[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfsd / nfsxdr.c

/*
 * linux/fs/nfsd/nfsxdr.c
 *
 * XDR support for nfsd
 *
 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/types.h>
#include <linux/time.h>
#include <linux/nfs.h>
#include <linux/vfs.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/xdr.h>
#include <linux/mm.h>

#define NFSDDBG_FACILITY		NFSDDBG_XDR

/*
 * Mapping of S_IF* types to NFS file types
 */
static u32	nfs_ftypes[] = {
	NFNON,  NFCHR,  NFCHR, NFBAD,
	NFDIR,  NFBAD,  NFBLK, NFBAD,
	NFREG,  NFBAD,  NFLNK, NFBAD,
	NFSOCK, NFBAD,  NFLNK, NFBAD,
};


/*
 * XDR functions for basic NFS types
 */
static __be32 *
decode_fh(__be32 *p, struct svc_fh *fhp)
{
	fh_init(fhp, NFS_FHSIZE);
	memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
	fhp->fh_handle.fh_size = NFS_FHSIZE;

	/* FIXME: Look up export pointer here and verify
	 * Sun Secure RPC if requested */
	return p + (NFS_FHSIZE >> 2);
}

/* Helper function for NFSv2 ACL code */
__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
{
	return decode_fh(p, fhp);
}

static __be32 *
encode_fh(__be32 *p, struct svc_fh *fhp)
{
	memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
	return p + (NFS_FHSIZE>> 2);
}

/*
 * Decode a file name and make sure that the path contains
 * no slashes or null bytes.
 */
static __be32 *
decode_filename(__be32 *p, char **namp, int *lenp)
{
	char		*name;
	int		i;

	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
		for (i = 0, name = *namp; i < *lenp; i++, name++) {
			if (*name == '\0' || *name == '/')
				return NULL;
		}
	}

	return p;
}

static __be32 *
decode_pathname(__be32 *p, char **namp, int *lenp)
{
	char		*name;
	int		i;

	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
		for (i = 0, name = *namp; i < *lenp; i++, name++) {
			if (*name == '\0')
				return NULL;
		}
	}

	return p;
}

static __be32 *
decode_sattr(__be32 *p, struct iattr *iap)
{
	u32	tmp, tmp1;

	iap->ia_valid = 0;

	/* Sun client bug compatibility check: some sun clients seem to
	 * put 0xffff in the mode field when they mean 0xffffffff.
	 * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
	 */
	if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
		iap->ia_valid |= ATTR_MODE;
		iap->ia_mode = tmp;
	}
	if ((tmp = ntohl(*p++)) != (u32)-1) {
		iap->ia_valid |= ATTR_UID;
		iap->ia_uid = tmp;
	}
	if ((tmp = ntohl(*p++)) != (u32)-1) {
		iap->ia_valid |= ATTR_GID;
		iap->ia_gid = tmp;
	}
	if ((tmp = ntohl(*p++)) != (u32)-1) {
		iap->ia_valid |= ATTR_SIZE;
		iap->ia_size = tmp;
	}
	tmp  = ntohl(*p++); tmp1 = ntohl(*p++);
	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
		iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
		iap->ia_atime.tv_sec = tmp;
		iap->ia_atime.tv_nsec = tmp1 * 1000; 
	}
	tmp  = ntohl(*p++); tmp1 = ntohl(*p++);
	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
		iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
		iap->ia_mtime.tv_sec = tmp;
		iap->ia_mtime.tv_nsec = tmp1 * 1000; 
		/*
		 * Passing the invalid value useconds=1000000 for mtime
		 * is a Sun convention for "set both mtime and atime to
		 * current server time".  It's needed to make permissions
		 * checks for the "touch" program across v2 mounts to
		 * Solaris and Irix boxes work correctly. See description of
		 * sattr in section 6.1 of "NFS Illustrated" by
		 * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
		 */
		if (tmp1 == 1000000)
			iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
	}
	return p;
}

static __be32 *
encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
	     struct kstat *stat)
{
	struct dentry	*dentry = fhp->fh_dentry;
	int type;
	struct timespec time;

	type = (stat->mode & S_IFMT);

