nfs4xdr.c 103.9 KB
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/*
 *  Server-side XDR for NFSv4
 *
 *  Copyright (c) 2002 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  Kendrick Smith <kmsmith@umich.edu>
 *  Andy Adamson   <andros@umich.edu>
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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#include <linux/slab.h>
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#include <linux/namei.h>
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#include <linux/statfs.h>
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#include <linux/utsname.h>
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#include <linux/pagemap.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#include "idmap.h"
#include "acl.h"
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#include "xdr4.h"
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#include "vfs.h"
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#include "state.h"
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#include "cache.h"
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#include "netns.h"
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#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
#endif


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#define NFSDDBG_FACILITY		NFSDDBG_XDR

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/*
 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
 * directory in order to indicate to the client that a filesystem boundary is present
 * We use a fixed fsid for a referral
 */
#define NFS4_REFERRAL_FSID_MAJOR	0x8000000ULL
#define NFS4_REFERRAL_FSID_MINOR	0x8000000ULL

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static __be32
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check_filename(char *str, int len)
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{
	int i;

	if (len == 0)
		return nfserr_inval;
	if (isdotent(str, len))
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		return nfserr_badname;
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	for (i = 0; i < len; i++)
		if (str[i] == '/')
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			return nfserr_badname;
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	return 0;
}

#define DECODE_HEAD				\
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	__be32 *p;				\
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	__be32 status
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#define DECODE_TAIL				\
	status = 0;				\
out:						\
	return status;				\
xdr_error:					\
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	dprintk("NFSD: xdr error (%s:%d)\n",	\
			__FILE__, __LINE__);	\
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	status = nfserr_bad_xdr;		\
	goto out

#define READMEM(x,nbytes) do {			\
	x = (char *)p;				\
	p += XDR_QUADLEN(nbytes);		\
} while (0)
#define SAVEMEM(x,nbytes) do {			\
	if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
 		savemem(argp, p, nbytes) :	\
 		(char *)p)) {			\
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		dprintk("NFSD: xdr error (%s:%d)\n", \
				__FILE__, __LINE__); \
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		goto xdr_error;			\
		}				\
	p += XDR_QUADLEN(nbytes);		\
} while (0)
#define COPYMEM(x,nbytes) do {			\
	memcpy((x), p, nbytes);			\
	p += XDR_QUADLEN(nbytes);		\
} while (0)

/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
#define READ_BUF(nbytes)  do {			\
	if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) {	\
		p = argp->p;			\
		argp->p += XDR_QUADLEN(nbytes);	\
	} else if (!(p = read_buf(argp, nbytes))) { \
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		dprintk("NFSD: xdr error (%s:%d)\n", \
				__FILE__, __LINE__); \
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		goto xdr_error;			\
	}					\
} while (0)

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static void next_decode_page(struct nfsd4_compoundargs *argp)
{
	argp->p = page_address(argp->pagelist[0]);
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	argp->pagelist++;
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	if (argp->pagelen < PAGE_SIZE) {
		argp->end = argp->p + (argp->pagelen>>2);
		argp->pagelen = 0;
	} else {
		argp->end = argp->p + (PAGE_SIZE>>2);
		argp->pagelen -= PAGE_SIZE;
	}
}

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static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
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{
	/* We want more bytes than seem to be available.
	 * Maybe we need a new page, maybe we have just run out
	 */
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	unsigned int avail = (char *)argp->end - (char *)argp->p;
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	__be32 *p;
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	if (avail + argp->pagelen < nbytes)
		return NULL;
	if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
		return NULL;
	/* ok, we can do it with the current plus the next page */
	if (nbytes <= sizeof(argp->tmp))
		p = argp->tmp;
	else {
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		kfree(argp->tmpp);
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		p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
		if (!p)
			return NULL;
		
	}
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	/*
	 * The following memcpy is safe because read_buf is always
	 * called with nbytes > avail, and the two cases above both
	 * guarantee p points to at least nbytes bytes.
	 */
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	memcpy(p, argp->p, avail);
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	next_decode_page(argp);
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	memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
	argp->p += XDR_QUADLEN(nbytes - avail);
	return p;
}

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static int zero_clientid(clientid_t *clid)
{
	return (clid->cl_boot == 0) && (clid->cl_id == 0);
}

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/**
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 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
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 * @argp: NFSv4 compound argument structure
 * @p: pointer to be freed (with kfree())
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 *
 * Marks @p to be freed when processing the compound operation
 * described in @argp finishes.
 */
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static void *
svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
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{
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	struct svcxdr_tmpbuf *tb;
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	tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
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	if (!tb)
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		return NULL;
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	tb->next = argp->to_free;
	argp->to_free = tb;
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	return tb->buf;
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}

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/*
 * For xdr strings that need to be passed to other kernel api's
 * as null-terminated strings.
 *
 * Note null-terminating in place usually isn't safe since the
 * buffer might end on a page boundary.
 */
static char *
svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
{
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	char *p = svcxdr_tmpalloc(argp, len + 1);
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	if (!p)
		return NULL;
	memcpy(p, buf, len);
	p[len] = '\0';
	return p;
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}

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/**
 * savemem - duplicate a chunk of memory for later processing
 * @argp: NFSv4 compound argument structure to be freed with
 * @p: pointer to be duplicated
 * @nbytes: length to be duplicated
 *
 * Returns a pointer to a copy of @nbytes bytes of memory at @p
 * that are preserved until processing of the NFSv4 compound
 * operation described by @argp finishes.
 */
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static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
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{
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	void *ret;

	ret = svcxdr_tmpalloc(argp, nbytes);
	if (!ret)
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		return NULL;
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	memcpy(ret, p, nbytes);
	return ret;
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}

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static __be32
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nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
{
	u32 bmlen;
	DECODE_HEAD;

	bmval[0] = 0;
	bmval[1] = 0;
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	bmval[2] = 0;
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	READ_BUF(4);
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	bmlen = be32_to_cpup(p++);
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	if (bmlen > 1000)
		goto xdr_error;

	READ_BUF(bmlen << 2);
	if (bmlen > 0)
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		bmval[0] = be32_to_cpup(p++);
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	if (bmlen > 1)
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		bmval[1] = be32_to_cpup(p++);
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	if (bmlen > 2)
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		bmval[2] = be32_to_cpup(p++);
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	DECODE_TAIL;
}

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static __be32
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nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
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		   struct iattr *iattr, struct nfs4_acl **acl,
		   struct xdr_netobj *label)
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{
	int expected_len, len = 0;
	u32 dummy32;
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	u64 sec;
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	char *buf;

	DECODE_HEAD;
	iattr->ia_valid = 0;
	if ((status = nfsd4_decode_bitmap(argp, bmval)))
		return status;

	READ_BUF(4);
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	expected_len = be32_to_cpup(p++);
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	if (bmval[0] & FATTR4_WORD0_SIZE) {
		READ_BUF(8);
		len += 8;
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		p = xdr_decode_hyper(p, &iattr->ia_size);
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		iattr->ia_valid |= ATTR_SIZE;
	}
	if (bmval[0] & FATTR4_WORD0_ACL) {
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		u32 nace;
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		struct nfs4_ace *ace;
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		READ_BUF(4); len += 4;
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		nace = be32_to_cpup(p++);
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		if (nace > NFS4_ACL_MAX)
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			return nfserr_fbig;
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		*acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
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		if (*acl == NULL)
			return nfserr_jukebox;

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		(*acl)->naces = nace;
		for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
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			READ_BUF(16); len += 16;
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			ace->type = be32_to_cpup(p++);
			ace->flag = be32_to_cpup(p++);
			ace->access_mask = be32_to_cpup(p++);
			dummy32 = be32_to_cpup(p++);
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			READ_BUF(dummy32);
			len += XDR_QUADLEN(dummy32) << 2;
			READMEM(buf, dummy32);
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			ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
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			status = nfs_ok;
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			if (ace->whotype != NFS4_ACL_WHO_NAMED)
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				;
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			else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
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				status = nfsd_map_name_to_gid(argp->rqstp,
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						buf, dummy32, &ace->who_gid);
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			else
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				status = nfsd_map_name_to_uid(argp->rqstp,
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						buf, dummy32, &ace->who_uid);
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			if (status)
				return status;
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		}
	} else
		*acl = NULL;
	if (bmval[1] & FATTR4_WORD1_MODE) {
		READ_BUF(4);
		len += 4;
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		iattr->ia_mode = be32_to_cpup(p++);
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		iattr->ia_mode &= (S_IFMT | S_IALLUGO);
		iattr->ia_valid |= ATTR_MODE;
	}
	if (bmval[1] & FATTR4_WORD1_OWNER) {
		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++);
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		READ_BUF(dummy32);
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
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		if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
			return status;
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		iattr->ia_valid |= ATTR_UID;
	}
	if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++);
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		READ_BUF(dummy32);
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
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		if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
			return status;
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		iattr->ia_valid |= ATTR_GID;
	}
	if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++);
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		switch (dummy32) {
		case NFS4_SET_TO_CLIENT_TIME:
			/* We require the high 32 bits of 'seconds' to be 0, and we ignore
			   all 32 bits of 'nseconds'. */
			READ_BUF(12);
			len += 12;
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			p = xdr_decode_hyper(p, &sec);
			iattr->ia_atime.tv_sec = (time_t)sec;
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			iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
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			if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
				return nfserr_inval;
			iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
			break;
		case NFS4_SET_TO_SERVER_TIME:
			iattr->ia_valid |= ATTR_ATIME;
			break;
		default:
			goto xdr_error;
		}
	}
	if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++);
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		switch (dummy32) {
		case NFS4_SET_TO_CLIENT_TIME:
			/* We require the high 32 bits of 'seconds' to be 0, and we ignore
			   all 32 bits of 'nseconds'. */
			READ_BUF(12);
			len += 12;
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			p = xdr_decode_hyper(p, &sec);
			iattr->ia_mtime.tv_sec = sec;
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			iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
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			if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
				return nfserr_inval;
			iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
			break;
		case NFS4_SET_TO_SERVER_TIME:
			iattr->ia_valid |= ATTR_MTIME;
			break;
		default:
			goto xdr_error;
		}
	}
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	label->len = 0;
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
	if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
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		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
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		READ_BUF(4);
		len += 4;
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		dummy32 = be32_to_cpup(p++);
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		READ_BUF(dummy32);
		if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
			return nfserr_badlabel;
		len += (XDR_QUADLEN(dummy32) << 2);
		READMEM(buf, dummy32);
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		label->len = dummy32;
		label->data = svcxdr_dupstr(argp, buf, dummy32);
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		if (!label->data)
			return nfserr_jukebox;
	}
#endif

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	if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
	    || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
	    || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
		READ_BUF(expected_len - len);
	else if (len != expected_len)
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		goto xdr_error;

	DECODE_TAIL;
}

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static __be32
nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(stateid_t));
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	sid->si_generation = be32_to_cpup(p++);
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	COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));

	DECODE_TAIL;
}

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static __be32
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nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
{
	DECODE_HEAD;

	READ_BUF(4);
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	access->ac_req_access = be32_to_cpup(p++);
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	DECODE_TAIL;
}

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static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
{
	DECODE_HEAD;
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	u32 dummy, uid, gid;
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	char *machine_name;
	int i;
	int nr_secflavs;

	/* callback_sec_params4 */
	READ_BUF(4);
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	nr_secflavs = be32_to_cpup(p++);
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	if (nr_secflavs)
		cbs->flavor = (u32)(-1);
	else
		/* Is this legal? Be generous, take it to mean AUTH_NONE: */
		cbs->flavor = 0;
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	for (i = 0; i < nr_secflavs; ++i) {
		READ_BUF(4);
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		dummy = be32_to_cpup(p++);
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		switch (dummy) {
		case RPC_AUTH_NULL:
			/* Nothing to read */
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			if (cbs->flavor == (u32)(-1))
				cbs->flavor = RPC_AUTH_NULL;
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			break;
		case RPC_AUTH_UNIX:
			READ_BUF(8);
			/* stamp */
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			dummy = be32_to_cpup(p++);
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			/* machine name */
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			dummy = be32_to_cpup(p++);
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			READ_BUF(dummy);
			SAVEMEM(machine_name, dummy);

			/* uid, gid */
			READ_BUF(8);
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			uid = be32_to_cpup(p++);
			gid = be32_to_cpup(p++);
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			/* more gids */
			READ_BUF(4);
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			dummy = be32_to_cpup(p++);
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			READ_BUF(dummy * 4);
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			if (cbs->flavor == (u32)(-1)) {
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				kuid_t kuid = make_kuid(&init_user_ns, uid);
				kgid_t kgid = make_kgid(&init_user_ns, gid);
				if (uid_valid(kuid) && gid_valid(kgid)) {
					cbs->uid = kuid;
					cbs->gid = kgid;
					cbs->flavor = RPC_AUTH_UNIX;
				} else {
					dprintk("RPC_AUTH_UNIX with invalid"
						"uid or gid ignoring!\n");
				}
516
			}
517 518 519 520 521 522
			break;
		case RPC_AUTH_GSS:
			dprintk("RPC_AUTH_GSS callback secflavor "
				"not supported!\n");
			READ_BUF(8);
			/* gcbp_service */
J
J. Bruce Fields 已提交
523
			dummy = be32_to_cpup(p++);
524
			/* gcbp_handle_from_server */
J
J. Bruce Fields 已提交
525
			dummy = be32_to_cpup(p++);
526 527 528 529
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
			/* gcbp_handle_from_client */
			READ_BUF(4);
J
J. Bruce Fields 已提交
530
			dummy = be32_to_cpup(p++);
531 532 533 534 535 536 537 538 539 540
			READ_BUF(dummy);
			break;
		default:
			dprintk("Illegal callback secflavor\n");
			return nfserr_inval;
		}
	}
	DECODE_TAIL;
}

541 542 543 544 545
static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
546
	bc->bc_cb_program = be32_to_cpup(p++);
547 548 549 550 551
	nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);

	DECODE_TAIL;
}

552 553 554 555 556 557
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
{
	DECODE_HEAD;

	READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
	COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J
J. Bruce Fields 已提交
558
	bcts->dir = be32_to_cpup(p++);
559 560
	/* XXX: skipping ctsa_use_conn_in_rdma_mode.  Perhaps Tom Tucker
	 * could help us figure out we should be using it. */
561 562 563
	DECODE_TAIL;
}

564
static __be32
L
Linus Torvalds 已提交
565 566 567 568
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
	DECODE_HEAD;

569
	READ_BUF(4);
J
J. Bruce Fields 已提交
570
	close->cl_seqid = be32_to_cpup(p++);
571
	return nfsd4_decode_stateid(argp, &close->cl_stateid);
L
Linus Torvalds 已提交
572 573 574 575 576

	DECODE_TAIL;
}


577
static __be32
L
Linus Torvalds 已提交
578 579 580 581 582
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
{
	DECODE_HEAD;

	READ_BUF(12);
J
J. Bruce Fields 已提交
583
	p = xdr_decode_hyper(p, &commit->co_offset);
J
J. Bruce Fields 已提交
584
	commit->co_count = be32_to_cpup(p++);
L
Linus Torvalds 已提交
585 586 587 588

	DECODE_TAIL;
}

589
static __be32
L
Linus Torvalds 已提交
590 591 592 593 594
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
595
	create->cr_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
596 597 598
	switch (create->cr_type) {
	case NF4LNK:
		READ_BUF(4);
599 600
		create->cr_datalen = be32_to_cpup(p++);
		READ_BUF(create->cr_datalen);
601
		create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
602
		if (!create->cr_data)
603
			return nfserr_jukebox;
L
Linus Torvalds 已提交
604 605 606 607
		break;
	case NF4BLK:
	case NF4CHR:
		READ_BUF(8);
J
J. Bruce Fields 已提交
608 609
		create->cr_specdata1 = be32_to_cpup(p++);
		create->cr_specdata2 = be32_to_cpup(p++);
L
Linus Torvalds 已提交
610 611 612 613 614 615 616 617 618
		break;
	case NF4SOCK:
	case NF4FIFO:
	case NF4DIR:
	default:
		break;
	}

	READ_BUF(4);
J
J. Bruce Fields 已提交
619
	create->cr_namelen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
620 621
	READ_BUF(create->cr_namelen);
	SAVEMEM(create->cr_name, create->cr_namelen);
622
	if ((status = check_filename(create->cr_name, create->cr_namelen)))
L
Linus Torvalds 已提交
623 624
		return status;

625
	status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
626
				    &create->cr_acl, &create->cr_label);
627
	if (status)
L
Linus Torvalds 已提交
628 629 630 631 632
		goto out;

	DECODE_TAIL;
}

633
static inline __be32
L
Linus Torvalds 已提交
634 635
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
{
636
	return nfsd4_decode_stateid(argp, &dr->dr_stateid);
L
Linus Torvalds 已提交
637 638
}

639
static inline __be32
L
Linus Torvalds 已提交
640 641 642 643 644
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
{
	return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
}

645
static __be32
L
Linus Torvalds 已提交
646 647 648 649 650
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
651
	link->li_namelen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
652 653
	READ_BUF(link->li_namelen);
	SAVEMEM(link->li_name, link->li_namelen);
654
	if ((status = check_filename(link->li_name, link->li_namelen)))
L
Linus Torvalds 已提交
655 656 657 658 659
		return status;

	DECODE_TAIL;
}

660
static __be32
L
Linus Torvalds 已提交
661 662 663 664 665 666 667 668
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
{
	DECODE_HEAD;

