* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include "config-host.h"
+#include "qemu/osdep.h"
#include "qemu-common.h"
#include "trace.h"
#include "block/block_int.h"
#include "block/throttle-groups.h"
#ifdef CONFIG_BSD
-#include <sys/types.h>
-#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#ifndef __DragonFly__
#include <windows.h>
#endif
-/**
- * A BdrvDirtyBitmap can be in three possible states:
- * (1) successor is NULL and disabled is false: full r/w mode
- * (2) successor is NULL and disabled is true: read only mode ("disabled")
- * (3) successor is set: frozen mode.
- * A frozen bitmap cannot be renamed, deleted, anonymized, cleared, set,
- * or enabled. A frozen bitmap can only abdicate() or reclaim().
- */
-struct BdrvDirtyBitmap {
- HBitmap *bitmap; /* Dirty sector bitmap implementation */
- BdrvDirtyBitmap *successor; /* Anonymous child; implies frozen status */
- char *name; /* Optional non-empty unique ID */
- int64_t size; /* Size of the bitmap (Number of sectors) */
- bool disabled; /* Bitmap is read-only */
- QLIST_ENTRY(BdrvDirtyBitmap) list;
-};
-
#define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
struct BdrvStates bdrv_states = QTAILQ_HEAD_INITIALIZER(bdrv_states);
static QTAILQ_HEAD(, BlockDriverState) graph_bdrv_states =
QTAILQ_HEAD_INITIALIZER(graph_bdrv_states);
+static QTAILQ_HEAD(, BlockDriverState) all_bdrv_states =
+ QTAILQ_HEAD_INITIALIZER(all_bdrv_states);
+
static QLIST_HEAD(, BlockDriver) bdrv_drivers =
QLIST_HEAD_INITIALIZER(bdrv_drivers);
BlockDriverState *parent,
const BdrvChildRole *child_role, Error **errp);
-static void bdrv_dirty_bitmap_truncate(BlockDriverState *bs);
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
+static void bdrv_close(BlockDriverState *bs);
+
#ifdef _WIN32
static int is_windows_drive_prefix(const char *filename)
{
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
QLIST_INIT(&bs->op_blockers[i]);
}
- notifier_list_init(&bs->close_notifiers);
notifier_with_return_list_init(&bs->before_write_notifiers);
qemu_co_queue_init(&bs->throttled_reqs[0]);
qemu_co_queue_init(&bs->throttled_reqs[1]);
bs->refcnt = 1;
bs->aio_context = qemu_get_aio_context();
- return bs;
-}
+ QTAILQ_INSERT_TAIL(&all_bdrv_states, bs, bs_list);
-void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify)
-{
- notifier_list_add(&bs->close_notifiers, notify);
+ return bs;
}
BlockDriver *bdrv_find_format(const char *format_name)
}
/*
- * Returns the flags that a temporary snapshot should get, based on the
- * originally requested flags (the originally requested image will have flags
- * like a backing file)
+ * Returns the options and flags that a temporary snapshot should get, based on
+ * the originally requested flags (the originally requested image will have
+ * flags like a backing file)
*/
-static int bdrv_temp_snapshot_flags(int flags)
+static void bdrv_temp_snapshot_options(int *child_flags, QDict *child_options,
+ int parent_flags, QDict *parent_options)
{
- return (flags & ~BDRV_O_SNAPSHOT) | BDRV_O_TEMPORARY;
+ *child_flags = (parent_flags & ~BDRV_O_SNAPSHOT) | BDRV_O_TEMPORARY;
+
+ /* For temporary files, unconditional cache=unsafe is fine */
+ qdict_set_default_str(child_options, BDRV_OPT_CACHE_WB, "on");
+ qdict_set_default_str(child_options, BDRV_OPT_CACHE_DIRECT, "off");
+ qdict_set_default_str(child_options, BDRV_OPT_CACHE_NO_FLUSH, "on");
}
/*
* Removes all processed options from *options.
