[libvirt] [PATCH v2 1/6] logical: Create helper virStorageBackendLogicalParseVolExtents
John Ferlan
jferlan at redhat.com
Thu Jan 28 22:44:04 UTC 2016
Create a helper routine in order to parse any extents information
including the extent size, length, and the device string contained
within the generated 'lvs' output string.
A future patch would then be able to avoid the code more cleanly
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
src/storage/storage_backend_logical.c | 208 ++++++++++++++++++----------------
1 file changed, 113 insertions(+), 95 deletions(-)
diff --git a/src/storage/storage_backend_logical.c b/src/storage/storage_backend_logical.c
index 944be40..7c05b6a 100644
--- a/src/storage/storage_backend_logical.c
+++ b/src/storage/storage_backend_logical.c
@@ -72,98 +72,18 @@ struct virStorageBackendLogicalPoolVolData {
};
static int
-virStorageBackendLogicalMakeVol(char **const groups,
- void *opaque)
+virStorageBackendLogicalParseVolExtents(virStorageVolDefPtr vol,
+ char **const groups)
{
- struct virStorageBackendLogicalPoolVolData *data = opaque;
- virStoragePoolObjPtr pool = data->pool;
- virStorageVolDefPtr vol = NULL;
- bool is_new_vol = false;
- unsigned long long offset, size, length;
+ int nextents, ret = -1;
const char *regex_unit = "(\\S+)\\((\\S+)\\)";
char *regex = NULL;
regex_t *reg = NULL;
regmatch_t *vars = NULL;
char *p = NULL;
size_t i;
- int err, nextents, nvars, ret = -1;
- const char *attrs = groups[9];
-
- /* Skip inactive volume */
- if (attrs[4] != 'a')
- return 0;
-
- /*
- * Skip thin pools(t). These show up in normal lvs output
- * but do not have a corresponding /dev/$vg/$lv device that
- * is created by udev. This breaks assumptions in later code.
- */
- if (attrs[0] == 't')
- return 0;
-
- /* See if we're only looking for a specific volume */
- if (data->vol != NULL) {
- vol = data->vol;
- if (STRNEQ(vol->name, groups[0]))
- return 0;
- }
-
- /* Or filling in more data on an existing volume */
- if (vol == NULL)
- vol = virStorageVolDefFindByName(pool, groups[0]);
-
- /* Or a completely new volume */
- if (vol == NULL) {
- if (VIR_ALLOC(vol) < 0)
- return -1;
-
- is_new_vol = true;
- vol->type = VIR_STORAGE_VOL_BLOCK;
-
- if (VIR_STRDUP(vol->name, groups[0]) < 0)
- goto cleanup;
-
- }
-
- if (vol->target.path == NULL) {
- if (virAsprintf(&vol->target.path, "%s/%s",
- pool->def->target.path, vol->name) < 0)
- goto cleanup;
- }
-
- /* Mark the (s) sparse/snapshot lv, e.g. the lv created using
- * the --virtualsize/-V option. We've already ignored the (t)hin
- * pool definition. In the manner libvirt defines these, the
- * thin pool is hidden to the lvs output, except as the name
- * in brackets [] described for the groups[1] (backingStore).
- */
- if (attrs[0] == 's')
- vol->target.sparse = true;
-
- /* Skips the backingStore of lv created with "--virtualsize",
- * its original device "/dev/$vgname/$lvname_vorigin" is
- * just for lvm internal use, one should never use it.
- *
- * (lvs outputs "[$lvname_vorigin] for field "origin" if the
- * lv is created with "--virtualsize").
