If we convert and unwritten extent past the current i_size log the size update
as part of the extent manipulation transactions instead of doing an unlogged
metadata update later.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/xfs/xfs_aops.c | 11 ++++++-----
fs/xfs/xfs_iomap.c | 19 ++++++++++++++++++-
2 files changed, 24 insertions(+), 6 deletions(-)
Index: linux-2.6/fs/xfs/xfs_iomap.c
===================================================================
--- linux-2.6.orig/fs/xfs/xfs_iomap.c 2011-11-08 08:02:50.234386118 +0100
+++ linux-2.6/fs/xfs/xfs_iomap.c 2011-11-08 08:14:04.319888994 +0100
@@ -31,6 +31,7 @@
#include "xfs_ialloc_btree.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
+#include "xfs_inode_item.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_rtalloc.h"
@@ -645,6 +646,7 @@ xfs_iomap_write_unwritten(
xfs_trans_t *tp;
xfs_bmbt_irec_t imap;
xfs_bmap_free_t free_list;
+ xfs_fsize_t i_size;
uint resblks;
int committed;
int error;
@@ -705,7 +707,22 @@ xfs_iomap_write_unwritten(
if (error)
goto error_on_bmapi_transaction;
- error = xfs_bmap_finish(&(tp), &(free_list), &committed);
+ /*
+ * Log the updated inode size as we go. We have to be careful
+ * to only log it up to the actual write offset if it is
+ * halfway into a block.
+ */
+ i_size = XFS_FSB_TO_B(mp, offset_fsb + count_fsb);
+ if (i_size > offset + count)
+ i_size = offset + count;
+
+ i_size = xfs_new_eof(ip, i_size);
+ if (i_size) {
+ ip->i_d.di_size = i_size;
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+ }
+
+ error = xfs_bmap_finish(&tp, &free_list, &committed);
if (error)
goto error_on_bmapi_transaction;
Index: linux-2.6/fs/xfs/xfs_aops.c
===================================================================
--- linux-2.6.orig/fs/xfs/xfs_aops.c 2011-11-08 08:12:31.586400976 +0100
+++ linux-2.6/fs/xfs/xfs_aops.c 2011-11-08 08:14:04.319888994 +0100
@@ -183,13 +183,14 @@ xfs_end_io(
ioend->io_error = -error;
goto done;
}
+ } else {
+ /*
+ * We might have to update the on-disk file size after
+ * extending writes.
+ */
+ xfs_setfilesize(ioend);
}
- /*
- * We might have to update the on-disk file size after extending
- * writes.
- */
- xfs_setfilesize(ioend);
done:
xfs_destroy_ioend(ioend);
}
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