[linux.git] / fs / nfsd / nfs3proc.c

/*
 * linux/fs/nfsd/nfs3proc.c
 *
 * Process version 3 NFS requests.
 *
 * Copyright (C) 1996, 1997, 1998 Olaf Kirch <[email protected]>
 */

#include <linux/linkage.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/major.h>

#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr3.h>
#include <linux/nfs3.h>

#define NFSDDBG_FACILITY		NFSDDBG_PROC

#define RETURN_STATUS(st)	{ resp->status = (st); return (st); }

static int	nfs3_ftypes[] = {
	0,			/* NF3NON */
	S_IFREG,		/* NF3REG */
	S_IFDIR,		/* NF3DIR */
	S_IFBLK,		/* NF3BLK */
	S_IFCHR,		/* NF3CHR */
	S_IFLNK,		/* NF3LNK */
	S_IFSOCK,		/* NF3SOCK */
	S_IFIFO,		/* NF3FIFO */
};

/*
 * NULL call.
 */
static int
nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
{
	return nfs_ok;
}

/*
 * Get a file's attributes
 */
static int
nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
					   struct nfsd3_attrstat *resp)
{
	int	err, nfserr;

	dprintk("nfsd: GETATTR(3)  %s\n",
		SVCFH_fmt(&argp->fh));

	fh_copy(&resp->fh, &argp->fh);
	nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
	if (nfserr)
		RETURN_STATUS(nfserr);

	err = vfs_getattr(resp->fh.fh_export->ex_mnt,
			  resp->fh.fh_dentry, &resp->stat);
	nfserr = nfserrno(err);

	RETURN_STATUS(nfserr);
}

/*
 * Set a file's attributes
 */
static int
nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
					   struct nfsd3_attrstat  *resp)
{
	int	nfserr;

	dprintk("nfsd: SETATTR(3)  %s\n",
				SVCFH_fmt(&argp->fh));

	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
			      argp->check_guard, argp->guardtime);
	RETURN_STATUS(nfserr);
}

/*
 * Look up a path name component
 */
static int
nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					  struct nfsd3_diropres  *resp)
{
	int	nfserr;

	dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	fh_copy(&resp->dirfh, &argp->fh);
	fh_init(&resp->fh, NFS3_FHSIZE);

	nfserr = nfsd_lookup(rqstp, &resp->dirfh,
				    argp->name,
				    argp->len,
				    &resp->fh);
	RETURN_STATUS(nfserr);
}

/*
 * Check file access
 */
static int
nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
					  struct nfsd3_accessres *resp)
{
	int	nfserr;

	dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
				SVCFH_fmt(&argp->fh),
				argp->access);

	fh_copy(&resp->fh, &argp->fh);
	resp->access = argp->access;
	nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
	RETURN_STATUS(nfserr);
}

/*
 * Read a symlink.
 */
static int
nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
					   struct nfsd3_readlinkres *resp)
{
	int nfserr;

	dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));

	/* Read the symlink. */
	fh_copy(&resp->fh, &argp->fh);
	resp->len = NFS3_MAXPATHLEN;
	nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
	RETURN_STATUS(nfserr);
}

/*
 * Read a portion of a file.
 */
static int
nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
				        struct nfsd3_readres  *resp)
{
	int	nfserr;

	dprintk("nfsd: READ(3) %s %lu bytes at %lu\n",
				SVCFH_fmt(&argp->fh),
				(unsigned long) argp->count,
				(unsigned long) argp->offset);

	/* Obtain buffer pointer for payload.
	 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
	 * + 1 (xdr opaque byte count) = 26
	 */

	resp->count = argp->count;
	if (NFSSVC_MAXBLKSIZE < resp->count)
		resp->count = NFSSVC_MAXBLKSIZE;

	svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);

	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_read(rqstp, &resp->fh, NULL,
				  argp->offset,
			   	  argp->vec, argp->vlen,
				  &resp->count);
	if (nfserr == 0) {
		struct inode	*inode = resp->fh.fh_dentry->d_inode;

		resp->eof = (argp->offset + resp->count) >= inode->i_size;
	}

	RETURN_STATUS(nfserr);
}

/*
 * Write data to a file
 */
static int
nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
					 struct nfsd3_writeres  *resp)
{
	int	nfserr;

	dprintk("nfsd: WRITE(3)    %s %d bytes at %ld%s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				(unsigned long) argp->offset,
				argp->stable? " stable" : "");

	fh_copy(&resp->fh, &argp->fh);
	resp->committed = argp->stable;
	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
				   argp->offset,
				   argp->vec, argp->vlen,
				   argp->len,
				   &resp->committed);
	resp->count = argp->count;
	RETURN_STATUS(nfserr);
}

/*
 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
 * At least in theory; we'll see how it fares in practice when the
 * first reports about SunOS compatibility problems start to pour in...
 */
static int
nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
					  struct nfsd3_diropres   *resp)
{
	svc_fh		*dirfhp, *newfhp = NULL;
	struct iattr	*attr;
	u32		nfserr;

	dprintk("nfsd: CREATE(3)   %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
	attr   = &argp->attrs;

