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[Qemu-devel] [PATCH v2 04/17] block: add error parameter to bdrv_snapsho
From: |
Pavel Hrdina |
Subject: |
[Qemu-devel] [PATCH v2 04/17] block: add error parameter to bdrv_snapshot_delete() and related functions |
Date: |
Thu, 13 Dec 2012 16:40:38 +0100 |
Signed-off-by: Pavel Hrdina <address@hidden>
---
block.c | 27 +++++++++++++++++++--------
block.h | 4 +++-
block/qcow2-snapshot.c | 10 +++++++++-
block/qcow2.h | 4 +++-
block/rbd.c | 6 +++++-
block/sheepdog.c | 4 +++-
block_int.h | 4 +++-
qemu-img.c | 6 +-----
savevm.c | 4 ++--
9 files changed, 48 insertions(+), 21 deletions(-)
diff --git a/block.c b/block.c
index d012b0e..1ec4d24 100644
--- a/block.c
+++ b/block.c
@@ -3128,16 +3128,27 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
return ret;
}
-int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+int bdrv_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp)
{
BlockDriver *drv = bs->drv;
- if (!drv)
- return -ENOMEDIUM;
- if (drv->bdrv_snapshot_delete)
- return drv->bdrv_snapshot_delete(bs, snapshot_id);
- if (bs->file)
- return bdrv_snapshot_delete(bs->file, snapshot_id);
- return -ENOTSUP;
+ int ret;
+
+ if (!drv) {
+ error_setg(errp, "Device '%s' has no medium.",
+ bdrv_get_device_name(bs));
+ ret = -ENOMEDIUM;
+ } else if (drv->bdrv_snapshot_delete) {
+ ret = drv->bdrv_snapshot_delete(bs, snapshot_id, errp);
+ } else if (bs->file) {
+ ret = bdrv_snapshot_delete(bs->file, snapshot_id, errp);
+ } else {
+ error_setg(errp, "Not supported.");
+ ret = -ENOTSUP;
+ }
+
+ return ret;
}
int bdrv_snapshot_list(BlockDriverState *bs,
diff --git a/block.h b/block.h
index 31642c2..b6b25a7 100644
--- a/block.h
+++ b/block.h
@@ -326,7 +326,9 @@ int bdrv_snapshot_create(BlockDriverState *bs,
int bdrv_snapshot_goto(BlockDriverState *bs,
const char *snapshot_id,
Error **errp);
-int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
+int bdrv_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp);
int bdrv_snapshot_list(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int bdrv_snapshot_load_tmp(BlockDriverState *bs,
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
index e07f9ac..0bd0d1f 100644
--- a/block/qcow2-snapshot.c
+++ b/block/qcow2-snapshot.c
@@ -550,7 +550,9 @@ fail:
return ret;
}
-int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+int qcow2_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp)
{
BDRVQcowState *s = bs->opaque;
QCowSnapshot sn;
@@ -559,6 +561,8 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
/* Search the snapshot */
snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_id);
if (snapshot_index < 0) {
+ error_setg(errp, "Failed to find snapshot '%s' by id or name.",
+ snapshot_id);
return -ENOENT;
}
sn = s->snapshots[snapshot_index];
@@ -570,6 +574,8 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
s->nb_snapshots--;
ret = qcow2_write_snapshots(bs);
if (ret < 0) {
+ error_setg(errp, "Failed to remove snapshot '%s' from snapshot list",
+ snapshot_id);
return ret;
}
@@ -587,6 +593,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
ret = qcow2_update_snapshot_refcount(bs, sn.l1_table_offset,
sn.l1_size, -1);
if (ret < 0) {
+ error_setg(errp, "Failed to update snapshot refcount.");
return ret;
}
qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * sizeof(uint64_t));
@@ -594,6 +601,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
/* must update the copied flag on the current cluster offsets */
ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size,
0);
if (ret < 0) {
+ error_setg(errp, "Failed to update snapshot refcount.");
return ret;
}
diff --git a/block/qcow2.h b/block/qcow2.h
index 6babb56..8dfdbb7 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -314,7 +314,9 @@ int qcow2_snapshot_create(BlockDriverState *bs,
int qcow2_snapshot_goto(BlockDriverState *bs,
const char *snapshot_id,
Error **errp);
-int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
+int qcow2_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp);
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab);
