block: Mark bdrv_filter_bs() and callers GRAPH_RDLOCK

[mirror_qemu.git] / block / cloop.c

diff --git a/block/cloop.c b/block/cloop.c
index 11f17c8489446f227a00156718f7d624bc06877b..773d7918bec0eafbcc5b930805ae17630c028c46 100644 (file)
--- a/block/cloop.c
+++ b/block/cloop.c
@@ -23,7 +23,8 @@
  */
 #include "qemu/osdep.h"
 #include "qapi/error.h"
-#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "block/block-io.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
 #include "qemu/bswap.h"
@@ -66,16 +67,20 @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags,
     uint32_t offsets_size, max_compressed_block_size = 1, i;
     int ret;
 
-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
+    bdrv_graph_rdlock_main_loop();
+    ret = bdrv_apply_auto_read_only(bs, NULL, errp);
+    bdrv_graph_rdunlock_main_loop();
+    if (ret < 0) {
+        return ret;
     }
 
-    bdrv_set_read_only(bs, true);
+    ret = bdrv_open_file_child(NULL, options, "file", bs, errp);
+    if (ret < 0) {
+        return ret;
+    }
 
     /* read header */
-    ret = bdrv_pread(bs->file, 128, &s->block_size, 4);
+    ret = bdrv_pread(bs->file, 128, 4, &s->block_size, 0);
     if (ret < 0) {
         return ret;
     }
@@ -101,7 +106,7 @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags,
         return -EINVAL;
     }
 
-    ret = bdrv_pread(bs->file, 128 + 4, &s->n_blocks, 4);
+    ret = bdrv_pread(bs->file, 128 + 4, 4, &s->n_blocks, 0);
     if (ret < 0) {
         return ret;
     }
@@ -132,7 +137,7 @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags,
         return -ENOMEM;
     }
 
-    ret = bdrv_pread(bs->file, 128 + 4 + 4, s->offsets, offsets_size);
+    ret = bdrv_pread(bs->file, 128 + 4 + 4, offsets_size, s->offsets, 0);
     if (ret < 0) {
         goto fail;
     }
@@ -209,7 +214,8 @@ static void cloop_refresh_limits(BlockDriverState *bs, Error **errp)
     bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */
 }
 
-static inline int cloop_read_block(BlockDriverState *bs, int block_num)
+static int coroutine_fn GRAPH_RDLOCK
+cloop_read_block(BlockDriverState *bs, int block_num)
 {
     BDRVCloopState *s = bs->opaque;
 
@@ -217,9 +223,9 @@ static inline int cloop_read_block(BlockDriverState *bs, int block_num)
         int ret;
         uint32_t bytes = s->offsets[block_num + 1] - s->offsets[block_num];
 
-        ret = bdrv_pread(bs->file, s->offsets[block_num],
-                         s->compressed_block, bytes);
-        if (ret != bytes) {
+        ret = bdrv_co_pread(bs->file, s->offsets[block_num], bytes,
+                            s->compressed_block, 0);
+        if (ret < 0) {
             return -1;
         }
 
@@ -241,17 +247,17 @@ static inline int cloop_read_block(BlockDriverState *bs, int block_num)
     return 0;
 }
 
-static int coroutine_fn
-cloop_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                QEMUIOVector *qiov, int flags)
+static int coroutine_fn GRAPH_RDLOCK
+cloop_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
+                QEMUIOVector *qiov, BdrvRequestFlags flags)
 {
     BDRVCloopState *s = bs->opaque;
     uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
     int nb_sectors = bytes >> BDRV_SECTOR_BITS;
     int ret, i;
 
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
+    assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE));
+    assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE));
 
     qemu_co_mutex_lock(&s->lock);
 
@@ -290,10 +296,11 @@ static BlockDriver bdrv_cloop = {
     .instance_size  = sizeof(BDRVCloopState),
     .bdrv_probe     = cloop_probe,
     .bdrv_open      = cloop_open,
-    .bdrv_child_perm     = bdrv_format_default_perms,
+    .bdrv_child_perm     = bdrv_default_perms,
     .bdrv_refresh_limits = cloop_refresh_limits,
     .bdrv_co_preadv = cloop_co_preadv,
     .bdrv_close     = cloop_close,
+    .is_format      = true,
 };
 
 static void bdrv_cloop_init(void)