diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-04-07 08:52:03 -0700 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-01 19:58:39 -0400 |
| commit | e864f39569f4092c2b2bc72c773b6e486c7e3bd9 (patch) | |
| tree | 4e2cadd87c25718956f26f11771ae9bf669ab380 | |
| parent | 6aa657c8526b8bbab6287f02dd91ac6d0c392d19 (diff) | |
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>
| -rw-r--r-- | fs/read_write.c | 6 | ||||
| -rw-r--r-- | include/uapi/linux/fs.h | 2 |
2 files changed, 7 insertions, 1 deletions
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); diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index a079d50376e1..e21fe04acc12 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -324,5 +324,7 @@ struct fscrypt_policy { /* flags for preadv2/pwritev2: */ #define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */ +#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */ +#define RWF_SYNC 0x00000004 /* per-IO O_SYNC */ #endif /* _UAPI_LINUX_FS_H */ |