	*p++ = htonl(nfs_ftypes[type >> 12]);
	*p++ = htonl((u32) stat->mode);
	*p++ = htonl((u32) stat->nlink);
	*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
	*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));

	if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
		*p++ = htonl(NFS_MAXPATHLEN);
	} else {
		*p++ = htonl((u32) stat->size);
	}
	*p++ = htonl((u32) stat->blksize);
	if (S_ISCHR(type) || S_ISBLK(type))
		*p++ = htonl(new_encode_dev(stat->rdev));
	else
		*p++ = htonl(0xffffffff);
	*p++ = htonl((u32) stat->blocks);
	if (is_fsid(fhp, rqstp->rq_reffh))
		*p++ = htonl((u32) fhp->fh_export->ex_fsid);
	else
		*p++ = htonl(new_encode_dev(stat->dev));
	*p++ = htonl((u32) stat->ino);
	*p++ = htonl((u32) stat->atime.tv_sec);
	*p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
	lease_get_mtime(dentry->d_inode, &time); 
	*p++ = htonl((u32) time.tv_sec);
	*p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0); 
	*p++ = htonl((u32) stat->ctime.tv_sec);
	*p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);

	return p;
}

/* Helper function for NFSv2 ACL code */
__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
{
	struct kstat stat;
	vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
	return encode_fattr(rqstp, p, fhp, &stat);
}

/*
 * XDR decode functions
 */
int
nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
{
	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
{
	if (!(p = decode_fh(p, &args->fh)))
		return 0;
	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_sattrargs *args)
{
	if (!(p = decode_fh(p, &args->fh))
	 || !(p = decode_sattr(p, &args->attrs)))
		return 0;

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_diropargs *args)
{
	if (!(p = decode_fh(p, &args->fh))
	 || !(p = decode_filename(p, &args->name, &args->len)))
		return 0;

	 return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_readargs *args)
{
	unsigned int len;
	int v,pn;
	if (!(p = decode_fh(p, &args->fh)))
		return 0;

	args->offset    = ntohl(*p++);
	len = args->count     = ntohl(*p++);
	p++; /* totalcount - unused */

	if (len > NFSSVC_MAXBLKSIZE_V2)
		len = NFSSVC_MAXBLKSIZE_V2;

	/* set up somewhere to store response.
	 * We take pages, put them on reslist and include in iovec
	 */
	v=0;
	while (len > 0) {
		pn = rqstp->rq_resused++;
		rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
		rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
		len -= rqstp->rq_vec[v].iov_len;
		v++;
	}
	args->vlen = v;
	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_writeargs *args)
{
	unsigned int len;
	int v;
	if (!(p = decode_fh(p, &args->fh)))
		return 0;

	p++;				/* beginoffset */
	args->offset = ntohl(*p++);	/* offset */
	p++;				/* totalcount */
	len = args->len = ntohl(*p++);
	rqstp->rq_vec[0].iov_base = (void*)p;
	rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
				(((void*)p) - rqstp->rq_arg.head[0].iov_base);
	if (len > NFSSVC_MAXBLKSIZE_V2)
		len = NFSSVC_MAXBLKSIZE_V2;
	v = 0;
	while (len > rqstp->rq_vec[v].iov_len) {
		len -= rqstp->rq_vec[v].iov_len;
		v++;
		rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
		rqstp->rq_vec[v].iov_len = PAGE_SIZE;
	}
	rqstp->rq_vec[v].iov_len = len;
	args->vlen = v+1;
	return rqstp->rq_vec[0].iov_len > 0;
}

int
nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_createargs *args)
{
	if (!(p = decode_fh(p, &args->fh))
	 || !(p = decode_filename(p, &args->name, &args->len))
	 || !(p = decode_sattr(p, &args->attrs)))
		return 0;

