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Patch in this message | | | From | "Levin, Alexander (Sasha Levin)" <> | Subject | [PATCH review for 4.4 18/24] staging: lustre: llite: don't invoke direct_IO for the EOF case | Date | Sat, 7 Oct 2017 22:37:48 +0000 |
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From: Yang Sheng <yang.sheng@intel.com>
[ Upstream commit 77759771fb95420d23876cb104ab65c022613325 ]
The function generic_file_read_iter() does not check EOF before invoke direct_IO callback. So we have to check it ourselves.
Signed-off-by: Yang Sheng <yang.sheng@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8969 Reviewed-on: https://review.whamcloud.com/24552 Reviewed-by: Bob Glossman <bob.glossman@intel.com> Reviewed-by: Bobi Jam <bobijam@hotmail.com> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- drivers/staging/lustre/lustre/llite/rw26.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c index 3da4c01e2159..adeefb31cbad 100644 --- a/drivers/staging/lustre/lustre/llite/rw26.c +++ b/drivers/staging/lustre/lustre/llite/rw26.c @@ -376,6 +376,10 @@ static ssize_t ll_direct_IO_26(struct kiocb *iocb, struct iov_iter *iter, if (!lli->lli_has_smd) return -EBADF; + /* Check EOF by ourselves */ + if (iov_iter_rw(iter) == READ && file_offset >= i_size_read(inode)) + return 0; + /* FIXME: io smaller than PAGE_SIZE is broken on ia64 ??? */ if ((file_offset & ~CFS_PAGE_MASK) || (count & ~CFS_PAGE_MASK)) return -EINVAL; -- 2.11.0
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