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| author | Ezequiel Garcia <ezequiel.garcia@free-electrons.com> | 2014-02-25 17:25:22 +0100 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2014-02-28 15:29:48 +0100 |
| commit | 9d54c8a33eec78289b1b3f6e10874719c27ce0a7 (patch) | |
| tree | ba34d64d9dcc1b923f0556da5678ab854b4c529d /drivers/mtd/ubi/Makefile | |
| parent | UBI: fix some use after free bugs (diff) | |
| download | linux-9d54c8a33eec78289b1b3f6e10874719c27ce0a7.tar.xz linux-9d54c8a33eec78289b1b3f6e10874719c27ce0a7.zip | |
UBI: R/O block driver on top of UBI volumes
This commit introduces read-only block device emulation on top of UBI volumes.
Given UBI takes care of wear leveling and bad block management it's possible
to add a thin layer to enable block device access to UBI volumes.
This allows to use a block-oriented filesystem on a flash device.
The UBI block devices are meant to be used in conjunction with any
regular, block-oriented file system (e.g. ext4), although it's primarily
targeted at read-only file systems, such as squashfs.
Block devices are created upon user request through new ioctls:
UBI_IOCVOLATTBLK to attach and UBI_IOCVOLDETBLK to detach.
Also, a new UBI module parameter is added 'ubi.block'. This parameter is
needed in order to attach a block device on boot-up time, allowing to
mount the rootfs on a ubiblock device.
For instance, you could have these kernel parameters:
ubi.mtd=5 ubi.block=0,0 root=/dev/ubiblock0_0
Or, if you compile ubi as a module:
$ modprobe ubi mtd=/dev/mtd5 block=/dev/ubi0_0
Artem: amend commentaries and massage the patch a little bit.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/ubi/Makefile')
| -rw-r--r-- | drivers/mtd/ubi/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/Makefile b/drivers/mtd/ubi/Makefile index b46b0c978581..4e3c3d70d8c3 100644 --- a/drivers/mtd/ubi/Makefile +++ b/drivers/mtd/ubi/Makefile @@ -3,5 +3,6 @@ obj-$(CONFIG_MTD_UBI) += ubi.o ubi-y += vtbl.o vmt.o upd.o build.o cdev.o kapi.o eba.o io.o wl.o attach.o ubi-y += misc.o debug.o ubi-$(CONFIG_MTD_UBI_FASTMAP) += fastmap.o +ubi-$(CONFIG_MTD_UBI_BLOCK) += block.o obj-$(CONFIG_MTD_UBI_GLUEBI) += gluebi.o |