The patch titled
Subject: fat: enable .splice_write to support splice on O_DIRECT file
has been added to the -mm tree. Its filename is
fat-enable-splice_write-to-support-splice-on-o_direct-file.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fat-enable-splice_write-to-support-splice-on-o_direct-file.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fat-enable-splice_write-to-support-splice-on-o_direct-file.patch
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------------------------------------------------------
From: Hou Tao <houtao1@xxxxxxxxxx>
Subject: fat: enable .splice_write to support splice on O_DIRECT file
Now splice() on O_DIRECT-opened fat file will return -EFAULT, that is
because the default .splice_write, namely default_file_splice_write(),
will construct an ITER_KVEC iov_iter and dio_refill_pages() in dio path
can not handle it.
Fix it by implementing .splice_write through iter_file_splice_write().
Spotted by xfs-tests generic/091.
Link: http://lkml.kernel.org/r/20190210094754.56355-1-houtao1@xxxxxxxxxx
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/file.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/fat/file.c~fat-enable-splice_write-to-support-splice-on-o_direct-file
+++ a/fs/fat/file.c
@@ -214,6 +214,7 @@ const struct file_operations fat_file_op
#endif
.fsync = fat_file_fsync,
.splice_read = generic_file_splice_read,
+ .splice_write = iter_file_splice_write,
.fallocate = fat_fallocate,
};
_
Patches currently in -mm which might be from houtao1@xxxxxxxxxx are
fat-enable-splice_write-to-support-splice-on-o_direct-file.patch
