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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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* include/linux/nfsd/export.h

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* Public declarations for NFS exports. The definitions for the

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* syscall interface are in nfsctl.h

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#ifndef NFSD_EXPORT_H

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#define NFSD_EXPORT_H

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# include <linux/types.h>

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* Important limits for the exports stuff.

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#define NFSCLNT_IDMAX 1024

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#define NFSCLNT_ADDRMAX 16

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#define NFSCLNT_KEYMAX 32

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* Export flags.

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* Please update the expflags[] array in fs/nfsd/export.c when adding

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* a new flag.

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#define NFSEXP_READONLY 0x0001

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#define NFSEXP_INSECURE_PORT 0x0002

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#define NFSEXP_ROOTSQUASH 0x0004

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#define NFSEXP_ALLSQUASH 0x0008

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#define NFSEXP_ASYNC 0x0010

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#define NFSEXP_GATHERED_WRITES 0x0020

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#define NFSEXP_NOREADDIRPLUS 0x0040

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#define NFSEXP_SECURITY_LABEL 0x0080

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/* 0x100 currently unused */

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#define NFSEXP_NOHIDE 0x0200

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#define NFSEXP_NOSUBTREECHECK 0x0400

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#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */

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#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */

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#define NFSEXP_FSID 0x2000

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#define NFSEXP_CROSSMOUNT 0x4000

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#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */

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* The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4

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* clients, and only to the single directory that is the root of the

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* export; further lookup and readdir operations are treated as if every

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* subdirectory was a mountpoint, and ignored if they are not themselves

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* exported. This is used by nfsd and mountd to construct the NFSv4

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* pseudofilesystem, which provides access only to paths leading to each

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* exported filesystem.

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#define NFSEXP_V4ROOT 0x10000

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#define NFSEXP_PNFS 0x20000

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/* All flags that we claim to support. (Note we don't support NOACL.) */

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#define NFSEXP_ALLFLAGS 0x3FEFF

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/* The flags that may vary depending on security flavor: */

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#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \

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| NFSEXP_ALLSQUASH \

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| NFSEXP_INSECURE_PORT)

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#endif /* NFSD_EXPORT_H */

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