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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-05-03 18:43:31 +0200 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-05-09 22:23:35 +0200 |
| commit | 0e57996c6964027e36a854247bfd266d207314c7 (patch) | |
| tree | e435289aa771516003d99c76b3028379581069a6 /fs/bcachefs/sb-members.h | |
| parent | bcachefs: for_each_bset() declares loop iter (diff) | |
| download | linux-0e57996c6964027e36a854247bfd266d207314c7.tar.xz linux-0e57996c6964027e36a854247bfd266d207314c7.zip | |
bcachefs: bch2_dev_get_ioref2(); alloc_background.c
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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) { |