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fix #1534: vma: Add extract filter for disk images 

Add a filter to the "vma extract" command. A comma seperated list of
disk images that should be extracted can be passed with the "-d" option.

Example to extract an IDE drive and an SCSI drive from vzdump.vma:

vma extract vzdump.vma -d "drive-ide0,drive-scsi0" extractdir

Signed-off-by: Filip Schauer <f.schauer@proxmox.com>
master
Filip Schauer 2023-08-30 10:33:47 +02:00 committed by Fiona Ebner
parent 6cadf3677d
commit 0cff91a000
1 changed files with 31 additions and 9 deletions
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40
debian/patches/pve/0027-PVE-Backup-add-vma-backup-format-code.patch vendored
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@ -1735,10 +1735,10 @@ index 0000000000..ac7da237d0
+}
diff --git a/vma.c b/vma.c
new file mode 100644
index 0000000000..c76ecefa0f
index 0000000000..1604d955d8
--- /dev/null
+++ b/vma.c
@@ -0,0 +1,878 @@
@@ -0,0 +1,900 @@
+/*
+ * VMA: Virtual Machine Archive
+ *
@ -1772,7 +1772,7 @@ index 0000000000..c76ecefa0f
+ "vma list <filename>\n"
+ "vma config <filename> [-c config]\n"
+ "vma create <filename> [-c config] pathname ...\n"
+ "vma extract <filename> [-r <fifo>] <targetdir>\n"
+ "vma extract <filename> [-d <drive-list>] [-r <fifo>] <targetdir>\n"
+ "vma verify <filename> [-v]\n"
+ ;
+
@ -1917,9 +1917,10 @@ index 0000000000..c76ecefa0f
+ const char *filename;
+ const char *dirname;
+ const char *readmap = NULL;
+ const gchar **drive_list = NULL;
+
+ for (;;) {
+ c = getopt(argc, argv, "hvr:");
+ c = getopt(argc, argv, "hvd:r:");
+ if (c == -1) {
+ break;
+ }
@ -1928,6 +1929,9 @@ index 0000000000..c76ecefa0f
+ case 'h':
+ help();
+ break;
+ case 'd':
+ drive_list = g_strsplit(optarg, ",", 254);
+ break;
+ case 'r':
+ readmap = optarg;
+ break;
@ -2064,12 +2068,12 @@ index 0000000000..c76ecefa0f
+
+ int i;
+ int vmstate_fd = -1;
+ guint8 vmstate_stream = 0;
+ bool drive_rename_bitmap[255];
+ memset(drive_rename_bitmap, 0, sizeof(drive_rename_bitmap));
+
+ for (i = 1; i < 255; i++) {
+ VmaDeviceInfo *di = vma_reader_get_device_info(vmar, i);
+ if (di && (strcmp(di->devname, "vmstate") == 0)) {
+ vmstate_stream = i;
+ char *statefn = g_strdup_printf("%s/vmstate.bin", dirname);
+ vmstate_fd = open(statefn, O_WRONLY|O_CREAT|O_EXCL, 0644);
+ if (vmstate_fd < 0) {
@ -2089,7 +2093,21 @@ index 0000000000..c76ecefa0f
+
+ BlockBackend *blk = NULL;
+
+ if (readmap) {
+ if (drive_list) {
+ skip = true;
+ int j;
+ for (j = 0; drive_list[j]; j++) {
+ if (strcmp(drive_list[j], di->devname) == 0) {
+ skip = false;
+ drive_rename_bitmap[i] = true;
+ break;
+ }
+ }
+ } else {
+ drive_rename_bitmap[i] = true;
+ }
+
+ if (!skip && readmap) {
+ RestoreMap *map;
+ map = (RestoreMap *)g_hash_table_lookup(devmap, di->devname);
+ if (map == NULL) {
@ -2102,7 +2120,7 @@ index 0000000000..c76ecefa0f
+ cache = map->cache;
+ write_zero = map->write_zero;
+ skip = map->skip;
+ } else {
+ } else if (!skip) {
+ devfn = g_strdup_printf("%s/tmp-disk-%s.raw",
+ dirname, di->devname);
+ printf("DEVINFO %s %zd\n", devfn, di->size);
@ -2183,6 +2201,10 @@ index 0000000000..c76ecefa0f
+ }
+ }
+
+ if (drive_list) {
+ g_strfreev(drive_list);
+ }
+
+ if (vma_reader_restore(vmar, vmstate_fd, verbose, &errp) < 0) {
+ g_error("restore failed - %s", error_get_pretty(errp));
+ }
@ -2190,7 +2212,7 @@ index 0000000000..c76ecefa0f
+ if (!readmap) {
+ for (i = 1; i < 255; i++) {
+ VmaDeviceInfo *di = vma_reader_get_device_info(vmar, i);
+ if (di && (i != vmstate_stream)) {
+ if (di && drive_rename_bitmap[i]) {
+ char *tmpfn = g_strdup_printf("%s/tmp-disk-%s.raw",
+ dirname, di->devname);
+ char *fn = g_strdup_printf("%s/disk-%s.raw",