nfs4xdr.c 82.7 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/nfsd_idmap.h>
#include <linux/nfs4_acl.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#include "xdr4.h"
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#include "vfs.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 = kmalloc(nbytes, GFP_KERNEL);
		if (!p)
			return NULL;
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		memcpy(p, argp->tmp, nbytes);
	} 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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			host_err = 0;
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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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				host_err = nfsd_map_name_to_gid(argp->rqstp,
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						buf, dummy32, &ace->who);
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			else
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				host_err = nfsd_map_name_to_uid(argp->rqstp,
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						buf, dummy32, &ace->who);
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			if (host_err)
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				goto out_nfserr;
		}
	} 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 ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
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			goto out_nfserr;
		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 ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
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			goto out_nfserr;
		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
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nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
	DECODE_HEAD;

	close->cl_stateowner = NULL;
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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;
}

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static __be32
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nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
{
	DECODE_HEAD;

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	lock->lk_replay_owner = NULL;
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	/*
	* 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) {
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		READ_BUF(4);
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		READ32(lock->lk_new_open_seqid);
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		status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
		if (status)
			return status;
		READ_BUF(8 + sizeof(clientid_t));
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		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 {
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		status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
		if (status)
			return status;
		READ_BUF(4);
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		READ32(lock->lk_old_lock_seqid);
	}

	DECODE_TAIL;
}

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static __be32
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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);

A
Andy Adamson 已提交
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	if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
		return nfserr_inval;
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577 578 579
	DECODE_TAIL;
}

580
static __be32
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nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
	DECODE_HEAD;

	locku->lu_stateowner = NULL;
586
	READ_BUF(8);
L
Linus Torvalds 已提交
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	READ32(locku->lu_type);
	if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
		goto xdr_error;
	READ32(locku->lu_seqid);
591 592 593 594
	status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
	if (status)
		return status;
	READ_BUF(16);
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	READ64(locku->lu_offset);
	READ64(locku->lu_length);

	DECODE_TAIL;
}

601
static __be32
L
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602 603 604 605 606 607 608 609 610 611 612 613 614 615
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;
}

616
static __be32
L
Linus Torvalds 已提交
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
	DECODE_HEAD;

	memset(open->op_bmval, 0, sizeof(open->op_bmval));
	open->op_iattr.ia_valid = 0;
	open->op_stateowner = NULL;

	/* seqid, share_access, share_deny, clientid, ownerlen */
	READ_BUF(16 + sizeof(clientid_t));
	READ32(open->op_seqid);
	READ32(open->op_share_access);
	READ32(open->op_share_deny);
	COPYMEM(&open->op_clientid, sizeof(clientid_t));
	READ32(open->op_owner.len);

	/* owner, open_flag */
	READ_BUF(open->op_owner.len + 4);
	SAVEMEM(open->op_owner.data, open->op_owner.len);
	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:
646
			status = nfsd4_decode_fattr(argp, open->op_bmval,
647
				&open->op_iattr, &open->op_acl);
648
			if (status)
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				goto out;
			break;
		case NFS4_CREATE_EXCLUSIVE:
			READ_BUF(8);
			COPYMEM(open->op_verf.data, 8);
			break;
B
Benny Halevy 已提交
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		case NFS4_CREATE_EXCLUSIVE4_1:
			if (argp->minorversion < 1)
				goto xdr_error;
			READ_BUF(8);
			COPYMEM(open->op_verf.data, 8);
			status = nfsd4_decode_fattr(argp, open->op_bmval,
661
				&open->op_iattr, &open->op_acl);
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			if (status)
				goto out;
			break;
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		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:
691 692 693 694
		status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
		if (status)
			return status;
		READ_BUF(4);
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		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;
	default:
		goto xdr_error;
	}

	DECODE_TAIL;
}

708
static __be32
L
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709 710 711 712 713
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
	DECODE_HEAD;
		    
	open_conf->oc_stateowner = NULL;
714 715 716 717
	status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
	if (status)
		return status;
	READ_BUF(4);
L
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	READ32(open_conf->oc_seqid);
						        
	DECODE_TAIL;
}

723
static __be32
L
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724 725 726 727 728
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
	DECODE_HEAD;
		    
	open_down->od_stateowner = NULL;
729 730 731 732
	status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
	if (status)
		return status;
	READ_BUF(12);
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Linus Torvalds 已提交
733 734 735 736 737 738 739
	READ32(open_down->od_seqid);
	READ32(open_down->od_share_access);
	READ32(open_down->od_share_deny);
						        
	DECODE_TAIL;
}

740
static __be32
L
Linus Torvalds 已提交
741 742 743 744 745 746 747 748 749 750 751 752 753 754
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;
}

755
static __be32
L
Linus Torvalds 已提交
756 757 758 759
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
	DECODE_HEAD;

760 761 762 763
	status = nfsd4_decode_stateid(argp, &read->rd_stateid);
	if (status)
		return status;
	READ_BUF(12);
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	READ64(read->rd_offset);
	READ32(read->rd_length);

	DECODE_TAIL;
}

770
static __be32
L
Linus Torvalds 已提交
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
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;
}

786
static __be32
L
Linus Torvalds 已提交
787 788 789 790 791 792 793 794 795 796 797 798 799 800
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;
}

801
static __be32
L
Linus Torvalds 已提交
802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
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;
}

821
static __be32
L
Linus Torvalds 已提交
822 823 824 825 826 827 828 829 830 831
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
	DECODE_HEAD;

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

	DECODE_TAIL;
}

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Andy Adamson 已提交
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848
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;
}

849
static __be32
L
Linus Torvalds 已提交
850 851
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
852
	__be32 status;
L
Linus Torvalds 已提交
853

854 855 856
	status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
	if (status)
		return status;
857 858
	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
				  &setattr->sa_acl);
L
Linus Torvalds 已提交
859 860
}

861
static __be32
L
Linus Torvalds 已提交
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
{
	DECODE_HEAD;

	READ_BUF(12);
	COPYMEM(setclientid->se_verf.data, 8);
	READ32(setclientid->se_namelen);

	READ_BUF(setclientid->se_namelen + 8);
	SAVEMEM(setclientid->se_name, setclientid->se_namelen);
	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;
}

886
static __be32
L
Linus Torvalds 已提交
887 888 889 890 891 892 893 894 895 896 897 898
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
{
	DECODE_HEAD;

	READ_BUF(8 + sizeof(nfs4_verifier));
	COPYMEM(&scd_c->sc_clientid, 8);
	COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));

