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authorChristoph Hellwig <hch@lst.de>2019-09-19 15:32:45 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2019-09-19 15:32:45 -0700
commit838c4f3d7515efe9d0e32c846fb5d102b6d8a29d (patch)
treecd50fb73997130df5bd87700861aae7663702ed4 /fs/xfs/xfs_file.c
parent6fe7b9901400152238e1b76198747f6716c78aad (diff)
downloadlinux-838c4f3d7515efe9d0e32c846fb5d102b6d8a29d.tar.bz2
iomap: move the iomap_dio_rw ->end_io callback into a structure
Add a new iomap_dio_ops structure that for now just contains the end_io handler. This avoid storing the function pointer in a mutable structure, which is a possible exploit vector for kernel code execution, and prepares for adding a submit_io handler that btrfs needs. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r--fs/xfs/xfs_file.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 74411296f6b5..21bd3d575aaa 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -442,6 +442,10 @@ out:
return error;
}
+static const struct iomap_dio_ops xfs_dio_write_ops = {
+ .end_io = xfs_dio_write_end_io,
+};
+
/*
* xfs_file_dio_aio_write - handle direct IO writes
*
@@ -542,7 +546,7 @@ xfs_file_dio_aio_write(
}
trace_xfs_file_direct_write(ip, count, iocb->ki_pos);
- ret = iomap_dio_rw(iocb, from, &xfs_iomap_ops, xfs_dio_write_end_io);
+ ret = iomap_dio_rw(iocb, from, &xfs_iomap_ops, &xfs_dio_write_ops);
/*
* If unaligned, this is the only IO in-flight. If it has not yet