From: Omar Sandoval <osan...@fb.com>
In btrfs_file_write_iter(), we treat a write as synchrononous if the
file is marked as synchronous. However, with pwritev2(), a write with
RWF_SYNC or RWF_DSYNC is also synchronous even if the file isn't by
default. Make sure we bump the sync_writers counter in that case, too,
so that we'll do the CRCs synchronously.
Signed-off-by: Omar Sandoval <osan...@fb.com>
---
fs/btrfs/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 4393b6b24e02..27223753da7b 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1882,7 +1882,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
u64 start_pos;
u64 end_pos;
ssize_t num_written = 0;
- bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
+ bool sync = iocb->ki_flags & IOCB_DSYNC;
ssize_t err;
loff_t pos;
size_t count;
--
2.17.1
