This allows to use unfs3 on the server side which doesn't integrate into portmap/rpcbind which results in the port not being impossible to lookup via rpc calls to the portmap program. Use it like: mount -t nfs -o port=2703,mountport=2703 192.168.77.157:/root /mnt/nfs Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1427 lines
27 KiB
C
1427 lines
27 KiB
C
/*
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* nfs.c - barebox NFS driver
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*
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* Copyright (c) 2014 Uwe Kleine-König, Pengutronix
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* Copyright (c) 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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* Copyright (c) Masami Komiya <mkomiya@sonare.it> 2004
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*
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* Based on U-Boot NFS code which is based on NetBSD code with
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* major changes to support nfs3.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <net.h>
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#include <driver.h>
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#include <fs.h>
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#include <errno.h>
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#include <libgen.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <init.h>
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#include <linux/stat.h>
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#include <linux/err.h>
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#include <kfifo.h>
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#include <sizes.h>
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#include <byteorder.h>
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#include "parseopt.h"
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#define SUNRPC_PORT 111
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#define PROG_PORTMAP 100000
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#define PROG_NFS 100003
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#define PROG_MOUNT 100005
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#define MSG_CALL 0
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#define MSG_REPLY 1
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#define PORTMAP_GETPORT 3
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#define MOUNT_ADDENTRY 1
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#define MOUNT_UMOUNT 3
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#define NFSPROC3_GETATTR 1
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#define NFSPROC3_LOOKUP 3
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#define NFSPROC3_READLINK 5
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#define NFSPROC3_READ 6
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#define NFSPROC3_READDIR 16
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#define NFS3_FHSIZE 64
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#define NFS3_COOKIEVERFSIZE 8
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/* values of enum ftype3 */
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#define NF3REG 1
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#define NF3DIR 2
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#define NF3BLK 3
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#define NF3CHR 4
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#define NF3LNK 5
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#define NF3SOCK 6
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#define NF3FIFO 7
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|
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/* values for enum nfsstat3 */
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#define NFS3_OK 0
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#define NFS3ERR_PERM 1
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#define NFS3ERR_NOENT 2
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#define NFS3ERR_IO 5
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#define NFS3ERR_NXIO 6
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#define NFS3ERR_ACCES 13
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#define NFS3ERR_EXIST 17
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#define NFS3ERR_XDEV 18
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#define NFS3ERR_NODEV 19
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#define NFS3ERR_NOTDIR 20
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#define NFS3ERR_ISDIR 21
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#define NFS3ERR_INVAL 22
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#define NFS3ERR_FBIG 27
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#define NFS3ERR_NOSPC 28
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#define NFS3ERR_ROFS 30
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#define NFS3ERR_MLINK 31
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#define NFS3ERR_NAMETOOLONG 63
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#define NFS3ERR_NOTEMPTY 66
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#define NFS3ERR_DQUOT 69
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#define NFS3ERR_STALE 70
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#define NFS3ERR_REMOTE 71
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#define NFS3ERR_BADHANDLE 10001
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#define NFS3ERR_NOT_SYNC 10002
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#define NFS3ERR_BAD_COOKIE 10003
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#define NFS3ERR_NOTSUPP 10004
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#define NFS3ERR_TOOSMALL 10005
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#define NFS3ERR_SERVERFAULT 10006
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#define NFS3ERR_BADTYPE 10007
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#define NFS3ERR_JUKEBOX 10008
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static void *nfs_packet;
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static int nfs_len;
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struct rpc_call {
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uint32_t id;
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uint32_t type;
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uint32_t rpcvers;
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uint32_t prog;
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uint32_t vers;
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uint32_t proc;
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uint32_t data[0];
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};
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struct rpc_reply {
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uint32_t id;
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uint32_t type;
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uint32_t rstatus;
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uint32_t verifier;
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uint32_t v2;
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uint32_t astatus;
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uint32_t data[0];
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};
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#define NFS_TIMEOUT (2 * SECOND)
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#define NFS_MAX_RESEND 5
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struct nfs_priv {
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struct net_connection *con;
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IPaddr_t server;
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char *path;
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unsigned short mount_port;
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unsigned short nfs_port;
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uint32_t rpc_id;
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uint32_t rootfh_len;
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char rootfh[NFS3_FHSIZE];
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};
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struct file_priv {
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struct kfifo *fifo;
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void *buf;
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uint32_t filefh_len;
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char filefh[NFS3_FHSIZE];
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struct nfs_priv *npriv;
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};
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static uint64_t nfs_timer_start;
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static int nfs_state;
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#define STATE_DONE 1
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#define STATE_START 2
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/*
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* common types used in more than one request:
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*
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* typedef uint32 count3;
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* typedef uint32 gid3;
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* typedef uint32 mode3;
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* typedef uint32 uid3;
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*
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* typedef uint64 cookie3;
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* typedef uint64 fileid3;
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* typedef uint64 size3;
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*
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* typedef string filename3<>;
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* typedef string nfspath3<>;
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*
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* typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
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*
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* enum ftype3 {
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* NF3REG = 1,
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* NF3DIR = 2,
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* NF3BLK = 3,
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* NF3CHR = 4,
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* NF3LNK = 5,
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* NF3SOCK = 6,
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* NF3FIFO = 7
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* };
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*
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* struct specdata3 {
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* uint32 specdata1;
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* uint32 specdata2;
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* };
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*
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* struct nfs_fh3 {
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* opaque data<NFS3_FHSIZE>;
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* }
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*
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* struct nfstime3 {
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* uint32 seconds;
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* uint32 nseconds;
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* };
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*
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* struct fattr3 {
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* ftype3 type;
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* mode3 mode;
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* uint32_t nlink;
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* uid3 uid;
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* gid3 gid;
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* size3 size;
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* size3 used;
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* specdata3 rdev;
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* uint64_t fsid;
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* fileid3 fileid;
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* nfstime3 atime;
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* nfstime3 mtime;
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* nfstime3 ctime;
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* };
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*
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* struct diropargs3 {
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* nfs_fh3 dir;
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* filename3 name;
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* }
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*
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* union post_op_attr switch (bool attributes_follow) {
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* case TRUE:
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* fattr3 attributes;
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* case FALSE:
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* void;
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* };
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*/
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struct xdr_stream {
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__be32 *p;
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void *buf;
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__be32 *end;
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};
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#define xdr_zero 0
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#define XDR_QUADLEN(l) (((l) + 3) >> 2)
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struct nfs_dir {
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DIR dir;
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/*
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* stream points to the next entry3 in the reply member of READDIR3res
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* (if any, to the end indicator otherwise).
