[linux-2.6-block.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


#ifdef NFSD_OPTIMIZE_SPACE
# define inline
#endif

/*
 * 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 u32 *
decode_fh(u32 *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 */
u32 *nfs2svc_decode_fh(u32 *p, struct svc_fh *fhp)
{
	return decode_fh(p, fhp);
}

static inline u32 *
encode_fh(u32 *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 inline u32 *
decode_filename(u32 *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 inline u32 *
decode_pathname(u32 *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 inline u32 *
decode_sattr(u32 *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 u32 *
encode_fattr(struct svc_rqst *rqstp, u32 *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 */
u32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, u32 *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, u32 *p, void *dummy)
{
	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_fhandle(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *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, u32 *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)
		len = NFSSVC_MAXBLKSIZE;

	/* 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;
		svc_take_page(rqstp);
		args->vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
		args->vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
		len -= args->vec[v].iov_len;
		v++;
	}
	args->vlen = v;
	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_writeargs(struct svc_rqst *rqstp, u32 *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++);
	args->vec[0].iov_base = (void*)p;
	args->vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
				(((void*)p) - rqstp->rq_arg.head[0].iov_base);
	if (len > NFSSVC_MAXBLKSIZE)
		len = NFSSVC_MAXBLKSIZE;
	v = 0;
	while (len > args->vec[v].iov_len) {
		len -= args->vec[v].iov_len;
		v++;
		args->vec[v].iov_base = page_address(rqstp->rq_argpages[v]);
		args->vec[v].iov_len = PAGE_SIZE;
	}
	args->vec[v].iov_len = len;
	args->vlen = v+1;
	return args->vec[0].iov_len > 0;
}

int
nfssvc_decode_createargs(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *p, struct nfsd_readlinkargs *args)
{
	if (!(p = decode_fh(p, &args->fh)))
		return 0;
	svc_take_page(rqstp);
	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);

	return xdr_argsize_check(rqstp, p);
}

int
nfssvc_decode_linkargs(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *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;

	svc_take_page(rqstp);
	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);

	return xdr_argsize_check(rqstp, p);
}

/*
 * XDR encode functions
 */
int
nfssvc_encode_void(struct svc_rqst *rqstp, u32 *p, void *dummy)
{
	return xdr_ressize_check(rqstp, p);
}

int
nfssvc_encode_attrstat(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *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_restailpage = 0;
		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, u32 *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_restailpage = 0;
		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, u32 *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, u32 *p,
					struct nfsd_statfsres *resp)
{
	struct kstatfs	*stat = &resp->stats;

