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authorAl Viro <viro@zeniv.linux.org.uk>2015-04-11 22:29:51 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2015-04-11 22:29:51 -0400
commitdfea934575164497a9e36074ebce606a1a278ed9 (patch)
treeb39ec564ae5a84956af80ae43de24c4f91720519 /fs/ocfs2/file.c
parent165f1a6e300d5a1ffb57cf9a9c8762de731228f2 (diff)
parent64b4e2526d1cf6e6a4db6213d6e2b6e6ab59479a (diff)
Merge branch 'for-linus' into for-next
Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r--fs/ocfs2/file.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 1c11314946cb..8096fb6c081b 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2391,7 +2391,6 @@ relock:
/*
* for completing the rest of the request.
*/
- *ppos += written;
count -= written;
written_buffered = generic_perform_write(file, from, *ppos);
/*
@@ -2406,7 +2405,6 @@ relock:
goto out_dio;
}
- iocb->ki_pos = *ppos + written_buffered;
/* We need to ensure that the page cache pages are written to
* disk and invalidated to preserve the expected O_DIRECT
* semantics.
@@ -2415,6 +2413,7 @@ relock:
ret = filemap_write_and_wait_range(file->f_mapping, *ppos,
endbyte);
if (ret == 0) {
+ iocb->ki_pos = *ppos + written_buffered;
written += written_buffered;
invalidate_mapping_pages(mapping,
*ppos >> PAGE_CACHE_SHIFT,
@@ -2437,10 +2436,14 @@ out_dio:
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
+ if (unlikely(written <= 0))
+ goto no_sync;
+
if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) ||
((file->f_flags & O_DIRECT) && !direct_io)) {
- ret = filemap_fdatawrite_range(file->f_mapping, *ppos,
- *ppos + count - 1);
+ ret = filemap_fdatawrite_range(file->f_mapping,
+ iocb->ki_pos - written,
+ iocb->ki_pos - 1);
if (ret < 0)
written = ret;
@@ -2451,10 +2454,12 @@ out_dio:
}
if (!ret)
- ret = filemap_fdatawait_range(file->f_mapping, *ppos,
- *ppos + count - 1);
+ ret = filemap_fdatawait_range(file->f_mapping,
+ iocb->ki_pos - written,
+ iocb->ki_pos - 1);
}
+no_sync:
/*
* deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
* function pointer which is called when o_direct io completes so that