75 lines
2.5 KiB
Diff
75 lines
2.5 KiB
Diff
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From 930e57ecb64bbab75c2b71d0d1ba07451fec4567 Mon Sep 17 00:00:00 2001
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From: Fam Zheng <famcool@gmail.com>
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Date: Tue, 12 Jul 2011 19:56:30 +0800
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Subject: [PATCH 04/12] VMDK: probe for monolithicFlat images
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Probe as the same behavior as VMware does.
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Recognize image as monolithicFlat descriptor file when the file is text
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and the first effective line (not '#' leaded comment or space line) is
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either 'version=1' or 'version=2'. No space or upper case charactors
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accepted.
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Signed-off-by: Fam Zheng <famcool@gmail.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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block/vmdk.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 43 insertions(+), 2 deletions(-)
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -103,10 +103,51 @@ static int vmdk_probe(const uint8_t *buf
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return 0;
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magic = be32_to_cpu(*(uint32_t *)buf);
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if (magic == VMDK3_MAGIC ||
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- magic == VMDK4_MAGIC)
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+ magic == VMDK4_MAGIC) {
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return 100;
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- else
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+ } else {
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+ const char *p = (const char *)buf;
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+ const char *end = p + buf_size;
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+ while (p < end) {
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+ if (*p == '#') {
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+ /* skip comment line */
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+ while (p < end && *p != '\n') {
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+ p++;
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+ }
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+ p++;
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+ continue;
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+ }
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+ if (*p == ' ') {
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+ while (p < end && *p == ' ') {
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+ p++;
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+ }
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+ /* skip '\r' if windows line endings used. */
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+ if (p < end && *p == '\r') {
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+ p++;
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+ }
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+ /* only accept blank lines before 'version=' line */
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+ if (p == end || *p != '\n') {
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+ return 0;
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+ }
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+ p++;
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+ continue;
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+ }
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+ if (end - p >= strlen("version=X\n")) {
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+ if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
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+ strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
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+ return 100;
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+ }
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+ }
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+ if (end - p >= strlen("version=X\r\n")) {
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+ if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 ||
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+ strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) {
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+ return 100;
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+ }
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+ }
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+ return 0;
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+ }
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return 0;
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+ }
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}
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#define CHECK_CID 1
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