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-rw-r--r--block.c40
-rw-r--r--block.h10
-rw-r--r--block_int.h1
-rw-r--r--monitor.c6
4 files changed, 57 insertions, 0 deletions
diff --git a/block.c b/block.c
index e865fab27e..92ec2c3b4e 100644
--- a/block.c
+++ b/block.c
@@ -221,6 +221,7 @@ BlockDriverState *bdrv_new(const char *device_name)
if (device_name[0] != '\0') {
QTAILQ_INSERT_TAIL(&bdrv_states, bs, list);
}
+ bdrv_iostatus_disable(bs);
return bs;
}
@@ -772,6 +773,7 @@ int bdrv_attach_dev(BlockDriverState *bs, void *dev)
return -EBUSY;
}
bs->dev = dev;
+ bdrv_iostatus_reset(bs);
return 0;
}
@@ -3183,6 +3185,44 @@ int bdrv_in_use(BlockDriverState *bs)
return bs->in_use;
}
+void bdrv_iostatus_enable(BlockDriverState *bs)
+{
+ bs->iostatus = BDRV_IOS_OK;
+}
+
+/* The I/O status is only enabled if the drive explicitly
+ * enables it _and_ the VM is configured to stop on errors */
+bool bdrv_iostatus_is_enabled(const BlockDriverState *bs)
+{
+ return (bs->iostatus != BDRV_IOS_INVAL &&
+ (bs->on_write_error == BLOCK_ERR_STOP_ENOSPC ||
+ bs->on_write_error == BLOCK_ERR_STOP_ANY ||
+ bs->on_read_error == BLOCK_ERR_STOP_ANY));
+}
+
+void bdrv_iostatus_disable(BlockDriverState *bs)
+{
+ bs->iostatus = BDRV_IOS_INVAL;
+}
+
+void bdrv_iostatus_reset(BlockDriverState *bs)
+{
+ if (bdrv_iostatus_is_enabled(bs)) {
+ bs->iostatus = BDRV_IOS_OK;
+ }
+}
+
+/* XXX: Today this is set by device models because it makes the implementation
+ quite simple. However, the block layer knows about the error, so it's
+ possible to implement this without device models being involved */
+void bdrv_iostatus_set_err(BlockDriverState *bs, int error)
+{
+ if (bdrv_iostatus_is_enabled(bs) && bs->iostatus == BDRV_IOS_OK) {
+ assert(error >= 0);
+ bs->iostatus = error == ENOSPC ? BDRV_IOS_ENOSPC : BDRV_IOS_FAILED;
+ }
+}
+
void
bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, int64_t bytes,
enum BlockAcctType type)
diff --git a/block.h b/block.h
index 16bfa0a3d6..e77988e49c 100644
--- a/block.h
+++ b/block.h
@@ -77,6 +77,16 @@ typedef enum {
BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
} BlockMonEventAction;
+typedef enum {
+ BDRV_IOS_INVAL, BDRV_IOS_OK, BDRV_IOS_FAILED, BDRV_IOS_ENOSPC,
+ BDRV_IOS_MAX
+} BlockIOStatus;
+
+void bdrv_iostatus_enable(BlockDriverState *bs);
+void bdrv_iostatus_reset(BlockDriverState *bs);
+void bdrv_iostatus_disable(BlockDriverState *bs);
+bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
+void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
void bdrv_mon_event(const BlockDriverState *bdrv,
BlockMonEventAction action, int is_read);
void bdrv_info_print(Monitor *mon, const QObject *data);
diff --git a/block_int.h b/block_int.h
index 8c3b86373c..f2f4f2db38 100644
--- a/block_int.h
+++ b/block_int.h
@@ -199,6 +199,7 @@ struct BlockDriverState {
drivers. They are not used by the block driver */
int cyls, heads, secs, translation;
BlockErrorAction on_read_error, on_write_error;
+ BlockIOStatus iostatus;
char device_name[32];
unsigned long *dirty_bitmap;
int64_t dirty_count;
diff --git a/monitor.c b/monitor.c
index 31b212aa6b..1a2895633e 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1221,6 +1221,11 @@ struct bdrv_iterate_context {
int err;
};
+static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
+{
+ bdrv_iostatus_reset(bs);
+}
+
/**
* do_cont(): Resume emulation.
*/
@@ -1237,6 +1242,7 @@ static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data)
return -1;
}
+ bdrv_iterate(iostatus_bdrv_it, NULL);
bdrv_iterate(encrypted_bdrv_it, &context);
/* only resume the vm if all keys are set and valid */
if (!context.err) {