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ocfs2: Re-journal buffers after transaction extend 

ocfs2_extend_trans() might call journal_restart() which will commit dirty
buffers and then restart the transaction. This means that any buffers which
still need changes should be passed to journal_access() again. Some paths
during extend weren't doing this right.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2007-12-03 16:43:01 -08:00
parent 0879c584ff
commit e8aed3450c
2 changed files with 51 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
fs/ocfs2/alloc.c
View File

@ -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;

6
fs/ocfs2/journal.c
View File

@ -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.