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Block layer patches

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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Tue 28 Feb 2017 20:35:32 GMT
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (46 commits)
  block: Add Error parameter to bdrv_append()
  block: Add Error parameter to bdrv_set_backing_hd()
  block: Assertions for resize permission
  block: Assertions for write permissions
  block: Pass BdrvChild to bdrv_aligned_preadv/pwritev and copy-on-read
  tests: Remove FIXME comments
  nbd/server: Use real permissions for NBD exports
  migration/block: Use real permissions
  hmp: Request permissions in qemu-io
  commit: Add filter-node-name to block-commit
  mirror: Add filter-node-name to blockdev-mirror
  stream: Use real permissions in streaming block job
  mirror: Use real permissions in mirror/active commit block job
  blockjob: Factor out block_job_remove_all_bdrv()
  block: Allow backing file links in change_parent_backing_link()
  block: BdrvChildRole.attach/detach() callbacks
  block: Fix pending requests check in bdrv_append()
  backup: Use real permissions in backup block job
  commit: Use real permissions for HMP 'commit'
  commit: Use real permissions in commit block job
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-03-01 23:09:46 +00:00
commit b9fe31392b
71 changed files with 2039 additions and 392 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

583
block.c
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@ -707,6 +707,12 @@ int bdrv_parse_cache_mode(const char *mode, int *flags, bool *writethrough)
return 0;
}
static char *bdrv_child_get_parent_desc(BdrvChild *c)
{
BlockDriverState *parent = c->opaque;
return g_strdup(bdrv_get_device_or_node_name(parent));
}
static void bdrv_child_cb_drained_begin(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
@ -774,6 +780,7 @@ static void bdrv_inherited_options(int *child_flags, QDict *child_options,
}
const BdrvChildRole child_file = {
.get_parent_desc = bdrv_child_get_parent_desc,
.inherit_options = bdrv_inherited_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
@ -794,11 +801,63 @@ static void bdrv_inherited_fmt_options(int *child_flags, QDict *child_options,
}
const BdrvChildRole child_format = {
.get_parent_desc = bdrv_child_get_parent_desc,
.inherit_options = bdrv_inherited_fmt_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
};
static void bdrv_backing_attach(BdrvChild *c)
{
BlockDriverState *parent = c->opaque;
BlockDriverState *backing_hd = c->bs;
assert(!parent->backing_blocker);
error_setg(&parent->backing_blocker,
"node is used as backing hd of '%s'",
bdrv_get_device_or_node_name(parent));
parent->open_flags &= ~BDRV_O_NO_BACKING;
pstrcpy(parent->backing_file, sizeof(parent->backing_file),
backing_hd->filename);
pstrcpy(parent->backing_format, sizeof(parent->backing_format),
backing_hd->drv ? backing_hd->drv->format_name : "");
bdrv_op_block_all(backing_hd, parent->backing_blocker);
/* Otherwise we won't be able to commit or stream */
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_COMMIT_TARGET,
parent->backing_blocker);
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_STREAM,
parent->backing_blocker);
/*
* We do backup in 3 ways:
* 1. drive backup
* The target bs is new opened, and the source is top BDS
* 2. blockdev backup
* Both the source and the target are top BDSes.
* 3. internal backup(used for block replication)
* Both the source and the target are backing file
*
* In case 1 and 2, neither the source nor the target is the backing file.
* In case 3, we will block the top BDS, so there is only one block job
* for the top BDS and its backing chain.
*/
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_SOURCE,
parent->backing_blocker);
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_TARGET,
parent->backing_blocker);
}
static void bdrv_backing_detach(BdrvChild *c)
{
BlockDriverState *parent = c->opaque;
assert(parent->backing_blocker);
bdrv_op_unblock_all(c->bs, parent->backing_blocker);
error_free(parent->backing_blocker);
parent->backing_blocker = NULL;
}
/*
* Returns the options and flags that bs->backing should get, based on the
* given options and flags for the parent BDS
@ -823,7 +882,10 @@ static void bdrv_backing_options(int *child_flags, QDict *child_options,
*child_flags = flags;
}
static const BdrvChildRole child_backing = {
const BdrvChildRole child_backing = {
.get_parent_desc = bdrv_child_get_parent_desc,
.attach = bdrv_backing_attach,
.detach = bdrv_backing_detach,
.inherit_options = bdrv_backing_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_end = bdrv_child_cb_drained_end,
@ -1326,15 +1388,352 @@ static int bdrv_fill_options(QDict **options, const char *filename,
return 0;
}
static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs)
/*
* Check whether permissions on this node can be changed in a way that
* @cumulative_perms and @cumulative_shared_perms are the new cumulative
* permissions of all its parents. This involves checking whether all necessary
* permission changes to child nodes can be performed.
*
* A call to this function must always be followed by a call to bdrv_set_perm()
* or bdrv_abort_perm_update().
*/
static int bdrv_check_perm(BlockDriverState *bs, uint64_t cumulative_perms,
uint64_t cumulative_shared_perms, Error **errp)
{
BlockDriver *drv = bs->drv;
BdrvChild *c;
int ret;
/* Write permissions never work with read-only images */
if ((cumulative_perms & (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED)) &&
bdrv_is_read_only(bs))
{
error_setg(errp, "Block node is read-only");
return -EPERM;
}
/* Check this node */
if (!drv) {
return 0;
}
if (drv->bdrv_check_perm) {
return drv->bdrv_check_perm(bs, cumulative_perms,
cumulative_shared_perms, errp);
}
/* Drivers that never have children can omit .bdrv_child_perm() */
if (!drv->bdrv_child_perm) {
assert(QLIST_EMPTY(&bs->children));
return 0;
}
/* Check all children */
QLIST_FOREACH(c, &bs->children, next) {
uint64_t cur_perm, cur_shared;
drv->bdrv_child_perm(bs, c, c->role,
cumulative_perms, cumulative_shared_perms,
&cur_perm, &cur_shared);
ret = bdrv_child_check_perm(c, cur_perm, cur_shared, errp);
if (ret < 0) {
return ret;
}
}
return 0;
}
/*
* Notifies drivers that after a previous bdrv_check_perm() call, the
* permission update is not performed and any preparations made for it (e.g.
* taken file locks) need to be undone.
*
* This function recursively notifies all child nodes.
*/
static void bdrv_abort_perm_update(BlockDriverState *bs)
{
BlockDriver *drv = bs->drv;
BdrvChild *c;
if (!drv) {
return;
}
if (drv->bdrv_abort_perm_update) {
drv->bdrv_abort_perm_update(bs);
}
QLIST_FOREACH(c, &bs->children, next) {
bdrv_child_abort_perm_update(c);
}
}
static void bdrv_set_perm(BlockDriverState *bs, uint64_t cumulative_perms,
uint64_t cumulative_shared_perms)
{
BlockDriver *drv = bs->drv;
BdrvChild *c;
if (!drv) {
return;
}
/* Update this node */
if (drv->bdrv_set_perm) {
drv->bdrv_set_perm(bs, cumulative_perms, cumulative_shared_perms);
}
/* Drivers that never have children can omit .bdrv_child_perm() */
if (!drv->bdrv_child_perm) {
assert(QLIST_EMPTY(&bs->children));
return;
}
/* Update all children */
QLIST_FOREACH(c, &bs->children, next) {
uint64_t cur_perm, cur_shared;
drv->bdrv_child_perm(bs, c, c->role,
cumulative_perms, cumulative_shared_perms,
&cur_perm, &cur_shared);
bdrv_child_set_perm(c, cur_perm, cur_shared);
}
}
static void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm,
uint64_t *shared_perm)
{
BdrvChild *c;
uint64_t cumulative_perms = 0;
uint64_t cumulative_shared_perms = BLK_PERM_ALL;
QLIST_FOREACH(c, &bs->parents, next_parent) {
cumulative_perms |= c->perm;
cumulative_shared_perms &= c->shared_perm;
}
*perm = cumulative_perms;
*shared_perm = cumulative_shared_perms;
}
static char *bdrv_child_user_desc(BdrvChild *c)
{
if (c->role->get_parent_desc) {
return c->role->get_parent_desc(c);
}
return g_strdup("another user");
}
static char *bdrv_perm_names(uint64_t perm)
{
struct perm_name {
uint64_t perm;
const char *name;
} permissions[] = {
{ BLK_PERM_CONSISTENT_READ, "consistent read" },
{ BLK_PERM_WRITE, "write" },
{ BLK_PERM_WRITE_UNCHANGED, "write unchanged" },
{ BLK_PERM_RESIZE, "resize" },
{ BLK_PERM_GRAPH_MOD, "change children" },
{ 0, NULL }
};
char *result = g_strdup("");
struct perm_name *p;
for (p = permissions; p->name; p++) {
if (perm & p->perm) {
char *old = result;
result = g_strdup_printf("%s%s%s", old, *old ? ", " : "", p->name);
g_free(old);
}
}
return result;
}
/*
* Checks whether a new reference to @bs can be added if the new user requires
* @new_used_perm/@new_shared_perm as its permissions. If @ignore_child is set,
* this old reference is ignored in the calculations; this allows checking
* permission updates for an existing reference.
*
* Needs to be followed by a call to either bdrv_set_perm() or
* bdrv_abort_perm_update(). */
static int bdrv_check_update_perm(BlockDriverState *bs, uint64_t new_used_perm,
uint64_t new_shared_perm,
BdrvChild *ignore_child, Error **errp)
{
BdrvChild *c;
uint64_t cumulative_perms = new_used_perm;
uint64_t cumulative_shared_perms = new_shared_perm;
/* There is no reason why anyone couldn't tolerate write_unchanged */
assert(new_shared_perm & BLK_PERM_WRITE_UNCHANGED);
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c == ignore_child) {
continue;
}
if ((new_used_perm & c->shared_perm) != new_used_perm) {
char *user = bdrv_child_user_desc(c);
char *perm_names = bdrv_perm_names(new_used_perm & ~c->shared_perm);
error_setg(errp, "Conflicts with use by %s as '%s', which does not "
"allow '%s' on %s",
user, c->name, perm_names, bdrv_get_node_name(c->bs));
g_free(user);
g_free(perm_names);
return -EPERM;
}
if ((c->perm & new_shared_perm) != c->perm) {
char *user = bdrv_child_user_desc(c);
char *perm_names = bdrv_perm_names(c->perm & ~new_shared_perm);
error_setg(errp, "Conflicts with use by %s as '%s', which uses "
"'%s' on %s",
user, c->name, perm_names, bdrv_get_node_name(c->bs));
g_free(user);
g_free(perm_names);
return -EPERM;
}
cumulative_perms |= c->perm;
cumulative_shared_perms &= c->shared_perm;
}
return bdrv_check_perm(bs, cumulative_perms, cumulative_shared_perms, errp);
}
/* Needs to be followed by a call to either bdrv_child_set_perm() or
* bdrv_child_abort_perm_update(). */
int bdrv_child_check_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp)
{
return bdrv_check_update_perm(c->bs, perm, shared, c, errp);
}
void bdrv_child_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared)
{
uint64_t cumulative_perms, cumulative_shared_perms;
c->perm = perm;
c->shared_perm = shared;
bdrv_get_cumulative_perm(c->bs, &cumulative_perms,
&cumulative_shared_perms);
bdrv_set_perm(c->bs, cumulative_perms, cumulative_shared_perms);
}
void bdrv_child_abort_perm_update(BdrvChild *c)
{
bdrv_abort_perm_update(c->bs);
}
int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp)
{
int ret;
ret = bdrv_child_check_perm(c, perm, shared, errp);
if (ret < 0) {
bdrv_child_abort_perm_update(c);
return ret;
}
bdrv_child_set_perm(c, perm, shared);
return 0;
}
#define DEFAULT_PERM_PASSTHROUGH (BLK_PERM_CONSISTENT_READ \
| BLK_PERM_WRITE \
| BLK_PERM_WRITE_UNCHANGED \
| BLK_PERM_RESIZE)
#define DEFAULT_PERM_UNCHANGED (BLK_PERM_ALL & ~DEFAULT_PERM_PASSTHROUGH)
void bdrv_filter_default_perms(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
if (c == NULL) {
*nperm = perm & DEFAULT_PERM_PASSTHROUGH;
*nshared = (shared & DEFAULT_PERM_PASSTHROUGH) | DEFAULT_PERM_UNCHANGED;
return;
}
*nperm = (perm & DEFAULT_PERM_PASSTHROUGH) |
(c->perm & DEFAULT_PERM_UNCHANGED);
*nshared = (shared & DEFAULT_PERM_PASSTHROUGH) |
(c->shared_perm & DEFAULT_PERM_UNCHANGED);
}
void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
bool backing = (role == &child_backing);
assert(role == &child_backing || role == &child_file);
if (!backing) {
/* Apart from the modifications below, the same permissions are
* forwarded and left alone as for filters */
bdrv_filter_default_perms(bs, c, role, perm, shared, &perm, &shared);
/* Format drivers may touch metadata even if the guest doesn't write */
if (!bdrv_is_read_only(bs)) {
perm |= BLK_PERM_WRITE | BLK_PERM_RESIZE;
}
/* bs->file always needs to be consistent because of the metadata. We
* can never allow other users to resize or write to it. */
perm |= BLK_PERM_CONSISTENT_READ;
shared &= ~(BLK_PERM_WRITE | BLK_PERM_RESIZE);
} else {
/* We want consistent read from backing files if the parent needs it.
* No other operations are performed on backing files. */
perm &= BLK_PERM_CONSISTENT_READ;
/* If the parent can deal with changing data, we're okay with a
* writable and resizable backing file. */
/* TODO Require !(perm & BLK_PERM_CONSISTENT_READ), too? */
if (shared & BLK_PERM_WRITE) {
shared = BLK_PERM_WRITE | BLK_PERM_RESIZE;
} else {
shared = 0;
}
shared |= BLK_PERM_CONSISTENT_READ | BLK_PERM_GRAPH_MOD |
BLK_PERM_WRITE_UNCHANGED;
}
*nperm = perm;
*nshared = shared;
}
static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs,
bool check_new_perm)
{
BlockDriverState *old_bs = child->bs;
uint64_t perm, shared_perm;
if (old_bs) {
if (old_bs->quiesce_counter && child->role->drained_end) {
child->role->drained_end(child);
}
if (child->role->detach) {
child->role->detach(child);
}
QLIST_REMOVE(child, next_parent);
/* Update permissions for old node. This is guaranteed to succeed
* because we're just taking a parent away, so we're loosening
* restrictions. */
bdrv_get_cumulative_perm(old_bs, &perm, &shared_perm);
bdrv_check_perm(old_bs, perm, shared_perm, &error_abort);
bdrv_set_perm(old_bs, perm, shared_perm);
}
child->bs = new_bs;
@ -1344,23 +1743,46 @@ static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs)
if (new_bs->quiesce_counter && child->role->drained_begin) {
child->role->drained_begin(child);
}
bdrv_get_cumulative_perm(new_bs, &perm, &shared_perm);
if (check_new_perm) {
bdrv_check_perm(new_bs, perm, shared_perm, &error_abort);
}
bdrv_set_perm(new_bs, perm, shared_perm);
if (child->role->attach) {
child->role->attach(child);
}
}
}
BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role,
void *opaque)
uint64_t perm, uint64_t shared_perm,
void *opaque, Error **errp)
{
BdrvChild *child = g_new(BdrvChild, 1);
BdrvChild *child;
int ret;
ret = bdrv_check_update_perm(child_bs, perm, shared_perm, NULL, errp);
if (ret < 0) {
bdrv_abort_perm_update(child_bs);
return NULL;
}
child = g_new(BdrvChild, 1);
*child = (BdrvChild) {
.bs = NULL,
.name = g_strdup(child_name),
.role = child_role,
.opaque = opaque,
.bs = NULL,
.name = g_strdup(child_name),
.role = child_role,
.perm = perm,
.shared_perm = shared_perm,
.opaque = opaque,
};
bdrv_replace_child(child, child_bs);
/* This performs the matching bdrv_set_perm() for the above check. */
bdrv_replace_child(child, child_bs, false);
return child;
}
@ -1368,10 +1790,24 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role)
const BdrvChildRole *child_role,
Error **errp)
{
BdrvChild *child = bdrv_root_attach_child(child_bs, child_name, child_role,
parent_bs);
BdrvChild *child;
uint64_t perm, shared_perm;
bdrv_get_cumulative_perm(parent_bs, &perm, &shared_perm);
assert(parent_bs->drv);
parent_bs->drv->bdrv_child_perm(parent_bs, NULL, child_role,
perm, shared_perm, &perm, &shared_perm);
child = bdrv_root_attach_child(child_bs, child_name, child_role,
perm, shared_perm, parent_bs, errp);
if (child == NULL) {
return NULL;
}
QLIST_INSERT_HEAD(&parent_bs->children, child, next);
return child;
}
@ -1383,7 +1819,7 @@ static void bdrv_detach_child(BdrvChild *child)
child->next.le_prev = NULL;
}
bdrv_replace_child(child, NULL);
bdrv_replace_child(child, NULL, false);
g_free(child->name);
g_free(child);
@ -1447,57 +1883,28 @@ static void bdrv_parent_cb_resize(BlockDriverState *bs)
* Sets the backing file link of a BDS. A new reference is created; callers
* which don't need their own reference any more must call bdrv_unref().
*/
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd)
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd,
Error **errp)
{
if (backing_hd) {
bdrv_ref(backing_hd);
}
if (bs->backing) {
assert(bs->backing_blocker);
bdrv_op_unblock_all(bs->backing->bs, bs->backing_blocker);
bdrv_unref_child(bs, bs->backing);
} else if (backing_hd) {
error_setg(&bs->backing_blocker,
"node is used as backing hd of '%s'",
bdrv_get_device_or_node_name(bs));
}
if (!backing_hd) {
error_free(bs->backing_blocker);
bs->backing_blocker = NULL;
bs->backing = NULL;
goto out;
}
bs->backing = bdrv_attach_child(bs, backing_hd, "backing", &child_backing);
bs->open_flags &= ~BDRV_O_NO_BACKING;
pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_hd->filename);
pstrcpy(bs->backing_format, sizeof(bs->backing_format),
backing_hd->drv ? backing_hd->drv->format_name : "");
bdrv_op_block_all(backing_hd, bs->backing_blocker);
/* Otherwise we won't be able to commit or stream */
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_COMMIT_TARGET,
bs->backing_blocker);
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_STREAM,
bs->backing_blocker);
/*
* We do backup in 3 ways:
* 1. drive backup
* The target bs is new opened, and the source is top BDS
* 2. blockdev backup
* Both the source and the target are top BDSes.
* 3. internal backup(used for block replication)
* Both the source and the target are backing file
*
* In case 1 and 2, neither the source nor the target is the backing file.
* In case 3, we will block the top BDS, so there is only one block job
* for the top BDS and its backing chain.
*/
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_SOURCE,
bs->backing_blocker);
bdrv_op_unblock(backing_hd, BLOCK_OP_TYPE_BACKUP_TARGET,
bs->backing_blocker);
bs->backing = bdrv_attach_child(bs, backing_hd, "backing", &child_backing,
errp);
if (!bs->backing) {
bdrv_unref(backing_hd);
}
out:
bdrv_refresh_limits(bs, NULL);
}
@ -1580,8 +1987,12 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
/* Hook up the backing file link; drop our reference, bs owns the
* backing_hd reference now */
bdrv_set_backing_hd(bs, backing_hd);
bdrv_set_backing_hd(bs, backing_hd, &local_err);
bdrv_unref(backing_hd);
if (local_err) {
ret = -EINVAL;
goto free_exit;
}
qdict_del(parent_options, bdref_key);
@ -1648,6 +2059,7 @@ BdrvChild *bdrv_open_child(const char *filename,
const BdrvChildRole *child_role,
bool allow_none, Error **errp)
{
BdrvChild *c;
BlockDriverState *bs;
bs = bdrv_open_child_bs(filename, options, bdref_key, parent, child_role,
@ -1656,7 +2068,13 @@ BdrvChild *bdrv_open_child(const char *filename,
return NULL;
}
return bdrv_attach_child(parent, bs, bdref_key, child_role);
c = bdrv_attach_child(parent, bs, bdref_key, child_role, errp);
if (!c) {
bdrv_unref(bs);
return NULL;
}
return c;
}
static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
@ -1669,6 +2087,7 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
int64_t total_size;
QemuOpts *opts = NULL;
BlockDriverState *bs_snapshot;
Error *local_err = NULL;
int ret;
/* if snapshot, we create a temporary backing file and open it
@ -1718,7 +2137,12 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
* call bdrv_unref() on it), so in order to be able to return one, we have
* to increase bs_snapshot's refcount here */
bdrv_ref(bs_snapshot);
bdrv_append(bs_snapshot, bs);
bdrv_append(bs_snapshot, bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto out;
}
g_free(tmp_filename);
return bs_snapshot;
@ -1862,9 +2286,12 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
goto fail;
}
if (file_bs != NULL) {
file = blk_new();
blk_insert_bs(file, file_bs);
file = blk_new(BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL);
blk_insert_bs(file, file_bs, &local_err);
bdrv_unref(file_bs);
if (local_err) {
goto fail;
}
qdict_put(options, "file",
qstring_from_str(bdrv_get_node_name(file_bs)));
@ -2405,7 +2832,7 @@ static void bdrv_close(BlockDriverState *bs)
bs->drv->bdrv_close(bs);
bs->drv = NULL;
bdrv_set_backing_hd(bs, NULL);
bdrv_set_backing_hd(bs, NULL, &error_abort);
if (bs->file != NULL) {
bdrv_unref_child(bs, bs->file);
@ -2465,10 +2892,13 @@ static void change_parent_backing_link(BlockDriverState *from,
BdrvChild *c, *next, *to_c;
QLIST_FOREACH_SAFE(c, &from->parents, next_parent, next) {
if (c->role->stay_at_node) {
continue;
}
if (c->role == &child_backing) {
/* @from is generally not allowed to be a backing file, except for
* when @to is the overlay. In that case, @from may not be replaced
* by @to as @to's backing node. */
/* If @from is a backing file of @to, ignore the child to avoid
* creating a loop. We only want to change the pointer of other
* parents. */
QLIST_FOREACH(to_c, &to->children, next) {
if (to_c == c) {
break;
@ -2479,9 +2909,10 @@ static void change_parent_backing_link(BlockDriverState *from,
}
}
assert(c->role != &child_backing);
bdrv_ref(to);
bdrv_replace_child(c, to);
/* FIXME Are we sure that bdrv_replace_child() can't run into
* &error_abort because of permissions? */
bdrv_replace_child(c, to, true);
bdrv_unref(from);
}
}
@ -2502,19 +2933,25 @@ static void change_parent_backing_link(BlockDriverState *from,
* parents of bs_top after bdrv_append() returns. If the caller needs to keep a
* reference of its own, it must call bdrv_ref().
*/
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top)
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top,
Error **errp)
{
assert(!bdrv_requests_pending(bs_top));
assert(!bdrv_requests_pending(bs_new));
Error *local_err = NULL;
bdrv_ref(bs_top);
assert(!atomic_read(&bs_top->in_flight));
assert(!atomic_read(&bs_new->in_flight));
bdrv_set_backing_hd(bs_new, bs_top, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto out;
}
change_parent_backing_link(bs_top, bs_new);
bdrv_set_backing_hd(bs_new, bs_top);
bdrv_unref(bs_top);
/* bs_new is now referenced by its new parents, we don't need the
* additional reference any more. */
out:
bdrv_unref(bs_new);
}
@ -2658,6 +3095,7 @@ int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
BlockDriverState *base, const char *backing_file_str)
{
BlockDriverState *new_top_bs = NULL;
Error *local_err = NULL;
int ret = -EIO;
if (!top->drv || !base->drv) {
@ -2690,7 +3128,13 @@ int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
if (ret) {
goto exit;
}
bdrv_set_backing_hd(new_top_bs, base);
bdrv_set_backing_hd(new_top_bs, base, &local_err);
if (local_err) {
ret = -EPERM;
error_report_err(local_err);
goto exit;
}
ret = 0;
exit:
@ -2705,6 +3149,9 @@ int bdrv_truncate(BdrvChild *child, int64_t offset)
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;
int ret;
assert(child->perm & BLK_PERM_RESIZE);
if (!drv)
return -ENOMEDIUM;
if (!drv->bdrv_truncate)

