diff options
Diffstat (limited to 'fs/bcachefs/sb-members.h')
| -rw-r--r-- | fs/bcachefs/sb-members.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/bcachefs/sb-members.h b/fs/bcachefs/sb-members.h index 7cecac44ab80..f2a7794b0b50 100644 --- a/fs/bcachefs/sb-members.h +++ b/fs/bcachefs/sb-members.h @@ -285,6 +285,24 @@ static inline struct bch_dev *bch2_dev_iterate(struct bch_fs *c, struct bch_dev return bch2_dev_tryget(c, dev_idx); } +static inline struct bch_dev *bch2_dev_get_ioref2(struct bch_fs *c, unsigned dev, int rw) +{ + rcu_read_lock(); + struct bch_dev *ca = bch2_dev_rcu(c, dev); + if (ca && !percpu_ref_tryget(&ca->io_ref)) + ca = NULL; + rcu_read_unlock(); + + if (ca && + (ca->mi.state == BCH_MEMBER_STATE_rw || + (ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ))) + return ca; + + if (ca) + percpu_ref_put(&ca->io_ref); + return NULL; +} + /* XXX kill, move to struct bch_fs */ static inline struct bch_devs_mask bch2_online_devs(struct bch_fs *c) { |