Our asprintf and vasprintf have different prototypes than the glibc functions. This causes trouble when we want to share barebox code with userspace code. Change the prototypes for (v)asprintf to match the glibc prototypes. Since the current (v)asprintf are convenient to use change the existing functions to b(v)asprintf. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1469 lines
28 KiB
C
1469 lines
28 KiB
C
/*
|
|
* nfs.c - barebox NFS driver
|
|
*
|
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* Copyright (c) 2014 Uwe Kleine-König, Pengutronix
|
|
* Copyright (c) 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
|
|
* Copyright (c) Masami Komiya <mkomiya@sonare.it> 2004
|
|
*
|
|
* Based on U-Boot NFS code which is based on NetBSD code with
|
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* major changes to support nfs3.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
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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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|
|
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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>
|
|
#include <linux/sizes.h>
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|
#include <byteorder.h>
|
|
#include <globalvar.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
|
|
#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
|
|
|
|
/* values for enum nfsstat3 */
|
|
#define NFS3_OK 0
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|
#define NFS3ERR_PERM 1
|
|
#define NFS3ERR_NOENT 2
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|
#define NFS3ERR_IO 5
|
|
#define NFS3ERR_NXIO 6
|
|
#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
|
|
#define NFS3ERR_FBIG 27
|
|
#define NFS3ERR_NOSPC 28
|
|
#define NFS3ERR_ROFS 30
|
|
#define NFS3ERR_MLINK 31
|
|
#define NFS3ERR_NAMETOOLONG 63
|
|
#define NFS3ERR_NOTEMPTY 66
|
|
#define NFS3ERR_DQUOT 69
|
|
#define NFS3ERR_STALE 70
|
|
#define NFS3ERR_REMOTE 71
|
|
#define NFS3ERR_BADHANDLE 10001
|
|
#define NFS3ERR_NOT_SYNC 10002
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|
#define NFS3ERR_BAD_COOKIE 10003
|
|
#define NFS3ERR_NOTSUPP 10004
|
|
#define NFS3ERR_TOOSMALL 10005
|
|
#define NFS3ERR_SERVERFAULT 10006
|
|
#define NFS3ERR_BADTYPE 10007
|
|
#define NFS3ERR_JUKEBOX 10008
|
|
|
|
static void *nfs_packet;
|
|
static int nfs_len;
|
|
|
|
struct rpc_call {
|
|
uint32_t id;
|
|
uint32_t type;
|
|
uint32_t rpcvers;
|
|
uint32_t prog;
|
|
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 {
|
|
uint32_t id;
|
|
uint32_t type;
|
|
uint32_t rstatus;
|
|
uint32_t verifier;
|
|
uint32_t v2;
|
|
uint32_t astatus;
|
|
uint32_t data[0];
|
|
};
|
|
|
|
#define NFS_TIMEOUT (2 * SECOND)
|
|
#define NFS_MAX_RESEND 5
|
|
|
|
struct nfs_priv {
|
|
struct net_connection *con;
|
|
IPaddr_t server;
|
|
char *path;
|
|
uint16_t mount_port;
|
|
unsigned manual_mount_port:1;
|
|
uint16_t nfs_port;
|
|
unsigned manual_nfs_port:1;
|
|
uint32_t rpc_id;
|
|
uint32_t rootfh_len;
|
|
char rootfh[NFS3_FHSIZE];
|
|
};
|
|
|
|
struct file_priv {
|
|
struct kfifo *fifo;
|
|
void *buf;
|
|
uint32_t filefh_len;
|
|
char filefh[NFS3_FHSIZE];
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|
struct nfs_priv *npriv;
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|
};
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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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|
|
|
/*
|
|
* common types used in more than one request:
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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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|
*
|
|
* typedef uint64 cookie3;
|
|
* 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
|
|
* };
|
|
*
|
|
* struct specdata3 {
|
|
* uint32 specdata1;
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|
* uint32 specdata2;
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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 {
|
|
* ftype3 type;
|
|
* mode3 mode;
|
|
* 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;
|
|
* uint64_t fsid;
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|
* fileid3 fileid;
|
|
* nfstime3 atime;
|
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* nfstime3 mtime;
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|
* nfstime3 ctime;
|
|
* };
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|
*
|
|
* struct diropargs3 {
|
|
* nfs_fh3 dir;
|
|
* filename3 name;
|
|
* }
|
|
*
|
|
* union post_op_attr switch (bool attributes_follow) {
|
|
* case TRUE:
|
|
* fattr3 attributes;
|
|
* case FALSE:
|
|
* void;
|
|
* };
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|
*/
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|
|
|
struct xdr_stream {
|
|
__be32 *p;
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|
void *buf;
|
|
__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;
|
|
|
|
/*
|
|
* 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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|
*/
|
|
struct xdr_stream stream;
|
|
struct dirent ent;
|
|
struct file_priv *priv;
|
|
uint64_t cookie;
|
|
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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|
{
|
|
__be32 *p = xdr->p;
|
|
__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;
|
|
return p;
|
|
}
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|
|
|
static __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (nbytes == 0)
|
|
return xdr->p;
|
|
if (xdr->p == xdr->end)
|
|
return NULL;
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|
p = __xdr_inline_decode(xdr, nbytes);
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|
|
|
return p;
|
|
}
|
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|
|
/*
|
|
* name is expected to point to a buffer with a size of at least 256 bytes.