22
block/backup.c
View File

@ -618,14 +618,24 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
goto error;
}
job = block_job_create(job_id, &backup_job_driver, bs, speed,
creation_flags, cb, opaque, errp);
/* job->common.len is fixed, so we can't allow resize */
job = block_job_create(job_id, &backup_job_driver, bs,
BLK_PERM_CONSISTENT_READ,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD,
speed, creation_flags, cb, opaque, errp);
if (!job) {
goto error;
}
job->target = blk_new();
blk_insert_bs(job->target, target);
/* The target must match the source in size, so no resize here either */
job->target = blk_new(BLK_PERM_WRITE,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD);
ret = blk_insert_bs(job->target, target, errp);
if (ret < 0) {
goto error;
}
job->on_source_error = on_source_error;
job->on_target_error = on_target_error;
@ -652,7 +662,9 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
job->cluster_size = MAX(BACKUP_CLUSTER_SIZE_DEFAULT, bdi.cluster_size);
}
block_job_add_bdrv(&job->common, target);
/* Required permissions are already taken with target's blk_new() */
block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
&error_abort);
job->common.len = len;
block_job_txn_add_job(txn, &job->common);

2
block/blkdebug.c
View File

@ -734,6 +734,8 @@ static BlockDriver bdrv_blkdebug = {
.bdrv_file_open = blkdebug_open,
.bdrv_close = blkdebug_close,
.bdrv_reopen_prepare = blkdebug_reopen_prepare,
.bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_getlength = blkdebug_getlength,
.bdrv_truncate = blkdebug_truncate,
.bdrv_refresh_filename = blkdebug_refresh_filename,

1
block/blkreplay.c
View File

@ -137,6 +137,7 @@ static BlockDriver bdrv_blkreplay = {
.bdrv_file_open = blkreplay_open,
.bdrv_close = blkreplay_close,
.bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_getlength = blkreplay_getlength,
.bdrv_co_preadv = blkreplay_co_preadv,

1
block/blkverify.c
View File

@ -320,6 +320,7 @@ static BlockDriver bdrv_blkverify = {
.bdrv_parse_filename = blkverify_parse_filename,
.bdrv_file_open = blkverify_open,
.bdrv_close = blkverify_close,
.bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_getlength = blkverify_getlength,
.bdrv_refresh_filename = blkverify_refresh_filename,

116
block/block-backend.c
View File

@ -59,6 +59,9 @@ struct BlockBackend {
bool iostatus_enabled;
BlockDeviceIoStatus iostatus;
uint64_t perm;
uint64_t shared_perm;
bool allow_write_beyond_eof;
NotifierList remove_bs_notifiers, insert_bs_notifiers;
@ -77,6 +80,7 @@ static const AIOCBInfo block_backend_aiocb_info = {
static void drive_info_del(DriveInfo *dinfo);
static BlockBackend *bdrv_first_blk(BlockDriverState *bs);
static char *blk_get_attached_dev_id(BlockBackend *blk);
/* All BlockBackends */
static QTAILQ_HEAD(, BlockBackend) block_backends =
@ -99,6 +103,25 @@ static void blk_root_drained_end(BdrvChild *child);
static void blk_root_change_media(BdrvChild *child, bool load);
static void blk_root_resize(BdrvChild *child);
static char *blk_root_get_parent_desc(BdrvChild *child)
{
BlockBackend *blk = child->opaque;
char *dev_id;
if (blk->name) {
return g_strdup(blk->name);
}
dev_id = blk_get_attached_dev_id(blk);
if (*dev_id) {
return dev_id;
} else {
/* TODO Callback into the BB owner for something more detailed */
g_free(dev_id);
return g_strdup("a block device");
}
}
static const char *blk_root_get_name(BdrvChild *child)
{
return blk_name(child->opaque);
@ -110,6 +133,7 @@ static const BdrvChildRole child_root = {
.change_media = blk_root_change_media,
.resize = blk_root_resize,
.get_name = blk_root_get_name,
.get_parent_desc = blk_root_get_parent_desc,
.drained_begin = blk_root_drained_begin,
.drained_end = blk_root_drained_end,
@ -117,15 +141,23 @@ static const BdrvChildRole child_root = {
/*
* Create a new BlockBackend with a reference count of one.
* Store an error through @errp on failure, unless it's null.
*
* @perm is a bitmasks of BLK_PERM_* constants which describes the permissions
* to request for a block driver node that is attached to this BlockBackend.
* @shared_perm is a bitmask which describes which permissions may be granted
* to other users of the attached node.
* Both sets of permissions can be changed later using blk_set_perm().
*
* Return the new BlockBackend on success, null on failure.
*/
BlockBackend *blk_new(void)
BlockBackend *blk_new(uint64_t perm, uint64_t shared_perm)
{
BlockBackend *blk;
blk = g_new0(BlockBackend, 1);
blk->refcnt = 1;
blk->perm = perm;
blk->shared_perm = shared_perm;
blk_set_enable_write_cache(blk, true);
qemu_co_queue_init(&blk->public.throttled_reqs[0]);
@ -155,15 +187,33 @@ BlockBackend *blk_new_open(const char *filename, const char *reference,
{
BlockBackend *blk;
BlockDriverState *bs;
uint64_t perm;
blk = blk_new();
/* blk_new_open() is mainly used in .bdrv_create implementations and the
* tools where sharing isn't a concern because the BDS stays private, so we
* just request permission according to the flags.
*
* The exceptions are xen_disk and blockdev_init(); in these cases, the
* caller of blk_new_open() doesn't make use of the permissions, but they
* shouldn't hurt either. We can still share everything here because the
* guest devices will add their own blockers if they can't share. */
perm = BLK_PERM_CONSISTENT_READ;
if (flags & BDRV_O_RDWR) {
perm |= BLK_PERM_WRITE;
}
if (flags & BDRV_O_RESIZE) {
perm |= BLK_PERM_RESIZE;
}
blk = blk_new(perm, BLK_PERM_ALL);
bs = bdrv_open(filename, reference, options, flags, errp);
if (!bs) {
blk_unref(blk);
return NULL;
}
blk->root = bdrv_root_attach_child(bs, "root", &child_root, blk);
blk->root = bdrv_root_attach_child(bs, "root", &child_root,
perm, BLK_PERM_ALL, blk, &error_abort);
return blk;
}
@ -495,16 +545,49 @@ void blk_remove_bs(BlockBackend *blk)
/*
* Associates a new BlockDriverState with @blk.
*/
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp)
{
blk->root = bdrv_root_attach_child(bs, "root", &child_root,
blk->perm, blk->shared_perm, blk, errp);
if (blk->root == NULL) {
return -EPERM;
}
bdrv_ref(bs);
blk->root = bdrv_root_attach_child(bs, "root", &child_root, blk);
notifier_list_notify(&blk->insert_bs_notifiers, blk);
if (blk->public.throttle_state) {
throttle_timers_attach_aio_context(
&blk->public.throttle_timers, bdrv_get_aio_context(bs));
}
return 0;
}
/*
* Sets the permission bitmasks that the user of the BlockBackend needs.
*/
int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,
Error **errp)
{
int ret;
if (blk->root) {
ret = bdrv_child_try_set_perm(blk->root, perm, shared_perm, errp);
if (ret < 0) {
return ret;
}
}
blk->perm = perm;
blk->shared_perm = shared_perm;
return 0;
}
void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm)
{
*perm = blk->perm;
*shared_perm = blk->shared_perm;
}
static int blk_do_attach_dev(BlockBackend *blk, void *dev)
@ -553,6 +636,7 @@ void blk_detach_dev(BlockBackend *blk, void *dev)
blk->dev_ops = NULL;
blk->dev_opaque = NULL;
blk->guest_block_size = 512;
blk_set_perm(blk, 0, BLK_PERM_ALL, &error_abort);
blk_unref(blk);
}
@ -620,19 +704,29 @@ void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops,
/*
* Notify @blk's attached device model of media change.
* If @load is true, notify of media load.
* Else, notify of media eject.
*
* If @load is true, notify of media load. This action can fail, meaning that
* the medium cannot be loaded. @errp is set then.
*
* If @load is false, notify of media eject. This can never fail.
*
* Also send DEVICE_TRAY_MOVED events as appropriate.
*/
void blk_dev_change_media_cb(BlockBackend *blk, bool load)
void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp)
{
if (blk->dev_ops && blk->dev_ops->change_media_cb) {
bool tray_was_open, tray_is_open;
Error *local_err = NULL;
assert(!blk->legacy_dev);
tray_was_open = blk_dev_is_tray_open(blk);
blk->dev_ops->change_media_cb(blk->dev_opaque, load);
blk->dev_ops->change_media_cb(blk->dev_opaque, load, &local_err);
if (local_err) {
assert(load == true);
error_propagate(errp, local_err);
return;
}
tray_is_open = blk_dev_is_tray_open(blk);
if (tray_was_open != tray_is_open) {
@ -646,7 +740,7 @@ void blk_dev_change_media_cb(BlockBackend *blk, bool load)
static void blk_root_change_media(BdrvChild *child, bool load)
{
blk_dev_change_media_cb(child->opaque, load);
blk_dev_change_media_cb(child->opaque, load, NULL);
}
/*

1
block/bochs.c
View File

@ -293,6 +293,7 @@ static BlockDriver bdrv_bochs = {
.instance_size = sizeof(BDRVBochsState),
.bdrv_probe = bochs_probe,
.bdrv_open = bochs_open,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_refresh_limits = bochs_refresh_limits,
.bdrv_co_preadv = bochs_co_preadv,
.bdrv_close = bochs_close,

1
block/cloop.c
View File

@ -290,6 +290,7 @@ static BlockDriver bdrv_cloop = {
.instance_size = sizeof(BDRVCloopState),
.bdrv_probe = cloop_probe,
.bdrv_open = cloop_open,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_refresh_limits = cloop_refresh_limits,
.bdrv_co_preadv = cloop_co_preadv,
.bdrv_close = cloop_close,

