ebpf: experiments.

This commit is contained in:
David Anderson
2021-11-10 12:15:03 -08:00
parent 4a51050c49
commit 41710e1b81
973 changed files with 185491 additions and 0 deletions

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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* Upcall description for nfsdcld communication
*
* Copyright (c) 2012 Red Hat, Inc.
* Author(s): Jeff Layton <jlayton@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _NFSD_CLD_H
#define _NFSD_CLD_H
#include <linux/types.h>
/* latest upcall version available */
#define CLD_UPCALL_VERSION 2
/* defined by RFC3530 */
#define NFS4_OPAQUE_LIMIT 1024
#ifndef SHA256_DIGEST_SIZE
#define SHA256_DIGEST_SIZE 32
#endif
enum cld_command {
Cld_Create, /* create a record for this cm_id */
Cld_Remove, /* remove record of this cm_id */
Cld_Check, /* is this cm_id allowed? */
Cld_GraceDone, /* grace period is complete */
Cld_GraceStart, /* grace start (upload client records) */
Cld_GetVersion, /* query max supported upcall version */
};
/* representation of long-form NFSv4 client ID */
struct cld_name {
__u16 cn_len; /* length of cm_id */
unsigned char cn_id[NFS4_OPAQUE_LIMIT]; /* client-provided */
} __attribute__((packed));
/* sha256 hash of the kerberos principal */
struct cld_princhash {
__u8 cp_len; /* length of cp_data */
unsigned char cp_data[SHA256_DIGEST_SIZE]; /* hash of principal */
} __attribute__((packed));
struct cld_clntinfo {
struct cld_name cc_name;
struct cld_princhash cc_princhash;
} __attribute__((packed));
/* message struct for communication with userspace */
struct cld_msg {
__u8 cm_vers; /* upcall version */
__u8 cm_cmd; /* upcall command */
__s16 cm_status; /* return code */
__u32 cm_xid; /* transaction id */
union {
__s64 cm_gracetime; /* grace period start time */
struct cld_name cm_name;
__u8 cm_version; /* for getting max version */
} __attribute__((packed)) cm_u;
} __attribute__((packed));
/* version 2 message can include hash of kerberos principal */
struct cld_msg_v2 {
__u8 cm_vers; /* upcall version */
__u8 cm_cmd; /* upcall command */
__s16 cm_status; /* return code */
__u32 cm_xid; /* transaction id */
union {
struct cld_name cm_name;
__u8 cm_version; /* for getting max version */
struct cld_clntinfo cm_clntinfo; /* name & princ hash */
} __attribute__((packed)) cm_u;
} __attribute__((packed));
struct cld_msg_hdr {
__u8 cm_vers; /* upcall version */
__u8 cm_cmd; /* upcall command */
__s16 cm_status; /* return code */
__u32 cm_xid; /* transaction id */
} __attribute__((packed));
#endif /* !_NFSD_CLD_H */

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* linux/include/linux/nfsd/debug.h
*
* Debugging-related stuff for nfsd
*
* Copyright (C) 1995 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef LINUX_NFSD_DEBUG_H
#define LINUX_NFSD_DEBUG_H
#include <linux/sunrpc/debug.h>
/*
* knfsd debug flags
*/
#define NFSDDBG_SOCK 0x0001
#define NFSDDBG_FH 0x0002
#define NFSDDBG_EXPORT 0x0004
#define NFSDDBG_SVC 0x0008
#define NFSDDBG_PROC 0x0010
#define NFSDDBG_FILEOP 0x0020
#define NFSDDBG_AUTH 0x0040
#define NFSDDBG_REPCACHE 0x0080
#define NFSDDBG_XDR 0x0100
#define NFSDDBG_LOCKD 0x0200
#define NFSDDBG_PNFS 0x0400
#define NFSDDBG_ALL 0x7FFF
#define NFSDDBG_NOCHANGE 0xFFFF
#endif /* LINUX_NFSD_DEBUG_H */

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* include/linux/nfsd/export.h
*
* Public declarations for NFS exports. The definitions for the
* syscall interface are in nfsctl.h
*
* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef NFSD_EXPORT_H
#define NFSD_EXPORT_H
# include <linux/types.h>
/*
* Important limits for the exports stuff.
*/
#define NFSCLNT_IDMAX 1024
#define NFSCLNT_ADDRMAX 16
#define NFSCLNT_KEYMAX 32
/*
* Export flags.
*
* Please update the expflags[] array in fs/nfsd/export.c when adding
* a new flag.
*/
#define NFSEXP_READONLY 0x0001
#define NFSEXP_INSECURE_PORT 0x0002
#define NFSEXP_ROOTSQUASH 0x0004
#define NFSEXP_ALLSQUASH 0x0008
#define NFSEXP_ASYNC 0x0010
#define NFSEXP_GATHERED_WRITES 0x0020
#define NFSEXP_NOREADDIRPLUS 0x0040
#define NFSEXP_SECURITY_LABEL 0x0080
/* 0x100 currently unused */
#define NFSEXP_NOHIDE 0x0200
#define NFSEXP_NOSUBTREECHECK 0x0400
#define NFSEXP_NOAUTHNLM 0x0800 /* Don't authenticate NLM requests - just trust */
#define NFSEXP_MSNFS 0x1000 /* do silly things that MS clients expect; no longer supported */
#define NFSEXP_FSID 0x2000
#define NFSEXP_CROSSMOUNT 0x4000
#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
/*
* The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
* clients, and only to the single directory that is the root of the
* export; further lookup and readdir operations are treated as if every
* subdirectory was a mountpoint, and ignored if they are not themselves
* exported. This is used by nfsd and mountd to construct the NFSv4
* pseudofilesystem, which provides access only to paths leading to each
* exported filesystem.
*/
#define NFSEXP_V4ROOT 0x10000
#define NFSEXP_PNFS 0x20000
/* All flags that we claim to support. (Note we don't support NOACL.) */
#define NFSEXP_ALLFLAGS 0x3FEFF
/* The flags that may vary depending on security flavor: */
#define NFSEXP_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
| NFSEXP_ALLSQUASH \
| NFSEXP_INSECURE_PORT)
#endif /* NFSD_EXPORT_H */