	/*
	* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
	*/
	READ_BUF(28);
J
J. Bruce Fields 已提交
669
	lock->lk_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
670 671
	if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
		goto xdr_error;
J
J. Bruce Fields 已提交
672
	lock->lk_reclaim = be32_to_cpup(p++);
J
J. Bruce Fields 已提交
673 674
	p = xdr_decode_hyper(p, &lock->lk_offset);
	p = xdr_decode_hyper(p, &lock->lk_length);
J
J. Bruce Fields 已提交
675
	lock->lk_is_new = be32_to_cpup(p++);
L
Linus Torvalds 已提交
676 677

	if (lock->lk_is_new) {
678
		READ_BUF(4);
J
J. Bruce Fields 已提交
679
		lock->lk_new_open_seqid = be32_to_cpup(p++);
680 681 682 683
		status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
		if (status)
			return status;
		READ_BUF(8 + sizeof(clientid_t));
J
J. Bruce Fields 已提交
684
		lock->lk_new_lock_seqid = be32_to_cpup(p++);
L
Linus Torvalds 已提交
685
		COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
J
J. Bruce Fields 已提交
686
		lock->lk_new_owner.len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
687 688 689
		READ_BUF(lock->lk_new_owner.len);
		READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
	} else {
690 691 692 693
		status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
		if (status)
			return status;
		READ_BUF(4);
J
J. Bruce Fields 已提交
694
		lock->lk_old_lock_seqid = be32_to_cpup(p++);
L
Linus Torvalds 已提交
695 696 697 698 699
	}

	DECODE_TAIL;
}

700
static __be32
L
Linus Torvalds 已提交
701 702 703 704 705
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
{
	DECODE_HEAD;
		        
	READ_BUF(32);
J
J. Bruce Fields 已提交
706
	lockt->lt_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
707 708
	if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
		goto xdr_error;
J
J. Bruce Fields 已提交
709 710
	p = xdr_decode_hyper(p, &lockt->lt_offset);
	p = xdr_decode_hyper(p, &lockt->lt_length);
L
Linus Torvalds 已提交
711
	COPYMEM(&lockt->lt_clientid, 8);
J
J. Bruce Fields 已提交
712
	lockt->lt_owner.len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
713 714 715 716 717 718
	READ_BUF(lockt->lt_owner.len);
	READMEM(lockt->lt_owner.data, lockt->lt_owner.len);

	DECODE_TAIL;
}

719
static __be32
L
Linus Torvalds 已提交
720 721 722 723
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
	DECODE_HEAD;

724
	READ_BUF(8);
J
J. Bruce Fields 已提交
725
	locku->lu_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
726 727
	if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
		goto xdr_error;
J
J. Bruce Fields 已提交
728
	locku->lu_seqid = be32_to_cpup(p++);
729 730 731 732
	status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
	if (status)
		return status;
	READ_BUF(16);
J
J. Bruce Fields 已提交
733 734
	p = xdr_decode_hyper(p, &locku->lu_offset);
	p = xdr_decode_hyper(p, &locku->lu_length);
L
Linus Torvalds 已提交
735 736 737 738

	DECODE_TAIL;
}

739
static __be32
L
Linus Torvalds 已提交
740 741 742 743 744
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
745
	lookup->lo_len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
746 747
	READ_BUF(lookup->lo_len);
	SAVEMEM(lookup->lo_name, lookup->lo_len);
748
	if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
L
Linus Torvalds 已提交
749 750 751 752 753
		return status;

	DECODE_TAIL;
}

754
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
755 756 757 758 759
{
	__be32 *p;
	u32 w;

	READ_BUF(4);
J
J. Bruce Fields 已提交
760
	w = be32_to_cpup(p++);
761 762 763 764 765
	*share_access = w & NFS4_SHARE_ACCESS_MASK;
	*deleg_want = w & NFS4_SHARE_WANT_MASK;
	if (deleg_when)
		*deleg_when = w & NFS4_SHARE_WHEN_MASK;

766 767 768 769 770 771 772 773
	switch (w & NFS4_SHARE_ACCESS_MASK) {
	case NFS4_SHARE_ACCESS_READ:
	case NFS4_SHARE_ACCESS_WRITE:
	case NFS4_SHARE_ACCESS_BOTH:
		break;
	default:
		return nfserr_bad_xdr;
	}
774
	w &= ~NFS4_SHARE_ACCESS_MASK;
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
	if (!w)
		return nfs_ok;
	if (!argp->minorversion)
		return nfserr_bad_xdr;
	switch (w & NFS4_SHARE_WANT_MASK) {
	case NFS4_SHARE_WANT_NO_PREFERENCE:
	case NFS4_SHARE_WANT_READ_DELEG:
	case NFS4_SHARE_WANT_WRITE_DELEG:
	case NFS4_SHARE_WANT_ANY_DELEG:
	case NFS4_SHARE_WANT_NO_DELEG:
	case NFS4_SHARE_WANT_CANCEL:
		break;
	default:
		return nfserr_bad_xdr;
	}
790
	w &= ~NFS4_SHARE_WANT_MASK;
791 792
	if (!w)
		return nfs_ok;
793 794 795

	if (!deleg_when)	/* open_downgrade */
		return nfserr_inval;
796 797 798
	switch (w) {
	case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
	case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
799 800
	case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
	      NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
801 802 803 804 805 806 807 808 809 810 811
		return nfs_ok;
	}
xdr_error:
	return nfserr_bad_xdr;
}

static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
{
	__be32 *p;

	READ_BUF(4);
J
J. Bruce Fields 已提交
812
	*x = be32_to_cpup(p++);
813
	/* Note: unlinke access bits, deny bits may be zero. */
814
	if (*x & ~NFS4_SHARE_DENY_BOTH)
815 816 817 818 819 820
		return nfserr_bad_xdr;
	return nfs_ok;
xdr_error:
	return nfserr_bad_xdr;
}

821 822 823 824 825
static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
{
	__be32 *p;

	READ_BUF(4);
J
J. Bruce Fields 已提交
826
	o->len = be32_to_cpup(p++);
827 828 829 830 831 832 833 834 835 836 837

	if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
		return nfserr_bad_xdr;

	READ_BUF(o->len);
	SAVEMEM(o->data, o->len);
	return nfs_ok;
xdr_error:
	return nfserr_bad_xdr;
}

838
static __be32
L
Linus Torvalds 已提交
839 840 841
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
	DECODE_HEAD;
842
	u32 dummy;
L
Linus Torvalds 已提交
843 844 845

	memset(open->op_bmval, 0, sizeof(open->op_bmval));
	open->op_iattr.ia_valid = 0;
846
	open->op_openowner = NULL;
L
Linus Torvalds 已提交
847

848
	open->op_xdr_error = 0;
L
Linus Torvalds 已提交
849
	/* seqid, share_access, share_deny, clientid, ownerlen */
850
	READ_BUF(4);
J
J. Bruce Fields 已提交
851
	open->op_seqid = be32_to_cpup(p++);
852 853 854
	/* decode, yet ignore deleg_when until supported */
	status = nfsd4_decode_share_access(argp, &open->op_share_access,
					   &open->op_deleg_want, &dummy);
855 856 857 858 859
	if (status)
		goto xdr_error;
	status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
	if (status)
		goto xdr_error;
860
	READ_BUF(sizeof(clientid_t));
L
Linus Torvalds 已提交
861
	COPYMEM(&open->op_clientid, sizeof(clientid_t));
862 863 864 865
	status = nfsd4_decode_opaque(argp, &open->op_owner);
	if (status)
		goto xdr_error;
	READ_BUF(4);
J
J. Bruce Fields 已提交
866
	open->op_create = be32_to_cpup(p++);
L
Linus Torvalds 已提交
867 868 869 870 871
	switch (open->op_create) {
	case NFS4_OPEN_NOCREATE:
		break;
	case NFS4_OPEN_CREATE:
		READ_BUF(4);
J
J. Bruce Fields 已提交
872
		open->op_createmode = be32_to_cpup(p++);
L
Linus Torvalds 已提交
873 874 875
		switch (open->op_createmode) {
		case NFS4_CREATE_UNCHECKED:
		case NFS4_CREATE_GUARDED:
876
			status = nfsd4_decode_fattr(argp, open->op_bmval,
877
				&open->op_iattr, &open->op_acl, &open->op_label);
878
			if (status)
L
Linus Torvalds 已提交
879 880 881
				goto out;
			break;
		case NFS4_CREATE_EXCLUSIVE:
882 883
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
884
			break;
B
Benny Halevy 已提交
885 886 887
		case NFS4_CREATE_EXCLUSIVE4_1:
			if (argp->minorversion < 1)
				goto xdr_error;
888 889
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
890
			status = nfsd4_decode_fattr(argp, open->op_bmval,
891
				&open->op_iattr, &open->op_acl, &open->op_label);
B
Benny Halevy 已提交
892 893 894
			if (status)
				goto out;
			break;
L
Linus Torvalds 已提交
895 896 897 898 899 900 901 902 903 904
		default:
			goto xdr_error;
		}
		break;
	default:
		goto xdr_error;
	}

	/* open_claim */
	READ_BUF(4);
J
J. Bruce Fields 已提交
905
	open->op_claim_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
906 907 908 909
	switch (open->op_claim_type) {
	case NFS4_OPEN_CLAIM_NULL:
	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
		READ_BUF(4);
J
J. Bruce Fields 已提交
910
		open->op_fname.len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
911 912
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
913
		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
L
Linus Torvalds 已提交
914 915 916 917
			return status;
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		READ_BUF(4);
J
J. Bruce Fields 已提交
918
		open->op_delegate_type = be32_to_cpup(p++);
L
Linus Torvalds 已提交
919 920
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
921 922 923 924
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		READ_BUF(4);
J
J. Bruce Fields 已提交
925
		open->op_fname.len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
926 927
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
928
		if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
L
Linus Torvalds 已提交
929 930
			return status;
		break;
931 932 933 934 935 936 937 938 939 940 941 942 943
	case NFS4_OPEN_CLAIM_FH:
	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
		if (argp->minorversion < 1)
			goto xdr_error;
		/* void */
		break;
	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
		if (argp->minorversion < 1)
			goto xdr_error;
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		break;
L
Linus Torvalds 已提交
944 945 946 947 948 949 950
	default:
		goto xdr_error;
	}

	DECODE_TAIL;
}

951
static __be32
L
Linus Torvalds 已提交
952 953 954
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
	DECODE_HEAD;
955 956 957 958

	if (argp->minorversion >= 1)
		return nfserr_notsupp;

959 960 961 962
	status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
	if (status)
		return status;
	READ_BUF(4);
J
J. Bruce Fields 已提交
963
	open_conf->oc_seqid = be32_to_cpup(p++);
964

L
Linus Torvalds 已提交
965 966 967
	DECODE_TAIL;
}

968
static __be32
L
Linus Torvalds 已提交
969 970 971 972
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
	DECODE_HEAD;
		    
973 974 975
	status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
	if (status)
		return status;
976
	READ_BUF(4);
J
J. Bruce Fields 已提交
977
	open_down->od_seqid = be32_to_cpup(p++);
978 979
	status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
					   &open_down->od_deleg_want, NULL);
980 981 982 983 984
	if (status)
		return status;
	status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
	if (status)
		return status;
L
Linus Torvalds 已提交
985 986 987
	DECODE_TAIL;
}

988
static __be32
L
Linus Torvalds 已提交
989 990 991 992 993
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
994
	putfh->pf_fhlen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
995 996 997 998 999 1000 1001 1002
	if (putfh->pf_fhlen > NFS4_FHSIZE)
		goto xdr_error;
	READ_BUF(putfh->pf_fhlen);
	SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);

	DECODE_TAIL;
}

1003 1004 1005 1006 1007 1008 1009 1010
static __be32
nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
{
	if (argp->minorversion == 0)
		return nfs_ok;
	return nfserr_notsupp;
}

1011
static __be32
L
Linus Torvalds 已提交
1012 1013 1014 1015
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
	DECODE_HEAD;

1016 1017 1018 1019
	status = nfsd4_decode_stateid(argp, &read->rd_stateid);
	if (status)
		return status;
	READ_BUF(12);
J
J. Bruce Fields 已提交
1020
	p = xdr_decode_hyper(p, &read->rd_offset);
J
J. Bruce Fields 已提交
1021
	read->rd_length = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1022 1023 1024 1025

	DECODE_TAIL;
}

1026
static __be32
L
Linus Torvalds 已提交
1027 1028 1029 1030 1031
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
{
	DECODE_HEAD;

	READ_BUF(24);
J
J. Bruce Fields 已提交
1032
	p = xdr_decode_hyper(p, &readdir->rd_cookie);
L
Linus Torvalds 已提交
1033
	COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
J
J. Bruce Fields 已提交
1034 1035
	readdir->rd_dircount = be32_to_cpup(p++);
	readdir->rd_maxcount = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1036 1037 1038 1039 1040 1041
	if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
		goto out;

	DECODE_TAIL;
}

1042
static __be32
L
Linus Torvalds 已提交
1043 1044 1045 1046 1047
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1048
	remove->rm_namelen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1049 1050
	READ_BUF(remove->rm_namelen);
	SAVEMEM(remove->rm_name, remove->rm_namelen);
1051
	if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
L
Linus Torvalds 已提交
1052 1053 1054 1055 1056
		return status;

	DECODE_TAIL;
}

1057
static __be32
L
Linus Torvalds 已提交
1058 1059 1060 1061 1062
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1063
	rename->rn_snamelen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1064 1065
	READ_BUF(rename->rn_snamelen + 4);
	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
J
J. Bruce Fields 已提交
1066
	rename->rn_tnamelen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1067 1068
	READ_BUF(rename->rn_tnamelen);
	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1069
	if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
L
Linus Torvalds 已提交
1070
		return status;
1071
	if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
L
Linus Torvalds 已提交
1072 1073 1074 1075 1076
		return status;

	DECODE_TAIL;
}

1077
static __be32
L
Linus Torvalds 已提交
1078 1079 1080 1081
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
	DECODE_HEAD;

1082 1083 1084
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

L
Linus Torvalds 已提交
1085 1086 1087 1088 1089 1090
	READ_BUF(sizeof(clientid_t));
	COPYMEM(clientid, sizeof(clientid_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1091 1092 1093 1094 1095 1096 1097
static __be32
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo *secinfo)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1098
	secinfo->si_namelen = be32_to_cpup(p++);
A
Andy Adamson 已提交
1099 1100
	READ_BUF(secinfo->si_namelen);
	SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1101
	status = check_filename(secinfo->si_name, secinfo->si_namelen);
A
Andy Adamson 已提交
1102 1103 1104 1105 1106
	if (status)
		return status;
	DECODE_TAIL;
}

J
J. Bruce Fields 已提交
1107 1108 1109 1110 1111 1112 1113
static __be32
nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo_no_name *sin)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1114
	sin->sin_style = be32_to_cpup(p++);
J
J. Bruce Fields 已提交
1115 1116 1117
	DECODE_TAIL;
}

1118
static __be32
L
Linus Torvalds 已提交
1119 1120
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
1121
	__be32 status;
L
Linus Torvalds 已提交
1122

1123 1124 1125
	status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
	if (status)
		return status;
1126
	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1127
				  &setattr->sa_acl, &setattr->sa_label);
L
Linus Torvalds 已提交
1128 1129
}

1130
static __be32
L
Linus Torvalds 已提交
1131 1132 1133 1134
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
{
	DECODE_HEAD;

1135 1136 1137
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

1138 1139
	READ_BUF(NFS4_VERIFIER_SIZE);
	COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1140

1141 1142 1143 1144
	status = nfsd4_decode_opaque(argp, &setclientid->se_name);
	if (status)
		return nfserr_bad_xdr;
	READ_BUF(8);
J
J. Bruce Fields 已提交
1145 1146
	setclientid->se_callback_prog = be32_to_cpup(p++);
	setclientid->se_callback_netid_len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1147 1148 1149

	READ_BUF(setclientid->se_callback_netid_len + 4);
	SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
J
J. Bruce Fields 已提交
1150
	setclientid->se_callback_addr_len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1151 1152 1153

	READ_BUF(setclientid->se_callback_addr_len + 4);
	SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
J
J. Bruce Fields 已提交
1154
	setclientid->se_callback_ident = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1155 1156 1157 1158

	DECODE_TAIL;
}

1159
static __be32
L
Linus Torvalds 已提交
1160 1161 1162 1163
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
{
	DECODE_HEAD;

1164 1165 1166
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

1167
	READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1168
	COPYMEM(&scd_c->sc_clientid, 8);
1169
	COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1170 1171 1172 1173 1174

	DECODE_TAIL;
}

/* Also used for NVERIFY */
1175
static __be32
L
Linus Torvalds 已提交
1176 1177 1178 1179 1180 1181 1182 1183
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
{
	DECODE_HEAD;

	if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
		goto out;

	/* For convenience's sake, we compare raw xdr'd attributes in
1184 1185
	 * nfsd4_proc_verify */

L
Linus Torvalds 已提交
1186
	READ_BUF(4);
J
J. Bruce Fields 已提交
1187
	verify->ve_attrlen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1188 1189 1190 1191 1192 1193
	READ_BUF(verify->ve_attrlen);
	SAVEMEM(verify->ve_attrval, verify->ve_attrlen);

	DECODE_TAIL;
}

1194
static __be32
L
Linus Torvalds 已提交
1195 1196 1197 1198 1199 1200
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
	int avail;
	int len;
	DECODE_HEAD;

1201 1202 1203 1204
	status = nfsd4_decode_stateid(argp, &write->wr_stateid);
	if (status)
		return status;
	READ_BUF(16);
J
J. Bruce Fields 已提交
1205
	p = xdr_decode_hyper(p, &write->wr_offset);
J
J. Bruce Fields 已提交
1206
	write->wr_stable_how = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1207 1208
	if (write->wr_stable_how > 2)
		goto xdr_error;
J
J. Bruce Fields 已提交
1209
	write->wr_buflen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1210 1211 1212 1213 1214 1215 1216

	/* Sorry .. no magic macros for this.. *
	 * READ_BUF(write->wr_buflen);
	 * SAVEMEM(write->wr_buf, write->wr_buflen);
	 */
	avail = (char*)argp->end - (char*)argp->p;
	if (avail + argp->pagelen < write->wr_buflen) {
1217 1218
		dprintk("NFSD: xdr error (%s:%d)\n",
				__FILE__, __LINE__);
L
Linus Torvalds 已提交
1219 1220
		goto xdr_error;
	}
1221 1222 1223
	write->wr_head.iov_base = p;
	write->wr_head.iov_len = avail;
	write->wr_pagelist = argp->pagelist;
J
J. Bruce Fields 已提交
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236

	len = XDR_QUADLEN(write->wr_buflen) << 2;
	if (len >= avail) {
		int pages;

		len -= avail;

		pages = len >> PAGE_SHIFT;
		argp->pagelist += pages;
		argp->pagelen -= pages * PAGE_SIZE;
		len -= pages * PAGE_SIZE;

		argp->p = (__be32 *)page_address(argp->pagelist[0]);
1237
		argp->pagelist++;
J
J. Bruce Fields 已提交
1238
		argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
L
Linus Torvalds 已提交
1239
	}
J
J. Bruce Fields 已提交
1240
	argp->p += XDR_QUADLEN(len);
L
Linus Torvalds 已提交
1241 1242 1243 1244

