From e864f39569f4092c2b2bc72c773b6e486c7e3bd9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig <hch@lst.de> Date: Thu, 7 Apr 2016 08:52:03 -0700 Subject: fs: add RWF_DSYNC aand RWF_SYNC This is the per-I/O equivalent of O_DSYNC and O_SYNC, and very useful for all kinds of file servers and storage targets. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- fs/read_write.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'fs/read_write.c') diff --git a/fs/read_write.c b/fs/read_write.c index cf377cf9dfe3..3729d8d34797 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -698,12 +698,16 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter, struct kiocb kiocb; ssize_t ret; - if (flags & ~RWF_HIPRI) + if (flags & ~(RWF_HIPRI | RWF_DSYNC | RWF_SYNC)) return -EOPNOTSUPP; init_sync_kiocb(&kiocb, filp); if (flags & RWF_HIPRI) kiocb.ki_flags |= IOCB_HIPRI; + if (flags & RWF_DSYNC) + kiocb.ki_flags |= IOCB_DSYNC; + if (flags & RWF_SYNC) + kiocb.ki_flags |= (IOCB_DSYNC | IOCB_SYNC); kiocb.ki_pos = *ppos; ret = fn(&kiocb, iter); -- cgit v1.2.3-70-g09d2