176
block/commit.c
View File

@ -36,6 +36,7 @@ typedef struct CommitBlockJob {
BlockJob common;
RateLimit limit;
BlockDriverState *active;
BlockDriverState *commit_top_bs;
BlockBackend *top;
BlockBackend *base;
BlockdevOnError on_error;
@ -83,12 +84,23 @@ static void commit_complete(BlockJob *job, void *opaque)
BlockDriverState *active = s->active;
BlockDriverState *top = blk_bs(s->top);
BlockDriverState *base = blk_bs(s->base);
BlockDriverState *overlay_bs = bdrv_find_overlay(active, top);
BlockDriverState *overlay_bs = bdrv_find_overlay(active, s->commit_top_bs);
int ret = data->ret;
bool remove_commit_top_bs = false;
/* Remove base node parent that still uses BLK_PERM_WRITE/RESIZE before
* the normal backing chain can be restored. */
blk_unref(s->base);
if (!block_job_is_cancelled(&s->common) && ret == 0) {
/* success */
ret = bdrv_drop_intermediate(active, top, base, s->backing_file_str);
ret = bdrv_drop_intermediate(active, s->commit_top_bs, base,
s->backing_file_str);
} else if (overlay_bs) {
/* XXX Can (or should) we somehow keep 'consistent read' blocked even
* after the failed/cancelled commit job is gone? If we already wrote
* something to base, the intermediate images aren't valid any more. */
remove_commit_top_bs = true;
}
/* restore base open flags here if appropriate (e.g., change the base back
@ -102,9 +114,15 @@ static void commit_complete(BlockJob *job, void *opaque)
}
g_free(s->backing_file_str);
blk_unref(s->top);
blk_unref(s->base);
block_job_completed(&s->common, ret);
g_free(data);
/* If bdrv_drop_intermediate() didn't already do that, remove the commit
* filter driver from the backing chain. Do this as the final step so that
* the 'consistent read' permission can be granted. */
if (remove_commit_top_bs) {
bdrv_set_backing_hd(overlay_bs, top, &error_abort);
}
}
static void coroutine_fn commit_run(void *opaque)
@ -208,10 +226,38 @@ static const BlockJobDriver commit_job_driver = {
.start = commit_run,
};
static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
static void bdrv_commit_top_close(BlockDriverState *bs)
{
}
static void bdrv_commit_top_child_perm(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
*nperm = 0;
*nshared = BLK_PERM_ALL;
}
/* Dummy node that provides consistent read to its users without requiring it
* from its backing file and that allows writes on the backing file chain. */
static BlockDriver bdrv_commit_top = {
.format_name = "commit_top",
.bdrv_co_preadv = bdrv_commit_top_preadv,
.bdrv_close = bdrv_commit_top_close,
.bdrv_child_perm = bdrv_commit_top_child_perm,
};
void commit_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *base, BlockDriverState *top, int64_t speed,
BlockdevOnError on_error, const char *backing_file_str,
Error **errp)
const char *filter_node_name, Error **errp)
{
CommitBlockJob *s;
BlockReopenQueue *reopen_queue = NULL;
@ -219,7 +265,9 @@ void commit_start(const char *job_id, BlockDriverState *bs,
int orig_base_flags;
BlockDriverState *iter;
BlockDriverState *overlay_bs;
BlockDriverState *commit_top_bs = NULL;
Error *local_err = NULL;
int ret;
assert(top != bs);
if (top == base) {
@ -234,8 +282,8 @@ void commit_start(const char *job_id, BlockDriverState *bs,
return;
}
s = block_job_create(job_id, &commit_job_driver, bs, speed,
BLOCK_JOB_DEFAULT, NULL, NULL, errp);
s = block_job_create(job_id, &commit_job_driver, bs, 0, BLK_PERM_ALL,
speed, BLOCK_JOB_DEFAULT, NULL, NULL, errp);
if (!s) {
return;
}
@ -256,30 +304,70 @@ void commit_start(const char *job_id, BlockDriverState *bs,
bdrv_reopen_multiple(bdrv_get_aio_context(bs), reopen_queue, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
block_job_unref(&s->common);
return;
goto fail;
}
}
/* Insert commit_top block node above top, so we can block consistent read
* on the backing chain below it */
commit_top_bs = bdrv_new_open_driver(&bdrv_commit_top, filter_node_name, 0,
errp);
if (commit_top_bs == NULL) {
goto fail;
}
bdrv_set_backing_hd(commit_top_bs, top, &error_abort);
bdrv_set_backing_hd(overlay_bs, commit_top_bs, &error_abort);
s->commit_top_bs = commit_top_bs;
bdrv_unref(commit_top_bs);
/* Block all nodes between top and base, because they will
* disappear from the chain after this operation. */
assert(bdrv_chain_contains(top, base));
for (iter = top; iter != backing_bs(base); iter = backing_bs(iter)) {
block_job_add_bdrv(&s->common, iter);
for (iter = top; iter != base; iter = backing_bs(iter)) {
/* XXX BLK_PERM_WRITE needs to be allowed so we don't block ourselves
* at s->base (if writes are blocked for a node, they are also blocked
* for its backing file). The other options would be a second filter
* driver above s->base. */
ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE,
errp);
if (ret < 0) {
goto fail;
}
}
ret = block_job_add_bdrv(&s->common, "base", base, 0, BLK_PERM_ALL, errp);
if (ret < 0) {
goto fail;
}
/* overlay_bs must be blocked because it needs to be modified to
* update the backing image string, but if it's the root node then
* don't block it again */
if (bs != overlay_bs) {
block_job_add_bdrv(&s->common, overlay_bs);
* update the backing image string. */
ret = block_job_add_bdrv(&s->common, "overlay of top", overlay_bs,
BLK_PERM_GRAPH_MOD, BLK_PERM_ALL, errp);
if (ret < 0) {
goto fail;
}
s->base = blk_new();
blk_insert_bs(s->base, base);
s->base = blk_new(BLK_PERM_CONSISTENT_READ
| BLK_PERM_WRITE
| BLK_PERM_RESIZE,
BLK_PERM_CONSISTENT_READ
| BLK_PERM_GRAPH_MOD
| BLK_PERM_WRITE_UNCHANGED);
ret = blk_insert_bs(s->base, base, errp);
if (ret < 0) {
goto fail;
}
s->top = blk_new();
blk_insert_bs(s->top, top);
/* Required permissions are already taken with block_job_add_bdrv() */
s->top = blk_new(0, BLK_PERM_ALL);
blk_insert_bs(s->top, top, errp);
if (ret < 0) {
goto fail;
}
s->active = bs;
@ -292,6 +380,19 @@ void commit_start(const char *job_id, BlockDriverState *bs,
trace_commit_start(bs, base, top, s);
block_job_start(&s->common);
return;
fail:
if (s->base) {
blk_unref(s->base);
}
if (s->top) {
blk_unref(s->top);
}
if (commit_top_bs) {
bdrv_set_backing_hd(overlay_bs, top, &error_abort);
}
block_job_unref(&s->common);
}
@ -301,11 +402,14 @@ void commit_start(const char *job_id, BlockDriverState *bs,
int bdrv_commit(BlockDriverState *bs)
{
BlockBackend *src, *backing;
BlockDriverState *backing_file_bs = NULL;
BlockDriverState *commit_top_bs = NULL;
BlockDriver *drv = bs->drv;
int64_t sector, total_sectors, length, backing_length;
int n, ro, open_flags;
int ret = 0;
uint8_t *buf = NULL;
Error *local_err = NULL;
if (!drv)
return -ENOMEDIUM;
@ -328,11 +432,33 @@ int bdrv_commit(BlockDriverState *bs)
}
}
src = blk_new();
blk_insert_bs(src, bs);
src = blk_new(BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL);
backing = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL);
backing = blk_new();
blk_insert_bs(backing, bs->backing->bs);
ret = blk_insert_bs(src, bs, &local_err);
if (ret < 0) {
error_report_err(local_err);
goto ro_cleanup;
}
/* Insert commit_top block node above backing, so we can write to it */
backing_file_bs = backing_bs(bs);
commit_top_bs = bdrv_new_open_driver(&bdrv_commit_top, NULL, BDRV_O_RDWR,
&local_err);
if (commit_top_bs == NULL) {
error_report_err(local_err);
goto ro_cleanup;
}
bdrv_set_backing_hd(commit_top_bs, backing_file_bs, &error_abort);
bdrv_set_backing_hd(bs, commit_top_bs, &error_abort);
ret = blk_insert_bs(backing, backing_file_bs, &local_err);
if (ret < 0) {
error_report_err(local_err);
goto ro_cleanup;
}
length = blk_getlength(src);
if (length < 0) {
@ -404,8 +530,12 @@ int bdrv_commit(BlockDriverState *bs)
ro_cleanup:
qemu_vfree(buf);
blk_unref(src);
blk_unref(backing);
if (backing_file_bs) {
bdrv_set_backing_hd(bs, backing_file_bs, &error_abort);
}
bdrv_unref(commit_top_bs);
blk_unref(src);
if (ro) {
/* ignoring error return here */

1
block/crypto.c
View File

@ -628,6 +628,7 @@ BlockDriver bdrv_crypto_luks = {
.bdrv_probe = block_crypto_probe_luks,
.bdrv_open = block_crypto_open_luks,
.bdrv_close = block_crypto_close,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_create = block_crypto_create_luks,
.bdrv_truncate = block_crypto_truncate,
.create_opts = &block_crypto_create_opts_luks,

1
block/dmg.c
View File

@ -697,6 +697,7 @@ static BlockDriver bdrv_dmg = {
.bdrv_probe = dmg_probe,
.bdrv_open = dmg_open,
.bdrv_refresh_limits = dmg_refresh_limits,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_preadv = dmg_co_preadv,
.bdrv_close = dmg_close,
};

41
block/io.c
View File

@ -925,9 +925,11 @@ bdrv_driver_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
return drv->bdrv_co_pwritev_compressed(bs, offset, bytes, qiov);
}
static int coroutine_fn bdrv_co_do_copy_on_readv(BlockDriverState *bs,
static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
int64_t offset, unsigned int bytes, QEMUIOVector *qiov)
{
BlockDriverState *bs = child->bs;
/* Perform I/O through a temporary buffer so that users who scribble over
* their read buffer while the operation is in progress do not end up
* modifying the image file. This is critical for zero-copy guest I/O
@ -943,6 +945,8 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BlockDriverState *bs,
size_t skip_bytes;
int ret;
assert(child->perm & (BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE));
/* Cover entire cluster so no additional backing file I/O is required when
* allocating cluster in the image file.
*/
@ -1001,10 +1005,11 @@ err:
* handles copy on read, zeroing after EOF, and fragmentation of large
* reads; any other features must be implemented by the caller.
*/
static int coroutine_fn bdrv_aligned_preadv(BlockDriverState *bs,
static int coroutine_fn bdrv_aligned_preadv(BdrvChild *child,
BdrvTrackedRequest *req, int64_t offset, unsigned int bytes,
int64_t align, QEMUIOVector *qiov, int flags)
{
BlockDriverState *bs = child->bs;
int64_t total_bytes, max_bytes;
int ret = 0;
uint64_t bytes_remaining = bytes;
@ -1050,7 +1055,7 @@ static int coroutine_fn bdrv_aligned_preadv(BlockDriverState *bs,
}
if (!ret || pnum != nb_sectors) {
ret = bdrv_co_do_copy_on_readv(bs, offset, bytes, qiov);
ret = bdrv_co_do_copy_on_readv(child, offset, bytes, qiov);
goto out;
}
}
@ -1158,7 +1163,7 @@ int coroutine_fn bdrv_co_preadv(BdrvChild *child,
}
tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_READ);
ret = bdrv_aligned_preadv(bs, &req, offset, bytes, align,
ret = bdrv_aligned_preadv(child, &req, offset, bytes, align,
use_local_qiov ? &local_qiov : qiov,
flags);
tracked_request_end(&req);
@ -1306,10 +1311,11 @@ fail:
* Forwards an already correctly aligned write request to the BlockDriver,
* after possibly fragmenting it.
*/
static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
BdrvTrackedRequest *req, int64_t offset, unsigned int bytes,
int64_t align, QEMUIOVector *qiov, int flags)
{
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;
bool waited;
int ret;
@ -1332,6 +1338,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
assert(!waited || !req->serialising);
assert(req->overlap_offset <= offset);
assert(offset + bytes <= req->overlap_offset + req->overlap_bytes);
assert(child->perm & BLK_PERM_WRITE);
assert(end_sector <= bs->total_sectors || child->perm & BLK_PERM_RESIZE);
ret = notifier_with_return_list_notify(&bs->before_write_notifiers, req);
@ -1397,12 +1405,13 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
return ret;
}
static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
static int coroutine_fn bdrv_co_do_zero_pwritev(BdrvChild *child,
int64_t offset,
unsigned int bytes,
BdrvRequestFlags flags,
BdrvTrackedRequest *req)
{
BlockDriverState *bs = child->bs;
uint8_t *buf = NULL;
QEMUIOVector local_qiov;
struct iovec iov;
@ -1430,7 +1439,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
mark_request_serialising(req, align);
wait_serialising_requests(req);
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
ret = bdrv_aligned_preadv(bs, req, offset & ~(align - 1), align,
ret = bdrv_aligned_preadv(child, req, offset & ~(align - 1), align,
align, &local_qiov, 0);
if (ret < 0) {
goto fail;
@ -1438,7 +1447,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_HEAD);
memset(buf + head_padding_bytes, 0, zero_bytes);
ret = bdrv_aligned_pwritev(bs, req, offset & ~(align - 1), align,
ret = bdrv_aligned_pwritev(child, req, offset & ~(align - 1), align,
align, &local_qiov,
flags & ~BDRV_REQ_ZERO_WRITE);
if (ret < 0) {
@ -1452,7 +1461,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
if (bytes >= align) {
/* Write the aligned part in the middle. */
uint64_t aligned_bytes = bytes & ~(align - 1);
ret = bdrv_aligned_pwritev(bs, req, offset, aligned_bytes, align,
ret = bdrv_aligned_pwritev(child, req, offset, aligned_bytes, align,
NULL, flags);
if (ret < 0) {
goto fail;
@ -1468,7 +1477,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
mark_request_serialising(req, align);
wait_serialising_requests(req);
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
ret = bdrv_aligned_preadv(bs, req, offset, align,
ret = bdrv_aligned_preadv(child, req, offset, align,
align, &local_qiov, 0);
if (ret < 0) {
goto fail;
@ -1476,7 +1485,7 @@ static int coroutine_fn bdrv_co_do_zero_pwritev(BlockDriverState *bs,
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_AFTER_TAIL);
memset(buf, 0, bytes);
ret = bdrv_aligned_pwritev(bs, req, offset, align, align,
ret = bdrv_aligned_pwritev(child, req, offset, align, align,
&local_qiov, flags & ~BDRV_REQ_ZERO_WRITE);
}
fail:
@ -1523,7 +1532,7 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
tracked_request_begin(&req, bs, offset, bytes, BDRV_TRACKED_WRITE);
if (!qiov) {
ret = bdrv_co_do_zero_pwritev(bs, offset, bytes, flags, &req);
ret = bdrv_co_do_zero_pwritev(child, offset, bytes, flags, &req);
goto out;
}
@ -1542,7 +1551,7 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
qemu_iovec_init_external(&head_qiov, &head_iov, 1);
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_HEAD);
ret = bdrv_aligned_preadv(bs, &req, offset & ~(align - 1), align,
ret = bdrv_aligned_preadv(child, &req, offset & ~(align - 1), align,
align, &head_qiov, 0);
if (ret < 0) {
goto fail;
@ -1584,8 +1593,8 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
qemu_iovec_init_external(&tail_qiov, &tail_iov, 1);
bdrv_debug_event(bs, BLKDBG_PWRITEV_RMW_TAIL);
ret = bdrv_aligned_preadv(bs, &req, (offset + bytes) & ~(align - 1), align,
align, &tail_qiov, 0);
ret = bdrv_aligned_preadv(child, &req, (offset + bytes) & ~(align - 1),
align, align, &tail_qiov, 0);
if (ret < 0) {
goto fail;
}
@ -1603,7 +1612,7 @@ int coroutine_fn bdrv_co_pwritev(BdrvChild *child,
bytes = ROUND_UP(bytes, align);
}
ret = bdrv_aligned_pwritev(bs, &req, offset, bytes, align,
ret = bdrv_aligned_pwritev(child, &req, offset, bytes, align,
use_local_qiov ? &local_qiov : qiov,
flags);