	DECODE_TAIL;
}

1245
static __be32
L
Linus Torvalds 已提交
1246 1247 1248 1249
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
{
	DECODE_HEAD;

1250 1251 1252
	if (argp->minorversion >= 1)
		return nfserr_notsupp;

L
Linus Torvalds 已提交
1253 1254
	READ_BUF(12);
	COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
J
J. Bruce Fields 已提交
1255
	rlockowner->rl_owner.len = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1256 1257 1258
	READ_BUF(rlockowner->rl_owner.len);
	READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);

A
Andy Adamson 已提交
1259 1260
	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
		return nfserr_inval;
L
Linus Torvalds 已提交
1261 1262 1263
	DECODE_TAIL;
}

A
Andy Adamson 已提交
1264 1265
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
A
Andy Adamson 已提交
1266
			 struct nfsd4_exchange_id *exid)
A
Andy Adamson 已提交
1267
{
1268
	int dummy, tmp;
A
Andy Adamson 已提交
1269 1270 1271 1272 1273
	DECODE_HEAD;

	READ_BUF(NFS4_VERIFIER_SIZE);
	COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);

1274 1275 1276
	status = nfsd4_decode_opaque(argp, &exid->clname);
	if (status)
		return nfserr_bad_xdr;
A
Andy Adamson 已提交
1277 1278

	READ_BUF(4);
J
J. Bruce Fields 已提交
1279
	exid->flags = be32_to_cpup(p++);
A
Andy Adamson 已提交
1280 1281 1282

	/* Ignore state_protect4_a */
	READ_BUF(4);
J
J. Bruce Fields 已提交
1283
	exid->spa_how = be32_to_cpup(p++);
A
Andy Adamson 已提交
1284 1285 1286 1287 1288 1289
	switch (exid->spa_how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
		/* spo_must_enforce */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1290
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1291 1292 1293 1294 1295
		READ_BUF(dummy * 4);
		p += dummy;

		/* spo_must_allow */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1296
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1297 1298 1299 1300 1301 1302
		READ_BUF(dummy * 4);
		p += dummy;
		break;
	case SP4_SSV:
		/* ssp_ops */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1303
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1304 1305 1306 1307
		READ_BUF(dummy * 4);
		p += dummy;

		READ_BUF(4);
J
J. Bruce Fields 已提交
1308
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1309 1310 1311 1312 1313
		READ_BUF(dummy * 4);
		p += dummy;

		/* ssp_hash_algs<> */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1314
		tmp = be32_to_cpup(p++);
1315 1316
		while (tmp--) {
			READ_BUF(4);
J
J. Bruce Fields 已提交
1317
			dummy = be32_to_cpup(p++);
1318 1319 1320
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1321 1322 1323

		/* ssp_encr_algs<> */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1324
		tmp = be32_to_cpup(p++);
1325 1326
		while (tmp--) {
			READ_BUF(4);
J
J. Bruce Fields 已提交
1327
			dummy = be32_to_cpup(p++);
1328 1329 1330
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1331 1332 1333

		/* ssp_window and ssp_num_gss_handles */
		READ_BUF(8);
J
J. Bruce Fields 已提交
1334 1335
		dummy = be32_to_cpup(p++);
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1336 1337 1338 1339 1340 1341 1342
		break;
	default:
		goto xdr_error;
	}

	/* Ignore Implementation ID */
	READ_BUF(4);    /* nfs_impl_id4 array length */
J
J. Bruce Fields 已提交
1343
	dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1344 1345 1346 1347 1348 1349 1350

	if (dummy > 1)
		goto xdr_error;

	if (dummy == 1) {
		/* nii_domain */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1351
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1352 1353 1354 1355 1356
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_name */
		READ_BUF(4);
J
J. Bruce Fields 已提交
1357
		dummy = be32_to_cpup(p++);
A
Andy Adamson 已提交
1358 1359 1360 1361 1362 1363 1364 1365
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_date */
		READ_BUF(12);
		p += 3;
	}
	DECODE_TAIL;
A
Andy Adamson 已提交
1366 1367 1368 1369 1370 1371
}

static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
			    struct nfsd4_create_session *sess)
{
A
Andy Adamson 已提交
1372 1373 1374 1375 1376
	DECODE_HEAD;
	u32 dummy;

	READ_BUF(16);
	COPYMEM(&sess->clientid, 8);
J
J. Bruce Fields 已提交
1377 1378
	sess->seqid = be32_to_cpup(p++);
	sess->flags = be32_to_cpup(p++);
A
Andy Adamson 已提交
1379 1380 1381

	/* Fore channel attrs */
	READ_BUF(28);
J
J. Bruce Fields 已提交
1382 1383 1384 1385 1386 1387 1388
	dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
	sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
	sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
	sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
	sess->fore_channel.maxops = be32_to_cpup(p++);
	sess->fore_channel.maxreqs = be32_to_cpup(p++);
	sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
A
Andy Adamson 已提交
1389 1390
	if (sess->fore_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
J
J. Bruce Fields 已提交
1391
		sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
A
Andy Adamson 已提交
1392 1393 1394 1395 1396 1397 1398
	} else if (sess->fore_channel.nr_rdma_attrs > 1) {
		dprintk("Too many fore channel attr bitmaps!\n");
		goto xdr_error;
	}

	/* Back channel attrs */
	READ_BUF(28);
J
J. Bruce Fields 已提交
1399 1400 1401 1402 1403 1404 1405
	dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
	sess->back_channel.maxreq_sz = be32_to_cpup(p++);
	sess->back_channel.maxresp_sz = be32_to_cpup(p++);
	sess->back_channel.maxresp_cached = be32_to_cpup(p++);
	sess->back_channel.maxops = be32_to_cpup(p++);
	sess->back_channel.maxreqs = be32_to_cpup(p++);
	sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
A
Andy Adamson 已提交
1406 1407
	if (sess->back_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
J
J. Bruce Fields 已提交
1408
		sess->back_channel.rdma_attrs = be32_to_cpup(p++);
A
Andy Adamson 已提交
1409 1410 1411 1412 1413
	} else if (sess->back_channel.nr_rdma_attrs > 1) {
		dprintk("Too many back channel attr bitmaps!\n");
		goto xdr_error;
	}

1414
	READ_BUF(4);
J
J. Bruce Fields 已提交
1415
	sess->callback_prog = be32_to_cpup(p++);
1416
	nfsd4_decode_cb_sec(argp, &sess->cb_sec);
A
Andy Adamson 已提交
1417
	DECODE_TAIL;
A
Andy Adamson 已提交
1418 1419 1420 1421 1422 1423
}

static __be32
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
			     struct nfsd4_destroy_session *destroy_session)
{
B
Benny Halevy 已提交
1424 1425 1426 1427 1428
	DECODE_HEAD;
	READ_BUF(NFS4_MAX_SESSIONID_LEN);
	COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);

	DECODE_TAIL;
A
Andy Adamson 已提交
1429 1430
}

1431 1432 1433 1434 1435 1436 1437
static __be32
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
			  struct nfsd4_free_stateid *free_stateid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(stateid_t));
J
J. Bruce Fields 已提交
1438
	free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1439 1440 1441 1442 1443
	COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1444 1445 1446 1447
static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
		      struct nfsd4_sequence *seq)
{
B
Benny Halevy 已提交
1448 1449 1450 1451
	DECODE_HEAD;

	READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
	COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
J
J. Bruce Fields 已提交
1452 1453 1454 1455
	seq->seqid = be32_to_cpup(p++);
	seq->slotid = be32_to_cpup(p++);
	seq->maxslots = be32_to_cpup(p++);
	seq->cachethis = be32_to_cpup(p++);
B
Benny Halevy 已提交
1456 1457

	DECODE_TAIL;
A
Andy Adamson 已提交
1458 1459
}

1460 1461 1462 1463
static __be32
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
{
	int i;
1464 1465
	__be32 *p, status;
	struct nfsd4_test_stateid_id *stateid;
1466 1467 1468 1469

	READ_BUF(4);
	test_stateid->ts_num_ids = ntohl(*p++);

1470
	INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1471 1472

	for (i = 0; i < test_stateid->ts_num_ids; i++) {
1473
		stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1474
		if (!stateid) {
1475
			status = nfserrno(-ENOMEM);
1476 1477 1478 1479 1480 1481 1482
			goto out;
		}

		INIT_LIST_HEAD(&stateid->ts_id_list);
		list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);

		status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1483
		if (status)
1484
			goto out;
1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495
	}

	status = 0;
out:
	return status;
xdr_error:
	dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
	status = nfserr_bad_xdr;
	goto out;
}

1496 1497 1498 1499 1500 1501 1502 1503 1504 1505
static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
{
	DECODE_HEAD;

	READ_BUF(8);
	COPYMEM(&dc->clientid, 8);

	DECODE_TAIL;
}

1506 1507 1508 1509 1510
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
{
	DECODE_HEAD;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1511
	rc->rca_one_fs = be32_to_cpup(p++);
1512 1513 1514 1515

	DECODE_TAIL;
}

A
Anna Schumaker 已提交
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532
static __be32
nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
		       struct nfsd4_fallocate *fallocate)
{
	DECODE_HEAD;

	status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
	if (status)
		return status;

	READ_BUF(16);
	p = xdr_decode_hyper(p, &fallocate->falloc_offset);
	xdr_decode_hyper(p, &fallocate->falloc_length);

	DECODE_TAIL;
}

A
Anna Schumaker 已提交
1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
static __be32
nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
{
	DECODE_HEAD;

	status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
	if (status)
		return status;

	READ_BUF(8 + 4);
	p = xdr_decode_hyper(p, &seek->seek_offset);
	seek->seek_whence = be32_to_cpup(p);

	DECODE_TAIL;
}

1549 1550 1551 1552 1553 1554
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
	return nfs_ok;
}

1555 1556 1557
static __be32
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
{
1558
	return nfserr_notsupp;
1559 1560
}

1561 1562 1563
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);

static nfsd4_dec nfsd4_dec_ops[] = {
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583
	[OP_ACCESS]		= (nfsd4_dec)nfsd4_decode_access,
	[OP_CLOSE]		= (nfsd4_dec)nfsd4_decode_close,
	[OP_COMMIT]		= (nfsd4_dec)nfsd4_decode_commit,
	[OP_CREATE]		= (nfsd4_dec)nfsd4_decode_create,
	[OP_DELEGPURGE]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_DELEGRETURN]	= (nfsd4_dec)nfsd4_decode_delegreturn,
	[OP_GETATTR]		= (nfsd4_dec)nfsd4_decode_getattr,
	[OP_GETFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_LINK]		= (nfsd4_dec)nfsd4_decode_link,
	[OP_LOCK]		= (nfsd4_dec)nfsd4_decode_lock,
	[OP_LOCKT]		= (nfsd4_dec)nfsd4_decode_lockt,
	[OP_LOCKU]		= (nfsd4_dec)nfsd4_decode_locku,
	[OP_LOOKUP]		= (nfsd4_dec)nfsd4_decode_lookup,
	[OP_LOOKUPP]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_NVERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
	[OP_OPEN]		= (nfsd4_dec)nfsd4_decode_open,
	[OP_OPENATTR]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_OPEN_CONFIRM]	= (nfsd4_dec)nfsd4_decode_open_confirm,
	[OP_OPEN_DOWNGRADE]	= (nfsd4_dec)nfsd4_decode_open_downgrade,
	[OP_PUTFH]		= (nfsd4_dec)nfsd4_decode_putfh,
1584
	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_putpubfh,
1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600
	[OP_PUTROOTFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_READ]		= (nfsd4_dec)nfsd4_decode_read,
	[OP_READDIR]		= (nfsd4_dec)nfsd4_decode_readdir,
	[OP_READLINK]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_REMOVE]		= (nfsd4_dec)nfsd4_decode_remove,
	[OP_RENAME]		= (nfsd4_dec)nfsd4_decode_rename,
	[OP_RENEW]		= (nfsd4_dec)nfsd4_decode_renew,
	[OP_RESTOREFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_SAVEFH]		= (nfsd4_dec)nfsd4_decode_noop,
	[OP_SECINFO]		= (nfsd4_dec)nfsd4_decode_secinfo,
	[OP_SETATTR]		= (nfsd4_dec)nfsd4_decode_setattr,
	[OP_SETCLIENTID]	= (nfsd4_dec)nfsd4_decode_setclientid,
	[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
	[OP_VERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
	[OP_WRITE]		= (nfsd4_dec)nfsd4_decode_write,
	[OP_RELEASE_LOCKOWNER]	= (nfsd4_dec)nfsd4_decode_release_lockowner,
A
Andy Adamson 已提交
1601 1602

	/* new operations for NFSv4.1 */
1603
	[OP_BACKCHANNEL_CTL]	= (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1604
	[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
R
Randy Dunlap 已提交
1605 1606 1607
	[OP_EXCHANGE_ID]	= (nfsd4_dec)nfsd4_decode_exchange_id,
	[OP_CREATE_SESSION]	= (nfsd4_dec)nfsd4_decode_create_session,
	[OP_DESTROY_SESSION]	= (nfsd4_dec)nfsd4_decode_destroy_session,
1608
	[OP_FREE_STATEID]	= (nfsd4_dec)nfsd4_decode_free_stateid,
R
Randy Dunlap 已提交
1609 1610 1611 1612 1613 1614
	[OP_GET_DIR_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_GETDEVICEINFO]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_GETDEVICELIST]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTCOMMIT]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTGET]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTRETURN]	= (nfsd4_dec)nfsd4_decode_notsupp,
J
J. Bruce Fields 已提交
1615
	[OP_SECINFO_NO_NAME]	= (nfsd4_dec)nfsd4_decode_secinfo_no_name,
R
Randy Dunlap 已提交
1616 1617
	[OP_SEQUENCE]		= (nfsd4_dec)nfsd4_decode_sequence,
	[OP_SET_SSV]		= (nfsd4_dec)nfsd4_decode_notsupp,
1618
	[OP_TEST_STATEID]	= (nfsd4_dec)nfsd4_decode_test_stateid,
R
Randy Dunlap 已提交
1619
	[OP_WANT_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
1620
	[OP_DESTROY_CLIENTID]	= (nfsd4_dec)nfsd4_decode_destroy_clientid,
1621
	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,
1622 1623

	/* new operations for NFSv4.2 */
A
Anna Schumaker 已提交
1624
	[OP_ALLOCATE]		= (nfsd4_dec)nfsd4_decode_fallocate,
1625 1626
	[OP_COPY]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_COPY_NOTIFY]	= (nfsd4_dec)nfsd4_decode_notsupp,
A
Anna Schumaker 已提交
1627
	[OP_DEALLOCATE]		= (nfsd4_dec)nfsd4_decode_fallocate,
1628 1629 1630 1631 1632 1633
	[OP_IO_ADVISE]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTERROR]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_LAYOUTSTATS]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_OFFLOAD_CANCEL]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_OFFLOAD_STATUS]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_READ_PLUS]		= (nfsd4_dec)nfsd4_decode_notsupp,
A
Anna Schumaker 已提交
1634
	[OP_SEEK]		= (nfsd4_dec)nfsd4_decode_seek,
1635
	[OP_WRITE_SAME]		= (nfsd4_dec)nfsd4_decode_notsupp,
A
Andy Adamson 已提交
1636 1637
};

1638 1639 1640
static inline bool
nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
{
1641
	if (op->opnum < FIRST_NFS4_OP)
1642
		return false;
1643
	else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1644
		return false;
1645 1646 1647
	else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
		return false;
	else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1648 1649 1650
		return false;
	return true;
}
1651

1652
static __be32
L
Linus Torvalds 已提交
1653 1654 1655 1656
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
	DECODE_HEAD;
	struct nfsd4_op *op;
1657
	bool cachethis = false;
1658 1659
	int auth_slack= argp->rqstp->rq_auth_slack;
	int max_reply = auth_slack + 8; /* opcnt, status */
1660 1661
	int readcount = 0;
	int readbytes = 0;
L
Linus Torvalds 已提交
1662 1663 1664
	int i;

	READ_BUF(4);
J
J. Bruce Fields 已提交
1665
	argp->taglen = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1666 1667
	READ_BUF(argp->taglen + 8);
	SAVEMEM(argp->tag, argp->taglen);
J
J. Bruce Fields 已提交
1668 1669
	argp->minorversion = be32_to_cpup(p++);
	argp->opcnt = be32_to_cpup(p++);
1670
	max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
L
Linus Torvalds 已提交
1671 1672 1673 1674 1675 1676

	if (argp->taglen > NFSD4_MAX_TAGLEN)
		goto xdr_error;
	if (argp->opcnt > 100)
		goto xdr_error;

1677
	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1678
		argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
L
Linus Torvalds 已提交
1679 1680
		if (!argp->ops) {
			argp->ops = argp->iops;
1681
			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
L
Linus Torvalds 已提交
1682 1683 1684 1685
			goto xdr_error;
		}
	}

1686
	if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1687 1688
		argp->opcnt = 0;

L
Linus Torvalds 已提交
1689 1690 1691 1692
	for (i = 0; i < argp->opcnt; i++) {
		op = &argp->ops[i];
		op->replay = NULL;

J
J. Bruce Fields 已提交
1693
		READ_BUF(4);
J
J. Bruce Fields 已提交
1694
		op->opnum = be32_to_cpup(p++);
L
Linus Torvalds 已提交
1695

1696 1697
		if (nfsd4_opnum_in_range(argp, op))
			op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1698
		else {
L
Linus Torvalds 已提交
1699 1700 1701
			op->opnum = OP_ILLEGAL;
			op->status = nfserr_op_illegal;
		}
1702 1703 1704 1705 1706
		/*
		 * We'll try to cache the result in the DRC if any one
		 * op in the compound wants to be cached:
		 */
		cachethis |= nfsd4_cache_this_op(op);
1707