	/* Get the directory inode */
	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_CREATE);
	if (nfserr)
		RETURN_STATUS(nfserr);

	/* Unfudge the mode bits */
	attr->ia_mode &= ~S_IFMT;
	if (!(attr->ia_valid & ATTR_MODE)) { 
		attr->ia_valid |= ATTR_MODE;
		attr->ia_mode = S_IFREG;
	} else {
		attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
	}

	/* Now create the file and set attributes */
	nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len,
				attr, newfhp,
				argp->createmode, argp->verf, NULL);

	RETURN_STATUS(nfserr);
}

/*
 * Make directory. This operation is not idempotent.
 */
static int
nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
					 struct nfsd3_diropres   *resp)
{
	int	nfserr;

	dprintk("nfsd: MKDIR(3)    %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	argp->attrs.ia_valid &= ~ATTR_SIZE;
	fh_copy(&resp->dirfh, &argp->fh);
	fh_init(&resp->fh, NFS3_FHSIZE);
	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
				    &argp->attrs, S_IFDIR, 0, &resp->fh);

	RETURN_STATUS(nfserr);
}

static int
nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
					   struct nfsd3_diropres    *resp)
{
	int	nfserr;

	dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
				SVCFH_fmt(&argp->ffh),
				argp->flen, argp->fname,
				argp->tlen, argp->tname);

	fh_copy(&resp->dirfh, &argp->ffh);
	fh_init(&resp->fh, NFS3_FHSIZE);
	nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
						   argp->tname, argp->tlen,
						   &resp->fh, &argp->attrs);
	RETURN_STATUS(nfserr);
}

/*
 * Make socket/fifo/device.
 */
static int
nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
					 struct nfsd3_diropres  *resp)
{
	int	nfserr, type;
	dev_t	rdev = 0;

	dprintk("nfsd: MKNOD(3)    %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	fh_copy(&resp->dirfh, &argp->fh);
	fh_init(&resp->fh, NFS3_FHSIZE);

	if (argp->ftype == 0 || argp->ftype >= NF3BAD)
		RETURN_STATUS(nfserr_inval);
	if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
		rdev = MKDEV(argp->major, argp->minor);
		if (MAJOR(rdev) != argp->major ||
		    MINOR(rdev) != argp->minor)
			RETURN_STATUS(nfserr_inval);
	} else
		if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
			RETURN_STATUS(nfserr_inval);

	type = nfs3_ftypes[argp->ftype];
	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
				    &argp->attrs, type, rdev, &resp->fh);

	RETURN_STATUS(nfserr);
}

/*
 * Remove file/fifo/socket etc.
 */
static int
nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					  struct nfsd3_attrstat  *resp)
{
	int	nfserr;

	dprintk("nfsd: REMOVE(3)   %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	/* Unlink. -S_IFDIR means file must not be a directory */
	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
	RETURN_STATUS(nfserr);
}

/*
 * Remove a directory
 */
static int
nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					 struct nfsd3_attrstat  *resp)
{
	int	nfserr;

	dprintk("nfsd: RMDIR(3)    %s %.*s\n",
				SVCFH_fmt(&argp->fh),
				argp->len,
				argp->name);

	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
	RETURN_STATUS(nfserr);
}

static int
nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
					  struct nfsd3_renameres  *resp)
{
	int	nfserr;

	dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
				SVCFH_fmt(&argp->ffh),
				argp->flen,
				argp->fname);
	dprintk("nfsd: -> %s %.*s\n",
				SVCFH_fmt(&argp->tfh),
				argp->tlen,
				argp->tname);

	fh_copy(&resp->ffh, &argp->ffh);
	fh_copy(&resp->tfh, &argp->tfh);
	nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
				    &resp->tfh, argp->tname, argp->tlen);
	RETURN_STATUS(nfserr);
}

static int
nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
					struct nfsd3_linkres  *resp)
{
	int	nfserr;

	dprintk("nfsd: LINK(3)     %s ->\n",
				SVCFH_fmt(&argp->ffh));
	dprintk("nfsd:   -> %s %.*s\n",
				SVCFH_fmt(&argp->tfh),
				argp->tlen,
				argp->tname);

	fh_copy(&resp->fh,  &argp->ffh);
	fh_copy(&resp->tfh, &argp->tfh);
	nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
				  &resp->fh);
	RETURN_STATUS(nfserr);
}

/*
 * Read a portion of a directory.
 */
static int
nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
					   struct nfsd3_readdirres  *resp)
{
	int		nfserr, count;

	dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
				SVCFH_fmt(&argp->fh),
				argp->count, (u32) argp->cookie);

	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
	 * client read size */
	count = (argp->count >> 2) - 2;

	/* Read directory and encode entries on the fly */
	fh_copy(&resp->fh, &argp->fh);

	resp->buflen = count;
	resp->common.err = nfs_ok;
	resp->buffer = argp->buffer;
	resp->rqstp = rqstp;
	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
					&resp->common, nfs3svc_encode_entry);
	memcpy(resp->verf, argp->verf, 8);
	resp->count = resp->buffer - argp->buffer;
	if (resp->offset)
		xdr_encode_hyper(resp->offset, argp->cookie);

