Commit e2156867 authored May 14, 2011 by Hugo Mills Committed by Chris Mason May 23, 2011

btrfs: Ensure the tree search ioctl returns the right number of records

Btrfs's tree search ioctl has a field to indicate that no more than a
given number of records should be returned. The ioctl doesn't honour
this, as the tested value is not incremented until the end of the
copy_to_sk function. This patch removes an unnecessary local variable,
and updates the num_found counter as each key is found in the tree.

Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 0956c798

fs/btrfs/ioctl.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -1279,7 +1279,6 @@ static noinline int copy_to_sk(struct btrfs_root *root,
		int nritems;
		int i;
		int slot;
		int found = 0;
		int ret = 0;

		leaf = path->nodes[0];
		@@ -1326,7 +1325,7 @@ static noinline int copy_to_sk(struct btrfs_root *root,
		item_off, item_len);
		*sk_offset += item_len;
		}
		found++;
		(*num_found)++;

		if (*num_found >= sk->nr_items)
		break;
		@@ -1345,7 +1344,6 @@ static noinline int copy_to_sk(struct btrfs_root *root,
		} else
		ret = 1;
		overflow:
		*num_found += found;
		return ret;
		}