int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name);
diff --git a/block/rbd.c b/block/rbd.c
index 3e789c6..f8fe938 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -848,12 +848,16 @@ static int qemu_rbd_snap_create(BlockDriverState *bs,
}
static int qemu_rbd_snap_remove(BlockDriverState *bs,
- const char *snapshot_name)
+ const char *snapshot_name,
+ Error **errp)
{
BDRVRBDState *s = bs->opaque;
int r;
r = rbd_snap_remove(s->image, snapshot_name);
+ if (r < 0) {
+ error_setg(errp, "Failed to remove snapshot.");
+ }
return r;
}
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 34ef75c..c7f8d9e 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1879,7 +1879,9 @@ out:
return ret;
}
-static int sd_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+static int sd_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp)
{
/* FIXME: Delete specified snapshot id. */
return 0;
diff --git a/block_int.h b/block_int.h
index 016782c..779e3cb 100644
--- a/block_int.h
+++ b/block_int.h
@@ -152,7 +152,9 @@ struct BlockDriver {
int (*bdrv_snapshot_goto)(BlockDriverState *bs,
const char *snapshot_id,
Error **errp);
- int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id);
+ int (*bdrv_snapshot_delete)(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp);
int (*bdrv_snapshot_list)(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
diff --git a/qemu-img.c b/qemu-img.c
index 91671a8..fd9b525 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1568,11 +1568,7 @@ static int img_snapshot(int argc, char **argv)
break;
case SNAPSHOT_DELETE:
- ret = bdrv_snapshot_delete(bs, snapshot_name);
- if (ret) {
- error_report("Could not delete snapshot '%s': %d (%s)",
- snapshot_name, ret, strerror(-ret));
- }
+ ret = bdrv_snapshot_delete(bs, snapshot_name, &err);
break;
}
diff --git a/savevm.c b/savevm.c
index 29e41fc..2aaa08b 100644
--- a/savevm.c
+++ b/savevm.c
@@ -2097,7 +2097,7 @@ static int del_existing_snapshots(Monitor *mon, const
char *name)
if (bdrv_can_snapshot(bs) &&
bdrv_snapshot_find(bs, snapshot, name) >= 0)
{
- ret = bdrv_snapshot_delete(bs, name);
+ ret = bdrv_snapshot_delete(bs, name, NULL);
if (ret < 0) {
monitor_printf(mon,
"Error while deleting snapshot on '%s'\n",
@@ -2344,7 +2344,7 @@ void do_delvm(Monitor *mon, const QDict *qdict)
bs1 = NULL;
while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
- ret = bdrv_snapshot_delete(bs1, name);
+ ret = bdrv_snapshot_delete(bs1, name, NULL);
if (ret < 0) {
if (ret == -ENOTSUP)
monitor_printf(mon,
--
1.8.0.2
- Re: [Qemu-devel] [PATCH v2 03/17] block: add error parameter to bdrv_snapshot_goto() and related functions, (continued)
- [Qemu-devel] [PATCH v2 07/17] block: add error parameter to del_existing_snapshots(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 02/17] block: add error parameter to bdrv_snapshot_create() and related functions, Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 12/17] savevm: add error parameter to qemu_loadvm_state(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 06/17] block: add error parameter to bdrv_snapshot_find(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 05/17] block: add error parameter to bdrv_snapshot_list() and related functions, Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 04/17] block: add error parameter to bdrv_snapshot_delete() and related functions,
Pavel Hrdina <=
- [Qemu-devel] [PATCH v2 09/17] savevm: add error parameter to qemu_savevm_state_iterate(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 16/17] qapi: Convert info snapshots, Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 11/17] savevm: add error parameter to qemu_savevm_state(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 13/17] qapi: Convert savevm, Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 10/17] savevm: add error parameter to qemu_savevm_state_complete(), Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 17/17] vm-snapshot-save: add force parameter, Pavel Hrdina, 2012/12/13
- [Qemu-devel] [PATCH v2 14/17] qapi: Convert loadvm, Pavel Hrdina, 2012/12/13