	RETURN_STATUS(nfserr);
}

/*
 * Read a portion of a directory, including file handles and attrs.
 * For now, we choose to ignore the dircount parameter.
 */
static int
nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
					       struct nfsd3_readdirres  *resp)
{
	int	nfserr, count = 0;
	loff_t	offset;
	int	i;
	caddr_t	page_addr = NULL;

	dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
				SVCFH_fmt(&argp->fh),
				argp->count, (u32) argp->cookie);

	/* Convert byte count to number of words (i.e. >> 2),
	 * and reserve room for the NULL ptr & eof flag (-2 words) */
	resp->count = (argp->count >> 2) - 2;

	/* Read directory and encode entries on the fly */
	fh_copy(&resp->fh, &argp->fh);

	resp->common.err = nfs_ok;
	resp->buffer = argp->buffer;
	resp->buflen = resp->count;
	resp->rqstp = rqstp;
	offset = argp->cookie;
	nfserr = nfsd_readdir(rqstp, &resp->fh,
				     &offset,
				     &resp->common,
				     nfs3svc_encode_entry_plus);
	memcpy(resp->verf, argp->verf, 8);
	for (i=1; i<rqstp->rq_resused ; i++) {
		page_addr = page_address(rqstp->rq_respages[i]);

		if (((caddr_t)resp->buffer >= page_addr) &&
		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
			count += (caddr_t)resp->buffer - page_addr;
			break;
		}
		count += PAGE_SIZE;
	}
	resp->count = count >> 2;
	if (resp->offset) {
		if (unlikely(resp->offset1)) {
			/* we ended up with offset on a page boundary */
			*resp->offset = htonl(offset >> 32);
			*resp->offset1 = htonl(offset & 0xffffffff);
			resp->offset1 = NULL;
		} else {
			xdr_encode_hyper(resp->offset, offset);
		}
	}

	RETURN_STATUS(nfserr);
}

/*
 * Get file system stats
 */
static int
nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
					   struct nfsd3_fsstatres *resp)
{
	int	nfserr;

	dprintk("nfsd: FSSTAT(3)   %s\n",
				SVCFH_fmt(&argp->fh));

	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
	fh_put(&argp->fh);
	RETURN_STATUS(nfserr);
}

/*
 * Get file system info
 */
static int
nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
					   struct nfsd3_fsinfores *resp)
{
	int	nfserr;

	dprintk("nfsd: FSINFO(3)   %s\n",
				SVCFH_fmt(&argp->fh));

	resp->f_rtmax  = NFSSVC_MAXBLKSIZE;
	resp->f_rtpref = NFSSVC_MAXBLKSIZE;
	resp->f_rtmult = PAGE_SIZE;
	resp->f_wtmax  = NFSSVC_MAXBLKSIZE;
	resp->f_wtpref = NFSSVC_MAXBLKSIZE;
	resp->f_wtmult = PAGE_SIZE;
	resp->f_dtpref = PAGE_SIZE;
	resp->f_maxfilesize = ~(u32) 0;
	resp->f_properties = NFS3_FSF_DEFAULT;

	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);

	/* Check special features of the file system. May request
	 * different read/write sizes for file systems known to have
	 * problems with large blocks */
	if (nfserr == 0) {
		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;

		/* Note that we don't care for remote fs's here */
		if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
			resp->f_properties = NFS3_FSF_BILLYBOY;
		}
		resp->f_maxfilesize = sb->s_maxbytes;
	}

	fh_put(&argp->fh);
	RETURN_STATUS(nfserr);
}

/*
 * Get pathconf info for the specified file
 */
static int
nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
					     struct nfsd3_pathconfres *resp)
{
	int	nfserr;

	dprintk("nfsd: PATHCONF(3) %s\n",
				SVCFH_fmt(&argp->fh));

	/* Set default pathconf */
	resp->p_link_max = 255;		/* at least */
	resp->p_name_max = 255;		/* at least */
	resp->p_no_trunc = 0;
	resp->p_chown_restricted = 1;
	resp->p_case_insensitive = 0;
	resp->p_case_preserving = 1;

	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);

	if (nfserr == 0) {
		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;

		/* Note that we don't care for remote fs's here */
		switch (sb->s_magic) {
		case EXT2_SUPER_MAGIC:
			resp->p_link_max = EXT2_LINK_MAX;
			resp->p_name_max = EXT2_NAME_LEN;
			break;
		case 0x4d44:	/* MSDOS_SUPER_MAGIC */
			resp->p_case_insensitive = 1;
			resp->p_case_preserving  = 0;
			break;
		}
	}

	fh_put(&argp->fh);
	RETURN_STATUS(nfserr);
}


/*
 * Commit a file (range) to stable storage.
 */
static int
nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
					   struct nfsd3_commitres  *resp)
{
	int	nfserr;

	dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
				SVCFH_fmt(&argp->fh),
				argp->count,
				(unsigned long long) argp->offset);

	if (argp->offset > NFS_OFFSET_MAX)
		RETURN_STATUS(nfserr_inval);