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*/
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struct xdr_stream stream;
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struct dirent ent;
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struct file_priv *priv;
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uint64_t cookie;
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char cookieverf[NFS3_COOKIEVERFSIZE];
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};
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static void xdr_init(struct xdr_stream *stream, void *buf, int len)
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{
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stream->p = stream->buf = buf;
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stream->end = stream->buf + len;
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}
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static __be32 *__xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
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{
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__be32 *p = xdr->p;
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__be32 *q = p + XDR_QUADLEN(nbytes);
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if (q > xdr->end || q < p)
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return NULL;
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xdr->p = q;
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return p;
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}
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static __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
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{
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__be32 *p;
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if (nbytes == 0)
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return xdr->p;
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if (xdr->p == xdr->end)
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return NULL;
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p = __xdr_inline_decode(xdr, nbytes);
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return p;
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}
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/*
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* name is expected to point to a buffer with a size of at least 256 bytes.
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*/
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static int decode_filename(struct xdr_stream *xdr, char *name, u32 *length)
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{
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__be32 *p;
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u32 count;
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p = xdr_inline_decode(xdr, 4);
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if (!p)
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goto out_overflow;
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count = ntoh32(net_read_uint32(p));
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if (count > 255)
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goto out_nametoolong;
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p = xdr_inline_decode(xdr, count);
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if (!p)
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goto out_overflow;
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memcpy(name, p, count);
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name[count] = 0;
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*length = count;
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return 0;
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out_nametoolong:
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printf("%s: returned a too long filename: %u\n", __func__, count);
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return -ENAMETOOLONG;
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out_overflow:
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printf("%s: premature end of packet\n", __func__);
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return -EIO;
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}
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/*
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* rpc_add_credentials - Add RPC authentication/verifier entries
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*/
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static uint32_t *rpc_add_credentials(uint32_t *p)
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{
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/*
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* *BSD refuses AUTH_NONE, so use AUTH_UNIX. An empty hostname is OK for
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* both Linux and *BSD.
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*/
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/* Provide an AUTH_UNIX credential. */
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*p++ = hton32(1); /* AUTH_UNIX */
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*p++ = hton32(20); /* auth length: 20 + strlen(hostname) */
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*p++ = hton32(0); /* stamp */
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*p++ = hton32(0); /* hostname string length */
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/* memcpy(p, "", 0); p += 0; <- empty host name */
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*p++ = 0; /* uid */
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*p++ = 0; /* gid */
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*p++ = 0; /* auxiliary gid list */
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/* Provide an AUTH_NONE verifier. */
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*p++ = 0; /* AUTH_NONE */
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*p++ = 0; /* auth length */
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return p;
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}
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static int rpc_check_reply(unsigned char *pkt,
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int rpc_prog, uint32_t rpc_id, int *nfserr)