1708 1709 1710 1711 1712
		if (op->opnum == OP_READ) {
			readcount++;
			readbytes += nfsd4_max_reply(argp->rqstp, op);
		} else
			max_reply += nfsd4_max_reply(argp->rqstp, op);
1713 1714 1715 1716 1717 1718 1719 1720
		/*
		 * OP_LOCK may return a conflicting lock.  (Special case
		 * because it will just skip encoding this if it runs
		 * out of xdr buffer space, and it is the only operation
		 * that behaves this way.)
		 */
		if (op->opnum == OP_LOCK)
			max_reply += NFS4_OPAQUE_LIMIT;
1721 1722 1723 1724 1725

		if (op->status) {
			argp->opcnt = i+1;
			break;
		}
L
Linus Torvalds 已提交
1726
	}
1727 1728 1729
	/* Sessions make the DRC unnecessary: */
	if (argp->minorversion)
		cachethis = false;
1730
	svc_reserve(argp->rqstp, max_reply + readbytes);
1731
	argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
L
Linus Torvalds 已提交
1732

1733
	if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1734
		clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1735

L
Linus Torvalds 已提交
1736 1737 1738
	DECODE_TAIL;
}

J
J. Bruce Fields 已提交
1739
static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
J
J. Bruce Fields 已提交
1740 1741
{
	if (IS_I_VERSION(inode)) {
J
J. Bruce Fields 已提交
1742
		p = xdr_encode_hyper(p, inode->i_version);
J
J. Bruce Fields 已提交
1743
	} else {
J
J. Bruce Fields 已提交
1744 1745
		*p++ = cpu_to_be32(stat->ctime.tv_sec);
		*p++ = cpu_to_be32(stat->ctime.tv_nsec);
J
J. Bruce Fields 已提交
1746
	}
J
J. Bruce Fields 已提交
1747
	return p;
J
J. Bruce Fields 已提交
1748 1749
}

J
J. Bruce Fields 已提交
1750
static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
J
J. Bruce Fields 已提交
1751
{
J
J. Bruce Fields 已提交
1752
	*p++ = cpu_to_be32(c->atomic);
J
J. Bruce Fields 已提交
1753
	if (c->change_supported) {
J
J. Bruce Fields 已提交
1754 1755
		p = xdr_encode_hyper(p, c->before_change);
		p = xdr_encode_hyper(p, c->after_change);
J
J. Bruce Fields 已提交
1756
	} else {
J
J. Bruce Fields 已提交
1757 1758 1759 1760
		*p++ = cpu_to_be32(c->before_ctime_sec);
		*p++ = cpu_to_be32(c->before_ctime_nsec);
		*p++ = cpu_to_be32(c->after_ctime_sec);
		*p++ = cpu_to_be32(c->after_ctime_nsec);
J
J. Bruce Fields 已提交
1761
	}
J
J. Bruce Fields 已提交
1762
	return p;
J
J. Bruce Fields 已提交
1763
}
L
Linus Torvalds 已提交
1764

1765
/* Encode as an array of strings the string given with components
1766
 * separated @sep, escaped with esc_enter and esc_exit.
1767
 */
1768 1769 1770
static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
					  char *components, char esc_enter,
					  char esc_exit)
1771
{
1772
	__be32 *p;
1773 1774
	__be32 pathlen;
	int pathlen_offset;
1775
	int strlen, count=0;
1776
	char *str, *end, *next;
1777 1778

	dprintk("nfsd4_encode_components(%s)\n", components);
1779 1780

	pathlen_offset = xdr->buf->len;
1781 1782
	p = xdr_reserve_space(xdr, 4);
	if (!p)
1783
		return nfserr_resource;
1784 1785
	p++; /* We will fill this in with @count later */

1786 1787
	end = str = components;
	while (*end) {
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
		bool found_esc = false;

		/* try to parse as esc_start, ..., esc_end, sep */
		if (*str == esc_enter) {
			for (; *end && (*end != esc_exit); end++)
				/* find esc_exit or end of string */;
			next = end + 1;
			if (*end && (!*next || *next == sep)) {
				str++;
				found_esc = true;
			}
		}

		if (!found_esc)
			for (; *end && (*end != sep); end++)
				/* find sep or end of string */;

1805 1806
		strlen = end - str;
		if (strlen) {
1807 1808
			p = xdr_reserve_space(xdr, strlen + 4);
			if (!p)
1809
				return nfserr_resource;
J
J. Bruce Fields 已提交
1810
			p = xdr_encode_opaque(p, str, strlen);
1811 1812 1813 1814
			count++;
		}
		else
			end++;
1815 1816 1817
		if (found_esc)
			end = next;

1818 1819
		str = end;
	}
1820
	pathlen = htonl(count);
1821
	write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1822 1823 1824
	return 0;
}

1825 1826 1827
/* Encode as an array of strings the string given with components
 * separated @sep.
 */
1828 1829
static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
				      char *components)
1830
{
1831
	return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1832 1833
}

1834 1835 1836
/*
 * encode a location element of a fs_locations structure
 */
1837 1838
static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
					struct nfsd4_fs_location *location)
1839
{
1840
	__be32 status;
1841

1842
	status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1843
						'[', ']');
1844 1845
	if (status)
		return status;
1846
	status = nfsd4_encode_components(xdr, '/', location->path);
1847 1848 1849 1850 1851 1852
	if (status)
		return status;
	return 0;
}

/*
T
Trond Myklebust 已提交
1853
 * Encode a path in RFC3530 'pathname4' format
1854
 */
1855 1856 1857
static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
				const struct path *root,
				const struct path *path)
1858
{
1859
	struct path cur = *path;
1860
	__be32 *p;
T
Trond Myklebust 已提交
1861 1862 1863
	struct dentry **components = NULL;
	unsigned int ncomponents = 0;
	__be32 err = nfserr_jukebox;
1864

T
Trond Myklebust 已提交
1865
	dprintk("nfsd4_encode_components(");
1866

T
Trond Myklebust 已提交
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890
	path_get(&cur);
	/* First walk the path up to the nfsd root, and store the
	 * dentries/path components in an array.
	 */
	for (;;) {
		if (cur.dentry == root->dentry && cur.mnt == root->mnt)
			break;
		if (cur.dentry == cur.mnt->mnt_root) {
			if (follow_up(&cur))
				continue;
			goto out_free;
		}
		if ((ncomponents & 15) == 0) {
			struct dentry **new;
			new = krealloc(components,
					sizeof(*new) * (ncomponents + 16),
					GFP_KERNEL);
			if (!new)
				goto out_free;
			components = new;
		}
		components[ncomponents++] = cur.dentry;
		cur.dentry = dget_parent(cur.dentry);
	}
1891 1892 1893
	err = nfserr_resource;
	p = xdr_reserve_space(xdr, 4);
	if (!p)
T
Trond Myklebust 已提交
1894
		goto out_free;
J
J. Bruce Fields 已提交
1895
	*p++ = cpu_to_be32(ncomponents);
T
Trond Myklebust 已提交
1896 1897 1898

	while (ncomponents) {
		struct dentry *dentry = components[ncomponents - 1];
1899
		unsigned int len;
T
Trond Myklebust 已提交
1900

1901 1902
		spin_lock(&dentry->d_lock);
		len = dentry->d_name.len;
1903 1904
		p = xdr_reserve_space(xdr, len + 4);
		if (!p) {
1905
			spin_unlock(&dentry->d_lock);
T
Trond Myklebust 已提交
1906
			goto out_free;
1907
		}
J
J. Bruce Fields 已提交
1908
		p = xdr_encode_opaque(p, dentry->d_name.name, len);
A
Al Viro 已提交
1909
		dprintk("/%pd", dentry);
1910
		spin_unlock(&dentry->d_lock);
T
Trond Myklebust 已提交
1911 1912
		dput(dentry);
		ncomponents--;
1913
	}
T
Trond Myklebust 已提交
1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924

	err = 0;
out_free:
	dprintk(")\n");
	while (ncomponents)
		dput(components[--ncomponents]);
	kfree(components);
	path_put(&cur);
	return err;
}

1925 1926
static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
			struct svc_rqst *rqstp, const struct path *path)
T
Trond Myklebust 已提交
1927 1928 1929 1930 1931 1932 1933
{
	struct svc_export *exp_ps;
	__be32 res;

	exp_ps = rqst_find_fsidzero_export(rqstp);
	if (IS_ERR(exp_ps))
		return nfserrno(PTR_ERR(exp_ps));
1934
	res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
T
Trond Myklebust 已提交
1935 1936
	exp_put(exp_ps);
	return res;
1937 1938 1939 1940 1941
}

/*
 *  encode a fs_locations structure
 */
1942 1943
static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
			struct svc_rqst *rqstp, struct svc_export *exp)
1944
{
1945
	__be32 status;
1946
	int i;
1947
	__be32 *p;
1948 1949
	struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;

1950
	status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1951 1952
	if (status)
		return status;
1953 1954
	p = xdr_reserve_space(xdr, 4);
	if (!p)
1955
		return nfserr_resource;
J
J. Bruce Fields 已提交
1956
	*p++ = cpu_to_be32(fslocs->locations_count);
1957
	for (i=0; i<fslocs->locations_count; i++) {
1958
		status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1959 1960 1961 1962 1963
		if (status)
			return status;
	}
	return 0;
}
L
Linus Torvalds 已提交
1964

1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
static u32 nfs4_file_type(umode_t mode)
{
	switch (mode & S_IFMT) {
	case S_IFIFO:	return NF4FIFO;
	case S_IFCHR:	return NF4CHR;
	case S_IFDIR:	return NF4DIR;
	case S_IFBLK:	return NF4BLK;
	case S_IFLNK:	return NF4LNK;
	case S_IFREG:	return NF4REG;
	case S_IFSOCK:	return NF4SOCK;
	default:	return NF4BAD;
	};
}
L
Linus Torvalds 已提交
1978

1979
static inline __be32
1980 1981
nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
		     struct nfs4_ace *ace)
L
Linus Torvalds 已提交
1982
{
1983
	if (ace->whotype != NFS4_ACL_WHO_NAMED)
1984
		return nfs4_acl_write_who(xdr, ace->whotype);
1985
	else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1986
		return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1987
	else
1988
		return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
L
Linus Torvalds 已提交
1989 1990
}

1991 1992 1993 1994
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
			      FATTR4_WORD0_RDATTR_ERROR)
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID

1995 1996
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
static inline __be32
1997 1998
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
			    void *context, int len)
1999
{
2000
	__be32 *p;
2001

2002 2003
	p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
	if (!p)
2004 2005 2006 2007 2008 2009
		return nfserr_resource;

	/*
	 * For now we use a 0 here to indicate the null translation; in
	 * the future we may place a call to translation code here.
	 */
J
J. Bruce Fields 已提交
2010 2011
	*p++ = cpu_to_be32(0); /* lfs */
	*p++ = cpu_to_be32(0); /* pi */
2012 2013 2014 2015 2016
	p = xdr_encode_opaque(p, context, len);
	return 0;
}
#else
static inline __be32
2017 2018
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
			    void *context, int len)
2019 2020 2021
{ return 0; }
#endif

2022
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036
{
	/* As per referral draft:  */
	if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
	    *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
		if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
	            *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
			*rdattr_err = NFSERR_MOVED;
		else
			return nfserr_moved;
	}
	*bmval0 &= WORD0_ABSENT_FS_ATTRS;
	*bmval1 &= WORD1_ABSENT_FS_ATTRS;
	return 0;
}
L
Linus Torvalds 已提交
2037

2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048

static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
{
	struct path path = exp->ex_path;
	int err;

	path_get(&path);
	while (follow_up(&path)) {
		if (path.dentry != path.mnt->mnt_root)
			break;
	}
A
Al Viro 已提交
2049
	err = vfs_getattr(&path, stat);
2050 2051 2052 2053
	path_put(&path);
	return err;
}

L
Linus Torvalds 已提交
2054 2055 2056 2057
/*
 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
 * ourselves.
 */
2058
static __be32
2059 2060 2061
nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
		struct svc_export *exp,
		struct dentry *dentry, u32 *bmval,
2062
		struct svc_rqst *rqstp, int ignore_crossmnt)
L
Linus Torvalds 已提交
2063 2064 2065
{
	u32 bmval0 = bmval[0];
	u32 bmval1 = bmval[1];
2066
	u32 bmval2 = bmval[2];
L
Linus Torvalds 已提交
2067
	struct kstat stat;
2068
	struct svc_fh *tempfh = NULL;
L
Linus Torvalds 已提交
2069
	struct kstatfs statfs;
2070
	__be32 *p;
J
J. Bruce Fields 已提交
2071
	int starting_len = xdr->buf->len;
2072 2073
	int attrlen_offset;
	__be32 attrlen;
L
Linus Torvalds 已提交
2074 2075
	u32 dummy;
	u64 dummy64;
2076
	u32 rdattr_err = 0;
2077
	__be32 status;
2078
	int err;
L
Linus Torvalds 已提交
2079 2080
	int aclsupport = 0;
	struct nfs4_acl *acl = NULL;
2081 2082 2083
	void *context = NULL;
	int contextlen;
	bool contextsupport = false;
2084 2085
	struct nfsd4_compoundres *resp = rqstp->rq_resp;
	u32 minorversion = resp->cstate.minorversion;
2086 2087 2088 2089
	struct path path = {
		.mnt	= exp->ex_path.mnt,
		.dentry	= dentry,
	};
2090
	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
L
Linus Torvalds 已提交
2091 2092

	BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2093 2094 2095
	BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
	BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
	BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
L
Linus Torvalds 已提交
2096

2097
	if (exp->ex_fslocs.migrated) {
2098
		BUG_ON(bmval[2]);
2099 2100 2101 2102 2103
		status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
		if (status)
			goto out;
	}

A
Al Viro 已提交
2104
	err = vfs_getattr(&path, &stat);
2105
	if (err)
L
Linus Torvalds 已提交
2106
		goto out_nfserr;
2107 2108
	if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
			FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
L
Linus Torvalds 已提交
2109 2110
	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
		       FATTR4_WORD1_SPACE_TOTAL))) {
2111
		err = vfs_statfs(&path, &statfs);
2112
		if (err)
L
Linus Torvalds 已提交
2113 2114 2115
			goto out_nfserr;
	}
	if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2116 2117 2118 2119 2120 2121
		tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
		status = nfserr_jukebox;
		if (!tempfh)
			goto out;
		fh_init(tempfh, NFS4_FHSIZE);
		status = fh_compose(tempfh, exp, dentry, NULL);
L
Linus Torvalds 已提交
2122 2123
		if (status)
			goto out;
2124
		fhp = tempfh;
L
Linus Torvalds 已提交
2125 2126 2127
	}
	if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
			| FATTR4_WORD0_SUPPORTED_ATTRS)) {
2128 2129
		err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
		aclsupport = (err == 0);
L
Linus Torvalds 已提交
2130
		if (bmval0 & FATTR4_WORD0_ACL) {
2131
			if (err == -EOPNOTSUPP)
L
Linus Torvalds 已提交
2132
				bmval0 &= ~FATTR4_WORD0_ACL;
2133
			else if (err == -EINVAL) {
L
Linus Torvalds 已提交
2134 2135
				status = nfserr_attrnotsupp;
				goto out;
2136
			} else if (err != 0)
L
Linus Torvalds 已提交
2137 2138 2139 2140
				goto out_nfserr;
		}
	}

2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
	if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
			bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
		err = security_inode_getsecctx(dentry->d_inode,
						&context, &contextlen);
		contextsupport = (err == 0);
		if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
			if (err == -EOPNOTSUPP)
				bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
			else if (err)
				goto out_nfserr;
		}
	}
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */

2156
	if (bmval2) {
2157 2158
		p = xdr_reserve_space(xdr, 16);
		if (!p)
2159
			goto out_resource;
J
J. Bruce Fields 已提交
2160 2161 2162 2163
		*p++ = cpu_to_be32(3);
		*p++ = cpu_to_be32(bmval0);
		*p++ = cpu_to_be32(bmval1);
		*p++ = cpu_to_be32(bmval2);
2164
	} else if (bmval1) {
2165 2166
		p = xdr_reserve_space(xdr, 12);
		if (!p)
2167
			goto out_resource;
J
J. Bruce Fields 已提交
2168 2169 2170
		*p++ = cpu_to_be32(2);
		*p++ = cpu_to_be32(bmval0);
		*p++ = cpu_to_be32(bmval1);
2171
	} else {
2172 2173
		p = xdr_reserve_space(xdr, 8);
		if (!p)
2174
			goto out_resource;
J
J. Bruce Fields 已提交
2175 2176
		*p++ = cpu_to_be32(1);
		*p++ = cpu_to_be32(bmval0);
2177
	}
2178 2179

	attrlen_offset = xdr->buf->len;
2180 2181 2182
	p = xdr_reserve_space(xdr, 4);
	if (!p)
		goto out_resource;
2183
	p++;                /* to be backfilled later */
L
Linus Torvalds 已提交
2184 2185

	if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2186 2187 2188 2189
		u32 word0 = nfsd_suppattrs0(minorversion);
		u32 word1 = nfsd_suppattrs1(minorversion);
		u32 word2 = nfsd_suppattrs2(minorversion);