*/
static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
- QDict *options, int flags, Error **errp)
+ QDict *options, Error **errp)
{
int ret, open_flags;
const char *filename;
goto fail_opts;
}
- trace_bdrv_open_common(bs, filename ?: "", flags, drv->format_name);
+ trace_bdrv_open_common(bs, filename ?: "", bs->open_flags,
+ drv->format_name);
node_name = qemu_opt_get(opts, "node-name");
bdrv_assign_node_name(bs, node_name, &local_err);
bs->request_alignment = 512;
bs->zero_beyond_eof = true;
- open_flags = bdrv_open_flags(bs, flags);
- bs->read_only = !(open_flags & BDRV_O_RDWR);
+ bs->read_only = !(bs->open_flags & BDRV_O_RDWR);
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) {
error_setg(errp,
}
assert(bs->copy_on_read == 0); /* bdrv_new() and bdrv_close() make it so */
- if (flags & BDRV_O_COPY_ON_READ) {
+ if (bs->open_flags & BDRV_O_COPY_ON_READ) {
if (!bs->read_only) {
bdrv_enable_copy_on_read(bs);
} else {
bdrv_set_enable_write_cache(bs, bs->open_flags & BDRV_O_CACHE_WB);
/* Open the image, either directly or using a protocol */
+ open_flags = bdrv_open_flags(bs, bs->open_flags);
if (drv->bdrv_file_open) {
assert(file == NULL);
assert(!drv->bdrv_needs_filename || filename != NULL);
}
}
- if (runstate_check(RUN_STATE_INMIGRATE)) {
- *flags |= BDRV_O_INCOMING;
- }
-
return 0;
}
ret = bdrv_open_inherit(&backing_hd,
*backing_filename ? backing_filename : NULL,
reference, options, 0, bs, &child_backing,
- &local_err);
+ errp);
if (ret < 0) {
bs->open_flags |= BDRV_O_NO_BACKING;
- error_setg(errp, "Could not open backing file: %s",
- error_get_pretty(local_err));
- error_free(local_err);
+ error_prepend(errp, "Could not open backing file: ");
goto free_exit;
}
return c;
}
-int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
+static int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags,
+ QDict *snapshot_options, Error **errp)
{
/* TODO: extra byte is a hack to ensure MAX_PATH space on Windows. */
char *tmp_filename = g_malloc0(PATH_MAX + 1);
int64_t total_size;
QemuOpts *opts = NULL;
- QDict *snapshot_options;
BlockDriverState *bs_snapshot;
Error *local_err = NULL;
int ret;
opts = qemu_opts_create(bdrv_qcow2.create_opts, NULL, 0,
&error_abort);
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_size, &error_abort);
- ret = bdrv_create(&bdrv_qcow2, tmp_filename, opts, &local_err);
+ ret = bdrv_create(&bdrv_qcow2, tmp_filename, opts, errp);
qemu_opts_del(opts);
if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not create temporary overlay "
- "'%s': %s", tmp_filename,
- error_get_pretty(local_err));
- error_free(local_err);
+ error_prepend(errp, "Could not create temporary overlay '%s': ",
+ tmp_filename);
goto out;
}
- /* Prepare a new options QDict for the temporary file */
- snapshot_options = qdict_new();
+ /* Prepare options QDict for the temporary file */
qdict_put(snapshot_options, "file.driver",
qstring_from_str("file"));
qdict_put(snapshot_options, "file.filename",
ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options,
flags, &local_err);
+ snapshot_options = NULL;
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
bdrv_append(bs_snapshot, bs);
out:
+ QDECREF(snapshot_options);
g_free(tmp_filename);
return ret;
}
const char *drvname;
const char *backing;