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_renameargs *args)
{
	if (!(p = decode_fh(p, &args->ffh))
	 || !(p = decode_filename(p, &args->fname, &args->flen))
	 || !(p = decode_fh(p, &args->tfh))
	 || !(p = decode_filename(p, &args->tname, &args->tlen)))
		return 0;

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
{
	if (!(p = decode_fh(p, &args->fh)))
		return 0;
	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_linkargs *args)
{
	if (!(p = decode_fh(p, &args->ffh))
	 || !(p = decode_fh(p, &args->tfh))
	 || !(p = decode_filename(p, &args->tname, &args->tlen)))
		return 0;

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_symlinkargs *args)
{
	if (!(p = decode_fh(p, &args->ffh))
	 || !(p = decode_filename(p, &args->fname, &args->flen))
	 || !(p = decode_pathname(p, &args->tname, &args->tlen))
	 || !(p = decode_sattr(p, &args->attrs)))
		return 0;

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_readdirargs *args)
{
	if (!(p = decode_fh(p, &args->fh)))
		return 0;
	args->cookie = ntohl(*p++);
	args->count  = ntohl(*p++);
	if (args->count > PAGE_SIZE)
		args->count = PAGE_SIZE;

	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);

	return xdr_argsize_check(rqstp, p);
}

/*
 * XDR encode functions
 */
int
nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
{
	return xdr_ressize_check(rqstp, p);
}

int
nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_attrstat *resp)
{
	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
	return xdr_ressize_check(rqstp, p);
}

int
nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_diropres *resp)
{
	p = encode_fh(p, &resp->fh);
	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
	return xdr_ressize_check(rqstp, p);
}

int
nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_readlinkres *resp)
{
	*p++ = htonl(resp->len);
	xdr_ressize_check(rqstp, p);
	rqstp->rq_res.page_len = resp->len;
	if (resp->len & 3) {
		/* need to pad the tail */
		rqstp->rq_res.tail[0].iov_base = p;
		*p = 0;
		rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
	}
	return 1;
}

int
nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_readres *resp)
{
	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
	*p++ = htonl(resp->count);
	xdr_ressize_check(rqstp, p);

	/* now update rqstp->rq_res to reflect data aswell */
	rqstp->rq_res.page_len = resp->count;
	if (resp->count & 3) {
		/* need to pad the tail */
		rqstp->rq_res.tail[0].iov_base = p;
		*p = 0;
		rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
	}
	return 1;
}

int
nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_readdirres *resp)
{
	xdr_ressize_check(rqstp, p);
	p = resp->buffer;
	*p++ = 0;			/* no more entries */
	*p++ = htonl((resp->common.err == nfserr_eof));
	rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;

	return 1;
}

int
nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_statfsres *resp)
{
	struct kstatfs	*stat = &resp->stats;

	*p++ = htonl(NFSSVC_MAXBLKSIZE_V2);	/* max transfer size */
	*p++ = htonl(stat->f_bsize);
	*p++ = htonl(stat->f_blocks);
	*p++ = htonl(stat->f_bfree);
	*p++ = htonl(stat->f_bavail);
	return xdr_ressize_check(rqstp, p);
}

int
nfssvc_encode_entry(struct readdir_cd *ccd, const char *name,
		    int namlen, loff_t offset, ino_t ino, unsigned int d_type)
{
	struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
	__be32	*p = cd->buffer;
	int	buflen, slen;

	/*
	dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
			namlen, name, offset, ino);
	 */

	if (offset > ~((u32) 0)) {
		cd->common.err = nfserr_fbig;
		return -EINVAL;
	}
	if (cd->offset)
		*cd->offset = htonl(offset);
	if (namlen > NFS2_MAXNAMLEN)
		namlen = NFS2_MAXNAMLEN;/* truncate filename */

	slen = XDR_QUADLEN(namlen);
	if ((buflen = cd->buflen - slen - 4) < 0) {
		cd->common.err = nfserr_toosmall;
		return -EINVAL;
	}
	*p++ = xdr_one;				/* mark entry present */
	*p++ = htonl((u32) ino);		/* file id */
	p    = xdr_encode_array(p, name, namlen);/* name length & name */
	cd->offset = p;			/* remember pointer */
	*p++ = htonl(~0U);		/* offset of next entry */

