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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/block/snapshot.c
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/block/snapshot.c')
-rw-r--r--qemu/block/snapshot.c493
1 files changed, 0 insertions, 493 deletions
diff --git a/qemu/block/snapshot.c b/qemu/block/snapshot.c
deleted file mode 100644
index e9d721df6..000000000
--- a/qemu/block/snapshot.c
+++ /dev/null
@@ -1,493 +0,0 @@
-/*
- * Block layer snapshot related functions
- *
- * Copyright (c) 2003-2008 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "block/snapshot.h"
-#include "block/block_int.h"
-#include "qapi/error.h"
-#include "qapi/qmp/qerror.h"
-
-QemuOptsList internal_snapshot_opts = {
- .name = "snapshot",
- .head = QTAILQ_HEAD_INITIALIZER(internal_snapshot_opts.head),
- .desc = {
- {
- .name = SNAPSHOT_OPT_ID,
- .type = QEMU_OPT_STRING,
- .help = "snapshot id"
- },{
- .name = SNAPSHOT_OPT_NAME,
- .type = QEMU_OPT_STRING,
- .help = "snapshot name"
- },{
- /* end of list */
- }
- },
-};
-
-int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
- const char *name)
-{
- QEMUSnapshotInfo *sn_tab, *sn;
- int nb_sns, i, ret;
-
- ret = -ENOENT;
- nb_sns = bdrv_snapshot_list(bs, &sn_tab);
- if (nb_sns < 0) {
- return ret;
- }
- for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
- *sn_info = *sn;
- ret = 0;
- break;
- }
- }
- g_free(sn_tab);
- return ret;
-}
-
-/**
- * Look up an internal snapshot by @id and @name.
- * @bs: block device to search
- * @id: unique snapshot ID, or NULL
- * @name: snapshot name, or NULL
- * @sn_info: location to store information on the snapshot found
- * @errp: location to store error, will be set only for exception
- *
- * This function will traverse snapshot list in @bs to search the matching
- * one, @id and @name are the matching condition:
- * If both @id and @name are specified, find the first one with id @id and
- * name @name.
- * If only @id is specified, find the first one with id @id.
- * If only @name is specified, find the first one with name @name.
- * if none is specified, abort().
- *
- * Returns: true when a snapshot is found and @sn_info will be filled, false
- * when error or not found. If all operation succeed but no matching one is
- * found, @errp will NOT be set.
- */
-bool bdrv_snapshot_find_by_id_and_name(BlockDriverState *bs,
- const char *id,
- const char *name,
- QEMUSnapshotInfo *sn_info,
- Error **errp)
-{
- QEMUSnapshotInfo *sn_tab, *sn;
- int nb_sns, i;
- bool ret = false;
-
- assert(id || name);
-
- nb_sns = bdrv_snapshot_list(bs, &sn_tab);
- if (nb_sns < 0) {
- error_setg_errno(errp, -nb_sns, "Failed to get a snapshot list");
- return false;
- } else if (nb_sns == 0) {
- return false;
- }
-
- if (id && name) {
- for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->id_str, id) && !strcmp(sn->name, name)) {
- *sn_info = *sn;
- ret = true;
- break;
- }
- }
- } else if (id) {
- for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->id_str, id)) {
- *sn_info = *sn;
- ret = true;
- break;
- }
- }
- } else if (name) {
- for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->name, name)) {
- *sn_info = *sn;
- ret = true;
- break;
- }
- }
- }
-
- g_free(sn_tab);
- return ret;
-}
-
-int bdrv_can_snapshot(BlockDriverState *bs)
-{
- BlockDriver *drv = bs->drv;
- if (!drv || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
- return 0;
- }
-
- if (!drv->bdrv_snapshot_create) {
- if (bs->file != NULL) {
- return bdrv_can_snapshot(bs->file->bs);
- }
- return 0;
- }
-
- return 1;
-}
-
-int bdrv_snapshot_create(BlockDriverState *bs,
- QEMUSnapshotInfo *sn_info)
-{
- BlockDriver *drv = bs->drv;
- if (!drv) {
- return -ENOMEDIUM;
- }
- if (drv->bdrv_snapshot_create) {
- return drv->bdrv_snapshot_create(bs, sn_info);
- }
- if (bs->file) {
- return bdrv_snapshot_create(bs->file->bs, sn_info);
- }
- return -ENOTSUP;
-}
-
-int bdrv_snapshot_goto(BlockDriverState *bs,
- const char *snapshot_id)
-{
- BlockDriver *drv = bs->drv;
- int ret, open_ret;
-
- if (!drv) {
- return -ENOMEDIUM;
- }
- if (drv->bdrv_snapshot_goto) {
- return drv->bdrv_snapshot_goto(bs, snapshot_id);
- }
-
- if (bs->file) {
- drv->bdrv_close(bs);
- ret = bdrv_snapshot_goto(bs->file->bs, snapshot_id);
- open_ret = drv->bdrv_open(bs, NULL, bs->open_flags, NULL);
- if (open_ret < 0) {
- bdrv_unref(bs->file->bs);
- bs->drv = NULL;
- return open_ret;
- }
- return ret;
- }
-
- return -ENOTSUP;
-}
-
-/**
- * Delete an internal snapshot by @snapshot_id and @name.
