X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=block.c;h=ecd09dbbfd89acbc6fd44adc8eb3641fd110abd9;hb=ca1a6b708ba2d94f2dd64bb8ec04223a708c9b40;hp=2a2d0696672207cbc97ee930c509658a49b54e4a;hpb=afd760539308a5524accf964107cdb1d54a059e3;p=mirror_qemu.git

diff --git a/block.c b/block.c
index 2a2d069667..ecd09dbbfd 100644
--- a/block.c
+++ b/block.c
@@ -106,7 +106,7 @@ size_t bdrv_opt_mem_align(BlockDriverState *bs)
 {
     if (!bs || !bs->drv) {
         /* page size or 4k (hdd sector size) should be on the safe side */
-        return MAX(4096, getpagesize());
+        return MAX(4096, qemu_real_host_page_size);
     }
 
     return bs->bl.opt_mem_alignment;
@@ -116,7 +116,7 @@ size_t bdrv_min_mem_align(BlockDriverState *bs)
 {
     if (!bs || !bs->drv) {
         /* page size or 4k (hdd sector size) should be on the safe side */
-        return MAX(4096, getpagesize());
+        return MAX(4096, qemu_real_host_page_size);
     }
 
     return bs->bl.min_mem_alignment;
@@ -1719,7 +1719,7 @@ typedef struct BlockReopenQueueEntry {
      bool prepared;
      bool perms_checked;
      BDRVReopenState state;
-     QSIMPLEQ_ENTRY(BlockReopenQueueEntry) entry;
+     QTAILQ_ENTRY(BlockReopenQueueEntry) entry;
 } BlockReopenQueueEntry;
 
 /*
@@ -1732,7 +1732,7 @@ static int bdrv_reopen_get_flags(BlockReopenQueue *q, BlockDriverState *bs)
     BlockReopenQueueEntry *entry;
 
     if (q != NULL) {
-        QSIMPLEQ_FOREACH(entry, q, entry) {
+        QTAILQ_FOREACH(entry, q, entry) {
             if (entry->state.bs == bs) {
                 return entry->state.flags;
             }
@@ -2227,6 +2227,24 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
     *nshared = shared;
 }
 
+uint64_t bdrv_qapi_perm_to_blk_perm(BlockPermission qapi_perm)
+{
+    static const uint64_t permissions[] = {
+        [BLOCK_PERMISSION_CONSISTENT_READ]  = BLK_PERM_CONSISTENT_READ,
+        [BLOCK_PERMISSION_WRITE]            = BLK_PERM_WRITE,
+        [BLOCK_PERMISSION_WRITE_UNCHANGED]  = BLK_PERM_WRITE_UNCHANGED,
+        [BLOCK_PERMISSION_RESIZE]           = BLK_PERM_RESIZE,
+        [BLOCK_PERMISSION_GRAPH_MOD]        = BLK_PERM_GRAPH_MOD,
+    };
+
+    QEMU_BUILD_BUG_ON(ARRAY_SIZE(permissions) != BLOCK_PERMISSION__MAX);
+    QEMU_BUILD_BUG_ON(1UL << ARRAY_SIZE(permissions) != BLK_PERM_ALL + 1);
+
+    assert(qapi_perm < BLOCK_PERMISSION__MAX);
+
+    return permissions[qapi_perm];
+}
+
 static void bdrv_replace_child_noperm(BdrvChild *child,
                                       BlockDriverState *new_bs)
 {
@@ -3019,6 +3037,8 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
                         "use \"backing\": null instead");
         }
         flags |= BDRV_O_NO_BACKING;
+        qdict_del(bs->explicit_options, "backing");
+        qdict_del(bs->options, "backing");
         qdict_del(options, "backing");
     }
 
