diff options
| author | Tejun Heo <tj@kernel.org> | 2015-05-23 00:13:24 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-06-02 17:33:34 +0300 |
| commit | 1d933cf096e3aea15f1aec8297657b7a846fab63 (patch) | |
| tree | 43ac4eff222da7ef5c873259462d906f9e3f9a7b /include | |
| parent | fd383c2d3cae146337cea809de0d622b8b887e6c (diff) | |
| download | linux-1d933cf096e3aea15f1aec8297657b7a846fab63.tar.xz | |
blkcg: implement bio_associate_blkcg()
Currently, a bio can only be associated with the io_context and blkcg
of %current using bio_associate_current(). This is too restrictive
for cgroup writeback support. Implement bio_associate_blkcg() which
associates a bio with the specified blkcg.
bio_associate_blkcg() leaves the io_context unassociated.
bio_associate_current() is updated so that it considers a bio as
already associated if it has a blkcg_css, instead of an io_context,
associated with it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bio.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index f0291cf64cc5..5e963a6d7c14 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -482,9 +482,12 @@ extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int); extern unsigned int bvec_nr_vecs(unsigned short idx); #ifdef CONFIG_BLK_CGROUP +int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css); int bio_associate_current(struct bio *bio); void bio_disassociate_task(struct bio *bio); #else /* CONFIG_BLK_CGROUP */ +static inline int bio_associate_blkcg(struct bio *bio, + struct cgroup_subsys_state *blkcg_css) { return 0; } static inline int bio_associate_current(struct bio *bio) { return -ENOENT; } static inline void bio_disassociate_task(struct bio *bio) { } #endif /* CONFIG_BLK_CGROUP */ |