From a6e6ca61915cfee0c1f33ba4289cafea04a2637f Mon Sep 17 00:00:00 2001
Message-Id: <a6e6ca61915cfee0c1f33ba4289cafea04a2637f.1379425497.git.minovotn@redhat.com>
In-Reply-To: <f5f5558c6067d2cdb77e46707b0bda1f4f885402.1379425497.git.minovotn@redhat.com>
References: <f5f5558c6067d2cdb77e46707b0bda1f4f885402.1379425497.git.minovotn@redhat.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 6 Sep 2013 18:12:22 +0200
Subject: [PATCH 02/25] block: implement is_allocated for raw
Either FIEMAP, or SEEK_DATA+SEEK_HOLE can be used to implement the
is_allocated callback for raw files. On Linux ext4, btrfs and XFS
all support it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 5500316ded9db5b10072334cde1e27fb37682240)
[RHEL6: only implement support in the format, not in the protocol]
Signed-off-by: Michal Novotny <minovotn@redhat.com>
---
block/raw.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/block/raw.c b/block/raw.c
index 2c7fb97..d58be4b 100644
--- a/block/raw.c
+++ b/block/raw.c
@@ -38,6 +38,13 @@ static int coroutine_fn raw_co_flush(BlockDriverState *bs)
return bdrv_co_flush(bs->file);
}
+static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum)
+{
+ return bdrv_co_is_allocated(bs->file, sector_num, nb_sectors, pnum);
+}
+
static int64_t raw_getlength(BlockDriverState *bs)
{
return bdrv_getlength(bs->file);
@@ -123,6 +130,7 @@ static BlockDriver bdrv_raw = {
.bdrv_co_readv = raw_co_readv,
.bdrv_co_writev = raw_co_writev,
.bdrv_co_flush = raw_co_flush,
+ .bdrv_co_is_allocated = raw_co_is_allocated,
.bdrv_co_discard = raw_co_discard,
.bdrv_probe = raw_probe,
--
1.7.11.7