NAME

       nvme-dir-send - Issue a directive send command, returns applicable results

SYNOPSIS

       nvme dir-send <device> [--namespace-id=<nsid> | -n <nsid>]
                                 [--data-len=<data-len> | -l <data-len>]
                                 [--dir-type=<dtype> | -D <dtype>]
                                 [--dir-spec=<dspec> | -S <dspec>]
                                 [--dir-oper=<doper> | -O <doper>]
                                 [--endir=<endir> | -e <endir>]
                                 [--target-dir=<tdir> | -T <tdir>]
                                 [--human-readable | -H]
                                 [--raw-binary | -b]

DESCRIPTION

       Submits an NVMe Directive Send admin command and returns the applicable results. This may
       be the combination of directive type, and operation, as well as target directive and its
       enable/disable status of the operation, if specific operation needs it.

       The <device> parameter is mandatory and may be either the NVMe character device (ex:
       /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).

       On success, the returned directive’s parameter structure (if applicable) is returned in
       one of several ways depending on the option flags; the structure may parsed by the program
       and printed in a readable format if it is a known structure, displayed in hex, or the raw
       buffer may be printed to stdout for another program to parse.

OPTIONS

       -n <nsid>, --namespace-id=<nsid>
           Retrieve the feature for the given nsid. This is optional and most features do not use
           this value.

       -D <dtype>, --dir-type=<dtype>
           Directive type

       -S <dspec>, --dir-spec=<dspec>
           Directive specific

       -O <doper>, --dir-oper=<doper>
           Directive operation

       -T <tdir>, --target-dir=<nsr>
           Target directive of the operation

       -e <endir>, --endir=<endir>
           Target directive enable(1) or disable (0) operation

       +

       ┌───────┬────────────────────────┐
       │       │                        │
       │Select │ Description            │
       ├───────┼────────────────────────┤
       │       │                        │
       │0      │ Current                │
       ├───────┼────────────────────────┤
       │       │                        │
       │1      │ Default                │
       ├───────┼────────────────────────┤
       │       │                        │
       │2      │ Saved                  │
       ├───────┼────────────────────────┤
       │       │                        │
       │3      │ Supported capabilities │
       ├───────┼────────────────────────┤
       │       │                        │
       │4–7    │ Reserved               │
       └───────┴────────────────────────┘

       -l <data-len>, --data-len=<data-len>
           The data length for the buffer returned for this feature. Most known features do not
           use this value. The exception is LBA Range Type

       -b, --raw-binary
           Print the raw receive buffer to stdout if the command returns a structure.

       -H, --human-readable
           Print the decoded receive buffer to stdout if the command returns a structure.

EXAMPLES

       •   Enable streams directive :

               # nvme dir-send /dev/nvme0n1 --dir-type 0 --dir-oper 1 --target-dir 1 --endir 1

       •   Disable streams directive :

               # nvme dir-send /dev/nvme0n1 --dir-type 0 --dir-oper 1 --target-dir 1 --endir 0

       •   Release all allocated streams resource :

               # nvme dir-send /dev/nvme0n1 --dir-type 1 --dir-oper 2

       •   Release stream ID 3 :

               # nvme dir-send /dev/nvme0 --dir-type 1 --dir-oper 1 --dir-spec 3

           It is probably a bad idea to not redirect stdout when using this mode.

NVME

       Part of the nvme-user suite