diff options
| -rw-r--r-- | fs/xfs/xfs_file.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 412b1d71b52b..44be10490342 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -822,6 +822,20 @@ xfs_file_write_iter( if (IS_DAX(inode)) return xfs_file_dax_write(iocb, from); + if (iocb->ki_flags & IOCB_ATOMIC) { + /* + * Currently only atomic writing of a single FS block is + * supported. It would be possible to atomic write smaller than + * a FS block, but there is no requirement to support this. + * Note that iomap also does not support this yet. + */ + if (ocount != ip->i_mount->m_sb.sb_blocksize) + return -EINVAL; + ret = generic_atomic_write_valid(iocb, from); + if (ret) + return ret; + } + if (iocb->ki_flags & IOCB_DIRECT) { /* * Allow a directio write to fall back to a buffered |