LU-12586 lov: one more fix to write_intent end for trunc

This patch fixes another case where the truncate write intent
extent is set incorrectly.  This may cause errors when truncating
PFL files to exactly the boundary between two extents.

Fixes: c32c7401426d ("LU-12586 lov: Correct write_intent end for trunc")
Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Change-Id: I40f14a48c53bfd1e6442e4414ee30f9eb159fc02
Reviewed-on: https://review.whamcloud.com/38412
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Wang Shilong <wshilong@whamcloud.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>

diff --git a/lustre/lov/lov_io.c b/lustre/lov/lov_io.c
index ef9e5bb..ce87872 100644 (file)
--- a/lustre/lov/lov_io.c
+++ b/lustre/lov/lov_io.c
@@ -373,11 +373,12 @@ static int lov_io_mirror_init(struct lov_io *lio, struct lov_object *obj,
                        /**
                         * for truncate, we uses [size, EOF) to judge whether
                         * a write intent needs to be send, but we need to
-                        * restore the write extent to [0, size).
+                        * restore the write extent to [0, size], in truncate,
+                        * the byte in the size position is accessed.
                         */
                        io->ci_write_intent.e_start = 0;
                        io->ci_write_intent.e_end =
-                                       io->u.ci_setattr.sa_attr.lvb_size;
+                                       io->u.ci_setattr.sa_attr.lvb_size + 1;
                }
                /* stop cl_io_init() loop */
                RETURN(1);