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{
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uint32_t *data;
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struct rpc_reply rpc;
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*nfserr = 0;
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if (!pkt)
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return -EAGAIN;
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memcpy(&rpc, pkt, sizeof(rpc));
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if (ntoh32(rpc.id) != rpc_id) {
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if (rpc_id - ntoh32(rpc.id) == 1)
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/* stale packet, wait a bit longer */
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return 0;
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return -EINVAL;
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}
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if (rpc.rstatus ||
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rpc.verifier ||
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rpc.astatus ) {
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return -EINVAL;
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}
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if (rpc_prog == PROG_PORTMAP)
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return 0;
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data = (uint32_t *)(pkt + sizeof(struct rpc_reply));
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*nfserr = ntoh32(net_read_uint32(data));
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*nfserr = -*nfserr;
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debug("%s: state: %d, err %d\n", __func__, nfs_state, *nfserr);
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return 0;
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}
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|
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/*
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* rpc_req - synchronous RPC request
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*/
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static int rpc_req(struct nfs_priv *npriv, int rpc_prog, int rpc_proc,
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uint32_t *data, int datalen)
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{
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struct rpc_call pkt;
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unsigned short dport;
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int ret;
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unsigned char *payload = net_udp_get_payload(npriv->con);
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int nfserr;
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int tries = 0;
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npriv->rpc_id++;
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pkt.id = hton32(npriv->rpc_id);
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pkt.type = hton32(MSG_CALL);
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pkt.rpcvers = hton32(2); /* use RPC version 2 */
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pkt.prog = hton32(rpc_prog);
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pkt.proc = hton32(rpc_proc);
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debug("%s: prog: %d, proc: %d\n", __func__, rpc_prog, rpc_proc);
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if (rpc_prog == PROG_PORTMAP) {
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dport = SUNRPC_PORT;
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pkt.vers = hton32(2);
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} else if (rpc_prog == PROG_MOUNT) {
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dport = npriv->mount_port;
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pkt.vers = hton32(3);
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} else {
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dport = npriv->nfs_port;
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pkt.vers = hton32(3);
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}
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memcpy(payload, &pkt, sizeof(pkt));
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memcpy(payload + sizeof(pkt), data, datalen * sizeof(uint32_t));
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npriv->con->udp->uh_dport = hton16(dport);
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again:
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ret = net_udp_send(npriv->con,
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sizeof(pkt) + datalen * sizeof(uint32_t));
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nfs_timer_start = get_time_ns();
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nfs_state = STATE_START;
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nfs_packet = NULL;
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|
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while (nfs_state != STATE_DONE) {
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if (ctrlc()) {
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ret = -EINTR;
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break;
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}
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net_poll();
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|
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if (is_timeout(nfs_timer_start, NFS_TIMEOUT)) {
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tries++;
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if (tries == NFS_MAX_RESEND)
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return -ETIMEDOUT;
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goto again;
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}
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|
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ret = rpc_check_reply(nfs_packet, rpc_prog,
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npriv->rpc_id, &nfserr);
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if (!ret) {
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ret = nfserr;
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break;
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}
