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[Qemu-devel] [PATCH v2 02/12] block: update error reporting for bdrv_sna
From: |
Pavel Hrdina |
Subject: |
[Qemu-devel] [PATCH v2 02/12] block: update error reporting for bdrv_snapshot_delete() and related functions |
Date: |
Wed, 24 Apr 2013 17:32:00 +0200 |
Signed-off-by: Pavel Hrdina <address@hidden>
---
block.c | 21 +++++++++++++--------
block/qcow2-snapshot.c | 19 +++++++++++++------
block/qcow2.h | 4 +++-
block/rbd.c | 10 +++++++---
block/sheepdog.c | 6 ++++--
include/block/block.h | 4 +++-
include/block/block_int.h | 4 +++-
qemu-img.c | 8 +++-----
savevm.c | 32 ++++++++++++++++----------------
9 files changed, 65 insertions(+), 43 deletions(-)
diff --git a/block.c b/block.c
index aa9a533..3f7ee38 100644
--- a/block.c
+++ b/block.c
@@ -3438,16 +3438,21 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
return -ENOTSUP;
}
-int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+void 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;
+
+ if (!drv) {
+ error_setg(errp, "Device has no medium");
+ } else if (drv->bdrv_snapshot_delete) {
+ drv->bdrv_snapshot_delete(bs, snapshot_id, errp);
+ } else if (bs->file) {
+ bdrv_snapshot_delete(bs->file, snapshot_id, errp);
+ } else {
+ error_setg(errp, "Snapshots are not supported");
+ }
}
int bdrv_snapshot_list(BlockDriverState *bs,
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
index 992a5c8..fd0e231 100644
--- a/block/qcow2-snapshot.c
+++ b/block/qcow2-snapshot.c
@@ -530,7 +530,9 @@ fail:
return ret;
}
-int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+void qcow2_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp)
{
BDRVQcowState *s = bs->opaque;
QCowSnapshot sn;
@@ -539,7 +541,9 @@ 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) {
- return -ENOENT;
+ error_setg(errp, "Failed to find snapshot '%s' by id or name",
+ snapshot_id);
+ return;
}
sn = s->snapshots[snapshot_index];
@@ -550,7 +554,9 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
s->nb_snapshots--;
ret = qcow2_write_snapshots(bs);
if (ret < 0) {
- return ret;
+ error_setg_errno(errp, -ret, "Failed to remove snapshot '%s' from "
+ "snapshot list", sn.name);
+ return;
}
/*
@@ -567,14 +573,16 @@ 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) {
- return ret;
+ error_setg_errno(errp, -ret, "Failed to update refcounts");
+ return;
}
qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * sizeof(uint64_t));
/* 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) {
- return ret;
+ error_setg_errno(errp, -ret, "Failed to update cluster flags");
+ return;
}
#ifdef DEBUG_ALLOC
@@ -583,7 +591,6 @@ int qcow2_snapshot_delete(BlockDriverState *bs, const char
*snapshot_id)
qcow2_check_refcounts(bs, &result, 0);
}
#endif
- return 0;
}
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
diff --git a/block/qcow2.h b/block/qcow2.h
index 9421843..dbd332d 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -384,7 +384,9 @@ int qcow2_zero_clusters(BlockDriverState *bs, uint64_t
offset, int nb_sectors);
/* qcow2-snapshot.c functions */
int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id);
-int qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
+void 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 1826411..1e54c55 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -899,14 +899,18 @@ static int qemu_rbd_snap_create(BlockDriverState *bs,
return 0;
}
-static int qemu_rbd_snap_remove(BlockDriverState *bs,
- const char *snapshot_name)
+static void qemu_rbd_snap_remove(BlockDriverState *bs,
+ const char *snapshot_name,
+ Error **errp)
{
BDRVRBDState *s = bs->opaque;
int r;
r = rbd_snap_remove(s->image, snapshot_name);
- return r;
+ if (r < 0) {
+ error_setg_errno(errp, -r, "Failed to remove snapshot '%s'",
+ snapshot_name);
+ }
}
static int qemu_rbd_snap_rollback(BlockDriverState *bs,
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 20b5d06..7e0610f 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1937,10 +1937,12 @@ out:
return ret;
}
-static int sd_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
+static void sd_snapshot_delete(BlockDriverState *bs,
+ const char *snapshot_id,
+ Error **errp)
{
/* FIXME: Delete specified snapshot id. */
- return 0;
+ error_setg(errp, "Deleting snapshot is not supported");
}
static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