@@ -3249,7 +3269,7 @@ static bool bdrv_recurse_has_child(BlockDriverState *bs,
  * Adds a BlockDriverState to a simple queue for an atomic, transactional
  * reopen of multiple devices.
  *
- * bs_queue can either be an existing BlockReopenQueue that has had QSIMPLE_INIT
+ * bs_queue can either be an existing BlockReopenQueue that has had QTAILQ_INIT
  * already performed, or alternatively may be NULL a new BlockReopenQueue will
  * be created and initialized. This newly created BlockReopenQueue should be
  * passed back in for subsequent calls that are intended to be of the same
@@ -3290,7 +3310,7 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
 
     if (bs_queue == NULL) {
         bs_queue = g_new0(BlockReopenQueue, 1);
-        QSIMPLEQ_INIT(bs_queue);
+        QTAILQ_INIT(bs_queue);
     }
 
     if (!options) {
@@ -3298,7 +3318,7 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
     }
 
     /* Check if this BlockDriverState is already in the queue */
-    QSIMPLEQ_FOREACH(bs_entry, bs_queue, entry) {
+    QTAILQ_FOREACH(bs_entry, bs_queue, entry) {
         if (bs == bs_entry->state.bs) {
             break;
         }
@@ -3354,7 +3374,7 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
 
     if (!bs_entry) {
         bs_entry = g_new0(BlockReopenQueueEntry, 1);
-        QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
+        QTAILQ_INSERT_TAIL(bs_queue, bs_entry, entry);
     } else {
         qobject_unref(bs_entry->state.options);
         qobject_unref(bs_entry->state.explicit_options);
@@ -3455,7 +3475,7 @@ int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp)
 
     assert(bs_queue != NULL);
 
-    QSIMPLEQ_FOREACH(bs_entry, bs_queue, entry) {
+    QTAILQ_FOREACH(bs_entry, bs_queue, entry) {
         assert(bs_entry->state.bs->quiesce_counter > 0);
         if (bdrv_reopen_prepare(&bs_entry->state, bs_queue, errp)) {
             goto cleanup;
@@ -3463,7 +3483,7 @@ int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp)
         bs_entry->prepared = true;
     }
 
-    QSIMPLEQ_FOREACH(bs_entry, bs_queue, entry) {
+    QTAILQ_FOREACH(bs_entry, bs_queue, entry) {
         BDRVReopenState *state = &bs_entry->state;
         ret = bdrv_check_perm(state->bs, bs_queue, state->perm,
                               state->shared_perm, NULL, NULL, errp);
@@ -3486,16 +3506,22 @@ int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp)
         bs_entry->perms_checked = true;
     }
 
-    /* If we reach this point, we have success and just need to apply the
-     * changes
+    /*
+     * If we reach this point, we have success and just need to apply the
+     * changes.
+     *
+     * Reverse order is used to comfort qcow2 driver: on commit it need to write
+     * IN_USE flag to the image, to mark bitmaps in the image as invalid. But
+     * children are usually goes after parents in reopen-queue, so go from last
+     * to first element.
      */
-    QSIMPLEQ_FOREACH(bs_entry, bs_queue, entry) {
+    QTAILQ_FOREACH_REVERSE(bs_entry, bs_queue, entry) {
         bdrv_reopen_commit(&bs_entry->state);
     }
 
     ret = 0;
 cleanup_perm:
-    QSIMPLEQ_FOREACH_SAFE(bs_entry, bs_queue, entry, next) {
+    QTAILQ_FOREACH_SAFE(bs_entry, bs_queue, entry, next) {
         BDRVReopenState *state = &bs_entry->state;
 
         if (!bs_entry->perms_checked) {
@@ -3512,7 +3538,7 @@ cleanup_perm:
         }
     }
 cleanup:
-    QSIMPLEQ_FOREACH_SAFE(bs_entry, bs_queue, entry, next) {
+    QTAILQ_FOREACH_SAFE(bs_entry, bs_queue, entry, next) {
         if (ret) {
             if (bs_entry->prepared) {
                 bdrv_reopen_abort(&bs_entry->state);
@@ -3552,7 +3578,7 @@ static BlockReopenQueueEntry *find_parent_in_reopen_queue(BlockReopenQueue *q,
 {
     BlockReopenQueueEntry *entry;
 