Error *local_err = NULL;
+ QDict *snapshot_options = NULL;
int snapshot_flags = 0;
assert(pbs);
flags |= BDRV_O_ALLOW_RDWR;
}
if (flags & BDRV_O_SNAPSHOT) {
- snapshot_flags = bdrv_temp_snapshot_flags(flags);
+ snapshot_options = qdict_new();
+ bdrv_temp_snapshot_options(&snapshot_flags, snapshot_options,
+ flags, options);
bdrv_backing_options(&flags, options, flags, options);
}
assert(!(flags & BDRV_O_PROTOCOL) || !file);
/* Open the image */
- ret = bdrv_open_common(bs, file, options, flags, &local_err);
+ ret = bdrv_open_common(bs, file, options, &local_err);
if (ret < 0) {
goto fail;
}
/* For snapshot=on, create a temporary qcow2 overlay. bs points to the
* temporary snapshot afterwards. */
if (snapshot_flags) {
- ret = bdrv_append_temp_snapshot(bs, snapshot_flags, &local_err);
+ ret = bdrv_append_temp_snapshot(bs, snapshot_flags, snapshot_options,
+ &local_err);
+ snapshot_options = NULL;
if (local_err) {
goto close_and_fail;
}
if (file != NULL) {
bdrv_unref_child(bs, file);
}
+ QDECREF(snapshot_options);
QDECREF(bs->explicit_options);
QDECREF(bs->options);
QDECREF(options);
} else {
bdrv_unref(bs);
}
+ QDECREF(snapshot_options);
QDECREF(options);
if (local_err) {
error_propagate(errp, local_err);
}
-void bdrv_close(BlockDriverState *bs)
+static void bdrv_close(BlockDriverState *bs)
{
BdrvAioNotifier *ban, *ban_next;
- if (bs->job) {
- block_job_cancel_sync(bs->job);
- }
+ assert(!bs->job);
/* Disable I/O limits and drain all pending throttled requests */
if (bs->throttle_state) {
bdrv_flush(bs);
bdrv_drain(bs); /* in case flush left pending I/O */
- notifier_list_notify(&bs->close_notifiers, bs);
+ bdrv_release_named_dirty_bitmaps(bs);
+ assert(QLIST_EMPTY(&bs->dirty_bitmaps));
if (bs->blk) {
blk_dev_change_media_cb(bs->blk, false);
void bdrv_close_all(void)
{
BlockDriverState *bs;
+ AioContext *aio_context;
- QTAILQ_FOREACH(bs, &bdrv_states, device_list) {
- AioContext *aio_context = bdrv_get_aio_context(bs);
+ /* Drop references from requests still in flight, such as canceled block
+ * jobs whose AIO context has not been polled yet */
+ bdrv_drain_all();
- aio_context_acquire(aio_context);
- bdrv_close(bs);
- aio_context_release(aio_context);
+ blk_remove_all_bs();
+ blockdev_close_all_bdrv_states();
+
+ /* Cancel all block jobs */
+ while (!QTAILQ_EMPTY(&all_bdrv_states)) {
+ QTAILQ_FOREACH(bs, &all_bdrv_states, bs_list) {
+ aio_context = bdrv_get_aio_context(bs);
+
+ aio_context_acquire(aio_context);
+ if (bs->job) {
+ block_job_cancel_sync(bs->job);
+ aio_context_release(aio_context);
+ break;
+ }
+ aio_context_release(aio_context);
+ }
+
+ /* All the remaining BlockDriverStates are referenced directly or
+ * indirectly from block jobs, so there needs to be at least one BDS
+ * directly used by a block job */
+ assert(bs);
}
}
+/* Note that bs->device_list.tqe_prev is initially null,
+ * and gets set to non-null by QTAILQ_INSERT_TAIL(). Establish
+ * the useful invariant "bs in bdrv_states iff bs->tqe_prev" by
+ * resetting it to null on remove. */
+void bdrv_device_remove(BlockDriverState *bs)
+{
+ QTAILQ_REMOVE(&bdrv_states, bs, device_list);
+ bs->device_list.tqe_prev = NULL;
+}
+
/* make a BlockDriverState anonymous by removing from bdrv_state and
* graph_bdrv_state list.