	DECODE_TAIL;
}

/* Also used for NVERIFY */
899
static __be32
L
Linus Torvalds 已提交
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
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;
}

935
static __be32
L
Linus Torvalds 已提交
936 937 938 939 940 941 942
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
	int avail;
	int v;
	int len;
	DECODE_HEAD;

943 944 945 946
	status = nfsd4_decode_stateid(argp, &write->wr_stateid);
	if (status)
		return status;
	READ_BUF(16);
L
Linus Torvalds 已提交
947 948 949 950 951 952 953 954 955 956 957 958
	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) {
959 960
		dprintk("NFSD: xdr error (%s:%d)\n",
				__FILE__, __LINE__);
L
Linus Torvalds 已提交
961 962
		goto xdr_error;
	}
963 964
	argp->rqstp->rq_vec[0].iov_base = p;
	argp->rqstp->rq_vec[0].iov_len = avail;
L
Linus Torvalds 已提交
965 966
	v = 0;
	len = write->wr_buflen;
967 968
	while (len > argp->rqstp->rq_vec[v].iov_len) {
		len -= argp->rqstp->rq_vec[v].iov_len;
L
Linus Torvalds 已提交
969
		v++;
970
		argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
L
Linus Torvalds 已提交
971 972
		argp->pagelist++;
		if (argp->pagelen >= PAGE_SIZE) {
973
			argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
L
Linus Torvalds 已提交
974 975
			argp->pagelen -= PAGE_SIZE;
		} else {
976
			argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
L
Linus Torvalds 已提交
977 978 979
			argp->pagelen -= len;
		}
	}
A
Al Viro 已提交
980 981
	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));
982
	argp->rqstp->rq_vec[v].iov_len = len;
L
Linus Torvalds 已提交
983 984 985 986 987
	write->wr_vlen = v+1;

	DECODE_TAIL;
}

988
static __be32
L
Linus Torvalds 已提交
989 990 991 992 993 994 995 996 997 998
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
999 1000
	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
		return nfserr_inval;
L
Linus Torvalds 已提交
1001 1002 1003
	DECODE_TAIL;
}

A
Andy Adamson 已提交
1004 1005
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
A
Andy Adamson 已提交
1006
			 struct nfsd4_exchange_id *exid)
A
Andy Adamson 已提交
1007
{
1008
	int dummy, tmp;
A
Andy Adamson 已提交
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
	DECODE_HEAD;

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

	READ_BUF(4);
	READ32(exid->clname.len);

	READ_BUF(exid->clname.len);
	SAVEMEM(exid->clname.data, exid->clname.len);

	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);
1056 1057 1058 1059 1060 1061 1062
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1063 1064 1065

		/* ssp_encr_algs<> */
		READ_BUF(4);
1066 1067 1068 1069 1070 1071 1072
		READ32(tmp);
		while (tmp--) {
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy);
			p += XDR_QUADLEN(dummy);
		}
A
Andy Adamson 已提交
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107

		/* 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
1108 1109 1110 1111 1112 1113
}

static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
			    struct nfsd4_create_session *sess)
{
A
Andy Adamson 已提交
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	DECODE_HEAD;

	u32 dummy;
	char *machine_name;
	int i;
	int nr_secflavs;

	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;
	}

	READ_BUF(8);
	READ32(sess->callback_prog);

	/* callback_sec_params4 */
	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(sess->uid);
			READ32(sess->gid);

			/* more gids */
			READ_BUF(4);
			READ32(dummy);
			READ_BUF(dummy * 4);
			for (i = 0; i < dummy; ++i)
				READ32(dummy);
			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);
			p += XDR_QUADLEN(dummy);
			break;
		default:
			dprintk("Illegal callback secflavor\n");
			return nfserr_inval;
		}
	}
	DECODE_TAIL;
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}

static __be32
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
			     struct nfsd4_destroy_session *destroy_session)
{
B
Benny Halevy 已提交
1222 1223 1224 1225 1226
	DECODE_HEAD;
	READ_BUF(NFS4_MAX_SESSIONID_LEN);
	COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);

	DECODE_TAIL;
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}

static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
		      struct nfsd4_sequence *seq)
{
B
Benny Halevy 已提交
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
	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;
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Andy Adamson 已提交
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}

1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
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;
}

1255 1256 1257 1258 1259 1260
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
	return nfs_ok;
}

1261 1262 1263
static __be32
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
{
1264
	return nfserr_notsupp;
1265 1266
}

1267 1268 1269
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);

static nfsd4_dec nfsd4_dec_ops[] = {
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
	[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,
1290
	[OP_PUTPUBFH]		= (nfsd4_dec)nfsd4_decode_noop,
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
	[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,
1307 1308
};

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Andy Adamson 已提交
1309
static nfsd4_dec nfsd41_dec_ops[] = {
R
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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 1342 1343 1344 1345 1346
	[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,
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	/* new operations for NFSv4.1 */
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	[OP_BACKCHANNEL_CTL]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
	[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,
	[OP_FREE_STATEID]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[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,
	[OP_SECINFO_NO_NAME]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_SEQUENCE]		= (nfsd4_dec)nfsd4_decode_sequence,
	[OP_SET_SSV]		= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_TEST_STATEID]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_WANT_DELEGATION]	= (nfsd4_dec)nfsd4_decode_notsupp,
	[OP_DESTROY_CLIENTID]	= (nfsd4_dec)nfsd4_decode_notsupp,
1367
	[OP_RECLAIM_COMPLETE]	= (nfsd4_dec)nfsd4_decode_reclaim_complete,
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Andy Adamson 已提交
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};

1370 1371 1372 1373 1374 1375
struct nfsd4_minorversion_ops {
	nfsd4_dec *decoders;
	int nops;
};

static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1376
	[0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
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Andy Adamson 已提交
1377
	[1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1378 1379
};

1380
static __be32
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Linus Torvalds 已提交
1381 1382 1383 1384
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
	DECODE_HEAD;
	struct nfsd4_op *op;
1385
	struct nfsd4_minorversion_ops *ops;
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	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;

1406
	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
L
Linus Torvalds 已提交
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		argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
		if (!argp->ops) {
			argp->ops = argp->iops;
1410
			dprintk("nfsd: couldn't allocate room for COMPOUND\n");
L
Linus Torvalds 已提交
1411 1412 1413 1414
			goto xdr_error;
		}
	}

1415
	if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1416 1417
		argp->opcnt = 0;

