From bf89e87427fb99b994eb0dfb710bb4b45785f733 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 18 Dec 2015 16:35:23 +0100 Subject: [PATCH] vhdx: Fix "log that needs to be replayed" error message The arguments of error_setg_errno() should yield a short error string without newlines. Here, we try to append additional help to the error message by embedding newlines in the error string. That's nice, but it's doesn't play nicely with the errno part. tests/qemu-iotests/070.out shows the resulting mess: can't open device TEST_DIR/iotest-dirtylog-10G-4M.vhdx: VHDX image file 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' opened read-only, but contains a log that needs to be replayed. To replay the log, execute: qemu-img check -r all 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx': Operation not permitted Switch to error_setg() and error_append_hint(). Result: can't open device TEST_DIR/iotest-dirtylog-10G-4M.vhdx: VHDX image file 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' opened read-only, but contains a log that needs to be replayed To replay the log, run: qemu-img check -r all 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake Message-Id: <1450452927-8346-21-git-send-email-armbru@redhat.com> --- block/vhdx-log.c | 13 +++++++------ tests/qemu-iotests/070.out | 5 +++-- 2 files changed, 10 insertions(+), 8 deletions(-) diff --git a/block/vhdx-log.c b/block/vhdx-log.c index 47ae4b1351..ab86416def 100644 --- a/block/vhdx-log.c +++ b/block/vhdx-log.c @@ -784,12 +784,13 @@ int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed, if (logs.valid) { if (bs->read_only) { ret = -EPERM; - error_setg_errno(errp, EPERM, - "VHDX image file '%s' opened read-only, but " - "contains a log that needs to be replayed. To " - "replay the log, execute:\n qemu-img check -r " - "all '%s'", - bs->filename, bs->filename); + error_setg(errp, + "VHDX image file '%s' opened read-only, but " + "contains a log that needs to be replayed", + bs->filename); + error_append_hint(errp, "To replay the log, run:\n" + "qemu-img check -r all '%s'\n", + bs->filename); goto exit; } /* now flush the log */ diff --git a/tests/qemu-iotests/070.out b/tests/qemu-iotests/070.out index ffd425157f..131a5b17dc 100644 --- a/tests/qemu-iotests/070.out +++ b/tests/qemu-iotests/070.out @@ -1,8 +1,9 @@ QA output created by 070 === Verify open image read-only fails, due to dirty log === -can't open device TEST_DIR/iotest-dirtylog-10G-4M.vhdx: VHDX image file 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' opened read-only, but contains a log that needs to be replayed. To replay the log, execute: - qemu-img check -r all 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx': Operation not permitted +can't open device TEST_DIR/iotest-dirtylog-10G-4M.vhdx: VHDX image file 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' opened read-only, but contains a log that needs to be replayed +To replay the log, run: +qemu-img check -r all 'TEST_DIR/iotest-dirtylog-10G-4M.vhdx' no file open, try 'help open' === Verify open image replays log === read 18874368/18874368 bytes at offset 0