	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);

	RETURN_STATUS(nfserr);
}


/*
 * NFSv3 Server procedures.
 * Only the results of non-idempotent operations are cached.
 */
#define nfs3svc_decode_voidargs		NULL
#define nfs3svc_release_void		NULL
#define nfs3svc_decode_fhandleargs	nfs3svc_decode_fhandle
#define nfs3svc_encode_attrstatres	nfs3svc_encode_attrstat
#define nfs3svc_encode_wccstatres	nfs3svc_encode_wccstat
#define nfsd3_mkdirargs			nfsd3_createargs
#define nfsd3_readdirplusargs		nfsd3_readdirargs
#define nfsd3_fhandleargs		nfsd_fhandle
#define nfsd3_fhandleres		nfsd3_attrstat
#define nfsd3_attrstatres		nfsd3_attrstat
#define nfsd3_wccstatres		nfsd3_attrstat
#define nfsd3_createres			nfsd3_diropres
#define nfsd3_voidres			nfsd3_voidargs
struct nfsd3_voidargs { int dummy; };

#define PROC(name, argt, rest, relt, cache, respsize)	\
 { (svc_procfunc) nfsd3_proc_##name,		\
   (kxdrproc_t) nfs3svc_decode_##argt##args,	\
   (kxdrproc_t) nfs3svc_encode_##rest##res,	\
   (kxdrproc_t) nfs3svc_release_##relt,		\
   sizeof(struct nfsd3_##argt##args),		\
   sizeof(struct nfsd3_##rest##res),		\
   0,						\
   cache,					\
   respsize,					\
 }

#define ST 1		/* status*/
#define FH 17		/* filehandle with length */
#define AT 21		/* attributes */
#define pAT (1+AT)	/* post attributes - conditional */
#define WC (7+pAT)	/* WCC attributes */

static struct svc_procedure		nfsd_procedures3[22] = {
  PROC(null,	 void,		void,		void,	  RC_NOCACHE, ST),
  PROC(getattr,	 fhandle,	attrstat,	fhandle,  RC_NOCACHE, ST+AT),
  PROC(setattr,  sattr,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
  PROC(lookup,	 dirop,		dirop,		fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
  PROC(access,	 access,	access,		fhandle,  RC_NOCACHE, ST+pAT+1),
  PROC(readlink, readlink,	readlink,	fhandle,  RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
  PROC(read,	 read,		read,		fhandle,  RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
  PROC(write,	 write,		write,		fhandle,  RC_REPLBUFF, ST+WC+4),
  PROC(create,	 create,	create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
  PROC(mkdir,	 mkdir,		create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
  PROC(symlink,	 symlink,	create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
  PROC(mknod,	 mknod,		create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
  PROC(remove,	 dirop,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
  PROC(rmdir,	 dirop,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
  PROC(rename,	 rename,	rename,		fhandle2, RC_REPLBUFF, ST+WC+WC),
  PROC(link,	 link,		link,		fhandle2, RC_REPLBUFF, ST+pAT+WC),
  PROC(readdir,	 readdir,	readdir,	fhandle,  RC_NOCACHE, 0),
  PROC(readdirplus,readdirplus,	readdir,	fhandle,  RC_NOCACHE, 0),
  PROC(fsstat,	 fhandle,	fsstat,		void,     RC_NOCACHE, ST+pAT+2*6+1),
  PROC(fsinfo,   fhandle,	fsinfo,		void,     RC_NOCACHE, ST+pAT+12),
  PROC(pathconf, fhandle,	pathconf,	void,     RC_NOCACHE, ST+pAT+6),
  PROC(commit,	 commit,	commit,		fhandle,  RC_NOCACHE, ST+WC+2),
};

