Merge remote-tracking branch 'stefanha/block' into staging

* stefanha/block:
  ide: Fix status register after short PRDs
  ide: Fix crash with too long PRD
  use int64_t for return values from rbd instead of int
  vdi: don't override libuuid symbols
  block: add bdrv_reopen() support for raw hdev, floppy, and cdrom

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

block/raw-posix.c

@@ -333,6 +333,10 @@ static int raw_reopen_prepare(BDRVReopenState *state,
     }
 #endif
 
+    if (s->type == FTYPE_FD || s->type == FTYPE_CD) {
+        raw_s->open_flags |= O_NONBLOCK;
+    }
+
     raw_parse_flags(state->flags, &raw_s->open_flags);
 
     raw_s->fd = -1;
@@ -1409,6 +1413,9 @@ static BlockDriver bdrv_host_device = {
     .bdrv_probe_device  = hdev_probe_device,
     .bdrv_file_open     = hdev_open,
     .bdrv_close         = raw_close,
+    .bdrv_reopen_prepare = raw_reopen_prepare,
+    .bdrv_reopen_commit  = raw_reopen_commit,
+    .bdrv_reopen_abort   = raw_reopen_abort,
     .bdrv_create        = hdev_create,
     .create_options     = raw_create_options,
     .bdrv_has_zero_init = hdev_has_zero_init,
@@ -1530,6 +1537,9 @@ static BlockDriver bdrv_host_floppy = {
     .bdrv_probe_device	= floppy_probe_device,
     .bdrv_file_open     = floppy_open,
     .bdrv_close         = raw_close,
+    .bdrv_reopen_prepare = raw_reopen_prepare,
+    .bdrv_reopen_commit  = raw_reopen_commit,
+    .bdrv_reopen_abort   = raw_reopen_abort,
     .bdrv_create        = hdev_create,
     .create_options     = raw_create_options,
     .bdrv_has_zero_init = hdev_has_zero_init,
@@ -1629,6 +1639,9 @@ static BlockDriver bdrv_host_cdrom = {
     .bdrv_probe_device	= cdrom_probe_device,
     .bdrv_file_open     = cdrom_open,
     .bdrv_close         = raw_close,
+    .bdrv_reopen_prepare = raw_reopen_prepare,
+    .bdrv_reopen_commit  = raw_reopen_commit,
+    .bdrv_reopen_abort   = raw_reopen_abort,
     .bdrv_create        = hdev_create,
     .create_options     = raw_create_options,
     .bdrv_has_zero_init = hdev_has_zero_init,
@@ -1748,6 +1761,9 @@ static BlockDriver bdrv_host_cdrom = {
     .bdrv_probe_device	= cdrom_probe_device,
     .bdrv_file_open     = cdrom_open,
     .bdrv_close         = raw_close,
+    .bdrv_reopen_prepare = raw_reopen_prepare,
+    .bdrv_reopen_commit  = raw_reopen_commit,
+    .bdrv_reopen_abort   = raw_reopen_abort,
     .bdrv_create        = hdev_create,
     .create_options     = raw_create_options,
     .bdrv_has_zero_init = hdev_has_zero_init,

block/rbd.c

@@ -69,7 +69,7 @@ typedef enum {
 typedef struct RBDAIOCB {
     BlockDriverAIOCB common;
     QEMUBH *bh;
-    int ret;
+    int64_t ret;
     QEMUIOVector *qiov;
     char *bounce;
     RBDAIOCmd cmd;
@@ -86,7 +86,7 @@ typedef struct RADOSCB {
     int done;
     int64_t size;
     char *buf;
-    int ret;
+    int64_t ret;
 } RADOSCB;
 
 #define RBD_FD_READ 0

block/vdi.c

@@ -60,9 +60,6 @@
 /* TODO: move uuid emulation to some central place in QEMU. */
 #include "sysemu.h"     /* UUID_FMT */
 typedef unsigned char uuid_t[16];
-void uuid_generate(uuid_t out);
-int uuid_is_null(const uuid_t uu);
-void uuid_unparse(const uuid_t uu, char *out);
 #endif
 
 /* Code configuration options. */
@@ -124,18 +121,18 @@ void uuid_unparse(const uuid_t uu, char *out);
 #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED)
 
 #if !defined(CONFIG_UUID)
-void uuid_generate(uuid_t out)
+static inline void uuid_generate(uuid_t out)
 {
     memset(out, 0, sizeof(uuid_t));
 }
 
-int uuid_is_null(const uuid_t uu)
+static inline int uuid_is_null(const uuid_t uu)
 {
     uuid_t null_uuid = { 0 };
     return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0;
 }
 
-void uuid_unparse(const uuid_t uu, char *out)
+static inline void uuid_unparse(const uuid_t uu, char *out)
 {
     snprintf(out, 37, UUID_FMT,
             uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7],

hw/ide/core.c

@@ -579,6 +579,7 @@ void ide_dma_cb(void *opaque, int ret)
     IDEState *s = opaque;
     int n;
     int64_t sector_num;
+    bool stay_active = false;
 
     if (ret < 0) {
         int op = BM_STATUS_DMA_RETRY;
@@ -594,6 +595,14 @@ void ide_dma_cb(void *opaque, int ret)
     }
 
     n = s->io_buffer_size >> 9;
+    if (n > s->nsector) {
+        /* The PRDs were longer than needed for this request. Shorten them so
+         * we don't get a negative remainder. The Active bit must remain set
+         * after the request completes. */
+        n = s->nsector;
+        stay_active = true;
+    }
+
     sector_num = ide_get_sector(s);
     if (n > 0) {
         dma_buf_commit(s);
@@ -616,6 +625,7 @@ void ide_dma_cb(void *opaque, int ret)
     if (s->bus->dma->ops->prepare_buf(s->bus->dma, ide_cmd_is_read(s)) == 0) {
         /* The PRDs were too short. Reset the Active bit, but don't raise an
          * interrupt. */
+        s->status = READY_STAT | SEEK_STAT;
         goto eot;
     }
 
@@ -646,6 +656,9 @@ eot:
         bdrv_acct_done(s->bs, &s->acct);
     }
     ide_set_inactive(s);
+    if (stay_active) {
+        s->bus->dma->ops->add_status(s->bus->dma, BM_STATUS_DMAING);
+    }
 }
 
 static void ide_sector_start_dma(IDEState *s, enum ide_dma_cmd dma_cmd)