qcow2: Inform block layer about discard boundaries

[mirror_qemu.git] / blockjob.c

diff --git a/blockjob.c b/blockjob.c
index ca2291b5c56ababe1149edfef3572e249404c220..a5ba3bee523eb5053b06a65d599ca35f0939ae7a 100644 (file)
--- a/blockjob.c
+++ b/blockjob.c
@@ -33,6 +33,7 @@
 #include "qapi/qmp/qerror.h"
 #include "qapi/qmp/qjson.h"
 #include "qemu/coroutine.h"
+#include "qemu/id.h"
 #include "qmp-commands.h"
 #include "qemu/timer.h"
 #include "qapi-event.h"
@@ -116,9 +117,9 @@ static void block_job_detach_aio_context(void *opaque)
     block_job_unref(job);
 }
 
-void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
-                       int64_t speed, BlockCompletionFunc *cb,
-                       void *opaque, Error **errp)
+void *block_job_create(const char *job_id, const BlockJobDriver *driver,
+                       BlockDriverState *bs, int64_t speed,
+                       BlockCompletionFunc *cb, void *opaque, Error **errp)
 {
     BlockBackend *blk;
     BlockJob *job;
@@ -129,6 +130,20 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
         return NULL;
     }
 
+    if (job_id == NULL) {
+        job_id = bdrv_get_device_name(bs);
+    }
+
+    if (!id_wellformed(job_id)) {
+        error_setg(errp, "Invalid job ID '%s'", job_id);
+        return NULL;
+    }
+
+    if (block_job_get(job_id)) {
+        error_setg(errp, "Job ID '%s' already in use", job_id);
+        return NULL;
+    }
+
     blk = blk_new();
     blk_insert_bs(blk, bs);
 
@@ -139,7 +154,7 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
     bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);
 
     job->driver        = driver;
-    job->id            = g_strdup(bdrv_get_device_name(bs));
+    job->id            = g_strdup(job_id);
     job->blk           = blk;
     job->cb            = cb;
     job->opaque        = opaque;
@@ -360,7 +375,7 @@ void block_job_resume(BlockJob *job)
 void block_job_enter(BlockJob *job)
 {
     if (job->co && !job->busy) {
-        qemu_coroutine_enter(job->co, NULL);
+        qemu_coroutine_enter(job->co);
     }
 }
 
@@ -538,6 +553,7 @@ BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err,
 
     switch (on_err) {
     case BLOCKDEV_ON_ERROR_ENOSPC:
+    case BLOCKDEV_ON_ERROR_AUTO:
         action = (error == ENOSPC) ?
                  BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT;
         break;