	cd->buflen = buflen;
	cd->buffer = p;
	cd->common.err = nfs_ok;
	return 0;
}

/*
 * XDR release functions
 */
int
nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
					struct nfsd_fhandle *resp)
{
	fh_put(&resp->fh);
	return 1;
}
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* linux/fs/nfsd/nfsxdr.c
1da177e4 LT	3	*
	4	* XDR support for nfsd
	5	*
	6	* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/time.h>
	11	#include <linux/nfs.h>
	12	#include <linux/vfs.h>
	13	#include <linux/sunrpc/xdr.h>
	14	#include <linux/sunrpc/svc.h>
	15	#include <linux/nfsd/nfsd.h>
	16	#include <linux/nfsd/xdr.h>
	17	#include <linux/mm.h>
	18
	19	#define NFSDDBG_FACILITY NFSDDBG_XDR
	20
1da177e4 LT	21	/*
	22	* Mapping of S_IF* types to NFS file types
	23	*/
	24	static u32 nfs_ftypes[] = {
	25	NFNON, NFCHR, NFCHR, NFBAD,
	26	NFDIR, NFBAD, NFBLK, NFBAD,
	27	NFREG, NFBAD, NFLNK, NFBAD,
	28	NFSOCK, NFBAD, NFLNK, NFBAD,
	29	};
	30
	31
	32	/*
	33	* XDR functions for basic NFS types
	34	*/
131a21c2 AV	35	static __be32 *
131a21c2 AV	36	decode_fh(__be32 p, struct svc_fh fhp)
1da177e4 LT	37	{
	38	fh_init(fhp, NFS_FHSIZE);
	39	memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
	40	fhp->fh_handle.fh_size = NFS_FHSIZE;
	41
	42	/* FIXME: Look up export pointer here and verify
	43	* Sun Secure RPC if requested */
	44	return p + (NFS_FHSIZE >> 2);
	45	}
	46
a257cdd0	47	/* Helper function for NFSv2 ACL code */
131a21c2	48	__be32 nfs2svc_decode_fh(__be32 p, struct svc_fh *fhp)
a257cdd0 AG	49	{
	50	return decode_fh(p, fhp);
	51	}
	52
3ee6f61c	53	static __be32 *
131a21c2	54	encode_fh(__be32 p, struct svc_fh fhp)
1da177e4 LT	55	{
	56	memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
	57	return p + (NFS_FHSIZE>> 2);
	58	}
	59
	60	/*
	61	* Decode a file name and make sure that the path contains
	62	* no slashes or null bytes.
	63	*/
3ee6f61c	64	static __be32 *
131a21c2	65	decode_filename(__be32 p, char namp, int lenp)
1da177e4 LT	66	{
	67	char *name;
	68	int i;
	69
	70	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
	71	for (i = 0, name = namp; i < lenp; i++, name++) {
	72	if (name == '\0' \|\| name == '/')
	73	return NULL;
	74	}
	75	}
	76
	77	return p;
	78	}
	79
3ee6f61c	80	static __be32 *
131a21c2	81	decode_pathname(__be32 p, char namp, int lenp)
1da177e4 LT	82	{
	83	char *name;
	84	int i;
	85
	86	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
	87	for (i = 0, name = namp; i < lenp; i++, name++) {
	88	if (*name == '\0')
	89	return NULL;
	90	}
	91	}
	92
	93	return p;
	94	}
	95
3ee6f61c	96	static __be32 *
131a21c2	97	decode_sattr(__be32 p, struct iattr iap)
1da177e4 LT	98	{
	99	u32 tmp, tmp1;
	100
	101	iap->ia_valid = 0;
	102
	103	/* Sun client bug compatibility check: some sun clients seem to
	104	* put 0xffff in the mode field when they mean 0xffffffff.
	105	* Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
	106	*/
	107	if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
	108	iap->ia_valid \|= ATTR_MODE;
	109	iap->ia_mode = tmp;
	110	}
	111	if ((tmp = ntohl(*p++)) != (u32)-1) {
	112	iap->ia_valid \|= ATTR_UID;
	113	iap->ia_uid = tmp;
	114	}
	115	if ((tmp = ntohl(*p++)) != (u32)-1) {
	116	iap->ia_valid \|= ATTR_GID;
