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| author |   Matias Bjørling <m@bjorling.me> | 2016-01-12 07:49:39 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2016-01-12 08:21:18 -0700 |
| commit | 8b4970c41f88ad772771f87b1c82c395248a84d8 (patch) | |
| tree | 4667e602605483b9be057e43ecbd57f4a2f0a047 /include/uapi | |
| parent | lightnvm: use system block for mm initialization (diff) | |
| download | linux-dev-8b4970c41f88ad772771f87b1c82c395248a84d8.tar.xz linux-dev-8b4970c41f88ad772771f87b1c82c395248a84d8.zip | |
lightnvm: introduce factory reset
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>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/lightnvm.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/lightnvm.h b/include/uapi/linux/lightnvm.h index 56339e2e0a46..774a43128a7a 100644 --- a/include/uapi/linux/lightnvm.h +++ b/include/uapi/linux/lightnvm.h @@ -108,6 +108,20 @@ struct nvm_ioctl_dev_init { __u32 flags; }; +enum { + NVM_FACTORY_ERASE_ONLY_USER = 1 << 0, /* erase only blocks used as + * host blks or grown blks */ + NVM_FACTORY_RESET_HOST_BLKS = 1 << 1, /* remove host blk marks */ + NVM_FACTORY_RESET_GRWN_BBLKS = 1 << 2, /* remove grown blk marks */ + NVM_FACTORY_NR_BITS = 1 << 3, /* stops here */ +}; + +struct nvm_ioctl_dev_factory { + char dev[DISK_NAME_LEN]; + + __u32 flags; +}; + /* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */ enum { /* top level cmds */ @@ -120,6 +134,9 @@ enum { /* Init a device to support LightNVM media managers */ NVM_DEV_INIT_CMD, + + /* Factory reset device */ + NVM_DEV_FACTORY_CMD, }; #define NVM_IOCTL 'L' /* 0x4c */ @@ -134,6 +151,8 @@ enum { struct nvm_ioctl_remove) #define NVM_DEV_INIT _IOW(NVM_IOCTL, NVM_DEV_INIT_CMD, \ struct nvm_ioctl_dev_init) +#define NVM_DEV_FACTORY _IOW(NVM_IOCTL, NVM_DEV_FACTORY_CMD, \ + struct nvm_ioctl_dev_factory) #define NVM_VERSION_MAJOR 1 #define NVM_VERSION_MINOR 0 |