|
|
*/
|
|
static int decode_filename(struct xdr_stream *xdr, char *name, u32 *length)
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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;
|
|
count = ntoh32(net_read_uint32(p));
|
|
if (count > 255)
|
|
goto out_nametoolong;
|
|
p = xdr_inline_decode(xdr, count);
|
|
if (!p)
|
|
goto out_overflow;
|
|
memcpy(name, p, count);
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|
name[count] = 0;
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|
*length = count;
|
|
return 0;
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|
|
|
out_nametoolong:
|
|
printf("%s: returned a too long filename: %u\n", __func__, count);
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|
return -ENAMETOOLONG;
|
|
|
|
out_overflow:
|
|
printf("%s: premature end of packet\n", __func__);
|
|
return -EIO;
|
|
}
|
|
|
|
/*
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|
* rpc_add_credentials - Add RPC authentication/verifier entries
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|
*/
|
|
static uint32_t *rpc_add_credentials(uint32_t *p)
|
|
{
|
|
/*
|
|
* *BSD refuses AUTH_NONE, so use AUTH_UNIX. An empty hostname is OK for
|
|
* both Linux and *BSD.
|
|
*/
|
|
|
|
/* Provide an AUTH_UNIX credential. */
|
|
*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 */
|
|
/* memcpy(p, "", 0); p += 0; <- empty host name */
|
|
|
|
*p++ = 0; /* uid */
|
|
*p++ = 0; /* gid */
|
|
*p++ = 0; /* auxiliary gid list */
|
|
|
|
/* Provide an AUTH_NONE verifier. */
|
|
*p++ = 0; /* AUTH_NONE */
|
|
*p++ = 0; /* auth length */
|
|
|
|
return p;
|
|
}
|
|
|
|
static int rpc_check_reply(unsigned char *pkt,
|
|
int rpc_prog, uint32_t rpc_id, int *nfserr)
|
|
{
|
|
uint32_t *data;
|
|
struct rpc_reply rpc;
|
|
|
|
*nfserr = 0;
|
|
|
|
if (!pkt)
|
|
return -EAGAIN;
|
|
|
|
memcpy(&rpc, pkt, sizeof(rpc));
|
|
|
|
if (ntoh32(rpc.id) != rpc_id) {
|
|
if (rpc_id - ntoh32(rpc.id) == 1)
|
|
/* stale packet, wait a bit longer */
|
|
return 0;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (rpc.rstatus ||
|
|
rpc.verifier ||
|
|
rpc.astatus ) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (rpc_prog == PROG_PORTMAP)
|
|
return 0;
|
|
|
|
data = (uint32_t *)(pkt + sizeof(struct rpc_reply));
|
|
*nfserr = ntoh32(net_read_uint32(data));
|
|
*nfserr = -*nfserr;
|
|
|
|
debug("%s: state: %d, err %d\n", __func__, nfs_state, *nfserr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* rpc_req - synchronous RPC request
|
|
*/
|
|
static int rpc_req(struct nfs_priv *npriv, int rpc_prog, int rpc_proc,
|
|
uint32_t *data, int datalen)
|
|
{
|
|
struct rpc_call pkt;
|
|
unsigned short dport;
|
|
int ret;
|
|
unsigned char *payload = net_udp_get_payload(npriv->con);
|
|
int nfserr;
|
|
int tries = 0;
|
|
|
|
npriv->rpc_id++;
|
|
|
|
pkt.id = hton32(npriv->rpc_id);
|
|
pkt.type = hton32(MSG_CALL);
|
|
pkt.rpcvers = hton32(2); /* use RPC version 2 */
|
|
pkt.prog = hton32(rpc_prog);
|
|
pkt.proc = hton32(rpc_proc);
|
|
|
|
debug("%s: prog: %d, proc: %d\n", __func__, rpc_prog, rpc_proc);
|
|
|
|
if (rpc_prog == PROG_PORTMAP) {
|
|
dport = SUNRPC_PORT;
|
|
pkt.vers = hton32(2);
|
|
} else if (rpc_prog == PROG_MOUNT) {
|
|
dport = npriv->mount_port;
|
|
pkt.vers = hton32(3);