	*p++ = htonl(NFSSVC_MAXBLKSIZE);	/* 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);
	u32	*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++ = ~(u32) 0;		/* 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, u32 *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
	21
	22	#ifdef NFSD_OPTIMIZE_SPACE
	23	# define inline
	24	#endif
	25
	26	/*
	27	* Mapping of S_IF* types to NFS file types
	28	*/
	29	static u32 nfs_ftypes[] = {
	30	NFNON, NFCHR, NFCHR, NFBAD,
	31	NFDIR, NFBAD, NFBLK, NFBAD,
	32	NFREG, NFBAD, NFLNK, NFBAD,
	33	NFSOCK, NFBAD, NFLNK, NFBAD,
	34	};
	35
	36
	37	/*
	38	* XDR functions for basic NFS types
	39	*/
858119e1	40	static u32 *
1da177e4 LT	41	decode_fh(u32 p, struct svc_fh fhp)
	42	{
	43	fh_init(fhp, NFS_FHSIZE);
	44	memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
	45	fhp->fh_handle.fh_size = NFS_FHSIZE;
	46
	47	/* FIXME: Look up export pointer here and verify
	48	* Sun Secure RPC if requested */
	49	return p + (NFS_FHSIZE >> 2);
	50	}
	51
a257cdd0 AG	52	/* Helper function for NFSv2 ACL code */
	53	u32 nfs2svc_decode_fh(u32 p, struct svc_fh *fhp)
	54	{
	55	return decode_fh(p, fhp);
	56	}
	57
1da177e4 LT	58	static inline u32 *
	59	encode_fh(u32 p, struct svc_fh fhp)
	60	{
	61	memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
	62	return p + (NFS_FHSIZE>> 2);
	63	}
	64
	65	/*
	66	* Decode a file name and make sure that the path contains
	67	* no slashes or null bytes.
	68	*/
	69	static inline u32 *
	70	decode_filename(u32 p, char namp, int lenp)
	71	{
	72	char *name;
	73	int i;
	74
	75	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
	76	for (i = 0, name = namp; i < lenp; i++, name++) {
	77	if (name == '\0' \|\| name == '/')
	78	return NULL;
	79	}
	80	}
	81
	82	return p;
	83	}
	84
	85	static inline u32 *
	86	decode_pathname(u32 p, char namp, int lenp)
	87	{
	88	char *name;
	89	int i;
	90
	91	if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
	92	for (i = 0, name = namp; i < lenp; i++, name++) {
	93	if (*name == '\0')
	94	return NULL;
	95	}
	96	}
	97
	98	return p;
	99	}
	100
	101	static inline u32 *
	102	decode_sattr(u32 p, struct iattr iap)
	103	{
	104	u32 tmp, tmp1;
	105
	106	iap->ia_valid = 0;
	107
	108	/* Sun client bug compatibility check: some sun clients seem to
	109	* put 0xffff in the mode field when they mean 0xffffffff.
	110	* Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
	111	*/
	112	if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
	113	iap->ia_valid \|= ATTR_MODE;
	114	iap->ia_mode = tmp;
	115	}
	116	if ((tmp = ntohl(*p++)) != (u32)-1) {
	117	iap->ia_valid \|= ATTR_UID;
	118	iap->ia_uid = tmp;
	119	}
	120	if ((tmp = ntohl(*p++)) != (u32)-1) {
	121	iap->ia_valid \|= ATTR_GID;
122	iap->ia_gid = tmp;
123	}
124	if ((tmp = ntohl(*p++)) != (u32)-1) {
125	iap->ia_valid \|= ATTR_SIZE;
126	iap->ia_size = tmp;
127	}
128	tmp = ntohl(p++); tmp1 = ntohl(p++);
129	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
130	iap->ia_valid \|= ATTR_ATIME \| ATTR_ATIME_SET;
131	iap->ia_atime.tv_sec = tmp;
132	iap->ia_atime.tv_nsec = tmp1 * 1000;
133	}
134	tmp = ntohl(p++); tmp1 = ntohl(p++);
135	if (tmp != (u32)-1 && tmp1 != (u32)-1) {
136	iap->ia_valid \|= ATTR_MTIME \| ATTR_MTIME_SET;
137	iap->ia_mtime.tv_sec = tmp;
138	iap->ia_mtime.tv_nsec = tmp1 * 1000;
139	/*
140	* Passing the invalid value useconds=1000000 for mtime
141	* is a Sun convention for "set both mtime and atime to
142	* current server time". It's needed to make permissions
143	* checks for the "touch" program across v2 mounts to
144	* Solaris and Irix boxes work correctly. See description of