1418
	ops = &nfsd4_minorversion[argp->minorversion];
L
Linus Torvalds 已提交
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	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
1447
				argp->end = argp->p + (argp->pagelen>>2);
L
Linus Torvalds 已提交
1448 1449
				argp->pagelen = 0;
			} else {
N
Neil Brown 已提交
1450
				argp->end = argp->p + (PAGE_SIZE>>2);
L
Linus Torvalds 已提交
1451 1452 1453 1454 1455
				argp->pagelen -= PAGE_SIZE;
			}
		}
		op->opnum = ntohl(*argp->p++);

1456
		if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1457
			op->status = ops->decoders[op->opnum](argp, &op->u);
1458
		else {
L
Linus Torvalds 已提交
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
			op->opnum = OP_ILLEGAL;
			op->status = nfserr_op_illegal;
		}

		if (op->status) {
			argp->opcnt = i+1;
			break;
		}
	}

	DECODE_TAIL;
}

#define WRITE32(n)               *p++ = htonl(n)
#define WRITE64(n)               do {				\
	*p++ = htonl((u32)((n) >> 32));				\
	*p++ = htonl((u32)(n));					\
} while (0)
1477
#define WRITEMEM(ptr,nbytes)     do { if (nbytes > 0) {		\
L
Linus Torvalds 已提交
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	*(p + XDR_QUADLEN(nbytes) -1) = 0;                      \
	memcpy(p, ptr, nbytes);					\
	p += XDR_QUADLEN(nbytes);				\
1481
}} while (0)
J
J. Bruce Fields 已提交
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static void write32(__be32 **p, u32 n)
{
	*(*p)++ = n;
}

static void write64(__be32 **p, u64 n)
{
	write32(p, (u32)(n >> 32));
	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
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#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
1528
	__be32 *save;						\
L
Linus Torvalds 已提交
1529 1530 1531 1532
								\
	save = resp->p;

/*
N
NeilBrown 已提交
1533 1534 1535 1536
 * 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
1537 1538 1539 1540
 */

#define ENCODE_SEQID_OP_TAIL(stateowner) do {			\
	if (seqid_mutating_err(nfserr) && stateowner) { 	\
1541
		stateowner->so_seqid++;				\
L
Linus Torvalds 已提交
1542 1543 1544 1545 1546 1547 1548
		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); 	\
	} } while (0);

1549
/* Encode as an array of strings the string given with components
D
Daniel Mack 已提交
1550
 * separated @sep.
1551
 */
1552
static __be32 nfsd4_encode_components(char sep, char *components,
A
Al Viro 已提交
1553
				   __be32 **pp, int *buflen)
1554
{
A
Al Viro 已提交
1555 1556
	__be32 *p = *pp;
	__be32 *countp = p;
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
	int strlen, count=0;
	char *str, *end;

	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) {
		for (; *end && (*end != sep); end++)
			; /* Point to end of component */
		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;
}

/*
 * encode a location element of a fs_locations structure
 */
1589
static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
A
Al Viro 已提交
1590
				    __be32 **pp, int *buflen)
1591
{
1592
	__be32 status;
A
Al Viro 已提交
1593
	__be32 *p = *pp;
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609

	status = nfsd4_encode_components(':', location->hosts, &p, buflen);
	if (status)
		return status;
	status = nfsd4_encode_components('/', location->path, &p, buflen);
	if (status)
		return status;
	*pp = p;
	return 0;
}

/*
 * Return the path to an export point in the pseudo filesystem namespace
 * Returned string is safe to use as long as the caller holds a reference
 * to @exp.
 */
1610
static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1611 1612
{
	struct svc_fh tmp_fh;
1613 1614
	char *path = NULL, *rootpath;
	size_t rootlen;
1615 1616

	fh_init(&tmp_fh, NFS4_FHSIZE);
1617
	*stat = exp_pseudoroot(rqstp, &tmp_fh);
1618 1619
	if (*stat)
		return NULL;
1620
	rootpath = tmp_fh.fh_export->ex_pathname;
1621

1622
	path = exp->ex_pathname;
1623

1624 1625
	rootlen = strlen(rootpath);
	if (strncmp(path, rootpath, rootlen)) {
1626
		dprintk("nfsd: fs_locations failed;"
1627
			"%s is not contained in %s\n", path, rootpath);
1628
		*stat = nfserr_notsupp;
1629 1630
		path = NULL;
		goto out;
1631
	}
1632 1633 1634 1635
	path += rootlen;
out:
	fh_put(&tmp_fh);
	return path;
1636 1637 1638 1639 1640
}

/*
 *  encode a fs_locations structure
 */
1641
static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1642
				     struct svc_export *exp,
A
Al Viro 已提交
1643
				     __be32 **pp, int *buflen)
1644
{
1645
	__be32 status;
1646
	int i;
A
Al Viro 已提交
1647
	__be32 *p = *pp;
1648
	struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1649
	char *root = nfsd4_path(rqstp, exp, &status);
1650

1651 1652
	if (status)
		return status;
1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667
	status = nfsd4_encode_components('/', root, &p, buflen);
	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
1668 1669 1670 1671 1672 1673 1674 1675

static u32 nfs4_ftypes[16] = {
        NF4BAD,  NF4FIFO, NF4CHR, NF4BAD,
        NF4DIR,  NF4BAD,  NF4BLK, NF4BAD,
        NF4REG,  NF4BAD,  NF4LNK, NF4BAD,
        NF4SOCK, NF4BAD,  NF4LNK, NF4BAD,
};

1676
static __be32
L
Linus Torvalds 已提交
1677
nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
A
Al Viro 已提交
1678
			__be32 **p, int *buflen)
L
Linus Torvalds 已提交
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697
{
	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;
}

1698
static inline __be32
A
Al Viro 已提交
1699
nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1700 1701 1702 1703
{
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
}

1704
static inline __be32
A
Al Viro 已提交
1705
nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
L
Linus Torvalds 已提交
1706 1707 1708 1709
{
	return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
}

1710
static inline __be32
L
Linus Torvalds 已提交
1711
nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
A
Al Viro 已提交
1712
		__be32 **p, int *buflen)
L
Linus Torvalds 已提交
1713 1714 1715 1716
{
	return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
}

1717 1718 1719 1720
#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

1721
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735
{
	/* 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
1736 1737 1738 1739 1740 1741 1742 1743