- * @bs: block device used in the operation
- * @snapshot_id: unique snapshot ID, or NULL
- * @name: snapshot name, or NULL
- * @errp: location to store error
- *
- * If both @snapshot_id and @name are specified, delete the first one with
- * id @snapshot_id and name @name.
- * If only @snapshot_id is specified, delete the first one with id
- * @snapshot_id.
- * If only @name is specified, delete the first one with name @name.
- * if none is specified, return -EINVAL.
- *
- * Returns: 0 on success, -errno on failure. If @bs is not inserted, return
- * -ENOMEDIUM. If @snapshot_id and @name are both NULL, return -EINVAL. If @bs
- * does not support internal snapshot deletion, return -ENOTSUP. If @bs does
- * not support parameter @snapshot_id or @name, or one of them is not correctly
- * specified, return -EINVAL. If @bs can't find one matching @id and @name,
- * return -ENOENT. If @errp != NULL, it will always be filled with error
- * message on failure.
- */
-int bdrv_snapshot_delete(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp)
-{
- BlockDriver *drv = bs->drv;
- int ret;
-
- if (!drv) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
- return -ENOMEDIUM;
- }
- if (!snapshot_id && !name) {
- error_setg(errp, "snapshot_id and name are both NULL");
- return -EINVAL;
- }
-
- /* drain all pending i/o before deleting snapshot */
- bdrv_drained_begin(bs);
-
- if (drv->bdrv_snapshot_delete) {
- ret = drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp);
- } else if (bs->file) {
- ret = bdrv_snapshot_delete(bs->file->bs, snapshot_id, name, errp);
- } else {
- error_setg(errp, "Block format '%s' used by device '%s' "
- "does not support internal snapshot deletion",
- drv->format_name, bdrv_get_device_name(bs));
- ret = -ENOTSUP;
- }
-
- bdrv_drained_end(bs);
- return ret;
-}
-
-int bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs,
- const char *id_or_name,
- Error **errp)
-{
- int ret;
- Error *local_err = NULL;
-
- ret = bdrv_snapshot_delete(bs, id_or_name, NULL, &local_err);
- if (ret == -ENOENT || ret == -EINVAL) {
- error_free(local_err);
- local_err = NULL;
- ret = bdrv_snapshot_delete(bs, NULL, id_or_name, &local_err);
- }
-
- if (ret < 0) {
- error_propagate(errp, local_err);
- }
- return ret;
-}
-
-int bdrv_snapshot_list(BlockDriverState *bs,
- QEMUSnapshotInfo **psn_info)
-{
- BlockDriver *drv = bs->drv;
- if (!drv) {
- return -ENOMEDIUM;
- }
- if (drv->bdrv_snapshot_list) {
- return drv->bdrv_snapshot_list(bs, psn_info);
- }
- if (bs->file) {
- return bdrv_snapshot_list(bs->file->bs, psn_info);
- }
- return -ENOTSUP;
-}
-
-/**
- * Temporarily load an internal snapshot by @snapshot_id and @name.
- * @bs: block device used in the operation
- * @snapshot_id: unique snapshot ID, or NULL
- * @name: snapshot name, or NULL
- * @errp: location to store error
- *
- * If both @snapshot_id and @name are specified, load the first one with
- * id @snapshot_id and name @name.
- * If only @snapshot_id is specified, load the first one with id
- * @snapshot_id.
- * If only @name is specified, load the first one with name @name.
- * if none is specified, return -EINVAL.