145	* sattr in section 6.1 of "NFS Illustrated" by
146	* Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
147	*/
148	if (tmp1 == 1000000)
149	iap->ia_valid &= ~(ATTR_ATIME_SET\|ATTR_MTIME_SET);
150	}
151	return p;
152	}
153
858119e1	154	static u32 *
a334de28 DS	155	encode_fattr(struct svc_rqst rqstp, u32 p, struct svc_fh *fhp,
a334de28 DS	156	struct kstat *stat)
1da177e4	157	{
1da177e4	158	struct dentry *dentry = fhp->fh_dentry;
1da177e4 LT	159	int type;
	160	struct timespec time;
	161
a334de28	162	type = (stat->mode & S_IFMT);
1da177e4 LT	163
1da177e4 LT	164	*p++ = htonl(nfs_ftypes[type >> 12]);
a334de28 DS	165	*p++ = htonl((u32) stat->mode);
	166	*p++ = htonl((u32) stat->nlink);
	167	*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
	168	*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
1da177e4	169
a334de28	170	if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
1da177e4 LT	171	*p++ = htonl(NFS_MAXPATHLEN);
1da177e4 LT	172	} else {
a334de28	173	*p++ = htonl((u32) stat->size);
1da177e4	174	}
a334de28	175	*p++ = htonl((u32) stat->blksize);
1da177e4	176	if (S_ISCHR(type) \|\| S_ISBLK(type))
a334de28	177	*p++ = htonl(new_encode_dev(stat->rdev));
1da177e4 LT	178	else
1da177e4 LT	179	*p++ = htonl(0xffffffff);
a334de28	180	*p++ = htonl((u32) stat->blocks);
1da177e4 LT	181	if (is_fsid(fhp, rqstp->rq_reffh))
	182	*p++ = htonl((u32) fhp->fh_export->ex_fsid);
	183	else
a334de28 DS	184	*p++ = htonl(new_encode_dev(stat->dev));
	185	*p++ = htonl((u32) stat->ino);
	186	*p++ = htonl((u32) stat->atime.tv_sec);
	187	*p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
1da177e4 LT	188	lease_get_mtime(dentry->d_inode, &time);
	189	*p++ = htonl((u32) time.tv_sec);
	190	*p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
a334de28 DS	191	*p++ = htonl((u32) stat->ctime.tv_sec);
a334de28 DS	192	*p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
1da177e4 LT	193
	194	return p;
	195	}
	196
a257cdd0 AG	197	/* Helper function for NFSv2 ACL code */
	198	u32 nfs2svc_encode_fattr(struct svc_rqst rqstp, u32 p, struct svc_fh fhp)
	199	{
a334de28 DS	200	struct kstat stat;
	201	vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
	202	return encode_fattr(rqstp, p, fhp, &stat);
a257cdd0	203	}
1da177e4 LT	204
	205	/*
	206	* XDR decode functions
	207	*/
	208	int
	209	nfssvc_decode_void(struct svc_rqst rqstp, u32 p, void *dummy)
	210	{
	211	return xdr_argsize_check(rqstp, p);
	212	}
	213
	214	int
	215	nfssvc_decode_fhandle(struct svc_rqst rqstp, u32 p, struct nfsd_fhandle *args)
	216	{
	217	if (!(p = decode_fh(p, &args->fh)))
	218	return 0;
	219	return xdr_argsize_check(rqstp, p);
	220	}
	221
	222	int
	223	nfssvc_decode_sattrargs(struct svc_rqst rqstp, u32 p,
	224	struct nfsd_sattrargs *args)
	225	{
	226	if (!(p = decode_fh(p, &args->fh))
	227	\|\| !(p = decode_sattr(p, &args->attrs)))
	228	return 0;
	229
	230	return xdr_argsize_check(rqstp, p);
	231	}
	232
	233	int
	234	nfssvc_decode_diropargs(struct svc_rqst rqstp, u32 p,
	235	struct nfsd_diropargs *args)
	236	{
	237	if (!(p = decode_fh(p, &args->fh))
	238	\|\| !(p = decode_filename(p, &args->name, &args->len)))
	239	return 0;
	240
	241	return xdr_argsize_check(rqstp, p);
	242	}
	243
	244	int
	245	nfssvc_decode_readargs(struct svc_rqst rqstp, u32 p,
	246	struct nfsd_readargs *args)
	247	{
	248	unsigned int len;
	249	int v,pn;
	250	if (!(p = decode_fh(p, &args->fh)))
	251	return 0;
	252
	253	args->offset = ntohl(*p++);
	254	len = args->count = ntohl(*p++);
	255	p++; /* totalcount - unused */
	256
	257	if (len > NFSSVC_MAXBLKSIZE)
	258	len = NFSSVC_MAXBLKSIZE;
	259