/*
 * 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.
 */
1744
__be32
L
Linus Torvalds 已提交
1745
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
A
Al Viro 已提交
1746
		struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1747
		struct svc_rqst *rqstp, int ignore_crossmnt)
L
Linus Torvalds 已提交
1748 1749 1750
{
	u32 bmval0 = bmval[0];
	u32 bmval1 = bmval[1];
1751
	u32 bmval2 = bmval[2];
L
Linus Torvalds 已提交
1752 1753 1754 1755
	struct kstat stat;
	struct svc_fh tempfh;
	struct kstatfs statfs;
	int buflen = *countp << 2;
A
Al Viro 已提交
1756
	__be32 *attrlenp;
L
Linus Torvalds 已提交
1757 1758
	u32 dummy;
	u64 dummy64;
1759
	u32 rdattr_err = 0;
A
Al Viro 已提交
1760
	__be32 *p = buffer;
1761
	__be32 status;
1762
	int err;
L
Linus Torvalds 已提交
1763 1764
	int aclsupport = 0;
	struct nfs4_acl *acl = NULL;
1765 1766
	struct nfsd4_compoundres *resp = rqstp->rq_resp;
	u32 minorversion = resp->cstate.minorversion;
1767 1768 1769 1770
	struct path path = {
		.mnt	= exp->ex_path.mnt,
		.dentry	= dentry,
	};
L
Linus Torvalds 已提交
1771 1772

	BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1773 1774 1775
	BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
	BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
	BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
L
Linus Torvalds 已提交
1776

1777
	if (exp->ex_fslocs.migrated) {
1778
		BUG_ON(bmval[2]);
1779 1780 1781 1782 1783
		status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
		if (status)
			goto out;
	}

1784
	err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1785
	if (err)
L
Linus Torvalds 已提交
1786
		goto out_nfserr;
1787 1788
	if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
			FATTR4_WORD0_MAXNAME)) ||
L
Linus Torvalds 已提交
1789 1790
	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
		       FATTR4_WORD1_SPACE_TOTAL))) {
1791
		err = vfs_statfs(&path, &statfs);
1792
		if (err)
L
Linus Torvalds 已提交
1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803
			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)) {
1804 1805
		err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
		aclsupport = (err == 0);
L
Linus Torvalds 已提交
1806
		if (bmval0 & FATTR4_WORD0_ACL) {
1807
			if (err == -EOPNOTSUPP)
L
Linus Torvalds 已提交
1808
				bmval0 &= ~FATTR4_WORD0_ACL;
1809
			else if (err == -EINVAL) {
L
Linus Torvalds 已提交
1810 1811
				status = nfserr_attrnotsupp;
				goto out;
1812
			} else if (err != 0)
L
Linus Torvalds 已提交
1813 1814 1815 1816
				goto out_nfserr;
		}
	}

1817 1818 1819
	if (bmval2) {
		if ((buflen -= 16) < 0)
			goto out_resource;
1820 1821 1822 1823
		WRITE32(3);
		WRITE32(bmval0);
		WRITE32(bmval1);
		WRITE32(bmval2);
1824 1825 1826
	} else if (bmval1) {
		if ((buflen -= 12) < 0)
			goto out_resource;
1827 1828 1829 1830
		WRITE32(2);
		WRITE32(bmval0);
		WRITE32(bmval1);
	} else {
1831 1832
		if ((buflen -= 8) < 0)
			goto out_resource;
1833 1834 1835
		WRITE32(1);
		WRITE32(bmval0);
	}
L
Linus Torvalds 已提交
1836 1837 1838
	attrlenp = p++;                /* to be backfilled later */

	if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1839 1840 1841 1842
		u32 word0 = nfsd_suppattrs0(minorversion);
		u32 word1 = nfsd_suppattrs1(minorversion);
		u32 word2 = nfsd_suppattrs2(minorversion);

1843 1844
		if (!aclsupport)
			word0 &= ~FATTR4_WORD0_ACL;
1845
		if (!word2) {
1846 1847
			if ((buflen -= 12) < 0)
				goto out_resource;
1848 1849 1850 1851
			WRITE32(2);
			WRITE32(word0);
			WRITE32(word1);
		} else {
1852 1853
			if ((buflen -= 16) < 0)
				goto out_resource;
1854 1855 1856 1857 1858
			WRITE32(3);
			WRITE32(word0);
			WRITE32(word1);
			WRITE32(word2);
		}
L
Linus Torvalds 已提交
1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870
	}
	if (bmval0 & FATTR4_WORD0_TYPE) {
		if ((buflen -= 4) < 0)
			goto out_resource;
		dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
		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
1871
		if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
N
NeilBrown 已提交
1872
			WRITE32(NFS4_FH_PERSISTENT);
N
NeilBrown 已提交
1873
		else
N
NeilBrown 已提交
1874
			WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
L
Linus Torvalds 已提交
1875 1876 1877 1878
	}
	if (bmval0 & FATTR4_WORD0_CHANGE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
J
J. Bruce Fields 已提交
1879
		write_change(&p, &stat, dentry->d_inode);
L
Linus Torvalds 已提交
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903
	}
	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;
1904 1905 1906
		if (exp->ex_fslocs.migrated) {
			WRITE64(NFS4_REFERRAL_FSID_MAJOR);
			WRITE64(NFS4_REFERRAL_FSID_MINOR);
1907 1908
		} else switch(fsid_source(fhp)) {
		case FSIDSOURCE_FSID:
L
Linus Torvalds 已提交
1909 1910
			WRITE64((u64)exp->ex_fsid);
			WRITE64((u64)0);
1911 1912
			break;
		case FSIDSOURCE_DEV:
L
Linus Torvalds 已提交
1913 1914 1915 1916
			WRITE32(0);
			WRITE32(MAJOR(stat.dev));
			WRITE32(0);
			WRITE32(MINOR(stat.dev));
1917 1918 1919 1920
			break;
		case FSIDSOURCE_UUID:
			WRITEMEM(exp->ex_uuid, 16);
			break;
L
Linus Torvalds 已提交
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
		}
	}
	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;
1931
		WRITE32(nfsd4_lease);
L
Linus Torvalds 已提交
1932 1933 1934 1935
	}
	if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
		if ((buflen -= 4) < 0)
			goto out_resource;
1936
		WRITE32(rdattr_err);
L
Linus Torvalds 已提交
1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
	}
	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);