diff --git a/include/block/block.h b/include/block/block.h
index 1251c5c..abb636d 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -337,7 +337,9 @@ int bdrv_snapshot_create(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);
int bdrv_snapshot_goto(BlockDriverState *bs,
const char *snapshot_id);
-int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
+void 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/include/block/block_int.h b/include/block/block_int.h
index 6078dd3..c3f67c3 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -156,7 +156,9 @@ struct BlockDriver {
QEMUSnapshotInfo *sn_info);
int (*bdrv_snapshot_goto)(BlockDriverState *bs,
const char *snapshot_id);
- int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id);
+ void (*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 ab83fbe..9cf3467 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1932,6 +1932,7 @@ static int img_snapshot(int argc, char **argv)
{
BlockDriverState *bs;
QEMUSnapshotInfo sn;
+ Error *local_err = NULL;
char *filename, *snapshot_name = NULL;
int c, ret = 0, bdrv_oflags;
int action = 0;
@@ -2029,11 +2030,8 @@ 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));
- }
+ bdrv_snapshot_delete(bs, snapshot_name, &local_err);
+ ret = qemu_img_handle_error(local_err);
break;
}
diff --git a/savevm.c b/savevm.c
index 31dcce9..ba97c41 100644
--- a/savevm.c
+++ b/savevm.c
@@ -2291,18 +2291,20 @@ static int del_existing_snapshots(Monitor *mon, const
char *name)
{
BlockDriverState *bs;
QEMUSnapshotInfo sn1, *snapshot = &sn1;
- int ret;
+ Error *local_err = NULL;
bs = NULL;
while ((bs = bdrv_next(bs))) {
if (bdrv_can_snapshot(bs) &&
bdrv_snapshot_find(bs, snapshot, name) >= 0)
{
- ret = bdrv_snapshot_delete(bs, name);
- if (ret < 0) {
- monitor_printf(mon,
- "Error while deleting snapshot on '%s'\n",
- bdrv_get_device_name(bs));
+ bdrv_snapshot_delete(bs, name, &local_err);
+ if (error_is_set(&local_err)) {
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "Failed to delete "
+ "old snapshot on device '%s': %s",
+ bdrv_get_device_name(bs),
+ error_get_pretty(local_err));
+ error_free(local_err);
return -1;
}
}
@@ -2516,7 +2518,7 @@ int load_vmstate(const char *name)
void do_delvm(Monitor *mon, const QDict *qdict)
{
BlockDriverState *bs, *bs1;
- int ret;
+ Error *local_err = NULL;
const char *name = qdict_get_str(qdict, "name");
bs = bdrv_snapshots();
@@ -2528,15 +2530,13 @@ 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);
- if (ret < 0) {
- if (ret == -ENOTSUP)
- monitor_printf(mon,
- "Snapshots not supported on device '%s'\n",
- bdrv_get_device_name(bs1));
- else
- monitor_printf(mon, "Error %d while deleting snapshot on "
- "'%s'\n", ret, bdrv_get_device_name(bs1));
+ bdrv_snapshot_delete(bs1, name, &local_err);
+ if (error_is_set(&local_err)) {
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "Failed to delete "
+ "old snapshot on device '%s': %s",
+ bdrv_get_device_name(bs),
+ error_get_pretty(local_err));
+ error_free(local_err);
}
}
}
--
1.8.1.4
- Re: [Qemu-devel] [PATCH v2 04/12] qapi: Convert delvm, (continued)
[Qemu-devel] [PATCH v2 10/12] savevm: update error reporting of qemu_savevm_state() and related functions, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 08/12] qapi: Convert loadvm, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 09/12] block: update error reporting for bdrv_snapshot_create() and related functions, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 05/12] block: update error reporting for bdrv_snapshot_goto() and related functions, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 11/12] qapi: Convert savevm, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 12/12] savevm: remove backward compatibility from bdrv_snapshot_find(), Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 06/12] block: update error reporting for bdrv_snapshot_list() and related functions, Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 07/12] savevm: update error reporting for qemu_loadvm_state(), Pavel Hrdina, 2013/04/24
[Qemu-devel] [PATCH v2 02/12] block: update error reporting for bdrv_snapshot_delete() and related functions,
Pavel Hrdina <=
Re: [Qemu-devel] [PATCH v2 00/12] covert savevm, loadvm and delvm into qapi, Eric Blake, 2013/04/24
Re: [Qemu-devel] [PATCH v2 00/12] covert savevm, loadvm and delvm into qapi, Stefan Hajnoczi, 2013/04/25