nfs4xdr.c 91.0 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.
 *
 * TODO: Neil Brown made the following observation:  We currently
 * initially reserve NFSD_BUFSIZE space on the transmit queue and
 * never release any of that until the request is complete.
 * It would be good to calculate a new maximum response size while
 * decoding the COMPOUND, and call svc_reserve with this number
 * at the end of nfs4svc_decode_compoundargs.
 */

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

	if (len == 0)
		return nfserr_inval;
	if (isdotent(str, len))
		return err;
	for (i = 0; i < len; i++)
		if (str[i] == '/')
			return err;
	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 READ32(x)         (x) = ntohl(*p++)
#define READ64(x)         do {			\
	(x) = (u64)ntohl(*p++) << 32;		\
	(x) |= ntohl(*p++);			\
} while (0)
#define READTIME(x)       do {			\
	p++;					\
	(x) = ntohl(*p++);			\
	p++;					\
} while (0)
#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 __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);
	/* step to next page */
	argp->p = page_address(argp->pagelist[0]);
	argp->pagelist++;
	if (argp->pagelen < PAGE_SIZE) {
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		argp->end = argp->p + (argp->pagelen>>2);
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		argp->pagelen = 0;
	} else {
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		argp->end = argp->p + (PAGE_SIZE>>2);
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		argp->pagelen -= PAGE_SIZE;
	}
	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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static int
defer_free(struct nfsd4_compoundargs *argp,
		void (*release)(const void *), void *p)
{
	struct tmpbuf *tb;

	tb = kmalloc(sizeof(*tb), GFP_KERNEL);
	if (!tb)
		return -ENOMEM;
	tb->buf = p;
	tb->release = release;
	tb->next = argp->to_free;
	argp->to_free = tb;
	return 0;
}

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static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
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{
	if (p == argp->tmp) {
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		p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
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		if (!p)
			return NULL;
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	} else {
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		BUG_ON(p != argp->tmpp);
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		argp->tmpp = NULL;
	}
	if (defer_free(argp, kfree, p)) {
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		kfree(p);
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		return NULL;
	} else
		return (char *)p;
}

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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);
	READ32(bmlen);
	if (bmlen > 1000)
		goto xdr_error;

	READ_BUF(bmlen << 2);
	if (bmlen > 0)
		READ32(bmval[0]);
	if (bmlen > 1)
		READ32(bmval[1]);
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	if (bmlen > 2)
		READ32(bmval[2]);
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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)
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{
	int expected_len, len = 0;
	u32 dummy32;
	char *buf;
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	int host_err;
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	DECODE_HEAD;
	iattr->ia_valid = 0;
	if ((status = nfsd4_decode_bitmap(argp, bmval)))
		return status;

	READ_BUF(4);
	READ32(expected_len);

	if (bmval[0] & FATTR4_WORD0_SIZE) {
		READ_BUF(8);
		len += 8;
		READ64(iattr->ia_size);
		iattr->ia_valid |= ATTR_SIZE;
	}
	if (bmval[0] & FATTR4_WORD0_ACL) {
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		int nace;
		struct nfs4_ace *ace;
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		READ_BUF(4); len += 4;
		READ32(nace);

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		if (nace > NFS4_ACL_MAX)
			return nfserr_resource;

		*acl = nfs4_acl_new(nace);
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		if (*acl == NULL) {
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			host_err = -ENOMEM;
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			goto out_nfserr;
		}
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		defer_free(argp, kfree, *acl);
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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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			READ32(ace->type);
			READ32(ace->flag);
			READ32(ace->access_mask);
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			READ32(dummy32);
			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)
				ace->who = 0;
			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);
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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);
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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;
		READ32(iattr->ia_mode);
		iattr->ia_mode &= (S_IFMT | S_IALLUGO);
		iattr->ia_valid |= ATTR_MODE;
	}
	if (bmval[1] & FATTR4_WORD1_OWNER) {
		READ_BUF(4);
		len += 4;
		READ32(dummy32);
		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;
		READ32(dummy32);
		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;
		READ32(dummy32);
		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;
			READ32(dummy32);
			if (dummy32)
				return nfserr_inval;
			READ32(iattr->ia_atime.tv_sec);
			READ32(iattr->ia_atime.tv_nsec);
			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;
		READ32(dummy32);
		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;
			READ32(dummy32);
			if (dummy32)
				return nfserr_inval;
			READ32(iattr->ia_mtime.tv_sec);
			READ32(iattr->ia_mtime.tv_nsec);
			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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	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;

out_nfserr:
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	status = nfserrno(host_err);
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	goto out;
}

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

	READ_BUF(sizeof(stateid_t));
	READ32(sid->si_generation);
	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);
	READ32(access->ac_req_access);

	DECODE_TAIL;
}

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

	/* callback_sec_params4 */
	READ_BUF(4);
	READ32(nr_secflavs);
	for (i = 0; i < nr_secflavs; ++i) {
		READ_BUF(4);
		READ32(dummy);
		switch (dummy) {
		case RPC_AUTH_NULL:
			/* Nothing to read */
			break;
		case RPC_AUTH_UNIX:
			READ_BUF(8);
			/* stamp */
			READ32(dummy);

			/* machine name */
			READ32(dummy);
			READ_BUF(dummy);
			SAVEMEM(machine_name, dummy);

			/* uid, gid */
			READ_BUF(8);
			READ32(cbs->uid);
			READ32(cbs->gid);

			/* more gids */
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy * 4);
			break;
		case RPC_AUTH_GSS:
			dprintk("RPC_AUTH_GSS callback secflavor "
				"not supported!\n");
			READ_BUF(8);
			/* gcbp_service */
			READ32(dummy);
			/* gcbp_handle_from_server */
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
			/* gcbp_handle_from_client */
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			break;
		default:
			dprintk("Illegal callback secflavor\n");
			return nfserr_inval;
		}
	}
	DECODE_TAIL;
}

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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);
	READ32(bcts->dir);
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	/* XXX: skipping ctsa_use_conn_in_rdma_mode.  Perhaps Tom Tucker
	 * could help us figure out we should be using it. */
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	DECODE_TAIL;
}

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static __be32
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nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
	DECODE_HEAD;

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	READ_BUF(4);
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	READ32(close->cl_seqid);
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	return nfsd4_decode_stateid(argp, &close->cl_stateid);
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	DECODE_TAIL;
}


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static __be32
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nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
{
	DECODE_HEAD;

	READ_BUF(12);
	READ64(commit->co_offset);
	READ32(commit->co_count);

	DECODE_TAIL;
}

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static __be32
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nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(create->cr_type);
	switch (create->cr_type) {
	case NF4LNK:
		READ_BUF(4);
		READ32(create->cr_linklen);
		READ_BUF(create->cr_linklen);
		SAVEMEM(create->cr_linkname, create->cr_linklen);
		break;
	case NF4BLK:
	case NF4CHR:
		READ_BUF(8);
		READ32(create->cr_specdata1);
		READ32(create->cr_specdata2);
		break;
	case NF4SOCK:
	case NF4FIFO:
	case NF4DIR:
	default:
		break;
	}

	READ_BUF(4);
	READ32(create->cr_namelen);
	READ_BUF(create->cr_namelen);
	SAVEMEM(create->cr_name, create->cr_namelen);
	if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
		return status;

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	status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
				    &create->cr_acl);
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	if (status)
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		goto out;

	DECODE_TAIL;
}

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static inline __be32
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nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
{
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	return nfsd4_decode_stateid(argp, &dr->dr_stateid);
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}

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static inline __be32
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nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
{
	return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
}

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static __be32
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nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(link->li_namelen);
	READ_BUF(link->li_namelen);
	SAVEMEM(link->li_name, link->li_namelen);
	if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
		return status;

	DECODE_TAIL;
}

592
static __be32
L
Linus Torvalds 已提交
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609
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);
	READ32(lock->lk_type);
	if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ32(lock->lk_reclaim);
	READ64(lock->lk_offset);
	READ64(lock->lk_length);
	READ32(lock->lk_is_new);

	if (lock->lk_is_new) {
610
		READ_BUF(4);
L
Linus Torvalds 已提交
611
		READ32(lock->lk_new_open_seqid);
612 613 614 615
		status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
		if (status)
			return status;
		READ_BUF(8 + sizeof(clientid_t));
L
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616 617 618 619 620 621
		READ32(lock->lk_new_lock_seqid);
		COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
		READ32(lock->lk_new_owner.len);
		READ_BUF(lock->lk_new_owner.len);
		READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
	} else {
622 623 624 625
		status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
		if (status)
			return status;
		READ_BUF(4);
L
Linus Torvalds 已提交
626 627 628 629 630 631
		READ32(lock->lk_old_lock_seqid);
	}

	DECODE_TAIL;
}

632
static __be32
L
Linus Torvalds 已提交
633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
{
	DECODE_HEAD;
		        
	READ_BUF(32);
	READ32(lockt->lt_type);
	if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ64(lockt->lt_offset);
	READ64(lockt->lt_length);
	COPYMEM(&lockt->lt_clientid, 8);
	READ32(lockt->lt_owner.len);
	READ_BUF(lockt->lt_owner.len);
	READMEM(lockt->lt_owner.data, lockt->lt_owner.len);

	DECODE_TAIL;
}

651
static __be32
L
Linus Torvalds 已提交
652 653 654 655
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
	DECODE_HEAD;

656
	READ_BUF(8);
L
Linus Torvalds 已提交
657 658 659 660
	READ32(locku->lu_type);
	if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ32(locku->lu_seqid);
661 662 663 664
	status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
	if (status)
		return status;
	READ_BUF(16);
L
Linus Torvalds 已提交
665 666 667 668 669 670
	READ64(locku->lu_offset);
	READ64(locku->lu_length);

	DECODE_TAIL;
}

671
static __be32
L
Linus Torvalds 已提交
672 673 674 675 676 677 678 679 680 681 682 683 684 685
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(lookup->lo_len);
	READ_BUF(lookup->lo_len);
	SAVEMEM(lookup->lo_name, lookup->lo_len);
	if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
		return status;

	DECODE_TAIL;
}

686
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
687 688 689 690 691 692
{
	__be32 *p;
	u32 w;

	READ_BUF(4);
	READ32(w);
693 694 695 696 697
	*share_access = w & NFS4_SHARE_ACCESS_MASK;
	*deleg_want = w & NFS4_SHARE_WANT_MASK;
	if (deleg_when)
		*deleg_when = w & NFS4_SHARE_WHEN_MASK;

698 699 700 701 702 703 704 705
	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;
	}
706
	w &= ~NFS4_SHARE_ACCESS_MASK;
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721
	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;
	}
722
	w &= ~NFS4_SHARE_WANT_MASK;
723 724
	if (!w)
		return nfs_ok;
725 726 727

	if (!deleg_when)	/* open_downgrade */
		return nfserr_inval;
728 729 730
	switch (w) {
	case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
	case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
731 732
	case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
	      NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
733 734 735 736 737 738 739 740 741 742 743 744 745
		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);
	READ32(*x);
	/* Note: unlinke access bits, deny bits may be zero. */
746
	if (*x & ~NFS4_SHARE_DENY_BOTH)
747 748 749 750 751 752
		return nfserr_bad_xdr;
	return nfs_ok;
xdr_error:
	return nfserr_bad_xdr;
}

753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769
static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
{
	__be32 *p;

	READ_BUF(4);
	READ32(o->len);