237
block/mirror.c
View File

@ -38,7 +38,10 @@ typedef struct MirrorBlockJob {
BlockJob common;
RateLimit limit;
BlockBackend *target;
BlockDriverState *mirror_top_bs;
BlockDriverState *source;
BlockDriverState *base;
/* The name of the graph node to replace */
char *replaces;
/* The BDS to replace */
@ -327,7 +330,7 @@ static void mirror_do_zero_or_discard(MirrorBlockJob *s,
static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
{
BlockDriverState *source = blk_bs(s->common.blk);
BlockDriverState *source = s->source;
int64_t sector_num, first_chunk;
uint64_t delay_ns = 0;
/* At least the first dirty chunk is mirrored in one iteration. */
@ -497,12 +500,30 @@ static void mirror_exit(BlockJob *job, void *opaque)
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
MirrorExitData *data = opaque;
AioContext *replace_aio_context = NULL;
BlockDriverState *src = blk_bs(s->common.blk);
BlockDriverState *src = s->source;
BlockDriverState *target_bs = blk_bs(s->target);
BlockDriverState *mirror_top_bs = s->mirror_top_bs;
Error *local_err = NULL;
/* Make sure that the source BDS doesn't go away before we called
* block_job_completed(). */
bdrv_ref(src);
bdrv_ref(mirror_top_bs);
/* We don't access the source any more. Dropping any WRITE/RESIZE is
* required before it could become a backing file of target_bs. */
bdrv_child_try_set_perm(mirror_top_bs->backing, 0, BLK_PERM_ALL,
&error_abort);
if (s->backing_mode == MIRROR_SOURCE_BACKING_CHAIN) {
BlockDriverState *backing = s->is_none_mode ? src : s->base;
if (backing_bs(target_bs) != backing) {
bdrv_set_backing_hd(target_bs, backing, &local_err);
if (local_err) {
error_report_err(local_err);
data->ret = -EPERM;
}
}
}
if (s->to_replace) {
replace_aio_context = bdrv_get_aio_context(s->to_replace);
@ -524,10 +545,6 @@ static void mirror_exit(BlockJob *job, void *opaque)
bdrv_drained_begin(target_bs);
bdrv_replace_in_backing_chain(to_replace, target_bs);
bdrv_drained_end(target_bs);
/* We just changed the BDS the job BB refers to */
blk_remove_bs(job->blk);
blk_insert_bs(job->blk, src);
}
if (s->to_replace) {
bdrv_op_unblock_all(s->to_replace, s->replace_blocker);
@ -540,9 +557,26 @@ static void mirror_exit(BlockJob *job, void *opaque)
g_free(s->replaces);
blk_unref(s->target);
s->target = NULL;
/* Remove the mirror filter driver from the graph. Before this, get rid of
* the blockers on the intermediate nodes so that the resulting state is
* valid. */
block_job_remove_all_bdrv(job);
bdrv_replace_in_backing_chain(mirror_top_bs, backing_bs(mirror_top_bs));
/* We just changed the BDS the job BB refers to (with either or both of the
* bdrv_replace_in_backing_chain() calls), so switch the BB back so the
* cleanup does the right thing. We don't need any permissions any more
* now. */
blk_remove_bs(job->blk);
blk_set_perm(job->blk, 0, BLK_PERM_ALL, &error_abort);
blk_insert_bs(job->blk, mirror_top_bs, &error_abort);
block_job_completed(&s->common, data->ret);
g_free(data);
bdrv_drained_end(src);
bdrv_unref(mirror_top_bs);
bdrv_unref(src);
}
@ -562,7 +596,7 @@ static int coroutine_fn mirror_dirty_init(MirrorBlockJob *s)
{
int64_t sector_num, end;
BlockDriverState *base = s->base;
BlockDriverState *bs = blk_bs(s->common.blk);
BlockDriverState *bs = s->source;
BlockDriverState *target_bs = blk_bs(s->target);
int ret, n;
@ -644,7 +678,7 @@ static void coroutine_fn mirror_run(void *opaque)
{
MirrorBlockJob *s = opaque;
MirrorExitData *data;
BlockDriverState *bs = blk_bs(s->common.blk);
BlockDriverState *bs = s->source;
BlockDriverState *target_bs = blk_bs(s->target);
bool need_drain = true;
int64_t length;
@ -876,9 +910,8 @@ static void mirror_set_speed(BlockJob *job, int64_t speed, Error **errp)
static void mirror_complete(BlockJob *job, Error **errp)
{
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
BlockDriverState *src, *target;
BlockDriverState *target;
src = blk_bs(job->blk);
target = blk_bs(s->target);
if (!s->synced) {
@ -910,6 +943,10 @@ static void mirror_complete(BlockJob *job, Error **errp)
replace_aio_context = bdrv_get_aio_context(s->to_replace);
aio_context_acquire(replace_aio_context);
/* TODO Translate this into permission system. Current definition of
* GRAPH_MOD would require to request it for the parents; they might
* not even be BlockDriverStates, however, so a BdrvChild can't address
* them. May need redefinition of GRAPH_MOD. */
error_setg(&s->replace_blocker,
"block device is in use by block-job-complete");
bdrv_op_block_all(s->to_replace, s->replace_blocker);
@ -918,13 +955,6 @@ static void mirror_complete(BlockJob *job, Error **errp)
aio_context_release(replace_aio_context);
}
if (s->backing_mode == MIRROR_SOURCE_BACKING_CHAIN) {
BlockDriverState *backing = s->is_none_mode ? src : s->base;
if (backing_bs(target) != backing) {
bdrv_set_backing_hd(target, backing);
}
}
s->should_complete = true;
block_job_enter(&s->common);
}
@ -980,6 +1010,77 @@ static const BlockJobDriver commit_active_job_driver = {
.drain = mirror_drain,
};
static int coroutine_fn bdrv_mirror_top_preadv(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
{
return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
}
static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
{
return bdrv_co_pwritev(bs->backing, offset, bytes, qiov, flags);
}
static int coroutine_fn bdrv_mirror_top_flush(BlockDriverState *bs)
{
return bdrv_co_flush(bs->backing->bs);
}
static int64_t coroutine_fn bdrv_mirror_top_get_block_status(
BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
BlockDriverState **file)
{
*pnum = nb_sectors;
*file = bs->backing->bs;
return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
(sector_num << BDRV_SECTOR_BITS);
}
static int coroutine_fn bdrv_mirror_top_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int count, BdrvRequestFlags flags)
{
return bdrv_co_pwrite_zeroes(bs->backing, offset, count, flags);
}
static int coroutine_fn bdrv_mirror_top_pdiscard(BlockDriverState *bs,
int64_t offset, int count)
{
return bdrv_co_pdiscard(bs->backing->bs, offset, count);
}
static void bdrv_mirror_top_close(BlockDriverState *bs)
{
}
static void bdrv_mirror_top_child_perm(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
/* Must be able to forward guest writes to the real image */
*nperm = 0;
if (perm & BLK_PERM_WRITE) {
*nperm |= BLK_PERM_WRITE;
}
*nshared = BLK_PERM_ALL;
}
/* Dummy node that provides consistent read to its users without requiring it
* from its backing file and that allows writes on the backing file chain. */
static BlockDriver bdrv_mirror_top = {
.format_name = "mirror_top",
.bdrv_co_preadv = bdrv_mirror_top_preadv,
.bdrv_co_pwritev = bdrv_mirror_top_pwritev,
.bdrv_co_pwrite_zeroes = bdrv_mirror_top_pwrite_zeroes,
.bdrv_co_pdiscard = bdrv_mirror_top_pdiscard,
.bdrv_co_flush = bdrv_mirror_top_flush,
.bdrv_co_get_block_status = bdrv_mirror_top_get_block_status,
.bdrv_close = bdrv_mirror_top_close,
.bdrv_child_perm = bdrv_mirror_top_child_perm,
};
static void mirror_start_job(const char *job_id, BlockDriverState *bs,
int creation_flags, BlockDriverState *target,
const char *replaces, int64_t speed,
@ -992,9 +1093,14 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
void *opaque, Error **errp,
const BlockJobDriver *driver,
bool is_none_mode, BlockDriverState *base,
bool auto_complete)
bool auto_complete, const char *filter_node_name)
{
MirrorBlockJob *s;
BlockDriverState *mirror_top_bs;
bool target_graph_mod;
bool target_is_backing;
Error *local_err = NULL;
int ret;
if (granularity == 0) {
granularity = bdrv_get_default_bitmap_granularity(target);
@ -1011,14 +1117,62 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
buf_size = DEFAULT_MIRROR_BUF_SIZE;
}
s = block_job_create(job_id, driver, bs, speed, creation_flags,
cb, opaque, errp);
if (!s) {
/* In the case of active commit, add dummy driver to provide consistent
* reads on the top, while disabling it in the intermediate nodes, and make
* the backing chain writable. */
mirror_top_bs = bdrv_new_open_driver(&bdrv_mirror_top, filter_node_name,
BDRV_O_RDWR, errp);
if (mirror_top_bs == NULL) {
return;
}
mirror_top_bs->total_sectors = bs->total_sectors;
/* bdrv_append takes ownership of the mirror_top_bs reference, need to keep
* it alive until block_job_create() even if bs has no parent. */
bdrv_ref(mirror_top_bs);
bdrv_drained_begin(bs);
bdrv_append(mirror_top_bs, bs, &local_err);
bdrv_drained_end(bs);
if (local_err) {
bdrv_unref(mirror_top_bs);
error_propagate(errp, local_err);
return;
}
s->target = blk_new();
blk_insert_bs(s->target, target);
/* Make sure that the source is not resized while the job is running */
s = block_job_create(job_id, driver, mirror_top_bs,
BLK_PERM_CONSISTENT_READ,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD, speed,
creation_flags, cb, opaque, errp);
bdrv_unref(mirror_top_bs);
if (!s) {
goto fail;
}
s->source = bs;
s->mirror_top_bs = mirror_top_bs;
/* No resize for the target either; while the mirror is still running, a
* consistent read isn't necessarily possible. We could possibly allow
* writes and graph modifications, though it would likely defeat the
* purpose of a mirror, so leave them blocked for now.
*
* In the case of active commit, things look a bit different, though,
* because the target is an already populated backing file in active use.
* We can allow anything except resize there.*/
target_is_backing = bdrv_chain_contains(bs, target);
target_graph_mod = (backing_mode != MIRROR_LEAVE_BACKING_CHAIN);
s->target = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE |
(target_graph_mod ? BLK_PERM_GRAPH_MOD : 0),
BLK_PERM_WRITE_UNCHANGED |
(target_is_backing ? BLK_PERM_CONSISTENT_READ |
BLK_PERM_WRITE |
BLK_PERM_GRAPH_MOD : 0));
ret = blk_insert_bs(s->target, target, errp);
if (ret < 0) {
goto fail;
}
s->replaces = g_strdup(replaces);
s->on_source_error = on_source_error;
@ -1041,18 +1195,40 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
return;
}
block_job_add_bdrv(&s->common, target);
/* Required permissions are already taken with blk_new() */
block_job_add_bdrv(&s->common, "target", target, 0, BLK_PERM_ALL,
&error_abort);
/* In commit_active_start() all intermediate nodes disappear, so
* any jobs in them must be blocked */
if (bdrv_chain_contains(bs, target)) {
if (target_is_backing) {
BlockDriverState *iter;
for (iter = backing_bs(bs); iter != target; iter = backing_bs(iter)) {
block_job_add_bdrv(&s->common, iter);
/* XXX BLK_PERM_WRITE needs to be allowed so we don't block
* ourselves at s->base (if writes are blocked for a node, they are
* also blocked for its backing file). The other options would be a
* second filter driver above s->base (== target). */
ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE,
errp);
if (ret < 0) {
goto fail;
}
}
}
trace_mirror_start(bs, s, opaque);
block_job_start(&s->common);
return;
fail:
if (s) {
g_free(s->replaces);
blk_unref(s->target);
block_job_unref(&s->common);
}
bdrv_replace_in_backing_chain(mirror_top_bs, backing_bs(mirror_top_bs));
}
void mirror_start(const char *job_id, BlockDriverState *bs,
@ -1061,7 +1237,7 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
MirrorSyncMode mode, BlockMirrorBackingMode backing_mode,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
bool unmap, Error **errp)
bool unmap, const char *filter_node_name, Error **errp)
{
bool is_none_mode;
BlockDriverState *base;
@ -1075,12 +1251,14 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
mirror_start_job(job_id, bs, BLOCK_JOB_DEFAULT, target, replaces,
speed, granularity, buf_size, backing_mode,
on_source_error, on_target_error, unmap, NULL, NULL, errp,
&mirror_job_driver, is_none_mode, base, false);
&mirror_job_driver, is_none_mode, base, false,
filter_node_name);
}
void commit_active_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *base, int creation_flags,
int64_t speed, BlockdevOnError on_error,
const char *filter_node_name,
BlockCompletionFunc *cb, void *opaque, Error **errp,
bool auto_complete)
{
@ -1096,7 +1274,8 @@ void commit_active_start(const char *job_id, BlockDriverState *bs,
mirror_start_job(job_id, bs, creation_flags, base, NULL, speed, 0, 0,
MIRROR_LEAVE_BACKING_CHAIN,
on_error, on_error, true, cb, opaque, &local_err,
&commit_active_job_driver, false, base, auto_complete);
&commit_active_job_driver, false, base, auto_complete,
filter_node_name);
if (local_err) {
error_propagate(errp, local_err);
goto error_restore_flags;

4
block/parallels.c
View File

@ -488,7 +488,8 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
}
file = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (file == NULL) {
error_propagate(errp, local_err);
return -EIO;
@ -762,6 +763,7 @@ static BlockDriver bdrv_parallels = {
.bdrv_probe = parallels_probe,
.bdrv_open = parallels_open,
.bdrv_close = parallels_close,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_get_block_status = parallels_co_get_block_status,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_flush_to_os = parallels_co_flush_to_os,

4
block/qcow.c
View File

@ -823,7 +823,8 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
}
qcow_blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (qcow_blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -1052,6 +1053,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_probe = qcow_probe,
.bdrv_open = qcow_open,
.bdrv_close = qcow_close,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_reopen_prepare = qcow_reopen_prepare,
.bdrv_create = qcow_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,

19
block/qcow2.c
View File

@ -2202,7 +2202,8 @@ static int qcow2_create2(const char *filename, int64_t total_size,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
return -EIO;
@ -2266,7 +2267,8 @@ static int qcow2_create2(const char *filename, int64_t total_size,
options = qdict_new();
qdict_put(options, "driver", qstring_from_str("qcow2"));
blk = blk_new_open(filename, NULL, options,
BDRV_O_RDWR | BDRV_O_NO_FLUSH, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_NO_FLUSH,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -3113,6 +3115,7 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
uint64_t cluster_size = s->cluster_size;
bool encrypt;
int refcount_bits = s->refcount_bits;
Error *local_err = NULL;
int ret;
QemuOptDesc *desc = opts->list->desc;
Qcow2AmendHelperCBInfo helper_cb_info;
@ -3262,11 +3265,16 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
}
if (new_size) {
BlockBackend *blk = blk_new();
blk_insert_bs(blk, bs);
BlockBackend *blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
ret = blk_insert_bs(blk, bs, &local_err);
if (ret < 0) {
error_report_err(local_err);
blk_unref(blk);
return ret;
}
ret = blk_truncate(blk, new_size);
blk_unref(blk);
if (ret < 0) {
return ret;
}
@ -3403,6 +3411,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_reopen_commit = qcow2_reopen_commit,
.bdrv_reopen_abort = qcow2_reopen_abort,
.bdrv_join_options = qcow2_join_options,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_create = qcow2_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = qcow2_co_get_block_status,

4
block/qed.c
View File

@ -625,7 +625,8 @@ static int qed_create(const char *filename, uint32_t cluster_size,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
return -EIO;
@ -1704,6 +1705,7 @@ static BlockDriver bdrv_qed = {
.bdrv_open = bdrv_qed_open,
.bdrv_close = bdrv_qed_close,
.bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_create = bdrv_qed_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = bdrv_qed_co_get_block_status,

11
block/quorum.c
View File

@ -1032,10 +1032,17 @@ static void quorum_add_child(BlockDriverState *bs, BlockDriverState *child_bs,
/* We can safely add the child now */
bdrv_ref(child_bs);
child = bdrv_attach_child(bs, child_bs, indexstr, &child_format);
child = bdrv_attach_child(bs, child_bs, indexstr, &child_format, errp);
if (child == NULL) {
s->next_child_index--;
bdrv_unref(child_bs);
goto out;
}
s->children = g_renew(BdrvChild *, s->children, s->num_children + 1);
s->children[s->num_children++] = child;
out:
bdrv_drained_end(bs);
}
@ -1126,6 +1133,8 @@ static BlockDriver bdrv_quorum = {
.bdrv_add_child = quorum_add_child,
.bdrv_del_child = quorum_del_child,
.bdrv_child_perm = bdrv_filter_default_perms,
.is_filter = true,
.bdrv_recurse_is_first_non_filter = quorum_recurse_is_first_non_filter,
};

1
block/raw-format.c
View File

@ -467,6 +467,7 @@ BlockDriver bdrv_raw = {
.bdrv_reopen_abort = &raw_reopen_abort,
.bdrv_open = &raw_open,
.bdrv_close = &raw_close,
.bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_create = &raw_create,
.bdrv_co_preadv = &raw_co_preadv,
.bdrv_co_pwritev = &raw_co_pwritev,

3
block/replication.c
View File

@ -644,7 +644,7 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp)
s->replication_state = BLOCK_REPLICATION_FAILOVER;
commit_active_start(NULL, s->active_disk->bs, s->secondary_disk->bs,
BLOCK_JOB_INTERNAL, 0, BLOCKDEV_ON_ERROR_REPORT,
replication_done, bs, errp, true);
NULL, replication_done, bs, errp, true);
break;
default:
aio_context_release(aio_context);
@ -660,6 +660,7 @@ BlockDriver bdrv_replication = {
.bdrv_open = replication_open,
.bdrv_close = replication_close,
.bdrv_child_perm = bdrv_filter_default_perms,
.bdrv_getlength = replication_getlength,
.bdrv_co_readv = replication_co_readv,

2
block/sheepdog.c
View File

@ -1609,7 +1609,7 @@ static int sd_prealloc(const char *filename, Error **errp)
int ret;
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, errp);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp);
if (blk == NULL) {
ret = -EIO;
goto out_with_err_set;

47
block/stream.c
View File

@ -68,6 +68,7 @@ static void stream_complete(BlockJob *job, void *opaque)
StreamCompleteData *data = opaque;
BlockDriverState *bs = blk_bs(job->blk);
BlockDriverState *base = s->base;
Error *local_err = NULL;
if (!block_job_is_cancelled(&s->common) && data->reached_end &&
data->ret == 0) {
@ -79,11 +80,19 @@ static void stream_complete(BlockJob *job, void *opaque)
}
}
data->ret = bdrv_change_backing_file(bs, base_id, base_fmt);
bdrv_set_backing_hd(bs, base);
bdrv_set_backing_hd(bs, base, &local_err);
if (local_err) {
error_report_err(local_err);
data->ret = -EPERM;
goto out;
}
}
out:
/* Reopen the image back in read-only mode if necessary */
if (s->bs_flags != bdrv_get_flags(bs)) {
/* Give up write permissions before making it read-only */
blk_set_perm(job->blk, 0, BLK_PERM_ALL, &error_abort);
bdrv_reopen(bs, s->bs_flags, NULL);
}
@ -229,25 +238,35 @@ void stream_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *iter;
int orig_bs_flags;
s = block_job_create(job_id, &stream_job_driver, bs, speed,
BLOCK_JOB_DEFAULT, NULL, NULL, errp);
if (!s) {
return;
}
/* Make sure that the image is opened in read-write mode */
orig_bs_flags = bdrv_get_flags(bs);
if (!(orig_bs_flags & BDRV_O_RDWR)) {
if (bdrv_reopen(bs, orig_bs_flags | BDRV_O_RDWR, errp) != 0) {
block_job_unref(&s->common);
return;
}
}
/* Block all intermediate nodes between bs and base, because they
* will disappear from the chain after this operation */
/* Prevent concurrent jobs trying to modify the graph structure here, we
* already have our own plans. Also don't allow resize as the image size is
* queried only at the job start and then cached. */
s = block_job_create(job_id, &stream_job_driver, bs,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
BLK_PERM_GRAPH_MOD,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
BLK_PERM_WRITE,
speed, BLOCK_JOB_DEFAULT, NULL, NULL, errp);
if (!s) {
goto fail;
}
/* Block all intermediate nodes between bs and base, because they will
* disappear from the chain after this operation. The streaming job reads
* every block only once, assuming that it doesn't change, so block writes
* and resizes. */
for (iter = backing_bs(bs); iter && iter != base; iter = backing_bs(iter)) {
block_job_add_bdrv(&s->common, iter);
block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED,
&error_abort);
}
s->base = base;
@ -257,4 +276,10 @@ void stream_start(const char *job_id, BlockDriverState *bs,
s->on_error = on_error;
trace_stream_start(bs, base, s);
block_job_start(&s->common);
return;
fail:
if (orig_bs_flags != bdrv_get_flags(bs)) {
bdrv_reopen(bs, s->bs_flags, NULL);
}
}

4
block/vdi.c
View File

@ -763,7 +763,8 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -891,6 +892,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_open = vdi_open,
.bdrv_close = vdi_close,
.bdrv_reopen_prepare = vdi_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_create = vdi_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = vdi_co_get_block_status,

4
block/vhdx.c
View File

@ -1859,7 +1859,8 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -1983,6 +1984,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_open = vhdx_open,
.bdrv_close = vhdx_close,
.bdrv_reopen_prepare = vhdx_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_readv = vhdx_co_readv,
.bdrv_co_writev = vhdx_co_writev,
.bdrv_create = vhdx_create,

7
block/vmdk.c
View File

@ -1703,7 +1703,8 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -2071,7 +2072,8 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
}
new_blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (new_blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -2359,6 +2361,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_open = vmdk_open,
.bdrv_check = vmdk_check,
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_preadv = vmdk_co_preadv,
.bdrv_co_pwritev = vmdk_co_pwritev,
.bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed,

4
block/vpc.c
View File

@ -915,7 +915,8 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
}
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
&local_err);
if (blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
@ -1067,6 +1068,7 @@ static BlockDriver bdrv_vpc = {
.bdrv_open = vpc_open,
.bdrv_close = vpc_close,
.bdrv_reopen_prepare = vpc_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_create = vpc_create,
.bdrv_co_preadv = vpc_co_preadv,

24
block/vvfat.c
View File

@ -3041,7 +3041,7 @@ static int enable_write_target(BlockDriverState *bs, Error **errp)
&error_abort);
*(void**) backing->opaque = s;
bdrv_set_backing_hd(s->bs, backing);
bdrv_set_backing_hd(s->bs, backing, &error_abort);
bdrv_unref(backing);
return 0;
@ -3052,6 +3052,27 @@ err:
return ret;
}
static void vvfat_child_perm(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
BDRVVVFATState *s = bs->opaque;
assert(c == s->qcow || role == &child_backing);
if (c == s->qcow) {
/* This is a private node, nobody should try to attach to it */
*nperm = BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE;
*nshared = BLK_PERM_WRITE_UNCHANGED;
} else {
/* The backing file is there so 'commit' can use it. vvfat doesn't
* access it in any way. */
*nperm = 0;
*nshared = BLK_PERM_ALL;
}
}
static void vvfat_close(BlockDriverState *bs)
{
BDRVVVFATState *s = bs->opaque;
@ -3077,6 +3098,7 @@ static BlockDriver bdrv_vvfat = {
.bdrv_file_open = vvfat_open,
.bdrv_refresh_limits = vvfat_refresh_limits,
.bdrv_close = vvfat_close,
.bdrv_child_perm = vvfat_child_perm,
.bdrv_co_preadv = vvfat_co_preadv,
.bdrv_co_pwritev = vvfat_co_pwritev,

