diff mbox series

[12/14] block/qcow2: read_cache_sizes: return status value

Message ID 20200909185930.26524-13-vsementsov@virtuozzo.com
State Accepted
Commit 772c4cad13b97b8e8ef8592228707f7a5557f939
Headers show
Series block: deal with errp: part I | expand

Commit Message

Vladimir Sementsov-Ogievskiy Sept. 9, 2020, 6:59 p.m. UTC 
It's better to return status together with setting errp. It allows to
reduce error propagation.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 block/qcow2.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

Comments

Alberto Garcia Sept. 17, 2020, 2:51 p.m. UTC | #1 
On Wed 09 Sep 2020 08:59:28 PM CEST, Vladimir Sementsov-Ogievskiy wrote:
> It's better to return status together with setting errp. It allows to

> reduce error propagation.

>

> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>


Reviewed-by: Alberto Garcia <berto@igalia.com>


Berto
diff mbox series

Patch

diff --git a/block/qcow2.c b/block/qcow2.c
index c2cd9434cc..31dd28d19e 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -869,7 +869,7 @@  static void qcow2_attach_aio_context(BlockDriverState *bs,
     cache_clean_timer_init(bs, new_context);
 }
 
-static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
+static bool read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
                              uint64_t *l2_cache_size,
                              uint64_t *l2_cache_entry_size,
                              uint64_t *refcount_cache_size, Error **errp)
@@ -907,16 +907,16 @@  static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
             error_setg(errp, QCOW2_OPT_CACHE_SIZE ", " QCOW2_OPT_L2_CACHE_SIZE
                        " and " QCOW2_OPT_REFCOUNT_CACHE_SIZE " may not be set "
                        "at the same time");
-            return;
+            return false;
         } else if (l2_cache_size_set &&
                    (l2_cache_max_setting > combined_cache_size)) {
             error_setg(errp, QCOW2_OPT_L2_CACHE_SIZE " may not exceed "
                        QCOW2_OPT_CACHE_SIZE);
-            return;
+            return false;
         } else if (*refcount_cache_size > combined_cache_size) {
             error_setg(errp, QCOW2_OPT_REFCOUNT_CACHE_SIZE " may not exceed "
                        QCOW2_OPT_CACHE_SIZE);
-            return;
+            return false;
         }
 
         if (l2_cache_size_set) {
@@ -955,8 +955,10 @@  static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
         error_setg(errp, "L2 cache entry size must be a power of two "
                    "between %d and the cluster size (%d)",
                    1 << MIN_CLUSTER_BITS, s->cluster_size);
-        return;
+        return false;
     }
+
+    return true;
 }
 
 typedef struct Qcow2ReopenState {
@@ -983,7 +985,6 @@  static int qcow2_update_options_prepare(BlockDriverState *bs,
     int i;
     const char *encryptfmt;
     QDict *encryptopts = NULL;
-    Error *local_err = NULL;
     int ret;
 
     qdict_extract_subqdict(options, &encryptopts, "encrypt.");
@@ -996,10 +997,8 @@  static int qcow2_update_options_prepare(BlockDriverState *bs,
     }
 
     /* get L2 table/refcount block cache size from command line options */
-    read_cache_sizes(bs, opts, &l2_cache_size, &l2_cache_entry_size,
-                     &refcount_cache_size, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    if (!read_cache_sizes(bs, opts, &l2_cache_size, &l2_cache_entry_size,
+                          &refcount_cache_size, errp)) {
         ret = -EINVAL;
         goto fail;
     }