	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;
}

770
static __be32
L
Linus Torvalds 已提交
771 772 773
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
	DECODE_HEAD;
774
	u32 dummy;
L
Linus Torvalds 已提交
775 776 777

	memset(open->op_bmval, 0, sizeof(open->op_bmval));
	open->op_iattr.ia_valid = 0;
778
	open->op_openowner = NULL;
L
Linus Torvalds 已提交
779 780

	/* seqid, share_access, share_deny, clientid, ownerlen */
781
	READ_BUF(4);
L
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782
	READ32(open->op_seqid);
783 784 785
	/* decode, yet ignore deleg_when until supported */
	status = nfsd4_decode_share_access(argp, &open->op_share_access,
					   &open->op_deleg_want, &dummy);
786 787 788 789 790
	if (status)
		goto xdr_error;
	status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
	if (status)
		goto xdr_error;
791
	READ_BUF(sizeof(clientid_t));
L
Linus Torvalds 已提交
792
	COPYMEM(&open->op_clientid, sizeof(clientid_t));
793 794 795 796
	status = nfsd4_decode_opaque(argp, &open->op_owner);
	if (status)
		goto xdr_error;
	READ_BUF(4);
L
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797 798 799 800 801 802 803 804 805 806
	READ32(open->op_create);
	switch (open->op_create) {
	case NFS4_OPEN_NOCREATE:
		break;
	case NFS4_OPEN_CREATE:
		READ_BUF(4);
		READ32(open->op_createmode);
		switch (open->op_createmode) {
		case NFS4_CREATE_UNCHECKED:
		case NFS4_CREATE_GUARDED:
807
			status = nfsd4_decode_fattr(argp, open->op_bmval,
808
				&open->op_iattr, &open->op_acl);
809
			if (status)
L
Linus Torvalds 已提交
810 811 812
				goto out;
			break;
		case NFS4_CREATE_EXCLUSIVE:
813 814
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
815
			break;
B
Benny Halevy 已提交
816 817 818
		case NFS4_CREATE_EXCLUSIVE4_1:
			if (argp->minorversion < 1)
				goto xdr_error;
819 820
			READ_BUF(NFS4_VERIFIER_SIZE);
			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
B
Benny Halevy 已提交
821
			status = nfsd4_decode_fattr(argp, open->op_bmval,
822
				&open->op_iattr, &open->op_acl);
B
Benny Halevy 已提交
823 824 825
			if (status)
				goto out;
			break;
L
Linus Torvalds 已提交
826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
		default:
			goto xdr_error;
		}
		break;
	default:
		goto xdr_error;
	}

	/* open_claim */
	READ_BUF(4);
	READ32(open->op_claim_type);
	switch (open->op_claim_type) {
	case NFS4_OPEN_CLAIM_NULL:
	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
		READ_BUF(4);
		READ32(open->op_fname.len);
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
		if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
			return status;
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		READ_BUF(4);
		READ32(open->op_delegate_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
852 853 854 855
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		READ_BUF(4);
L
Linus Torvalds 已提交
856 857 858 859 860 861
		READ32(open->op_fname.len);
		READ_BUF(open->op_fname.len);
		SAVEMEM(open->op_fname.data, open->op_fname.len);
		if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
			return status;
		break;
862 863 864 865 866 867 868 869 870 871 872 873 874
	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
875 876 877 878 879 880 881
	default:
		goto xdr_error;
	}

	DECODE_TAIL;
}

882
static __be32
L
Linus Torvalds 已提交
883 884 885 886
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
	DECODE_HEAD;
		    
887 888 889 890
	status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
	if (status)
		return status;
	READ_BUF(4);
L
Linus Torvalds 已提交
891 892 893 894 895
	READ32(open_conf->oc_seqid);
						        
	DECODE_TAIL;
}

896
static __be32
L
Linus Torvalds 已提交
897 898 899 900
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
	DECODE_HEAD;
		    
901 902 903
	status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
	if (status)
		return status;
904
	READ_BUF(4);
L
Linus Torvalds 已提交
905
	READ32(open_down->od_seqid);
906 907
	status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
					   &open_down->od_deleg_want, NULL);
908 909 910 911 912
	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
913 914 915
	DECODE_TAIL;
}

916
static __be32
L
Linus Torvalds 已提交
917 918 919 920 921 922 923 924 925 926 927 928 929 930
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(putfh->pf_fhlen);
	if (putfh->pf_fhlen > NFS4_FHSIZE)
		goto xdr_error;
	READ_BUF(putfh->pf_fhlen);
	SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);

	DECODE_TAIL;
}

931
static __be32
L
Linus Torvalds 已提交
932 933 934 935
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
	DECODE_HEAD;

936 937 938 939
	status = nfsd4_decode_stateid(argp, &read->rd_stateid);
	if (status)
		return status;
	READ_BUF(12);
L
Linus Torvalds 已提交
940 941 942 943 944 945
	READ64(read->rd_offset);
	READ32(read->rd_length);

	DECODE_TAIL;
}

946
static __be32
L
Linus Torvalds 已提交
947 948 949 950 951 952 953 954 955 956 957 958 959 960 961
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
{
	DECODE_HEAD;

	READ_BUF(24);
	READ64(readdir->rd_cookie);
	COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
	READ32(readdir->rd_dircount);    /* just in case you needed a useless field... */
	READ32(readdir->rd_maxcount);
	if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
		goto out;

	DECODE_TAIL;
}

962
static __be32
L
Linus Torvalds 已提交
963 964 965 966 967 968 969 970 971 972 973 974 975 976
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(remove->rm_namelen);
	READ_BUF(remove->rm_namelen);
	SAVEMEM(remove->rm_name, remove->rm_namelen);
	if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
		return status;

	DECODE_TAIL;
}

977
static __be32
L
Linus Torvalds 已提交
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(rename->rn_snamelen);
	READ_BUF(rename->rn_snamelen + 4);
	SAVEMEM(rename->rn_sname, rename->rn_snamelen);
	READ32(rename->rn_tnamelen);
	READ_BUF(rename->rn_tnamelen);
	SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
	if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
		return status;
	if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
		return status;

	DECODE_TAIL;
}

997
static __be32
L
Linus Torvalds 已提交
998 999 1000 1001 1002 1003 1004 1005 1006 1007
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(clientid_t));
	COPYMEM(clientid, sizeof(clientid_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
static __be32
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo *secinfo)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(secinfo->si_namelen);
	READ_BUF(secinfo->si_namelen);
	SAVEMEM(secinfo->si_name, secinfo->si_namelen);
	status = check_filename(secinfo->si_name, secinfo->si_namelen,
								nfserr_noent);
	if (status)
		return status;
	DECODE_TAIL;
}

J
J. Bruce Fields 已提交
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
static __be32
nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
		     struct nfsd4_secinfo_no_name *sin)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(sin->sin_style);
	DECODE_TAIL;
}

1036
static __be32
L
Linus Torvalds 已提交
1037 1038
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
1039
	__be32 status;
L
Linus Torvalds 已提交
1040

1041 1042 1043
	status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
	if (status)
		return status;
1044 1045
	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
				  &setattr->sa_acl);
L
Linus Torvalds 已提交
1046 1047
}

1048
static __be32
L
Linus Torvalds 已提交
1049 1050 1051 1052
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
{
	DECODE_HEAD;

1053 1054
	READ_BUF(NFS4_VERIFIER_SIZE);
	COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1055

1056 1057 1058 1059
	status = nfsd4_decode_opaque(argp, &setclientid->se_name);
	if (status)
		return nfserr_bad_xdr;
	READ_BUF(8);
L
Linus Torvalds 已提交
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
	READ32(setclientid->se_callback_prog);
	READ32(setclientid->se_callback_netid_len);

	READ_BUF(setclientid->se_callback_netid_len + 4);
	SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
	READ32(setclientid->se_callback_addr_len);

	READ_BUF(setclientid->se_callback_addr_len + 4);
	SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
	READ32(setclientid->se_callback_ident);

	DECODE_TAIL;
}

1074
static __be32
L
Linus Torvalds 已提交
1075 1076 1077 1078
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
{
	DECODE_HEAD;

1079
	READ_BUF(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1080
	COPYMEM(&scd_c->sc_clientid, 8);
1081
	COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
1082 1083 1084 1085 1086

	DECODE_TAIL;
}

/* Also used for NVERIFY */
1087
static __be32
L
Linus Torvalds 已提交
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
{
#if 0
	struct nfsd4_compoundargs save = {
		.p = argp->p,
		.end = argp->end,
		.rqstp = argp->rqstp,
	};
	u32             ve_bmval[2];
	struct iattr    ve_iattr;           /* request */
	struct nfs4_acl *ve_acl;            /* request */
#endif
	DECODE_HEAD;

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

	/* For convenience's sake, we compare raw xdr'd attributes in
	 * nfsd4_proc_verify; however we still decode here just to return
	 * correct error in case of bad xdr. */
#if 0
	status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
	if (status == nfserr_inval) {
		status = nfserrno(status);
		goto out;
	}
#endif
	READ_BUF(4);
	READ32(verify->ve_attrlen);
	READ_BUF(verify->ve_attrlen);
	SAVEMEM(verify->ve_attrval, verify->ve_attrlen);

	DECODE_TAIL;
}

1123
static __be32
L
Linus Torvalds 已提交
1124 1125 1126 1127 1128 1129 1130
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
	int avail;
	int v;
	int len;
	DECODE_HEAD;

1131 1132 1133 1134
	status = nfsd4_decode_stateid(argp, &write->wr_stateid);
	if (status)
		return status;
	READ_BUF(16);
L
Linus Torvalds 已提交
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
	READ64(write->wr_offset);
	READ32(write->wr_stable_how);
	if (write->wr_stable_how > 2)
		goto xdr_error;
	READ32(write->wr_buflen);

	/* 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) {
1147 1148
		dprintk("NFSD: xdr error (%s:%d)\n",
				__FILE__, __LINE__);
L
Linus Torvalds 已提交
1149 1150
		goto xdr_error;
	}
1151 1152
	argp->rqstp->rq_vec[0].iov_base = p;
	argp->rqstp->rq_vec[0].iov_len = avail;
L
Linus Torvalds 已提交
1153 1154
	v = 0;
	len = write->wr_buflen;
1155 1156
	while (len > argp->rqstp->rq_vec[v].iov_len) {
		len -= argp->rqstp->rq_vec[v].iov_len;
L
Linus Torvalds 已提交
1157
		v++;
1158
		argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
L
Linus Torvalds 已提交
1159 1160
		argp->pagelist++;
		if (argp->pagelen >= PAGE_SIZE) {
1161
			argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
L
Linus Torvalds 已提交
1162 1163
			argp->pagelen -= PAGE_SIZE;
		} else {
1164
			argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
L
Linus Torvalds 已提交
1165 1166 1167
			argp->pagelen -= len;
		}
	}
A
Al Viro 已提交
1168 1169
	argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
	argp->p = (__be32*)  (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1170
	argp->rqstp->rq_vec[v].iov_len = len;
L
Linus Torvalds 已提交
1171 1172 1173 1174 1175
	write->wr_vlen = v+1;

	DECODE_TAIL;
}

1176
static __be32
L
Linus Torvalds 已提交
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
{
	DECODE_HEAD;

	READ_BUF(12);
	COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
	READ32(rlockowner->rl_owner.len);
	READ_BUF(rlockowner->rl_owner.len);
	READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);

