kconfig: add documentation

[qemu.git] / block / blkreplay.c

diff --git a/block/blkreplay.c b/block/blkreplay.c
old mode 100755 (executable)
new mode 100644 (file)
index 3368c8c..b5d9efd
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -20,11 +20,6 @@ typedef struct Request {
     QEMUBH *bh;
 } Request;
 
     QEMUBH *bh;
 } Request;
 

-/* Next request id.
-   This counter is global, because requests from different
-   block devices should not get overlapping ids. */
-static uint64_t request_id;
-

 static int blkreplay_open(BlockDriverState *bs, QDict *options, int flags,
                           Error **errp)
 {
 static int blkreplay_open(BlockDriverState *bs, QDict *options, int flags,
                           Error **errp)
 {


@@ -40,18 +35,14 @@ static int blkreplay_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
         goto fail;
     }
 

+    bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED;
+    bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED;
+

     ret = 0;
 fail:
     ret = 0;
 fail:

-    if (ret < 0) {
-        bdrv_unref_child(bs, bs->file);
-    }

     return ret;
 }
 
     return ret;
 }
 

-static void blkreplay_close(BlockDriverState *bs)
-{
-}
-

 static int64_t blkreplay_getlength(BlockDriverState *bs)
 {
     return bdrv_getlength(bs->file->bs);
 static int64_t blkreplay_getlength(BlockDriverState *bs)
 {
     return bdrv_getlength(bs->file->bs);


@@ -65,7 +56,7 @@ static int64_t blkreplay_getlength(BlockDriverState *bs)
 static void blkreplay_bh_cb(void *opaque)
 {
     Request *req = opaque;
 static void blkreplay_bh_cb(void *opaque)
 {
     Request *req = opaque;

-    qemu_coroutine_enter(req->co);
+    aio_co_wake(req->co);

     qemu_bh_delete(req->bh);
     g_free(req);
 }
     qemu_bh_delete(req->bh);
     g_free(req);
 }


@@ -84,7 +75,7 @@ static void block_request_create(uint64_t reqid, BlockDriverState *bs,
 static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
     uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
 {
 static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
     uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
 {

-    uint64_t reqid = request_id++;
+    uint64_t reqid = blkreplay_next_id();

     int ret = bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
     int ret = bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();


@@ -95,7 +86,7 @@ static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
 static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
     uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
 {
 static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
     uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
 {

-    uint64_t reqid = request_id++;
+    uint64_t reqid = blkreplay_next_id();

     int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
     int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();


@@ -104,21 +95,21 @@ static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
 }
 
 static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
 }
 
 static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,

-    int64_t offset, int count, BdrvRequestFlags flags)
+    int64_t offset, int bytes, BdrvRequestFlags flags)

 {
 {

-    uint64_t reqid = request_id++;
-    int ret = bdrv_co_pwrite_zeroes(bs->file, offset, count, flags);
+    uint64_t reqid = blkreplay_next_id();
+    int ret = bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags);

     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
 
     return ret;
 }
 
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
 
     return ret;
 }
 

-static int coroutine_fn blkreplay_co_discard(BlockDriverState *bs,
-    int64_t sector_num, int nb_sectors)
+static int coroutine_fn blkreplay_co_pdiscard(BlockDriverState *bs,
+                                              int64_t offset, int bytes)

 {
 {

-    uint64_t reqid = request_id++;
-    int ret = bdrv_co_discard(bs->file->bs, sector_num, nb_sectors);
+    uint64_t reqid = blkreplay_next_id();
+    int ret = bdrv_co_pdiscard(bs->file, offset, bytes);

     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
 
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
 


@@ -127,7 +118,7 @@ static int coroutine_fn blkreplay_co_discard(BlockDriverState *bs,
 
 static int coroutine_fn blkreplay_co_flush(BlockDriverState *bs)
 {
 
 static int coroutine_fn blkreplay_co_flush(BlockDriverState *bs)
 {

-    uint64_t reqid = request_id++;
+    uint64_t reqid = blkreplay_next_id();

     int ret = bdrv_co_flush(bs->file->bs);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();
     int ret = bdrv_co_flush(bs->file->bs);
     block_request_create(reqid, bs, qemu_coroutine_self());
     qemu_coroutine_yield();


@@ -137,18 +128,17 @@ static int coroutine_fn blkreplay_co_flush(BlockDriverState *bs)
 
 static BlockDriver bdrv_blkreplay = {
     .format_name            = "blkreplay",
 
 static BlockDriver bdrv_blkreplay = {
     .format_name            = "blkreplay",

-    .protocol_name          = "blkreplay",

     .instance_size          = 0,
 
     .instance_size          = 0,
 

-    .bdrv_file_open         = blkreplay_open,
-    .bdrv_close             = blkreplay_close,
+    .bdrv_open              = blkreplay_open,
+    .bdrv_child_perm        = bdrv_filter_default_perms,

     .bdrv_getlength         = blkreplay_getlength,
 
     .bdrv_co_preadv         = blkreplay_co_preadv,
     .bdrv_co_pwritev        = blkreplay_co_pwritev,
 
     .bdrv_co_pwrite_zeroes  = blkreplay_co_pwrite_zeroes,
     .bdrv_getlength         = blkreplay_getlength,
 
     .bdrv_co_preadv         = blkreplay_co_preadv,
     .bdrv_co_pwritev        = blkreplay_co_pwritev,
 
     .bdrv_co_pwrite_zeroes  = blkreplay_co_pwrite_zeroes,

-    .bdrv_co_discard        = blkreplay_co_discard,
+    .bdrv_co_pdiscard       = blkreplay_co_pdiscard,

     .bdrv_co_flush          = blkreplay_co_flush,
 };
 
     .bdrv_co_flush          = blkreplay_co_flush,
 };