1 files changed, 7 insertions, 0 deletions

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index f9f07c4fa517..4598345ab87d 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2467,6 +2467,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
 {
         struct fuse_file *ff = file->private_data;
         struct inode *inode = file->f_inode;
+        struct fuse_inode *fi = get_fuse_inode(inode);
         struct fuse_conn *fc = ff->fc;
         struct fuse_req *req;
         struct fuse_fallocate_in inarg = {
@@ -2495,6 +2496,9 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
                 }
         }
 
+        if (!(mode & FALLOC_FL_KEEP_SIZE))
+                set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
+
         req = fuse_get_req_nopages(fc);
         if (IS_ERR(req)) {
                 err = PTR_ERR(req);
@@ -2527,6 +2531,9 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
         fuse_invalidate_attr(inode);
 
 out:
+        if (!(mode & FALLOC_FL_KEEP_SIZE))
+                clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
+
         if (lock_inode)
                 mutex_unlock(&inode->i_mutex);