-    QSIMPLEQ_FOREACH(entry, q, entry) {
+    QTAILQ_FOREACH(entry, q, entry) {
         BlockDriverState *bs = entry->state.bs;
         BdrvChild *child;
 
@@ -3929,16 +3955,12 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state)
     BlockDriver *drv;
     BlockDriverState *bs;
     BdrvChild *child;
-    bool old_can_write, new_can_write;
 
     assert(reopen_state != NULL);
     bs = reopen_state->bs;
     drv = bs->drv;
     assert(drv != NULL);
 
-    old_can_write =
-        !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
-
     /* If there are any driver level actions to take */
     if (drv->bdrv_reopen_commit) {
         drv->bdrv_reopen_commit(reopen_state);
@@ -3982,21 +4004,6 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state)
     }
 
     bdrv_refresh_limits(bs, NULL);
-
-    new_can_write =
-        !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE);
-    if (!old_can_write && new_can_write && drv->bdrv_reopen_bitmaps_rw) {
-        Error *local_err = NULL;
-        if (drv->bdrv_reopen_bitmaps_rw(bs, &local_err) < 0) {
-            /* This is not fatal, bitmaps just left read-only, so all following
-             * writes will fail. User can remove read-only bitmaps to unblock
-             * writes.
-             */
-            error_reportf_err(local_err,
-                              "%s: Failed to make dirty bitmaps writable: ",
-                              bdrv_get_node_name(bs));
-        }
-    }
 }
 
 /*
@@ -4165,7 +4172,6 @@ void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
 {
     BdrvChild *c, *next;
     GSList *list = NULL, *p;
-    uint64_t old_perm, old_shared;
     uint64_t perm = 0, shared = BLK_PERM_ALL;
     int ret;
 
@@ -4211,8 +4217,8 @@ void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
         bdrv_unref(from);
     }
 
-    bdrv_get_cumulative_perm(to, &old_perm, &old_shared);
-    bdrv_set_perm(to, old_perm | perm, old_shared | shared);
+    bdrv_get_cumulative_perm(to, &perm, &shared);
+    bdrv_set_perm(to, perm, shared);
 
 out:
     g_slist_free(list);
@@ -4866,36 +4872,23 @@ static void xdbg_graph_add_node(XDbgBlockGraphConstructor *gr, void *node,
 static void xdbg_graph_add_edge(XDbgBlockGraphConstructor *gr, void *parent,
                                 const BdrvChild *child)
 {
-    typedef struct {
-        unsigned int flag;
-        BlockPermission num;
-    } PermissionMap;
-
-    static const PermissionMap permissions[] = {
-        { BLK_PERM_CONSISTENT_READ, BLOCK_PERMISSION_CONSISTENT_READ },
-        { BLK_PERM_WRITE,           BLOCK_PERMISSION_WRITE },
-        { BLK_PERM_WRITE_UNCHANGED, BLOCK_PERMISSION_WRITE_UNCHANGED },
-        { BLK_PERM_RESIZE,          BLOCK_PERMISSION_RESIZE },
-        { BLK_PERM_GRAPH_MOD,       BLOCK_PERMISSION_GRAPH_MOD },
-        { 0, 0 }
-    };
-    const PermissionMap *p;
+    BlockPermission qapi_perm;
     XDbgBlockGraphEdge *edge;
 
-    QEMU_BUILD_BUG_ON(1UL << (ARRAY_SIZE(permissions) - 1) != BLK_PERM_ALL + 1);
-
     edge = g_new0(XDbgBlockGraphEdge, 1);
 
     edge->parent = xdbg_graph_node_num(gr, parent);
     edge->child = xdbg_graph_node_num(gr, child->bs);
     edge->name = g_strdup(child->name);
 