A
Andy Adamson 已提交
1187 1188
	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
		return nfserr_inval;
L
Linus Torvalds 已提交
1189 1190 1191
	DECODE_TAIL;
}

A
Andy Adamson 已提交
1192 1193
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
A
Andy Adamson 已提交
1194
			 struct nfsd4_exchange_id *exid)
A
Andy Adamson 已提交
1195
{
1196
	int dummy, tmp;
A
Andy Adamson 已提交
1197 1198 1199 1200 1201
	DECODE_HEAD;

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

1202 1203 1204
	status = nfsd4_decode_opaque(argp, &exid->clname);
	if (status)
		return nfserr_bad_xdr;
A
Andy Adamson 已提交
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241

	READ_BUF(4);
	READ32(exid->flags);

	/* Ignore state_protect4_a */
	READ_BUF(4);
	READ32(exid->spa_how);
	switch (exid->spa_how) {
	case SP4_NONE:
		break;
	case SP4_MACH_CRED:
		/* spo_must_enforce */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		/* spo_must_allow */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;
		break;
	case SP4_SSV:
		/* ssp_ops */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy * 4);
		p += dummy;

		/* ssp_hash_algs<> */
		READ_BUF(4);
1242 1243 1244 1245 1246 1247 1248
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1249 1250 1251

		/* ssp_encr_algs<> */
		READ_BUF(4);
1252 1253 1254 1255 1256 1257 1258
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293

		/* ssp_window and ssp_num_gss_handles */
		READ_BUF(8);
		READ32(dummy);
		READ32(dummy);
		break;
	default:
		goto xdr_error;
	}

	/* Ignore Implementation ID */
	READ_BUF(4);    /* nfs_impl_id4 array length */
	READ32(dummy);

	if (dummy > 1)
		goto xdr_error;

	if (dummy == 1) {
		/* nii_domain */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_name */
		READ_BUF(4);
		READ32(dummy);
		READ_BUF(dummy);
		p += XDR_QUADLEN(dummy);

		/* nii_date */
		READ_BUF(12);
		p += 3;
	}
	DECODE_TAIL;
A
Andy Adamson 已提交
1294 1295 1296 1297 1298 1299
}

static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
			    struct nfsd4_create_session *sess)
{
A
Andy Adamson 已提交
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
	DECODE_HEAD;
	u32 dummy;

	READ_BUF(16);
	COPYMEM(&sess->clientid, 8);
	READ32(sess->seqid);
	READ32(sess->flags);

	/* Fore channel attrs */
	READ_BUF(28);
	READ32(dummy); /* headerpadsz is always 0 */
	READ32(sess->fore_channel.maxreq_sz);
	READ32(sess->fore_channel.maxresp_sz);
	READ32(sess->fore_channel.maxresp_cached);
	READ32(sess->fore_channel.maxops);
	READ32(sess->fore_channel.maxreqs);
	READ32(sess->fore_channel.nr_rdma_attrs);
	if (sess->fore_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
		READ32(sess->fore_channel.rdma_attrs);
	} 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);
	READ32(dummy); /* headerpadsz is always 0 */
	READ32(sess->back_channel.maxreq_sz);
	READ32(sess->back_channel.maxresp_sz);
	READ32(sess->back_channel.maxresp_cached);
	READ32(sess->back_channel.maxops);
	READ32(sess->back_channel.maxreqs);
	READ32(sess->back_channel.nr_rdma_attrs);
	if (sess->back_channel.nr_rdma_attrs == 1) {
		READ_BUF(4);
		READ32(sess->back_channel.rdma_attrs);
	} else if (sess->back_channel.nr_rdma_attrs > 1) {
		dprintk("Too many back channel attr bitmaps!\n");
		goto xdr_error;
	}

1342
	READ_BUF(4);
A
Andy Adamson 已提交
1343
	READ32(sess->callback_prog);
1344
	nfsd4_decode_cb_sec(argp, &sess->cb_sec);
A
Andy Adamson 已提交
1345
	DECODE_TAIL;
A
Andy Adamson 已提交
1346 1347 1348 1349 1350 1351
}

static __be32
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
			     struct nfsd4_destroy_session *destroy_session)
{
B
Benny Halevy 已提交
1352 1353 1354 1355 1356
	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
1357 1358
}

1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371
static __be32
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
			  struct nfsd4_free_stateid *free_stateid)
{
	DECODE_HEAD;

	READ_BUF(sizeof(stateid_t));
	READ32(free_stateid->fr_stateid.si_generation);
	COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));

	DECODE_TAIL;
}

A
Andy Adamson 已提交
1372 1373 1374 1375
static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
		      struct nfsd4_sequence *seq)
{
B
Benny Halevy 已提交
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
	DECODE_HEAD;

	READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
	COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	READ32(seq->seqid);
	READ32(seq->slotid);
	READ32(seq->maxslots);
	READ32(seq->cachethis);

	DECODE_TAIL;
A
Andy Adamson 已提交
1386 1387
}

1388 1389 1390 1391
static __be32
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
{
	int i;
1392 1393
	__be32 *p, status;
	struct nfsd4_test_stateid_id *stateid;
1394 1395 1396 1397

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

1398
	INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1399 1400

	for (i = 0; i < test_stateid->ts_num_ids; i++) {
1401 1402
		stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
		if (!stateid) {
1403
			status = nfserrno(-ENOMEM);
1404 1405 1406 1407 1408 1409 1410 1411
			goto out;
		}

		defer_free(argp, kfree, stateid);
		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);
1412
		if (status)
1413
			goto out;
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424
	}

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

1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
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;
}

1435 1436 1437 1438 1439 1440 1441 1442 1443 1444
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
{
	DECODE_HEAD;

	READ_BUF(4);
	READ32(rc->rca_one_fs);

	DECODE_TAIL;
}

1445 1446 1447 1448 1449 1450
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
	return nfs_ok;
}

1451 1452 1453
static __be32
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
{
1454
	return nfserr_notsupp;
1455 1456
}

1457 1458 1459
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);

static nfsd4_dec nfsd4_dec_ops[] = {
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479
	[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,
1480
	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_noop,
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496
	[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,
1497 1498
};

A
Andy Adamson 已提交
1499
static nfsd4_dec nfsd41_dec_ops[] = {
R
Randy Dunlap 已提交
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536
	[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_notsupp,
	[OP_OPEN_DOWNGRADE]	= (nfsd4_dec)nfsd4_decode_open_downgrade,
	[OP_PUTFH]		= (nfsd4_dec)nfsd4_decode_putfh,
	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[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_notsupp,
	[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_notsupp,
	[OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_VERIFY]		= (nfsd4_dec)nfsd4_decode_verify,
	[OP_WRITE]		= (nfsd4_dec)nfsd4_decode_write,
	[OP_RELEASE_LOCKOWNER]	= (nfsd4_dec)nfsd4_decode_notsupp,
A
Andy Adamson 已提交
1537 1538

	/* new operations for NFSv4.1 */
R
Randy Dunlap 已提交
1539
	[OP_BACKCHANNEL_CTL]	= (nfsd4_dec)nfsd4_decode_notsupp,
1540
	[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
R
Randy Dunlap 已提交
1541 1542 1543
	[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,
1544
	[OP_FREE_STATEID]	= (nfsd4_dec)nfsd4_decode_free_stateid,
R
Randy Dunlap 已提交
1545 1546 1547 1548 1549 1550
	[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
1551
	[OP_SECINFO_NO_NAME]	= (nfsd4_dec)nfsd4_decode_secinfo_no_name,
R
Randy Dunlap 已提交
1552 1553
	[OP_SEQUENCE]		= (nfsd4_dec)nfsd4_decode_sequence,
	[OP_SET_SSV]		= (nfsd4_dec)nfsd4_decode_notsupp,
1554
	[OP_TEST_STATEID]	= (nfsd4_dec)nfsd4_decode_test_stateid,
R
Randy Dunlap 已提交
1555
	[OP_WANT_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
1556
	[OP_DESTROY_CLIENTID]	= (nfsd4_dec)nfsd4_decode_destroy_clientid,
1557
	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,
A
Andy Adamson 已提交
1558 1559
};

1560 1561 1562 1563 1564 1565
struct nfsd4_minorversion_ops {
	nfsd4_dec *decoders;
	int nops;
};

static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1566
	[0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
A
Andy Adamson 已提交
1567
	[1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1568 1569
};

1570
static __be32
L
Linus Torvalds 已提交
1571 1572 1573 1574
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
	DECODE_HEAD;
	struct nfsd4_op *op;
1575
	struct nfsd4_minorversion_ops *ops;
1576
	bool cachethis = false;
L
Linus Torvalds 已提交
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	int i;

	/*
	 * XXX: According to spec, we should check the tag
	 * for UTF-8 compliance.  I'm postponing this for
	 * now because it seems that some clients do use
	 * binary tags.
	 */
	READ_BUF(4);
	READ32(argp->taglen);
	READ_BUF(argp->taglen + 8);
	SAVEMEM(argp->tag, argp->taglen);
	READ32(argp->minorversion);
	READ32(argp->opcnt);

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

1597
	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
L
Linus Torvalds 已提交
1598 1599 1600
		argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
		if (!argp->ops) {
			argp->ops = argp->iops;
1601
			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
L
Linus Torvalds 已提交
1602 1603 1604 1605
			goto xdr_error;
		}
	}

1606
	if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1607 1608
		argp->opcnt = 0;

1609
	ops = &nfsd4_minorversion[argp->minorversion];
L
Linus Torvalds 已提交
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637
	for (i = 0; i < argp->opcnt; i++) {
		op = &argp->ops[i];
		op->replay = NULL;

		/*
		 * We can't use READ_BUF() here because we need to handle
		 * a missing opcode as an OP_WRITE + 1. So we need to check
		 * to see if we're truly at the end of our buffer or if there
		 * is another page we need to flip to.
		 */

		if (argp->p == argp->end) {
			if (argp->pagelen < 4) {
				/* There isn't an opcode still on the wire */
				op->opnum = OP_WRITE + 1;
				op->status = nfserr_bad_xdr;
				argp->opcnt = i+1;
				break;
			}

			/*
			 * False alarm. We just hit a page boundary, but there
			 * is still data available.  Move pointer across page
			 * boundary.  *snip from READ_BUF*
			 */
			argp->p = page_address(argp->pagelist[0]);
			argp->pagelist++;
			if (argp->pagelen < PAGE_SIZE) {
N
Neil Brown 已提交
1638
				argp->end = argp->p + (argp->pagelen>>2);
L
Linus Torvalds 已提交
1639 1640
				argp->pagelen = 0;
			} else {
N
Neil Brown 已提交
1641
				argp->end = argp->p + (PAGE_SIZE>>2);
L
Linus Torvalds 已提交
1642 1643 1644 1645 1646
				argp->pagelen -= PAGE_SIZE;
			}
		}
		op->opnum = ntohl(*argp->p++);

1647
		if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1648
			op->status = ops->decoders[op->opnum](argp, &op->u);
1649
		else {
L
Linus Torvalds 已提交
1650 1651 1652 1653 1654 1655 1656 1657
			op->opnum = OP_ILLEGAL;
			op->status = nfserr_op_illegal;
		}

		if (op->status) {
			argp->opcnt = i+1;
			break;
		}
1658 1659 1660 1661 1662
		/*
		 * 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);
L
Linus Torvalds 已提交
1663
	}
1664 1665 1666 1667
	/* Sessions make the DRC unnecessary: */
	if (argp->minorversion)
		cachethis = false;
	argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
L
Linus Torvalds 已提交
1668 1669 1670 1671 1672 1673 1674 1675 1676