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}
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|
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return ret;
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}
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|
|
|
/*
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* rpc_lookup_req - Lookup RPC Port numbers
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*/
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static int rpc_lookup_req(struct nfs_priv *npriv, uint32_t prog, uint32_t ver)
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{
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uint32_t data[16];
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int ret;
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uint32_t port;
|
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|
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data[0] = 0; data[1] = 0; /* auth credential */
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data[2] = 0; data[3] = 0; /* auth verifier */
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data[4] = hton32(prog);
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data[5] = hton32(ver);
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data[6] = hton32(17); /* IP_UDP */
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data[7] = 0;
|
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|
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ret = rpc_req(npriv, PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
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if (ret)
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return ret;
|
|
|
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port = ntoh32(net_read_uint32(nfs_packet + sizeof(struct rpc_reply)));
|
|
return port;
|
|
}
|
|
|
|
static uint32_t *nfs_add_uint32(uint32_t *p, uint32_t val)
|
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{
|
|
*p++ = hton32(val);
|
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return p;
|
|
}
|
|
|
|
static uint32_t *nfs_add_uint64(uint32_t *p, uint64_t val)
|
|
{
|
|
uint64_t nval = hton64(val);
|
|
|
|
memcpy(p, &nval, 8);
|
|
return p + 2;
|
|
}
|
|
|
|
static uint32_t *nfs_add_fh3(uint32_t *p, unsigned fh_len, const char *fh)
|
|
{
|
|
*p++ = hton32(fh_len);
|
|
|
|
/* zero padding */
|
|
if (fh_len & 3)
|
|
p[fh_len / 4] = 0;
|
|
|
|
memcpy(p, fh, fh_len);
|
|
p += DIV_ROUND_UP(fh_len, 4);
|
|
return p;
|
|
}
|
|
|
|
static uint32_t *nfs_add_filename(uint32_t *p,
|
|
uint32_t filename_len, const char *filename)
|
|
{
|
|
*p++ = hton32(filename_len);
|
|
|
|
/* zero padding */
|
|
if (filename_len & 3)
|
|
p[filename_len / 4] = 0;
|
|
|
|
memcpy(p, filename, filename_len);
|
|
p += DIV_ROUND_UP(filename_len, 4);
|
|
return p;
|
|
}
|
|
|
|
/* This is a 1:1 mapping for Linux, the compiler optimizes it out */
|
|
static const struct {
|
|
uint32_t nfsmode;
|
|
unsigned short statmode;
|
|
} nfs3_mode_bits[] = {
|
|
{ 0x00001, S_IXOTH },
|
|
{ 0x00002, S_IWOTH },
|
|
{ 0x00004, S_IROTH },
|
|
{ 0x00008, S_IXGRP },
|
|
{ 0x00010, S_IWGRP },
|
|
{ 0x00020, S_IRGRP },
|
|
{ 0x00040, S_IXUSR },
|
|
{ 0x00080, S_IWUSR },
|
|
{ 0x00100, S_IRUSR },
|
|
{ 0x00200, S_ISVTX },
|
|
{ 0x00400, S_ISGID },
|
|
{ 0x00800, S_ISUID },
|
|
};
|
|
|
|
static int nfs_fattr3_to_stat(uint32_t *p, struct stat *s)
|
|
{
|
|
uint32_t mode;
|
|
size_t i;
|
|
|
|
/* offsetof(struct fattr3, type) = 0 */
|
|
switch (ntoh32(net_read_uint32(p + 0))) {
|
|
case NF3REG:
|
|
s->st_mode = S_IFREG;
|
|
break;
|
|
case NF3DIR:
|
|
s->st_mode = S_IFDIR;
|
|
break;
|
|
case NF3BLK:
|
|
s->st_mode = S_IFBLK;
|
|
break;
|
|
case NF3CHR:
|
|
s->st_mode = S_IFCHR;
|
|
break;
|
|
case NF3LNK:
|
|
s->st_mode = S_IFLNK;
|
|
break;
|
|
case NF3SOCK:
|
|
s->st_mode = S_IFSOCK;
|
|
break;
|
|
case NF3FIFO:
|
|
s->st_mode = S_IFIFO;
|
|
break;
|
|
default:
|
|
printf("%s: invalid mode %x\n",
|
|
__func__, ntoh32(net_read_uint32(p + 0)));
|
|
return -EIO;
|
|
}
|
|
|
|
/* offsetof(struct fattr3, mode) = 4 */
|
|
mode = ntoh32(net_read_uint32(p + 1));
|
|
for (i = 0; i < ARRAY_SIZE(nfs3_mode_bits); ++i) {
|
|
if (mode & nfs3_mode_bits[i].nfsmode)
|
|
s->st_mode |= nfs3_mode_bits[i].statmode;
|
|
}
|
|
|
|
/* offsetof(struct fattr3, size) = 20 */
|
|
s->st_size = ntoh64(net_read_uint64(p + 5));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t *nfs_read_post_op_attr(uint32_t *p, struct stat **s)
|
|
{
|
|
struct stat dummy;
|
|
/*
|
|
* union post_op_attr switch (bool attributes_follow) {
|
|
* case TRUE:
|
|
* fattr3 attributes;
|
|
* case FALSE:
|
|
* void;
|
|
* };
|
|
*/
|
|
|
|
if (ntoh32(net_read_uint32(p++))) {
|
|
nfs_fattr3_to_stat(p, s ? *s : &dummy);
|
|
p += 21;
|
|
} else if (s) {
|
|
/* no attributes available */
|
|
*s = NULL;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* nfs_mount_req - Mount an NFS Filesystem
|
|
*/
|
|
static int nfs_mount_req(struct nfs_priv *npriv)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int pathlen;
|
|
int ret;
|
|
|
|
pathlen = strlen(npriv->path);
|
|
|
|
debug("%s: %s\n", __func__, npriv->path);
|
|
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
*p++ = hton32(pathlen);
|
|
if (pathlen & 3)
|
|
*(p + pathlen / 4) = 0;
|
|
|
|
memcpy (p, npriv->path, pathlen);
|
|
p += (pathlen + 3) / 4;
|
|
|
|
len = p - &(data[0]);
|
|
|
|
ret = rpc_req(npriv, PROG_MOUNT, MOUNT_ADDENTRY, data, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
|
|
npriv->rootfh_len = ntoh32(net_read_uint32(p++));
|
|
if (npriv->rootfh_len > NFS3_FHSIZE) {
|
|
printf("%s: file handle too big: %lu\n", __func__,
|
|
(unsigned long)npriv->rootfh_len);
|
|
return -EIO;
|
|
}
|
|
memcpy(npriv->rootfh, p, npriv->rootfh_len);
|
|
p += DIV_ROUND_UP(npriv->rootfh_len, 4);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* nfs_umountall_req - Unmount all our NFS Filesystems on the Server
|
|
*/
|
|
static void nfs_umount_req(struct nfs_priv *npriv)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int pathlen;
|
|
|
|
pathlen = strlen(npriv->path);
|
|
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
p = nfs_add_filename(p, pathlen, npriv->path);
|
|
|
|
len = p - &(data[0]);
|
|
|
|
rpc_req(npriv, PROG_MOUNT, MOUNT_UMOUNT, data, len);
|
|
}
|
|
|
|
/*
|
|
* nfs_lookup_req - Lookup Pathname
|
|
*
|
|
* *s is set to NULL if LOOKUP3resok doesn't contain obj_attributes.
