[git patches] ocfs2 fixes

From: Mark Fasheh
Date: Mon Dec 17 2007 - 14:00:42 EST

Please pull from 'upstream-linus' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2.git upstream-linus

to receive the following updates:

fs/ocfs2/alloc.c | 68 ++++++++++++++++++++++++++++++++++-----------------
fs/ocfs2/journal.c | 13 +++++++++-
2 files changed, 57 insertions(+), 24 deletions(-)

Mark Fasheh (4):
ocfs2: fix exit-while-locked bug in ocfs2_queue_orphans()
ocfs2: Don't panic when truncating an empty extent
ocfs2: Allow for debugging of transaction extends
ocfs2: Re-journal buffers after transaction extend

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index ce62c15..23c8cda 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -2389,6 +2389,18 @@ static int __ocfs2_rotate_tree_left(struct inode *inode,
goto out;
}

+ /*
+ * Caller might still want to make changes to the
+ * tree root, so re-add it to the journal here.
+ */
+ ret = ocfs2_journal_access(handle, inode,
+ path_root_bh(left_path),
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
ret = ocfs2_rotate_subtree_left(inode, handle, left_path,
right_path, subtree_root,
dealloc, &deleted);
@@ -3289,16 +3301,6 @@ static int ocfs2_insert_path(struct inode *inode,
int ret, subtree_index;
struct buffer_head *leaf_bh = path_leaf_bh(right_path);

- /*
- * Pass both paths to the journal. The majority of inserts
- * will be touching all components anyway.
- */
- ret = ocfs2_journal_access_path(inode, handle, right_path);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
-
if (left_path) {
int credits = handle->h_buffer_credits;

@@ -3323,6 +3325,16 @@ static int ocfs2_insert_path(struct inode *inode,
}
}

+ /*
+ * Pass both paths to the journal. The majority of inserts
+ * will be touching all components anyway.
+ */
+ ret = ocfs2_journal_access_path(inode, handle, right_path);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
if (insert->ins_split != SPLIT_NONE) {
/*
* We could call ocfs2_insert_at_leaf() for some types
@@ -3331,6 +3343,17 @@ static int ocfs2_insert_path(struct inode *inode,
*/
ocfs2_split_record(inode, left_path, right_path,
insert_rec, insert->ins_split);
+
+ /*
+ * Split might have modified either leaf and we don't
+ * have a guarantee that the later edge insert will
+ * dirty this for us.
+ */
+ if (left_path)
+ ret = ocfs2_journal_dirty(handle,
+ path_leaf_bh(left_path));
+ if (ret)
+ mlog_errno(ret);
} else
ocfs2_insert_at_leaf(insert_rec, path_leaf_el(right_path),
insert, inode);
@@ -3430,6 +3453,17 @@ static int ocfs2_do_insert_extent(struct inode *inode,
mlog_errno(ret);
goto out;
}
+
+ /*
+ * ocfs2_rotate_tree_right() might have extended the
+ * transaction without re-journaling our tree root.
+ */
+ ret = ocfs2_journal_access(handle, inode, di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
} else if (type->ins_appending == APPEND_TAIL
&& type->ins_contig != CONTIG_LEFT) {
ret = ocfs2_append_rec_to_path(inode, handle, insert_rec,
@@ -3941,7 +3975,7 @@ static int __ocfs2_mark_extent_written(struct inode *inode,
{
int ret = 0;
struct ocfs2_extent_list *el = path_leaf_el(path);
- struct buffer_head *eb_bh, *last_eb_bh = NULL;
+ struct buffer_head *last_eb_bh = NULL;
struct ocfs2_extent_rec *rec = &el->l_recs[split_index];
struct ocfs2_merge_ctxt ctxt;
struct ocfs2_extent_list *rightmost_el;
@@ -3960,14 +3994,6 @@ static int __ocfs2_mark_extent_written(struct inode *inode,
goto out;
}

- eb_bh = path_leaf_bh(path);
- ret = ocfs2_journal_access(handle, inode, eb_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
ctxt.c_contig_type = ocfs2_figure_merge_contig_type(inode, el,
split_index,
split_rec);
@@ -4029,8 +4055,6 @@ static int __ocfs2_mark_extent_written(struct inode *inode,
mlog_errno(ret);
}

- ocfs2_journal_dirty(handle, eb_bh);
-
out:
brelse(last_eb_bh);
return ret;
@@ -6093,8 +6117,6 @@ start:
mlog(0, "clusters_to_del = %u in this pass, tail blk=%llu\n",
clusters_to_del, (unsigned long long)path_leaf_bh(path)->b_blocknr);

- BUG_ON(clusters_to_del == 0);
-
mutex_lock(&tl_inode->i_mutex);
tl_sem = 1;
/* ocfs2_truncate_log_needs_flush guarantees us at least one
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index f9d01e2..8d81f6c 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -174,6 +174,12 @@ int ocfs2_commit_trans(struct ocfs2_super *osb,
* transaction. extend_trans will either extend the current handle by
* nblocks, or commit it and start a new one with nblocks credits.
*
+ * This might call journal_restart() which will commit dirty buffers
+ * and then restart the transaction. Before calling
+ * ocfs2_extend_trans(), any changed blocks should have been
+ * dirtied. After calling it, all blocks which need to be changed must
+ * go through another set of journal_access/journal_dirty calls.
+ *
* WARNING: This will not release any semaphores or disk locks taken
* during the transaction, so make sure they were taken *before*
* start_trans or we'll have ordering deadlocks.
@@ -193,11 +199,15 @@ int ocfs2_extend_trans(handle_t *handle, int nblocks)

mlog(0, "Trying to extend transaction by %d blocks\n", nblocks);

+#ifdef OCFS2_DEBUG_FS
+ status = 1;
+#else
status = journal_extend(handle, nblocks);
if (status < 0) {
mlog_errno(status);
goto bail;
}
+#endif

if (status > 0) {
mlog(0, "journal_extend failed, trying journal_restart\n");
@@ -1277,11 +1287,12 @@ static int ocfs2_queue_orphans(struct ocfs2_super *osb,
ocfs2_orphan_filldir);
if (status) {
mlog_errno(status);
- goto out;
+ goto out_cluster;
}

*head = priv.head;

+out_cluster:
ocfs2_meta_unlock(orphan_dir_inode, 0);
out:
mutex_unlock(&orphan_dir_inode->i_mutex);
--
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