74
blockdev.c
View File

@ -558,7 +558,7 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
if ((!file || !*file) && !qdict_size(bs_opts)) {
BlockBackendRootState *blk_rs;
blk = blk_new();
blk = blk_new(0, BLK_PERM_ALL);
blk_rs = blk_get_root_state(blk);
blk_rs->open_flags = bdrv_flags;
blk_rs->read_only = read_only;
@ -1768,6 +1768,17 @@ static void external_snapshot_prepare(BlkActionState *common,
if (!state->new_bs->drv->supports_backing) {
error_setg(errp, "The snapshot does not support backing images");
return;
}
/* This removes our old bs and adds the new bs. This is an operation that
* can fail, so we need to do it in .prepare; undoing it for abort is
* always possible. */
bdrv_ref(state->new_bs);
bdrv_append(state->new_bs, state->old_bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
@ -1778,8 +1789,6 @@ static void external_snapshot_commit(BlkActionState *common)
bdrv_set_aio_context(state->new_bs, state->aio_context);
/* This removes our old bs and adds the new bs */
bdrv_append(state->new_bs, state->old_bs);
/* We don't need (or want) to use the transactional
* bdrv_reopen_multiple() across all the entries at once, because we
* don't want to abort all of them if one of them fails the reopen */
@ -1794,7 +1803,9 @@ static void external_snapshot_abort(BlkActionState *common)
ExternalSnapshotState *state =
DO_UPCAST(ExternalSnapshotState, common, common);
if (state->new_bs) {
bdrv_unref(state->new_bs);
if (state->new_bs->backing) {
bdrv_replace_in_backing_chain(state->new_bs, state->old_bs);
}
}
}
@ -1805,6 +1816,7 @@ static void external_snapshot_clean(BlkActionState *common)
if (state->aio_context) {
bdrv_drained_end(state->old_bs);
aio_context_release(state->aio_context);
bdrv_unref(state->new_bs);
}
}
@ -2311,7 +2323,7 @@ static int do_open_tray(const char *blk_name, const char *qdev_id,
}
if (!locked || force) {
blk_dev_change_media_cb(blk, false);
blk_dev_change_media_cb(blk, false, &error_abort);
}
if (locked && !force) {
@ -2349,6 +2361,7 @@ void qmp_blockdev_close_tray(bool has_device, const char *device,
Error **errp)
{
BlockBackend *blk;
Error *local_err = NULL;
device = has_device ? device : NULL;
id = has_id ? id : NULL;
@ -2372,7 +2385,11 @@ void qmp_blockdev_close_tray(bool has_device, const char *device,
return;
}
blk_dev_change_media_cb(blk, true);
blk_dev_change_media_cb(blk, true, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
void qmp_x_blockdev_remove_medium(bool has_device, const char *device,
@ -2425,7 +2442,7 @@ void qmp_x_blockdev_remove_medium(bool has_device, const char *device,
* called at all); therefore, the medium needs to be ejected here.
* Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
* value passed here (i.e. false). */
blk_dev_change_media_cb(blk, false);
blk_dev_change_media_cb(blk, false, &error_abort);
}
out:
@ -2435,7 +2452,9 @@ out:
static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
BlockDriverState *bs, Error **errp)
{
Error *local_err = NULL;
bool has_device;
int ret;
/* For BBs without a device, we can exchange the BDS tree at will */
has_device = blk_get_attached_dev(blk);
@ -2455,7 +2474,10 @@ static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
return;
}
blk_insert_bs(blk, bs);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
return;
}
if (!blk_dev_has_tray(blk)) {
/* For tray-less devices, blockdev-close-tray is a no-op (or may not be
@ -2463,7 +2485,12 @@ static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
* slot here.
* Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
* value passed here (i.e. true). */
blk_dev_change_media_cb(blk, true);
blk_dev_change_media_cb(blk, true, &local_err);
if (local_err) {
error_propagate(errp, local_err);
blk_remove_bs(blk);
return;
}
}
}
@ -2890,8 +2917,11 @@ void qmp_block_resize(bool has_device, const char *device,
goto out;
}
blk = blk_new();
blk_insert_bs(blk, bs);
blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
goto out;
}
/* complete all in-flight operations before resizing the device */
bdrv_drain_all();
@ -3014,6 +3044,7 @@ void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
bool has_top, const char *top,
bool has_backing_file, const char *backing_file,
bool has_speed, int64_t speed,
bool has_filter_node_name, const char *filter_node_name,
Error **errp)
{
BlockDriverState *bs;
@ -3029,6 +3060,9 @@ void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
if (!has_speed) {
speed = 0;
}
if (!has_filter_node_name) {
filter_node_name = NULL;
}
/* Important Note:
* libvirt relies on the DeviceNotFound error class in order to probe for
@ -3103,8 +3137,8 @@ void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
goto out;
}
commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
BLOCK_JOB_DEFAULT, speed, on_error, NULL, NULL,
&local_err, false);
BLOCK_JOB_DEFAULT, speed, on_error,
filter_node_name, NULL, NULL, &local_err, false);
} else {
BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
@ -3112,7 +3146,7 @@ void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
}
commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, speed,
on_error, has_backing_file ? backing_file : NULL,
&local_err);
filter_node_name, &local_err);
}
if (local_err != NULL) {
error_propagate(errp, local_err);
@ -3348,6 +3382,8 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
bool has_on_target_error,
BlockdevOnError on_target_error,
bool has_unmap, bool unmap,
bool has_filter_node_name,
const char *filter_node_name,
Error **errp)
{
@ -3369,6 +3405,9 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
if (!has_unmap) {
unmap = true;
}
if (!has_filter_node_name) {
filter_node_name = NULL;
}
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
@ -3398,7 +3437,8 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
mirror_start(job_id, bs, target,
has_replaces ? replaces : NULL,
speed, granularity, buf_size, sync, backing_mode,
on_source_error, on_target_error, unmap, errp);
on_source_error, on_target_error, unmap, filter_node_name,
errp);
}
void qmp_drive_mirror(DriveMirror *arg, Error **errp)
@ -3536,6 +3576,7 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp)
arg->has_on_source_error, arg->on_source_error,
arg->has_on_target_error, arg->on_target_error,
arg->has_unmap, arg->unmap,
false, NULL,
&local_err);
bdrv_unref(target_bs);
error_propagate(errp, local_err);
@ -3554,6 +3595,8 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
BlockdevOnError on_source_error,
bool has_on_target_error,
BlockdevOnError on_target_error,
bool has_filter_node_name,
const char *filter_node_name,
Error **errp)
{
BlockDriverState *bs;
@ -3585,6 +3628,7 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
has_on_source_error, on_source_error,
has_on_target_error, on_target_error,
true, true,
has_filter_node_name, filter_node_name,
&local_err);
error_propagate(errp, local_err);

62
blockjob.c
View File

@ -55,6 +55,19 @@ struct BlockJobTxn {
static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs);
static char *child_job_get_parent_desc(BdrvChild *c)
{
BlockJob *job = c->opaque;
return g_strdup_printf("%s job '%s'",
BlockJobType_lookup[job->driver->job_type],
job->id);
}
static const BdrvChildRole child_job = {
.get_parent_desc = child_job_get_parent_desc,
.stay_at_node = true,
};
BlockJob *block_job_next(BlockJob *job)
{
if (!job) {
@ -115,19 +128,44 @@ static void block_job_detach_aio_context(void *opaque)
block_job_unref(job);
}
void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs)
void block_job_remove_all_bdrv(BlockJob *job)
{
job->nodes = g_slist_prepend(job->nodes, bs);
GSList *l;
for (l = job->nodes; l; l = l->next) {
BdrvChild *c = l->data;
bdrv_op_unblock_all(c->bs, job->blocker);
bdrv_root_unref_child(c);
}
g_slist_free(job->nodes);
job->nodes = NULL;
}
int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs,
uint64_t perm, uint64_t shared_perm, Error **errp)
{
BdrvChild *c;
c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm,
job, errp);
if (c == NULL) {
return -EPERM;
}
job->nodes = g_slist_prepend(job->nodes, c);
bdrv_ref(bs);
bdrv_op_block_all(bs, job->blocker);
return 0;
}
void *block_job_create(const char *job_id, const BlockJobDriver *driver,
BlockDriverState *bs, int64_t speed, int flags,
BlockDriverState *bs, uint64_t perm,
uint64_t shared_perm, int64_t speed, int flags,
BlockCompletionFunc *cb, void *opaque, Error **errp)
{
BlockBackend *blk;
BlockJob *job;
int ret;
if (bs->job) {
error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
@ -159,13 +197,17 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
}
}
blk = blk_new();
blk_insert_bs(blk, bs);
blk = blk_new(perm, shared_perm);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
blk_unref(blk);
return NULL;
}
job = g_malloc0(driver->instance_size);
error_setg(&job->blocker, "block device is in use by block job: %s",
BlockJobType_lookup[driver->job_type]);
block_job_add_bdrv(job, bs);
block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort);
bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);
job->driver = driver;
@ -228,15 +270,9 @@ void block_job_ref(BlockJob *job)
void block_job_unref(BlockJob *job)
{
if (--job->refcnt == 0) {
GSList *l;
BlockDriverState *bs = blk_bs(job->blk);
bs->job = NULL;
for (l = job->nodes; l; l = l->next) {
bs = l->data;
bdrv_op_unblock_all(bs, job->blocker);
bdrv_unref(bs);
}
g_slist_free(job->nodes);
block_job_remove_all_bdrv(job);
blk_remove_aio_context_notifier(job->blk,
block_job_attached_aio_context,
block_job_detach_aio_context, job);

33
hmp.c
View File

@ -2045,13 +2045,17 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
const char* device = qdict_get_str(qdict, "device");
const char* command = qdict_get_str(qdict, "command");
Error *err = NULL;
int ret;
blk = blk_by_name(device);
if (!blk) {
BlockDriverState *bs = bdrv_lookup_bs(NULL, device, &err);
if (bs) {
blk = local_blk = blk_new();
blk_insert_bs(blk, bs);
blk = local_blk = blk_new(0, BLK_PERM_ALL);
ret = blk_insert_bs(blk, bs, &err);
if (ret < 0) {
goto fail;
}
} else {
goto fail;
}
@ -2060,6 +2064,31 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
aio_context = blk_get_aio_context(blk);
aio_context_acquire(aio_context);
/*
* Notably absent: Proper permission management. This is sad, but it seems
* almost impossible to achieve without changing the semantics and thereby
* limiting the use cases of the qemu-io HMP command.
*
* In an ideal world we would unconditionally create a new BlockBackend for
* qemuio_command(), but we have commands like 'reopen' and want them to
* take effect on the exact BlockBackend whose name the user passed instead
* of just on a temporary copy of it.
*
* Another problem is that deleting the temporary BlockBackend involves
* draining all requests on it first, but some qemu-iotests cases want to
* issue multiple aio_read/write requests and expect them to complete in
* the background while the monitor has already returned.
*
* This is also what prevents us from saving the original permissions and
* restoring them later: We can't revoke permissions until all requests
* have completed, and we don't know when that is nor can we really let
* anything else run before we have revoken them to avoid race conditions.
*
* What happens now is that command() in qemu-io-cmds.c can extend the
* permissions if necessary for the qemu-io command. And they simply stay
* extended, possibly resulting in a read-only guest device keeping write
* permissions. Ugly, but it appears to be the lesser evil.
*/
qemuio_command(blk, command);
aio_context_release(aio_context);

24
hw/block/block.c
View File

@ -51,11 +51,33 @@ void blkconf_blocksizes(BlockConf *conf)
}
}
void blkconf_apply_backend_options(BlockConf *conf)
void blkconf_apply_backend_options(BlockConf *conf, bool readonly,
bool resizable, Error **errp)
{
BlockBackend *blk = conf->blk;
BlockdevOnError rerror, werror;
uint64_t perm, shared_perm;
bool wce;
int ret;
perm = BLK_PERM_CONSISTENT_READ;
if (!readonly) {
perm |= BLK_PERM_WRITE;
}
shared_perm = BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
BLK_PERM_GRAPH_MOD;
if (resizable) {
shared_perm |= BLK_PERM_RESIZE;
}
if (conf->share_rw) {
shared_perm |= BLK_PERM_WRITE;
}
ret = blk_set_perm(blk, perm, shared_perm, errp);
if (ret < 0) {
return;
}
switch (conf->wce) {
case ON_OFF_AUTO_ON: wce = true; break;

28
hw/block/fdc.c
View File

@ -186,6 +186,7 @@ typedef enum FDiskFlags {
struct FDrive {
FDCtrl *fdctrl;
BlockBackend *blk;
BlockConf *conf;
/* Drive status */
FloppyDriveType drive; /* CMOS drive type */
uint8_t perpendicular; /* 2.88 MB access mode */
@ -469,9 +470,22 @@ static void fd_revalidate(FDrive *drv)
}
}
static void fd_change_cb(void *opaque, bool load)
static void fd_change_cb(void *opaque, bool load, Error **errp)
{
FDrive *drive = opaque;
Error *local_err = NULL;
if (!load) {
blk_set_perm(drive->blk, 0, BLK_PERM_ALL, &error_abort);
} else {
blkconf_apply_backend_options(drive->conf,
blk_is_read_only(drive->blk), false,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
drive->media_changed = 1;
drive->media_validated = false;
@ -508,6 +522,7 @@ static int floppy_drive_init(DeviceState *qdev)
FloppyDrive *dev = FLOPPY_DRIVE(qdev);
FloppyBus *bus = FLOPPY_BUS(qdev->parent_bus);
FDrive *drive;
Error *local_err = NULL;
int ret;
if (dev->unit == -1) {
@ -533,7 +548,7 @@ static int floppy_drive_init(DeviceState *qdev)
if (!dev->conf.blk) {
/* Anonymous BlockBackend for an empty drive */
dev->conf.blk = blk_new();
dev->conf.blk = blk_new(0, BLK_PERM_ALL);
ret = blk_attach_dev(dev->conf.blk, qdev);
assert(ret == 0);
}
@ -551,7 +566,13 @@ static int floppy_drive_init(DeviceState *qdev)
* blkconf_apply_backend_options(). */
dev->conf.rerror = BLOCKDEV_ON_ERROR_AUTO;
dev->conf.werror = BLOCKDEV_ON_ERROR_AUTO;
blkconf_apply_backend_options(&dev->conf);
blkconf_apply_backend_options(&dev->conf, blk_is_read_only(dev->conf.blk),
false, &local_err);
if (local_err) {
error_report_err(local_err);
return -1;
}
/* 'enospc' is the default for -drive, 'report' is what blk_new() gives us
* for empty drives. */
@ -565,6 +586,7 @@ static int floppy_drive_init(DeviceState *qdev)
return -1;
}
drive->conf = &dev->conf;
drive->blk = dev->conf.blk;
drive->fdctrl = bus->fdc;

8
hw/block/m25p80.c
View File

@ -1215,6 +1215,7 @@ static void m25p80_realize(SSISlave *ss, Error **errp)
{
Flash *s = M25P80(ss);
M25P80Class *mc = M25P80_GET_CLASS(s);
int ret;
s->pi = mc->pi;
@ -1222,6 +1223,13 @@ static void m25p80_realize(SSISlave *ss, Error **errp)
s->dirty_page = -1;
if (s->blk) {
uint64_t perm = BLK_PERM_CONSISTENT_READ |
(blk_is_read_only(s->blk) ? 0 : BLK_PERM_WRITE);
ret = blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
DB_PRINT_L(0, "Binding to IF_MTD drive\n");
s->storage = blk_blockalign(s->blk, s->size);

7
hw/block/nand.c
View File

@ -373,6 +373,8 @@ static void nand_realize(DeviceState *dev, Error **errp)
{
int pagesize;
NANDFlashState *s = NAND(dev);
int ret;
s->buswidth = nand_flash_ids[s->chip_id].width >> 3;
s->size = nand_flash_ids[s->chip_id].size << 20;
@ -407,6 +409,11 @@ static void nand_realize(DeviceState *dev, Error **errp)
error_setg(errp, "Can't use a read-only drive");
return;
}
ret = blk_set_perm(s->blk, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
if (blk_getlength(s->blk) >=
(s->pages << s->page_shift) + (s->pages << s->oob_shift)) {
pagesize = 0;

8
hw/block/nvme.c
View File

@ -835,6 +835,7 @@ static int nvme_init(PCIDevice *pci_dev)
int i;
int64_t bs_size;
uint8_t *pci_conf;
Error *local_err = NULL;
if (!n->conf.blk) {
return -1;
@ -850,7 +851,12 @@ static int nvme_init(PCIDevice *pci_dev)
return -1;
}
blkconf_blocksizes(&n->conf);
blkconf_apply_backend_options(&n->conf);
blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk),
false, &local_err);
if (local_err) {
error_report_err(local_err);
return -1;
}
pci_conf = pci_dev->config;
pci_conf[PCI_INTERRUPT_PIN] = 1;

7
hw/block/onenand.c
View File

@ -778,6 +778,7 @@ static int onenand_initfn(SysBusDevice *sbd)
OneNANDState *s = ONE_NAND(dev);
uint32_t size = 1 << (24 + ((s->id.dev >> 4) & 7));
void *ram;
Error *local_err = NULL;
s->base = (hwaddr)-1;
s->rdy = NULL;
@ -796,6 +797,12 @@ static int onenand_initfn(SysBusDevice *sbd)
error_report("Can't use a read-only drive");
return -1;
}
blk_set_perm(s->blk, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
BLK_PERM_ALL, &local_err);
if (local_err) {
error_report_err(local_err);
return -1;
}
s->blk_cur = s->blk;
}
s->otp = memset(g_malloc((64 + 2) << PAGE_SHIFT),

18
hw/block/pflash_cfi01.c
View File

@ -757,6 +757,18 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
pfl->storage = memory_region_get_ram_ptr(&pfl->mem);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);
if (pfl->blk) {
uint64_t perm;
pfl->ro = blk_is_read_only(pfl->blk);
perm = BLK_PERM_CONSISTENT_READ | (pfl->ro ? 0 : BLK_PERM_WRITE);
ret = blk_set_perm(pfl->blk, perm, BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
} else {
pfl->ro = 0;
}
if (pfl->blk) {
/* read the initial flash content */
ret = blk_pread(pfl->blk, 0, pfl->storage, total_len);
@ -768,12 +780,6 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
}
}
if (pfl->blk) {
pfl->ro = blk_is_read_only(pfl->blk);
} else {
pfl->ro = 0;
}
/* Default to devices being used at their maximum device width. This was
* assumed before the device_width support was added.
*/

19
hw/block/pflash_cfi02.c
View File

@ -632,6 +632,19 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
pfl->chip_len = chip_len;
if (pfl->blk) {
uint64_t perm;
pfl->ro = blk_is_read_only(pfl->blk);
perm = BLK_PERM_CONSISTENT_READ | (pfl->ro ? 0 : BLK_PERM_WRITE);
ret = blk_set_perm(pfl->blk, perm, BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
} else {
pfl->ro = 0;
}
if (pfl->blk) {
/* read the initial flash content */
ret = blk_pread(pfl->blk, 0, pfl->storage, chip_len);
@ -646,12 +659,6 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
pfl->rom_mode = 1;
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);
if (pfl->blk) {
pfl->ro = blk_is_read_only(pfl->blk);
} else {
pfl->ro = 0;
}
pfl->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pflash_timer, pfl);
pfl->wcycle = 0;
pfl->cmd = 0;