Also, NULL terminate the device_name to prevent double remove */
void bdrv_make_anon(BlockDriverState *bs)
{
- /*
- * Take care to remove bs from bdrv_states only when it's actually
- * in it. Note that bs->device_list.tqe_prev is initially null,
- * and gets set to non-null by QTAILQ_INSERT_TAIL(). Establish
- * the useful invariant "bs in bdrv_states iff bs->tqe_prev" by
- * resetting it to null on remove.
- */
+ /* Take care to remove bs from bdrv_states only when it's actually
+ * in it. */
if (bs->device_list.tqe_prev) {
- QTAILQ_REMOVE(&bdrv_states, bs, device_list);
- bs->device_list.tqe_prev = NULL;
+ bdrv_device_remove(bs);
}
if (bs->node_name[0] != '\0') {
QTAILQ_REMOVE(&graph_bdrv_states, bs, node_list);
if (!to->device_list.tqe_prev) {
QTAILQ_INSERT_BEFORE(from, to, device_list);
}
- QTAILQ_REMOVE(&bdrv_states, from, device_list);
+ bdrv_device_remove(from);
}
}
assert(!bs->job);
assert(bdrv_op_blocker_is_empty(bs));
assert(!bs->refcnt);
- assert(QLIST_EMPTY(&bs->dirty_bitmaps));
bdrv_close(bs);
/* remove from list, if necessary */
bdrv_make_anon(bs);
+ QTAILQ_REMOVE(&all_bdrv_states, bs, bs_list);
+
g_free(bs);
}
return;
}
- if (!(bs->open_flags & BDRV_O_INCOMING)) {
+ if (!(bs->open_flags & BDRV_O_INACTIVE)) {
return;
}
- bs->open_flags &= ~BDRV_O_INCOMING;
+ bs->open_flags &= ~BDRV_O_INACTIVE;
if (bs->drv->bdrv_invalidate_cache) {
bs->drv->bdrv_invalidate_cache(bs, &local_err);
bdrv_invalidate_cache(bs->file->bs, &local_err);
}
if (local_err) {
+ bs->open_flags |= BDRV_O_INACTIVE;
error_propagate(errp, local_err);
return;
}
ret = refresh_total_sectors(bs, bs->total_sectors);
if (ret < 0) {
+ bs->open_flags |= BDRV_O_INACTIVE;
error_setg_errno(errp, -ret, "Could not refresh total sector count");
return;
}
}
}
+static int bdrv_inactivate(BlockDriverState *bs)
+{
+ int ret;
+
+ if (bs->drv->bdrv_inactivate) {
+ ret = bs->drv->bdrv_inactivate(bs);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ bs->open_flags |= BDRV_O_INACTIVE;
+ return 0;
+}
+
+int bdrv_inactivate_all(void)
+{
+ BlockDriverState *bs;
+ int ret;
+
+ QTAILQ_FOREACH(bs, &bdrv_states, device_list) {
+ AioContext *aio_context = bdrv_get_aio_context(bs);
+
+ aio_context_acquire(aio_context);
+ ret = bdrv_inactivate(bs);
+ aio_context_release(aio_context);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
/**************************************************************/
/* removable device support */
}
}
-BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name)
-{
- BdrvDirtyBitmap *bm;
-
- assert(name);
- QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
- if (bm->name && !strcmp(name, bm->name)) {
- return bm;
- }
- }
- return NULL;
-}
-
-void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap)
-{
- assert(!bdrv_dirty_bitmap_frozen(bitmap));
- g_free(bitmap->name);
- bitmap->name = NULL;
-}
-
-BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
- uint32_t granularity,
- const char *name,
- Error **errp)
-{
- int64_t bitmap_size;
- BdrvDirtyBitmap *bitmap;
- uint32_t sector_granularity;
-
- assert((granularity & (granularity - 1)) == 0);
-
- if (name && bdrv_find_dirty_bitmap(bs, name)) {
- error_setg(errp, "Bitmap already exists: %s", name);
- return NULL;
- }
- sector_granularity = granularity >> BDRV_SECTOR_BITS;
- assert(sector_granularity);
- bitmap_size = bdrv_nb_sectors(bs);
- if (bitmap_size < 0) {
- error_setg_errno(errp, -bitmap_size, "could not get length of device");
- errno = -bitmap_size;
- return NULL;
- }
- bitmap = g_new0(BdrvDirtyBitmap, 1);
- bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(sector_granularity));
- bitmap->size = bitmap_size;
- bitmap->name = g_strdup(name);
- bitmap->disabled = false;
- QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list);
- return bitmap;
-}
-
-bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap)
-{
- return bitmap->successor;
-}
-
-bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
-{
- return !(bitmap->disabled || bitmap->successor);
-}
-
-DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
-{
- if (bdrv_dirty_bitmap_frozen(bitmap)) {
- return DIRTY_BITMAP_STATUS_FROZEN;
- } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
- return DIRTY_BITMAP_STATUS_DISABLED;
- } else {
- return DIRTY_BITMAP_STATUS_ACTIVE;
- }
-}
-
-/**
- * Create a successor bitmap destined to replace this bitmap after an operation.