1952
		for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
L
Linus Torvalds 已提交
1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
			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;
		WRITE32(1);
	}
	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;
2004
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
	}
	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);
	}
2021 2022 2023 2024 2025 2026 2027
	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
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045
	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;
2046
		WRITE32(statfs.f_namelen);
L
Linus Torvalds 已提交
2047 2048 2049 2050
	}
	if (bmval0 & FATTR4_WORD0_MAXREAD) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2051
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2052 2053 2054 2055
	}
	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
		if ((buflen -= 8) < 0)
			goto out_resource;
2056
		WRITE64((u64) svc_max_payload(rqstp));
L
Linus Torvalds 已提交
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147
	}
	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;
2148 2149 2150 2151 2152
		/*
		 * Get parent's attributes if not ignoring crossmount
		 * and this is the root of a cross-mounted filesystem.
		 */
		if (ignore_crossmnt == 0 &&
A
Al Viro 已提交
2153 2154 2155 2156 2157 2158 2159 2160 2161
		    dentry == exp->ex_path.mnt->mnt_root) {
			struct path path = exp->ex_path;
			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);
2162 2163 2164 2165
			if (err)
				goto out_nfserr;
		}
		WRITE64(stat.ino);
L
Linus Torvalds 已提交
2166
	}
2167 2168 2169 2170 2171 2172
	if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
		WRITE32(3);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
		WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
	}
2173

L
Linus Torvalds 已提交
2174 2175 2176 2177 2178
	*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
	*countp = p - buffer;
	status = nfs_ok;

out:
2179
	kfree(acl);
L
Linus Torvalds 已提交
2180 2181 2182 2183
	if (fhp == &tempfh)
		fh_put(&tempfh);
	return status;
out_nfserr:
2184
	status = nfserrno(err);
L
Linus Torvalds 已提交
2185 2186 2187 2188 2189 2190 2191 2192 2193 2194
	goto out;
out_resource:
	*countp = 0;
	status = nfserr_resource;
	goto out;
out_serverfault:
	status = nfserr_serverfault;
	goto out;
}

2195 2196 2197 2198 2199 2200 2201 2202 2203
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;
}

2204
static __be32
L
Linus Torvalds 已提交
2205
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
A
Al Viro 已提交
2206
		const char *name, int namlen, __be32 *p, int *buflen)
L
Linus Torvalds 已提交
2207 2208 2209
{
	struct svc_export *exp = cd->rd_fhp->fh_export;
	struct dentry *dentry;
2210
	__be32 nfserr;
2211
	int ignore_crossmnt = 0;
L
Linus Torvalds 已提交
2212 2213 2214 2215

	dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
	if (IS_ERR(dentry))
		return nfserrno(PTR_ERR(dentry));
2216 2217 2218 2219 2220 2221 2222 2223 2224
	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
2225 2226

	exp_get(exp);
2227 2228 2229 2230 2231 2232 2233
	/*
	 * 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.
	 */
2234
	if (nfsd_mountpoint(dentry, exp)) {
2235 2236
		int err;

2237 2238 2239 2240 2241
		if (!(exp->ex_flags & NFSEXP_V4ROOT)
				&& !attributes_need_mount(cd->rd_bmval)) {
			ignore_crossmnt = 1;
			goto out_encode;
		}
A
Andy Adamson 已提交
2242 2243 2244 2245 2246
		/*
		 * Why the heck aren't we just using nfsd_lookup??
		 * Different "."/".." handling?  Something else?
		 * At least, add a comment here to explain....
		 */
2247 2248 2249
		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
		if (err) {
			nfserr = nfserrno(err);
L
Linus Torvalds 已提交
2250 2251
			goto out_put;
		}
A
Andy Adamson 已提交
2252 2253 2254
		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
		if (nfserr)
			goto out_put;
L
Linus Torvalds 已提交
2255 2256

	}
2257
out_encode:
L
Linus Torvalds 已提交
2258
	nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2259
					cd->rd_rqstp, ignore_crossmnt);
L
Linus Torvalds 已提交
2260 2261 2262 2263 2264 2265
out_put:
	dput(dentry);
	exp_put(exp);
	return nfserr;
}

A
Al Viro 已提交
2266
static __be32 *
2267
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
L
Linus Torvalds 已提交
2268
{
A
Al Viro 已提交
2269
	__be32 *attrlenp;
L
Linus Torvalds 已提交
2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283

	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
2284 2285
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
2286
{
2287
	struct readdir_cd *ccd = ccdv;
L
Linus Torvalds 已提交
2288 2289
	struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
	int buflen;
A
Al Viro 已提交
2290
	__be32 *p = cd->buffer;
2291
	__be32 *cookiep;
2292
	__be32 nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307

	/* 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 */
2308
	cookiep = p;
L
Linus Torvalds 已提交
2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321
	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;
	case nfserr_dropit:
		goto fail;
2322 2323
	case nfserr_noent:
		goto skip_entry;
L
Linus Torvalds 已提交
2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334
	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);
2335 2336
		if (p == NULL) {
			nfserr = nfserr_toosmall;
L
Linus Torvalds 已提交
2337
			goto fail;
2338
		}
L
Linus Torvalds 已提交
2339 2340 2341
	}
	cd->buflen -= (p - cd->buffer);
	cd->buffer = p;
2342 2343
	cd->offset = cookiep;
skip_entry:
L
Linus Torvalds 已提交
2344 2345 2346 2347 2348 2349 2350
	cd->common.err = nfs_ok;
	return 0;
fail:
	cd->common.err = nfserr;
	return -EINVAL;
}

2351 2352 2353
static void
nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
{
2354
	__be32 *p;
2355 2356 2357 2358 2359 2360 2361

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

2362
static __be32
2363
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
L
Linus Torvalds 已提交
2364
{
2365
	__be32 *p;
L
Linus Torvalds 已提交
2366 2367 2368 2369 2370 2371 2372

	if (!nfserr) {
		RESERVE_SPACE(8);
		WRITE32(access->ac_supported);
		WRITE32(access->ac_resp_access);
		ADJUST_ARGS();
	}
2373
	return nfserr;
L
Linus Torvalds 已提交
2374 2375
}

2376
static __be32
2377
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
L
Linus Torvalds 已提交
2378 2379 2380
{
	ENCODE_SEQID_OP_HEAD;

2381 2382 2383
	if (!nfserr)
		nfsd4_encode_stateid(resp, &close->cl_stateid);

L
Linus Torvalds 已提交
2384
	ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2385
	return nfserr;
L
Linus Torvalds 已提交
2386 2387 2388
}


2389
static __be32
2390
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
L
Linus Torvalds 已提交
2391
{
2392
	__be32 *p;
L
Linus Torvalds 已提交
2393 2394 2395 2396 2397 2398

	if (!nfserr) {
		RESERVE_SPACE(8);
		WRITEMEM(commit->co_verf.data, 8);
		ADJUST_ARGS();
	}
2399
	return nfserr;
L
Linus Torvalds 已提交
2400 2401
}

