Fix O_APPEND for Linux 3.15 and older kernels

When using a Linux kernel which predates the iov_iter interface the O_APPEND flag should be applied in zpl_aio_write() via the call to generic_write_checks(). The updated pos variable was incorrectly ignored resulting in the current offset being used. This issue should only realistically impact the RHEL/CentOS 7.x kernels which are based on Linux 3.10. Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes openzfs#13370 Closes openzfs#13377
andrewc12 · Sep 23, 2022 · 2dbed43 · 2dbed43
1 parent 1c0d636
commit 2dbed43
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/module/os/linux/zfs/zpl_file.c b/module/os/linux/zfs/zpl_file.c
@@ -417,6 +417,8 @@ zpl_aio_write(struct kiocb *kiocb, const struct iovec *iov,
 	if (ret)
 		return (ret);
 
+	kiocb->ki_pos = pos;
+
 	zfs_uio_t uio;
 	zfs_uio_iovec_init(&uio, iov, nr_segs, kiocb->ki_pos, UIO_USERSPACE,
 	    count, 0);