ocfs2: Make high level btree extend code generic
Factor out the non-inode specifics of ocfs2_do_extend_allocation() into a more generic
function, ocfs2_do_cluster_allocation(). ocfs2_do_extend_allocation calls
ocfs2_do_cluster_allocation() now, but the latter can be used for other
btree types as well.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index f567cc5..7bb4fde 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -488,7 +488,7 @@
}
/*
- * extend allocation only here.
+ * extend file allocation only here.
* we'll update all the disk stuff, and oip->alloc_size
*
* expect stuff to be locked, a transaction started and enough data /
@@ -497,107 +497,25 @@
* Will return -EAGAIN, and a reason if a restart is needed.
* If passed in, *reason will always be set, even in error.
*/
-int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
- struct inode *inode,
- u32 *logical_offset,
- u32 clusters_to_add,
- int mark_unwritten,
- struct buffer_head *fe_bh,
- handle_t *handle,
- struct ocfs2_alloc_context *data_ac,
- struct ocfs2_alloc_context *meta_ac,
- enum ocfs2_alloc_restarted *reason_ret)
+int ocfs2_add_inode_data(struct ocfs2_super *osb,
+ struct inode *inode,
+ u32 *logical_offset,
+ u32 clusters_to_add,
+ int mark_unwritten,
+ struct buffer_head *fe_bh,
+ handle_t *handle,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_alloc_context *meta_ac,
+ enum ocfs2_alloc_restarted *reason_ret)
{
- int status = 0;
- int free_extents;
struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
- enum ocfs2_alloc_restarted reason = RESTART_NONE;
- u32 bit_off, num_bits;
- u64 block;
- u8 flags = 0;
+ struct ocfs2_extent_list *el = &fe->id2.i_list;
- BUG_ON(!clusters_to_add);
-
- if (mark_unwritten)
- flags = OCFS2_EXT_UNWRITTEN;
-
- free_extents = ocfs2_num_free_extents(osb, inode, fe_bh,
- OCFS2_DINODE_EXTENT);
- if (free_extents < 0) {
- status = free_extents;
- mlog_errno(status);
- goto leave;
- }
-
- /* there are two cases which could cause us to EAGAIN in the
- * we-need-more-metadata case:
- * 1) we haven't reserved *any*
- * 2) we are so fragmented, we've needed to add metadata too
- * many times. */
- if (!free_extents && !meta_ac) {
- mlog(0, "we haven't reserved any metadata!\n");
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- } else if ((!free_extents)
- && (ocfs2_alloc_context_bits_left(meta_ac)
- < ocfs2_extend_meta_needed(&fe->id2.i_list))) {
- mlog(0, "filesystem is really fragmented...\n");
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- }
-
- status = __ocfs2_claim_clusters(osb, handle, data_ac, 1,
- clusters_to_add, &bit_off, &num_bits);
- if (status < 0) {
- if (status != -ENOSPC)
- mlog_errno(status);
- goto leave;
- }
-
- BUG_ON(num_bits > clusters_to_add);
-
- /* reserve our write early -- insert_extent may update the inode */
- status = ocfs2_journal_access(handle, inode, fe_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
- mlog(0, "Allocating %u clusters at block %u for inode %llu\n",
- num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
- status = ocfs2_insert_extent(osb, handle, inode, fe_bh,
- *logical_offset, block, num_bits,
- flags, meta_ac, OCFS2_DINODE_EXTENT);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- status = ocfs2_journal_dirty(handle, fe_bh);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- clusters_to_add -= num_bits;
- *logical_offset += num_bits;
-
- if (clusters_to_add) {
- mlog(0, "need to alloc once more, clusters = %u, wanted = "
- "%u\n", fe->i_clusters, clusters_to_add);
- status = -EAGAIN;
- reason = RESTART_TRANS;
- }
-
-leave:
- mlog_exit(status);
- if (reason_ret)
- *reason_ret = reason;
- return status;
+ return ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
+ clusters_to_add, mark_unwritten,
+ fe_bh, el, handle,
+ data_ac, meta_ac, reason_ret,
+ OCFS2_DINODE_EXTENT);
}
static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
@@ -676,16 +594,16 @@
prev_clusters = OCFS2_I(inode)->ip_clusters;
- status = ocfs2_do_extend_allocation(osb,
- inode,
- &logical_start,
- clusters_to_add,
- mark_unwritten,
- bh,
- handle,
- data_ac,
- meta_ac,
- &why);
+ status = ocfs2_add_inode_data(osb,
+ inode,
+ &logical_start,
+ clusters_to_add,
+ mark_unwritten,
+ bh,
+ handle,
+ data_ac,
+ meta_ac,
+ &why);
if ((status < 0) && (status != -EAGAIN)) {
if (status != -ENOSPC)
mlog_errno(status);