[4/6] Ext4: fail if we try to use hole punch

Commit Message

Josef Bacik Nov. 8, 2010, 8:32 p.m. UTC

None

Patch

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 0554c48..9bff6bd 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3622,6 +3622,10 @@  long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
 	struct ext4_map_blocks map;
 	unsigned int credits, blkbits = inode->i_blkbits;
 
+	/* We only support the FALLOC_FL_KEEP_SIZE mode */
+	if (mode && (mode & FALLOC_FL_KEEP_SIZE))
+		return -EOPNOTSUPP;
+
 	/*
 	 * currently supporting (pre)allocate mode for extent-based
 	 * files _only_