	117	iap->ia_gid = tmp;
	118	}
	119	if ((tmp = ntohl(*p++)) != (u32)-1) {
	120	iap->ia_valid \|= ATTR_SIZE;
	121	iap->ia_size = tmp;
	122	}
	123	tmp = ntohl(p++); tmp1 = ntohl(p++);
	124	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
	125	iap->ia_valid \|= ATTR_ATIME \| ATTR_ATIME_SET;
	126	iap->ia_atime.tv_sec = tmp;
	127	iap->ia_atime.tv_nsec = tmp1 * 1000;
	128	}
	129	tmp = ntohl(p++); tmp1 = ntohl(p++);
	130	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
	131	iap->ia_valid \|= ATTR_MTIME \| ATTR_MTIME_SET;
	132	iap->ia_mtime.tv_sec = tmp;
	133	iap->ia_mtime.tv_nsec = tmp1 * 1000;
	134	/*
	135	* Passing the invalid value useconds=1000000 for mtime
	136	* is a Sun convention for "set both mtime and atime to
	137	* current server time". It's needed to make permissions
	138	* checks for the "touch" program across v2 mounts to
	139	* Solaris and Irix boxes work correctly. See description of
	140	* sattr in section 6.1 of "NFS Illustrated" by
	141	* Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
	142	*/
	143	if (tmp1 == 1000000)
	144	iap->ia_valid &= ~(ATTR_ATIME_SET\|ATTR_MTIME_SET);
	145	}
	146	return p;
	147	}
	148
131a21c2 AV	149	static __be32 *
131a21c2 AV	150	encode_fattr(struct svc_rqst rqstp, __be32 p, struct svc_fh *fhp,
a334de28	151	struct kstat *stat)
1da177e4	152	{
1da177e4	153	struct dentry *dentry = fhp->fh_dentry;
1da177e4 LT	154	int type;
	155	struct timespec time;
	156
a334de28	157	type = (stat->mode & S_IFMT);
1da177e4 LT	158
1da177e4 LT	159	*p++ = htonl(nfs_ftypes[type >> 12]);
a334de28 DS	160	*p++ = htonl((u32) stat->mode);
	161	*p++ = htonl((u32) stat->nlink);
	162	*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
	163	*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
1da177e4	164
a334de28	165	if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
1da177e4 LT	166	*p++ = htonl(NFS_MAXPATHLEN);
1da177e4 LT	167	} else {
a334de28	168	*p++ = htonl((u32) stat->size);
1da177e4	169	}
a334de28	170	*p++ = htonl((u32) stat->blksize);
1da177e4	171	if (S_ISCHR(type) \|\| S_ISBLK(type))
a334de28	172	*p++ = htonl(new_encode_dev(stat->rdev));
1da177e4 LT	173	else
1da177e4 LT	174	*p++ = htonl(0xffffffff);
a334de28	175	*p++ = htonl((u32) stat->blocks);
1da177e4 LT	176	if (is_fsid(fhp, rqstp->rq_reffh))
	177	*p++ = htonl((u32) fhp->fh_export->ex_fsid);
	178	else
a334de28 DS	179	*p++ = htonl(new_encode_dev(stat->dev));
	180	*p++ = htonl((u32) stat->ino);
	181	*p++ = htonl((u32) stat->atime.tv_sec);
	182	*p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
1da177e4 LT	183	lease_get_mtime(dentry->d_inode, &time);
	184	*p++ = htonl((u32) time.tv_sec);
	185	*p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
a334de28 DS	186	*p++ = htonl((u32) stat->ctime.tv_sec);
a334de28 DS	187	*p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
1da177e4 LT	188
	189	return p;
	190	}
	191
a257cdd0	192	/* Helper function for NFSv2 ACL code */
131a21c2	193	__be32 nfs2svc_encode_fattr(struct svc_rqst rqstp, __be32 p, struct svc_fh fhp)
a257cdd0	194	{
a334de28 DS	195	struct kstat stat;
	196	vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
	197	return encode_fattr(rqstp, p, fhp, &stat);