struct svc_version	nfsd_version3 = {
		.vs_vers	= 3,
		.vs_nproc	= 22,
		.vs_proc	= nfsd_procedures3,
		.vs_dispatch	= nfsd_dispatch,
		.vs_xdrsize	= NFS3_SVC_XDRSIZE,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/nfsd/nfs3proc.c
	3	*
	4	* Process version 3 NFS requests.
	5	*
	6	* Copyright (C) 1996, 1997, 1998 Olaf Kirch <[email protected]>
	7	*/
	8
	9	#include <linux/linkage.h>
	10	#include <linux/time.h>
	11	#include <linux/errno.h>
	12	#include <linux/fs.h>
	13	#include <linux/ext2_fs.h>
	14	#include <linux/stat.h>
	15	#include <linux/fcntl.h>
	16	#include <linux/net.h>
	17	#include <linux/in.h>
	18	#include <linux/unistd.h>
	19	#include <linux/slab.h>
	20	#include <linux/major.h>
	21
	22	#include <linux/sunrpc/svc.h>
	23	#include <linux/nfsd/nfsd.h>
	24	#include <linux/nfsd/cache.h>
	25	#include <linux/nfsd/xdr3.h>
	26	#include <linux/nfs3.h>
	27
	28	#define NFSDDBG_FACILITY NFSDDBG_PROC
	29
	30	#define RETURN_STATUS(st) { resp->status = (st); return (st); }
	31
	32	static int nfs3_ftypes[] = {
	33	0, /* NF3NON */
	34	S_IFREG, /* NF3REG */
	35	S_IFDIR, /* NF3DIR */
	36	S_IFBLK, /* NF3BLK */
	37	S_IFCHR, /* NF3CHR */
	38	S_IFLNK, /* NF3LNK */
	39	S_IFSOCK, /* NF3SOCK */
	40	S_IFIFO, /* NF3FIFO */
	41	};
	42
	43	/*
	44	* NULL call.
	45	*/
	46	static int
	47	nfsd3_proc_null(struct svc_rqst rqstp, void argp, void *resp)
	48	{
	49	return nfs_ok;
	50	}
	51
	52	/*
	53	* Get a file's attributes
	54	*/
	55	static int
	56	nfsd3_proc_getattr(struct svc_rqst rqstp, struct nfsd_fhandle argp,
	57	struct nfsd3_attrstat *resp)
	58	{
a334de28	59	int err, nfserr;
1da177e4 LT	60
1da177e4 LT	61	dprintk("nfsd: GETATTR(3) %s\n",
a334de28	62	SVCFH_fmt(&argp->fh));
1da177e4 LT	63
	64	fh_copy(&resp->fh, &argp->fh);
	65	nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
a334de28 DS	66	if (nfserr)
	67	RETURN_STATUS(nfserr);
	68
	69	err = vfs_getattr(resp->fh.fh_export->ex_mnt,
	70	resp->fh.fh_dentry, &resp->stat);
	71	nfserr = nfserrno(err);
	72
1da177e4 LT	73	RETURN_STATUS(nfserr);
	74	}
	75
	76	/*
	77	* Set a file's attributes
	78	*/
	79	static int
	80	nfsd3_proc_setattr(struct svc_rqst rqstp, struct nfsd3_sattrargs argp,
	81	struct nfsd3_attrstat *resp)
	82	{
	83	int nfserr;
	84
	85	dprintk("nfsd: SETATTR(3) %s\n",
	86	SVCFH_fmt(&argp->fh));
	87
	88	fh_copy(&resp->fh, &argp->fh);
	89	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
	90	argp->check_guard, argp->guardtime);
	91	RETURN_STATUS(nfserr);
	92	}
	93
	94	/*
	95	* Look up a path name component
	96	*/
	97	static int
	98	nfsd3_proc_lookup(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
	99	struct nfsd3_diropres *resp)
	100	{
	101	int nfserr;
	102
	103	dprintk("nfsd: LOOKUP(3) %s %.*s\n",
	104	SVCFH_fmt(&argp->fh),
	105	argp->len,
	106	argp->name);
	107
	108	fh_copy(&resp->dirfh, &argp->fh);
	109	fh_init(&resp->fh, NFS3_FHSIZE);
	110
	111	nfserr = nfsd_lookup(rqstp, &resp->dirfh,
	112	argp->name,
	113	argp->len,
	114	&resp->fh);
	115	RETURN_STATUS(nfserr);
	116	}
	117
	118	/*
	119	* Check file access
	120	*/
	121	static int
	122	nfsd3_proc_access(struct svc_rqst rqstp, struct nfsd3_accessargs argp,
	123	struct nfsd3_accessres *resp)
	124	{
	125	int nfserr;
	126
	127	dprintk("nfsd: ACCESS(3) %s 0x%x\n",
	128	SVCFH_fmt(&argp->fh),
	129	argp->access);
	130
	131	fh_copy(&resp->fh, &argp->fh);
	132	resp->access = argp->access;
	133	nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
	134	RETURN_STATUS(nfserr);
	135	}
	136
137	/*
138	* Read a symlink.
139	*/
140	static int
141	nfsd3_proc_readlink(struct svc_rqst rqstp, struct nfsd3_readlinkargs argp,
142	struct nfsd3_readlinkres *resp)
143	{
144	int nfserr;
145
146	dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
147
148	/* Read the symlink. */
149	fh_copy(&resp->fh, &argp->fh);
150	resp->len = NFS3_MAXPATHLEN;
151	nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
152	RETURN_STATUS(nfserr);
153	}
154
155	/*
156	* Read a portion of a file.
157	*/
158	static int
159	nfsd3_proc_read(struct svc_rqst rqstp, struct nfsd3_readargs argp,
160	struct nfsd3_readres *resp)
161	{
162	int nfserr;
163
164	dprintk("nfsd: READ(3) %s %lu bytes at %lu\n",
