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This exposes ioctl and sysfs methods a user can invoke to request the driver rescan a controller and its namespaces. This is less harsh than doing a controller reset, which temporarilly halts all IO, just to surface a newly attached namespace. This is mainly useful for controllers that implement the namespace management command, but do not support the namespace notify change asynchronous event notification. Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Jens Axboe <axboe@fb.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* Definitions for the NVM Express ioctl interface
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* Copyright (c) 2011-2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _UAPI_LINUX_NVME_IOCTL_H
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#define _UAPI_LINUX_NVME_IOCTL_H
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#include <linux/types.h>
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struct nvme_user_io {
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__u8 opcode;
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__u8 flags;
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__u16 control;
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__u16 nblocks;
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__u16 rsvd;
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__u64 metadata;
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__u64 addr;
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__u64 slba;
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__u32 dsmgmt;
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__u32 reftag;
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__u16 apptag;
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__u16 appmask;
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};
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struct nvme_passthru_cmd {
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__u8 opcode;
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__u8 flags;
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__u16 rsvd1;
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__u32 nsid;
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__u32 cdw2;
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__u32 cdw3;
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__u64 metadata;
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__u64 addr;
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__u32 metadata_len;
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__u32 data_len;
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__u32 cdw10;
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__u32 cdw11;
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__u32 cdw12;
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__u32 cdw13;
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__u32 cdw14;
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__u32 cdw15;
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__u32 timeout_ms;
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__u32 result;
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};
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#define nvme_admin_cmd nvme_passthru_cmd
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#define NVME_IOCTL_ID _IO('N', 0x40)
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#define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd)
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#define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io)
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#define NVME_IOCTL_IO_CMD _IOWR('N', 0x43, struct nvme_passthru_cmd)
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#define NVME_IOCTL_RESET _IO('N', 0x44)
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#define NVME_IOCTL_SUBSYS_RESET _IO('N', 0x45)
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#define NVME_IOCTL_RESCAN _IO('N', 0x46)
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#endif /* _UAPI_LINUX_NVME_IOCTL_H */
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