when send/receive a sparse file, the holes of the original file
will be filled with zero. The holes will be sent as ZERO streams,
and it's unnecessary.
So, I improved this by skipping the hole of file while sending.
Signed-off-by: Cheng Yang <chenyang.fnst@xxxxxxxxxxxxxx>
---
fs/btrfs/send.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index e78b297..1e1d59a 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -3718,6 +3718,7 @@ static int send_write_or_clone(struct send_ctx *sctx,
u64 pos = 0;
u64 len;
u32 l;
+ u64 bytenr;
u8 type;
ei = btrfs_item_ptr(path->nodes[0], path->slots[0],
@@ -3732,6 +3733,11 @@ static int send_write_or_clone(struct send_ctx *sctx,
*/
len = PAGE_CACHE_ALIGN(len);
} else {
+ bytenr = btrfs_file_extent_disk_bytenr(path->nodes[0], ei);
+ if (bytenr == 0) {
+ ret = 0;
+ goto out;
+ }
len = btrfs_file_extent_num_bytes(path->nodes[0], ei);
}
--
1.7.7.6
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