- */
- if (groups[1] && STRNEQ(groups[1], "") && (groups[1][0] != '[')) {
- if (VIR_ALLOC(vol->target.backingStore) < 0)
- goto cleanup;
-
- if (virAsprintf(&vol->target.backingStore->path, "%s/%s",
- pool->def->target.path, groups[1]) < 0)
- goto cleanup;
-
- vol->target.backingStore->format = VIR_STORAGE_POOL_LOGICAL_LVM2;
- }
-
- if (!vol->key && VIR_STRDUP(vol->key, groups[2]) < 0)
- goto cleanup;
-
- if (virStorageBackendUpdateVolInfo(vol, false,
- VIR_STORAGE_VOL_OPEN_DEFAULT, 0) < 0)
- goto cleanup;
+ int err, nvars;
+ unsigned long long offset, size, length;
nextents = 1;
if (STREQ(groups[4], VIR_STORAGE_VOL_LOGICAL_SEGTYPE_STRIPED)) {
@@ -174,7 +94,7 @@ virStorageBackendLogicalMakeVol(char **const groups,
}
}
- /* Finally fill in extents information */
+ /* Allocate and fill in extents information */
if (VIR_REALLOC_N(vol->source.extents,
vol->source.nextent + nextents) < 0)
goto cleanup;
@@ -184,18 +104,13 @@ virStorageBackendLogicalMakeVol(char **const groups,
"%s", _("malformed volume extent length value"));
goto cleanup;
}
+
if (virStrToLong_ull(groups[7], NULL, 10, &size) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent size value"));
goto cleanup;
}
- if (virStrToLong_ull(groups[8], NULL, 10, &vol->target.allocation) < 0) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- "%s", _("malformed volume allocation value"));
- goto cleanup;
- }
- /* Now parse the "devices" field separately */
if (VIR_STRDUP(regex, regex_unit) < 0)
goto cleanup;
@@ -269,6 +184,112 @@ virStorageBackendLogicalMakeVol(char **const groups,
vol->source.nextent++;
}
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(regex);
+ VIR_FREE(reg);
+ VIR_FREE(vars);
+ return ret;
+}
+
+
+static int
+virStorageBackendLogicalMakeVol(char **const groups,
+ void *opaque)
+{
+ struct virStorageBackendLogicalPoolVolData *data = opaque;
+ virStoragePoolObjPtr pool = data->pool;
+ virStorageVolDefPtr vol = NULL;
+ bool is_new_vol = false;
+ int ret = -1;
+ const char *attrs = groups[9];
+
+ /* Skip inactive volume */
+ if (attrs[4] != 'a')
+ return 0;
+
+ /*
+ * Skip thin pools(t). These show up in normal lvs output
+ * but do not have a corresponding /dev/$vg/$lv device that
+ * is created by udev. This breaks assumptions in later code.
+ */
+ if (attrs[0] == 't')
+ return 0;
+
+ /* See if we're only looking for a specific volume */
+ if (data->vol != NULL) {
+ vol = data->vol;
+ if (STRNEQ(vol->name, groups[0]))
+ return 0;
+ }
+
+ /* Or filling in more data on an existing volume */
+ if (vol == NULL)
+ vol = virStorageVolDefFindByName(pool, groups[0]);
+
+ /* Or a completely new volume */
+ if (vol == NULL) {
+ if (VIR_ALLOC(vol) < 0)
+ return -1;
+
+ is_new_vol = true;
+ vol->type = VIR_STORAGE_VOL_BLOCK;
+
+ if (VIR_STRDUP(vol->name, groups[0]) < 0)
+ goto cleanup;
+
+ }
+
+ if (vol->target.path == NULL) {
+ if (virAsprintf(&vol->target.path, "%s/%s",
+ pool->def->target.path, vol->name) < 0)
+ goto cleanup;
+ }
+
+ /* Mark the (s) sparse/snapshot lv, e.g. the lv created using
+ * the --virtualsize/-V option. We've already ignored the (t)hin
+ * pool definition. In the manner libvirt defines these, the
+ * thin pool is hidden to the lvs output, except as the name
+ * in brackets [] described for the groups[1] (backingStore).
+ */
+ if (attrs[0] == 's')
+ vol->target.sparse = true;
+
+ /* Skips the backingStore of lv created with "--virtualsize",
+ * its original device "/dev/$vgname/$lvname_vorigin" is
+ * just for lvm internal use, one should never use it.
+ *
+ * (lvs outputs "[$lvname_vorigin] for field "origin" if the
+ * lv is created with "--virtualsize").
+ */
+ if (groups[1] && STRNEQ(groups[1], "") && (groups[1][0] != '[')) {
+ if (VIR_ALLOC(vol->target.backingStore) < 0)
+ goto cleanup;
+
+ if (virAsprintf(&vol->target.backingStore->path, "%s/%s",
+ pool->def->target.path, groups[1]) < 0)
+ goto cleanup;
+
+ vol->target.backingStore->format = VIR_STORAGE_POOL_LOGICAL_LVM2;
+ }
+
+ if (!vol->key && VIR_STRDUP(vol->key, groups[2]) < 0)
+ goto cleanup;
+
+ if (virStorageBackendUpdateVolInfo(vol, false,
+ VIR_STORAGE_VOL_OPEN_DEFAULT, 0) < 0)
+ goto cleanup;
+
+ if (virStrToLong_ull(groups[8], NULL, 10, &vol->target.allocation) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("malformed volume allocation value"));
+ goto cleanup;
+ }
+
+ if (virStorageBackendLogicalParseVolExtents(vol, groups) < 0)
+ goto cleanup;
+
if (is_new_vol &&
VIR_APPEND_ELEMENT(pool->volumes.objs, pool->volumes.count, vol) < 0)
goto cleanup;
@@ -276,9 +297,6 @@ virStorageBackendLogicalMakeVol(char **const groups,
ret = 0;
cleanup:
- VIR_FREE(regex);
- VIR_FREE(reg);
- VIR_FREE(vars);
if (is_new_vol && (ret == -1))
virStorageVolDefFree(vol);
return ret;
--
2.5.0
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