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8b4970c41f
Now that a device can be managed using the system blocks, a method to
reset the device is necessary as well. This patch introduces logic to
reset the device easily to factory state and exposes it through an
ioctl.
The ioctl takes the following flags:
NVM_FACTORY_ERASE_ONLY_USER
By default all blocks, except host-reserved blocks are erased upon
factory reset. Instead of this, only erase host-reserved blocks.
NVM_FACTORY_RESET_HOST_BLKS
Mark host-reserved blocks to be erased and set their type to free.
NVM_FACTORY_RESET_GRWN_BBLKS
Mark "grown bad blocks" to be erased and set their type to free.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/*
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* Copyright (C) 2015 CNEX Labs. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*/
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#ifndef _UAPI_LINUX_LIGHTNVM_H
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#define _UAPI_LINUX_LIGHTNVM_H
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/ioctl.h>
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#else /* __KERNEL__ */
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#include <stdio.h>
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#include <sys/ioctl.h>
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#define DISK_NAME_LEN 32
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#endif /* __KERNEL__ */
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#define NVM_TTYPE_NAME_MAX 48
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#define NVM_TTYPE_MAX 63
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#define NVM_MMTYPE_LEN 8
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#define NVM_CTRL_FILE "/dev/lightnvm/control"
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struct nvm_ioctl_info_tgt {
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__u32 version[3];
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__u32 reserved;
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char tgtname[NVM_TTYPE_NAME_MAX];
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};
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struct nvm_ioctl_info {
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__u32 version[3]; /* in/out - major, minor, patch */
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__u16 tgtsize; /* number of targets */
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__u16 reserved16; /* pad to 4K page */
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__u32 reserved[12];
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struct nvm_ioctl_info_tgt tgts[NVM_TTYPE_MAX];
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};
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enum {
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NVM_DEVICE_ACTIVE = 1 << 0,
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};
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struct nvm_ioctl_device_info {
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char devname[DISK_NAME_LEN];
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char bmname[NVM_TTYPE_NAME_MAX];
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__u32 bmversion[3];
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__u32 flags;
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__u32 reserved[8];
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};
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struct nvm_ioctl_get_devices {
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__u32 nr_devices;
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__u32 reserved[31];
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struct nvm_ioctl_device_info info[31];
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};
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struct nvm_ioctl_create_simple {
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__u32 lun_begin;
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__u32 lun_end;
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};
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enum {
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NVM_CONFIG_TYPE_SIMPLE = 0,
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};
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struct nvm_ioctl_create_conf {
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__u32 type;
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union {
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struct nvm_ioctl_create_simple s;
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};
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};
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struct nvm_ioctl_create {
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char dev[DISK_NAME_LEN]; /* open-channel SSD device */
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char tgttype[NVM_TTYPE_NAME_MAX]; /* target type name */
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char tgtname[DISK_NAME_LEN]; /* dev to expose target as */
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__u32 flags;
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struct nvm_ioctl_create_conf conf;
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};
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struct nvm_ioctl_remove {
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char tgtname[DISK_NAME_LEN];
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__u32 flags;
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};
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struct nvm_ioctl_dev_init {
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char dev[DISK_NAME_LEN]; /* open-channel SSD device */
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char mmtype[NVM_MMTYPE_LEN]; /* register to media manager */
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__u32 flags;
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};
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enum {
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NVM_FACTORY_ERASE_ONLY_USER = 1 << 0, /* erase only blocks used as
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* host blks or grown blks */
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NVM_FACTORY_RESET_HOST_BLKS = 1 << 1, /* remove host blk marks */
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NVM_FACTORY_RESET_GRWN_BBLKS = 1 << 2, /* remove grown blk marks */
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NVM_FACTORY_NR_BITS = 1 << 3, /* stops here */
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};
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struct nvm_ioctl_dev_factory {
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char dev[DISK_NAME_LEN];
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__u32 flags;
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};
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/* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */
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enum {
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/* top level cmds */
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NVM_INFO_CMD = 0x20,
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NVM_GET_DEVICES_CMD,
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/* device level cmds */
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NVM_DEV_CREATE_CMD,
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NVM_DEV_REMOVE_CMD,
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/* Init a device to support LightNVM media managers */
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NVM_DEV_INIT_CMD,
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/* Factory reset device */
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NVM_DEV_FACTORY_CMD,
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};
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#define NVM_IOCTL 'L' /* 0x4c */
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#define NVM_INFO _IOWR(NVM_IOCTL, NVM_INFO_CMD, \
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struct nvm_ioctl_info)
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#define NVM_GET_DEVICES _IOR(NVM_IOCTL, NVM_GET_DEVICES_CMD, \
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struct nvm_ioctl_get_devices)
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#define NVM_DEV_CREATE _IOW(NVM_IOCTL, NVM_DEV_CREATE_CMD, \
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struct nvm_ioctl_create)
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#define NVM_DEV_REMOVE _IOW(NVM_IOCTL, NVM_DEV_REMOVE_CMD, \
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struct nvm_ioctl_remove)
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#define NVM_DEV_INIT _IOW(NVM_IOCTL, NVM_DEV_INIT_CMD, \
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struct nvm_ioctl_dev_init)
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#define NVM_DEV_FACTORY _IOW(NVM_IOCTL, NVM_DEV_FACTORY_CMD, \
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struct nvm_ioctl_dev_factory)
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#define NVM_VERSION_MAJOR 1
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#define NVM_VERSION_MINOR 0
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#define NVM_VERSION_PATCHLEVEL 0
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#endif
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