[libvirt] [PATCH] storage: dir: adapts .wipeVol for ploop volumes
The modification of .volWipe callback wipes ploop volume using one of
given wiping algorithm: dod, nnsa, etc.
However, in case of ploop volume we need to reinitialize root.hds and DiskDescriptor.xml.
Signed-off-by: Olga Krishtal <okrishtal(a)virtuozzo.com>
---
src/storage/storage_backend.c | 58 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 52 insertions(+), 6 deletions(-)
diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index d47a76a..367a887 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -2295,6 +2295,45 @@ virStorageBackendWipeLocal(virStorageVolDefPtr vol,
return ret;
}
+static int
+virStorageBackendVolWipePloop(virStorageVolDefPtr vol)
+{
+ virCommandPtr cmd = NULL;
+ char *target_path = NULL;
+ char *disk_desc = NULL;
+ int ret = -1;
+
+ if (virAsprintf(&target_path, "%s/root.hds", vol->target.path) <
0)
+ goto cleanup;
+
+ if (virAsprintf(&disk_desc, "%s/DiskDescriptor.xml",
vol->target.path) < 0)
+ goto cleanup;
+
+ if (virFileRemove(disk_desc, 0, 0) < 0) {
+ virReportError(errno, _("Failed to delete DiskDescriptor.xml of volume
'%s'"),
+ vol->target.path);
+ goto cleanup;
+ }
+ if (virFileRemove(target_path, 0, 0) < 0) {
+ virReportError(errno, _("failed to delete root.hds of volume
'%s'"),
+ vol->target.path);
+ goto cleanup;
+ }
+
+ cmd = virCommandNewArgList("ploop", "init", "-s",
NULL);
+
+ virCommandAddArgFormat(cmd, "%lluM", VIR_DIV_UP(vol->target.capacity,
+ (1024 * 1024)));
+ virCommandAddArgList(cmd, "-t", "ext4", NULL);
+ virCommandAddArgFormat(cmd, "%s/root.hds", vol->target.path);
+ ret = virCommandRun(cmd, NULL);
+
+ cleanup:
+ VIR_FREE(disk_desc);
+ VIR_FREE(target_path);
+ virCommandFree(cmd);
+ return ret;
+}
int
virStorageBackendVolWipeLocal(virConnectPtr conn ATTRIBUTE_UNUSED,
@@ -2307,6 +2346,8 @@ virStorageBackendVolWipeLocal(virConnectPtr conn ATTRIBUTE_UNUSED,
const char *alg_char = NULL;
struct stat st;
virCommandPtr cmd = NULL;
+ char *path = NULL;
+ char *target_path = vol->target.path;
virCheckFlags(0, -1);
@@ -2314,12 +2355,12 @@ virStorageBackendVolWipeLocal(virConnectPtr conn
ATTRIBUTE_UNUSED,
vol->target.path, algorithm);
if (vol->target.format == VIR_STORAGE_FILE_PLOOP) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("wiping for ploop volumes is not supported"));
- goto cleanup;
+ if (virAsprintf(&path, "%s/root.hds", vol->target.path) < 0)
+ goto cleanup;
+ target_path = path;
}
- fd = open(vol->target.path, O_RDWR);
+ fd = open(target_path, O_RDWR);
if (fd == -1) {
virReportSystemError(errno,
_("Failed to open storage volume with path
'%s'"),
@@ -2376,13 +2417,12 @@ virStorageBackendVolWipeLocal(virConnectPtr conn
ATTRIBUTE_UNUSED,
if (algorithm != VIR_STORAGE_VOL_WIPE_ALG_ZERO) {
cmd = virCommandNew(SCRUB);
virCommandAddArgList(cmd, "-f", "-p", alg_char,
- vol->target.path, NULL);
+ target_path, NULL);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
- goto cleanup;
} else {
if (S_ISREG(st.st_mode) && st.st_blocks < (st.st_size / DEV_BSIZE)) {
ret = virStorageBackendVolZeroSparseFileLocal(vol, st.st_size, fd);
@@ -2392,10 +2432,16 @@ virStorageBackendVolWipeLocal(virConnectPtr conn
ATTRIBUTE_UNUSED,
vol->target.allocation,
st.st_blksize);
}
+ if (ret < 0)
+ goto cleanup;
}
+ if (vol->target.format == VIR_STORAGE_FILE_PLOOP)
+ ret = virStorageBackendVolWipePloop(vol);
+
cleanup:
virCommandFree(cmd);
+ VIR_FREE(path);
VIR_FORCE_CLOSE(fd);
return ret;
}
--
1.8.3.1