	DECODE_TAIL;
}

#define WRITE32(n)               *p++ = htonl(n)
#define WRITE64(n)               do {				\
	*p++ = htonl((u32)((n) >> 32));				\
	*p++ = htonl((u32)(n));					\
} while (0)
1677
#define WRITEMEM(ptr,nbytes)     do { if (nbytes > 0) {		\
L
Linus Torvalds 已提交
1678 1679 1680
	*(p + XDR_QUADLEN(nbytes) -1) = 0;                      \
	memcpy(p, ptr, nbytes);					\
	p += XDR_QUADLEN(nbytes);				\
1681
}} while (0)
J
J. Bruce Fields 已提交
1682 1683 1684

static void write32(__be32 **p, u32 n)
{
1685
	*(*p)++ = htonl(n);
J
J. Bruce Fields 已提交
1686 1687 1688 1689
}

static void write64(__be32 **p, u64 n)
{
1690
	write32(p, (n >> 32));
J
J. Bruce Fields 已提交
1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
	write32(p, (u32)n);
}

static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
{
	if (IS_I_VERSION(inode)) {
		write64(p, inode->i_version);
	} else {
		write32(p, stat->ctime.tv_sec);
		write32(p, stat->ctime.tv_nsec);
	}
}

static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
{
	write32(p, c->atomic);
	if (c->change_supported) {
		write64(p, c->before_change);
		write64(p, c->after_change);
	} else {
		write32(p, c->before_ctime_sec);
		write32(p, c->before_ctime_nsec);
		write32(p, c->after_ctime_sec);
		write32(p, c->after_ctime_nsec);
	}
}
L
Linus Torvalds 已提交
1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727

#define RESERVE_SPACE(nbytes)	do {				\
	p = resp->p;						\
	BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end);		\
} while (0)
#define ADJUST_ARGS()		resp->p = p

/*
 * Header routine to setup seqid operation replay cache
 */
#define ENCODE_SEQID_OP_HEAD					\
A
Al Viro 已提交
1728
	__be32 *save;						\
L
Linus Torvalds 已提交
1729 1730 1731 1732
								\
	save = resp->p;

/*
N
NeilBrown 已提交
1733 1734 1735 1736
 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation.  This
 * is where sequence id's are incremented, and the replay cache is filled.
 * Note that we increment sequence id's here, at the last moment, so we're sure
 * we know whether the error to be returned is a sequence id mutating error.
L
Linus Torvalds 已提交
1737 1738
 */

1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
{
	struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;

	if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
		stateowner->so_seqid++;
		stateowner->so_replay.rp_status = nfserr;
		stateowner->so_replay.rp_buflen =
			  (char *)resp->p - (char *)save;
		memcpy(stateowner->so_replay.rp_buf, save,
			stateowner->so_replay.rp_buflen);
1750
		nfsd4_purge_closed_stateid(stateowner);
1751 1752
	}
}
L
Linus Torvalds 已提交
1753

1754
/* Encode as an array of strings the string given with components
1755
 * separated @sep, escaped with esc_enter and esc_exit.
1756
 */
1757 1758 1759
static __be32 nfsd4_encode_components_esc(char sep, char *components,
				   __be32 **pp, int *buflen,
				   char esc_enter, char esc_exit)
1760
{
A
Al Viro 已提交
1761 1762
	__be32 *p = *pp;
	__be32 *countp = p;
1763
	int strlen, count=0;
1764
	char *str, *end, *next;
1765 1766 1767 1768 1769 1770 1771

	dprintk("nfsd4_encode_components(%s)\n", components);
	if ((*buflen -= 4) < 0)
		return nfserr_resource;
	WRITE32(0); /* We will fill this in with @count later */
	end = str = components;
	while (*end) {
1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788
		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 */;

1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
		strlen = end - str;
		if (strlen) {
			if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
				return nfserr_resource;
			WRITE32(strlen);
			WRITEMEM(str, strlen);
			count++;
		}
		else
			end++;
		str = end;
	}
	*pp = p;
	p = countp;
	WRITE32(count);
	return 0;
}

1807 1808 1809 1810 1811 1812 1813 1814 1815
/* Encode as an array of strings the string given with components
 * separated @sep.
 */
static __be32 nfsd4_encode_components(char sep, char *components,
				   __be32 **pp, int *buflen)
{
	return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
}

1816 1817 1818
/*
 * encode a location element of a fs_locations structure
 */
1819
static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
A
Al Viro 已提交
1820
				    __be32 **pp, int *buflen)
1821
{
1822
	__be32 status;
A
Al Viro 已提交
1823
	__be32 *p = *pp;
1824

1825 1826
	status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
						'[', ']');
1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
	if (status)
		return status;
	status = nfsd4_encode_components('/', location->path, &p, buflen);
	if (status)
		return status;
	*pp = p;
	return 0;
}

/*
T
Trond Myklebust 已提交
1837
 * Encode a path in RFC3530 'pathname4' format
1838
 */
T
Trond Myklebust 已提交
1839 1840
static __be32 nfsd4_encode_path(const struct path *root,
		const struct path *path, __be32 **pp, int *buflen)
1841
{
T
Trond Myklebust 已提交
1842 1843 1844 1845 1846 1847 1848 1849
	struct path cur = {
		.mnt = path->mnt,
		.dentry = path->dentry,
	};
	__be32 *p = *pp;
	struct dentry **components = NULL;
	unsigned int ncomponents = 0;
	__be32 err = nfserr_jukebox;
1850

T
Trond Myklebust 已提交
1851
	dprintk("nfsd4_encode_components(");
1852

T
Trond Myklebust 已提交
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
	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);
	}
1877

T
Trond Myklebust 已提交
1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894
	*buflen -= 4;
	if (*buflen < 0)
		goto out_free;
	WRITE32(ncomponents);

	while (ncomponents) {
		struct dentry *dentry = components[ncomponents - 1];
		unsigned int len = dentry->d_name.len;

		*buflen -= 4 + (XDR_QUADLEN(len) << 2);
		if (*buflen < 0)
			goto out_free;
		WRITE32(len);
		WRITEMEM(dentry->d_name.name, len);
		dprintk("/%s", dentry->d_name.name);
		dput(dentry);
		ncomponents--;
1895
	}
T
Trond Myklebust 已提交
1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919

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

static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
		const struct path *path, __be32 **pp, int *buflen)
{
	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));
	res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
	exp_put(exp_ps);
	return res;
1920 1921 1922 1923 1924
}

/*
 *  encode a fs_locations structure
 */
1925
static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1926
				     struct svc_export *exp,
A
Al Viro 已提交
1927
				     __be32 **pp, int *buflen)
1928
{
1929
	__be32 status;
1930
	int i;
A
Al Viro 已提交
1931
	__be32 *p = *pp;
1932 1933
	struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;

T
Trond Myklebust 已提交
1934
	status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948
	if (status)
		return status;
	if ((*buflen -= 4) < 0)
		return nfserr_resource;
	WRITE32(fslocs->locations_count);
	for (i=0; i<fslocs->locations_count; i++) {
		status = nfsd4_encode_fs_location4(&fslocs->locations[i],
						   &p, buflen);
		if (status)
			return status;
	}
	*pp = p;
	return 0;
}
L
Linus Torvalds 已提交
1949

1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
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
1963

1964
static __be32
L
Linus Torvalds 已提交
1965
nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
A
Al Viro 已提交
1966
			__be32 **p, int *buflen)
L
Linus Torvalds 已提交
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
{
	int status;

	if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
		return nfserr_resource;
	if (whotype != NFS4_ACL_WHO_NAMED)
		status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
	else if (group)
		status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
	else
		status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
	if (status < 0)
		return nfserrno(status);
	*p = xdr_encode_opaque(*p, NULL, status);
	*buflen -= (XDR_QUADLEN(status) << 2) + 4;
	BUG_ON(*buflen < 0);
	return 0;
}

1986
static inline __be32
A
Al Viro 已提交
1987
nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1988 1989 1990 1991
{
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
}

1992
static inline __be32
A
Al Viro 已提交
1993
nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1994 1995 1996 1997
{
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
}

1998
static inline __be32
L
Linus Torvalds 已提交
1999
nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
A
Al Viro 已提交
2000
		__be32 **p, int *buflen)
L
Linus Torvalds 已提交
2001 2002 2003 2004
{
	return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
}

2005 2006 2007 2008
#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

2009
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
{
	/* 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
2024

2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040

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;
	}
	err = vfs_getattr(path.mnt, path.dentry, stat);
	path_put(&path);
	return err;
}

L
Linus Torvalds 已提交
2041 2042 2043 2044 2045 2046 2047
/*
 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
 * ourselves.
 *
 * @countp is the buffer size in _words_; upon successful return this becomes
 * replaced with the number of words written.
 */
2048
__be32
L
Linus Torvalds 已提交
2049
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
A
Al Viro 已提交
2050
		struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
2051
		struct svc_rqst *rqstp, int ignore_crossmnt)
L
Linus Torvalds 已提交
2052 2053 2054
{
	u32 bmval0 = bmval[0];
	u32 bmval1 = bmval[1];
2055
	u32 bmval2 = bmval[2];
L
Linus Torvalds 已提交
2056 2057 2058 2059
	struct kstat stat;
	struct svc_fh tempfh;
	struct kstatfs statfs;
	int buflen = *countp << 2;
A
Al Viro 已提交
2060
	__be32 *attrlenp;
L
Linus Torvalds 已提交
2061 2062
	u32 dummy;
	u64 dummy64;
2063
	u32 rdattr_err = 0;
A
Al Viro 已提交
2064
	__be32 *p = buffer;
2065
	__be32 status;
2066
	int err;
L
Linus Torvalds 已提交
2067 2068
	int aclsupport = 0;
	struct nfs4_acl *acl = NULL;
2069 2070
	struct nfsd4_compoundres *resp = rqstp->rq_resp;
	u32 minorversion = resp->cstate.minorversion;
2071 2072 2073 2074
	struct path path = {
		.mnt	= exp->ex_path.mnt,
		.dentry	= dentry,
	};
L
Linus Torvalds 已提交
2075 2076

	BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2077 2078 2079
	BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
	BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
	BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
L
Linus Torvalds 已提交
2080

2081
	if (exp->ex_fslocs.migrated) {
2082
		BUG_ON(bmval[2]);
2083 2084 2085 2086 2087
		status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
		if (status)
			goto out;
	}

2088
	err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
2089
	if (err)
L
Linus Torvalds 已提交
2090
		goto out_nfserr;
2091 2092
	if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
			FATTR4_WORD0_MAXNAME)) ||
L
Linus Torvalds 已提交
2093 2094
	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
		       FATTR4_WORD1_SPACE_TOTAL))) {
2095
		err = vfs_statfs(&path, &statfs);
2096
		if (err)
L
Linus Torvalds 已提交
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107
			goto out_nfserr;
	}
	if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
		fh_init(&tempfh, NFS4_FHSIZE);
		status = fh_compose(&tempfh, exp, dentry, NULL);
		if (status)
			goto out;
		fhp = &tempfh;
	}
	if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
			| FATTR4_WORD0_SUPPORTED_ATTRS)) {
2108 2109
		err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
		aclsupport = (err == 0);
L
Linus Torvalds 已提交
2110
		if (bmval0 & FATTR4_WORD0_ACL) {
2111
			if (err == -EOPNOTSUPP)
L
Linus Torvalds 已提交
2112
				bmval0 &= ~FATTR4_WORD0_ACL;
2113
			else if (err == -EINVAL) {
L
Linus Torvalds 已提交
2114 2115
				status = nfserr_attrnotsupp;
				goto out;
2116
			} else if (err != 0)
L
Linus Torvalds 已提交
2117 2118 2119 2120
				goto out_nfserr;
		}
	}