165	SVCFH_fmt(&argp->fh),
166	(unsigned long) argp->count,
167	(unsigned long) argp->offset);
168
169	/* Obtain buffer pointer for payload.
170	* 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
171	* + 1 (xdr opaque byte count) = 26
172	*/
173
174	resp->count = argp->count;
175	if (NFSSVC_MAXBLKSIZE < resp->count)
176	resp->count = NFSSVC_MAXBLKSIZE;
177
178	svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
179
180	fh_copy(&resp->fh, &argp->fh);
181	nfserr = nfsd_read(rqstp, &resp->fh, NULL,
182	argp->offset,
183	argp->vec, argp->vlen,
184	&resp->count);
185	if (nfserr == 0) {
186	struct inode *inode = resp->fh.fh_dentry->d_inode;
187
188	resp->eof = (argp->offset + resp->count) >= inode->i_size;
189	}
190
191	RETURN_STATUS(nfserr);
192	}
193
194	/*
195	* Write data to a file
196	*/
197	static int
198	nfsd3_proc_write(struct svc_rqst rqstp, struct nfsd3_writeargs argp,
199	struct nfsd3_writeres *resp)
200	{
201	int nfserr;
202
203	dprintk("nfsd: WRITE(3) %s %d bytes at %ld%s\n",
204	SVCFH_fmt(&argp->fh),
205	argp->len,
206	(unsigned long) argp->offset,
207	argp->stable? " stable" : "");
208
209	fh_copy(&resp->fh, &argp->fh);
210	resp->committed = argp->stable;
211	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
212	argp->offset,
213	argp->vec, argp->vlen,
214	argp->len,
215	&resp->committed);
216	resp->count = argp->count;
217	RETURN_STATUS(nfserr);
218	}
219
220	/*
221	* With NFSv3, CREATE processing is a lot easier than with NFSv2.
222	* At least in theory; we'll see how it fares in practice when the
223	* first reports about SunOS compatibility problems start to pour in...
224	*/
225	static int
226	nfsd3_proc_create(struct svc_rqst rqstp, struct nfsd3_createargs argp,
227	struct nfsd3_diropres *resp)
228	{
229	svc_fh dirfhp, newfhp = NULL;
230	struct iattr *attr;
231	u32 nfserr;
232
233	dprintk("nfsd: CREATE(3) %s %.*s\n",
234	SVCFH_fmt(&argp->fh),
235	argp->len,
236	argp->name);
237
238	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
239	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
240	attr = &argp->attrs;
241
242	/* Get the directory inode */
243	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_CREATE);
244	if (nfserr)
245	RETURN_STATUS(nfserr);
246
247	/* Unfudge the mode bits */
248	attr->ia_mode &= ~S_IFMT;
249	if (!(attr->ia_valid & ATTR_MODE)) {
250	attr->ia_valid \|= ATTR_MODE;
251	attr->ia_mode = S_IFREG;
252	} else {
253	attr->ia_mode = (attr->ia_mode & ~S_IFMT) \| S_IFREG;
254	}
255
256	/* Now create the file and set attributes */
257	nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len,
258	attr, newfhp,
259	argp->createmode, argp->verf, NULL);
260
261	RETURN_STATUS(nfserr);
262	}
263
264	/*
265	* Make directory. This operation is not idempotent.
266	*/
267	static int
268	nfsd3_proc_mkdir(struct svc_rqst rqstp, struct nfsd3_createargs argp,
269	struct nfsd3_diropres *resp)
270	{
271	int nfserr;
272
273	dprintk("nfsd: MKDIR(3) %s %.*s\n",
274	SVCFH_fmt(&argp->fh),
275	argp->len,
276	argp->name);
277
278	argp->attrs.ia_valid &= ~ATTR_SIZE;
279	fh_copy(&resp->dirfh, &argp->fh);
280	fh_init(&resp->fh, NFS3_FHSIZE);
281	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
282	&argp->attrs, S_IFDIR, 0, &resp->fh);
283
284	RETURN_STATUS(nfserr);
285	}
286
287	static int
288	nfsd3_proc_symlink(struct svc_rqst rqstp, struct nfsd3_symlinkargs argp,
289	struct nfsd3_diropres *resp)
290	{
291	int nfserr;
292
293	dprintk("nfsd: SYMLINK(3) %s %.s -> %.s\n",
294	SVCFH_fmt(&argp->ffh),
295	argp->flen, argp->fname,
296	argp->tlen, argp->tname);
297
298	fh_copy(&resp->dirfh, &argp->ffh);
299	fh_init(&resp->fh, NFS3_FHSIZE);
300	nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
301	argp->tname, argp->tlen,
302	&resp->fh, &argp->attrs);
303	RETURN_STATUS(nfserr);
304	}
305
306	/*
307	* Make socket/fifo/device.
308	*/
309	static int
310	nfsd3_proc_mknod(struct svc_rqst rqstp, struct nfsd3_mknodargs argp,
311	struct nfsd3_diropres *resp)
312	{
313	int nfserr, type;
314	dev_t rdev = 0;
315
316	dprintk("nfsd: MKNOD(3) %s %.*s\n",
317	SVCFH_fmt(&argp->fh),
318	argp->len,
319	argp->name);
320
321	fh_copy(&resp->dirfh, &argp->fh);
