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[Qemu-devel] [PATCH v6 03/12] VMDK: probe for monolithicFlat images
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH v6 03/12] VMDK: probe for monolithicFlat images |
Date: |
Fri, 1 Jul 2011 12:55:33 +0800 |
Probe as the same behavior as VMware does.
Recognize image as monolithicFlat descriptor file when the file is text
and the first effective line (not '#' leaded comment or space line) is
either 'version=1' or 'version=2'. No space or upper case charactors
accepted.
Signed-off-by: Fam Zheng <address@hidden>
---
block/vmdk.c | 44 ++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/block/vmdk.c b/block/vmdk.c
index 557e01e..4684670 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -102,10 +102,50 @@ static int vmdk_probe(const uint8_t *buf, int buf_size,
const char *filename)
return 0;
magic = be32_to_cpu(*(uint32_t *)buf);
if (magic == VMDK3_MAGIC ||
- magic == VMDK4_MAGIC)
+ magic == VMDK4_MAGIC) {
return 100;
- else
+ } else {
+ const char *p = (const char *)buf;
+ const char *end = p + buf_size;
+ while (p < end) {
+ if (*p == '#') {
+ /* skip comment line */
+ while (p < end && *p != '\n') {
+ p++;
+ }
+ p++;
+ continue;
+ }
+ if (*p == ' ') {
+ while (p < end && *p == ' ') {
+ p++;
+ }
+ /* skip '\r' if windows line endings used. */
+ if (p < end && *p == '\r') {
+ p++;
+ }
+ /* only accept blank lines before 'version=' line */
+ if (p == end || *p != '\n') {
+ return 0;
+ }
+ p++;
+ continue;
+ }
+ if (end - p >= strlen("version=X\n")) {
+ if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 ||
+ strncmp("version=2\n", p, strlen("version=2\n")) == 0) {
+ return 100;
+ }
+ }
+ if (end - p >= strlen("version=X\r\n")) {
+ if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0
||
+ strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0)
{
+ return 100;
+ }
+ }
+ }
return 0;
+ }
}
#define CHECK_CID 1
- [Qemu-devel] [PATCH v6 00/12] Adding VMDK monolithic flat support, Fam Zheng, 2011/07/01
- [Qemu-devel] [PATCH v6 05/12] VMDK: add field BDRVVmdkState.desc_offset, Fam Zheng, 2011/07/01
- [Qemu-devel] [PATCH v6 06/12] VMDK: flush multiple extents, Fam Zheng, 2011/07/01
- [Qemu-devel] [PATCH v6 07/12] VMDK: move 'static' cid_update flag to bs field, Fam Zheng, 2011/07/01
- [Qemu-devel] [PATCH v6 08/12] VMDK: change get_cluster_offset return type, Fam Zheng, 2011/07/01