|
|
} else {
|
|
dport = npriv->nfs_port;
|
|
pkt.vers = hton32(3);
|
|
}
|
|
|
|
memcpy(payload, &pkt, sizeof(pkt));
|
|
memcpy(payload + sizeof(pkt), data, datalen * sizeof(uint32_t));
|
|
|
|
npriv->con->udp->uh_dport = hton16(dport);
|
|
|
|
again:
|
|
ret = net_udp_send(npriv->con,
|
|
sizeof(pkt) + datalen * sizeof(uint32_t));
|
|
|
|
nfs_timer_start = get_time_ns();
|
|
|
|
nfs_state = STATE_START;
|
|
nfs_packet = NULL;
|
|
|
|
while (nfs_state != STATE_DONE) {
|
|
if (ctrlc()) {
|
|
ret = -EINTR;
|
|
break;
|
|
}
|
|
net_poll();
|
|
|
|
if (is_timeout(nfs_timer_start, NFS_TIMEOUT)) {
|
|
tries++;
|
|
if (tries == NFS_MAX_RESEND)
|
|
return -ETIMEDOUT;
|
|
goto again;
|
|
}
|
|
|
|
ret = rpc_check_reply(nfs_packet, rpc_prog,
|
|
npriv->rpc_id, &nfserr);
|
|
if (!ret) {
|
|
ret = nfserr;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* rpc_lookup_req - Lookup RPC Port numbers
|
|
*/
|
|
static int rpc_lookup_req(struct nfs_priv *npriv, uint32_t prog, uint32_t ver)
|
|
{
|
|
uint32_t data[16];
|
|
int ret;
|
|
uint32_t port;
|
|
|
|
data[0] = 0; data[1] = 0; /* auth credential */
|
|
data[2] = 0; data[3] = 0; /* auth verifier */
|
|
data[4] = hton32(prog);
|
|
data[5] = hton32(ver);
|
|
data[6] = hton32(17); /* IP_UDP */
|
|
data[7] = 0;
|
|
|
|
ret = rpc_req(npriv, PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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)
|
|
{
|
|
*p++ = hton32(val);
|
|
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->priv = 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->priv;
|
|
|
|
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->priv;
|
|
|
|
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->priv;
|
|
|
|
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 char *rootnfsopts;
|
|
|
|
static void nfs_set_rootarg(struct nfs_priv *npriv, struct fs_device_d *fsdev)
|
|
{
|
|
char *str, *tmp;
|
|
const char *ip;
|
|
|
|
ip = ip_to_string(npriv->server);
|
|
str = basprintf("root=/dev/nfs nfsroot=%s:%s%s%s", ip, npriv->path,
|
|
rootnfsopts[0] ? "," : "", rootnfsopts);
|
|
|
|
/* forward specific mount options on demand */
|
|
if (npriv->manual_nfs_port == 1) {
|
|
tmp = basprintf("%s,port=%hu", str, npriv->nfs_port);
|
|
free(str);
|
|
str = tmp;
|
|
}
|
|
|
|
if (npriv->manual_mount_port == 1) {
|
|
tmp = basprintf("%s,mountport=%hu", str, npriv->mount_port);
|
|
free(str);
|
|
str = tmp;
|
|
}
|
|
|
|
fsdev_set_linux_rootarg(fsdev, str);
|
|
|
|
free(str);
|
|
}
|
|
|
|
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, SUNRPC_PORT, 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;
|
|
} else {
|
|
npriv->manual_mount_port = 1;
|
|
}
|
|
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;
|
|
} else {
|
|
npriv->manual_nfs_port = 1;
|
|
}
|
|
debug("nfs port: %d\n", npriv->nfs_port);
|
|
|
|
ret = nfs_mount_req(npriv);
|
|
if (ret) {
|
|
printf("mounting failed with %d\n", ret);
|
|
goto err2;
|
|
}
|
|
|
|
nfs_set_rootarg(npriv, fsdev);
|
|
|
|
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)
|
|
{
|
|
rootnfsopts = xstrdup("v3,tcp");
|
|
|
|
globalvar_add_simple_string("linux.rootnfsopts", &rootnfsopts);
|
|
|
|
return register_fs_driver(&nfs_driver);
|
|
}
|
|
coredevice_initcall(nfs_init);
|