322	fh_init(&resp->fh, NFS3_FHSIZE);
323
324	if (argp->ftype == 0 \|\| argp->ftype >= NF3BAD)
325	RETURN_STATUS(nfserr_inval);
326	if (argp->ftype == NF3CHR \|\| argp->ftype == NF3BLK) {
327	rdev = MKDEV(argp->major, argp->minor);
328	if (MAJOR(rdev) != argp->major \|\|
329	MINOR(rdev) != argp->minor)
330	RETURN_STATUS(nfserr_inval);
331	} else
332	if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
333	RETURN_STATUS(nfserr_inval);
334
335	type = nfs3_ftypes[argp->ftype];
336	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
337	&argp->attrs, type, rdev, &resp->fh);
338
339	RETURN_STATUS(nfserr);
340	}
341
342	/*
343	* Remove file/fifo/socket etc.
344	*/
345	static int
346	nfsd3_proc_remove(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
347	struct nfsd3_attrstat *resp)
348	{
349	int nfserr;
350
351	dprintk("nfsd: REMOVE(3) %s %.*s\n",
352	SVCFH_fmt(&argp->fh),
353	argp->len,
354	argp->name);
355
356	/* Unlink. -S_IFDIR means file must not be a directory */
357	fh_copy(&resp->fh, &argp->fh);
358	nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
359	RETURN_STATUS(nfserr);
360	}
361
362	/*
363	* Remove a directory
364	*/
365	static int
366	nfsd3_proc_rmdir(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
367	struct nfsd3_attrstat *resp)
368	{
369	int nfserr;
370
371	dprintk("nfsd: RMDIR(3) %s %.*s\n",
372	SVCFH_fmt(&argp->fh),
373	argp->len,
374	argp->name);
375
376	fh_copy(&resp->fh, &argp->fh);
377	nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
378	RETURN_STATUS(nfserr);
379	}
380
381	static int
382	nfsd3_proc_rename(struct svc_rqst rqstp, struct nfsd3_renameargs argp,
383	struct nfsd3_renameres *resp)
384	{
385	int nfserr;
386
387	dprintk("nfsd: RENAME(3) %s %.*s ->\n",
388	SVCFH_fmt(&argp->ffh),
389	argp->flen,
390	argp->fname);
391	dprintk("nfsd: -> %s %.*s\n",
392	SVCFH_fmt(&argp->tfh),
393	argp->tlen,
394	argp->tname);
395
396	fh_copy(&resp->ffh, &argp->ffh);
397	fh_copy(&resp->tfh, &argp->tfh);
398	nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
399	&resp->tfh, argp->tname, argp->tlen);
400	RETURN_STATUS(nfserr);
401	}
402
403	static int
404	nfsd3_proc_link(struct svc_rqst rqstp, struct nfsd3_linkargs argp,
405	struct nfsd3_linkres *resp)
406	{
407	int nfserr;
408
409	dprintk("nfsd: LINK(3) %s ->\n",
410	SVCFH_fmt(&argp->ffh));
411	dprintk("nfsd: -> %s %.*s\n",
412	SVCFH_fmt(&argp->tfh),
413	argp->tlen,
414	argp->tname);
415
416	fh_copy(&resp->fh, &argp->ffh);
417	fh_copy(&resp->tfh, &argp->tfh);
418	nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
419	&resp->fh);
420	RETURN_STATUS(nfserr);
421	}
422
423	/*
424	* Read a portion of a directory.
425	*/
426	static int
427	nfsd3_proc_readdir(struct svc_rqst rqstp, struct nfsd3_readdirargs argp,
428	struct nfsd3_readdirres *resp)
429	{
430	int nfserr, count;
431
432	dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
433	SVCFH_fmt(&argp->fh),
434	argp->count, (u32) argp->cookie);
435
436	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
437	* client read size */
438	count = (argp->count >> 2) - 2;
439
440	/* Read directory and encode entries on the fly */
441	fh_copy(&resp->fh, &argp->fh);
442
443	resp->buflen = count;
444	resp->common.err = nfs_ok;
445	resp->buffer = argp->buffer;
446	resp->rqstp = rqstp;
447	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
448	&resp->common, nfs3svc_encode_entry);
449	memcpy(resp->verf, argp->verf, 8);
450	resp->count = resp->buffer - argp->buffer;
451	if (resp->offset)
452	xdr_encode_hyper(resp->offset, argp->cookie);
453
454	RETURN_STATUS(nfserr);
455	}
456
457	/*
458	* Read a portion of a directory, including file handles and attrs.
459	* For now, we choose to ignore the dircount parameter.
460	*/
461	static int
462	nfsd3_proc_readdirplus(struct svc_rqst rqstp, struct nfsd3_readdirargs argp,
463	struct nfsd3_readdirres *resp)
464	{
465	int nfserr, count = 0;
466	loff_t offset;
467	int i;
468	caddr_t page_addr = NULL;
469
470	dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
471	SVCFH_fmt(&argp->fh),
472	argp->count, (u32) argp->cookie);
473
474	/* Convert byte count to number of words (i.e. >> 2),