- * Requires that the bitmap is not frozen and has no successor.
- */
-int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
- BdrvDirtyBitmap *bitmap, Error **errp)
-{
- uint64_t granularity;
- BdrvDirtyBitmap *child;
-
- if (bdrv_dirty_bitmap_frozen(bitmap)) {
- error_setg(errp, "Cannot create a successor for a bitmap that is "
- "currently frozen");
- return -1;
- }
- assert(!bitmap->successor);
-
- /* Create an anonymous successor */
- granularity = bdrv_dirty_bitmap_granularity(bitmap);
- child = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
- if (!child) {
- return -1;
- }
-
- /* Successor will be on or off based on our current state. */
- child->disabled = bitmap->disabled;
-
- /* Install the successor and freeze the parent */
- bitmap->successor = child;
- return 0;
-}
-
-/**
- * For a bitmap with a successor, yield our name to the successor,
- * delete the old bitmap, and return a handle to the new bitmap.
- */
-BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
- BdrvDirtyBitmap *bitmap,
- Error **errp)
-{
- char *name;
- BdrvDirtyBitmap *successor = bitmap->successor;
-
- if (successor == NULL) {
- error_setg(errp, "Cannot relinquish control if "
- "there's no successor present");
- return NULL;
- }
-
- name = bitmap->name;
- bitmap->name = NULL;
- successor->name = name;
- bitmap->successor = NULL;
- bdrv_release_dirty_bitmap(bs, bitmap);
-
- return successor;
-}
-
-/**
- * In cases of failure where we can no longer safely delete the parent,
- * we may wish to re-join the parent and child/successor.
- * The merged parent will be un-frozen, but not explicitly re-enabled.
- */
-BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
- BdrvDirtyBitmap *parent,
- Error **errp)
-{
- BdrvDirtyBitmap *successor = parent->successor;
-
- if (!successor) {
- error_setg(errp, "Cannot reclaim a successor when none is present");
- return NULL;
- }
-
- if (!hbitmap_merge(parent->bitmap, successor->bitmap)) {
- error_setg(errp, "Merging of parent and successor bitmap failed");
- return NULL;
- }
- bdrv_release_dirty_bitmap(bs, successor);
- parent->successor = NULL;
-
- return parent;
-}
-
-/**
- * Truncates _all_ bitmaps attached to a BDS.
