Commit 6bb4e95c authored Feb 06, 2024 by Zhihao Cheng

ubi: fastmap: Add control in 'UBI_IOCATT' ioctl to reserve PEBs for filling pools

mainline inclusion
from mainline-v6.7-rc1
commit ac085cfe57df2cc1d7a5c4c5e64b8780c8ad452f
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I9195H
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ac085cfe57df2cc1d7a5c4c5e64b8780c8ad452f

-------------------------------------------------

This patch imports a new field 'need_resv_pool' in struct 'ubi_attach_req'
to control whether or not reserving free PEBs for filling pool/wl_pool.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217787


Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

parent 11e111ae

drivers/mtd/ubi/cdev.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1042,7 +1042,7 @@ static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd,
		mutex_lock(&ubi_devices_mutex);
		err = ubi_attach_mtd_dev(mtd, req.ubi_num, req.vid_hdr_offset,
		req.max_beb_per1024, !!req.disable_fm,
		false);
		!!req.need_resv_pool);
		mutex_unlock(&ubi_devices_mutex);
		if (err < 0)
		put_mtd_device(mtd);

include/uapi/mtd/ubi-user.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -248,6 +248,7 @@ enum {
		* @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
		* @padding: reserved for future, not used, has to be zeroed
		* @disable_fm: whether disable fastmap
		* @need_resv_pool: whether reserve free pebs for filling pool/wl_pool
		*
		* This data structure is used to specify MTD device UBI has to attach and the
		* parameters it has to use. The number which should be assigned to the new UBI
		@@ -293,7 +294,8 @@ struct ubi_attach_req {
		__s32 vid_hdr_offset;
		__s16 max_beb_per1024;
		__s8 disable_fm;
		__s8 padding[9];
		__s8 need_resv_pool;
		__s8 padding[8];
		};

		/*