hw/i386/Makefile.obj: use $(PYTHON) to run .py scripts consistently

[qemu.git] / block / qed.h

diff --git a/block/qed.h b/block/qed.h
index 046a4102c01662673f1f1f056646f3350ddf6b66..5d65bea075b65dbd590e707d0597892f9bd5e681 100644 (file)
--- a/block/qed.h
+++ b/block/qed.h
@@ -15,7 +15,7 @@
 #ifndef BLOCK_QED_H
 #define BLOCK_QED_H
 
-#include "block_int.h"
+#include "block/block_int.h"
 
 /* The layout of a QED file is as follows:
  *
@@ -50,11 +50,15 @@ enum {
     /* The image supports a backing file */
     QED_F_BACKING_FILE = 0x01,
 
+    /* The image needs a consistency check before use */
+    QED_F_NEED_CHECK = 0x02,
+
     /* The backing file format must not be probed, treat as raw image */
     QED_F_BACKING_FORMAT_NO_PROBE = 0x04,
 
     /* Feature bits must be used when the on-disk format changes */
     QED_FEATURE_MASK = QED_F_BACKING_FILE | /* supported feature bits */
+                       QED_F_NEED_CHECK |
                        QED_F_BACKING_FORMAT_NO_PROBE,
     QED_COMPAT_FEATURE_MASK = 0,            /* supported compat feature bits */
     QED_AUTOCLEAR_FEATURE_MASK = 0,         /* supported autoclear feature bits */
@@ -74,6 +78,9 @@ enum {
     QED_MIN_TABLE_SIZE = 1,        /* in clusters */
     QED_MAX_TABLE_SIZE = 16,
     QED_DEFAULT_TABLE_SIZE = 4,
+
+    /* Delay to flush and clean image after last allocating write completes */
+    QED_NEED_CHECK_TIMEOUT = 5,    /* in seconds */
 };
 
 typedef struct {
@@ -93,7 +100,7 @@ typedef struct {
     /* if (features & QED_F_BACKING_FILE) */
     uint32_t backing_filename_offset; /* in bytes from start of header */
     uint32_t backing_filename_size;   /* in bytes */
-} QEDHeader;
+} QEMU_PACKED QEDHeader;
 
 typedef struct {
     uint64_t offsets[0];            /* in bytes */
@@ -116,12 +123,17 @@ typedef struct QEDRequest {
     CachedL2Table *l2_table;
 } QEDRequest;
 
+enum {
+    QED_AIOCB_WRITE = 0x0001,       /* read or write? */
+    QED_AIOCB_ZERO  = 0x0002,       /* zero write, used with QED_AIOCB_WRITE */
+};
+
 typedef struct QEDAIOCB {
     BlockDriverAIOCB common;
     QEMUBH *bh;
     int bh_ret;                     /* final return status for completion bh */
     QSIMPLEQ_ENTRY(QEDAIOCB) next;  /* next request */
-    bool is_write;                  /* false - read, true - write */
+    int flags;                      /* QED_AIOCB_* bits ORed together */
     bool *finished;                 /* signal for cancel completion */
     uint64_t end_pos;               /* request end on block device, in bytes */
 
@@ -153,10 +165,15 @@ typedef struct {
 
     /* Allocating write request queue */
     QSIMPLEQ_HEAD(, QEDAIOCB) allocating_write_reqs;
+    bool allocating_write_reqs_plugged;
+
+    /* Periodic flush and clear need check flag */
+    QEMUTimer *need_check_timer;
 } BDRVQEDState;
 
 enum {
     QED_CLUSTER_FOUND,         /* cluster found */
+    QED_CLUSTER_ZERO,          /* zero cluster found */
     QED_CLUSTER_L2,            /* cluster missing in L2 */
     QED_CLUSTER_L1,            /* cluster missing in L1 */
 };
@@ -193,6 +210,11 @@ typedef struct {
 void *gencb_alloc(size_t len, BlockDriverCompletionFunc *cb, void *opaque);
 void gencb_complete(void *opaque, int ret);
 
+/**
+ * Header functions
+ */
+int qed_write_header_sync(BDRVQEDState *s);
+
 /**
  * L2 cache functions
  */
@@ -247,7 +269,7 @@ static inline uint64_t qed_offset_into_cluster(BDRVQEDState *s, uint64_t offset)
     return offset & (s->header.cluster_size - 1);
 }
 
-static inline unsigned int qed_bytes_to_clusters(BDRVQEDState *s, size_t bytes)
+static inline uint64_t qed_bytes_to_clusters(BDRVQEDState *s, uint64_t bytes)
 {
     return qed_start_of_cluster(s, bytes + (s->header.cluster_size - 1)) /
            (s->header.cluster_size - 1);
@@ -294,4 +316,29 @@ static inline bool qed_check_table_offset(BDRVQEDState *s, uint64_t offset)
            qed_check_cluster_offset(s, end_offset);
 }
 
+static inline bool qed_offset_is_cluster_aligned(BDRVQEDState *s,
+                                                 uint64_t offset)
+{
+    if (qed_offset_into_cluster(s, offset)) {
+        return false;
+    }
+    return true;
+}
+
+static inline bool qed_offset_is_unalloc_cluster(uint64_t offset)
+{
+    if (offset == 0) {
+        return true;
+    }
+    return false;
+}
+
+static inline bool qed_offset_is_zero_cluster(uint64_t offset)
+{
+    if (offset == 1) {
+        return true;
+    }
+    return false;
+}
+
 #endif /* BLOCK_QED_H */