8
hw/block/virtio-blk.c
View File

@ -928,7 +928,13 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
}
blkconf_serial(&conf->conf, &conf->serial);
blkconf_apply_backend_options(&conf->conf);
blkconf_apply_backend_options(&conf->conf,
blk_is_read_only(conf->conf.blk), true,
&err);
if (err) {
error_propagate(errp, err);
return;
}
s->original_wce = blk_enable_write_cache(conf->conf.blk);
blkconf_geometry(&conf->conf, NULL, 65535, 255, 255, &err);
if (err) {

9
hw/core/qdev-properties-system.c
View File

@ -73,14 +73,19 @@ static void parse_drive(DeviceState *dev, const char *str, void **ptr,
{
BlockBackend *blk;
bool blk_created = false;
int ret;
blk = blk_by_name(str);
if (!blk) {
BlockDriverState *bs = bdrv_lookup_bs(NULL, str, NULL);
if (bs) {
blk = blk_new();
blk_insert_bs(blk, bs);
blk = blk_new(0, BLK_PERM_ALL);
blk_created = true;
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
goto fail;
}
}
}
if (!blk) {

2
hw/ide/core.c
View File

@ -1120,7 +1120,7 @@ static void ide_cfata_metadata_write(IDEState *s)
}
/* called when the inserted state of the media has changed */
static void ide_cd_change_cb(void *opaque, bool load)
static void ide_cd_change_cb(void *opaque, bool load, Error **errp)
{
IDEState *s = opaque;
uint64_t nb_sectors;

9
hw/ide/qdev.c
View File

@ -170,7 +170,7 @@ static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
return -1;
} else {
/* Anonymous BlockBackend for an empty drive */
dev->conf.blk = blk_new();
dev->conf.blk = blk_new(0, BLK_PERM_ALL);
}
}
@ -196,7 +196,12 @@ static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
return -1;
}
}
blkconf_apply_backend_options(&dev->conf);
blkconf_apply_backend_options(&dev->conf, kind == IDE_CD, kind != IDE_CD,
&err);
if (err) {
error_report_err(err);
return -1;
}
if (ide_init_drive(s, dev->conf.blk, kind,
dev->version, dev->serial, dev->model, dev->wwn,

8
hw/nvram/spapr_nvram.c
View File

@ -141,9 +141,17 @@ static void rtas_nvram_store(PowerPCCPU *cpu, sPAPRMachineState *spapr,
static void spapr_nvram_realize(VIOsPAPRDevice *dev, Error **errp)
{
sPAPRNVRAM *nvram = VIO_SPAPR_NVRAM(dev);
int ret;
if (nvram->blk) {
nvram->size = blk_getlength(nvram->blk);
ret = blk_set_perm(nvram->blk,
BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
} else {
nvram->size = DEFAULT_NVRAM_SIZE;
}

12
hw/scsi/scsi-disk.c
View File

@ -2240,7 +2240,7 @@ static void scsi_disk_resize_cb(void *opaque)
}
}
static void scsi_cd_change_media_cb(void *opaque, bool load)
static void scsi_cd_change_media_cb(void *opaque, bool load, Error **errp)
{
SCSIDiskState *s = opaque;
@ -2328,7 +2328,13 @@ static void scsi_realize(SCSIDevice *dev, Error **errp)
return;
}
}
blkconf_apply_backend_options(&dev->conf);
blkconf_apply_backend_options(&dev->conf,
blk_is_read_only(s->qdev.conf.blk),
dev->type == TYPE_DISK, &err);
if (err) {
error_propagate(errp, err);
return;
}
if (s->qdev.conf.discard_granularity == -1) {
s->qdev.conf.discard_granularity =
@ -2380,7 +2386,7 @@ static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
if (!dev->conf.blk) {
dev->conf.blk = blk_new();
dev->conf.blk = blk_new(0, BLK_PERM_ALL);
}
s->qdev.blocksize = 2048;

8
hw/sd/sd.c
View File

@ -458,7 +458,7 @@ static bool sd_get_readonly(SDState *sd)
return sd->wp_switch;
}
static void sd_cardchange(void *opaque, bool load)
static void sd_cardchange(void *opaque, bool load, Error **errp)
{
SDState *sd = opaque;
DeviceState *dev = DEVICE(sd);
@ -1887,6 +1887,7 @@ static void sd_instance_finalize(Object *obj)
static void sd_realize(DeviceState *dev, Error **errp)
{
SDState *sd = SD_CARD(dev);
int ret;
if (sd->blk && blk_is_read_only(sd->blk)) {
error_setg(errp, "Cannot use read-only drive as SD card");
@ -1894,6 +1895,11 @@ static void sd_realize(DeviceState *dev, Error **errp)
}
if (sd->blk) {
ret = blk_set_perm(sd->blk, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
BLK_PERM_ALL, errp);
if (ret < 0) {
return;
}
blk_set_dev_ops(sd->blk, &sd_block_ops, sd);
}
}

6
hw/usb/dev-storage.c
View File

@ -603,7 +603,11 @@ static void usb_msd_realize_storage(USBDevice *dev, Error **errp)
blkconf_serial(&s->conf, &dev->serial);
blkconf_blocksizes(&s->conf);
blkconf_apply_backend_options(&s->conf);
blkconf_apply_backend_options(&s->conf, blk_is_read_only(blk), true, &err);
if (err) {
error_propagate(errp, err);
return;
}
/*
* Hack alert: this pretends to be a block device, but it's really

46
include/block/block.h
View File

@ -82,6 +82,7 @@ typedef struct HDGeometry {
} HDGeometry;
#define BDRV_O_RDWR 0x0002
#define BDRV_O_RESIZE 0x0004 /* request permission for resizing the node */
#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
#define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
@ -187,6 +188,42 @@ typedef enum BlockOpType {
BLOCK_OP_TYPE_MAX,
} BlockOpType;
/* Block node permission constants */
enum {
/**
* A user that has the "permission" of consistent reads is guaranteed that
* their view of the contents of the block device is complete and
* self-consistent, representing the contents of a disk at a specific
* point.
*
* For most block devices (including their backing files) this is true, but
* the property cannot be maintained in a few situations like for
* intermediate nodes of a commit block job.
*/
BLK_PERM_CONSISTENT_READ = 0x01,
/** This permission is required to change the visible disk contents. */
BLK_PERM_WRITE = 0x02,
/**
* This permission (which is weaker than BLK_PERM_WRITE) is both enough and
* required for writes to the block node when the caller promises that
* the visible disk content doesn't change.
*/
BLK_PERM_WRITE_UNCHANGED = 0x04,
/** This permission is required to change the size of a block node. */
BLK_PERM_RESIZE = 0x08,
/**
* This permission is required to change the node that this BdrvChild
* points to.
*/
BLK_PERM_GRAPH_MOD = 0x10,
BLK_PERM_ALL = 0x1f,
};
/* disk I/O throttling */
void bdrv_init(void);
void bdrv_init_with_whitelist(void);
@ -199,7 +236,8 @@ int bdrv_create(BlockDriver *drv, const char* filename,
QemuOpts *opts, Error **errp);
int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
BlockDriverState *bdrv_new(void);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top,
Error **errp);
void bdrv_replace_in_backing_chain(BlockDriverState *old,
BlockDriverState *new);
@ -210,7 +248,8 @@ BdrvChild *bdrv_open_child(const char *filename,
BlockDriverState* parent,
const BdrvChildRole *child_role,
bool allow_none, Error **errp);
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd);
void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd,
Error **errp);
int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
const char *bdref_key, Error **errp);
BlockDriverState *bdrv_open(const char *filename, const char *reference,
@ -484,7 +523,8 @@ void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child);
BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role);
const BdrvChildRole *child_role,
Error **errp);
bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp);
void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason);

126
include/block/block_int.h
View File

@ -320,6 +320,59 @@ struct BlockDriver {
void (*bdrv_del_child)(BlockDriverState *parent, BdrvChild *child,
Error **errp);
/**
* Informs the block driver that a permission change is intended. The
* driver checks whether the change is permissible and may take other
* preparations for the change (e.g. get file system locks). This operation
* is always followed either by a call to either .bdrv_set_perm or
* .bdrv_abort_perm_update.
*
* Checks whether the requested set of cumulative permissions in @perm
* can be granted for accessing @bs and whether no other users are using
* permissions other than those given in @shared (both arguments take
* BLK_PERM_* bitmasks).
*
* If both conditions are met, 0 is returned. Otherwise, -errno is returned
* and errp is set to an error describing the conflict.
*/
int (*bdrv_check_perm)(BlockDriverState *bs, uint64_t perm,
uint64_t shared, Error **errp);
/**
* Called to inform the driver that the set of cumulative set of used
* permissions for @bs has changed to @perm, and the set of sharable
* permission to @shared. The driver can use this to propagate changes to
* its children (i.e. request permissions only if a parent actually needs
* them).
*
* This function is only invoked after bdrv_check_perm(), so block drivers
* may rely on preparations made in their .bdrv_check_perm implementation.
*/
void (*bdrv_set_perm)(BlockDriverState *bs, uint64_t perm, uint64_t shared);
/*
* Called to inform the driver that after a previous bdrv_check_perm()
* call, the permission update is not performed and any preparations made
* for it (e.g. taken file locks) need to be undone.
*
* This function can be called even for nodes that never saw a
* bdrv_check_perm() call. It is a no-op then.
*/
void (*bdrv_abort_perm_update)(BlockDriverState *bs);
/**
* Returns in @nperm and @nshared the permissions that the driver for @bs
* needs on its child @c, based on the cumulative permissions requested by
* the parents in @parent_perm and @parent_shared.
*
* If @c is NULL, return the permissions for attaching a new child for the
* given @role.
*/
void (*bdrv_child_perm)(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t parent_perm, uint64_t parent_shared,
uint64_t *nperm, uint64_t *nshared);
QLIST_ENTRY(BlockDriver) list;
};
@ -388,6 +441,10 @@ typedef struct BdrvAioNotifier {
} BdrvAioNotifier;
struct BdrvChildRole {
/* If true, bdrv_replace_in_backing_chain() doesn't change the node this
* BdrvChild points to. */
bool stay_at_node;
void (*inherit_options)(int *child_flags, QDict *child_options,
int parent_flags, QDict *parent_options);
@ -399,6 +456,12 @@ struct BdrvChildRole {
* name), or NULL if the parent can't provide a better name. */
const char* (*get_name)(BdrvChild *child);
/* Returns a malloced string that describes the parent of the child for a
* human reader. This could be a node-name, BlockBackend name, qdev ID or
* QOM path of the device owning the BlockBackend, job type and ID etc. The
* caller is responsible for freeing the memory. */
char* (*get_parent_desc)(BdrvChild *child);
/*
* If this pair of functions is implemented, the parent doesn't issue new
* requests after returning from .drained_begin() until .drained_end() is
@ -409,16 +472,32 @@ struct BdrvChildRole {
*/
void (*drained_begin)(BdrvChild *child);
void (*drained_end)(BdrvChild *child);
void (*attach)(BdrvChild *child);
void (*detach)(BdrvChild *child);
};
extern const BdrvChildRole child_file;
extern const BdrvChildRole child_format;
extern const BdrvChildRole child_backing;
struct BdrvChild {
BlockDriverState *bs;
char *name;
const BdrvChildRole *role;
void *opaque;
/**
* Granted permissions for operating on this BdrvChild (BLK_PERM_* bitmask)
*/
uint64_t perm;
/**
* Permissions that can still be granted to other users of @bs while this
* BdrvChild is still attached to it. (BLK_PERM_* bitmask)
*/
uint64_t shared_perm;
QLIST_ENTRY(BdrvChild) next;
QLIST_ENTRY(BdrvChild) next_parent;
};
@ -701,13 +780,16 @@ void stream_start(const char *job_id, BlockDriverState *bs,
* @speed: The maximum speed, in bytes per second, or 0 for unlimited.
* @on_error: The action to take upon error.
* @backing_file_str: String to use as the backing file in @top's overlay
* @filter_node_name: The node name that should be assigned to the filter
* driver that the commit job inserts into the graph above @top. NULL means
* that a node name should be autogenerated.
* @errp: Error object.
*
*/
void commit_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *base, BlockDriverState *top, int64_t speed,
BlockdevOnError on_error, const char *backing_file_str,
Error **errp);
const char *filter_node_name, Error **errp);
/**
* commit_active_start:
* @job_id: The id of the newly-created job, or %NULL to use the
@ -718,6 +800,9 @@ void commit_start(const char *job_id, BlockDriverState *bs,
* See @BlockJobCreateFlags
* @speed: The maximum speed, in bytes per second, or 0 for unlimited.
* @on_error: The action to take upon error.
* @filter_node_name: The node name that should be assigned to the filter
* driver that the commit job inserts into the graph above @bs. NULL means that
* a node name should be autogenerated.
* @cb: Completion function for the job.
* @opaque: Opaque pointer value passed to @cb.
* @errp: Error object.
@ -727,8 +812,9 @@ void commit_start(const char *job_id, BlockDriverState *bs,
void commit_active_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *base, int creation_flags,
int64_t speed, BlockdevOnError on_error,
BlockCompletionFunc *cb,
void *opaque, Error **errp, bool auto_complete);
const char *filter_node_name,
BlockCompletionFunc *cb, void *opaque, Error **errp,
bool auto_complete);
/*
* mirror_start:
* @job_id: The id of the newly-created job, or %NULL to use the
@ -745,6 +831,9 @@ void commit_active_start(const char *job_id, BlockDriverState *bs,
* @on_source_error: The action to take upon error reading from the source.
* @on_target_error: The action to take upon error writing to the target.
* @unmap: Whether to unmap target where source sectors only contain zeroes.
* @filter_node_name: The node name that should be assigned to the filter
* driver that the mirror job inserts into the graph above @bs. NULL means that
* a node name should be autogenerated.
* @errp: Error object.
*
* Start a mirroring operation on @bs. Clusters that are allocated
@ -758,7 +847,7 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
MirrorSyncMode mode, BlockMirrorBackingMode backing_mode,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
bool unmap, Error **errp);
bool unmap, const char *filter_node_name, Error **errp);
/*
* backup_job_create:
@ -796,11 +885,36 @@ void hmp_drive_add_node(Monitor *mon, const char *optstr);
BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
const char *child_name,
const BdrvChildRole *child_role,
void *opaque);
uint64_t perm, uint64_t shared_perm,
void *opaque, Error **errp);
void bdrv_root_unref_child(BdrvChild *child);
int bdrv_child_check_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp);
void bdrv_child_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared);
void bdrv_child_abort_perm_update(BdrvChild *c);
int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared,
Error **errp);
/* Default implementation for BlockDriver.bdrv_child_perm() that can be used by
* block filters: Forward CONSISTENT_READ, WRITE, WRITE_UNCHANGED and RESIZE to
* all children */
void bdrv_filter_default_perms(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared);
/* Default implementation for BlockDriver.bdrv_child_perm() that can be used by
* (non-raw) image formats: Like above for bs->backing, but for bs->file it
* requires WRITE | RESIZE for read-write images, always requires
* CONSISTENT_READ and doesn't share WRITE. */
void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
const BdrvChildRole *role,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared);
const char *bdrv_get_parent_name(const BlockDriverState *bs);
void blk_dev_change_media_cb(BlockBackend *blk, bool load);
void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp);
bool blk_dev_has_removable_media(BlockBackend *blk);
bool blk_dev_has_tray(BlockBackend *blk);
void blk_dev_eject_request(BlockBackend *blk, bool force);

14
include/block/blockjob.h
View File

@ -169,13 +169,25 @@ BlockJob *block_job_get(const char *id);
/**
* block_job_add_bdrv:
* @job: A block job
* @name: The name to assign to the new BdrvChild
* @bs: A BlockDriverState that is involved in @job
* @perm, @shared_perm: Permissions to request on the node
*
* Add @bs to the list of BlockDriverState that are involved in
* @job. This means that all operations will be blocked on @bs while
* @job exists.
*/
void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs);
int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs,
uint64_t perm, uint64_t shared_perm, Error **errp);
/**
* block_job_remove_all_bdrv:
* @job: The block job
*
* Remove all BlockDriverStates from the list of nodes that are involved in the
* job. This removes the blockers added with block_job_add_bdrv().
*/
void block_job_remove_all_bdrv(BlockJob *job);
/**
* block_job_set_speed:

4
include/block/blockjob_int.h
View File

@ -119,6 +119,7 @@ struct BlockJobDriver {
* generated automatically.
* @job_type: The class object for the newly-created job.
* @bs: The block
* @perm, @shared_perm: Permissions to request for @bs
* @speed: The maximum speed, in bytes per second, or 0 for unlimited.
* @cb: Completion function for the job.
* @opaque: Opaque pointer value passed to @cb.
@ -134,7 +135,8 @@ struct BlockJobDriver {
* called from a wrapper that is specific to the job type.
*/
void *block_job_create(const char *job_id, const BlockJobDriver *driver,
BlockDriverState *bs, int64_t speed, int flags,
BlockDriverState *bs, uint64_t perm,
uint64_t shared_perm, int64_t speed, int flags,
BlockCompletionFunc *cb, void *opaque, Error **errp);
/**

8
include/hw/block/block.h
View File

@ -26,6 +26,7 @@ typedef struct BlockConf {
/* geometry, not all devices use this */
uint32_t cyls, heads, secs;
OnOffAuto wce;
bool share_rw;
BlockdevOnError rerror;
BlockdevOnError werror;
} BlockConf;
@ -53,7 +54,9 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
DEFINE_PROP_UINT32("discard_granularity", _state, \
_conf.discard_granularity, -1), \
DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, ON_OFF_AUTO_AUTO)
DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \
ON_OFF_AUTO_AUTO), \
DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false)
#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \
DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \
@ -73,7 +76,8 @@ void blkconf_geometry(BlockConf *conf, int *trans,
unsigned cyls_max, unsigned heads_max, unsigned secs_max,
Error **errp);
void blkconf_blocksizes(BlockConf *conf);
void blkconf_apply_backend_options(BlockConf *conf);
void blkconf_apply_backend_options(BlockConf *conf, bool readonly,
bool resizable, Error **errp);
/* Hard disk geometry */

1
include/qemu-io.h
View File

@ -36,6 +36,7 @@ typedef struct cmdinfo {
const char *args;
const char *oneline;
helpfunc_t help;
uint64_t perm;
} cmdinfo_t;
extern bool qemuio_misalign;

