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lightnvm: introduce ioctl to initialize device

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Based on the previous patch, we now introduce an ioctl to initialize the
device using nvm_init_sysblock and create the necessary system blocks.
The user may specify the media manager that they wish to instantiate on
top. Default from user-space will be "gennvm".

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-01-12 07:49:37 +01:00 • committed by Jens Axboe
parent e3eb3799f7
commit 5569615424
2 changed files with 61 additions and 0 deletions
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11
include/uapi/linux/lightnvm.h
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@ -101,6 +101,12 @@ struct nvm_ioctl_remove {
__u32 flags;
};
struct nvm_ioctl_dev_init {
char dev[DISK_NAME_LEN]; /* open-channel SSD device */
char mmtype[NVM_MMTYPE_LEN]; /* register to media manager */
__u32 flags;
};
/* The ioctl type, 'L', 0x20 - 0x2F documented in ioctl-number.txt */
enum {
@ -111,6 +117,9 @@ enum {
/* device level cmds */
NVM_DEV_CREATE_CMD,
NVM_DEV_REMOVE_CMD,
/* Init a device to support LightNVM media managers */
NVM_DEV_INIT_CMD,
};
#define NVM_IOCTL 'L' /* 0x4c */
@ -123,6 +132,8 @@ enum {
struct nvm_ioctl_create)
#define NVM_DEV_REMOVE _IOW(NVM_IOCTL, NVM_DEV_REMOVE_CMD, \
struct nvm_ioctl_remove)
#define NVM_DEV_INIT _IOW(NVM_IOCTL, NVM_DEV_INIT_CMD, \
struct nvm_ioctl_dev_init)
#define NVM_VERSION_MAJOR 1
#define NVM_VERSION_MINOR 0