-    for (p = permissions; p->flag; p++) {
-        if (p->flag & child->perm) {
-            QAPI_LIST_ADD(edge->perm, p->num);
+    for (qapi_perm = 0; qapi_perm < BLOCK_PERMISSION__MAX; qapi_perm++) {
+        uint64_t flag = bdrv_qapi_perm_to_blk_perm(qapi_perm);
+
+        if (flag & child->perm) {
+            QAPI_LIST_ADD(edge->perm, qapi_perm);
         }
-        if (p->flag & child->shared_perm) {
-            QAPI_LIST_ADD(edge->shared_perm, p->num);
+        if (flag & child->shared_perm) {
+            QAPI_LIST_ADD(edge->shared_perm, qapi_perm);
         }
     }
 
@@ -5078,6 +5071,27 @@ int bdrv_has_zero_init(BlockDriverState *bs)
     return 0;
 }
 
+int bdrv_has_zero_init_truncate(BlockDriverState *bs)
+{
+    if (!bs->drv) {
+        return 0;
+    }
+
+    if (bs->backing) {
+        /* Depends on the backing image length, but better safe than sorry */
+        return 0;
+    }
+    if (bs->drv->bdrv_has_zero_init_truncate) {
+        return bs->drv->bdrv_has_zero_init_truncate(bs);
+    }
+    if (bs->file && bs->drv->is_filter) {
+        return bdrv_has_zero_init_truncate(bs->file->bs);
+    }
+
+    /* safe default */
+    return 0;
+}
+
 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs)
 {
     BlockDriverInfo bdi;
@@ -5135,6 +5149,15 @@ ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs,
     return NULL;
 }
 
+BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs)
+{
+    BlockDriver *drv = bs->drv;
+    if (!drv || !drv->bdrv_get_specific_stats) {
+        return NULL;
+    }
+    return drv->bdrv_get_specific_stats(bs);
+}
+
 void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event)
 {
     if (!bs || !bs->drv || !bs->drv->bdrv_debug_event) {
@@ -5144,14 +5167,35 @@ void bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event)
     bs->drv->bdrv_debug_event(bs, event);
 }
 
-int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
-                          const char *tag)
+static BlockDriverState *bdrv_find_debug_node(BlockDriverState *bs)
 {
     while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) {
-        bs = bs->file ? bs->file->bs : NULL;
+        if (bs->file) {
+            bs = bs->file->bs;
+            continue;
+        }
+
+        if (bs->drv->is_filter && bs->backing) {
+            bs = bs->backing->bs;
+            continue;
+        }
+
+        break;
     }
 
     if (bs && bs->drv && bs->drv->bdrv_debug_breakpoint) {
+        assert(bs->drv->bdrv_debug_remove_breakpoint);
+        return bs;
+    }
+
+    return NULL;
+}
+
+int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
+                          const char *tag)
+{
+    bs = bdrv_find_debug_node(bs);
+    if (bs) {
         return bs->drv->bdrv_debug_breakpoint(bs, event, tag);
     }
 
@@ -5160,11 +5204,8 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
 
 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
 {
-    while (bs && bs->drv && !bs->drv->bdrv_debug_remove_breakpoint) {
-        bs = bs->file ? bs->file->bs : NULL;
-    }
-
-    if (bs && bs->drv && bs->drv->bdrv_debug_remove_breakpoint) {
+    bs = bdrv_find_debug_node(bs);
+    if (bs) {
         return bs->drv->bdrv_debug_remove_breakpoint(bs, tag);
     }
 
@@ -5299,10 +5340,6 @@ static void coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs,
         return;
     }
 