9
include/sysemu/block-backend.h
View File

@ -34,7 +34,7 @@ typedef struct BlockDevOps {
* changes. Sure would be useful if it did.
* Device models with removable media must implement this callback.
*/
void (*change_media_cb)(void *opaque, bool load);
void (*change_media_cb)(void *opaque, bool load, Error **errp);
/*
* Runs when an eject request is issued from the monitor, the tray
* is closed, and the medium is locked.
@ -84,7 +84,7 @@ typedef struct BlockBackendPublic {
QLIST_ENTRY(BlockBackendPublic) round_robin;
} BlockBackendPublic;
BlockBackend *blk_new(void);
BlockBackend *blk_new(uint64_t perm, uint64_t shared_perm);
BlockBackend *blk_new_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp);
int blk_get_refcnt(BlockBackend *blk);
@ -102,9 +102,12 @@ BlockBackend *blk_by_public(BlockBackendPublic *public);
BlockDriverState *blk_bs(BlockBackend *blk);
void blk_remove_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp);
bool bdrv_has_blk(BlockDriverState *bs);
bool bdrv_is_root_node(BlockDriverState *bs);
int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,
Error **errp);
void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm);
void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
void blk_iostatus_enable(BlockBackend *blk);

21
migration/block.c
View File

@ -379,7 +379,7 @@ static void unset_dirty_tracking(void)
}
}
static void init_blk_migration(QEMUFile *f)
static int init_blk_migration(QEMUFile *f)
{
BlockDriverState *bs;
BlkMigDevState *bmds;
@ -390,6 +390,8 @@ static void init_blk_migration(QEMUFile *f)
BlkMigDevState *bmds;
BlockDriverState *bs;
} *bmds_bs;
Error *local_err = NULL;
int ret;
block_mig_state.submitted = 0;
block_mig_state.read_done = 0;
@ -411,11 +413,12 @@ static void init_blk_migration(QEMUFile *f)
sectors = bdrv_nb_sectors(bs);
if (sectors <= 0) {
ret = sectors;
goto out;
}
bmds = g_new0(BlkMigDevState, 1);
bmds->blk = blk_new();
bmds->blk = blk_new(BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL);
bmds->blk_name = g_strdup(bdrv_get_device_name(bs));
bmds->bulk_completed = 0;
bmds->total_sectors = sectors;
@ -445,7 +448,11 @@ static void init_blk_migration(QEMUFile *f)
BlockDriverState *bs = bmds_bs[i].bs;
if (bmds) {
blk_insert_bs(bmds->blk, bs);
ret = blk_insert_bs(bmds->blk, bs, &local_err);
if (ret < 0) {
error_report_err(local_err);
goto out;
}
alloc_aio_bitmap(bmds);
error_setg(&bmds->blocker, "block device is in use by migration");
@ -453,8 +460,10 @@ static void init_blk_migration(QEMUFile *f)
}
}
ret = 0;
out:
g_free(bmds_bs);
return ret;
}
/* Called with no lock taken. */
@ -705,7 +714,11 @@ static int block_save_setup(QEMUFile *f, void *opaque)
block_mig_state.submitted, block_mig_state.transferred);
qemu_mutex_lock_iothread();
init_blk_migration(f);
ret = init_blk_migration(f);
if (ret < 0) {
qemu_mutex_unlock_iothread();
return ret;
}
/* start track dirty blocks */
ret = set_dirty_tracking();

16
nbd/server.c
View File

@ -891,9 +891,21 @@ NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset, off_t size,
{
BlockBackend *blk;
NBDExport *exp = g_malloc0(sizeof(NBDExport));
uint64_t perm;
int ret;
blk = blk_new();
blk_insert_bs(blk, bs);
/* Don't allow resize while the NBD server is running, otherwise we don't
* care what happens with the node. */
perm = BLK_PERM_CONSISTENT_READ;
if ((nbdflags & NBD_FLAG_READ_ONLY) == 0) {
perm |= BLK_PERM_WRITE;
}
blk = blk_new(perm, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
goto fail;
}
blk_set_enable_write_cache(blk, !writethrough);
exp->refcount = 1;

16
qapi/block-core.json
View File

@ -1304,6 +1304,11 @@
#
# @speed: #optional the maximum speed, in bytes per second
#
# @filter-node-name: #optional the node name that should be assigned to the
# filter driver that the commit job inserts into the graph
# above @top. If this option is not given, a node name is
# autogenerated. (Since: 2.9)
#
# Returns: Nothing on success
# If commit or stream is already active on this device, DeviceInUse
# If @device does not exist, DeviceNotFound
@ -1323,7 +1328,8 @@
##
{ 'command': 'block-commit',
'data': { '*job-id': 'str', 'device': 'str', '*base': 'str', '*top': 'str',
'*backing-file': 'str', '*speed': 'int' } }
'*backing-file': 'str', '*speed': 'int',
'*filter-node-name': 'str' } }
##
# @drive-backup:
@ -1671,6 +1677,11 @@
# default 'report' (no limitations, since this applies to
# a different block device than @device).
#
# @filter-node-name: #optional the node name that should be assigned to the
# filter driver that the mirror job inserts into the graph
# above @device. If this option is not given, a node name is
# autogenerated. (Since: 2.9)
#
# Returns: nothing on success.
#
# Since: 2.6
@ -1690,7 +1701,8 @@
'sync': 'MirrorSyncMode',
'*speed': 'int', '*granularity': 'uint32',
'*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }
'*on-target-error': 'BlockdevOnError',
'*filter-node-name': 'str' } }
##
# @block_set_io_throttle:

4
qemu-img-cmds.hx
View File

@ -40,9 +40,9 @@ STEXI
ETEXI
DEF("convert", img_convert,
"convert [--object objectdef] [--image-opts] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-o options] [-s snapshot_id_or_name] [-l snapshot_param] [-S sparse_size] filename [filename2 [...]] output_filename")
"convert [--object objectdef] [--image-opts] [-c] [-p] [-q] [-n] [-f fmt] [-t cache] [-T src_cache] [-O output_fmt] [-o options] [-s snapshot_id_or_name] [-l snapshot_param] [-S sparse_size] [-m num_coroutines] [-W] filename [filename2 [...]] output_filename")
STEXI
@item convert [--object @var{objectdef}] [--image-opts] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
@item convert [--object @var{objectdef}] [--image-opts] [-c] [-p] [-q] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] [-m @var{num_coroutines}] [-W] @var{filename} [@var{filename2} [...]] @var{output_filename}
ETEXI
DEF("dd", img_dd,

334
qemu-img.c
View File

@ -156,6 +156,11 @@ static void QEMU_NORETURN help(void)
" kinds of errors, with a higher risk of choosing the wrong fix or\n"
" hiding corruption that has already occurred.\n"
"\n"
"Parameters to convert subcommand:\n"
" '-m' specifies how many coroutines work in parallel during the convert\n"
" process (defaults to 8)\n"
" '-W' allow to write to the target out of order rather than sequential\n"
"\n"
"Parameters to snapshot subcommand:\n"
" 'snapshot' is the name of the snapshot to create, apply or delete\n"
" '-a' applies a snapshot (revert disk to saved state)\n"
@ -809,6 +814,8 @@ static void run_block_job(BlockJob *job, Error **errp)
{
AioContext *aio_context = blk_get_aio_context(job->blk);
/* FIXME In error cases, the job simply goes away and we access a dangling
* pointer below. */
aio_context_acquire(aio_context);
do {
aio_poll(aio_context, true);
@ -830,6 +837,7 @@ static int img_commit(int argc, char **argv)
const char *filename, *fmt, *cache, *base;
BlockBackend *blk;
BlockDriverState *bs, *base_bs;
BlockJob *job;
bool progress = false, quiet = false, drop = false;
bool writethrough;
Error *local_err = NULL;
@ -950,8 +958,8 @@ static int img_commit(int argc, char **argv)
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
commit_active_start("commit", bs, base_bs, BLOCK_JOB_DEFAULT, 0,
BLOCKDEV_ON_ERROR_REPORT, common_block_job_cb, &cbi,
&local_err, false);
BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb,
&cbi, &local_err, false);
aio_context_release(aio_context);
if (local_err) {
goto done;
@ -965,7 +973,8 @@ static int img_commit(int argc, char **argv)
bdrv_ref(bs);
}
run_block_job(bs->job, &local_err);
job = block_job_get("commit");
run_block_job(job, &local_err);
if (local_err) {
goto unref_backing;
}
@ -1462,48 +1471,61 @@ enum ImgConvertBlockStatus {
BLK_BACKING_FILE,
};
#define MAX_COROUTINES 16
typedef struct ImgConvertState {
BlockBackend **src;
int64_t *src_sectors;
int src_cur, src_num;
int64_t src_cur_offset;
int src_num;
int64_t total_sectors;
int64_t allocated_sectors;
int64_t allocated_done;
int64_t sector_num;
int64_t wr_offs;
enum ImgConvertBlockStatus status;
int64_t sector_next_status;
BlockBackend *target;
bool has_zero_init;
bool compressed;
bool target_has_backing;
bool wr_in_order;
int min_sparse;
size_t cluster_sectors;
size_t buf_sectors;
int num_coroutines;
int running_coroutines;
Coroutine *co[MAX_COROUTINES];
int64_t wait_sector_num[MAX_COROUTINES];
CoMutex lock;
int ret;
} ImgConvertState;
static void convert_select_part(ImgConvertState *s, int64_t sector_num)
static void convert_select_part(ImgConvertState *s, int64_t sector_num,
int *src_cur, int64_t *src_cur_offset)
{
assert(sector_num >= s->src_cur_offset);
while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) {
s->src_cur_offset += s->src_sectors[s->src_cur];
s->src_cur++;
assert(s->src_cur < s->src_num);
*src_cur = 0;
*src_cur_offset = 0;
while (sector_num - *src_cur_offset >= s->src_sectors[*src_cur]) {
*src_cur_offset += s->src_sectors[*src_cur];
(*src_cur)++;
assert(*src_cur < s->src_num);
}
}
static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
{
int64_t ret;
int n;
int64_t ret, src_cur_offset;
int n, src_cur;
convert_select_part(s, sector_num);
convert_select_part(s, sector_num, &src_cur, &src_cur_offset);
assert(s->total_sectors > sector_num);
n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS);
if (s->sector_next_status <= sector_num) {
BlockDriverState *file;
ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]),
sector_num - s->src_cur_offset,
ret = bdrv_get_block_status(blk_bs(s->src[src_cur]),
sector_num - src_cur_offset,
n, &n, &file);
if (ret < 0) {
return ret;
@ -1519,8 +1541,8 @@ static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
/* Check block status of the backing file chain to avoid
* needlessly reading zeroes and limiting the iteration to the
* buffer size */
ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL,
sector_num - s->src_cur_offset,
ret = bdrv_get_block_status_above(blk_bs(s->src[src_cur]), NULL,
sector_num - src_cur_offset,
n, &n, &file);
if (ret < 0) {
return ret;
@ -1558,28 +1580,34 @@ static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num)
return n;
}
static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors,
uint8_t *buf)
static int coroutine_fn convert_co_read(ImgConvertState *s, int64_t sector_num,
int nb_sectors, uint8_t *buf)
{
int n;
int ret;
int n, ret;
QEMUIOVector qiov;
struct iovec iov;
assert(nb_sectors <= s->buf_sectors);
while (nb_sectors > 0) {
BlockBackend *blk;
int64_t bs_sectors;
int src_cur;
int64_t bs_sectors, src_cur_offset;
/* In the case of compression with multiple source files, we can get a
* nb_sectors that spreads into the next part. So we must be able to
* read across multiple BDSes for one convert_read() call. */
convert_select_part(s, sector_num);
blk = s->src[s->src_cur];
bs_sectors = s->src_sectors[s->src_cur];
convert_select_part(s, sector_num, &src_cur, &src_cur_offset);
blk = s->src[src_cur];
bs_sectors = s->src_sectors[src_cur];
n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset));
ret = blk_pread(blk,
(sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS,
buf, n << BDRV_SECTOR_BITS);
n = MIN(nb_sectors, bs_sectors - (sector_num - src_cur_offset));
iov.iov_base = buf;
iov.iov_len = n << BDRV_SECTOR_BITS;
qemu_iovec_init_external(&qiov, &iov, 1);
ret = blk_co_preadv(
blk, (sector_num - src_cur_offset) << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, &qiov, 0);
if (ret < 0) {
return ret;
}
@ -1592,15 +1620,18 @@ static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors,
return 0;
}
static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
const uint8_t *buf)
static int coroutine_fn convert_co_write(ImgConvertState *s, int64_t sector_num,
int nb_sectors, uint8_t *buf,
enum ImgConvertBlockStatus status)
{
int ret;
QEMUIOVector qiov;
struct iovec iov;
while (nb_sectors > 0) {
int n = nb_sectors;
switch (s->status) {
switch (status) {
case BLK_BACKING_FILE:
/* If we have a backing file, leave clusters unallocated that are
* unallocated in the source image, so that the backing file is
@ -1621,9 +1652,13 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
break;
}
ret = blk_pwrite_compressed(s->target,
sector_num << BDRV_SECTOR_BITS,
buf, n << BDRV_SECTOR_BITS);
iov.iov_base = buf;
iov.iov_len = n << BDRV_SECTOR_BITS;
qemu_iovec_init_external(&qiov, &iov, 1);
ret = blk_co_pwritev(s->target, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, &qiov,
BDRV_REQ_WRITE_COMPRESSED);
if (ret < 0) {
return ret;
}
@ -1636,8 +1671,12 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
if (!s->min_sparse ||
is_allocated_sectors_min(buf, n, &n, s->min_sparse))
{
ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS,
buf, n << BDRV_SECTOR_BITS, 0);
iov.iov_base = buf;
iov.iov_len = n << BDRV_SECTOR_BITS;
qemu_iovec_init_external(&qiov, &iov, 1);
ret = blk_co_pwritev(s->target, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, &qiov, 0);
if (ret < 0) {
return ret;
}
@ -1649,8 +1688,9 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
if (s->has_zero_init) {
break;
}
ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, 0);
ret = blk_co_pwrite_zeroes(s->target,
sector_num << BDRV_SECTOR_BITS,
n << BDRV_SECTOR_BITS, 0);
if (ret < 0) {
return ret;
}
@ -1665,12 +1705,122 @@ static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors,
return 0;
}
static void coroutine_fn convert_co_do_copy(void *opaque)
{
ImgConvertState *s = opaque;
uint8_t *buf = NULL;
int ret, i;
int index = -1;
for (i = 0; i < s->num_coroutines; i++) {
if (s->co[i] == qemu_coroutine_self()) {
index = i;
break;
}
}
assert(index >= 0);
s->running_coroutines++;
buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE);
while (1) {
int n;
int64_t sector_num;
enum ImgConvertBlockStatus status;
qemu_co_mutex_lock(&s->lock);
if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) {
qemu_co_mutex_unlock(&s->lock);
goto out;
}
n = convert_iteration_sectors(s, s->sector_num);
if (n < 0) {
qemu_co_mutex_unlock(&s->lock);
s->ret = n;
goto out;
}
/* save current sector and allocation status to local variables */
sector_num = s->sector_num;
status = s->status;
if (!s->min_sparse && s->status == BLK_ZERO) {
n = MIN(n, s->buf_sectors);
}
/* increment global sector counter so that other coroutines can
* already continue reading beyond this request */
s->sector_num += n;
qemu_co_mutex_unlock(&s->lock);
if (status == BLK_DATA || (!s->min_sparse && status == BLK_ZERO)) {
s->allocated_done += n;
qemu_progress_print(100.0 * s->allocated_done /
s->allocated_sectors, 0);
}
if (status == BLK_DATA) {
ret = convert_co_read(s, sector_num, n, buf);
if (ret < 0) {
error_report("error while reading sector %" PRId64
": %s", sector_num, strerror(-ret));
s->ret = ret;
goto out;
}
} else if (!s->min_sparse && status == BLK_ZERO) {
status = BLK_DATA;
memset(buf, 0x00, n * BDRV_SECTOR_SIZE);
}
if (s->wr_in_order) {
/* keep writes in order */
while (s->wr_offs != sector_num) {
if (s->ret != -EINPROGRESS) {
goto out;
}
s->wait_sector_num[index] = sector_num;
qemu_coroutine_yield();
}
s->wait_sector_num[index] = -1;
}
ret = convert_co_write(s, sector_num, n, buf, status);
if (ret < 0) {
error_report("error while writing sector %" PRId64
": %s", sector_num, strerror(-ret));
s->ret = ret;
goto out;
}
if (s->wr_in_order) {
/* reenter the coroutine that might have waited
* for this write to complete */
s->wr_offs = sector_num + n;
for (i = 0; i < s->num_coroutines; i++) {
if (s->co[i] && s->wait_sector_num[i] == s->wr_offs) {
/*
* A -> B -> A cannot occur because A has
* s->wait_sector_num[i] == -1 during A -> B. Therefore
* B will never enter A during this time window.
*/
qemu_coroutine_enter(s->co[i]);
break;
}
}
}
}
out:
qemu_vfree(buf);
s->co[index] = NULL;
s->running_coroutines--;
if (!s->running_coroutines && s->ret == -EINPROGRESS) {
/* the convert job finished successfully */
s->ret = 0;
}
}
static int convert_do_copy(ImgConvertState *s)
{
uint8_t *buf = NULL;
int64_t sector_num, allocated_done;
int ret;
int n;
int ret, i, n;
int64_t sector_num = 0;
/* Check whether we have zero initialisation or can get it efficiently */
s->has_zero_init = s->min_sparse && !s->target_has_backing
@ -1691,21 +1841,15 @@ static int convert_do_copy(ImgConvertState *s)
if (s->compressed) {
if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) {
error_report("invalid cluster size");
ret = -EINVAL;
goto fail;
return -EINVAL;
}
s->buf_sectors = s->cluster_sectors;
}
buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE);
/* Calculate allocated sectors for progress */
s->allocated_sectors = 0;
sector_num = 0;
while (sector_num < s->total_sectors) {
n = convert_iteration_sectors(s, sector_num);
if (n < 0) {
ret = n;
goto fail;
return n;
}
if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO))
{
@ -1715,61 +1859,29 @@ static int convert_do_copy(ImgConvertState *s)
}
/* Do the copy */
s->src_cur = 0;
s->src_cur_offset = 0;
s->sector_next_status = 0;
s->ret = -EINPROGRESS;
sector_num = 0;
allocated_done = 0;
while (sector_num < s->total_sectors) {
n = convert_iteration_sectors(s, sector_num);
if (n < 0) {
ret = n;
goto fail;
}
if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO))
{
allocated_done += n;
qemu_progress_print(100.0 * allocated_done / s->allocated_sectors,
0);
}
if (s->status == BLK_DATA) {
ret = convert_read(s, sector_num, n, buf);
if (ret < 0) {
error_report("error while reading sector %" PRId64
": %s", sector_num, strerror(-ret));
goto fail;
}
} else if (!s->min_sparse && s->status == BLK_ZERO) {
n = MIN(n, s->buf_sectors);
memset(buf, 0, n * BDRV_SECTOR_SIZE);
s->status = BLK_DATA;
}
ret = convert_write(s, sector_num, n, buf);
if (ret < 0) {
error_report("error while writing sector %" PRId64
": %s", sector_num, strerror(-ret));
goto fail;
}
sector_num += n;
qemu_co_mutex_init(&s->lock);
for (i = 0; i < s->num_coroutines; i++) {
s->co[i] = qemu_coroutine_create(convert_co_do_copy, s);
s->wait_sector_num[i] = -1;
qemu_coroutine_enter(s->co[i]);
}
if (s->compressed) {
while (s->ret == -EINPROGRESS) {
main_loop_wait(false);
}
if (s->compressed && !s->ret) {
/* signal EOF to align */
ret = blk_pwrite_compressed(s->target, 0, NULL, 0);
if (ret < 0) {
goto fail;
return ret;
}
}
ret = 0;
fail:
qemu_vfree(buf);
return ret;
return s->ret;
}
static int img_convert(int argc, char **argv)
@ -1797,6 +1909,8 @@ static int img_convert(int argc, char **argv)
QemuOpts *sn_opts = NULL;
ImgConvertState state;
bool image_opts = false;
bool wr_in_order = true;
long num_coroutines = 8;
fmt = NULL;
out_fmt = "raw";
@ -1812,7 +1926,7 @@ static int img_convert(int argc, char **argv)
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn",
c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qnm:W",
long_options, NULL);
if (c == -1) {
break;
@ -1904,6 +2018,18 @@ static int img_convert(int argc, char **argv)
case 'n':
skip_create = 1;
break;
case 'm':
if (qemu_strtol(optarg, NULL, 0, &num_coroutines) ||
num_coroutines < 1 || num_coroutines > MAX_COROUTINES) {
error_report("Invalid number of coroutines. Allowed number of"
" coroutines is between 1 and %d", MAX_COROUTINES);
ret = -1;
goto fail_getopt;
}
break;
case 'W':
wr_in_order = false;
break;
case OPTION_OBJECT:
opts = qemu_opts_parse_noisily(&qemu_object_opts,
optarg, true);
@ -1923,6 +2049,12 @@ static int img_convert(int argc, char **argv)
goto fail_getopt;
}
if (!wr_in_order && compress) {
error_report("Out of order write and compress are mutually exclusive");
ret = -1;
goto fail_getopt;
}
/* Initialize before goto out */
if (quiet) {
progress = 0;
@ -2163,6 +2295,8 @@ static int img_convert(int argc, char **argv)
.min_sparse = min_sparse,
.cluster_sectors = cluster_sectors,
.buf_sectors = bufsectors,
.wr_in_order = wr_in_order,
.num_coroutines = num_coroutines,
};
ret = convert_do_copy(&state);
@ -3289,7 +3423,7 @@ static int img_resize(int argc, char **argv)
qemu_opts_del(param);
blk = img_open(image_opts, filename, fmt,
BDRV_O_RDWR, false, quiet);
BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet);
if (!blk) {
ret = -1;
goto out;