|
|
*/
|
|
static int nfs_lookup_req(struct file_priv *priv,
|
|
uint32_t filename_len, const char *filename, struct stat **s)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int ret;
|
|
|
|
/*
|
|
* struct LOOKUP3args {
|
|
* diropargs3 what;
|
|
* };
|
|
*
|
|
* struct LOOKUP3resok {
|
|
* nfs_fh3 object;
|
|
* post_op_attr obj_attributes;
|
|
* post_op_attr dir_attributes;
|
|
* };
|
|
*
|
|
* struct LOOKUP3resfail {
|
|
* post_op_attr dir_attributes;
|
|
* };
|
|
*
|
|
* union LOOKUP3res switch (nfsstat3 status) {
|
|
* case NFS3_OK:
|
|
* LOOKUP3resok resok;
|
|
* default:
|
|
* LOOKUP3resfail resfail;
|
|
* };
|
|
*/
|
|
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
/* what.dir */
|
|
p = nfs_add_fh3(p, priv->filefh_len, priv->filefh);
|
|
|
|
/* what.name */
|
|
p = nfs_add_filename(p, filename_len, filename);
|
|
|
|
len = p - &(data[0]);
|
|
|
|
ret = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_LOOKUP, data, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
|
|
priv->filefh_len = ntoh32(net_read_uint32(p++));
|
|
if (priv->filefh_len > NFS3_FHSIZE) {
|
|
debug("%s: file handle too big: %lu\n", __func__,
|
|
(unsigned long)priv->filefh_len);
|
|
return -EIO;
|
|
}
|
|
memcpy(priv->filefh, p, priv->filefh_len);
|
|
p += DIV_ROUND_UP(priv->filefh_len, 4);
|
|
|
|
if (s)
|
|
nfs_read_post_op_attr(p, s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_attr_req(struct file_priv *priv, struct stat *s)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int ret;
|
|
|
|
/*
|
|
* struct GETATTR3args {
|
|
* nfs_fh3 object;
|
|
* }
|
|
*
|
|
* struct GETATTR3resok {
|
|
* fattr3 obj_attributes;
|
|
* };
|
|
*
|
|
* union GETATTR3res switch (nfsstat3 status) {
|
|
* case NFS3_OK:
|
|
* GETATTR3resok resok;
|
|
* default:
|
|
* void;
|
|
* }
|
|
*/
|
|
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
/* object */
|
|
p = nfs_add_fh3(p, priv->filefh_len, priv->filefh);
|
|
|
|
len = p - &(data[0]);
|
|
|
|
ret = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_GETATTR, data, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
|
|
nfs_fattr3_to_stat(p, s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* returns with dir->stream pointing to the first entry
|
|
* of dirlist3 res.resok.reply
|
|
*/
|
|
static void *nfs_readdirattr_req(struct file_priv *priv, struct nfs_dir *dir)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int ret;
|
|
void *buf;
|
|
|
|
/*
|
|
* struct READDIR3args {
|
|
* nfs_fh3 dir;
|
|
* cookie3 cookie;
|
|
* cookieverf3 cookieverf;
|
|
* count3 count;
|
|
* };
|
|
*
|
|
* struct entry3 {
|
|
* fileid3 fileid;
|
|
* filename3 name;
|
|
* cookie3 cookie;
|
|
* entry3 *nextentry;
|
|
* };
|
|
*
|
|
* struct dirlist3 {
|
|
* entry3 *entries;
|
|
* bool eof;
|
|
* };
|
|
*
|
|
* struct READDIR3resok {
|
|
* post_op_attr dir_attributes;
|
|
* cookieverf3 cookieverf;
|
|
* dirlist3 reply;
|
|
* };
|
|
*
|
|
* struct READDIR3resfail {
|
|
* post_op_attr dir_attributes;
|
|
* };
|
|
*
|
|
* union READDIR3res switch (nfsstat3 status) {
|
|
* case NFS3_OK:
|
|
* READDIR3resok resok;
|
|
* default:
|
|
* READDIR3resfail resfail;
|
|
* };
|
|
*/
|
|
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
p = nfs_add_fh3(p, priv->filefh_len, priv->filefh);
|
|
p = nfs_add_uint64(p, dir->cookie);
|
|
|
|
memcpy(p, dir->cookieverf, NFS3_COOKIEVERFSIZE);
|
|
p += NFS3_COOKIEVERFSIZE / 4;
|
|
|
|
p = nfs_add_uint32(p, 1024); /* count */
|
|
|
|
ret = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_READDIR, data, p - data);
|
|
if (ret)
|
|
return NULL;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
p = nfs_read_post_op_attr(p, NULL);
|
|
|
|
/* update cookieverf */
|
|
memcpy(dir->cookieverf, p, NFS3_COOKIEVERFSIZE);
|
|
p += NFS3_COOKIEVERFSIZE / 4;
|
|
|
|
len = nfs_packet + nfs_len - (void *)p;
|
|
if (!len) {
|
|
printf("%s: huh, no payload left\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
buf = xzalloc(len);
|
|
|
|
memcpy(buf, p, len);
|
|
|
|
xdr_init(&dir->stream, buf, len);
|
|
|
|
/* now xdr points to dirlist3 res.resok.reply */
|
|
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* nfs_read_req - Read File on NFS Server
|
|
*/
|
|
static int nfs_read_req(struct file_priv *priv, uint64_t offset,
|
|
uint32_t readlen)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
int len;
|
|
int ret;
|
|
uint32_t rlen, eof;
|
|
|
|
/*
|
|
* struct READ3args {
|
|
* nfs_fh3 file;
|
|
* offset3 offset;
|
|
* count3 count;
|
|
* };
|
|
*
|
|
* struct READ3resok {
|
|
* post_op_attr file_attributes;
|
|
* count3 count;
|
|
* bool eof;
|
|
* opaque data<>;
|
|
* };
|
|
*
|
|
* struct READ3resfail {
|
|
* post_op_attr file_attributes;
|
|
* };
|
|
*
|
|
* union READ3res switch (nfsstat3 status) {
|
|
* case NFS3_OK:
|
|
* READ3resok resok;
|
|
* default:
|
|
* READ3resfail resfail;
|
|
* };
|
|
*/
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
p = nfs_add_fh3(p, priv->filefh_len, priv->filefh);
|
|
p = nfs_add_uint64(p, offset);
|
|
p = nfs_add_uint32(p, readlen);
|
|
|
|
len = p - &(data[0]);
|
|
|
|
ret = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_READ, data, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
|
|
p = nfs_read_post_op_attr(p, NULL);
|
|
|
|
rlen = ntoh32(net_read_uint32(p));
|
|
|
|
/* skip over count */
|
|
p += 1;
|
|
|
|
eof = ntoh32(net_read_uint32(p));
|
|
|
|
/*
|
|
* skip over eof and count embedded in the representation of data
|
|
* assuming it equals rlen above.
