linux.git/drivers/mtd/ubi/kapi.c, branch v2.6.32

UBI: add notification API

2009-06-02T10:53:35+00:00

UBI volume notifications are intended to create the API to get clients
notified about volume creation/deletion, renaming and re-sizing. A
client can subscribe to these notifications using 'ubi_volume_register()'
and cancel the subscription using 'ubi_volume_unregister()'. When UBI
volumes change, a blocking notifier is called. Clients also can request
"added" events on all volumes that existed before client subscribed
to the notifications.

If we use notifications instead of calling functions like 'ubi_gluebi_xxx()',
we can make the MTD emulation layer to be more flexible: build it as a
separate module and load/unload it on demand.

[Artem: many cleanups, rework locking, add "updated" event, provide
 device/volume info in notifiers]

Signed-off-by: Dmitry Pervushin 
Signed-off-by: Artem Bityutskiy

UBI: improve debugging messages

2009-05-18T09:28:25+00:00

Various minor improvements to the debugging messages which
I found useful while hunting problems.

Signed-off-by: Artem Bityutskiy

fix similar typos to successfull

2009-01-08T16:31:15+00:00

When I review ocfs2 code, find there are 2 typos to "successfull".  After
doing grep "successfull " in kernel tree, 22 typos found totally -- great
minds always think alike :)

This patch fixes all the similar typos. Thanks for Randy's ack and comments.

Signed-off-by: Coly Li 
Acked-by: Randy Dunlap 
Acked-by: Roland Dreier 
Cc: Jeremy Kerr 
Cc: Jeff Garzik 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Cc: Theodore Ts'o 
Cc: Mark Fasheh 
Cc: Vlad Yasevich 
Cc: Sridhar Samudrala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

UBI: fix and re-work debugging stuff

2008-07-24T10:34:45+00:00

Signed-off-by: Artem Bityutskiy

UBI: add ubi_sync() interface

2008-07-24T10:32:56+00:00

To flush MTD device caches.

Signed-off-by: Artem Bityutskiy

UBI: avoid unnecessary division operations

2008-07-24T10:32:54+00:00

UBI already checks that @min io size is the power of 2 at io_init.
It is save to use bit operations then.

Signed-off-by: Kyungmin Park 
Signed-off-by: Artem Bityutskiy

UBI: fix warnings

2008-01-25T14:41:24+00:00

drivers/mtd/ubi/cdev.c: In function ‘vol_cdev_read’:
drivers/mtd/ubi/cdev.c:187: warning: unused variable ‘vol_id’
CC [M]  drivers/mtd/ubi/kapi.o
drivers/mtd/ubi/kapi.c: In function ‘ubi_leb_erase’:
drivers/mtd/ubi/kapi.c:483: warning: unused variable ‘vol_id’
drivers/mtd/ubi/kapi.c: In function ‘ubi_leb_unmap’:
drivers/mtd/ubi/kapi.c:544: warning: unused variable ‘vol_id’
drivers/mtd/ubi/kapi.c: In function ‘ubi_leb_map’:
drivers/mtd/ubi/kapi.c:582: warning: unused variable ‘vol_id’

Signed-off-by: Artem Bityutskiy

UBI: use separate mutex for volumes checking

2007-12-26T17:15:17+00:00

Introduce a separate mutex which serializes volumes checking,
because we cammot really use volumes_mutex - it cases reverse
locking problems with mtd_tbl_mutex when gluebi is used -
thanks to lockdep.

Signed-off-by: Artem Bityutskiy

UBI: add UBI devices reference counting

2007-12-26T17:15:17+00:00

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

UBI: introduce volume refcounting

2007-12-26T17:15:16+00:00

Add ref_count field to UBI volumes and remove weired "vol->removed"
field. This way things are better understandable and we do not have
to do whold show_attr operation under spinlock.

Signed-off-by: Artem Bityutskiy