2402
static __be32
2403
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
L
Linus Torvalds 已提交
2404
{
2405
	__be32 *p;
L
Linus Torvalds 已提交
2406 2407 2408

	if (!nfserr) {
		RESERVE_SPACE(32);
J
J. Bruce Fields 已提交
2409
		write_cinfo(&p, &create->cr_cinfo);
L
Linus Torvalds 已提交
2410 2411 2412 2413 2414
		WRITE32(2);
		WRITE32(create->cr_bmval[0]);
		WRITE32(create->cr_bmval[1]);
		ADJUST_ARGS();
	}
2415
	return nfserr;
L
Linus Torvalds 已提交
2416 2417
}

2418 2419
static __be32
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
L
Linus Torvalds 已提交
2420 2421 2422 2423 2424 2425 2426 2427 2428 2429
{
	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,
2430
				    resp->rqstp, 0);
L
Linus Torvalds 已提交
2431 2432 2433 2434 2435
	if (!nfserr)
		resp->p += buflen;
	return nfserr;
}

2436 2437
static __be32
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
L
Linus Torvalds 已提交
2438
{
2439
	struct svc_fh *fhp = *fhpp;
L
Linus Torvalds 已提交
2440
	unsigned int len;
2441
	__be32 *p;
L
Linus Torvalds 已提交
2442 2443 2444 2445 2446 2447 2448 2449

	if (!nfserr) {
		len = fhp->fh_handle.fh_size;
		RESERVE_SPACE(len + 4);
		WRITE32(len);
		WRITEMEM(&fhp->fh_handle.fh_base, len);
		ADJUST_ARGS();
	}
2450
	return nfserr;
L
Linus Torvalds 已提交
2451 2452 2453 2454 2455 2456 2457 2458 2459
}

/*
* 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)
{
2460
	__be32 *p;
L
Linus Torvalds 已提交
2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477

	RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
	WRITE64(ld->ld_start);
	WRITE64(ld->ld_length);
	WRITE32(ld->ld_type);
	if (ld->ld_sop) {
		WRITEMEM(&ld->ld_clientid, 8);
		WRITE32(ld->ld_sop->so_owner.len);
		WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
		kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
	}  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
		WRITE64((u64)0); /* clientid */
		WRITE32(0); /* length of owner name */
	}
	ADJUST_ARGS();
}

2478
static __be32
2479
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
L
Linus Torvalds 已提交
2480 2481 2482
{
	ENCODE_SEQID_OP_HEAD;

2483 2484 2485
	if (!nfserr)
		nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
	else if (nfserr == nfserr_denied)
L
Linus Torvalds 已提交
2486 2487
		nfsd4_encode_lock_denied(resp, &lock->lk_denied);

2488
	ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2489
	return nfserr;
L
Linus Torvalds 已提交
2490 2491
}

2492
static __be32
2493
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
L
Linus Torvalds 已提交
2494 2495 2496
{
	if (nfserr == nfserr_denied)
		nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2497
	return nfserr;
L
Linus Torvalds 已提交
2498 2499
}

2500
static __be32
2501
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
L
Linus Torvalds 已提交
2502 2503 2504
{
	ENCODE_SEQID_OP_HEAD;

2505 2506 2507
	if (!nfserr)
		nfsd4_encode_stateid(resp, &locku->lu_stateid);

L
Linus Torvalds 已提交
2508
	ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2509
	return nfserr;
L
Linus Torvalds 已提交
2510 2511 2512
}


2513
static __be32
2514
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
L
Linus Torvalds 已提交
2515
{
2516
	__be32 *p;
L
Linus Torvalds 已提交
2517 2518 2519

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
2520
		write_cinfo(&p, &link->li_cinfo);
L
Linus Torvalds 已提交
2521 2522
		ADJUST_ARGS();
	}
2523
	return nfserr;
L
Linus Torvalds 已提交
2524 2525 2526
}


2527
static __be32
2528
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
L
Linus Torvalds 已提交
2529
{
2530
	__be32 *p;
L
Linus Torvalds 已提交
2531 2532 2533 2534 2535
	ENCODE_SEQID_OP_HEAD;

	if (nfserr)
		goto out;

2536 2537
	nfsd4_encode_stateid(resp, &open->op_stateid);
	RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
2538
	write_cinfo(&p, &open->op_cinfo);
L
Linus Torvalds 已提交
2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549
	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:
2550 2551
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(20);
2552
		WRITE32(open->op_recall);
L
Linus Torvalds 已提交
2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563

		/*
		 * 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:
2564 2565
		nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
		RESERVE_SPACE(32);
L
Linus Torvalds 已提交
2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589
		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;
	default:
		BUG();
	}
	/* XXX save filehandle here */
out:
	ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2590
	return nfserr;
L
Linus Torvalds 已提交
2591 2592
}

2593
static __be32
2594
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
L
Linus Torvalds 已提交
2595 2596
{
	ENCODE_SEQID_OP_HEAD;
2597 2598 2599

	if (!nfserr)
		nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
L
Linus Torvalds 已提交
2600 2601

	ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2602
	return nfserr;
L
Linus Torvalds 已提交
2603 2604
}

2605
static __be32
2606
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
L
Linus Torvalds 已提交
2607 2608
{
	ENCODE_SEQID_OP_HEAD;
2609 2610 2611

	if (!nfserr)
		nfsd4_encode_stateid(resp, &od->od_stateid);
L
Linus Torvalds 已提交
2612 2613

	ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2614
	return nfserr;
L
Linus Torvalds 已提交
2615 2616
}

2617 2618
static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2619
		  struct nfsd4_read *read)
L
Linus Torvalds 已提交
2620 2621 2622 2623 2624
{
	u32 eof;
	int v, pn;
	unsigned long maxcount; 
	long len;
2625
	__be32 *p;
L
Linus Torvalds 已提交
2626 2627 2628 2629 2630 2631 2632 2633

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

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

2634
	maxcount = svc_max_payload(resp->rqstp);
L
Linus Torvalds 已提交
2635 2636 2637 2638 2639 2640
	if (maxcount > read->rd_length)
		maxcount = read->rd_length;

	len = maxcount;
	v = 0;
	while (len > 0) {
2641
		pn = resp->rqstp->rq_resused++;
2642
		resp->rqstp->rq_vec[v].iov_base =
2643
			page_address(resp->rqstp->rq_respages[pn]);
2644
		resp->rqstp->rq_vec[v].iov_len =
2645
			len < PAGE_SIZE ? len : PAGE_SIZE;
L
Linus Torvalds 已提交
2646 2647 2648 2649 2650
		v++;
		len -= PAGE_SIZE;
	}
	read->rd_vlen = v;