|
|
*/
|
|
p += 2;
|
|
|
|
if (readlen && !rlen && !eof)
|
|
return -EIO;
|
|
|
|
kfifo_put(priv->fifo, (char *)p, rlen);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nfs_handler(void *ctx, char *packet, unsigned len)
|
|
{
|
|
char *pkt = net_eth_to_udp_payload(packet);
|
|
|
|
nfs_state = STATE_DONE;
|
|
nfs_packet = pkt;
|
|
nfs_len = len;
|
|
}
|
|
|
|
static int nfs_create(struct device_d *dev, const char *pathname, mode_t mode)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int nfs_unlink(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int nfs_mkdir(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int nfs_rmdir(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int nfs_truncate(struct device_d *dev, FILE *f, ulong size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static struct file_priv *nfs_do_open(struct device_d *dev,
|
|
const char *filename, struct stat **s)
|
|
{
|
|
struct file_priv *priv;
|
|
struct nfs_priv *npriv = dev->priv;
|
|
int ret;
|
|
const char *tok;
|
|
|
|
debug("%s: filename = %s\n", __func__, filename);
|
|
priv = xzalloc(sizeof(*priv));
|
|
|
|
priv->npriv = npriv;
|
|
|
|
if (!*filename) {
|
|
priv->filefh_len = npriv->rootfh_len;
|
|
memcpy(priv->filefh, npriv->rootfh, npriv->rootfh_len);
|
|
return priv;
|
|
}
|
|
|
|
filename++;
|
|
|
|
priv->filefh_len = npriv->rootfh_len;
|
|
memcpy(priv->filefh, npriv->rootfh, NFS3_FHSIZE);
|
|
|
|
while (*filename) {
|
|
size_t flen;
|
|
|
|
tok = strchr(filename, '/');
|
|
if (tok)
|
|
flen = tok - filename;
|
|
else
|
|
flen = strlen(filename);
|
|
|
|
ret = nfs_lookup_req(priv, flen, filename, s);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (tok)
|
|
filename += flen + 1;
|
|
else
|
|
break;
|
|
}
|
|
|
|
return priv;
|
|
|
|
out:
|
|
free(priv);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static void nfs_do_close(struct file_priv *priv)
|
|
{
|
|
if (priv->fifo)
|
|
kfifo_free(priv->fifo);
|
|
|
|
free(priv);
|
|
}
|
|
|
|
static struct file_priv *nfs_do_stat(struct device_d *dev,
|
|
const char *filename, struct stat *s)
|
|
{
|
|
struct file_priv *priv;
|
|
int ret;
|
|
struct stat **sptr = &s;
|
|
|
|
debug("%s: filename = %s\n", __func__, filename);
|
|
priv = nfs_do_open(dev, filename, sptr);
|
|
if (IS_ERR(priv))
|
|
return priv;
|
|
|
|
if (!*sptr) {
|
|
/*
|
|
* The nfs server didn't provide obj_attributes in the lookup
|
|
* reply, so ask for them explicitly.
