fs: prevent doing FALLOC_FL_ZERO_RANGE on append only file

[linux-block.git] / fs / open.c

diff --git a/fs/open.c b/fs/open.c
index 631aea815def32946433b8aebed9a312d0fc872c..3a83253d33731e65436ea5965f1645c658789aac 100644 (file)
--- a/fs/open.c
+++ b/fs/open.c
@@ -254,11 +254,9 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
                return -EBADF;
 
        /*
-        * It's not possible to punch hole or perform collapse range
-        * on append only file
+        * We can only allow pure fallocate on append only files
         */
-       if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE)
-           && IS_APPEND(inode))
+       if ((mode & ~FALLOC_FL_KEEP_SIZE) && IS_APPEND(inode))
                return -EPERM;
 
        if (IS_IMMUTABLE(inode))