a257cdd0	198	}
1da177e4 LT	199
	200	/*
	201	* XDR decode functions
	202	*/
	203	int
131a21c2	204	nfssvc_decode_void(struct svc_rqst rqstp, __be32 p, void *dummy)
1da177e4 LT	205	{
	206	return xdr_argsize_check(rqstp, p);
	207	}
	208
	209	int
131a21c2	210	nfssvc_decode_fhandle(struct svc_rqst rqstp, __be32 p, struct nfsd_fhandle *args)
1da177e4 LT	211	{
	212	if (!(p = decode_fh(p, &args->fh)))
	213	return 0;
	214	return xdr_argsize_check(rqstp, p);
	215	}
	216
	217	int
131a21c2	218	nfssvc_decode_sattrargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	219	struct nfsd_sattrargs *args)
	220	{
	221	if (!(p = decode_fh(p, &args->fh))
	222	\|\| !(p = decode_sattr(p, &args->attrs)))
	223	return 0;
	224
	225	return xdr_argsize_check(rqstp, p);
	226	}
	227
	228	int
131a21c2	229	nfssvc_decode_diropargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	230	struct nfsd_diropargs *args)
	231	{
	232	if (!(p = decode_fh(p, &args->fh))
	233	\|\| !(p = decode_filename(p, &args->name, &args->len)))
	234	return 0;
	235
	236	return xdr_argsize_check(rqstp, p);
	237	}
	238
	239	int
131a21c2	240	nfssvc_decode_readargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	241	struct nfsd_readargs *args)
	242	{
	243	unsigned int len;
	244	int v,pn;
	245	if (!(p = decode_fh(p, &args->fh)))
	246	return 0;
	247
	248	args->offset = ntohl(*p++);
	249	len = args->count = ntohl(*p++);
	250	p++; /* totalcount - unused */
	251
7adae489 GB	252	if (len > NFSSVC_MAXBLKSIZE_V2)
7adae489 GB	253	len = NFSSVC_MAXBLKSIZE_V2;
1da177e4 LT	254
	255	/* set up somewhere to store response.
	256	* We take pages, put them on reslist and include in iovec
	257	*/
	258	v=0;
	259	while (len > 0) {
44524359	260	pn = rqstp->rq_resused++;
3cc03b16 N	261	rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
	262	rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
	263	len -= rqstp->rq_vec[v].iov_len;
1da177e4 LT	264	v++;
	265	}
	266	args->vlen = v;
	267	return xdr_argsize_check(rqstp, p);
	268	}
	269
	270	int
131a21c2	271	nfssvc_decode_writeargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	272	struct nfsd_writeargs *args)
	273	{
	274	unsigned int len;
	275	int v;
	276	if (!(p = decode_fh(p, &args->fh)))
	277	return 0;
	278
	279	p++; /* beginoffset */
	280	args->offset = ntohl(p++); / offset */
	281	p++; /* totalcount */
	282	len = args->len = ntohl(*p++);
3cc03b16 N	283	rqstp->rq_vec[0].iov_base = (void*)p;
3cc03b16 N	284	rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
1da177e4	285	(((void*)p) - rqstp->rq_arg.head[0].iov_base);
7adae489 GB	286	if (len > NFSSVC_MAXBLKSIZE_V2)
7adae489 GB	287	len = NFSSVC_MAXBLKSIZE_V2;
1da177e4	288	v = 0;
3cc03b16 N	289	while (len > rqstp->rq_vec[v].iov_len) {
3cc03b16 N	290	len -= rqstp->rq_vec[v].iov_len;
1da177e4	291	v++;
3cc03b16 N	292	rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
3cc03b16 N	293	rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1da177e4	294	}
3cc03b16	295	rqstp->rq_vec[v].iov_len = len;
1da177e4	296	args->vlen = v+1;
3cc03b16	297	return rqstp->rq_vec[0].iov_len > 0;
1da177e4 LT	298	}
	299
	300	int
131a21c2	301	nfssvc_decode_createargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	302	struct nfsd_createargs *args)