16
qemu-img.texi
View File

@ -137,6 +137,12 @@ Parameters to convert subcommand:
@item -n
Skip the creation of the target volume
@item -m
Number of parallel coroutines for the convert process
@item -W
Allow out-of-order writes to the destination. This option improves performance,
but is only recommended for preallocated devices like host devices or other
raw block devices.
@end table
Parameters to dd subcommand:
@ -296,7 +302,7 @@ Error on reading data
@end table
@item convert [-c] [-p] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
@item convert [-c] [-p] [-n] [-f @var{fmt}] [-t @var{cache}] [-T @var{src_cache}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_id_or_name}] [-l @var{snapshot_param}] [-m @var{num_coroutines}] [-W] [-S @var{sparse_size}] @var{filename} [@var{filename2} [...]] @var{output_filename}
Convert the disk image @var{filename} or a snapshot @var{snapshot_param}(@var{snapshot_id_or_name} is deprecated)
to disk image @var{output_filename} using format @var{output_fmt}. It can be optionally compressed (@code{-c}
@ -326,6 +332,14 @@ skipped. This is useful for formats such as @code{rbd} if the target
volume has already been created with site specific options that cannot
be supplied through qemu-img.
Out of order writes can be enabled with @code{-W} to improve performance.
This is only recommended for preallocated devices like host devices or other
raw block devices. Out of order write does not work in combination with
creating compressed images.
@var{num_coroutines} specifies how many coroutines work in parallel during
the convert process (defaults to 8).
@item dd [-f @var{fmt}] [-O @var{output_fmt}] [bs=@var{block_size}] [count=@var{blocks}] [skip=@var{blocks}] if=@var{input} of=@var{output}
Dd copies from @var{input} file to @var{output} file converting it from

28
qemu-io-cmds.c
View File

@ -83,6 +83,29 @@ static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc,
}
return 0;
}
/* Request additional permissions if necessary for this command. The caller
* is responsible for restoring the original permissions afterwards if this
* is what it wants. */
if (ct->perm && blk_is_available(blk)) {
uint64_t orig_perm, orig_shared_perm;
blk_get_perm(blk, &orig_perm, &orig_shared_perm);
if (ct->perm & ~orig_perm) {
uint64_t new_perm;
Error *local_err = NULL;
int ret;
new_perm = orig_perm | ct->perm;
ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
if (ret < 0) {
error_report_err(local_err);
return 0;
}
}
}
optind = 0;
return ct->cfunc(blk, argc, argv);
}
@ -918,6 +941,7 @@ static const cmdinfo_t write_cmd = {
.name = "write",
.altname = "w",
.cfunc = write_f,
.perm = BLK_PERM_WRITE,
.argmin = 2,
.argmax = -1,
.args = "[-bcCfquz] [-P pattern] off len",
@ -1093,6 +1117,7 @@ static int writev_f(BlockBackend *blk, int argc, char **argv);
static const cmdinfo_t writev_cmd = {
.name = "writev",
.cfunc = writev_f,
.perm = BLK_PERM_WRITE,
.argmin = 2,
.argmax = -1,
.args = "[-Cfq] [-P pattern] off len [len..]",
@ -1392,6 +1417,7 @@ static int aio_write_f(BlockBackend *blk, int argc, char **argv);
static const cmdinfo_t aio_write_cmd = {
.name = "aio_write",
.cfunc = aio_write_f,
.perm = BLK_PERM_WRITE,
.argmin = 2,
.argmax = -1,
.args = "[-Cfiquz] [-P pattern] off len [len..]",
@ -1556,6 +1582,7 @@ static const cmdinfo_t truncate_cmd = {
.name = "truncate",
.altname = "t",
.cfunc = truncate_f,
.perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
.argmin = 1,
.argmax = 1,
.args = "off",
@ -1653,6 +1680,7 @@ static const cmdinfo_t discard_cmd = {
.name = "discard",
.altname = "d",
.cfunc = discard_f,
.perm = BLK_PERM_WRITE,
.argmin = 2,
.argmax = -1,
.args = "[-Cq] off len",

14
tests/qemu-iotests/049.out
View File

@ -95,14 +95,14 @@ qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- -1024
qemu-img: Image size must be less than 8 EiB!
qemu-img create -f qcow2 -o size=-1024 TEST_DIR/t.qcow2
qemu-img: Parameter 'size' expects a non-negative number below 2^64
qemu-img: Value '-1024' is out of range for parameter 'size'
qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- -1k
qemu-img: Image size must be less than 8 EiB!
qemu-img create -f qcow2 -o size=-1k TEST_DIR/t.qcow2
qemu-img: Parameter 'size' expects a non-negative number below 2^64
qemu-img: Value '-1k' is out of range for parameter 'size'
qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- 1kilobyte
@ -110,15 +110,19 @@ qemu-img: Invalid image size specified! You may use k, M, G, T, P or E suffixes
qemu-img: kilobytes, megabytes, gigabytes, terabytes, petabytes and exabytes.
qemu-img create -f qcow2 -o size=1kilobyte TEST_DIR/t.qcow2
Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
qemu-img: Parameter 'size' expects a non-negative number below 2^64
Optional suffix k, M, G, T, P or E means kilo-, mega-, giga-, tera-, peta-
and exabytes, respectively.
qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- foobar
qemu-img: Invalid image size specified! You may use k, M, G, T, P or E suffixes for
qemu-img: kilobytes, megabytes, gigabytes, terabytes, petabytes and exabytes.
qemu-img create -f qcow2 -o size=foobar TEST_DIR/t.qcow2
qemu-img: Parameter 'size' expects a size
You may use k, M, G or T suffixes for kilobytes, megabytes, gigabytes and terabytes.
qemu-img: Parameter 'size' expects a non-negative number below 2^64
Optional suffix k, M, G, T, P or E means kilo-, mega-, giga-, tera-, peta-
and exabytes, respectively.
qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
== Check correct interpretation of suffixes for cluster size ==

6
tests/qemu-iotests/051.pc.out
View File

@ -179,7 +179,7 @@ qququiquit
Testing: -drive file=TEST_DIR/t.qcow2,if=ide,readonly=on
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) QEMU_PROG: Can't use a read-only drive
(qemu) QEMU_PROG: Block node is read-only
QEMU_PROG: Initialization of device ide-hd failed: Device initialization failed.
Testing: -drive file=TEST_DIR/t.qcow2,if=scsi,readonly=on
@ -201,12 +201,12 @@ QEMU X.Y.Z monitor - type 'help' for more information
Testing: -drive file=TEST_DIR/t.qcow2,if=none,id=disk,readonly=on -device ide-drive,drive=disk
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) QEMU_PROG: -device ide-drive,drive=disk: Can't use a read-only drive
(qemu) QEMU_PROG: -device ide-drive,drive=disk: Block node is read-only
QEMU_PROG: -device ide-drive,drive=disk: Device initialization failed.
Testing: -drive file=TEST_DIR/t.qcow2,if=none,id=disk,readonly=on -device ide-hd,drive=disk
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) QEMU_PROG: -device ide-hd,drive=disk: Can't use a read-only drive
(qemu) QEMU_PROG: -device ide-hd,drive=disk: Block node is read-only
QEMU_PROG: -device ide-hd,drive=disk: Device initialization failed.
Testing: -drive file=TEST_DIR/t.qcow2,if=none,id=disk,readonly=on -device lsi53c895a -device scsi-disk,drive=disk

11
tests/qemu-iotests/055
View File

@ -48,7 +48,8 @@ class TestSingleDrive(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
if iotests.qemu_default_machine == 'pc':
self.vm.add_drive(None, 'media=cdrom', 'ide')
self.vm.launch()
@ -164,7 +165,8 @@ class TestSetSpeed(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
self.vm.launch()
def tearDown(self):
@ -247,7 +249,8 @@ class TestSingleTransaction(iotests.QMPTestCase):
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(image_len))
self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
self.vm = iotests.VM().add_drive(test_img)
self.vm.add_drive(blockdev_target_img, interface="none")
if iotests.qemu_default_machine == 'pc':
self.vm.add_drive(None, 'media=cdrom', 'ide')
self.vm.launch()
@ -460,7 +463,7 @@ class TestDriveCompression(iotests.QMPTestCase):
qemu_img('create', '-f', fmt, blockdev_target_img,
str(TestDriveCompression.image_len), *args)
self.vm.add_drive(blockdev_target_img, format=fmt)
self.vm.add_drive(blockdev_target_img, format=fmt, interface="none")
self.vm.launch()

2
tests/qemu-iotests/085.out
View File

@ -74,7 +74,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/
=== Invalid command - snapshot node used as backing hd ===
{"error": {"class": "GenericError", "desc": "Node 'snap_11' is busy: node is used as backing hd of 'virtio0'"}}
{"error": {"class": "GenericError", "desc": "Node 'snap_11' is busy: node is used as backing hd of 'snap_12'"}}
=== Invalid command - snapshot node has a backing image ===

2
tests/qemu-iotests/141
View File

@ -67,7 +67,7 @@ test_blockjob()
_send_qemu_cmd $QEMU_HANDLE \
"{'execute': 'x-blockdev-del',
'arguments': {'node-name': 'drv0'}}" \
'error'
'error' | _filter_generated_node_ids
_send_qemu_cmd $QEMU_HANDLE \
"{'execute': 'block-job-cancel',

4
tests/qemu-iotests/141.out
View File

@ -20,7 +20,7 @@ Formatting 'TEST_DIR/o.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.
Formatting 'TEST_DIR/o.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT backing_fmt=IMGFMT
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "mirror"}}
{"return": {}}
{"error": {"class": "GenericError", "desc": "Node drv0 is in use"}}
{"error": {"class": "GenericError", "desc": "Node 'drv0' is busy: node is used as backing hd of 'NODE_NAME'"}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "mirror"}}
{"return": {}}
@ -30,7 +30,7 @@ Formatting 'TEST_DIR/o.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}}
{"return": {}}
{"error": {"class": "GenericError", "desc": "Node drv0 is in use"}}
{"error": {"class": "GenericError", "desc": "Node 'drv0' is busy: node is used as backing hd of 'NODE_NAME'"}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job0", "len": 0, "offset": 0, "speed": 0, "type": "commit"}}
{"return": {}}

53
tests/qemu-iotests/172.out
View File

@ -28,6 +28,7 @@ Testing:
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
@ -57,6 +58,7 @@ Testing: -fda TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fdb TEST_DIR/t.qcow2
@ -83,6 +85,7 @@ Testing: -fdb TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -93,6 +96,7 @@ Testing: -fdb TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2
@ -119,6 +123,7 @@ Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -129,6 +134,7 @@ Testing: -fda TEST_DIR/t.qcow2 -fdb TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
@ -158,6 +164,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
@ -184,6 +191,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -194,6 +202,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=floppy,file=TEST_DIR/t.qcow2,index=1
@ -220,6 +229,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=floppy,file=TEST_DIR/t
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -230,6 +240,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=floppy,file=TEST_DIR/t
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
@ -259,6 +270,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0
@ -285,6 +297,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -global isa-fdc.driveB=none1
@ -311,6 +324,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -321,6 +335,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
@ -350,6 +365,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1
@ -376,6 +392,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0 -device floppy,drive=none1,unit=1
@ -402,6 +419,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -412,6 +430,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
@ -441,6 +460,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -451,6 +471,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0
@ -477,6 +498,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -487,6 +509,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0
@ -513,6 +536,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0
@ -539,6 +563,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
@ -568,6 +593,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -578,6 +604,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1
@ -604,6 +631,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -614,6 +642,7 @@ Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0
@ -640,6 +669,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 1 (0x1)
@ -650,6 +680,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0
@ -676,6 +707,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 1 (0x1)
@ -686,6 +718,7 @@ Testing: -fdb TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device flop
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -fda TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0
@ -723,6 +756,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -733,6 +767,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=1
@ -759,6 +794,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -769,6 +805,7 @@ Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.q
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=floppy,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,unit=0
@ -802,6 +839,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -812,6 +850,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=1
@ -838,6 +877,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 0 (0x0)
@ -848,6 +888,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1
@ -874,6 +915,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 1 (0x1)
@ -884,6 +926,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveB=none0 -device floppy,drive=none1,unit=0
@ -910,6 +953,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
dev: floppy, id ""
unit = 1 (0x1)
@ -920,6 +964,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qco
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -drive if=none,file=TEST_DIR/t.qcow2 -global isa-fdc.driveA=none0 -device floppy,drive=none1,unit=0
@ -964,6 +1009,7 @@ Testing: -device floppy
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
Testing: -device floppy,drive-type=120
@ -990,6 +1036,7 @@ Testing: -device floppy,drive-type=120
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "120"
Testing: -device floppy,drive-type=144
@ -1016,6 +1063,7 @@ Testing: -device floppy,drive-type=144
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -device floppy,drive-type=288
@ -1042,6 +1090,7 @@ Testing: -device floppy,drive-type=288
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
@ -1071,6 +1120,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,drive-t
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "120"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,drive-type=288
@ -1097,6 +1147,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,drive-t
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "288"
@ -1126,6 +1177,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,logical
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,physical_block_size=512
@ -1152,6 +1204,7 @@ Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,physica
opt_io_size = 0 (0x0)
discard_granularity = 4294967295 (0xffffffff)
write-cache = "auto"
share-rw = false
drive-type = "144"
Testing: -drive if=none,file=TEST_DIR/t.qcow2 -device floppy,drive=none0,logical_block_size=4096

6
tests/test-blockjob-txn.c
View File

@ -101,9 +101,9 @@ static BlockJob *test_block_job_start(unsigned int iterations,
g_assert_nonnull(bs);
snprintf(job_id, sizeof(job_id), "job%u", counter++);
s = block_job_create(job_id, &test_block_job_driver, bs, 0,
BLOCK_JOB_DEFAULT, test_block_job_cb,
data, &error_abort);
s = block_job_create(job_id, &test_block_job_driver, bs,
0, BLK_PERM_ALL, 0, BLOCK_JOB_DEFAULT,
test_block_job_cb, data, &error_abort);
s->iterations = iterations;
s->use_timer = use_timer;
s->rc = rc;

10
tests/test-blockjob.c
View File

@ -30,8 +30,9 @@ static BlockJob *do_test_id(BlockBackend *blk, const char *id,
BlockJob *job;
Error *errp = NULL;
job = block_job_create(id, &test_block_job_driver, blk_bs(blk), 0,
BLOCK_JOB_DEFAULT, block_job_cb, NULL, &errp);
job = block_job_create(id, &test_block_job_driver, blk_bs(blk),
0, BLK_PERM_ALL, 0, BLOCK_JOB_DEFAULT, block_job_cb,
NULL, &errp);
if (should_succeed) {
g_assert_null(errp);
g_assert_nonnull(job);
@ -53,13 +54,14 @@ static BlockJob *do_test_id(BlockBackend *blk, const char *id,
* BlockDriverState inserted. */
static BlockBackend *create_blk(const char *name)
{
BlockBackend *blk = blk_new();
/* No I/O is performed on this device */
BlockBackend *blk = blk_new(0, BLK_PERM_ALL);
BlockDriverState *bs;
bs = bdrv_open("null-co://", NULL, NULL, 0, &error_abort);
g_assert_nonnull(bs);
blk_insert_bs(blk, bs);
blk_insert_bs(blk, bs, &error_abort);
bdrv_unref(bs);
if (name) {

7
tests/test-throttle.c
View File

@ -593,9 +593,10 @@ static void test_groups(void)
BlockBackend *blk1, *blk2, *blk3;
BlockBackendPublic *blkp1, *blkp2, *blkp3;
blk1 = blk_new();
blk2 = blk_new();
blk3 = blk_new();
/* No actual I/O is performed on these devices */
blk1 = blk_new(0, BLK_PERM_ALL);
blk2 = blk_new(0, BLK_PERM_ALL);
blk3 = blk_new(0, BLK_PERM_ALL);
blkp1 = blk_get_public(blk1);
blkp2 = blk_get_public(blk2);

2
util/qemu-option.c
View File

@ -179,7 +179,7 @@ void parse_option_size(const char *name, const char *value,
err = qemu_strtosz(value, NULL, &size);
if (err == -ERANGE) {
error_setg(errp, "Value '%s' is too large for parameter '%s'",
error_setg(errp, "Value '%s' is out of range for parameter '%s'",
value, name);
return;
}