2121 2122 2123
	if (bmval2) {
		if ((buflen -= 16) < 0)
			goto out_resource;
2124 2125 2126 2127
		WRITE32(3);
		WRITE32(bmval0);
		WRITE32(bmval1);
		WRITE32(bmval2);
2128 2129 2130
	} else if (bmval1) {
		if ((buflen -= 12) < 0)
			goto out_resource;
2131 2132 2133 2134
		WRITE32(2);
		WRITE32(bmval0);
		WRITE32(bmval1);
	} else {
2135 2136
		if ((buflen -= 8) < 0)
			goto out_resource;
2137 2138 2139
		WRITE32(1);
		WRITE32(bmval0);
	}
L
Linus Torvalds 已提交
2140 2141 2142
	attrlenp = p++;                /* to be backfilled later */

	if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2143 2144 2145 2146
		u32 word0 = nfsd_suppattrs0(minorversion);
		u32 word1 = nfsd_suppattrs1(minorversion);
		u32 word2 = nfsd_suppattrs2(minorversion);

2147 2148
		if (!aclsupport)
			word0 &= ~FATTR4_WORD0_ACL;
2149
		if (!word2) {
2150 2151
			if ((buflen -= 12) < 0)
				goto out_resource;
2152 2153 2154 2155
			WRITE32(2);
			WRITE32(word0);
			WRITE32(word1);
		} else {
2156 2157
			if ((buflen -= 16) < 0)
				goto out_resource;
2158 2159 2160 2161 2162
			WRITE32(3);
			WRITE32(word0);
			WRITE32(word1);
			WRITE32(word2);
		}
L
Linus Torvalds 已提交
2163 2164 2165 2166
	}
	if (bmval0 & FATTR4_WORD0_TYPE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2167
		dummy = nfs4_file_type(stat.mode);
L
Linus Torvalds 已提交
2168 2169 2170 2171 2172 2173 2174
		if (dummy == NF4BAD)
			goto out_serverfault;
		WRITE32(dummy);
	}
	if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
N
NeilBrown 已提交
2175
		if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
N
NeilBrown 已提交
2176
			WRITE32(NFS4_FH_PERSISTENT);
N
NeilBrown 已提交
2177
		else
N
NeilBrown 已提交
2178
			WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
L
Linus Torvalds 已提交
2179 2180 2181 2182
	}
	if (bmval0 & FATTR4_WORD0_CHANGE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
J
J. Bruce Fields 已提交
2183
		write_change(&p, &stat, dentry->d_inode);
L
Linus Torvalds 已提交
2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207
	}
	if (bmval0 & FATTR4_WORD0_SIZE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64(stat.size);
	}
	if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(0);
	}
	if (bmval0 & FATTR4_WORD0_FSID) {
		if ((buflen -= 16) < 0)
			goto out_resource;
2208 2209 2210
		if (exp->ex_fslocs.migrated) {
			WRITE64(NFS4_REFERRAL_FSID_MAJOR);
			WRITE64(NFS4_REFERRAL_FSID_MINOR);
2211 2212
		} else switch(fsid_source(fhp)) {
		case FSIDSOURCE_FSID:
L
Linus Torvalds 已提交
2213 2214
			WRITE64((u64)exp->ex_fsid);
			WRITE64((u64)0);
2215 2216
			break;
		case FSIDSOURCE_DEV:
L
Linus Torvalds 已提交
2217 2218 2219 2220
			WRITE32(0);
			WRITE32(MAJOR(stat.dev));
			WRITE32(0);
			WRITE32(MINOR(stat.dev));
2221 2222 2223 2224
			break;
		case FSIDSOURCE_UUID:
			WRITEMEM(exp->ex_uuid, 16);
			break;
L
Linus Torvalds 已提交
2225 2226 2227 2228 2229 2230 2231 2232 2233 2234
		}
	}
	if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(0);
	}
	if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2235
		WRITE32(nfsd4_lease);
L
Linus Torvalds 已提交
2236 2237 2238 2239
	}
	if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2240
		WRITE32(rdattr_err);
L
Linus Torvalds 已提交
2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255
	}
	if (bmval0 & FATTR4_WORD0_ACL) {
		struct nfs4_ace *ace;

		if (acl == NULL) {
			if ((buflen -= 4) < 0)
				goto out_resource;

			WRITE32(0);
			goto out_acl;
		}
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(acl->naces);

2256
		for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
L
Linus Torvalds 已提交
2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285
			if ((buflen -= 4*3) < 0)
				goto out_resource;
			WRITE32(ace->type);
			WRITE32(ace->flag);
			WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
			status = nfsd4_encode_aclname(rqstp, ace->whotype,
				ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
				&p, &buflen);
			if (status == nfserr_resource)
				goto out_resource;
			if (status)
				goto out;
		}
	}
out_acl:
	if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(aclsupport ?
			ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
	}
	if (bmval0 & FATTR4_WORD0_CANSETTIME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2286
		WRITE32(0);
L
Linus Torvalds 已提交
2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
	}
	if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
		buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
		if (buflen < 0)
			goto out_resource;
		WRITE32(fhp->fh_handle.fh_size);
		WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
	}
	if (bmval0 & FATTR4_WORD0_FILEID) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2308
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324
	}
	if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_ffree);
	}
	if (bmval0 & FATTR4_WORD0_FILES_FREE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_ffree);
	}
	if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64((u64) statfs.f_files);
	}
2325 2326 2327 2328 2329 2330 2331
	if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
		status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
		if (status == nfserr_resource)
			goto out_resource;
		if (status)
			goto out;
	}
L
Linus Torvalds 已提交
2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349
	if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE64(~(u64)0);
	}
	if (bmval0 & FATTR4_WORD0_MAXLINK) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(255);
	}
	if (bmval0 & FATTR4_WORD0_MAXNAME) {
		if ((buflen -= 4) < 0)
			goto out_resource;
2350
		WRITE32(statfs.f_namelen);
L
Linus Torvalds 已提交
2351 2352 2353 2354
	}
	if (bmval0 & FATTR4_WORD0_MAXREAD) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2355
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2356 2357 2358 2359
	}
	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2360
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451
	}
	if (bmval1 & FATTR4_WORD1_MODE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(stat.mode & S_IALLUGO);
	}
	if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(1);
	}
	if (bmval1 & FATTR4_WORD1_NUMLINKS) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		WRITE32(stat.nlink);
	}
	if (bmval1 & FATTR4_WORD1_OWNER) {
		status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
		if (status == nfserr_resource)
			goto out_resource;
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
		status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
		if (status == nfserr_resource)
			goto out_resource;
		if (status)
			goto out;
	}
	if (bmval1 & FATTR4_WORD1_RAWDEV) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		WRITE32((u32) MAJOR(stat.rdev));
		WRITE32((u32) MINOR(stat.rdev));
	}
	if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_SPACE_USED) {
		if ((buflen -= 8) < 0)
			goto out_resource;
		dummy64 = (u64)stat.blocks << 9;
		WRITE64(dummy64);
	}
	if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
		if ((buflen -= 12) < 0)
			goto out_resource;
		WRITE32(0);
		WRITE32(stat.atime.tv_sec);
		WRITE32(stat.atime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
		if ((buflen -= 12) < 0)
			goto out_resource;
		WRITE32(0);
		WRITE32(1);
		WRITE32(0);
	}
	if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
		if ((buflen -= 12) < 0)
			goto out_resource;
		WRITE32(0);
		WRITE32(stat.ctime.tv_sec);
		WRITE32(stat.ctime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
		if ((buflen -= 12) < 0)
			goto out_resource;
		WRITE32(0);
		WRITE32(stat.mtime.tv_sec);
		WRITE32(stat.mtime.tv_nsec);
	}
	if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
		if ((buflen -= 8) < 0)
                	goto out_resource;
2452 2453 2454 2455 2456
		/*
		 * Get parent's attributes if not ignoring crossmount
		 * and this is the root of a cross-mounted filesystem.
		 */
		if (ignore_crossmnt == 0 &&
2457 2458
		    dentry == exp->ex_path.mnt->mnt_root)
			get_parent_attributes(exp, &stat);
2459
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2460
	}
2461 2462 2463 2464 2465 2466
	if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
		WRITE32(3);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
	}
2467

L
Linus Torvalds 已提交
2468 2469 2470 2471 2472
	*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
	*countp = p - buffer;
	status = nfs_ok;

out:
2473
	kfree(acl);
L
Linus Torvalds 已提交
2474 2475 2476 2477
	if (fhp == &tempfh)
		fh_put(&tempfh);
	return status;
out_nfserr:
2478
	status = nfserrno(err);
L
Linus Torvalds 已提交
2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
	goto out;
out_resource:
	*countp = 0;
	status = nfserr_resource;
	goto out;
out_serverfault:
	status = nfserr_serverfault;
	goto out;
}

2489 2490 2491 2492 2493 2494 2495 2496 2497
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;
}

2498
static __be32
L
Linus Torvalds 已提交
2499
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
A
Al Viro 已提交
2500
		const char *name, int namlen, __be32 *p, int *buflen)
L
Linus Torvalds 已提交
2501 2502 2503
{
	struct svc_export *exp = cd->rd_fhp->fh_export;
	struct dentry *dentry;
2504
	__be32 nfserr;
2505
	int ignore_crossmnt = 0;
L
Linus Torvalds 已提交
2506 2507 2508 2509

	dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
	if (IS_ERR(dentry))
		return nfserrno(PTR_ERR(dentry));
2510 2511 2512 2513 2514 2515 2516 2517 2518
	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
2519 2520

	exp_get(exp);
2521 2522 2523 2524 2525 2526 2527
	/*
	 * 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.
	 */
2528
	if (nfsd_mountpoint(dentry, exp)) {
2529 2530
		int err;

2531 2532 2533 2534 2535
		if (!(exp->ex_flags & NFSEXP_V4ROOT)
				&& !attributes_need_mount(cd->rd_bmval)) {
			ignore_crossmnt = 1;
			goto out_encode;
		}
A
Andy Adamson 已提交
2536 2537 2538 2539 2540
		/*
		 * Why the heck aren't we just using nfsd_lookup??
		 * Different "."/".." handling?  Something else?
		 * At least, add a comment here to explain....
		 */
2541 2542 2543
		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
		if (err) {
			nfserr = nfserrno(err);
L
Linus Torvalds 已提交
2544 2545
			goto out_put;
		}
A
Andy Adamson 已提交
2546 2547 2548
		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
		if (nfserr)
			goto out_put;
L
Linus Torvalds 已提交
2549 2550

	}
2551
out_encode:
L
Linus Torvalds 已提交
2552
	nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2553
					cd->rd_rqstp, ignore_crossmnt);
L
Linus Torvalds 已提交
2554 2555 2556 2557 2558 2559
out_put:
	dput(dentry);
	exp_put(exp);
	return nfserr;
}