2190 2191
		if (!aclsupport)
			word0 &= ~FATTR4_WORD0_ACL;
2192 2193
		if (!contextsupport)
			word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2194
		if (!word2) {
2195 2196
			p = xdr_reserve_space(xdr, 12);
			if (!p)
2197
				goto out_resource;
J
J. Bruce Fields 已提交
2198 2199 2200
			*p++ = cpu_to_be32(2);
			*p++ = cpu_to_be32(word0);
			*p++ = cpu_to_be32(word1);
2201
		} else {
2202 2203
			p = xdr_reserve_space(xdr, 16);
			if (!p)
2204
				goto out_resource;
J
J. Bruce Fields 已提交
2205 2206 2207 2208
			*p++ = cpu_to_be32(3);
			*p++ = cpu_to_be32(word0);
			*p++ = cpu_to_be32(word1);
			*p++ = cpu_to_be32(word2);
2209
		}
L
Linus Torvalds 已提交
2210 2211
	}
	if (bmval0 & FATTR4_WORD0_TYPE) {
2212 2213
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2214
			goto out_resource;
2215
		dummy = nfs4_file_type(stat.mode);
2216 2217 2218 2219
		if (dummy == NF4BAD) {
			status = nfserr_serverfault;
			goto out;
		}
J
J. Bruce Fields 已提交
2220
		*p++ = cpu_to_be32(dummy);
L
Linus Torvalds 已提交
2221 2222
	}
	if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2223 2224
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2225
			goto out_resource;
N
NeilBrown 已提交
2226
		if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
J
J. Bruce Fields 已提交
2227
			*p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
N
NeilBrown 已提交
2228
		else
J
J. Bruce Fields 已提交
2229 2230
			*p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
						NFS4_FH_VOL_RENAME);
L
Linus Torvalds 已提交
2231 2232
	}
	if (bmval0 & FATTR4_WORD0_CHANGE) {
2233 2234
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2235
			goto out_resource;
J
J. Bruce Fields 已提交
2236
		p = encode_change(p, &stat, dentry->d_inode);
L
Linus Torvalds 已提交
2237 2238
	}
	if (bmval0 & FATTR4_WORD0_SIZE) {
2239 2240
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2241
			goto out_resource;
J
J. Bruce Fields 已提交
2242
		p = xdr_encode_hyper(p, stat.size);
L
Linus Torvalds 已提交
2243 2244
	}
	if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2245 2246
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2247
			goto out_resource;
J
J. Bruce Fields 已提交
2248
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2249 2250
	}
	if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2251 2252
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2253
			goto out_resource;
J
J. Bruce Fields 已提交
2254
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2255 2256
	}
	if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2257 2258
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2259
			goto out_resource;
J
J. Bruce Fields 已提交
2260
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
2261 2262
	}
	if (bmval0 & FATTR4_WORD0_FSID) {
2263 2264
		p = xdr_reserve_space(xdr, 16);
		if (!p)
L
Linus Torvalds 已提交
2265
			goto out_resource;
2266
		if (exp->ex_fslocs.migrated) {
J
J. Bruce Fields 已提交
2267 2268
			p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
			p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2269 2270
		} else switch(fsid_source(fhp)) {
		case FSIDSOURCE_FSID:
J
J. Bruce Fields 已提交
2271 2272
			p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
			p = xdr_encode_hyper(p, (u64)0);
2273 2274
			break;
		case FSIDSOURCE_DEV:
J
J. Bruce Fields 已提交
2275 2276 2277 2278
			*p++ = cpu_to_be32(0);
			*p++ = cpu_to_be32(MAJOR(stat.dev));
			*p++ = cpu_to_be32(0);
			*p++ = cpu_to_be32(MINOR(stat.dev));
2279 2280
			break;
		case FSIDSOURCE_UUID:
2281 2282
			p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
								EX_UUID_LEN);
2283
			break;
L
Linus Torvalds 已提交
2284 2285 2286
		}
	}
	if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2287 2288
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2289
			goto out_resource;
J
J. Bruce Fields 已提交
2290
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
2291 2292
	}
	if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2293 2294
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2295
			goto out_resource;
J
J. Bruce Fields 已提交
2296
		*p++ = cpu_to_be32(nn->nfsd4_lease);
L
Linus Torvalds 已提交
2297 2298
	}
	if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2299 2300
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2301
			goto out_resource;
J
J. Bruce Fields 已提交
2302
		*p++ = cpu_to_be32(rdattr_err);
L
Linus Torvalds 已提交
2303 2304 2305 2306 2307
	}
	if (bmval0 & FATTR4_WORD0_ACL) {
		struct nfs4_ace *ace;

		if (acl == NULL) {
2308 2309
			p = xdr_reserve_space(xdr, 4);
			if (!p)
L
Linus Torvalds 已提交
2310 2311
				goto out_resource;

J
J. Bruce Fields 已提交
2312
			*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
2313 2314
			goto out_acl;
		}
2315 2316
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2317
			goto out_resource;
J
J. Bruce Fields 已提交
2318
		*p++ = cpu_to_be32(acl->naces);
L
Linus Torvalds 已提交
2319

2320
		for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2321 2322
			p = xdr_reserve_space(xdr, 4*3);
			if (!p)
L
Linus Torvalds 已提交
2323
				goto out_resource;
J
J. Bruce Fields 已提交
2324 2325 2326 2327
			*p++ = cpu_to_be32(ace->type);
			*p++ = cpu_to_be32(ace->flag);
			*p++ = cpu_to_be32(ace->access_mask &
							NFS4_ACE_MASK_ALL);
2328
			status = nfsd4_encode_aclname(xdr, rqstp, ace);
L
Linus Torvalds 已提交
2329 2330 2331 2332 2333 2334
			if (status)
				goto out;
		}
	}
out_acl:
	if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2335 2336
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2337
			goto out_resource;
J
J. Bruce Fields 已提交
2338
		*p++ = cpu_to_be32(aclsupport ?
L
Linus Torvalds 已提交
2339 2340 2341
			ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
	}
	if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2342 2343
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2344
			goto out_resource;
J
J. Bruce Fields 已提交
2345
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2346 2347
	}
	if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2348 2349
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2350
			goto out_resource;
J
J. Bruce Fields 已提交
2351
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
2352 2353
	}
	if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2354 2355
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2356
			goto out_resource;
J
J. Bruce Fields 已提交
2357
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2358 2359
	}
	if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2360 2361
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2362
			goto out_resource;
J
J. Bruce Fields 已提交
2363
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2364 2365
	}
	if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2366 2367
		p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
		if (!p)
L
Linus Torvalds 已提交
2368
			goto out_resource;
J
J. Bruce Fields 已提交
2369 2370
		p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
					fhp->fh_handle.fh_size);
L
Linus Torvalds 已提交
2371 2372
	}
	if (bmval0 & FATTR4_WORD0_FILEID) {
2373 2374
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2375
			goto out_resource;
J
J. Bruce Fields 已提交
2376
		p = xdr_encode_hyper(p, stat.ino);
L
Linus Torvalds 已提交
2377 2378
	}
	if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2379 2380
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2381
			goto out_resource;
J
J. Bruce Fields 已提交
2382
		p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
L
Linus Torvalds 已提交
2383 2384
	}
	if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2385 2386
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2387
			goto out_resource;
J
J. Bruce Fields 已提交
2388
		p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
L
Linus Torvalds 已提交
2389 2390
	}
	if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2391 2392
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2393
			goto out_resource;
J
J. Bruce Fields 已提交
2394
		p = xdr_encode_hyper(p, (u64) statfs.f_files);
L
Linus Torvalds 已提交
2395
	}
2396
	if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2397
		status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2398 2399 2400
		if (status)
			goto out;
	}
L
Linus Torvalds 已提交
2401
	if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2402 2403
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2404
			goto out_resource;
J
J. Bruce Fields 已提交
2405
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2406 2407
	}
	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2408 2409
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2410
			goto out_resource;
J
J. Bruce Fields 已提交
2411
		p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
L
Linus Torvalds 已提交
2412 2413
	}
	if (bmval0 & FATTR4_WORD0_MAXLINK) {
2414 2415
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2416
			goto out_resource;
J
J. Bruce Fields 已提交
2417
		*p++ = cpu_to_be32(255);
L
Linus Torvalds 已提交
2418 2419
	}
	if (bmval0 & FATTR4_WORD0_MAXNAME) {
2420 2421
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2422
			goto out_resource;
J
J. Bruce Fields 已提交
2423
		*p++ = cpu_to_be32(statfs.f_namelen);
L
Linus Torvalds 已提交
2424 2425
	}
	if (bmval0 & FATTR4_WORD0_MAXREAD) {
2426 2427
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2428
			goto out_resource;
J
J. Bruce Fields 已提交
2429
		p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2430 2431
	}
	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2432 2433
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2434
			goto out_resource;
J
J. Bruce Fields 已提交
2435
		p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2436 2437
	}
	if (bmval1 & FATTR4_WORD1_MODE) {
2438 2439
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2440
			goto out_resource;
J
J. Bruce Fields 已提交
2441
		*p++ = cpu_to_be32(stat.mode & S_IALLUGO);
L
Linus Torvalds 已提交
2442 2443
	}
	if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2444 2445
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2446
			goto out_resource;
J
J. Bruce Fields 已提交
2447
		*p++ = cpu_to_be32(1);
L
Linus Torvalds 已提交
2448 2449
	}
	if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2450 2451
		p = xdr_reserve_space(xdr, 4);
		if (!p)
L
Linus Torvalds 已提交
2452
			goto out_resource;
J
J. Bruce Fields 已提交
2453
		*p++ = cpu_to_be32(stat.nlink);
L
Linus Torvalds 已提交
2454 2455
	}
	if (bmval1 & FATTR4_WORD1_OWNER) {
2456
		status = nfsd4_encode_user(xdr, rqstp, stat.uid);
L
Linus Torvalds 已提交
2457 2458 2459 2460
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2461
		status = nfsd4_encode_group(xdr, rqstp, stat.gid);
L
Linus Torvalds 已提交
2462 2463 2464 2465
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_RAWDEV) {
2466 2467
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2468
			goto out_resource;
J
J. Bruce Fields 已提交
2469 2470
		*p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
		*p++ = cpu_to_be32((u32) MINOR(stat.rdev));
L
Linus Torvalds 已提交
2471 2472
	}
	if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2473 2474
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2475 2476
			goto out_resource;
		dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
J
J. Bruce Fields 已提交
2477
		p = xdr_encode_hyper(p, dummy64);
L
Linus Torvalds 已提交
2478 2479
	}
	if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2480 2481
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2482 2483
			goto out_resource;
		dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
J
J. Bruce Fields 已提交
2484
		p = xdr_encode_hyper(p, dummy64);
L
Linus Torvalds 已提交
2485 2486
	}
	if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2487 2488
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2489 2490
			goto out_resource;
		dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
J
J. Bruce Fields 已提交
2491
		p = xdr_encode_hyper(p, dummy64);
L
Linus Torvalds 已提交
2492 2493
	}
	if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2494 2495
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2496 2497
			goto out_resource;
		dummy64 = (u64)stat.blocks << 9;
J
J. Bruce Fields 已提交
2498
		p = xdr_encode_hyper(p, dummy64);
L
Linus Torvalds 已提交
2499 2500
	}
	if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2501 2502
		p = xdr_reserve_space(xdr, 12);
		if (!p)
L
Linus Torvalds 已提交
2503
			goto out_resource;
J
J. Bruce Fields 已提交
2504
		p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
J
J. Bruce Fields 已提交
2505
		*p++ = cpu_to_be32(stat.atime.tv_nsec);
L
Linus Torvalds 已提交
2506 2507
	}
	if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2508 2509
		p = xdr_reserve_space(xdr, 12);
		if (!p)
L
Linus Torvalds 已提交
2510
			goto out_resource;
J
J. Bruce Fields 已提交
2511 2512 2513
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(1);
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
2514 2515
	}
	if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2516 2517
		p = xdr_reserve_space(xdr, 12);
		if (!p)
L
Linus Torvalds 已提交
2518
			goto out_resource;
J
J. Bruce Fields 已提交
2519
		p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
J
J. Bruce Fields 已提交
2520
		*p++ = cpu_to_be32(stat.ctime.tv_nsec);
L
Linus Torvalds 已提交
2521 2522
	}
	if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2523 2524
		p = xdr_reserve_space(xdr, 12);
		if (!p)
L
Linus Torvalds 已提交
2525
			goto out_resource;
J
J. Bruce Fields 已提交
2526
		p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
J
J. Bruce Fields 已提交
2527
		*p++ = cpu_to_be32(stat.mtime.tv_nsec);
L
Linus Torvalds 已提交
2528 2529
	}
	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2530 2531
		p = xdr_reserve_space(xdr, 8);
		if (!p)
L
Linus Torvalds 已提交
2532
                	goto out_resource;
2533 2534 2535 2536 2537
		/*
		 * Get parent's attributes if not ignoring crossmount
		 * and this is the root of a cross-mounted filesystem.
		 */
		if (ignore_crossmnt == 0 &&
2538 2539
		    dentry == exp->ex_path.mnt->mnt_root)
			get_parent_attributes(exp, &stat);
J
J. Bruce Fields 已提交
2540
		p = xdr_encode_hyper(p, stat.ino);
L
Linus Torvalds 已提交
2541
	}
2542
	if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2543 2544
		status = nfsd4_encode_security_label(xdr, rqstp, context,
								contextlen);
2545 2546 2547
		if (status)
			goto out;
	}
2548
	if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2549 2550
		p = xdr_reserve_space(xdr, 16);
		if (!p)
2551
			goto out_resource;
J
J. Bruce Fields 已提交
2552 2553 2554 2555
		*p++ = cpu_to_be32(3);
		*p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
		*p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
		*p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2556
	}
2557

2558 2559
	attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
	write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
L
Linus Torvalds 已提交
2560 2561 2562
	status = nfs_ok;

out:
2563
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2564 2565
	if (context)
		security_release_secctx(context, contextlen);
2566
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2567
	kfree(acl);
2568
	if (tempfh) {
2569
		fh_put(tempfh);
2570 2571
		kfree(tempfh);
	}
J
J. Bruce Fields 已提交
2572 2573
	if (status)
		xdr_truncate_encode(xdr, starting_len);
L
Linus Torvalds 已提交
2574 2575
	return status;
out_nfserr:
2576
	status = nfserrno(err);
L
Linus Torvalds 已提交
2577 2578 2579 2580 2581 2582
	goto out;
out_resource:
	status = nfserr_resource;
	goto out;
}

2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597
static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
				struct xdr_buf *buf, __be32 *p, int bytes)
{
	xdr->scratch.iov_len = 0;
	memset(buf, 0, sizeof(struct xdr_buf));
	buf->head[0].iov_base = p;
	buf->head[0].iov_len = 0;
	buf->len = 0;
	xdr->buf = buf;
	xdr->iov = buf->head;
	xdr->p = p;
	xdr->end = (void *)p + bytes;
	buf->buflen = bytes;
}

2598 2599 2600 2601 2602
__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
			struct svc_fh *fhp, struct svc_export *exp,
			struct dentry *dentry, u32 *bmval,
			struct svc_rqst *rqstp, int ignore_crossmnt)
{
2603
	struct xdr_buf dummy;
2604 2605 2606
	struct xdr_stream xdr;
	__be32 ret;

2607
	svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2608 2609 2610 2611 2612 2613
	ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
							ignore_crossmnt);
	*p = xdr.p;
	return ret;
}

2614 2615 2616 2617 2618 2619 2620 2621 2622
static inline int attributes_need_mount(u32 *bmval)
{
	if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
		return 1;
	if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
		return 1;
	return 0;
}

2623
static __be32
J
J. Bruce Fields 已提交
2624 2625
nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
			const char *name, int namlen)
L
Linus Torvalds 已提交
2626 2627 2628
{
	struct svc_export *exp = cd->rd_fhp->fh_export;
	struct dentry *dentry;
2629
	__be32 nfserr;
2630
	int ignore_crossmnt = 0;
L
Linus Torvalds 已提交
2631 2632 2633 2634

	dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
	if (IS_ERR(dentry))
		return nfserrno(PTR_ERR(dentry));
2635 2636 2637 2638 2639 2640 2641 2642 2643
	if (!dentry->d_inode) {
		/*
		 * nfsd_buffered_readdir drops the i_mutex between
		 * readdir and calling this callback, leaving a window
		 * where this directory entry could have gone away.
		 */
		dput(dentry);
		return nfserr_noent;
	}
L
Linus Torvalds 已提交
2644 2645

	exp_get(exp);
2646 2647 2648 2649 2650 2651 2652
	/*
	 * In the case of a mountpoint, the client may be asking for
	 * attributes that are only properties of the underlying filesystem
	 * as opposed to the cross-mounted file system. In such a case,
	 * we will not follow the cross mount and will fill the attribtutes
	 * directly from the mountpoint dentry.
	 */
2653
	if (nfsd_mountpoint(dentry, exp)) {
2654 2655
		int err;

2656 2657 2658 2659 2660
		if (!(exp->ex_flags & NFSEXP_V4ROOT)
				&& !attributes_need_mount(cd->rd_bmval)) {
			ignore_crossmnt = 1;
			goto out_encode;
		}
A
Andy Adamson 已提交
2661 2662 2663 2664 2665
		/*
		 * Why the heck aren't we just using nfsd_lookup??
		 * Different "."/".." handling?  Something else?
		 * At least, add a comment here to explain....
		 */
2666 2667 2668
		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
		if (err) {
			nfserr = nfserrno(err);
L
Linus Torvalds 已提交
2669 2670
			goto out_put;
		}
A
Andy Adamson 已提交
2671 2672 2673
		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
		if (nfserr)
			goto out_put;
L
Linus Torvalds 已提交
2674 2675

	}
2676
out_encode:
J
J. Bruce Fields 已提交
2677
	nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2678
					cd->rd_rqstp, ignore_crossmnt);
L
Linus Torvalds 已提交
2679 2680 2681 2682 2683 2684
out_put:
	dput(dentry);
	exp_put(exp);
	return nfserr;
}

A
Al Viro 已提交
2685
static __be32 *
J
J. Bruce Fields 已提交
2686
nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
L
Linus Torvalds 已提交
2687
{
J
J. Bruce Fields 已提交
2688 2689
	__be32 *p;

2690
	p = xdr_reserve_space(xdr, 20);
J
J. Bruce Fields 已提交
2691
	if (!p)
L
Linus Torvalds 已提交
2692 2693 2694 2695 2696
		return NULL;
	*p++ = htonl(2);
	*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
	*p++ = htonl(0);			 /* bmval1 */

2697
	*p++ = htonl(4);     /* attribute length */
L
Linus Torvalds 已提交
2698 2699 2700 2701 2702
	*p++ = nfserr;       /* no htonl */
	return p;
}

static int
2703 2704
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
		    loff_t offset, u64 ino, unsigned int d_type)
L
Linus Torvalds 已提交
2705
{
2706
	struct readdir_cd *ccd = ccdv;
L
Linus Torvalds 已提交
2707
	struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
J
J. Bruce Fields 已提交
2708 2709 2710
	struct xdr_stream *xdr = cd->xdr;
	int start_offset = xdr->buf->len;
	int cookie_offset;
2711
	u32 name_and_cookie;
J
J. Bruce Fields 已提交
2712
	int entry_bytes;
2713
	__be32 nfserr = nfserr_toosmall;
J
J. Bruce Fields 已提交
2714 2715
	__be64 wire_offset;
	__be32 *p;
L
Linus Torvalds 已提交
2716 2717 2718 2719 2720 2721 2722