- *
- * Returns: 0 on success, -errno on fail. If @bs is not inserted, return
- * -ENOMEDIUM. If @bs is not readonly, return -EINVAL. If @bs did not support
- * internal snapshot, return -ENOTSUP. If qemu can't find a matching @id and
- * @name, return -ENOENT. If @errp != NULL, it will always be filled on
- * failure.
- */
-int bdrv_snapshot_load_tmp(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp)
-{
- BlockDriver *drv = bs->drv;
-
- if (!drv) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
- return -ENOMEDIUM;
- }
- if (!snapshot_id && !name) {
- error_setg(errp, "snapshot_id and name are both NULL");
- return -EINVAL;
- }
- if (!bs->read_only) {
- error_setg(errp, "Device is not readonly");
- return -EINVAL;
- }
- if (drv->bdrv_snapshot_load_tmp) {
- return drv->bdrv_snapshot_load_tmp(bs, snapshot_id, name, errp);
- }
- error_setg(errp, "Block format '%s' used by device '%s' "
- "does not support temporarily loading internal snapshots",
- drv->format_name, bdrv_get_device_name(bs));
- return -ENOTSUP;
-}
-
-int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
- const char *id_or_name,
- Error **errp)
-{
- int ret;
- Error *local_err = NULL;
-
- ret = bdrv_snapshot_load_tmp(bs, id_or_name, NULL, &local_err);
- if (ret == -ENOENT || ret == -EINVAL) {
- error_free(local_err);
- local_err = NULL;
- ret = bdrv_snapshot_load_tmp(bs, NULL, id_or_name, &local_err);
- }
-
- if (local_err) {
- error_propagate(errp, local_err);
- }
-
- return ret;
-}
-
-
-/* Group operations. All block drivers are involved.
- * These functions will properly handle dataplane (take aio_context_acquire
- * when appropriate for appropriate block drivers) */
-
-bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs)
-{
- bool ok = true;
- BlockDriverState *bs = NULL;
-
- while (ok && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- if (bdrv_is_inserted(bs) && !bdrv_is_read_only(bs)) {
- ok = bdrv_can_snapshot(bs);
- }
- aio_context_release(ctx);
- }
-
- *first_bad_bs = bs;
- return ok;
-}
-
-int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs,
- Error **err)
-{
- int ret = 0;
- BlockDriverState *bs = NULL;
- QEMUSnapshotInfo sn1, *snapshot = &sn1;
-
- while (ret == 0 && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- if (bdrv_can_snapshot(bs) &&
- bdrv_snapshot_find(bs, snapshot, name) >= 0) {
- ret = bdrv_snapshot_delete_by_id_or_name(bs, name, err);
- }
- aio_context_release(ctx);
- }
-
- *first_bad_bs = bs;
- return ret;
-}
-
-
-int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
-{
- int err = 0;
- BlockDriverState *bs = NULL;
-
- while (err == 0 && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- if (bdrv_can_snapshot(bs)) {
- err = bdrv_snapshot_goto(bs, name);
- }
- aio_context_release(ctx);
- }
-
- *first_bad_bs = bs;
- return err;
-}
-
-int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
-{
- QEMUSnapshotInfo sn;
- int err = 0;
- BlockDriverState *bs = NULL;
-
- while (err == 0 && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- if (bdrv_can_snapshot(bs)) {
- err = bdrv_snapshot_find(bs, &sn, name);
- }
- aio_context_release(ctx);
- }
-
- *first_bad_bs = bs;
- return err;
-}
-
-int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
- BlockDriverState *vm_state_bs,
- uint64_t vm_state_size,
- BlockDriverState **first_bad_bs)
-{
- int err = 0;
- BlockDriverState *bs = NULL;
-
- while (err == 0 && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- if (bs == vm_state_bs) {
- sn->vm_state_size = vm_state_size;
- err = bdrv_snapshot_create(bs, sn);
- } else if (bdrv_can_snapshot(bs)) {
- sn->vm_state_size = 0;
- err = bdrv_snapshot_create(bs, sn);
- }
- aio_context_release(ctx);
- }
-
- *first_bad_bs = bs;
- return err;
-}
-
-BlockDriverState *bdrv_all_find_vmstate_bs(void)
-{
- bool not_found = true;
- BlockDriverState *bs = NULL;
-
- while (not_found && (bs = bdrv_next(bs))) {
- AioContext *ctx = bdrv_get_aio_context(bs);
-
- aio_context_acquire(ctx);
- not_found = !bdrv_can_snapshot(bs);
- aio_context_release(ctx);
- }
- return bs;
-}