|
|
*/
|
|
ret = nfs_attr_req(priv, s);
|
|
if (ret) {
|
|
nfs_do_close(priv);
|
|
return ERR_PTR(ret);
|
|
}
|
|
}
|
|
|
|
return priv;
|
|
}
|
|
|
|
static int nfs_readlink_req(struct file_priv *priv, char* buf, size_t size)
|
|
{
|
|
uint32_t data[1024];
|
|
uint32_t *p;
|
|
uint32_t len;
|
|
int ret;
|
|
|
|
/*
|
|
* struct READLINK3args {
|
|
* nfs_fh3 symlink;
|
|
* };
|
|
*
|
|
* struct READLINK3resok {
|
|
* post_op_attr symlink_attributes;
|
|
* nfspath3 data;
|
|
* };
|
|
*
|
|
* struct READLINK3resfail {
|
|
* post_op_attr symlink_attributes;
|
|
* }
|
|
*
|
|
* union READLINK3res switch (nfsstat3 status) {
|
|
* case NFS3_OK:
|
|
* READLINK3resok resok;
|
|
* default:
|
|
* READLINK3resfail resfail;
|
|
* };
|
|
*/
|
|
p = &(data[0]);
|
|
p = rpc_add_credentials(p);
|
|
|
|
p = nfs_add_fh3(p, priv->filefh_len, priv->filefh);
|
|
|
|
len = p - &(data[0]);
|
|
|
|
ret = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_READLINK, data, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
p = nfs_packet + sizeof(struct rpc_reply) + 4;
|
|
|
|
p = nfs_read_post_op_attr(p, NULL);
|
|
|
|
len = ntoh32(net_read_uint32(p)); /* new path length */
|
|
p++;
|
|
|
|
if (len > size)
|
|
return -ENOMEM;
|
|
|
|
memcpy(buf, p, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_readlink(struct device_d *dev, const char *filename,
|
|
char *realname, size_t size)
|
|
{
|
|
struct file_priv *priv;
|
|
int ret;
|
|
|
|
priv = nfs_do_open(dev, filename, NULL);
|
|
if (IS_ERR(priv))
|
|
return PTR_ERR(priv);
|
|
|
|
ret = nfs_readlink_req(priv, realname, size);
|
|
if (ret) {
|
|
nfs_do_close(priv);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_open(struct device_d *dev, FILE *file, const char *filename)
|
|
{
|
|
struct file_priv *priv;
|
|
struct stat s;
|
|
|
|
priv = nfs_do_stat(dev, filename, &s);
|
|
if (IS_ERR(priv))
|
|
return PTR_ERR(priv);
|
|
|
|
file->inode = priv;
|
|
file->size = s.st_size;
|
|
|
|
priv->fifo = kfifo_alloc(1024);
|
|
if (!priv->fifo) {
|
|
free(priv);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_close(struct device_d *dev, FILE *file)
|
|
{
|
|
struct file_priv *priv = file->inode;
|
|
|
|
nfs_do_close(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_write(struct device_d *_dev, FILE *file, const void *inbuf,
|
|
size_t insize)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int nfs_read(struct device_d *dev, FILE *file, void *buf, size_t insize)
|
|
{
|
|
struct file_priv *priv = file->inode;
|
|
|
|
if (insize > 1024)
|
|
insize = 1024;
|
|
|
|
if (insize && !kfifo_len(priv->fifo)) {
|
|
int ret = nfs_read_req(priv, file->pos, insize);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return kfifo_get(priv->fifo, buf, insize);
|
|
}
|
|
|
|
static loff_t nfs_lseek(struct device_d *dev, FILE *file, loff_t pos)
|
|
{
|
|
struct file_priv *priv = file->inode;
|
|
|
|
file->pos = pos;
|
|
kfifo_reset(priv->fifo);
|
|
|
|
return file->pos;
|
|
}
|
|
|
|
static DIR *nfs_opendir(struct device_d *dev, const char *pathname)
|
|
{
|
|
struct file_priv *priv;
|
|
void *buf = NULL;
|
|
struct nfs_dir *dir;
|
|
|
|
priv = nfs_do_open(dev, pathname, NULL);
|
|
if (IS_ERR(priv))
|
|
return NULL;
|
|
|
|
dir = xzalloc(sizeof(*dir));
|
|
dir->priv = priv;
|
|
|
|
/* cookie == 0 and cookieverf == 0 means start of dir */
|
|
buf = nfs_readdirattr_req(priv, dir);
|
|
if (!buf) {
|
|
debug("%s: nfs_readdirattr_req failed\n", __func__);
|
|
goto err;
|
|
}
|
|
|
|
return &dir->dir;
|
|
|
|
err:
|
|
free(buf);
|
|
free(dir);
|
|
nfs_do_close(priv);
|
|
return NULL;
|
|
}
|
|
|
|
static struct dirent *nfs_readdir(struct device_d *dev, DIR *dir)
|
|
{
|
|
struct nfs_dir *ndir = container_of(dir, struct nfs_dir, dir);
|
|
uint32_t *p;
|
|
int ret;
|
|
int len;
|
|
struct xdr_stream *xdr = &ndir->stream;
|
|
|
|
again:
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (!p) {
|
|
printf("%s: premature end of packet\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
if (!net_read_uint32(p)) {
|
|
/* eof? */
|
|
