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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
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/*
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* 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
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* 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
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* Made nbd_end_request() use the io_request_lock
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* 2001 Copyright (C) Steven Whitehouse
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* New nbd_end_request() for compatibility with new linux block
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* layer code.
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* 2003/06/24 Louis D. Langholtz <ldl@aros.net>
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* Removed unneeded blksize_bits field from nbd_device struct.
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* Cleanup PARANOIA usage & code.
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* 2004/02/19 Paul Clements
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* Removed PARANOIA, plus various cleanup and comments
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*/
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#ifndef _UAPILINUX_NBD_H
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#define _UAPILINUX_NBD_H
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#include <linux/types.h>
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#define NBD_SET_SOCK _IO( 0xab, 0 )
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#define NBD_SET_BLKSIZE _IO( 0xab, 1 )
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#define NBD_SET_SIZE _IO( 0xab, 2 )
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#define NBD_DO_IT _IO( 0xab, 3 )
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#define NBD_CLEAR_SOCK _IO( 0xab, 4 )
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#define NBD_CLEAR_QUE _IO( 0xab, 5 )
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#define NBD_PRINT_DEBUG _IO( 0xab, 6 )
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#define NBD_SET_SIZE_BLOCKS _IO( 0xab, 7 )
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#define NBD_DISCONNECT _IO( 0xab, 8 )
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#define NBD_SET_TIMEOUT _IO( 0xab, 9 )
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#define NBD_SET_FLAGS _IO( 0xab, 10)
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enum {
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NBD_CMD_READ = 0,
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NBD_CMD_WRITE = 1,
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NBD_CMD_DISC = 2,
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NBD_CMD_FLUSH = 3,
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NBD_CMD_TRIM = 4
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};
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/* values for flags field, these are server interaction specific. */
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#define NBD_FLAG_HAS_FLAGS (1 << 0) /* nbd-server supports flags */
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#define NBD_FLAG_READ_ONLY (1 << 1) /* device is read-only */
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#define NBD_FLAG_SEND_FLUSH (1 << 2) /* can flush writeback cache */
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#define NBD_FLAG_SEND_FUA (1 << 3) /* send FUA (forced unit access) */
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/* there is a gap here to match userspace */
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#define NBD_FLAG_SEND_TRIM (1 << 5) /* send trim/discard */
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#define NBD_FLAG_CAN_MULTI_CONN (1 << 8) /* Server supports multiple connections per export. */
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/* values for cmd flags in the upper 16 bits of request type */
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#define NBD_CMD_FLAG_FUA (1 << 16) /* FUA (forced unit access) op */
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/* These are client behavior specific flags. */
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#define NBD_CFLAG_DESTROY_ON_DISCONNECT (1 << 0) /* delete the nbd device on
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disconnect. */
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/* userspace doesn't need the nbd_device structure */
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/* These are sent over the network in the request/reply magic fields */
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#define NBD_REQUEST_MAGIC 0x25609513
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#define NBD_REPLY_MAGIC 0x67446698
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/* Do *not* use magics: 0x12560953 0x96744668. */
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/*
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* This is the packet used for communication between client and
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* server. All data are in network byte order.
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*/
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struct nbd_request {
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__be32 magic;
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__be32 type; /* == READ || == WRITE */
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char handle[8];
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__be64 from;
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__be32 len;
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} __attribute__((packed));
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/*
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* This is the reply packet that nbd-server sends back to the client after
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* it has completed an I/O request (or an error occurs).
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*/
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struct nbd_reply {
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__be32 magic;
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__be32 error; /* 0 = ok, else error */
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char handle[8]; /* handle you got from request */
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};
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#endif /* _UAPILINUX_NBD_H */
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