A
Al Viro 已提交
2560
static __be32 *
2561
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
L
Linus Torvalds 已提交
2562
{
A
Al Viro 已提交
2563
	__be32 *attrlenp;
L
Linus Torvalds 已提交
2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577

	if (buflen < 6)
		return NULL;
	*p++ = htonl(2);
	*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
	*p++ = htonl(0);			 /* bmval1 */

	attrlenp = p++;
	*p++ = nfserr;       /* no htonl */
	*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
	return p;
}

static int
2578 2579
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
2580
{
2581
	struct readdir_cd *ccd = ccdv;
L
Linus Torvalds 已提交
2582 2583
	struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
	int buflen;
A
Al Viro 已提交
2584
	__be32 *p = cd->buffer;
2585
	__be32 *cookiep;
2586
	__be32 nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601

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

	if (cd->offset)
		xdr_encode_hyper(cd->offset, (u64) offset);

	buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
	if (buflen < 0)
		goto fail;

	*p++ = xdr_one;                             /* mark entry present */
2602
	cookiep = p;
L
Linus Torvalds 已提交
2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613
	p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
	p = xdr_encode_array(p, name, namlen);      /* name length & name */

	nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
	switch (nfserr) {
	case nfs_ok:
		p += buflen;
		break;
	case nfserr_resource:
		nfserr = nfserr_toosmall;
		goto fail;
2614 2615
	case nfserr_noent:
		goto skip_entry;
L
Linus Torvalds 已提交
2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626
	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;
		p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2627 2628
		if (p == NULL) {
			nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2629
			goto fail;
2630
		}
L
Linus Torvalds 已提交
2631 2632 2633
	}
	cd->buflen -= (p - cd->buffer);
	cd->buffer = p;
2634 2635
	cd->offset = cookiep;
skip_entry:
L
Linus Torvalds 已提交
2636 2637 2638 2639 2640 2641 2642
	cd->common.err = nfs_ok;
	return 0;
fail:
	cd->common.err = nfserr;
	return -EINVAL;
}

2643 2644 2645
static void
nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
{
2646
	__be32 *p;
2647 2648 2649 2650 2651 2652 2653

	RESERVE_SPACE(sizeof(stateid_t));
	WRITE32(sid->si_generation);
	WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
	ADJUST_ARGS();
}

2654
static __be32
2655
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
L
Linus Torvalds 已提交
2656
{
2657
	__be32 *p;
L
Linus Torvalds 已提交
2658 2659 2660 2661 2662 2663 2664

	if (!nfserr) {
		RESERVE_SPACE(8);
		WRITE32(access->ac_supported);
		WRITE32(access->ac_resp_access);
		ADJUST_ARGS();
	}
2665
	return nfserr;
L
Linus Torvalds 已提交
2666 2667
}

2668 2669 2670 2671 2672 2673 2674 2675
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
{
	__be32 *p;

	if (!nfserr) {
		RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
		WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
		WRITE32(bcts->dir);
2676
		/* Sorry, we do not yet support RDMA over 4.1: */
2677 2678 2679 2680 2681 2682
		WRITE32(0);
		ADJUST_ARGS();
	}
	return nfserr;
}

2683
static __be32
2684
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
L
Linus Torvalds 已提交
2685 2686 2687
{
	ENCODE_SEQID_OP_HEAD;

2688 2689 2690
	if (!nfserr)
		nfsd4_encode_stateid(resp, &close->cl_stateid);

2691
	encode_seqid_op_tail(resp, save, nfserr);
2692
	return nfserr;
L
Linus Torvalds 已提交
2693 2694 2695
}


2696
static __be32
2697
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
L
Linus Torvalds 已提交
2698
{
2699
	__be32 *p;
L
Linus Torvalds 已提交
2700 2701

	if (!nfserr) {
2702 2703
		RESERVE_SPACE(NFS4_VERIFIER_SIZE);
		WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
2704 2705
		ADJUST_ARGS();
	}
2706
	return nfserr;
L
Linus Torvalds 已提交
2707 2708
}

2709
static __be32
2710
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
L
Linus Torvalds 已提交
2711
{
2712
	__be32 *p;
L
Linus Torvalds 已提交
2713 2714 2715

	if (!nfserr) {
		RESERVE_SPACE(32);
J
J. Bruce Fields 已提交
2716
		write_cinfo(&p, &create->cr_cinfo);
L
Linus Torvalds 已提交
2717 2718 2719 2720 2721
		WRITE32(2);
		WRITE32(create->cr_bmval[0]);
		WRITE32(create->cr_bmval[1]);
		ADJUST_ARGS();
	}
2722
	return nfserr;
L
Linus Torvalds 已提交
2723 2724
}

2725 2726
static __be32
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
L
Linus Torvalds 已提交
2727 2728 2729 2730 2731 2732 2733 2734 2735 2736
{
	struct svc_fh *fhp = getattr->ga_fhp;
	int buflen;

	if (nfserr)
		return nfserr;

	buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
	nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
				    resp->p, &buflen, getattr->ga_bmval,
2737
				    resp->rqstp, 0);
L
Linus Torvalds 已提交
2738 2739 2740 2741 2742
	if (!nfserr)
		resp->p += buflen;
	return nfserr;
}

2743 2744
static __be32
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
L
Linus Torvalds 已提交
2745
{
2746
	struct svc_fh *fhp = *fhpp;
L
Linus Torvalds 已提交
2747
	unsigned int len;
2748
	__be32 *p;
L
Linus Torvalds 已提交
2749 2750 2751 2752 2753 2754 2755 2756

	if (!nfserr) {
		len = fhp->fh_handle.fh_size;
		RESERVE_SPACE(len + 4);
		WRITE32(len);
		WRITEMEM(&fhp->fh_handle.fh_base, len);
		ADJUST_ARGS();
	}
2757
	return nfserr;
L
Linus Torvalds 已提交
2758 2759 2760 2761 2762 2763 2764 2765 2766
}

/*
* Including all fields other than the name, a LOCK4denied structure requires
*   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
*/
static void
nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
{
2767
	struct xdr_netobj *conf = &ld->ld_owner;
2768
	__be32 *p;
L
Linus Torvalds 已提交
2769

2770
	RESERVE_SPACE(32 + XDR_LEN(conf->len));
L
Linus Torvalds 已提交
2771 2772 2773
	WRITE64(ld->ld_start);
	WRITE64(ld->ld_length);
	WRITE32(ld->ld_type);
2774
	if (conf->len) {
L
Linus Torvalds 已提交
2775
		WRITEMEM(&ld->ld_clientid, 8);
2776 2777 2778
		WRITE32(conf->len);
		WRITEMEM(conf->data, conf->len);
		kfree(conf->data);
L
Linus Torvalds 已提交
2779 2780 2781 2782 2783 2784 2785
	}  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
		WRITE64((u64)0); /* clientid */
		WRITE32(0); /* length of owner name */
	}
	ADJUST_ARGS();
}

2786
static __be32
2787
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
L
Linus Torvalds 已提交
2788 2789 2790
{
	ENCODE_SEQID_OP_HEAD;

2791 2792 2793
	if (!nfserr)
		nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
	else if (nfserr == nfserr_denied)
L
Linus Torvalds 已提交
2794 2795
		nfsd4_encode_lock_denied(resp, &lock->lk_denied);

2796
	encode_seqid_op_tail(resp, save, nfserr);
2797
	return nfserr;
L
Linus Torvalds 已提交
2798 2799
}

2800
static __be32
2801
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
L
Linus Torvalds 已提交
2802 2803 2804
{
	if (nfserr == nfserr_denied)
		nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2805
	return nfserr;
L
Linus Torvalds 已提交
2806 2807
}

2808
static __be32
2809
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
L
Linus Torvalds 已提交
2810 2811 2812
{
	ENCODE_SEQID_OP_HEAD;

2813 2814 2815
	if (!nfserr)
		nfsd4_encode_stateid(resp, &locku->lu_stateid);

2816
	encode_seqid_op_tail(resp, save, nfserr);
2817
	return nfserr;
L
Linus Torvalds 已提交
2818 2819 2820
}


2821
static __be32
2822
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
L
Linus Torvalds 已提交
2823
{
2824
	__be32 *p;
L
Linus Torvalds 已提交
2825 2826 2827

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
2828
		write_cinfo(&p, &link->li_cinfo);
L
Linus Torvalds 已提交
2829 2830
		ADJUST_ARGS();
	}
2831
	return nfserr;
L
Linus Torvalds 已提交
2832 2833 2834
}


2835
static __be32
2836
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
L
Linus Torvalds 已提交
2837
{
2838
	__be32 *p;
L
Linus Torvalds 已提交
2839 2840 2841 2842 2843
	ENCODE_SEQID_OP_HEAD;

	if (nfserr)
		goto out;

2844 2845
	nfsd4_encode_stateid(resp, &open->op_stateid);
	RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
2846
	write_cinfo(&p, &open->op_cinfo);
L
Linus Torvalds 已提交
2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857
	WRITE32(open->op_rflags);
	WRITE32(2);
	WRITE32(open->op_bmval[0]);
	WRITE32(open->op_bmval[1]);
	WRITE32(open->op_delegate_type);
	ADJUST_ARGS();

	switch (open->op_delegate_type) {
	case NFS4_OPEN_DELEGATE_NONE:
		break;
	case NFS4_OPEN_DELEGATE_READ:
2858 2859
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(20);
2860
		WRITE32(open->op_recall);
L
Linus Torvalds 已提交
2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871

		/*
		 * TODO: ACE's in delegations
		 */
		WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		WRITE32(0);
		WRITE32(0);
		WRITE32(0);   /* XXX: is NULL principal ok? */
		ADJUST_ARGS();
		break;
	case NFS4_OPEN_DELEGATE_WRITE:
2872 2873
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(32);
L
Linus Torvalds 已提交
2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891
		WRITE32(0);

		/*
		 * TODO: space_limit's in delegations
		 */
		WRITE32(NFS4_LIMIT_SIZE);
		WRITE32(~(u32)0);
		WRITE32(~(u32)0);

		/*
		 * TODO: ACE's in delegations
		 */
		WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
		WRITE32(0);
		WRITE32(0);
		WRITE32(0);   /* XXX: is NULL principal ok? */
		ADJUST_ARGS();
		break;
2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905
	case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
		switch (open->op_why_no_deleg) {
		case WND4_CONTENTION:
		case WND4_RESOURCE:
			RESERVE_SPACE(8);
			WRITE32(open->op_why_no_deleg);
			WRITE32(0);	/* deleg signaling not supported yet */
			break;
		default:
			RESERVE_SPACE(4);
			WRITE32(open->op_why_no_deleg);
		}
		ADJUST_ARGS();
		break;
L
Linus Torvalds 已提交
2906 2907 2908 2909 2910
	default:
		BUG();
	}
	/* XXX save filehandle here */
out:
2911
	encode_seqid_op_tail(resp, save, nfserr);
2912
	return nfserr;
L
Linus Torvalds 已提交
2913 2914
}

2915
static __be32
2916
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
L
Linus Torvalds 已提交
2917 2918
{
	ENCODE_SEQID_OP_HEAD;
2919 2920 2921

	if (!nfserr)
		nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
L
Linus Torvalds 已提交
2922

2923
	encode_seqid_op_tail(resp, save, nfserr);
2924
	return nfserr;
L
Linus Torvalds 已提交
2925 2926
}

