From: Tejun Heo <tj@kernel.org>
To: dsterba@suse.com, clm@fb.com, josef@toxicpanda.com,
axboe@kernel.dk, jack@suse.cz
Cc: linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, kernel-team@fb.com,
Tejun Heo <tj@kernel.org>
Subject: [PATCH 2/8] blkcg, writeback: Implement wbc_blkcg_css()
Date: Thu, 13 Jun 2019 17:33:44 -0700 [thread overview]
Message-ID: <20190614003350.1178444-3-tj@kernel.org> (raw)
In-Reply-To: <20190614003350.1178444-1-tj@kernel.org>
Add a helper to determine the target blkcg from wbc.
Signed-off-by: Tejun Heo <tj@kernel.org>
---
include/linux/writeback.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index b8f5f000cde4..1c85563f035d 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -93,6 +93,16 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
return 0;
}
+static inline struct cgroup_subsys_state *
+wbc_blkcg_css(struct writeback_control *wbc)
+{
+#ifdef CONFIG_CGROUP_WRITEBACK
+ if (wbc->wb)
+ return wbc->wb->blkcg_css;
+#endif
+ return blkcg_root_css;
+}
+
/*
* A wb_domain represents a domain that wb's (bdi_writeback's) belong to
* and are measured against each other in. There always is one global
--
2.17.1
next prev parent reply other threads:[~2019-06-14 0:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 0:33 [PATCHSET btrfs/for-next] btrfs: fix cgroup writeback support Tejun Heo
2019-06-14 0:33 ` [PATCH 1/8] blkcg, writeback: Add wbc->no_wbc_acct Tejun Heo
2019-06-14 13:41 ` Josef Bacik
2019-06-14 0:33 ` Tejun Heo [this message]
2019-06-14 13:41 ` [PATCH 2/8] blkcg, writeback: Implement wbc_blkcg_css() Josef Bacik
2019-06-14 0:33 ` [PATCH 3/8] blkcg: implement REQ_CGROUP_PUNT Tejun Heo
2019-06-14 13:43 ` Josef Bacik
2019-06-14 0:33 ` [PATCH 4/8] Btrfs: stop using btrfs_schedule_bio() Tejun Heo
2019-06-14 13:45 ` Josef Bacik
2019-06-14 0:33 ` [PATCH 5/8] Btrfs: delete the entire async bio submission framework Tejun Heo
2019-06-14 13:48 ` Josef Bacik
2019-06-14 0:33 ` [PATCH 6/8] Btrfs: only associate the locked page with one async_cow struct Tejun Heo
2019-06-14 13:48 ` Josef Bacik
2019-06-14 0:33 ` [PATCH 7/8] Btrfs: use REQ_CGROUP_PUNT for worker thread submitted bios Tejun Heo
2019-06-14 13:50 ` Josef Bacik
2019-06-14 15:15 ` David Sterba
2019-06-14 15:34 ` Tejun Heo
2019-06-14 0:33 ` [PATCH 8/8] Btrfs: extent_write_locked_range() should attach inode->i_wb Tejun Heo
2019-06-14 14:12 ` Josef Bacik
2019-06-14 15:32 ` [PATCH v2 " Tejun Heo
2019-06-14 17:46 ` [PATCHSET btrfs/for-next] btrfs: fix cgroup writeback support Tejun Heo
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