On Thu, 12/17 17:49, Markus Armbruster wrote:
> vmdk_parse_extents() reports parse errors like this:
>
> error_setg(errp, "Invalid extent lines:\n%s", p);
>
> where p points to the beginning of the malformed line in the image
> descriptor. This results in a multi-line error message
>
> Invalid extent lines:
> <first line that doesn't parse>
> <remaining text that may or may not parse, if any>
>
> Error messages should not have newlines embedded. Since the remaining
> text is not helpful, we can simply report:
>
> Invalid extent line: <first line that doesn't parse>
>
> Cc: Fam Zheng <f...@redhat.com>
> Signed-off-by: Markus Armbruster <arm...@redhat.com>
> ---
> block/vmdk.c | 19 ++++++++++++-------
> tests/qemu-iotests/059.out | 4 +---
> 2 files changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/block/vmdk.c b/block/vmdk.c
> index 08fa3f3..04b47e3 100644
> --- a/block/vmdk.c
> +++ b/block/vmdk.c
> @@ -780,7 +780,7 @@ static int vmdk_parse_extents(const char *desc,
> BlockDriverState *bs,
> char access[11];
> char type[11];
> char fname[512];
> - const char *p;
> + const char *p, *np;
> int64_t sectors = 0;
> int64_t flat_offset;
> char *extent_path;
> @@ -805,19 +805,16 @@ static int vmdk_parse_extents(const char *desc,
> BlockDriverState *bs,
> continue;
> } else if (!strcmp(type, "FLAT")) {
> if (matches != 5 || flat_offset < 0) {
> - error_setg(errp, "Invalid extent lines: \n%s", p);
> - return -EINVAL;
> + goto invalid;
> }
> } else if (!strcmp(type, "VMFS")) {
> if (matches == 4) {
> flat_offset = 0;
> } else {
> - error_setg(errp, "Invalid extent lines:\n%s", p);
> - return -EINVAL;
> + goto invalid;
> }
> } else if (matches != 4) {
> - error_setg(errp, "Invalid extent lines:\n%s", p);
> - return -EINVAL;
> + goto invalid;
> }
>
> if (sectors <= 0 ||
> @@ -883,6 +880,14 @@ static int vmdk_parse_extents(const char *desc,
> BlockDriverState *bs,
> extent->type = g_strdup(type);
> }
> return 0;
> +
> +invalid:
> + np = next_line(p);
> + assert(np != p);
> + if (np[-1] == '\n')
> + np--;
Braces are required.
> + error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p);
> + return -EINVAL;
> }
>
> static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
> diff --git a/tests/qemu-iotests/059.out b/tests/qemu-iotests/059.out
> index d28df5b..9d506cb 100644
> --- a/tests/qemu-iotests/059.out
> +++ b/tests/qemu-iotests/059.out
> @@ -2038,9 +2038,7 @@ Format specific information:
> format: FLAT
>
> === Testing malformed VMFS extent description line ===
> -qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Invalid extent lines:
> -RW 12582912 VMFS "dummy.IMGFMT" 1
> -
> +qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Invalid extent line: RW
> 12582912 VMFS "dummy.IMGFMT" 1
>
> === Testing truncated sparse ===
> Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=107374182400
> subformat=monolithicSparse
> --
> 2.4.3
>