	260	/* set up somewhere to store response.
	261	* We take pages, put them on reslist and include in iovec
	262	*/
	263	v=0;
	264	while (len > 0) {
	265	pn=rqstp->rq_resused;
	266	svc_take_page(rqstp);
	267	args->vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
268	args->vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
269	len -= args->vec[v].iov_len;
270	v++;
271	}
272	args->vlen = v;
273	return xdr_argsize_check(rqstp, p);
274	}
275
276	int
277	nfssvc_decode_writeargs(struct svc_rqst rqstp, u32 p,
278	struct nfsd_writeargs *args)
279	{
280	unsigned int len;
281	int v;
282	if (!(p = decode_fh(p, &args->fh)))
283	return 0;
284
285	p++; /* beginoffset */
286	args->offset = ntohl(p++); / offset */
287	p++; /* totalcount */
288	len = args->len = ntohl(*p++);
289	args->vec[0].iov_base = (void*)p;
290	args->vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
291	(((void*)p) - rqstp->rq_arg.head[0].iov_base);
292	if (len > NFSSVC_MAXBLKSIZE)
293	len = NFSSVC_MAXBLKSIZE;
294	v = 0;
295	while (len > args->vec[v].iov_len) {
296	len -= args->vec[v].iov_len;
297	v++;
298	args->vec[v].iov_base = page_address(rqstp->rq_argpages[v]);
299	args->vec[v].iov_len = PAGE_SIZE;
300	}
301	args->vec[v].iov_len = len;
302	args->vlen = v+1;
303	return args->vec[0].iov_len > 0;
304	}
305
306	int
307	nfssvc_decode_createargs(struct svc_rqst rqstp, u32 p,
308	struct nfsd_createargs *args)
309	{
310	if (!(p = decode_fh(p, &args->fh))
311	\|\| !(p = decode_filename(p, &args->name, &args->len))
312	\|\| !(p = decode_sattr(p, &args->attrs)))
313	return 0;
314
315	return xdr_argsize_check(rqstp, p);
316	}
317
318	int
319	nfssvc_decode_renameargs(struct svc_rqst rqstp, u32 p,
320	struct nfsd_renameargs *args)
321	{
322	if (!(p = decode_fh(p, &args->ffh))
323	\|\| !(p = decode_filename(p, &args->fname, &args->flen))
324	\|\| !(p = decode_fh(p, &args->tfh))
325	\|\| !(p = decode_filename(p, &args->tname, &args->tlen)))
326	return 0;
327
328	return xdr_argsize_check(rqstp, p);
329	}
330
331	int
332	nfssvc_decode_readlinkargs(struct svc_rqst rqstp, u32 p, struct nfsd_readlinkargs *args)
333	{
334	if (!(p = decode_fh(p, &args->fh)))
335	return 0;
336	svc_take_page(rqstp);
337	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
338
339	return xdr_argsize_check(rqstp, p);
340	}
341
342	int
343	nfssvc_decode_linkargs(struct svc_rqst rqstp, u32 p,
344	struct nfsd_linkargs *args)
345	{
346	if (!(p = decode_fh(p, &args->ffh))
347	\|\| !(p = decode_fh(p, &args->tfh))
348	\|\| !(p = decode_filename(p, &args->tname, &args->tlen)))
349	return 0;
350
351	return xdr_argsize_check(rqstp, p);
352	}
353
354	int
355	nfssvc_decode_symlinkargs(struct svc_rqst rqstp, u32 p,
356	struct nfsd_symlinkargs *args)
357	{
358	if (!(p = decode_fh(p, &args->ffh))
359	\|\| !(p = decode_filename(p, &args->fname, &args->flen))
360	\|\| !(p = decode_pathname(p, &args->tname, &args->tlen))
361	\|\| !(p = decode_sattr(p, &args->attrs)))
362	return 0;
363
364	return xdr_argsize_check(rqstp, p);
365	}
366
367	int
368	nfssvc_decode_readdirargs(struct svc_rqst rqstp, u32 p,
369	struct nfsd_readdirargs *args)
370	{
371	if (!(p = decode_fh(p, &args->fh)))
372	return 0;
373	args->cookie = ntohl(*p++);
374	args->count = ntohl(*p++);
375	if (args->count > PAGE_SIZE)
376	args->count = PAGE_SIZE;
377
378	svc_take_page(rqstp);
379	args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
380
381	return xdr_argsize_check(rqstp, p);
382	}
383
384	/*
385	* XDR encode functions
386	*/
387	int
388	nfssvc_encode_void(struct svc_rqst rqstp, u32 p, void *dummy)
389	{
390	return xdr_ressize_check(rqstp, p);
