Select chunks which have at least one byte located inside a given
[vstart, vend) virtual address space range.
Signed-off-by: Ilya Dryomov <idryo...@gmail.com>
---
fs/btrfs/volumes.c | 20 ++++++++++++++++++++
fs/btrfs/volumes.h | 3 ++-
2 files changed, 22 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 4393f6d..eccd458 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2276,6 +2276,20 @@ static int chunk_drange_filter(struct extent_buffer
*leaf,
return 1;
}
+/* [vstart, vend) */
+static int chunk_vrange_filter(struct extent_buffer *leaf,
+ struct btrfs_chunk *chunk,
+ u64 chunk_offset,
+ struct btrfs_restripe_args *rargs)
+{
+ if (chunk_offset < rargs->vend &&
+ chunk_offset + btrfs_chunk_length(leaf, chunk) > rargs->vstart)
+ /* at least part of the chunk is inside this vrange */
+ return 0;
+
+ return 1;
+}
+
static int chunk_soft_convert_filter(u64 chunk_profile,
struct btrfs_restripe_args *rargs)
{
@@ -2337,6 +2351,12 @@ static int should_restripe_chunk(struct btrfs_root *root,
return 0;
}
+ /* vrange filter */
+ if ((rargs->flags & BTRFS_RESTRIPE_ARGS_VRANGE) &&
+ chunk_vrange_filter(leaf, chunk, chunk_offset, rargs)) {
+ return 0;
+ }
+
/* soft profile changing mode */
if ((rargs->flags & BTRFS_RESTRIPE_ARGS_SOFT) &&
chunk_soft_convert_filter(chunk_type, rargs)) {
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 8d4bbcb..9726180 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -188,7 +188,8 @@ struct map_lookup {
#define BTRFS_RESTRIPE_ARGS_PROFILES (1ULL << 0)
#define BTRFS_RESTRIPE_ARGS_USAGE (1ULL << 1)
#define BTRFS_RESTRIPE_ARGS_DEVID (1ULL << 2)
-#define BTRFS_RESTRIPE_ARGS_DRANGE (1ULL << 3)
+#define BTRFS_RESTRIPE_ARGS_DRANGE (1ULL << 3)
+#define BTRFS_RESTRIPE_ARGS_VRANGE (1ULL << 4)
/*
* Profile changing flags. When SOFT is set we won't relocate chunk if
--
1.7.5.4
--
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