lockable: replaced locks with lock guard macros where appropriate

- ran regexp "qemu_mutex_lock\(.*\).*\n.*if" to find targets
- replaced result with QEMU_LOCK_GUARD if all unlocks at function end
- replaced result with WITH_QEMU_LOCK_GUARD if unlock not at end

Signed-off-by: Daniel Brodsky <dnbrdsky@gmail.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-id: 20200404042108.389635-3-dnbrdsky@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 24 insertions, 27 deletions

diff --git a/block/nfs.c b/block/nfs.c
index 2393fbf..b86ba5b 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -273,15 +273,14 @@ static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,
     nfs_co_init_task(bs, &task);
     task.iov = iov;
 
-    qemu_mutex_lock(&client->mutex);
-    if (nfs_pread_async(client->context, client->fh,
-                        offset, bytes, nfs_co_generic_cb, &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
-        return -ENOMEM;
-    }
+    WITH_QEMU_LOCK_GUARD(&client->mutex) {
+        if (nfs_pread_async(client->context, client->fh,
+                            offset, bytes, nfs_co_generic_cb, &task) != 0) {
+            return -ENOMEM;
+        }
 
-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
+        nfs_set_events(client);
+    }
     while (!task.complete) {
         qemu_coroutine_yield();
     }
@@ -320,19 +319,18 @@ static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset,
         buf = iov->iov[0].iov_base;
     }
 
-    qemu_mutex_lock(&client->mutex);
-    if (nfs_pwrite_async(client->context, client->fh,
-                         offset, bytes, buf,
-                         nfs_co_generic_cb, &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
-        if (my_buffer) {
-            g_free(buf);
+    WITH_QEMU_LOCK_GUARD(&client->mutex) {
+        if (nfs_pwrite_async(client->context, client->fh,
+                             offset, bytes, buf,
+                             nfs_co_generic_cb, &task) != 0) {
+            if (my_buffer) {
+                g_free(buf);
+            }
+            return -ENOMEM;
         }
-        return -ENOMEM;
-    }
 
-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
+        nfs_set_events(client);
+    }
     while (!task.complete) {
         qemu_coroutine_yield();
     }
@@ -355,15 +353,14 @@ static int coroutine_fn nfs_co_flush(BlockDriverState *bs)
 
     nfs_co_init_task(bs, &task);
 
-    qemu_mutex_lock(&client->mutex);
-    if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb,
-                        &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
-        return -ENOMEM;
-    }
+    WITH_QEMU_LOCK_GUARD(&client->mutex) {
+        if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb,
+                            &task) != 0) {
+            return -ENOMEM;
+        }
 
-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
+        nfs_set_events(client);
+    }
     while (!task.complete) {
         qemu_coroutine_yield();
     }