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* This file describes the layout of the file handles as passed
* over the wire.
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef _LINUX_NFSD_FH_H
#define _LINUX_NFSD_FH_H
#include <linux/types.h>
#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
/*
* This is the old "dentry style" Linux NFSv2 file handle.
*
* The xino and xdev fields are currently used to transport the
* ino/dev of the exported inode.
*/
struct nfs_fhbase_old {
__u32 fb_dcookie; /* dentry cookie - always 0xfeebbaca */
__u32 fb_ino; /* our inode number */
__u32 fb_dirino; /* dir inode number, 0 for directories */
__u32 fb_dev; /* our device */
__u32 fb_xdev;
__u32 fb_xino;
__u32 fb_generation;
};
/*
* This is the new flexible, extensible style NFSv2/v3/v4 file handle.
* by Neil Brown <neilb@cse.unsw.edu.au> - March 2000
*
* The file handle starts with a sequence of four-byte words.
* The first word contains a version number (1) and three descriptor bytes
* that tell how the remaining 3 variable length fields should be handled.
* These three bytes are auth_type, fsid_type and fileid_type.
*
* All four-byte values are in host-byte-order.
*
* The auth_type field is deprecated and must be set to 0.
*
* The fsid_type identifies how the filesystem (or export point) is
* encoded.
* Current values:
* 0 - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
* NOTE: we cannot use the kdev_t device id value, because kdev_t.h
* says we mustn't. We must break it up and reassemble.
* 1 - 4 byte user specified identifier
* 2 - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
* 3 - 4 byte device id, encoded for user-space, 4 byte inode number
* 4 - 4 byte inode number and 4 byte uuid
* 5 - 8 byte uuid
* 6 - 16 byte uuid
* 7 - 8 byte inode number and 16 byte uuid
*
* The fileid_type identified how the file within the filesystem is encoded.
* The values for this field are filesystem specific, exccept that
* filesystems must not use the values '0' or '0xff'. 'See enum fid_type'
* in include/linux/exportfs.h for currently registered values.
*/
struct nfs_fhbase_new {
union {
struct {
__u8 fb_version_aux; /* == 1, even => nfs_fhbase_old */
__u8 fb_auth_type_aux;
__u8 fb_fsid_type_aux;
__u8 fb_fileid_type_aux;
__u32 fb_auth[1];
/* __u32 fb_fsid[0]; floating */
/* __u32 fb_fileid[0]; floating */
};
struct {
__u8 fb_version; /* == 1, even => nfs_fhbase_old */
__u8 fb_auth_type;
__u8 fb_fsid_type;
__u8 fb_fileid_type;
__u32 fb_auth_flex[]; /* flexible-array member */
};
};
};
struct knfsd_fh {
unsigned int fh_size; /* significant for NFSv3.
* Points to the current size while building
* a new file handle
*/
union {
struct nfs_fhbase_old fh_old;
__u32 fh_pad[NFS4_FHSIZE/4];
struct nfs_fhbase_new fh_new;
} fh_base;
};
#define ofh_dcookie fh_base.fh_old.fb_dcookie
#define ofh_ino fh_base.fh_old.fb_ino
#define ofh_dirino fh_base.fh_old.fb_dirino
#define ofh_dev fh_base.fh_old.fb_dev
#define ofh_xdev fh_base.fh_old.fb_xdev
#define ofh_xino fh_base.fh_old.fb_xino
#define ofh_generation fh_base.fh_old.fb_generation
#define fh_version fh_base.fh_new.fb_version
#define fh_fsid_type fh_base.fh_new.fb_fsid_type
#define fh_auth_type fh_base.fh_new.fb_auth_type
#define fh_fileid_type fh_base.fh_new.fb_fileid_type
#define fh_fsid fh_base.fh_new.fb_auth_flex
/* Do not use, provided for userspace compatiblity. */
#define fh_auth fh_base.fh_new.fb_auth
#endif /* _LINUX_NFSD_FH_H */

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* linux/include/linux/nfsd/stats.h
*
* Statistics for NFS server.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef LINUX_NFSD_STATS_H
#define LINUX_NFSD_STATS_H
#include <linux/nfs4.h>
/* thread usage wraps very million seconds (approx one fortnight) */
#define NFSD_USAGE_WRAP (HZ*1000000)
#endif /* LINUX_NFSD_STATS_H */