391	}
392
393	int
394	nfssvc_encode_attrstat(struct svc_rqst rqstp, u32 p,
395	struct nfsd_attrstat *resp)
396	{
a334de28	397	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	398	return xdr_ressize_check(rqstp, p);
	399	}
	400
	401	int
	402	nfssvc_encode_diropres(struct svc_rqst rqstp, u32 p,
	403	struct nfsd_diropres *resp)
	404	{
	405	p = encode_fh(p, &resp->fh);
a334de28	406	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	407	return xdr_ressize_check(rqstp, p);
	408	}
	409
	410	int
	411	nfssvc_encode_readlinkres(struct svc_rqst rqstp, u32 p,
	412	struct nfsd_readlinkres *resp)
	413	{
	414	*p++ = htonl(resp->len);
	415	xdr_ressize_check(rqstp, p);
	416	rqstp->rq_res.page_len = resp->len;
	417	if (resp->len & 3) {
	418	/* need to pad the tail */
	419	rqstp->rq_restailpage = 0;
	420	rqstp->rq_res.tail[0].iov_base = p;
	421	*p = 0;
	422	rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
	423	}
	424	return 1;
	425	}
	426
	427	int
	428	nfssvc_encode_readres(struct svc_rqst rqstp, u32 p,
	429	struct nfsd_readres *resp)
	430	{
a334de28	431	p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
1da177e4 LT	432	*p++ = htonl(resp->count);
	433	xdr_ressize_check(rqstp, p);
	434
	435	/* now update rqstp->rq_res to reflect data aswell */
	436	rqstp->rq_res.page_len = resp->count;
	437	if (resp->count & 3) {
	438	/* need to pad the tail */
	439	rqstp->rq_restailpage = 0;
	440	rqstp->rq_res.tail[0].iov_base = p;
	441	*p = 0;
	442	rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
	443	}
	444	return 1;
	445	}
	446
	447	int
	448	nfssvc_encode_readdirres(struct svc_rqst rqstp, u32 p,
	449	struct nfsd_readdirres *resp)
	450	{
	451	xdr_ressize_check(rqstp, p);
	452	p = resp->buffer;
	453	p++ = 0; / no more entries */
	454	*p++ = htonl((resp->common.err == nfserr_eof));
	455	rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
	456
	457	return 1;
	458	}
	459
	460	int
	461	nfssvc_encode_statfsres(struct svc_rqst rqstp, u32 p,
	462	struct nfsd_statfsres *resp)
	463	{
	464	struct kstatfs *stat = &resp->stats;
	465
	466	p++ = htonl(NFSSVC_MAXBLKSIZE); / max transfer size */
	467	*p++ = htonl(stat->f_bsize);
	468	*p++ = htonl(stat->f_blocks);
	469	*p++ = htonl(stat->f_bfree);
	470	*p++ = htonl(stat->f_bavail);
	471	return xdr_ressize_check(rqstp, p);
	472	}
	473
	474	int
	475	nfssvc_encode_entry(struct readdir_cd ccd, const char name,
	476	int namlen, loff_t offset, ino_t ino, unsigned int d_type)
	477	{
	478	struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
	479	u32 *p = cd->buffer;
	480	int buflen, slen;
	481
	482	/*
	483	dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
	484	namlen, name, offset, ino);
	485	*/
	486
	487	if (offset > ~((u32) 0)) {
	488	cd->common.err = nfserr_fbig;
	489	return -EINVAL;
	490	}
	491	if (cd->offset)
	492	*cd->offset = htonl(offset);
	493	if (namlen > NFS2_MAXNAMLEN)
	494	namlen = NFS2_MAXNAMLEN;/* truncate filename */
	495
496	slen = XDR_QUADLEN(namlen);
497	if ((buflen = cd->buflen - slen - 4) < 0) {
498	cd->common.err = nfserr_toosmall;
499	return -EINVAL;
500	}
501	p++ = xdr_one; / mark entry present */
502	p++ = htonl((u32) ino); / file id */
503	p = xdr_encode_array(p, name, namlen);/* name length & name */
504	cd->offset = p; /* remember pointer */
505	p++ = ~(u32) 0; / offset of next entry */
506
507	cd->buflen = buflen;
508	cd->buffer = p;
509	cd->common.err = nfs_ok;
510	return 0;
511	}
512
513	/*
514	* XDR release functions
515	*/
516	int
517	nfssvc_release_fhandle(struct svc_rqst rqstp, u32 p,
518	struct nfsd_fhandle *resp)
519	{
520	fh_put(&resp->fh);
521	return 1;
522	}