p = xdr_inline_decode(xdr, 4);
|
|
if (!p) {
|
|
printf("%s: premature end of packet\n", __func__);
|
|
return NULL;
|
|
}
|
|
if (net_read_uint32(p))
|
|
return NULL;
|
|
|
|
if (!nfs_readdirattr_req(ndir->priv, ndir)) {
|
|
printf("%s: nfs_readdirattr_req failed\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
goto again;
|
|
}
|
|
|
|
/* there is another entry available in the last reply */
|
|
|
|
/* skip over fileid */
|
|
p = xdr_inline_decode(xdr, 8);
|
|
if (!p) {
|
|
printf("%s: premature end of packet\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
ret = decode_filename(xdr, ndir->ent.d_name, &len);
|
|
if (ret)
|
|
return NULL;
|
|
|
|
p = xdr_inline_decode(xdr, 8);
|
|
if (!p) {
|
|
printf("%s: premature end of packet\n", __func__);
|
|
return NULL;
|
|
}
|
|
ndir->cookie = ntoh64(net_read_uint64(p));
|
|
|
|
return &ndir->ent;
|
|
}
|
|
|
|
static int nfs_closedir(struct device_d *dev, DIR *dir)
|
|
{
|
|
struct nfs_dir *ndir = (void *)dir;
|
|
|
|
nfs_do_close(ndir->priv);
|
|
free(ndir->stream.buf);
|
|
free(ndir);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_stat(struct device_d *dev, const char *filename, struct stat *s)
|
|
{
|
|
struct file_priv *priv;
|
|
|
|
priv = nfs_do_stat(dev, filename, s);
|
|
if (IS_ERR(priv)) {
|
|
return PTR_ERR(priv);
|
|
} else {
|
|
nfs_do_close(priv);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int nfs_probe(struct device_d *dev)
|
|
{
|
|
struct fs_device_d *fsdev = dev_to_fs_device(dev);
|
|
struct nfs_priv *npriv = xzalloc(sizeof(struct nfs_priv));
|
|
char *tmp = xstrdup(fsdev->backingstore);
|
|
char *path;
|
|
int ret;
|
|
|
|
dev->priv = npriv;
|
|
|
|
debug("nfs: mount: %s\n", fsdev->backingstore);
|
|
|
|
path = strchr(tmp, ':');
|
|
if (!path) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
*path = 0;
|
|
|
|
npriv->path = xstrdup(path + 1);
|
|
|
|
npriv->server = resolv(tmp);
|
|
|
|
debug("nfs: server: %s path: %s\n", tmp, npriv->path);
|
|
|
|
npriv->con = net_udp_new(npriv->server, 0, nfs_handler, npriv);
|
|
if (IS_ERR(npriv->con)) {
|
|
ret = PTR_ERR(npriv->con);
|
|
goto err1;
|
|
}
|
|
|
|
/* Need a priviliged source port */
|
|
net_udp_bind(npriv->con, 1000);
|
|
|
|
parseopt_hu(fsdev->options, "mountport", &npriv->mount_port);
|
|
if (!npriv->mount_port) {
|
|
ret = rpc_lookup_req(npriv, PROG_MOUNT, 3);
|
|
if (ret < 0) {
|
|
printf("lookup mount port failed with %d\n", ret);
|
|
goto err2;
|
|
}
|
|
npriv->mount_port = ret;
|
|
}
|
|
debug("mount port: %hu\n", npriv->mount_port);
|
|
|
|
parseopt_hu(fsdev->options, "port", &npriv->nfs_port);
|
|
if (!npriv->nfs_port) {
|
|
ret = rpc_lookup_req(npriv, PROG_NFS, 3);
|
|
if (ret < 0) {
|
|
printf("lookup nfs port failed with %d\n", ret);
|
|
goto err2;
|
|
}
|
|
npriv->nfs_port = ret;
|
|
}
|
|
debug("nfs port: %d\n", npriv->nfs_port);
|
|
|
|
ret = nfs_mount_req(npriv);
|
|
if (ret) {
|
|
printf("mounting failed with %d\n", ret);
|
|
goto err2;
|
|
}
|
|
|
|
free(tmp);
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
net_unregister(npriv->con);
|
|
err1:
|
|
free(npriv->path);
|
|
err:
|
|
free(tmp);
|
|
free(npriv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void nfs_remove(struct device_d *dev)
|
|
{
|
|
struct nfs_priv *npriv = dev->priv;
|
|
|
|
nfs_umount_req(npriv);
|
|
|
|
net_unregister(npriv->con);
|
|
free(npriv->path);
|
|
free(npriv);
|
|
}
|
|
|
|
static struct fs_driver_d nfs_driver = {
|
|
.open = nfs_open,
|
|
.close = nfs_close,
|
|
.read = nfs_read,
|
|
.lseek = nfs_lseek,
|
|
.opendir = nfs_opendir,
|
|
.readdir = nfs_readdir,
|
|
.closedir = nfs_closedir,
|
|
.stat = nfs_stat,
|
|
.create = nfs_create,
|
|
.unlink = nfs_unlink,
|
|
.mkdir = nfs_mkdir,
|
|
.rmdir = nfs_rmdir,
|
|
.write = nfs_write,
|
|
.truncate = nfs_truncate,
|
|
.readlink = nfs_readlink,
|
|
.flags = 0,
|
|
.drv = {
|
|
.probe = nfs_probe,
|
|
.remove = nfs_remove,
|
|
.name = "nfs",
|
|
}
|
|
};
|
|
|
|
static int nfs_init(void)
|
|
{
|
|
return register_fs_driver(&nfs_driver);
|
|
}
|
|
coredevice_initcall(nfs_init);
|