2927
static __be32
2928
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
L
Linus Torvalds 已提交
2929 2930
{
	ENCODE_SEQID_OP_HEAD;
2931 2932 2933

	if (!nfserr)
		nfsd4_encode_stateid(resp, &od->od_stateid);
L
Linus Torvalds 已提交
2934

2935
	encode_seqid_op_tail(resp, save, nfserr);
2936
	return nfserr;
L
Linus Torvalds 已提交
2937 2938
}

2939 2940
static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2941
		  struct nfsd4_read *read)
L
Linus Torvalds 已提交
2942 2943 2944 2945 2946
{
	u32 eof;
	int v, pn;
	unsigned long maxcount; 
	long len;
2947
	__be32 *p;
L
Linus Torvalds 已提交
2948 2949 2950 2951 2952 2953 2954 2955

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;

	RESERVE_SPACE(8); /* eof flag and byte count */

2956
	maxcount = svc_max_payload(resp->rqstp);
L
Linus Torvalds 已提交
2957 2958 2959 2960 2961 2962
	if (maxcount > read->rd_length)
		maxcount = read->rd_length;

	len = maxcount;
	v = 0;
	while (len > 0) {
2963
		pn = resp->rqstp->rq_resused++;
2964
		resp->rqstp->rq_vec[v].iov_base =
2965
			page_address(resp->rqstp->rq_respages[pn]);
2966
		resp->rqstp->rq_vec[v].iov_len =
2967
			len < PAGE_SIZE ? len : PAGE_SIZE;
L
Linus Torvalds 已提交
2968 2969 2970 2971 2972
		v++;
		len -= PAGE_SIZE;
	}
	read->rd_vlen = v;

2973
	nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2974
			read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
L
Linus Torvalds 已提交
2975 2976 2977 2978
			&maxcount);

	if (nfserr)
		return nfserr;
2979 2980
	eof = (read->rd_offset + maxcount >=
	       read->rd_fhp->fh_dentry->d_inode->i_size);
L
Linus Torvalds 已提交
2981 2982 2983 2984

	WRITE32(eof);
	WRITE32(maxcount);
	ADJUST_ARGS();
2985 2986
	resp->xbuf->head[0].iov_len = (char*)p
					- (char*)resp->xbuf->head[0].iov_base;
L
Linus Torvalds 已提交
2987 2988
	resp->xbuf->page_len = maxcount;

2989 2990
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
2991 2992
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
2993 2994
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
2995 2996
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2997
		ADJUST_ARGS();
L
Linus Torvalds 已提交
2998 2999 3000 3001
	}
	return 0;
}

3002 3003
static __be32
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
L
Linus Torvalds 已提交
3004 3005 3006
{
	int maxcount;
	char *page;
3007
	__be32 *p;
L
Linus Torvalds 已提交
3008 3009 3010 3011 3012 3013

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;

3014
	page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
L
Linus Torvalds 已提交
3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032

	maxcount = PAGE_SIZE;
	RESERVE_SPACE(4);

	/*
	 * 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.
	 */
	nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
	if (nfserr == nfserr_isdir)
		return nfserr_inval;
	if (nfserr)
		return nfserr;

	WRITE32(maxcount);
	ADJUST_ARGS();
3033 3034 3035
	resp->xbuf->head[0].iov_len = (char*)p
				- (char*)resp->xbuf->head[0].iov_base;
	resp->xbuf->page_len = maxcount;
L
Linus Torvalds 已提交
3036

3037 3038
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
3039 3040
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
3041 3042
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
3043 3044
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3045
		ADJUST_ARGS();
L
Linus Torvalds 已提交
3046 3047 3048 3049
	}
	return 0;
}

3050 3051
static __be32
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
L
Linus Torvalds 已提交
3052 3053 3054
{
	int maxcount;
	loff_t offset;
A
Al Viro 已提交
3055
	__be32 *page, *savep, *tailbase;
3056
	__be32 *p;
L
Linus Torvalds 已提交
3057 3058 3059 3060 3061 3062

	if (nfserr)
		return nfserr;
	if (resp->xbuf->page_len)
		return nfserr_resource;

3063
	RESERVE_SPACE(NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3064 3065 3066 3067 3068 3069 3070
	savep = p;

	/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
	WRITE32(0);
	WRITE32(0);
	ADJUST_ARGS();
	resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3071
	tailbase = p;
L
Linus Torvalds 已提交
3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087

	maxcount = PAGE_SIZE;
	if (maxcount > readdir->rd_maxcount)
		maxcount = readdir->rd_maxcount;

	/*
	 * Convert from bytes to words, account for the two words already
	 * written, make sure to leave two words at the end for the next
	 * pointer and eof field.
	 */
	maxcount = (maxcount >> 2) - 4;
	if (maxcount < 0) {
		nfserr =  nfserr_toosmall;
		goto err_no_verf;
	}

3088
	page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
L
Linus Torvalds 已提交
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110
	readdir->common.err = 0;
	readdir->buflen = maxcount;
	readdir->buffer = page;
	readdir->offset = NULL;

	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 &&
	    readdir->buffer == page) 
		nfserr = nfserr_toosmall;
	if (nfserr)
		goto err_no_verf;

	if (readdir->offset)
		xdr_encode_hyper(readdir->offset, offset);

	p = readdir->buffer;
	*p++ = 0;	/* no more entries */
	*p++ = htonl(readdir->common.err == nfserr_eof);
3111 3112
	resp->xbuf->page_len = ((char*)p) - (char*)page_address(
		resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
L
Linus Torvalds 已提交
3113

3114 3115
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = tailbase;
L
Linus Torvalds 已提交
3116 3117
	resp->xbuf->tail[0].iov_len = 0;
	resp->p = resp->xbuf->tail[0].iov_base;
3118
	resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
L
Linus Torvalds 已提交
3119 3120 3121 3122 3123 3124 3125 3126

	return 0;
err_no_verf:
	p = savep;
	ADJUST_ARGS();
	return nfserr;
}

3127
static __be32
3128
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
L
Linus Torvalds 已提交
3129
{
3130
	__be32 *p;
L
Linus Torvalds 已提交
3131 3132 3133

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
3134
		write_cinfo(&p, &remove->rm_cinfo);
L
Linus Torvalds 已提交
3135 3136
		ADJUST_ARGS();
	}
3137
	return nfserr;
L
Linus Torvalds 已提交
3138 3139
}

3140
static __be32
3141
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
L
Linus Torvalds 已提交
3142
{
3143
	__be32 *p;
L
Linus Torvalds 已提交
3144 3145 3146

	if (!nfserr) {
		RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
3147 3148
		write_cinfo(&p, &rename->rn_sinfo);
		write_cinfo(&p, &rename->rn_tinfo);
L
Linus Torvalds 已提交
3149 3150
		ADJUST_ARGS();
	}
3151
	return nfserr;
L
Linus Torvalds 已提交
3152 3153
}

3154
static __be32
3155 3156
nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
			 __be32 nfserr,struct svc_export *exp)
A
Andy Adamson 已提交
3157 3158
{
	int i = 0;
3159 3160 3161
	u32 nflavs;
	struct exp_flavor_info *flavs;
	struct exp_flavor_info def_flavs[2];
3162
	__be32 *p;
A
Andy Adamson 已提交
3163 3164 3165

	if (nfserr)
		goto out;
3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185
	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;
		}
	}

A
Andy Adamson 已提交
3186
	RESERVE_SPACE(4);
3187
	WRITE32(nflavs);
A
Andy Adamson 已提交
3188
	ADJUST_ARGS();
3189 3190
	for (i = 0; i < nflavs; i++) {
		u32 flav = flavs[i].pseudoflavor;
A
Andy Adamson 已提交
3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216
		struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);

		if (gm) {
			RESERVE_SPACE(4);
			WRITE32(RPC_AUTH_GSS);
			ADJUST_ARGS();
			RESERVE_SPACE(4 + gm->gm_oid.len);
			WRITE32(gm->gm_oid.len);
			WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
			ADJUST_ARGS();
			RESERVE_SPACE(4);
			WRITE32(0); /* qop */
			ADJUST_ARGS();
			RESERVE_SPACE(4);
			WRITE32(gss_pseudoflavor_to_service(gm, flav));
			ADJUST_ARGS();
			gss_mech_put(gm);
		} else {
			RESERVE_SPACE(4);
			WRITE32(flav);
			ADJUST_ARGS();
		}
	}
out:
	if (exp)
		exp_put(exp);
3217
	return nfserr;
A
Andy Adamson 已提交
3218 3219
}

3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233
static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo *secinfo)
{
	return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
}

static __be32
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
		     struct nfsd4_secinfo_no_name *secinfo)
{
	return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
}

L
Linus Torvalds 已提交
3234 3235 3236 3237
/*
 * The SETATTR encode routine is special -- it always encodes a bitmap,
 * regardless of the error status.
 */
3238
static __be32
3239
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
L
Linus Torvalds 已提交
3240
{
3241
	__be32 *p;
L
Linus Torvalds 已提交
3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254

	RESERVE_SPACE(12);
	if (nfserr) {
		WRITE32(2);
		WRITE32(0);
		WRITE32(0);
	}
	else {
		WRITE32(2);
		WRITE32(setattr->sa_bmval[0]);
		WRITE32(setattr->sa_bmval[1]);
	}
	ADJUST_ARGS();
3255
	return nfserr;
L
Linus Torvalds 已提交
3256 3257
}

3258
static __be32
3259
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
L
Linus Torvalds 已提交
3260
{
3261
	__be32 *p;
L
Linus Torvalds 已提交
3262 3263

	if (!nfserr) {
3264
		RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3265
		WRITEMEM(&scd->se_clientid, 8);
3266
		WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3267 3268 3269 3270 3271 3272 3273 3274
		ADJUST_ARGS();
	}
	else if (nfserr == nfserr_clid_inuse) {
		RESERVE_SPACE(8);
		WRITE32(0);
		WRITE32(0);
		ADJUST_ARGS();
	}
3275
	return nfserr;
L
Linus Torvalds 已提交
3276 3277
}

3278
static __be32
3279
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
L
Linus Torvalds 已提交
3280
{
3281
	__be32 *p;
L
Linus Torvalds 已提交
3282 3283 3284 3285 3286

	if (!nfserr) {
		RESERVE_SPACE(16);
		WRITE32(write->wr_bytes_written);
		WRITE32(write->wr_how_written);
3287
		WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
L
Linus Torvalds 已提交
3288 3289
		ADJUST_ARGS();
	}
3290
	return nfserr;
L
Linus Torvalds 已提交
3291 3292
}

A
Andy Adamson 已提交
3293
static __be32
J
J. Bruce Fields 已提交
3294
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3295 3296
			 struct nfsd4_exchange_id *exid)
{
3297
	__be32 *p;
A
Andy Adamson 已提交
3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345
	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);

	RESERVE_SPACE(
		8 /* eir_clientid */ +
		4 /* eir_sequenceid */ +
		4 /* eir_flags */ +
		4 /* spr_how (SP4_NONE) */ +
		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) */);

	WRITEMEM(&exid->clientid, 8);
	WRITE32(exid->seqid);
	WRITE32(exid->flags);

	/* state_protect4_r. Currently only support SP4_NONE */
	BUG_ON(exid->spa_how != SP4_NONE);
	WRITE32(exid->spa_how);

	/* The server_owner struct */
	WRITE64(minor_id);      /* Minor id */
	/* major id */
	WRITE32(major_id_sz);
	WRITEMEM(major_id, major_id_sz);