2651
	nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2652
			read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
L
Linus Torvalds 已提交
2653 2654 2655 2656 2657 2658
			&maxcount);

	if (nfserr == nfserr_symlink)
		nfserr = nfserr_inval;
	if (nfserr)
		return nfserr;
2659 2660
	eof = (read->rd_offset + maxcount >=
	       read->rd_fhp->fh_dentry->d_inode->i_size);
L
Linus Torvalds 已提交
2661 2662 2663 2664

	WRITE32(eof);
	WRITE32(maxcount);
	ADJUST_ARGS();
2665 2666
	resp->xbuf->head[0].iov_len = (char*)p
					- (char*)resp->xbuf->head[0].iov_base;
L
Linus Torvalds 已提交
2667 2668
	resp->xbuf->page_len = maxcount;

2669 2670
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
2671 2672
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
2673 2674
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
2675 2676
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2677
		ADJUST_ARGS();
L
Linus Torvalds 已提交
2678 2679 2680 2681
	}
	return 0;
}

2682 2683
static __be32
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
L
Linus Torvalds 已提交
2684 2685 2686
{
	int maxcount;
	char *page;
2687
	__be32 *p;
L
Linus Torvalds 已提交
2688 2689 2690 2691 2692 2693

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

2694
	page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
L
Linus Torvalds 已提交
2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712

	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();
2713 2714 2715
	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
2716

2717 2718
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = p;
L
Linus Torvalds 已提交
2719 2720
	resp->xbuf->tail[0].iov_len = 0;
	if (maxcount&3) {
2721 2722
		RESERVE_SPACE(4);
		WRITE32(0);
L
Linus Torvalds 已提交
2723 2724
		resp->xbuf->tail[0].iov_base += maxcount&3;
		resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2725
		ADJUST_ARGS();
L
Linus Torvalds 已提交
2726 2727 2728 2729
	}
	return 0;
}

2730 2731
static __be32
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
L
Linus Torvalds 已提交
2732 2733 2734
{
	int maxcount;
	loff_t offset;
A
Al Viro 已提交
2735
	__be32 *page, *savep, *tailbase;
2736
	__be32 *p;
L
Linus Torvalds 已提交
2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750

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

	RESERVE_SPACE(8);  /* verifier */
	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;
2751
	tailbase = p;
L
Linus Torvalds 已提交
2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767

	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;
	}

2768
	page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
L
Linus Torvalds 已提交
2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792
	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 == nfserr_symlink)
		nfserr = nfserr_notdir;
	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);
2793 2794
	resp->xbuf->page_len = ((char*)p) - (char*)page_address(
		resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
L
Linus Torvalds 已提交
2795

2796 2797
	/* Use rest of head for padding and remaining ops: */
	resp->xbuf->tail[0].iov_base = tailbase;
L
Linus Torvalds 已提交
2798 2799
	resp->xbuf->tail[0].iov_len = 0;
	resp->p = resp->xbuf->tail[0].iov_base;
2800
	resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
L
Linus Torvalds 已提交
2801 2802 2803 2804 2805 2806 2807 2808

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

2809
static __be32
2810
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
L
Linus Torvalds 已提交
2811
{
2812
	__be32 *p;
L
Linus Torvalds 已提交
2813 2814 2815

	if (!nfserr) {
		RESERVE_SPACE(20);
J
J. Bruce Fields 已提交
2816
		write_cinfo(&p, &remove->rm_cinfo);
L
Linus Torvalds 已提交
2817 2818
		ADJUST_ARGS();
	}
2819
	return nfserr;
L
Linus Torvalds 已提交
2820 2821
}

2822
static __be32
2823
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
L
Linus Torvalds 已提交
2824
{
2825
	__be32 *p;
L
Linus Torvalds 已提交
2826 2827 2828

	if (!nfserr) {
		RESERVE_SPACE(40);
J
J. Bruce Fields 已提交
2829 2830
		write_cinfo(&p, &rename->rn_sinfo);
		write_cinfo(&p, &rename->rn_tinfo);
L
Linus Torvalds 已提交
2831 2832
		ADJUST_ARGS();
	}
2833
	return nfserr;
L
Linus Torvalds 已提交
2834 2835
}

2836
static __be32
2837
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
A
Andy Adamson 已提交
2838 2839 2840 2841
		     struct nfsd4_secinfo *secinfo)
{
	int i = 0;
	struct svc_export *exp = secinfo->si_exp;
2842 2843 2844
	u32 nflavs;
	struct exp_flavor_info *flavs;
	struct exp_flavor_info def_flavs[2];
2845
	__be32 *p;
A
Andy Adamson 已提交
2846 2847 2848

	if (nfserr)
		goto out;
2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868
	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
2869
	RESERVE_SPACE(4);
2870
	WRITE32(nflavs);
A
Andy Adamson 已提交
2871
	ADJUST_ARGS();
2872 2873
	for (i = 0; i < nflavs; i++) {
		u32 flav = flavs[i].pseudoflavor;
A
Andy Adamson 已提交
2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899
		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);
2900
	return nfserr;
A
Andy Adamson 已提交
2901 2902
}

L
Linus Torvalds 已提交
2903 2904 2905 2906
/*
 * The SETATTR encode routine is special -- it always encodes a bitmap,
 * regardless of the error status.
 */
2907
static __be32
2908
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
L
Linus Torvalds 已提交
2909
{
2910
	__be32 *p;
L
Linus Torvalds 已提交
2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923

	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();
2924
	return nfserr;
L
Linus Torvalds 已提交
2925 2926
}

2927
static __be32
2928
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
L
Linus Torvalds 已提交
2929
{
2930
	__be32 *p;
L
Linus Torvalds 已提交
2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943

	if (!nfserr) {
		RESERVE_SPACE(8 + sizeof(nfs4_verifier));
		WRITEMEM(&scd->se_clientid, 8);
		WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
		ADJUST_ARGS();
	}
	else if (nfserr == nfserr_clid_inuse) {
		RESERVE_SPACE(8);
		WRITE32(0);
		WRITE32(0);
		ADJUST_ARGS();
	}
2944
	return nfserr;
L
Linus Torvalds 已提交
2945 2946
}

