock(&fs_info->balance_mutex);
         if (ret < 0)
                 goto out;