GFS2: move toward a generic multi-block allocator
This patch is a revision of the one I previously posted.
I tried to integrate all the suggestions Steve gave.
The purpose of the patch is to change function gfs2_alloc_block
(allocate either a dinode block or an extent of data blocks)
to a more generic gfs2_alloc_blocks function that can
allocate both a dinode _and_ an extent of data blocks in the
same call. This will ultimately help us create a multi-block
reservation scheme to reduce file fragmentation.
This patch moves more toward a generic multi-block allocator that
takes a pointer to the number of data blocks to allocate, plus whether
or not to allocate a dinode. In theory, it could be called to allocate
(1) a single dinode block, (2) a group of one or more data blocks, or
(3) a dinode plus several data blocks.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index de2668f..3ab192b 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -389,6 +389,7 @@
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
int error;
+ int dblocks = 0;
if (gfs2_alloc_get(dip) == NULL)
return -ENOMEM;
@@ -402,7 +403,7 @@
if (error)
goto out_ipreserv;
- error = gfs2_alloc_block(dip, no_addr, NULL, 1, generation);
+ error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation);
gfs2_trans_end(sdp);