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ide: Handle flush failure

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Instead of always assuming success for bdrv_aio_flush, actually do something
with the error. This respects the werror option and accordingly ignores the
error, reports it to the guest or stops the VM and retries after cont.

Ignoring the error is trivial, obviously. For stopping the VM and retrying
later old code can be reused, but we need to introduce a new status for "retry
a flush". For reporting to the guest, fortunately the same action is required
as for a failed read/write (status = DRDY | ERR, error = ABRT), so this code
can be reused as well.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2010-10-18 17:13:05 +02:00
parent 6bcb1a79a3
commit e2bcadadc3
2 changed files with 11 additions and 2 deletions
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10
hw/ide/core.c
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@ -65,6 +65,7 @@ static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb);
static void ide_dma_restart(IDEState *s, int is_read);
static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret);
static int ide_handle_rw_error(IDEState *s, int error, int op);
static void ide_flush_cache(IDEState *s);
static void padstr(char *str, const char *src, int len)
{
@ -688,6 +689,8 @@ static void ide_dma_restart_bh(void *opaque)
} else {
ide_sector_write(bmdma_active_if(bm));
}
} else if (bm->status & BM_STATUS_RETRY_FLUSH) {
ide_flush_cache(bmdma_active_if(bm));
}
}
@ -795,7 +798,12 @@ static void ide_flush_cb(void *opaque, int ret)
{
IDEState *s = opaque;
/* XXX: how do we signal I/O errors here? */
if (ret < 0) {
/* XXX: What sector number to set here? */
if (ide_handle_rw_error(s, -ret, BM_STATUS_RETRY_FLUSH)) {
return;
}
}
s->status = READY_STAT | SEEK_STAT;
ide_set_irq(s->bus);

3
hw/ide/internal.h
View File

@ -472,7 +472,8 @@ struct IDEDeviceInfo {
#define BM_STATUS_INT 0x04
#define BM_STATUS_DMA_RETRY 0x08
#define BM_STATUS_PIO_RETRY 0x10
#define BM_STATUS_RETRY_READ 0x20
#define BM_STATUS_RETRY_READ 0x20
#define BM_STATUS_RETRY_FLUSH 0x40
#define BM_CMD_START 0x01
#define BM_CMD_READ 0x08