- */
-static void bdrv_dirty_bitmap_truncate(BlockDriverState *bs)
-{
- BdrvDirtyBitmap *bitmap;
- uint64_t size = bdrv_nb_sectors(bs);
-
- QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
- assert(!bdrv_dirty_bitmap_frozen(bitmap));
- hbitmap_truncate(bitmap->bitmap, size);
- bitmap->size = size;
- }
-}
-
-void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
-{
- BdrvDirtyBitmap *bm, *next;
- QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) {
- if (bm == bitmap) {
- assert(!bdrv_dirty_bitmap_frozen(bm));
- QLIST_REMOVE(bitmap, list);
- hbitmap_free(bitmap->bitmap);
- g_free(bitmap->name);
- g_free(bitmap);
- return;
- }
- }
-}
-
-void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
-{
- assert(!bdrv_dirty_bitmap_frozen(bitmap));
- bitmap->disabled = true;
-}
-
-void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
-{
- assert(!bdrv_dirty_bitmap_frozen(bitmap));
- bitmap->disabled = false;
-}
-
-BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
-{
- BdrvDirtyBitmap *bm;
- BlockDirtyInfoList *list = NULL;
- BlockDirtyInfoList **plist = &list;
-
- QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
- BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1);
- BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1);
- info->count = bdrv_get_dirty_count(bm);
- info->granularity = bdrv_dirty_bitmap_granularity(bm);
- info->has_name = !!bm->name;
- info->name = g_strdup(bm->name);
- info->status = bdrv_dirty_bitmap_status(bm);
- entry->value = info;
- *plist = entry;
- plist = &entry->next;
- }
-
- return list;
-}
-
-int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector)
-{
- if (bitmap) {
- return hbitmap_get(bitmap->bitmap, sector);
- } else {
- return 0;
- }
-}
-
-/**
- * Chooses a default granularity based on the existing cluster size,
- * but clamped between [4K, 64K]. Defaults to 64K in the case that there
- * is no cluster size information available.
- */
-uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs)
-{
- BlockDriverInfo bdi;
- uint32_t granularity;
-
- if (bdrv_get_info(bs, &bdi) >= 0 && bdi.cluster_size > 0) {
- granularity = MAX(4096, bdi.cluster_size);
- granularity = MIN(65536, granularity);
- } else {
- granularity = 65536;
- }
-
- return granularity;
-}
-
-uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap)
-{
- return BDRV_SECTOR_SIZE << hbitmap_granularity(bitmap->bitmap);
-}
-
-void bdrv_dirty_iter_init(BdrvDirtyBitmap *bitmap, HBitmapIter *hbi)
-{
- hbitmap_iter_init(hbi, bitmap->bitmap, 0);
-}
-
-void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
- int64_t cur_sector, int nr_sectors)
-{
- assert(bdrv_dirty_bitmap_enabled(bitmap));
- hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
-}
-
-void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap,
- int64_t cur_sector, int nr_sectors)
-{
- assert(bdrv_dirty_bitmap_enabled(bitmap));
- hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors);
-}
-
-void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out)
-{
- assert(bdrv_dirty_bitmap_enabled(bitmap));
- if (!out) {
- hbitmap_reset_all(bitmap->bitmap);
- } else {
- HBitmap *backup = bitmap->bitmap;
- bitmap->bitmap = hbitmap_alloc(bitmap->size,
- hbitmap_granularity(backup));
- *out = backup;
- }
-}
-
-void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in)
-{
- HBitmap *tmp = bitmap->bitmap;
- assert(bdrv_dirty_bitmap_enabled(bitmap));
- bitmap->bitmap = in;
- hbitmap_free(tmp);
-}
-
-void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
- int nr_sectors)
-{
- BdrvDirtyBitmap *bitmap;
- QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
- if (!bdrv_dirty_bitmap_enabled(bitmap)) {
- continue;
- }
- hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
- }
-}
-
-/**
- * Advance an HBitmapIter to an arbitrary offset.
- */
-void bdrv_set_dirty_iter(HBitmapIter *hbi, int64_t offset)
-{
- assert(hbi->hb);
- hbitmap_iter_init(hbi, hbi->hb, offset);
-}
-
-int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap)
-{
- return hbitmap_count(bitmap->bitmap);
-}
-
/* Get a reference to bs */
void bdrv_ref(BlockDriverState *bs)
{
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
if (errp) {
- error_setg(errp, "Node '%s' is busy: %s",
- bdrv_get_device_or_node_name(bs),
- error_get_pretty(blocker->reason));
+ *errp = error_copy(blocker->reason);
+ error_prepend(errp, "Node '%s' is busy: ",
+ bdrv_get_device_or_node_name(bs));
}
return true;
}
projects / mirror_qemu.git / blobdiff