On Mon, Jun 15, 2015 at 2:41 PM, je...@suse.com wrote:
From: Jeff Mahoney je...@suse.com
Initially this will just be the length argument passed to it,
but the following patches will adjust that to reflect re-alignment
and skipped blocks.
Signed-off-by: Jeff Mahoney je...@suse.com
Reviewed-by: Filipe Manana fdman...@suse.com
Tested-by: Filipe Manana fdman...@suse.com
---
fs/btrfs/extent-tree.c | 19 ++-
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 0ec3acd..da1145d 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1884,10 +1884,17 @@ static int remove_extent_backref(struct
btrfs_trans_handle *trans,
return ret;
}
-static int btrfs_issue_discard(struct block_device *bdev,
- u64 start, u64 len)
+static int btrfs_issue_discard(struct block_device *bdev, u64 start, u64 len,
+ u64 *discarded_bytes)
{
- return blkdev_issue_discard(bdev, start 9, len 9, GFP_NOFS, 0);
+ int ret = 0;
+
+ *discarded_bytes = 0;
+ ret = blkdev_issue_discard(bdev, start 9, len 9, GFP_NOFS, 0);
+ if (!ret)
+ *discarded_bytes = len;
+
+ return ret;
}
int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
@@ -1908,14 +1915,16 @@ int btrfs_discard_extent(struct btrfs_root *root, u64
bytenr,
for (i = 0; i bbio-num_stripes; i++, stripe++) {
+ u64 bytes;
if (!stripe-dev-can_discard)
continue;
ret = btrfs_issue_discard(stripe-dev-bdev,
stripe-physical,
- stripe-length);
+ stripe-length,
+ bytes);
if (!ret)
- discarded_bytes += stripe-length;
+ discarded_bytes += bytes;
else if (ret != -EOPNOTSUPP)
break; /* Logic errors or -ENOMEM, or -EIO
but I don't know how that could happen JDM */
--
2.4.3
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--
Filipe David Manana,
Reasonable men adapt themselves to the world.
Unreasonable men adapt the world to themselves.
That's why all progress depends on unreasonable men.
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