	/* In nfsv4, "." and ".." never make it onto the wire.. */
	if (name && isdotent(name, namlen)) {
		cd->common.err = nfs_ok;
		return 0;
	}

J
J. Bruce Fields 已提交
2723 2724 2725 2726 2727
	if (cd->cookie_offset) {
		wire_offset = cpu_to_be64(offset);
		write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
							&wire_offset, 8);
	}
L
Linus Torvalds 已提交
2728

J
J. Bruce Fields 已提交
2729 2730
	p = xdr_reserve_space(xdr, 4);
	if (!p)
L
Linus Torvalds 已提交
2731 2732
		goto fail;
	*p++ = xdr_one;                             /* mark entry present */
J
J. Bruce Fields 已提交
2733 2734 2735 2736
	cookie_offset = xdr->buf->len;
	p = xdr_reserve_space(xdr, 3*4 + namlen);
	if (!p)
		goto fail;
L
Linus Torvalds 已提交
2737 2738 2739
	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
	p = xdr_encode_array(p, name, namlen);      /* name length & name */

J
J. Bruce Fields 已提交
2740
	nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
L
Linus Torvalds 已提交
2741 2742 2743 2744 2745 2746
	switch (nfserr) {
	case nfs_ok:
		break;
	case nfserr_resource:
		nfserr = nfserr_toosmall;
		goto fail;
2747
	case nfserr_noent:
2748
		xdr_truncate_encode(xdr, start_offset);
2749
		goto skip_entry;
L
Linus Torvalds 已提交
2750 2751 2752 2753 2754 2755 2756 2757 2758 2759
	default:
		/*
		 * If the client requested the RDATTR_ERROR attribute,
		 * we stuff the error code into this attribute
		 * and continue.  If this attribute was not requested,
		 * then in accordance with the spec, we fail the
		 * entire READDIR operation(!)
		 */
		if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
			goto fail;
J
J. Bruce Fields 已提交
2760
		p = nfsd4_encode_rdattr_error(xdr, nfserr);
2761 2762
		if (p == NULL) {
			nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2763
			goto fail;
2764
		}
L
Linus Torvalds 已提交
2765
	}
J
J. Bruce Fields 已提交
2766 2767 2768 2769 2770
	nfserr = nfserr_toosmall;
	entry_bytes = xdr->buf->len - start_offset;
	if (entry_bytes > cd->rd_maxcount)
		goto fail;
	cd->rd_maxcount -= entry_bytes;
2771 2772 2773 2774
	/*
	 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
	 * let's always let through the first entry, at least:
	 */
2775 2776 2777
	if (!cd->rd_dircount)
		goto fail;
	name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
2778 2779 2780
	if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
		goto fail;
	cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
2781

J
J. Bruce Fields 已提交
2782
	cd->cookie_offset = cookie_offset;
2783
skip_entry:
L
Linus Torvalds 已提交
2784 2785 2786
	cd->common.err = nfs_ok;
	return 0;
fail:
J
J. Bruce Fields 已提交
2787
	xdr_truncate_encode(xdr, start_offset);
L
Linus Torvalds 已提交
2788 2789 2790 2791
	cd->common.err = nfserr;
	return -EINVAL;
}

2792 2793
static __be32
nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2794
{
2795
	__be32 *p;
2796

2797 2798 2799
	p = xdr_reserve_space(xdr, sizeof(stateid_t));
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
2800
	*p++ = cpu_to_be32(sid->si_generation);
J
J. Bruce Fields 已提交
2801 2802
	p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
					sizeof(stateid_opaque_t));
2803
	return 0;
2804 2805
}

2806
static __be32
2807
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
L
Linus Torvalds 已提交
2808
{
2809
	struct xdr_stream *xdr = &resp->xdr;
2810
	__be32 *p;
L
Linus Torvalds 已提交
2811 2812

	if (!nfserr) {
2813 2814 2815
		p = xdr_reserve_space(xdr, 8);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
2816 2817
		*p++ = cpu_to_be32(access->ac_supported);
		*p++ = cpu_to_be32(access->ac_resp_access);
L
Linus Torvalds 已提交
2818
	}
2819
	return nfserr;
L
Linus Torvalds 已提交
2820 2821
}

2822 2823
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
{
2824
	struct xdr_stream *xdr = &resp->xdr;
2825 2826 2827
	__be32 *p;

	if (!nfserr) {
2828 2829 2830
		p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
2831 2832
		p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
						NFS4_MAX_SESSIONID_LEN);
J
J. Bruce Fields 已提交
2833
		*p++ = cpu_to_be32(bcts->dir);
2834
		/* Sorry, we do not yet support RDMA over 4.1: */
J
J. Bruce Fields 已提交
2835
		*p++ = cpu_to_be32(0);
2836 2837 2838 2839
	}
	return nfserr;
}

2840
static __be32
2841
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
L
Linus Torvalds 已提交
2842
{
2843 2844
	struct xdr_stream *xdr = &resp->xdr;

2845
	if (!nfserr)
2846
		nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2847

2848
	return nfserr;
L
Linus Torvalds 已提交
2849 2850 2851
}


2852
static __be32
2853
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
L
Linus Torvalds 已提交
2854
{
2855
	struct xdr_stream *xdr = &resp->xdr;
2856
	__be32 *p;
L
Linus Torvalds 已提交
2857 2858

	if (!nfserr) {
2859 2860 2861
		p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
2862 2863
		p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
						NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
2864
	}
2865
	return nfserr;
L
Linus Torvalds 已提交
2866 2867
}

2868
static __be32
2869
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
L
Linus Torvalds 已提交
2870
{
2871
	struct xdr_stream *xdr = &resp->xdr;
2872
	__be32 *p;
L
Linus Torvalds 已提交
2873 2874

	if (!nfserr) {
2875 2876 2877
		p = xdr_reserve_space(xdr, 32);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
2878
		p = encode_cinfo(p, &create->cr_cinfo);
J
J. Bruce Fields 已提交
2879 2880 2881
		*p++ = cpu_to_be32(2);
		*p++ = cpu_to_be32(create->cr_bmval[0]);
		*p++ = cpu_to_be32(create->cr_bmval[1]);
L
Linus Torvalds 已提交
2882
	}
2883
	return nfserr;
L
Linus Torvalds 已提交
2884 2885
}

2886 2887
static __be32
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
L
Linus Torvalds 已提交
2888 2889
{
	struct svc_fh *fhp = getattr->ga_fhp;
2890
	struct xdr_stream *xdr = &resp->xdr;
L
Linus Torvalds 已提交
2891 2892 2893 2894

	if (nfserr)
		return nfserr;

2895 2896
	nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
				    getattr->ga_bmval,
2897
				    resp->rqstp, 0);
L
Linus Torvalds 已提交
2898 2899 2900
	return nfserr;
}

2901 2902
static __be32
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
L
Linus Torvalds 已提交
2903
{
2904
	struct xdr_stream *xdr = &resp->xdr;
2905
	struct svc_fh *fhp = *fhpp;
L
Linus Torvalds 已提交
2906
	unsigned int len;
2907
	__be32 *p;
L
Linus Torvalds 已提交
2908 2909 2910

	if (!nfserr) {
		len = fhp->fh_handle.fh_size;
2911 2912 2913
		p = xdr_reserve_space(xdr, len + 4);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
2914
		p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
L
Linus Torvalds 已提交
2915
	}
2916
	return nfserr;
L
Linus Torvalds 已提交
2917 2918 2919 2920 2921 2922
}

/*
* Including all fields other than the name, a LOCK4denied structure requires
*   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
*/
2923 2924
static __be32
nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
L
Linus Torvalds 已提交
2925
{
2926
	struct xdr_netobj *conf = &ld->ld_owner;
2927
	__be32 *p;
L
Linus Torvalds 已提交
2928

2929
again:
2930
	p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2931 2932 2933 2934 2935 2936
	if (!p) {
		/*
		 * Don't fail to return the result just because we can't
		 * return the conflicting open:
		 */
		if (conf->len) {
2937
			kfree(conf->data);
2938 2939 2940 2941
			conf->len = 0;
			conf->data = NULL;
			goto again;
		}
2942
		return nfserr_resource;
2943
	}
J
J. Bruce Fields 已提交
2944 2945
	p = xdr_encode_hyper(p, ld->ld_start);
	p = xdr_encode_hyper(p, ld->ld_length);
J
J. Bruce Fields 已提交
2946
	*p++ = cpu_to_be32(ld->ld_type);
2947
	if (conf->len) {
J
J. Bruce Fields 已提交
2948 2949
		p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
		p = xdr_encode_opaque(p, conf->data, conf->len);
2950
		kfree(conf->data);
L
Linus Torvalds 已提交
2951
	}  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
J
J. Bruce Fields 已提交
2952
		p = xdr_encode_hyper(p, (u64)0); /* clientid */
J
J. Bruce Fields 已提交
2953
		*p++ = cpu_to_be32(0); /* length of owner name */
L
Linus Torvalds 已提交
2954
	}
2955
	return nfserr_denied;
L
Linus Torvalds 已提交
2956 2957
}

2958
static __be32
2959
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
L
Linus Torvalds 已提交
2960
{
2961 2962
	struct xdr_stream *xdr = &resp->xdr;

2963
	if (!nfserr)
2964
		nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2965
	else if (nfserr == nfserr_denied)
2966
		nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2967

2968
	return nfserr;
L
Linus Torvalds 已提交
2969 2970
}

2971
static __be32
2972
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
L
Linus Torvalds 已提交
2973
{
2974 2975
	struct xdr_stream *xdr = &resp->xdr;

L
Linus Torvalds 已提交
2976
	if (nfserr == nfserr_denied)
2977
		nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2978
	return nfserr;
L
Linus Torvalds 已提交
2979 2980
}

2981
static __be32
2982
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
L
Linus Torvalds 已提交
2983
{
2984 2985
	struct xdr_stream *xdr = &resp->xdr;

2986
	if (!nfserr)
2987
		nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2988

2989
	return nfserr;
L
Linus Torvalds 已提交
2990 2991 2992
}


2993
static __be32
2994
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
L
Linus Torvalds 已提交
2995
{
2996
	struct xdr_stream *xdr = &resp->xdr;
2997
	__be32 *p;
L
Linus Torvalds 已提交
2998 2999

	if (!nfserr) {
3000 3001 3002
		p = xdr_reserve_space(xdr, 20);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3003
		p = encode_cinfo(p, &link->li_cinfo);
L
Linus Torvalds 已提交
3004
	}
3005
	return nfserr;
L
Linus Torvalds 已提交
3006 3007 3008
}


3009
static __be32
3010
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
L
Linus Torvalds 已提交
3011
{
3012
	struct xdr_stream *xdr = &resp->xdr;
3013
	__be32 *p;
L
Linus Torvalds 已提交
3014 3015 3016 3017

	if (nfserr)
		goto out;

3018 3019 3020 3021 3022 3023
	nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
	if (nfserr)
		goto out;
	p = xdr_reserve_space(xdr, 40);
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
3024
	p = encode_cinfo(p, &open->op_cinfo);
J
J. Bruce Fields 已提交
3025 3026 3027 3028 3029
	*p++ = cpu_to_be32(open->op_rflags);
	*p++ = cpu_to_be32(2);
	*p++ = cpu_to_be32(open->op_bmval[0]);
	*p++ = cpu_to_be32(open->op_bmval[1]);
	*p++ = cpu_to_be32(open->op_delegate_type);
L
Linus Torvalds 已提交
3030 3031 3032 3033 3034

	switch (open->op_delegate_type) {
	case NFS4_OPEN_DELEGATE_NONE:
		break;
	case NFS4_OPEN_DELEGATE_READ:
3035 3036 3037 3038 3039 3040
		nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
		if (nfserr)
			return nfserr;
		p = xdr_reserve_space(xdr, 20);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3041
		*p++ = cpu_to_be32(open->op_recall);
L
Linus Torvalds 已提交
3042 3043 3044 3045

		/*
		 * TODO: ACE's in delegations
		 */
J
J. Bruce Fields 已提交
3046 3047 3048 3049
		*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);   /* XXX: is NULL principal ok? */
L
Linus Torvalds 已提交
3050 3051
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
3052 3053 3054 3055 3056 3057
		nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
		if (nfserr)
			return nfserr;
		p = xdr_reserve_space(xdr, 32);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3058
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
3059 3060 3061 3062

		/*
		 * TODO: space_limit's in delegations
		 */
J
J. Bruce Fields 已提交
3063 3064 3065
		*p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
		*p++ = cpu_to_be32(~(u32)0);
		*p++ = cpu_to_be32(~(u32)0);
L
Linus Torvalds 已提交
3066 3067 3068 3069

		/*
		 * TODO: ACE's in delegations
		 */
J
J. Bruce Fields 已提交
3070 3071 3072 3073
		*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);   /* XXX: is NULL principal ok? */
L
Linus Torvalds 已提交
3074
		break;
3075 3076 3077 3078
	case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
		switch (open->op_why_no_deleg) {
		case WND4_CONTENTION:
		case WND4_RESOURCE:
3079 3080 3081
			p = xdr_reserve_space(xdr, 8);
			if (!p)
				return nfserr_resource;
J
J. Bruce Fields 已提交
3082 3083 3084
			*p++ = cpu_to_be32(open->op_why_no_deleg);
			/* deleg signaling not supported yet: */
			*p++ = cpu_to_be32(0);
3085 3086
			break;
		default:
3087 3088 3089
			p = xdr_reserve_space(xdr, 4);
			if (!p)
				return nfserr_resource;
J
J. Bruce Fields 已提交
3090
			*p++ = cpu_to_be32(open->op_why_no_deleg);
3091 3092
		}
		break;
L
Linus Torvalds 已提交
3093 3094 3095 3096 3097
	default:
		BUG();
	}
	/* XXX save filehandle here */
out:
3098
	return nfserr;
L
Linus Torvalds 已提交
3099 3100
}

3101
static __be32
3102
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
L
Linus Torvalds 已提交
3103
{
3104 3105
	struct xdr_stream *xdr = &resp->xdr;

3106
	if (!nfserr)
3107
		nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
L
Linus Torvalds 已提交
3108

3109
	return nfserr;
L
Linus Torvalds 已提交
3110 3111
}

3112
static __be32
3113
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
L
Linus Torvalds 已提交
3114
{
3115 3116
	struct xdr_stream *xdr = &resp->xdr;

3117
	if (!nfserr)
3118
		nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
L
Linus Torvalds 已提交
3119

3120
	return nfserr;
L
Linus Torvalds 已提交
3121 3122
}

3123 3124 3125 3126
static __be32 nfsd4_encode_splice_read(
				struct nfsd4_compoundres *resp,
				struct nfsd4_read *read,
				struct file *file, unsigned long maxcount)
L
Linus Torvalds 已提交
3127
{
3128
	struct xdr_stream *xdr = &resp->xdr;
J
J. Bruce Fields 已提交
3129
	struct xdr_buf *buf = xdr->buf;
3130
	u32 eof;
3131
	int space_left;
3132
	__be32 nfserr;
3133
	__be32 *p = xdr->p - 2;
L
Linus Torvalds 已提交
3134

3135 3136
	/* Make sure there will be room for padding if needed */
	if (xdr->end - xdr->p < 1)
3137
		return nfserr_resource;
3138 3139 3140 3141 3142 3143 3144 3145 3146

	nfserr = nfsd_splice_read(read->rd_rqstp, file,
				  read->rd_offset, &maxcount);
	if (nfserr) {
		/*
		 * nfsd_splice_actor may have already messed with the
		 * page length; reset it so as not to confuse
		 * xdr_truncate_encode:
		 */
J
J. Bruce Fields 已提交
3147
		buf->page_len = 0;
3148
		return nfserr;
3149
	}
L
Linus Torvalds 已提交
3150

3151 3152
	eof = (read->rd_offset + maxcount >=
	       read->rd_fhp->fh_dentry->d_inode->i_size);
3153

3154 3155
	*(p++) = htonl(eof);
	*(p++) = htonl(maxcount);
3156

J
J. Bruce Fields 已提交
3157 3158
	buf->page_len = maxcount;
	buf->len += maxcount;
3159 3160
	xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
							/ PAGE_SIZE;
3161 3162

	/* Use rest of head for padding and remaining ops: */
J
J. Bruce Fields 已提交
3163 3164
	buf->tail[0].iov_base = xdr->p;
	buf->tail[0].iov_len = 0;
3165
	xdr->iov = buf->tail;
3166
	if (maxcount&3) {
3167 3168 3169 3170
		int pad = 4 - (maxcount&3);

		*(xdr->p++) = 0;

J
J. Bruce Fields 已提交
3171
		buf->tail[0].iov_base += maxcount&3;
3172 3173
		buf->tail[0].iov_len = pad;
		buf->len += pad;
3174
	}
3175

3176
	space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
J
J. Bruce Fields 已提交
3177 3178
				buf->buflen - buf->len);
	buf->buflen = buf->len + space_left;
3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192
	xdr->end = (__be32 *)((void *)xdr->end + space_left);

	return 0;
}

static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
				 struct nfsd4_read *read,
				 struct file *file, unsigned long maxcount)
{
	struct xdr_stream *xdr = &resp->xdr;
	u32 eof;
	int v;
	int starting_len = xdr->buf->len - 8;
	long len;
3193
	int thislen;
3194 3195 3196
	__be32 nfserr;
	__be32 tmp;
	__be32 *p;
3197 3198
	u32 zzz = 0;
	int pad;
L
Linus Torvalds 已提交
3199 3200 3201

	len = maxcount;
	v = 0;
3202

3203
	thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3204 3205 3206 3207 3208 3209 3210 3211
	p = xdr_reserve_space(xdr, (thislen+3)&~3);
	WARN_ON_ONCE(!p);
	resp->rqstp->rq_vec[v].iov_base = p;
	resp->rqstp->rq_vec[v].iov_len = thislen;
	v++;
	len -= thislen;

	while (len) {
3212
		thislen = min_t(long, len, PAGE_SIZE);
3213 3214 3215
		p = xdr_reserve_space(xdr, (thislen+3)&~3);
		WARN_ON_ONCE(!p);
		resp->rqstp->rq_vec[v].iov_base = p;
3216
		resp->rqstp->rq_vec[v].iov_len = thislen;
L
Linus Torvalds 已提交
3217
		v++;
3218
		len -= thislen;
L
Linus Torvalds 已提交
3219 3220 3221
	}
	read->rd_vlen = v;

