diff options
| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-12-17 17:37:26 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2007-12-26 19:15:17 +0200 |
| commit | e73f4459d969bb266f03dd4cbe21bdba8cb2732c (patch) | |
| tree | 5af7655da65f2c33f6ea4efdfaa8b0e0670d6aea /drivers/mtd/ubi/ubi.h | |
| parent | 9f961b57568960a150cc9781c52824c9093a0514 (diff) | |
UBI: add UBI devices reference counting
This is one more step on the way to "removable" UBI devices. It
adds reference counting for UBI devices. Every time a volume on
this device is opened - the device's refcount is increased. It
is also increased if someone is reading any sysfs file of this
UBI device or of one of its volumes.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/ubi.h')
| -rw-r--r-- | drivers/mtd/ubi/ubi.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index 21c028366fd..91fde0e8ff5 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -245,6 +245,7 @@ struct ubi_wl_entry; * @beb_rsvd_level, @bad_peb_count, @good_peb_count, @vol_count, * @vol->readers, @vol->writers, @vol->exclusive, * @vol->ref_count, @vol->mapping and @vol->eba_tbl. + * @ref_count: count of references on the UBI device * * @rsvd_pebs: count of reserved physical eraseblocks * @avail_pebs: count of available physical eraseblocks @@ -325,6 +326,7 @@ struct ubi_device { int vol_count; struct ubi_volume *volumes[UBI_MAX_VOLUMES+UBI_INT_VOL_COUNT]; spinlock_t volumes_lock; + int ref_count; int rsvd_pebs; int avail_pebs; @@ -401,7 +403,6 @@ extern struct kmem_cache *ubi_wl_entry_slab; extern struct file_operations ubi_ctrl_cdev_operations; extern struct file_operations ubi_cdev_operations; extern struct file_operations ubi_vol_cdev_operations; -extern struct ubi_device *ubi_devices[]; extern struct class *ubi_class; /* vtbl.c */ @@ -479,6 +480,12 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum, int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum, struct ubi_vid_hdr *vid_hdr); +/* build.c */ +struct ubi_device *ubi_get_device(int ubi_num); +void ubi_put_device(struct ubi_device *ubi); +struct ubi_device *ubi_get_by_major(int major); +int ubi_major2num(int major); + /* * ubi_rb_for_each_entry - walk an RB-tree. * @rb: a pointer to type 'struct rb_node' to to use as a loop counter |