2947
static __be32
2948
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
L
Linus Torvalds 已提交
2949
{
2950
	__be32 *p;
L
Linus Torvalds 已提交
2951 2952 2953 2954 2955 2956 2957 2958

	if (!nfserr) {
		RESERVE_SPACE(16);
		WRITE32(write->wr_bytes_written);
		WRITE32(write->wr_how_written);
		WRITEMEM(write->wr_verifier.data, 8);
		ADJUST_ARGS();
	}
2959
	return nfserr;
L
Linus Torvalds 已提交
2960 2961
}

A
Andy Adamson 已提交
2962 2963 2964 2965
static __be32
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
			 struct nfsd4_exchange_id *exid)
{
2966
	__be32 *p;
A
Andy Adamson 已提交
2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014
	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
3015 3016 3017 3018 3019 3020
}

static __be32
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
			    struct nfsd4_create_session *sess)
{
3021
	__be32 *p;
A
Andy Adamson 已提交
3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063

	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
3064 3065 3066 3067 3068 3069 3070 3071 3072
}

static __be32
nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
			     struct nfsd4_destroy_session *destroy_session)
{
	return nfserr;
}

3073
__be32
A
Andy Adamson 已提交
3074 3075 3076
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
		      struct nfsd4_sequence *seq)
{
3077
	__be32 *p;
B
Benny Halevy 已提交
3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095

	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);
	WRITE32(seq->maxslots);
	/*
	 * FIXME: for now:
	 *   target_maxslots = maxslots
	 *   status_flags = 0
	 */
	WRITE32(seq->maxslots);
	WRITE32(0);

	ADJUST_ARGS();
3096
	resp->cstate.datap = p; /* DRC cache data pointer */
B
Benny Halevy 已提交
3097
	return 0;
A
Andy Adamson 已提交
3098 3099
}

3100 3101 3102 3103 3104 3105 3106 3107
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
3108 3109 3110 3111 3112
/*
 * 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.
 */
3113
static nfsd4_enc nfsd4_enc_ops[] = {
3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129
	[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,
3130
	[OP_OPENATTR]		= (nfsd4_enc)nfsd4_encode_noop,
3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150
	[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
3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171

	/* NFSv4.1 operations */
	[OP_BACKCHANNEL_CTL]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
	[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,
	[OP_FREE_STATEID]	= (nfsd4_enc)nfsd4_encode_noop,
	[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,
	[OP_SECINFO_NO_NAME]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_SEQUENCE]		= (nfsd4_enc)nfsd4_encode_sequence,
	[OP_SET_SSV]		= (nfsd4_enc)nfsd4_encode_noop,
	[OP_TEST_STATEID]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_WANT_DELEGATION]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_DESTROY_CLIENTID]	= (nfsd4_enc)nfsd4_encode_noop,
	[OP_RECLAIM_COMPLETE]	= (nfsd4_enc)nfsd4_encode_noop,
3172 3173
};

3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198
/*
 * Calculate the total amount of memory that the compound response has taken
 * after encoding the current operation.
 *
 * pad: add on 8 bytes for the next operation's op_code and status so that
 * there is room to cache a failure on the next operation.
 *
 * Compare this length to the session se_fmaxresp_cached.
 *
 * 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.
 */
static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
{
	int status = 0;
	struct xdr_buf *xb = &resp->rqstp->rq_res;
	struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
	struct nfsd4_session *session = NULL;
	struct nfsd4_slot *slot = resp->cstate.slot;
	u32 length, tlen = 0, pad = 8;

	if (!nfsd4_has_session(&resp->cstate))
		return status;

	session = resp->cstate.session;
3199
	if (session == NULL || slot->sl_cachethis == 0)
3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215
		return status;

	if (resp->opcnt >= args->opcnt)
		pad = 0; /* this is the last operation */

	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);

3216
	if (length <= session->se_fchannel.maxresp_cached)
3217 3218 3219 3220 3221
		return status;
	else
		return nfserr_rep_too_big_to_cache;
}

L
Linus Torvalds 已提交
3222 3223 3224
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
A
Al Viro 已提交
3225
	__be32 *statp;
3226
	__be32 *p;
L
Linus Torvalds 已提交
3227 3228 3229 3230 3231 3232

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

3233 3234 3235 3236 3237
	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);
3238 3239 3240
	/* nfsd4_check_drc_limit guarantees enough room for error status */
	if (!op->status && nfsd4_check_drc_limit(resp))
		op->status = nfserr_rep_too_big_to_cache;
3241
status:
L
Linus Torvalds 已提交
3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259
	/*
	 * 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)
{
3260
	__be32 *p;
L
Linus Torvalds 已提交
3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275
	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
3276
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
L
Linus Torvalds 已提交
3277 3278 3279 3280 3281 3282 3283 3284 3285 3286
{
        return xdr_ressize_check(rqstp, p);
}

void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
{
	if (args->ops != args->iops) {
		kfree(args->ops);
		args->ops = args->iops;
	}
J
Jesper Juhl 已提交
3287 3288
	kfree(args->tmpp);
	args->tmpp = NULL;
L
Linus Torvalds 已提交
3289 3290 3291 3292 3293 3294 3295 3296 3297
	while (args->to_free) {
		struct tmpbuf *tb = args->to_free;
		args->to_free = tb->next;
		tb->release(tb->buf);
		kfree(tb);
	}
}

int
A
Al Viro 已提交
3298
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
L
Linus Torvalds 已提交
3299
{
3300
	__be32 status;
L
Linus Torvalds 已提交
3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318

	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;

	status = nfsd4_decode_compound(args);
	if (status) {
		nfsd4_release_compoundargs(args);
	}
	return !status;
}

int
A
Al Viro 已提交
3319
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
L
Linus Torvalds 已提交
3320 3321 3322 3323
{
	/*
	 * All that remains is to write the tag and operation count...
	 */
3324
	struct nfsd4_compound_state *cs = &resp->cstate;
L
Linus Torvalds 已提交
3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337
	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);
3338 3339 3340 3341
	if (nfsd4_has_session(cs)) {
		if (cs->status != nfserr_replay_cache) {
			nfsd4_store_cache_entry(resp);
			dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3342
			cs->slot->sl_inuse = false;
3343
		}
3344 3345
		/* Renew the clientid on success and on replay */
		release_session_client(cs->session);
3346
		nfsd4_put_session(cs->session);
A
Andy Adamson 已提交
3347
	}
L
Linus Torvalds 已提交
3348 3349 3350 3351 3352 3353 3354 3355
	return 1;
}

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