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block: tell drivers about an image resize

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Extend the change_cb callback with a reason argument, and use it
to tell drivers about size changes.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-01-24 13:32:41 +01:00 • committed by Kevin Wolf
parent 6d4a2b3a47
commit db97ee6a97
5 changed files with 25 additions and 8 deletions
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12
block.c
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@ -645,7 +645,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
/* call the change callback */
bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
}
return 0;
@ -684,7 +684,7 @@ void bdrv_close(BlockDriverState *bs)
/* call the change callback */
bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
}
}
@ -1135,6 +1135,9 @@ int bdrv_truncate(BlockDriverState *bs, int64_t offset)
ret = drv->bdrv_truncate(bs, offset);
if (ret == 0) {
ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS);
if (bs->change_cb) {
bs->change_cb(bs->change_opaque, CHANGE_SIZE);
}
}
return ret;
}
@ -1366,7 +1369,8 @@ int bdrv_enable_write_cache(BlockDriverState *bs)
/* XXX: no longer used */
void bdrv_set_change_cb(BlockDriverState *bs,
void (*change_cb)(void *opaque), void *opaque)
void (*change_cb)(void *opaque, int reason),
void *opaque)
{
bs->change_cb = change_cb;
bs->change_opaque = opaque;
@ -1411,7 +1415,7 @@ int bdrv_set_key(BlockDriverState *bs, const char *key)
/* call the change callback now, we skipped it on open */
bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
bs->change_cb(bs->change_opaque, CHANGE_MEDIA);
}
return ret;
}