	/* Server scope */
	WRITE32(server_scope_sz);
	WRITEMEM(server_scope, server_scope_sz);

	/* Implementation id */
	WRITE32(0);	/* zero length nfs_impl_id4 array */
	ADJUST_ARGS();
	return 0;
A
Andy Adamson 已提交
3346 3347 3348
}

static __be32
J
J. Bruce Fields 已提交
3349
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3350 3351
			    struct nfsd4_create_session *sess)
{
3352
	__be32 *p;
A
Andy Adamson 已提交
3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394

	if (nfserr)
		return nfserr;

	RESERVE_SPACE(24);
	WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	WRITE32(sess->seqid);
	WRITE32(sess->flags);
	ADJUST_ARGS();

	RESERVE_SPACE(28);
	WRITE32(0); /* headerpadsz */
	WRITE32(sess->fore_channel.maxreq_sz);
	WRITE32(sess->fore_channel.maxresp_sz);
	WRITE32(sess->fore_channel.maxresp_cached);
	WRITE32(sess->fore_channel.maxops);
	WRITE32(sess->fore_channel.maxreqs);
	WRITE32(sess->fore_channel.nr_rdma_attrs);
	ADJUST_ARGS();

	if (sess->fore_channel.nr_rdma_attrs) {
		RESERVE_SPACE(4);
		WRITE32(sess->fore_channel.rdma_attrs);
		ADJUST_ARGS();
	}

	RESERVE_SPACE(28);
	WRITE32(0); /* headerpadsz */
	WRITE32(sess->back_channel.maxreq_sz);
	WRITE32(sess->back_channel.maxresp_sz);
	WRITE32(sess->back_channel.maxresp_cached);
	WRITE32(sess->back_channel.maxops);
	WRITE32(sess->back_channel.maxreqs);
	WRITE32(sess->back_channel.nr_rdma_attrs);
	ADJUST_ARGS();

	if (sess->back_channel.nr_rdma_attrs) {
		RESERVE_SPACE(4);
		WRITE32(sess->back_channel.rdma_attrs);
		ADJUST_ARGS();
	}
	return 0;
A
Andy Adamson 已提交
3395 3396 3397
}

static __be32
J
J. Bruce Fields 已提交
3398
nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3399 3400 3401 3402 3403
			     struct nfsd4_destroy_session *destroy_session)
{
	return nfserr;
}

3404
static __be32
3405
nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3406 3407 3408 3409 3410 3411 3412 3413
			  struct nfsd4_free_stateid *free_stateid)
{
	__be32 *p;

	if (nfserr)
		return nfserr;

	RESERVE_SPACE(4);
3414
	*p++ = nfserr;
3415 3416 3417 3418
	ADJUST_ARGS();
	return nfserr;
}

D
Daniel Mack 已提交
3419
static __be32
J
J. Bruce Fields 已提交
3420
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
3421 3422
		      struct nfsd4_sequence *seq)
{
3423
	__be32 *p;
B
Benny Halevy 已提交
3424 3425 3426 3427 3428 3429 3430 3431

	if (nfserr)
		return nfserr;

	RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
	WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
	WRITE32(seq->seqid);
	WRITE32(seq->slotid);
3432 3433 3434
	/* Note slotid's are numbered from zero: */
	WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
	WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3435
	WRITE32(seq->status_flags);
B
Benny Halevy 已提交
3436 3437

	ADJUST_ARGS();
3438
	resp->cstate.datap = p; /* DRC cache data pointer */
B
Benny Halevy 已提交
3439
	return 0;
A
Andy Adamson 已提交
3440 3441
}

J
J. Bruce Fields 已提交
3442
static __be32
J
J. Bruce Fields 已提交
3443
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3444 3445
			  struct nfsd4_test_stateid *test_stateid)
{
3446
	struct nfsd4_test_stateid_id *stateid, *next;
3447 3448
	__be32 *p;

3449
	RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3450 3451
	*p++ = htonl(test_stateid->ts_num_ids);

3452
	list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3453
		*p++ = stateid->ts_id_status;
3454 3455
	}

3456
	ADJUST_ARGS();
3457 3458 3459
	return nfserr;
}

3460 3461 3462 3463 3464 3465 3466 3467
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
3468 3469 3470 3471 3472
/*
 * 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.
 */
3473
static nfsd4_enc nfsd4_enc_ops[] = {
3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489
	[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,
3490
	[OP_OPENATTR]		= (nfsd4_enc)nfsd4_encode_noop,
3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
	[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
3511 3512 3513

	/* NFSv4.1 operations */
	[OP_BACKCHANNEL_CTL]	= (nfsd4_enc)nfsd4_encode_noop,
3514
	[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
A
Andy Adamson 已提交
3515 3516 3517
	[OP_EXCHANGE_ID]	= (nfsd4_enc)nfsd4_encode_exchange_id,
	[OP_CREATE_SESSION]	= (nfsd4_enc)nfsd4_encode_create_session,
	[OP_DESTROY_SESSION]	= (nfsd4_enc)nfsd4_encode_destroy_session,
3518
	[OP_FREE_STATEID]	= (nfsd4_enc)nfsd4_encode_free_stateid,
A
Andy Adamson 已提交
3519 3520 3521 3522 3523 3524
	[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,
3525
	[OP_SECINFO_NO_NAME]	= (nfsd4_enc)nfsd4_encode_secinfo_no_name,
A
Andy Adamson 已提交
3526 3527
	[OP_SEQUENCE]		= (nfsd4_enc)nfsd4_encode_sequence,
	[OP_SET_SSV]		= (nfsd4_enc)nfsd4_encode_noop,
3528
	[OP_TEST_STATEID]	= (nfsd4_enc)nfsd4_encode_test_stateid,
A
Andy Adamson 已提交
3529 3530 3531
	[OP_WANT_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DESTROY_CLIENTID]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RECLAIM_COMPLETE]	= (nfsd4_enc)nfsd4_encode_noop,
3532 3533
};

3534 3535
/*
 * Calculate the total amount of memory that the compound response has taken
3536
 * after encoding the current operation with pad.
3537
 *
3538 3539
 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
 *      which was specified at nfsd4_operation, else pad is zero.
3540
 *
3541
 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3542 3543 3544 3545
 *
 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
 * will be at least a page and will therefore hold the xdr_buf head.
 */
J
J. Bruce Fields 已提交
3546
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3547 3548 3549 3550
{
	struct xdr_buf *xb = &resp->rqstp->rq_res;
	struct nfsd4_session *session = NULL;
	struct nfsd4_slot *slot = resp->cstate.slot;
3551
	u32 length, tlen = 0;
3552 3553

	if (!nfsd4_has_session(&resp->cstate))
3554
		return 0;
3555 3556

	session = resp->cstate.session;
3557 3558
	if (session == NULL)
		return 0;
3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570

	if (xb->page_len == 0) {
		length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
	} else {
		if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
			tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;

		length = xb->head[0].iov_len + xb->page_len + tlen + pad;
	}
	dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
		length, xb->page_len, tlen, pad);

3571 3572 3573
	if (length > session->se_fchannel.maxresp_sz)
		return nfserr_rep_too_big;

3574
	if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3575
	    length > session->se_fchannel.maxresp_cached)
3576
		return nfserr_rep_too_big_to_cache;
3577 3578

	return 0;
3579 3580
}

L
Linus Torvalds 已提交
3581 3582 3583
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
A
Al Viro 已提交
3584
	__be32 *statp;
3585
	__be32 *p;
L
Linus Torvalds 已提交
3586 3587 3588 3589 3590 3591

	RESERVE_SPACE(8);
	WRITE32(op->opnum);
	statp = p++;	/* to be backfilled at the end */
	ADJUST_ARGS();

3592 3593 3594 3595 3596
	if (op->opnum == OP_ILLEGAL)
		goto status;
	BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
	       !nfsd4_enc_ops[op->opnum]);
	op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3597
	/* nfsd4_check_drc_limit guarantees enough room for error status */
3598 3599
	if (!op->status)
		op->status = nfsd4_check_resp_size(resp, 0);
3600
status:
L
Linus Torvalds 已提交
3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618
	/*
	 * Note: We write the status directly, instead of using WRITE32(),
	 * since it is already in network byte order.
	 */
	*statp = op->status;
}

/* 
 * 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.
 *
 * called with nfs4_lock_state() held
 */
void
nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
3619
	__be32 *p;
L
Linus Torvalds 已提交
3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634
	struct nfs4_replay *rp = op->replay;

	BUG_ON(!rp);

	RESERVE_SPACE(8);
	WRITE32(op->opnum);
	*p++ = rp->rp_status;  /* already xdr'ed */
	ADJUST_ARGS();

	RESERVE_SPACE(rp->rp_buflen);
	WRITEMEM(rp->rp_buf, rp->rp_buflen);
	ADJUST_ARGS();
}

int
A
Al Viro 已提交
3635
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
3636 3637 3638 3639
{
        return xdr_ressize_check(rqstp, p);
}

3640
int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
L
Linus Torvalds 已提交
3641
{
3642 3643 3644
	struct svc_rqst *rqstp = rq;
	struct nfsd4_compoundargs *args = rqstp->rq_argp;

L
Linus Torvalds 已提交
3645 3646 3647 3648
	if (args->ops != args->iops) {
		kfree(args->ops);
		args->ops = args->iops;
	}
J
Jesper Juhl 已提交
3649 3650
	kfree(args->tmpp);
	args->tmpp = NULL;
L
Linus Torvalds 已提交
3651 3652 3653 3654 3655 3656
	while (args->to_free) {
		struct tmpbuf *tb = args->to_free;
		args->to_free = tb->next;
		tb->release(tb->buf);
		kfree(tb);
	}
3657
	return 1;
L
Linus Torvalds 已提交
3658 3659 3660
}

int
A
Al Viro 已提交
3661
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
L
Linus Torvalds 已提交
3662 3663 3664 3665 3666 3667 3668 3669 3670 3671
{
	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;

3672
	return !nfsd4_decode_compound(args);
L
Linus Torvalds 已提交
3673 3674 3675
}

int
A
Al Viro 已提交
3676
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
L
Linus Torvalds 已提交
3677 3678 3679 3680
{
	/*
	 * All that remains is to write the tag and operation count...
	 */
3681
	struct nfsd4_compound_state *cs = &resp->cstate;
L
Linus Torvalds 已提交
3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694
	struct kvec *iov;
	p = resp->tagp;
	*p++ = htonl(resp->taglen);
	memcpy(p, resp->tag, resp->taglen);
	p += XDR_QUADLEN(resp->taglen);
	*p++ = htonl(resp->opcnt);

	if (rqstp->rq_res.page_len) 
		iov = &rqstp->rq_res.tail[0];
	else
		iov = &rqstp->rq_res.head[0];
	iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
	BUG_ON(iov->iov_len > PAGE_SIZE);
3695 3696 3697
	if (nfsd4_has_session(cs)) {
		if (cs->status != nfserr_replay_cache) {
			nfsd4_store_cache_entry(resp);
3698
			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3699
		}
3700 3701
		/* Renew the clientid on success and on replay */
		release_session_client(cs->session);
3702
		nfsd4_put_session(cs->session);
A
Andy Adamson 已提交
3703
	}
L
Linus Torvalds 已提交
3704 3705 3706 3707 3708 3709 3710 3711
	return 1;
}

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