	303	{
	304	if (!(p = decode_fh(p, &args->fh))
	305	\|\| !(p = decode_filename(p, &args->name, &args->len))
	306	\|\| !(p = decode_sattr(p, &args->attrs)))
	307	return 0;
	308
	309	return xdr_argsize_check(rqstp, p);
	310	}
	311
	312	int
131a21c2	313	nfssvc_decode_renameargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	314	struct nfsd_renameargs *args)
	315	{
	316	if (!(p = decode_fh(p, &args->ffh))
	317	\|\| !(p = decode_filename(p, &args->fname, &args->flen))
	318	\|\| !(p = decode_fh(p, &args->tfh))
	319	\|\| !(p = decode_filename(p, &args->tname, &args->tlen)))
	320	return 0;
	321
	322	return xdr_argsize_check(rqstp, p);
	323	}
	324
	325	int
131a21c2	326	nfssvc_decode_readlinkargs(struct svc_rqst rqstp, __be32 p, struct nfsd_readlinkargs *args)
1da177e4 LT	327	{
	328	if (!(p = decode_fh(p, &args->fh)))
	329	return 0;
44524359	330	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
1da177e4 LT	331
	332	return xdr_argsize_check(rqstp, p);
	333	}
	334
	335	int
131a21c2	336	nfssvc_decode_linkargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	337	struct nfsd_linkargs *args)
	338	{
	339	if (!(p = decode_fh(p, &args->ffh))
	340	\|\| !(p = decode_fh(p, &args->tfh))
	341	\|\| !(p = decode_filename(p, &args->tname, &args->tlen)))
	342	return 0;
	343
	344	return xdr_argsize_check(rqstp, p);
	345	}
	346
	347	int
131a21c2	348	nfssvc_decode_symlinkargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	349	struct nfsd_symlinkargs *args)
	350	{
	351	if (!(p = decode_fh(p, &args->ffh))
	352	\|\| !(p = decode_filename(p, &args->fname, &args->flen))
	353	\|\| !(p = decode_pathname(p, &args->tname, &args->tlen))
	354	\|\| !(p = decode_sattr(p, &args->attrs)))
	355	return 0;
	356
	357	return xdr_argsize_check(rqstp, p);
	358	}
	359
	360	int
131a21c2	361	nfssvc_decode_readdirargs(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	362	struct nfsd_readdirargs *args)
	363	{
	364	if (!(p = decode_fh(p, &args->fh)))
	365	return 0;
	366	args->cookie = ntohl(*p++);
	367	args->count = ntohl(*p++);
	368	if (args->count > PAGE_SIZE)
	369	args->count = PAGE_SIZE;
	370
44524359	371	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
1da177e4 LT	372
	373	return xdr_argsize_check(rqstp, p);
	374	}
	375
	376	/*
	377	* XDR encode functions
	378	*/
	379	int
131a21c2	380	nfssvc_encode_void(struct svc_rqst rqstp, __be32 p, void *dummy)
1da177e4 LT	381	{
	382	return xdr_ressize_check(rqstp, p);
	383	}
	384
	385	int
131a21c2	386	nfssvc_encode_attrstat(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	387	struct nfsd_attrstat *resp)
1da177e4 LT	388	{
a334de28	389	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	390	return xdr_ressize_check(rqstp, p);
	391	}
	392
	393	int
131a21c2	394	nfssvc_encode_diropres(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	395	struct nfsd_diropres *resp)
	396	{
	397	p = encode_fh(p, &resp->fh);
a334de28	398	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	399	return xdr_ressize_check(rqstp, p);
	400	}
	401
	402	int
131a21c2	403	nfssvc_encode_readlinkres(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	404	struct nfsd_readlinkres *resp)
