ctx->eb = eb;
- if (!btrfs_check_meta_write_pointer(eb->fs_info, ctx)) {
- /*
- * If for_sync, this hole will be filled with
- * trasnsaction commit.
- */
- if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)
- ret = -EAGAIN;
- else
+ ret = btrfs_check_meta_write_pointer(eb->fs_info, ctx);
+ if (ret) {
+ if (ret == -EBUSY)
ret = 0;
free_extent_buffer(eb);
return ret;
}
}
-bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
- struct btrfs_eb_write_context *ctx)
+/*
+ * Check if @ctx->eb is aligned to the write pointer.
+ *
+ * Return:
+ * 0: @ctx->eb is at the write pointer. You can write it.
+ * -EAGAIN: There is a hole. The caller should handle the case.
+ * -EBUSY: There is a hole, but the caller can just bail out.
+ */
+int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+ struct btrfs_eb_write_context *ctx)
{
+ const struct writeback_control *wbc = ctx->wbc;
const struct extent_buffer *eb = ctx->eb;
struct btrfs_block_group *block_group = ctx->zoned_bg;
if (!btrfs_is_zoned(fs_info))
- return true;
+ return 0;
if (block_group) {
if (block_group->start > eb->start ||
if (!block_group) {
block_group = btrfs_lookup_block_group(fs_info, eb->start);
if (!block_group)
- return true;
+ return 0;
ctx->zoned_bg = block_group;
}
- if (block_group->meta_write_pointer != eb->start)
- return false;
- block_group->meta_write_pointer = eb->start + eb->len;
+ if (block_group->meta_write_pointer == eb->start) {
+ block_group->meta_write_pointer = eb->start + eb->len;
- return true;
+ return 0;
+ }
+
+ /* If for_sync, this hole will be filled with trasnsaction commit. */
+ if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)
+ return -EAGAIN;
+ return -EBUSY;
}
void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
struct extent_buffer *eb);
bool btrfs_use_zone_append(struct btrfs_bio *bbio);
void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
-bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
- struct btrfs_eb_write_context *ctx);
+int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+ struct btrfs_eb_write_context *ctx);
void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
struct extent_buffer *eb);
int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
{
}
-static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
- struct btrfs_eb_write_context *ctx)
+static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+ struct btrfs_eb_write_context *ctx)
{
- return true;
+ return 0;
}
static inline void btrfs_revert_meta_write_pointer(