3222 3223 3224
	nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
			read->rd_vlen, &maxcount);
	if (nfserr)
L
Linus Torvalds 已提交
3225
		return nfserr;
3226
	xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3227

3228 3229
	eof = (read->rd_offset + maxcount >=
	       read->rd_fhp->fh_dentry->d_inode->i_size);
L
Linus Torvalds 已提交
3230

3231 3232 3233 3234 3235
	tmp = htonl(eof);
	write_bytes_to_xdr_buf(xdr->buf, starting_len    , &tmp, 4);
	tmp = htonl(maxcount);
	write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);

3236 3237 3238
	pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
	write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
								&zzz, pad);
L
Linus Torvalds 已提交
3239
	return 0;
3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259

}

static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
		  struct nfsd4_read *read)
{
	unsigned long maxcount;
	struct xdr_stream *xdr = &resp->xdr;
	struct file *file = read->rd_filp;
	int starting_len = xdr->buf->len;
	struct raparms *ra;
	__be32 *p;
	__be32 err;

	if (nfserr)
		return nfserr;

	p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
	if (!p) {
3260
		WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3261 3262
		return nfserr_resource;
	}
3263
	if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3264
		WARN_ON_ONCE(1);
3265 3266 3267 3268 3269
		return nfserr_resource;
	}
	xdr_commit_encode(xdr);

	maxcount = svc_max_payload(resp->rqstp);
3270 3271
	maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
	maxcount = min_t(unsigned long, maxcount, read->rd_length);
3272 3273 3274 3275 3276 3277 3278 3279

	if (!read->rd_filp) {
		err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
						&file, &ra);
		if (err)
			goto err_truncate;
	}

3280
	if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291
		err = nfsd4_encode_splice_read(resp, read, file, maxcount);
	else
		err = nfsd4_encode_readv(resp, read, file, maxcount);

	if (!read->rd_filp)
		nfsd_put_tmp_read_open(file, ra);

err_truncate:
	if (err)
		xdr_truncate_encode(xdr, starting_len);
	return err;
L
Linus Torvalds 已提交
3292 3293
}

3294 3295
static __be32
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
L
Linus Torvalds 已提交
3296 3297
{
	int maxcount;
3298 3299
	__be32 wire_count;
	int zero = 0;
3300
	struct xdr_stream *xdr = &resp->xdr;
J
J. Bruce Fields 已提交
3301
	int length_offset = xdr->buf->len;
3302
	__be32 *p;
L
Linus Torvalds 已提交
3303 3304 3305

	if (nfserr)
		return nfserr;
3306 3307 3308 3309

	p = xdr_reserve_space(xdr, 4);
	if (!p)
		return nfserr_resource;
L
Linus Torvalds 已提交
3310
	maxcount = PAGE_SIZE;
3311

3312 3313
	p = xdr_reserve_space(xdr, maxcount);
	if (!p)
3314
		return nfserr_resource;
L
Linus Torvalds 已提交
3315 3316 3317 3318 3319 3320
	/*
	 * XXX: By default, the ->readlink() VFS op will truncate symlinks
	 * if they would overflow the buffer.  Is this kosher in NFSv4?  If
	 * not, one easy fix is: if ->readlink() precisely fills the buffer,
	 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
	 */
3321 3322
	nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
						(char *)p, &maxcount);
L
Linus Torvalds 已提交
3323
	if (nfserr == nfserr_isdir)
3324 3325
		nfserr = nfserr_inval;
	if (nfserr) {
J
J. Bruce Fields 已提交
3326
		xdr_truncate_encode(xdr, length_offset);
L
Linus Torvalds 已提交
3327
		return nfserr;
3328
	}
L
Linus Torvalds 已提交
3329

3330 3331
	wire_count = htonl(maxcount);
	write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3332
	xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3333 3334 3335
	if (maxcount & 3)
		write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
						&zero, 4 - (maxcount&3));
L
Linus Torvalds 已提交
3336 3337 3338
	return 0;
}

3339 3340
static __be32
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
L
Linus Torvalds 已提交
3341 3342
{
	int maxcount;
J
J. Bruce Fields 已提交
3343
	int bytes_left;
L
Linus Torvalds 已提交
3344
	loff_t offset;
J
J. Bruce Fields 已提交
3345
	__be64 wire_offset;
3346
	struct xdr_stream *xdr = &resp->xdr;
J
J. Bruce Fields 已提交
3347
	int starting_len = xdr->buf->len;
3348
	__be32 *p;
L
Linus Torvalds 已提交
3349 3350 3351 3352

	if (nfserr)
		return nfserr;

3353 3354 3355
	p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
	if (!p)
		return nfserr_resource;
L
Linus Torvalds 已提交
3356 3357

	/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
J
J. Bruce Fields 已提交
3358 3359
	*p++ = cpu_to_be32(0);
	*p++ = cpu_to_be32(0);
3360 3361
	resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
				- (char *)resp->xdr.buf->head[0].iov_base;
L
Linus Torvalds 已提交
3362 3363

	/*
J
J. Bruce Fields 已提交
3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377
	 * Number of bytes left for directory entries allowing for the
	 * final 8 bytes of the readdir and a following failed op:
	 */
	bytes_left = xdr->buf->buflen - xdr->buf->len
			- COMPOUND_ERR_SLACK_SPACE - 8;
	if (bytes_left < 0) {
		nfserr = nfserr_resource;
		goto err_no_verf;
	}
	maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
	/*
	 * Note the rfc defines rd_maxcount as the size of the
	 * READDIR4resok structure, which includes the verifier above
	 * and the 8 bytes encoded at the end of this function:
L
Linus Torvalds 已提交
3378
	 */
J
J. Bruce Fields 已提交
3379 3380
	if (maxcount < 16) {
		nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
3381 3382
		goto err_no_verf;
	}
J
J. Bruce Fields 已提交
3383
	maxcount = min_t(int, maxcount-16, bytes_left);
L
Linus Torvalds 已提交
3384

3385 3386 3387 3388
	/* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
	if (!readdir->rd_dircount)
		readdir->rd_dircount = INT_MAX;

J
J. Bruce Fields 已提交
3389 3390
	readdir->xdr = xdr;
	readdir->rd_maxcount = maxcount;
L
Linus Torvalds 已提交
3391
	readdir->common.err = 0;
J
J. Bruce Fields 已提交
3392
	readdir->cookie_offset = 0;
L
Linus Torvalds 已提交
3393 3394 3395 3396 3397 3398 3399

	offset = readdir->rd_cookie;
	nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
			      &offset,
			      &readdir->common, nfsd4_encode_dirent);
	if (nfserr == nfs_ok &&
	    readdir->common.err == nfserr_toosmall &&
J
J. Bruce Fields 已提交
3400 3401 3402 3403 3404 3405 3406 3407 3408
	    xdr->buf->len == starting_len + 8) {
		/* nothing encoded; which limit did we hit?: */
		if (maxcount - 16 < bytes_left)
			/* It was the fault of rd_maxcount: */
			nfserr = nfserr_toosmall;
		else
			/* We ran out of buffer space: */
			nfserr = nfserr_resource;
	}
L
Linus Torvalds 已提交
3409 3410 3411
	if (nfserr)
		goto err_no_verf;

J
J. Bruce Fields 已提交
3412 3413 3414 3415 3416
	if (readdir->cookie_offset) {
		wire_offset = cpu_to_be64(offset);
		write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
							&wire_offset, 8);
	}
L
Linus Torvalds 已提交
3417

J
J. Bruce Fields 已提交
3418 3419 3420 3421 3422
	p = xdr_reserve_space(xdr, 8);
	if (!p) {
		WARN_ON_ONCE(1);
		goto err_no_verf;
	}
L
Linus Torvalds 已提交
3423 3424 3425 3426 3427
	*p++ = 0;	/* no more entries */
	*p++ = htonl(readdir->common.err == nfserr_eof);

	return 0;
err_no_verf:
J
J. Bruce Fields 已提交
3428
	xdr_truncate_encode(xdr, starting_len);
L
Linus Torvalds 已提交
3429 3430 3431
	return nfserr;
}

3432
static __be32
3433
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
L
Linus Torvalds 已提交
3434
{
3435
	struct xdr_stream *xdr = &resp->xdr;
3436
	__be32 *p;
L
Linus Torvalds 已提交
3437 3438

	if (!nfserr) {
3439 3440 3441
		p = xdr_reserve_space(xdr, 20);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3442
		p = encode_cinfo(p, &remove->rm_cinfo);
L
Linus Torvalds 已提交
3443
	}
3444
	return nfserr;
L
Linus Torvalds 已提交
3445 3446
}

3447
static __be32
3448
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
L
Linus Torvalds 已提交
3449
{
3450
	struct xdr_stream *xdr = &resp->xdr;
3451
	__be32 *p;
L
Linus Torvalds 已提交
3452 3453

	if (!nfserr) {
3454 3455 3456
		p = xdr_reserve_space(xdr, 40);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3457 3458
		p = encode_cinfo(p, &rename->rn_sinfo);
		p = encode_cinfo(p, &rename->rn_tinfo);
L
Linus Torvalds 已提交
3459
	}
3460
	return nfserr;
L
Linus Torvalds 已提交
3461 3462
}

3463
static __be32
3464
nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3465
			 __be32 nfserr, struct svc_export *exp)
A
Andy Adamson 已提交
3466
{
3467
	u32 i, nflavs, supported;
3468 3469
	struct exp_flavor_info *flavs;
	struct exp_flavor_info def_flavs[2];
3470 3471
	__be32 *p, *flavorsp;
	static bool report = true;
A
Andy Adamson 已提交
3472 3473 3474

	if (nfserr)
		goto out;
3475
	nfserr = nfserr_resource;
3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495
	if (exp->ex_nflavors) {
		flavs = exp->ex_flavors;
		nflavs = exp->ex_nflavors;
	} else { /* Handling of some defaults in absence of real secinfo: */
		flavs = def_flavs;
		if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
			nflavs = 2;
			flavs[0].pseudoflavor = RPC_AUTH_UNIX;
			flavs[1].pseudoflavor = RPC_AUTH_NULL;
		} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
			nflavs = 1;
			flavs[0].pseudoflavor
					= svcauth_gss_flavor(exp->ex_client);
		} else {
			nflavs = 1;
			flavs[0].pseudoflavor
					= exp->ex_client->flavour->flavour;
		}
	}

3496
	supported = 0;
3497 3498 3499
	p = xdr_reserve_space(xdr, 4);
	if (!p)
		goto out;
3500 3501
	flavorsp = p++;		/* to be backfilled later */

3502
	for (i = 0; i < nflavs; i++) {
3503
		rpc_authflavor_t pf = flavs[i].pseudoflavor;
3504
		struct rpcsec_gss_info info;
A
Andy Adamson 已提交
3505

3506 3507
		if (rpcauth_get_gssinfo(pf, &info) == 0) {
			supported++;
3508 3509 3510 3511
			p = xdr_reserve_space(xdr, 4 + 4 +
					      XDR_LEN(info.oid.len) + 4 + 4);
			if (!p)
				goto out;
J
J. Bruce Fields 已提交
3512
			*p++ = cpu_to_be32(RPC_AUTH_GSS);
J
J. Bruce Fields 已提交
3513
			p = xdr_encode_opaque(p,  info.oid.data, info.oid.len);
J
J. Bruce Fields 已提交
3514 3515
			*p++ = cpu_to_be32(info.qop);
			*p++ = cpu_to_be32(info.service);
3516 3517
		} else if (pf < RPC_AUTH_MAXFLAVOR) {
			supported++;
3518 3519 3520
			p = xdr_reserve_space(xdr, 4);
			if (!p)
				goto out;
J
J. Bruce Fields 已提交
3521
			*p++ = cpu_to_be32(pf);
3522 3523 3524 3525
		} else {
			if (report)
				pr_warn("NFS: SECINFO: security flavor %u "
					"is not supported\n", pf);
A
Andy Adamson 已提交
3526 3527
		}
	}
3528

3529 3530 3531
	if (nflavs != supported)
		report = false;
	*flavorsp = htonl(supported);
3532
	nfserr = 0;
A
Andy Adamson 已提交
3533 3534 3535
out:
	if (exp)
		exp_put(exp);
3536
	return nfserr;
A
Andy Adamson 已提交
3537 3538
}

3539 3540 3541 3542
static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo *secinfo)
{
3543 3544 3545
	struct xdr_stream *xdr = &resp->xdr;

	return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3546 3547 3548 3549 3550 3551
}

static __be32
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo_no_name *secinfo)
{
3552 3553 3554
	struct xdr_stream *xdr = &resp->xdr;

	return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3555 3556
}

L
Linus Torvalds 已提交
3557 3558 3559 3560
/*
 * The SETATTR encode routine is special -- it always encodes a bitmap,
 * regardless of the error status.
 */
3561
static __be32
3562
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
L
Linus Torvalds 已提交
3563
{
3564
	struct xdr_stream *xdr = &resp->xdr;
3565
	__be32 *p;
L
Linus Torvalds 已提交
3566

3567 3568 3569
	p = xdr_reserve_space(xdr, 16);
	if (!p)
		return nfserr_resource;
L
Linus Torvalds 已提交
3570
	if (nfserr) {
J
J. Bruce Fields 已提交
3571 3572 3573 3574
		*p++ = cpu_to_be32(3);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
3575 3576
	}
	else {
J
J. Bruce Fields 已提交
3577 3578 3579 3580
		*p++ = cpu_to_be32(3);
		*p++ = cpu_to_be32(setattr->sa_bmval[0]);
		*p++ = cpu_to_be32(setattr->sa_bmval[1]);
		*p++ = cpu_to_be32(setattr->sa_bmval[2]);
L
Linus Torvalds 已提交
3581
	}
3582
	return nfserr;
L
Linus Torvalds 已提交
3583 3584
}

3585
static __be32
3586
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
L
Linus Torvalds 已提交
3587
{
3588
	struct xdr_stream *xdr = &resp->xdr;
3589
	__be32 *p;
L
Linus Torvalds 已提交
3590 3591

	if (!nfserr) {
3592 3593 3594
		p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3595 3596 3597
		p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
		p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
						NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3598 3599
	}
	else if (nfserr == nfserr_clid_inuse) {
3600 3601 3602
		p = xdr_reserve_space(xdr, 8);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3603 3604
		*p++ = cpu_to_be32(0);
		*p++ = cpu_to_be32(0);
L
Linus Torvalds 已提交
3605
	}
3606
	return nfserr;
L
Linus Torvalds 已提交
3607 3608
}

3609
static __be32
3610
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
L
Linus Torvalds 已提交
3611
{
3612
	struct xdr_stream *xdr = &resp->xdr;
3613
	__be32 *p;
L
Linus Torvalds 已提交
3614 3615

	if (!nfserr) {
3616 3617 3618
		p = xdr_reserve_space(xdr, 16);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3619 3620
		*p++ = cpu_to_be32(write->wr_bytes_written);
		*p++ = cpu_to_be32(write->wr_how_written);
J
J. Bruce Fields 已提交
3621 3622
		p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
							NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3623
	}
3624
	return nfserr;
L
Linus Torvalds 已提交
3625 3626
}

3627 3628 3629 3630 3631 3632 3633 3634
static const u32 nfs4_minimal_spo_must_enforce[2] = {
	[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
	      1 << (OP_EXCHANGE_ID - 32) |
	      1 << (OP_CREATE_SESSION - 32) |
	      1 << (OP_DESTROY_SESSION - 32) |
	      1 << (OP_DESTROY_CLIENTID - 32)
};

A
Andy Adamson 已提交
3635
static __be32
J
J. Bruce Fields 已提交
3636
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3637 3638
			 struct nfsd4_exchange_id *exid)
{
3639
	struct xdr_stream *xdr = &resp->xdr;
3640
	__be32 *p;
A
Andy Adamson 已提交
3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654
	char *major_id;
	char *server_scope;
	int major_id_sz;
	int server_scope_sz;
	uint64_t minor_id = 0;

	if (nfserr)
		return nfserr;

	major_id = utsname()->nodename;
	major_id_sz = strlen(major_id);
	server_scope = utsname()->nodename;
	server_scope_sz = strlen(server_scope);

3655
	p = xdr_reserve_space(xdr,
A
Andy Adamson 已提交
3656 3657 3658
		8 /* eir_clientid */ +
		4 /* eir_sequenceid */ +
		4 /* eir_flags */ +
3659
		4 /* spr_how */);
3660 3661
	if (!p)
		return nfserr_resource;
A
Andy Adamson 已提交
3662

J
J. Bruce Fields 已提交
3663
	p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
J
J. Bruce Fields 已提交
3664 3665
	*p++ = cpu_to_be32(exid->seqid);
	*p++ = cpu_to_be32(exid->flags);
A
Andy Adamson 已提交
3666

J
J. Bruce Fields 已提交
3667
	*p++ = cpu_to_be32(exid->spa_how);
3668

3669 3670 3671 3672
	switch (exid->spa_how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
3673
		/* spo_must_enforce, spo_must_allow */
3674 3675 3676
		p = xdr_reserve_space(xdr, 16);
		if (!p)
			return nfserr_resource;
3677

3678
		/* spo_must_enforce bitmap: */
J
J. Bruce Fields 已提交
3679 3680 3681
		*p++ = cpu_to_be32(2);
		*p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
		*p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3682
		/* empty spo_must_allow bitmap: */
J
J. Bruce Fields 已提交
3683
		*p++ = cpu_to_be32(0);
3684

3685 3686 3687 3688
		break;
	default:
		WARN_ON_ONCE(1);
	}
A
Andy Adamson 已提交
3689

