Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Bob Peterson <rpeterso@xxxxxxxxxx>
---
fs/xfs/xfs_aops.c | 71 +++++++++++++++----------------------------------------
1 file changed, 19 insertions(+), 52 deletions(-)
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 2ac9f7e..80714eb 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1143,6 +1143,8 @@ __xfs_get_blocks(
ssize_t size;
int new = 0;
+ BUG_ON(create && !direct);
+
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
@@ -1150,22 +1152,14 @@ __xfs_get_blocks(
ASSERT(bh_result->b_size >= (1 << inode->i_blkbits));
size = bh_result->b_size;
- if (!create && direct && offset >= i_size_read(inode))
+ if (!create && offset >= i_size_read(inode))
return 0;
/*
* Direct I/O is usually done on preallocated files, so try getting
- * a block mapping without an exclusive lock first. For buffered
- * writes we already have the exclusive iolock anyway, so avoiding
- * a lock roundtrip here by taking the ilock exclusive from the
- * beginning is a useful micro optimization.
+ * a block mapping without an exclusive lock first.
*/
- if (create && !direct) {
- lockmode = XFS_ILOCK_EXCL;
- xfs_ilock(ip, lockmode);
- } else {
- lockmode = xfs_ilock_data_map_shared(ip);
- }
+ lockmode = xfs_ilock_data_map_shared(ip);
ASSERT(offset <= mp->m_super->s_maxbytes);
if (offset + size > mp->m_super->s_maxbytes)
@@ -1184,37 +1178,19 @@ __xfs_get_blocks(
(imap.br_startblock == HOLESTARTBLOCK ||
imap.br_startblock == DELAYSTARTBLOCK) ||
(IS_DAX(inode) && ISUNWRITTEN(&imap)))) {
- if (direct || xfs_get_extsz_hint(ip)) {
- /*
- * xfs_iomap_write_direct() expects the shared lock. It
- * is unlocked on return.
- */
- if (lockmode == XFS_ILOCK_EXCL)
- xfs_ilock_demote(ip, lockmode);
-
- error = xfs_iomap_write_direct(ip, offset, size,
- &imap, nimaps);
- if (error)
- return error;
- new = 1;
+ /*
+ * xfs_iomap_write_direct() expects the shared lock. It
+ * is unlocked on return.
+ */
+ if (lockmode == XFS_ILOCK_EXCL)
+ xfs_ilock_demote(ip, lockmode);
- } else {
- /*
- * Delalloc reservations do not require a transaction,
- * we can go on without dropping the lock here. If we
- * are allocating a new delalloc block, make sure that
- * we set the new flag so that we mark the buffer new so
- * that we know that it is newly allocated if the write
- * fails.
- */
- if (nimaps && imap.br_startblock == HOLESTARTBLOCK)
- new = 1;
- error = xfs_iomap_write_delay(ip, offset, size, &imap);
- if (error)
- goto out_unlock;
+ error = xfs_iomap_write_direct(ip, offset, size,
+ &imap, nimaps);
+ if (error)
+ return error;
+ new = 1;
- xfs_iunlock(ip, lockmode);
- }
trace_xfs_get_blocks_alloc(ip, offset, size,
ISUNWRITTEN(&imap) ? XFS_IO_UNWRITTEN
: XFS_IO_DELALLOC, &imap);
@@ -1235,9 +1211,7 @@ __xfs_get_blocks(
}
/* trim mapping down to size requested */
- if (direct || size > (1 << inode->i_blkbits))
- xfs_map_trim_size(inode, iblock, bh_result,
- &imap, offset, size);
+ xfs_map_trim_size(inode, iblock, bh_result, &imap, offset, size);
/*
* For unwritten extents do not report a disk address in the buffered
@@ -1250,7 +1224,7 @@ __xfs_get_blocks(
if (ISUNWRITTEN(&imap))
set_buffer_unwritten(bh_result);
/* direct IO needs special help */
- if (create && direct) {
+ if (create) {
if (dax_fault)
ASSERT(!ISUNWRITTEN(&imap));
else
@@ -1279,14 +1253,7 @@ __xfs_get_blocks(
(new || ISUNWRITTEN(&imap))))
set_buffer_new(bh_result);
- if (imap.br_startblock == DELAYSTARTBLOCK) {
- BUG_ON(direct);
- if (create) {
- set_buffer_uptodate(bh_result);
- set_buffer_mapped(bh_result);
- set_buffer_delay(bh_result);
- }
- }
+ BUG_ON(direct && imap.br_startblock == DELAYSTARTBLOCK);
return 0;
--
2.1.4
_______________________________________________
xfs mailing list
xfs@xxxxxxxxxxx
http://oss.sgi.com/mailman/listinfo/xfs
