ChangeSet 1.2231.1.243, 2005/03/28 20:23:53-08:00, [EMAIL PROTECTED]
[PATCH] ext3 writepages support for writeback mode
Add writepages support for ext3 writeback mode.
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
fs/ext3/inode.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
fs/mpage.c | 12 +++++++++++-
include/linux/mpage.h | 3 +++
3 files changed, 60 insertions(+), 1 deletion(-)
diff -Nru a/fs/ext3/inode.c b/fs/ext3/inode.c
--- a/fs/ext3/inode.c 2005-03-28 22:02:23 -08:00
+++ b/fs/ext3/inode.c 2005-03-28 22:02:23 -08:00
@@ -858,6 +858,12 @@
return ret;
}
+static int ext3_writepages_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh, int create)
+{
+ return ext3_direct_io_get_blocks(inode, iblock, 1, bh, create);
+}
+
/*
* `handle' can be NULL if create is zero
*/
@@ -1323,6 +1329,45 @@
return ret;
}
+static int
+ext3_writeback_writepage_helper(struct page *page,
+ struct writeback_control *wbc)
+{
+ return block_write_full_page(page, ext3_get_block, wbc);
+}
+
+static int
+ext3_writeback_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = mapping->host;
+ handle_t *handle = NULL;
+ int err, ret = 0;
+
+ if (!mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
+ return ret;
+
+ handle = ext3_journal_start(inode, ext3_writepage_trans_blocks(inode));
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ return ret;
+ }
+
+ ret = __mpage_writepages(mapping, wbc, ext3_writepages_get_block,
+ ext3_writeback_writepage_helper);
+
+ /*
+ * Need to reaquire the handle since ext3_writepages_get_block()
+ * can restart the handle
+ */
+ handle = journal_current_handle();
+
+ err = ext3_journal_stop(handle);
+ if (!ret)
+ ret = err;
+ return ret;
+}
+
static int ext3_writeback_writepage(struct page *page,
struct writeback_control *wbc)
{
@@ -1554,6 +1599,7 @@
.readpage = ext3_readpage,
.readpages = ext3_readpages,
.writepage = ext3_writeback_writepage,
+ .writepages = ext3_writeback_writepages,
.sync_page = block_sync_page,
.prepare_write = ext3_prepare_write,
.commit_write = ext3_writeback_commit_write,
diff -Nru a/fs/mpage.c b/fs/mpage.c
--- a/fs/mpage.c 2005-03-28 22:02:23 -08:00
+++ b/fs/mpage.c 2005-03-28 22:02:23 -08:00
@@ -626,6 +626,15 @@
mpage_writepages(struct address_space *mapping,
struct writeback_control *wbc, get_block_t get_block)
{
+ return __mpage_writepages(mapping, wbc, get_block,
+ mapping->a_ops->writepage);
+}
+
+int
+__mpage_writepages(struct address_space *mapping,
+ struct writeback_control *wbc, get_block_t get_block,
+ writepage_t writepage_fn)
+{
struct backing_dev_info *bdi = mapping->backing_dev_info;
struct bio *bio = NULL;
sector_t last_block_in_bio = 0;
@@ -715,7 +724,7 @@
} else {
bio = __mpage_writepage(bio, page, get_block,
&last_block_in_bio, &ret, wbc,
-
page->mapping->a_ops->writepage);
+ writepage_fn);
}
if (ret || (--(wbc->nr_to_write) <= 0))
done = 1;
@@ -743,6 +752,7 @@
return ret;
}
EXPORT_SYMBOL(mpage_writepages);
+EXPORT_SYMBOL(__mpage_writepages);
int mpage_writepage(struct page *page, get_block_t get_block,
struct writeback_control *wbc)
diff -Nru a/include/linux/mpage.h b/include/linux/mpage.h
--- a/include/linux/mpage.h 2005-03-28 22:02:23 -08:00
+++ b/include/linux/mpage.h 2005-03-28 22:02:23 -08:00
@@ -20,6 +20,9 @@
struct writeback_control *wbc, get_block_t get_block);
int mpage_writepage(struct page *page, get_block_t *get_block,
struct writeback_control *wbc);
+int __mpage_writepages(struct address_space *mapping,
+ struct writeback_control *wbc, get_block_t get_block,
+ writepage_t writepage);
static inline int
generic_writepages(struct address_space *mapping, struct writeback_control
*wbc)
-
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