ext4: Add ordered mode support for delalloc

[linux-2.6-omap-h63xx.git] / fs / jbd2 / commit.c

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 483183d15ed54212aaa9e81ddba9070d90eef9d5..f8b3be8732262f1642c0a1b4e19399bd048b964f 100644 (file)
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -22,6 +22,8 @@
 #include <linux/pagemap.h>
 #include <linux/jiffies.h>
 #include <linux/crc32.h>
+#include <linux/writeback.h>
+#include <linux/backing-dev.h>
 
 /*
  * Default IO end handler for temporary BJ_IO buffer_heads.
@@ -184,6 +186,27 @@ static int journal_wait_on_commit_record(struct buffer_head *bh)
        return ret;
 }
 
+/*
+ * write the filemap data using writepage() address_space_operations.
+ * We don't do block allocation here even for delalloc. We don't
+ * use writepages() because with dealyed allocation we may be doing
+ * block allocation in writepages().
+ */
+static int journal_submit_inode_data_buffers(struct address_space *mapping)
+{
+       int ret;
+       struct writeback_control wbc = {
+               .sync_mode =  WB_SYNC_ALL,
+               .nr_to_write = mapping->nrpages * 2,
+               .range_start = 0,
+               .range_end = i_size_read(mapping->host),
+               .for_writepages = 1,
+       };
+
+       ret = generic_writepages(mapping, &wbc);
+       return ret;
+}
+
 /*
  * Submit all the data buffers of inode associated with the transaction to
  * disk.
@@ -192,7 +215,7 @@ static int journal_wait_on_commit_record(struct buffer_head *bh)
  * our inode list. We use JI_COMMIT_RUNNING flag to protect inode we currently
  * operate on from being released while we write out pages.
  */
-static int journal_submit_inode_data_buffers(journal_t *journal,
+static int journal_submit_data_buffers(journal_t *journal,
                transaction_t *commit_transaction)
 {
        struct jbd2_inode *jinode;
@@ -204,8 +227,13 @@ static int journal_submit_inode_data_buffers(journal_t *journal,
                mapping = jinode->i_vfs_inode->i_mapping;
                jinode->i_flags |= JI_COMMIT_RUNNING;
                spin_unlock(&journal->j_list_lock);
-               err = filemap_fdatawrite_range(mapping, 0,
-                                       i_size_read(jinode->i_vfs_inode));
+               /*
+                * submit the inode data buffers. We use writepage
+                * instead of writepages. Because writepages can do
+                * block allocation  with delalloc. We need to write
+                * only allocated blocks here.
+                */
+               err = journal_submit_inode_data_buffers(mapping);
                if (!ret)
                        ret = err;
                spin_lock(&journal->j_list_lock);
@@ -228,7 +256,7 @@ static int journal_finish_inode_data_buffers(journal_t *journal,
        struct jbd2_inode *jinode, *next_i;
        int err, ret = 0;
 
-       /* For locking, see the comment in journal_submit_inode_data_buffers() */
+       /* For locking, see the comment in journal_submit_data_buffers() */
        spin_lock(&journal->j_list_lock);
        list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) {
                jinode->i_flags |= JI_COMMIT_RUNNING;
@@ -431,7 +459,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
         * Now start flushing things to disk, in the order they appear
         * on the transaction lists.  Data blocks go first.
         */
-       err = journal_submit_inode_data_buffers(journal, commit_transaction);
+       err = journal_submit_data_buffers(journal, commit_transaction);
        if (err)
                jbd2_journal_abort(journal, err);