3690
	p = xdr_reserve_space(xdr,
3691 3692 3693 3694 3695 3696
		8 /* so_minor_id */ +
		4 /* so_major_id.len */ +
		(XDR_QUADLEN(major_id_sz) * 4) +
		4 /* eir_server_scope.len */ +
		(XDR_QUADLEN(server_scope_sz) * 4) +
		4 /* eir_server_impl_id.count (0) */);
3697 3698
	if (!p)
		return nfserr_resource;
3699

A
Andy Adamson 已提交
3700
	/* The server_owner struct */
J
J. Bruce Fields 已提交
3701
	p = xdr_encode_hyper(p, minor_id);      /* Minor id */
A
Andy Adamson 已提交
3702
	/* major id */
J
J. Bruce Fields 已提交
3703
	p = xdr_encode_opaque(p, major_id, major_id_sz);
A
Andy Adamson 已提交
3704 3705

	/* Server scope */
J
J. Bruce Fields 已提交
3706
	p = xdr_encode_opaque(p, server_scope, server_scope_sz);
A
Andy Adamson 已提交
3707 3708

	/* Implementation id */
J
J. Bruce Fields 已提交
3709
	*p++ = cpu_to_be32(0);	/* zero length nfs_impl_id4 array */
A
Andy Adamson 已提交
3710
	return 0;
A
Andy Adamson 已提交
3711 3712 3713
}

static __be32
J
J. Bruce Fields 已提交
3714
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3715 3716
			    struct nfsd4_create_session *sess)
{
3717
	struct xdr_stream *xdr = &resp->xdr;
3718
	__be32 *p;
A
Andy Adamson 已提交
3719 3720 3721 3722

	if (nfserr)
		return nfserr;

3723 3724 3725
	p = xdr_reserve_space(xdr, 24);
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
3726 3727
	p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
					NFS4_MAX_SESSIONID_LEN);
J
J. Bruce Fields 已提交
3728 3729
	*p++ = cpu_to_be32(sess->seqid);
	*p++ = cpu_to_be32(sess->flags);
A
Andy Adamson 已提交
3730

3731 3732 3733
	p = xdr_reserve_space(xdr, 28);
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
3734 3735 3736 3737 3738 3739 3740
	*p++ = cpu_to_be32(0); /* headerpadsz */
	*p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
	*p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
	*p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
	*p++ = cpu_to_be32(sess->fore_channel.maxops);
	*p++ = cpu_to_be32(sess->fore_channel.maxreqs);
	*p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
A
Andy Adamson 已提交
3741 3742

	if (sess->fore_channel.nr_rdma_attrs) {
3743 3744 3745
		p = xdr_reserve_space(xdr, 4);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3746
		*p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
A
Andy Adamson 已提交
3747 3748
	}

3749 3750 3751
	p = xdr_reserve_space(xdr, 28);
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
3752 3753 3754 3755 3756 3757 3758
	*p++ = cpu_to_be32(0); /* headerpadsz */
	*p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
	*p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
	*p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
	*p++ = cpu_to_be32(sess->back_channel.maxops);
	*p++ = cpu_to_be32(sess->back_channel.maxreqs);
	*p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
A
Andy Adamson 已提交
3759 3760

	if (sess->back_channel.nr_rdma_attrs) {
3761 3762 3763
		p = xdr_reserve_space(xdr, 4);
		if (!p)
			return nfserr_resource;
J
J. Bruce Fields 已提交
3764
		*p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
A
Andy Adamson 已提交
3765 3766
	}
	return 0;
A
Andy Adamson 已提交
3767 3768
}

D
Daniel Mack 已提交
3769
static __be32
J
J. Bruce Fields 已提交
3770
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3771 3772
		      struct nfsd4_sequence *seq)
{
3773
	struct xdr_stream *xdr = &resp->xdr;
3774
	__be32 *p;
B
Benny Halevy 已提交
3775 3776 3777 3778

	if (nfserr)
		return nfserr;

3779 3780 3781
	p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
	if (!p)
		return nfserr_resource;
J
J. Bruce Fields 已提交
3782 3783
	p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
					NFS4_MAX_SESSIONID_LEN);
J
J. Bruce Fields 已提交
3784 3785
	*p++ = cpu_to_be32(seq->seqid);
	*p++ = cpu_to_be32(seq->slotid);
3786
	/* Note slotid's are numbered from zero: */
J
J. Bruce Fields 已提交
3787 3788 3789
	*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
	*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
	*p++ = cpu_to_be32(seq->status_flags);
B
Benny Halevy 已提交
3790

3791
	resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
B
Benny Halevy 已提交
3792
	return 0;
A
Andy Adamson 已提交
3793 3794
}

J
J. Bruce Fields 已提交
3795
static __be32
J
J. Bruce Fields 已提交
3796
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3797 3798
			  struct nfsd4_test_stateid *test_stateid)
{
3799
	struct xdr_stream *xdr = &resp->xdr;
3800
	struct nfsd4_test_stateid_id *stateid, *next;
3801 3802
	__be32 *p;

3803 3804 3805
	if (nfserr)
		return nfserr;

3806 3807 3808
	p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
	if (!p)
		return nfserr_resource;
3809 3810
	*p++ = htonl(test_stateid->ts_num_ids);

3811
	list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3812
		*p++ = stateid->ts_id_status;
3813 3814 3815 3816 3817
	}

	return nfserr;
}

A
Anna Schumaker 已提交
3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833
static __be32
nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
		  struct nfsd4_seek *seek)
{
	__be32 *p;

	if (nfserr)
		return nfserr;

	p = xdr_reserve_space(&resp->xdr, 4 + 8);
	*p++ = cpu_to_be32(seek->seek_eof);
	p = xdr_encode_hyper(p, seek->seek_pos);

	return nfserr;
}

3834 3835 3836 3837 3838 3839 3840 3841
static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
	return nfserr;
}

typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);

A
Andy Adamson 已提交
3842 3843 3844 3845 3846
/*
 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
 * since we don't need to filter out obsolete ops as this is
 * done in the decoding phase.
 */
3847
static nfsd4_enc nfsd4_enc_ops[] = {
3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863
	[OP_ACCESS]		= (nfsd4_enc)nfsd4_encode_access,
	[OP_CLOSE]		= (nfsd4_enc)nfsd4_encode_close,
	[OP_COMMIT]		= (nfsd4_enc)nfsd4_encode_commit,
	[OP_CREATE]		= (nfsd4_enc)nfsd4_encode_create,
	[OP_DELEGPURGE]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DELEGRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETATTR]		= (nfsd4_enc)nfsd4_encode_getattr,
	[OP_GETFH]		= (nfsd4_enc)nfsd4_encode_getfh,
	[OP_LINK]		= (nfsd4_enc)nfsd4_encode_link,
	[OP_LOCK]		= (nfsd4_enc)nfsd4_encode_lock,
	[OP_LOCKT]		= (nfsd4_enc)nfsd4_encode_lockt,
	[OP_LOCKU]		= (nfsd4_enc)nfsd4_encode_locku,
	[OP_LOOKUP]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LOOKUPP]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_NVERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_OPEN]		= (nfsd4_enc)nfsd4_encode_open,
3864
	[OP_OPENATTR]		= (nfsd4_enc)nfsd4_encode_noop,
3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884
	[OP_OPEN_CONFIRM]	= (nfsd4_enc)nfsd4_encode_open_confirm,
	[OP_OPEN_DOWNGRADE]	= (nfsd4_enc)nfsd4_encode_open_downgrade,
	[OP_PUTFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_PUTPUBFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_PUTROOTFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_READ]		= (nfsd4_enc)nfsd4_encode_read,
	[OP_READDIR]		= (nfsd4_enc)nfsd4_encode_readdir,
	[OP_READLINK]		= (nfsd4_enc)nfsd4_encode_readlink,
	[OP_REMOVE]		= (nfsd4_enc)nfsd4_encode_remove,
	[OP_RENAME]		= (nfsd4_enc)nfsd4_encode_rename,
	[OP_RENEW]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RESTOREFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_SAVEFH]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_SECINFO]		= (nfsd4_enc)nfsd4_encode_secinfo,
	[OP_SETATTR]		= (nfsd4_enc)nfsd4_encode_setattr,
	[OP_SETCLIENTID]	= (nfsd4_enc)nfsd4_encode_setclientid,
	[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
	[OP_VERIFY]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_WRITE]		= (nfsd4_enc)nfsd4_encode_write,
	[OP_RELEASE_LOCKOWNER]	= (nfsd4_enc)nfsd4_encode_noop,
A
Andy Adamson 已提交
3885 3886 3887

	/* NFSv4.1 operations */
	[OP_BACKCHANNEL_CTL]	= (nfsd4_enc)nfsd4_encode_noop,
3888
	[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
A
Andy Adamson 已提交
3889 3890
	[OP_EXCHANGE_ID]	= (nfsd4_enc)nfsd4_encode_exchange_id,
	[OP_CREATE_SESSION]	= (nfsd4_enc)nfsd4_encode_create_session,
3891 3892
	[OP_DESTROY_SESSION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_FREE_STATEID]	= (nfsd4_enc)nfsd4_encode_noop,
A
Andy Adamson 已提交
3893 3894 3895 3896 3897 3898
	[OP_GET_DIR_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETDEVICEINFO]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_GETDEVICELIST]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTCOMMIT]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTGET]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTRETURN]	= (nfsd4_enc)nfsd4_encode_noop,
3899
	[OP_SECINFO_NO_NAME]	= (nfsd4_enc)nfsd4_encode_secinfo_no_name,
A
Andy Adamson 已提交
3900 3901
	[OP_SEQUENCE]		= (nfsd4_enc)nfsd4_encode_sequence,
	[OP_SET_SSV]		= (nfsd4_enc)nfsd4_encode_noop,
3902
	[OP_TEST_STATEID]	= (nfsd4_enc)nfsd4_encode_test_stateid,
A
Andy Adamson 已提交
3903 3904 3905
	[OP_WANT_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DESTROY_CLIENTID]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RECLAIM_COMPLETE]	= (nfsd4_enc)nfsd4_encode_noop,
3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917

	/* NFSv4.2 operations */
	[OP_ALLOCATE]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_COPY]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_COPY_NOTIFY]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DEALLOCATE]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_IO_ADVISE]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTERROR]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_LAYOUTSTATS]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_OFFLOAD_CANCEL]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_OFFLOAD_STATUS]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_READ_PLUS]		= (nfsd4_enc)nfsd4_encode_noop,
A
Anna Schumaker 已提交
3918
	[OP_SEEK]		= (nfsd4_enc)nfsd4_encode_seek,
3919
	[OP_WRITE_SAME]		= (nfsd4_enc)nfsd4_encode_noop,
3920 3921
};

3922
/*
J
J. Bruce Fields 已提交
3923 3924 3925 3926 3927 3928
 * Calculate whether we still have space to encode repsize bytes.
 * There are two considerations:
 *     - For NFS versions >=4.1, the size of the reply must stay within
 *       session limits
 *     - For all NFS versions, we must stay within limited preallocated
 *       buffer space.
3929
 *
J
J. Bruce Fields 已提交
3930 3931 3932 3933
 * This is called before the operation is processed, so can only provide
 * an upper estimate.  For some nonidempotent operations (such as
 * getattr), it's not necessarily a problem if that estimate is wrong,
 * as we can fail it after processing without significant side effects.
3934
 */
J
J. Bruce Fields 已提交
3935
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3936
{
3937
	struct xdr_buf *buf = &resp->rqstp->rq_res;
3938
	struct nfsd4_slot *slot = resp->cstate.slot;
3939

3940 3941 3942
	if (buf->len + respsize <= buf->buflen)
		return nfs_ok;
	if (!nfsd4_has_session(&resp->cstate))
3943
		return nfserr_resource;
3944 3945 3946
	if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
		WARN_ON_ONCE(1);
		return nfserr_rep_too_big_to_cache;
3947
	}
3948
	return nfserr_rep_too_big;
3949 3950
}

L
Linus Torvalds 已提交
3951 3952 3953
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
3954
	struct xdr_stream *xdr = &resp->xdr;
3955
	struct nfs4_stateowner *so = resp->cstate.replay_owner;
3956
	struct svc_rqst *rqstp = resp->rqstp;
3957
	int post_err_offset;
3958
	nfsd4_enc encoder;
3959
	__be32 *p;
L
Linus Torvalds 已提交
3960

3961 3962 3963 3964 3965
	p = xdr_reserve_space(xdr, 8);
	if (!p) {
		WARN_ON_ONCE(1);
		return;
	}
J
J. Bruce Fields 已提交
3966
	*p++ = cpu_to_be32(op->opnum);
3967
	post_err_offset = xdr->buf->len;
L
Linus Torvalds 已提交
3968

3969 3970 3971 3972
	if (op->opnum == OP_ILLEGAL)
		goto status;
	BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
	       !nfsd4_enc_ops[op->opnum]);
3973 3974
	encoder = nfsd4_enc_ops[op->opnum];
	op->status = encoder(resp, op->status, &op->u);
3975 3976
	xdr_commit_encode(xdr);

3977
	/* nfsd4_check_resp_size guarantees enough room for error status */
3978 3979 3980 3981 3982 3983
	if (!op->status) {
		int space_needed = 0;
		if (!nfsd4_last_compound_op(rqstp))
			space_needed = COMPOUND_ERR_SLACK_SPACE;
		op->status = nfsd4_check_resp_size(resp, space_needed);
	}
3984 3985 3986 3987 3988 3989 3990 3991
	if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
		struct nfsd4_slot *slot = resp->cstate.slot;

		if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
			op->status = nfserr_rep_too_big_to_cache;
		else
			op->status = nfserr_rep_too_big;
	}
3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002
	if (op->status == nfserr_resource ||
	    op->status == nfserr_rep_too_big ||
	    op->status == nfserr_rep_too_big_to_cache) {
		/*
		 * The operation may have already been encoded or
		 * partially encoded.  No op returns anything additional
		 * in the case of one of these three errors, so we can
		 * just truncate back to after the status.  But it's a
		 * bug if we had to do this on a non-idempotent op:
		 */
		warn_on_nonidempotent_op(op);
4003
		xdr_truncate_encode(xdr, post_err_offset);
4004
	}
4005
	if (so) {
4006 4007
		int len = xdr->buf->len - post_err_offset;

4008
		so->so_replay.rp_status = op->status;
4009 4010 4011
		so->so_replay.rp_buflen = len;
		read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
						so->so_replay.rp_buf, len);
4012
	}
4013
status:
4014 4015
	/* Note that op->status is already in network byte order: */
	write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
L
Linus Torvalds 已提交
4016 4017 4018 4019 4020 4021 4022 4023 4024
}

/* 
 * Encode the reply stored in the stateowner reply cache 
 * 
 * XDR note: do not encode rp->rp_buflen: the buffer contains the
 * previously sent already encoded operation.
 */
void
4025
nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
L
Linus Torvalds 已提交
4026
{
4027
	__be32 *p;
L
Linus Torvalds 已提交
4028 4029 4030 4031
	struct nfs4_replay *rp = op->replay;

	BUG_ON(!rp);

4032 4033 4034 4035 4036
	p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
	if (!p) {
		WARN_ON_ONCE(1);
		return;
	}
J
J. Bruce Fields 已提交
4037
	*p++ = cpu_to_be32(op->opnum);
L
Linus Torvalds 已提交
4038 4039
	*p++ = rp->rp_status;  /* already xdr'ed */

J
J. Bruce Fields 已提交
4040
	p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
L
Linus Torvalds 已提交
4041 4042 4043
}

int
A
Al Viro 已提交
4044
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
4045 4046 4047 4048
{
        return xdr_ressize_check(rqstp, p);
}

4049
int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
L
Linus Torvalds 已提交
4050
{
4051 4052 4053
	struct svc_rqst *rqstp = rq;
	struct nfsd4_compoundargs *args = rqstp->rq_argp;

L
Linus Torvalds 已提交
4054 4055 4056 4057
	if (args->ops != args->iops) {
		kfree(args->ops);
		args->ops = args->iops;
	}
J
Jesper Juhl 已提交
4058 4059
	kfree(args->tmpp);
	args->tmpp = NULL;
L
Linus Torvalds 已提交
4060
	while (args->to_free) {
4061
		struct svcxdr_tmpbuf *tb = args->to_free;
L
Linus Torvalds 已提交
4062 4063 4064
		args->to_free = tb->next;
		kfree(tb);
	}
4065
	return 1;
L
Linus Torvalds 已提交
4066 4067 4068
}

int
A
Al Viro 已提交
4069
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
L
Linus Torvalds 已提交
4070
{
4071 4072 4073 4074 4075 4076
	if (rqstp->rq_arg.head[0].iov_len % 4) {
		/* client is nuts */
		dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
			__func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
		return 0;
	}
L
Linus Torvalds 已提交
4077 4078 4079 4080 4081 4082 4083 4084 4085
	args->p = p;
	args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
	args->pagelist = rqstp->rq_arg.pages;
	args->pagelen = rqstp->rq_arg.page_len;
	args->tmpp = NULL;
	args->to_free = NULL;
	args->ops = args->iops;
	args->rqstp = rqstp;

4086
	return !nfsd4_decode_compound(args);
L
Linus Torvalds 已提交
4087 4088 4089
}

int
A
Al Viro 已提交
4090
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
L
Linus Torvalds 已提交
4091 4092 4093 4094
{
	/*
	 * All that remains is to write the tag and operation count...
	 */
4095 4096 4097 4098
	struct xdr_buf *buf = resp->xdr.buf;

	WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
				 buf->tail[0].iov_len);
4099

4100 4101
	rqstp->rq_next_page = resp->xdr.page_ptr + 1;

L
Linus Torvalds 已提交
4102 4103 4104 4105 4106 4107
	p = resp->tagp;
	*p++ = htonl(resp->taglen);
	memcpy(p, resp->tag, resp->taglen);
	p += XDR_QUADLEN(resp->taglen);
	*p++ = htonl(resp->opcnt);

4108
	nfsd4_sequence_done(resp);
L
Linus Torvalds 已提交
4109 4110 4111 4112 4113 4114 4115 4116
	return 1;
}

/*
 * Local variables:
 *  c-basic-offset: 8
 * End:
 */