diff options
Diffstat (limited to 'drivers/md/dm-core.h')
| -rw-r--r-- | drivers/md/dm-core.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index c954ff91870e..6c6bd24774f2 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -22,6 +22,8 @@ #define DM_RESERVED_MAX_IOS 1024 +struct dm_io; + struct dm_kobject_holder { struct kobject kobj; struct completion completion; @@ -91,6 +93,14 @@ struct mapped_device { spinlock_t deferred_lock; struct bio_list deferred; + /* + * requeue work context is needed for cloning one new bio + * to represent the dm_io to be requeued, since each + * dm_io may point to the original bio from FS. + */ + struct work_struct requeue_work; + struct dm_io *requeue_list; + void *interface_ptr; /* @@ -216,6 +226,13 @@ struct dm_table { #endif }; +static inline struct dm_target *dm_table_get_target(struct dm_table *t, + unsigned int index) +{ + BUG_ON(index >= t->num_targets); + return t->targets + index; +} + /* * One of these is allocated per clone bio. */ @@ -230,6 +247,9 @@ struct dm_target_io { sector_t old_sector; struct bio clone; }; +#define DM_TARGET_IO_BIO_OFFSET (offsetof(struct dm_target_io, clone)) +#define DM_IO_BIO_OFFSET \ + (offsetof(struct dm_target_io, clone) + offsetof(struct dm_io, tio)) /* * dm_target_io flags @@ -272,7 +292,6 @@ struct dm_io { atomic_t io_count; struct mapped_device *md; - struct bio *split_bio; /* The three fields represent mapped part of original bio */ struct bio *orig_bio; unsigned int sector_offset; /* offset to end of orig_bio */ @@ -300,6 +319,8 @@ static inline void dm_io_set_flag(struct dm_io *io, unsigned int bit) io->flags |= (1U << bit); } +void dm_io_rewind(struct dm_io *io, struct bio_set *bs); + static inline struct completion *dm_get_completion_from_kobject(struct kobject *kobj) { return &container_of(kobj, struct dm_kobject_holder, kobj)->completion; |