-    if (!(bs->open_flags & BDRV_O_INACTIVE)) {
-        return;
-    }
-
     QLIST_FOREACH(child, &bs->children, next) {
         bdrv_co_invalidate_cache(child->bs, &local_err);
         if (local_err) {
@@ -5324,36 +5361,36 @@ static void coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs,
      * just keep the extended permissions for the next time that an activation
      * of the image is tried.
      */
-    bs->open_flags &= ~BDRV_O_INACTIVE;
-    bdrv_get_cumulative_perm(bs, &perm, &shared_perm);
-    ret = bdrv_check_perm(bs, NULL, perm, shared_perm, NULL, NULL, &local_err);
-    if (ret < 0) {
-        bs->open_flags |= BDRV_O_INACTIVE;
-        error_propagate(errp, local_err);
-        return;
-    }
-    bdrv_set_perm(bs, perm, shared_perm);
-
-    if (bs->drv->bdrv_co_invalidate_cache) {
-        bs->drv->bdrv_co_invalidate_cache(bs, &local_err);
-        if (local_err) {
+    if (bs->open_flags & BDRV_O_INACTIVE) {
+        bs->open_flags &= ~BDRV_O_INACTIVE;
+        bdrv_get_cumulative_perm(bs, &perm, &shared_perm);
+        ret = bdrv_check_perm(bs, NULL, perm, shared_perm, NULL, NULL, &local_err);
+        if (ret < 0) {
             bs->open_flags |= BDRV_O_INACTIVE;
             error_propagate(errp, local_err);
             return;
         }
-    }
+        bdrv_set_perm(bs, perm, shared_perm);
 
-    for (bm = bdrv_dirty_bitmap_next(bs, NULL); bm;
-         bm = bdrv_dirty_bitmap_next(bs, bm))
-    {
-        bdrv_dirty_bitmap_set_migration(bm, false);
-    }
+        if (bs->drv->bdrv_co_invalidate_cache) {
+            bs->drv->bdrv_co_invalidate_cache(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;
+        FOR_EACH_DIRTY_BITMAP(bs, bm) {
+            bdrv_dirty_bitmap_skip_store(bm, false);
+        }
+
+        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;
+        }
     }
 
     QLIST_FOREACH(parent, &bs->parents, next_parent) {
@@ -5717,12 +5754,11 @@ void bdrv_img_create(const char *filename, const char *fmt,
         return;
     }
 
+    /* Create parameter list */
     create_opts = qemu_opts_append(create_opts, drv->create_opts);
     create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
 
-    /* Create parameter list with default values */
     opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
-    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort);
 
     /* Parse -o options */
     if (options) {
@@ -5732,6 +5768,13 @@ void bdrv_img_create(const char *filename, const char *fmt,
         }
     }
 
+    if (!qemu_opt_get(opts, BLOCK_OPT_SIZE)) {
+        qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size, &error_abort);
+    } else if (img_size != UINT64_C(-1)) {
+        error_setg(errp, "The image size must be specified only once");
+        goto out;
+    }
+
     if (base_filename) {
         qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &local_err);
         if (local_err) {
@@ -6535,25 +6578,3 @@ void bdrv_del_child(BlockDriverState *parent_bs, BdrvChild *child, Error **errp)
 
     parent_bs->drv->bdrv_del_child(parent_bs, child, errp);
 }
-
-bool bdrv_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name,
-                                     uint32_t granularity, Error **errp)
-{
-    BlockDriver *drv = bs->drv;
-
-    if (!drv) {
-        error_setg_errno(errp, ENOMEDIUM,
-                         "Can't store persistent bitmaps to %s",
-                         bdrv_get_device_or_node_name(bs));
-        return false;
-    }
-
-    if (!drv->bdrv_can_store_new_dirty_bitmap) {
-        error_setg_errno(errp, ENOTSUP,
-                         "Can't store persistent bitmaps to %s",
-                         bdrv_get_device_or_node_name(bs));
-        return false;
-    }
-
-    return drv->bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp);
-}