	405	{
	406	*p++ = htonl(resp->len);
	407	xdr_ressize_check(rqstp, p);
	408	rqstp->rq_res.page_len = resp->len;
	409	if (resp->len & 3) {
	410	/* need to pad the tail */
1da177e4 LT	411	rqstp->rq_res.tail[0].iov_base = p;
	412	*p = 0;
	413	rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
	414	}
	415	return 1;
	416	}
	417
	418	int
131a21c2	419	nfssvc_encode_readres(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	420	struct nfsd_readres *resp)
1da177e4 LT	421	{
a334de28	422	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	423	*p++ = htonl(resp->count);
	424	xdr_ressize_check(rqstp, p);
	425
	426	/* now update rqstp->rq_res to reflect data aswell */
	427	rqstp->rq_res.page_len = resp->count;
	428	if (resp->count & 3) {
	429	/* need to pad the tail */
1da177e4 LT	430	rqstp->rq_res.tail[0].iov_base = p;
	431	*p = 0;
	432	rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
	433	}
	434	return 1;
	435	}
	436
	437	int
131a21c2	438	nfssvc_encode_readdirres(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	439	struct nfsd_readdirres *resp)
	440	{
	441	xdr_ressize_check(rqstp, p);
	442	p = resp->buffer;
	443	p++ = 0; / no more entries */
	444	*p++ = htonl((resp->common.err == nfserr_eof));
	445	rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
	446
	447	return 1;
	448	}
	449
	450	int
131a21c2	451	nfssvc_encode_statfsres(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	452	struct nfsd_statfsres *resp)
	453	{
	454	struct kstatfs *stat = &resp->stats;
	455
7adae489	456	p++ = htonl(NFSSVC_MAXBLKSIZE_V2); / max transfer size */
1da177e4 LT	457	*p++ = htonl(stat->f_bsize);
	458	*p++ = htonl(stat->f_blocks);
	459	*p++ = htonl(stat->f_bfree);
	460	*p++ = htonl(stat->f_bavail);
	461	return xdr_ressize_check(rqstp, p);
	462	}
	463
	464	int
	465	nfssvc_encode_entry(struct readdir_cd ccd, const char name,
	466	int namlen, loff_t offset, ino_t ino, unsigned int d_type)
	467	{
	468	struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
131a21c2	469	__be32 *p = cd->buffer;
1da177e4 LT	470	int buflen, slen;
	471
	472	/*
	473	dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
	474	namlen, name, offset, ino);
	475	*/
	476
	477	if (offset > ~((u32) 0)) {
	478	cd->common.err = nfserr_fbig;
	479	return -EINVAL;
	480	}
	481	if (cd->offset)
	482	*cd->offset = htonl(offset);
	483	if (namlen > NFS2_MAXNAMLEN)
	484	namlen = NFS2_MAXNAMLEN;/* truncate filename */
	485
	486	slen = XDR_QUADLEN(namlen);
	487	if ((buflen = cd->buflen - slen - 4) < 0) {
	488	cd->common.err = nfserr_toosmall;
	489	return -EINVAL;
	490	}
	491	p++ = xdr_one; / mark entry present */
	492	p++ = htonl((u32) ino); / file id */
	493	p = xdr_encode_array(p, name, namlen);/* name length & name */
	494	cd->offset = p; /* remember pointer */
131a21c2	495	p++ = htonl(~0U); / offset of next entry */
1da177e4 LT	496
	497	cd->buflen = buflen;
	498	cd->buffer = p;
	499	cd->common.err = nfs_ok;
	500	return 0;
	501	}
	502
	503	/*
	504	* XDR release functions
	505	*/
	506	int
131a21c2	507	nfssvc_release_fhandle(struct svc_rqst rqstp, __be32 p,
1da177e4 LT	508	struct nfsd_fhandle *resp)
	509	{
	510	fh_put(&resp->fh);
	511	return 1;
	512	}