475	* and reserve room for the NULL ptr & eof flag (-2 words) */
476	resp->count = (argp->count >> 2) - 2;
477
478	/* Read directory and encode entries on the fly */
479	fh_copy(&resp->fh, &argp->fh);
480
481	resp->common.err = nfs_ok;
482	resp->buffer = argp->buffer;
483	resp->buflen = resp->count;
484	resp->rqstp = rqstp;
485	offset = argp->cookie;
486	nfserr = nfsd_readdir(rqstp, &resp->fh,
487	&offset,
488	&resp->common,
489	nfs3svc_encode_entry_plus);
490	memcpy(resp->verf, argp->verf, 8);
491	for (i=1; i<rqstp->rq_resused ; i++) {
492	page_addr = page_address(rqstp->rq_respages[i]);
493
494	if (((caddr_t)resp->buffer >= page_addr) &&
495	((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
496	count += (caddr_t)resp->buffer - page_addr;
497	break;
498	}
499	count += PAGE_SIZE;
500	}
501	resp->count = count >> 2;
502	if (resp->offset) {
503	if (unlikely(resp->offset1)) {
504	/* we ended up with offset on a page boundary */
505	*resp->offset = htonl(offset >> 32);
506	*resp->offset1 = htonl(offset & 0xffffffff);
507	resp->offset1 = NULL;
508	} else {
509	xdr_encode_hyper(resp->offset, offset);
510	}
511	}
512
513	RETURN_STATUS(nfserr);
514	}
515
516	/*
517	* Get file system stats
518	*/
519	static int
520	nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
521	struct nfsd3_fsstatres *resp)
522	{
523	int nfserr;
524
525	dprintk("nfsd: FSSTAT(3) %s\n",
526	SVCFH_fmt(&argp->fh));
527
528	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
529	fh_put(&argp->fh);
530	RETURN_STATUS(nfserr);
531	}
532
533	/*
534	* Get file system info
535	*/
536	static int
537	nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
538	struct nfsd3_fsinfores *resp)
539	{
540	int nfserr;
541
542	dprintk("nfsd: FSINFO(3) %s\n",
543	SVCFH_fmt(&argp->fh));
544
545	resp->f_rtmax = NFSSVC_MAXBLKSIZE;
546	resp->f_rtpref = NFSSVC_MAXBLKSIZE;
547	resp->f_rtmult = PAGE_SIZE;
548	resp->f_wtmax = NFSSVC_MAXBLKSIZE;
549	resp->f_wtpref = NFSSVC_MAXBLKSIZE;
550	resp->f_wtmult = PAGE_SIZE;
551	resp->f_dtpref = PAGE_SIZE;
552	resp->f_maxfilesize = ~(u32) 0;
553	resp->f_properties = NFS3_FSF_DEFAULT;
554
555	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
556
557	/* Check special features of the file system. May request
558	* different read/write sizes for file systems known to have
559	* problems with large blocks */
560	if (nfserr == 0) {
561	struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
562
563	/* Note that we don't care for remote fs's here */
564	if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
565	resp->f_properties = NFS3_FSF_BILLYBOY;
566	}
567	resp->f_maxfilesize = sb->s_maxbytes;
568	}
569
570	fh_put(&argp->fh);
571	RETURN_STATUS(nfserr);
572	}
573
574	/*
575	* Get pathconf info for the specified file
576	*/
577	static int
578	nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
579	struct nfsd3_pathconfres *resp)
580	{
581	int nfserr;
582
583	dprintk("nfsd: PATHCONF(3) %s\n",
584	SVCFH_fmt(&argp->fh));
585
586	/* Set default pathconf */
587	resp->p_link_max = 255; /* at least */
588	resp->p_name_max = 255; /* at least */
589	resp->p_no_trunc = 0;
590	resp->p_chown_restricted = 1;
591	resp->p_case_insensitive = 0;
592	resp->p_case_preserving = 1;
593
594	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
595
596	if (nfserr == 0) {
597	struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
598
599	/* Note that we don't care for remote fs's here */
600	switch (sb->s_magic) {
601	case EXT2_SUPER_MAGIC:
602	resp->p_link_max = EXT2_LINK_MAX;
603	resp->p_name_max = EXT2_NAME_LEN;
604	break;
605	case 0x4d44: /* MSDOS_SUPER_MAGIC */
606	resp->p_case_insensitive = 1;
607	resp->p_case_preserving = 0;
608	break;
609	}
610	}
611
612	fh_put(&argp->fh);
613	RETURN_STATUS(nfserr);
614	}
615
616
617	/*
618	* Commit a file (range) to stable storage.
619	*/
620	static int
621	nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
622	struct nfsd3_commitres *resp)
623	{
624	int nfserr;
625
626	dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
627	SVCFH_fmt(&argp->fh),
628	argp->count,
629	(unsigned long long) argp->offset);
630
631	if (argp->offset > NFS_OFFSET_MAX)
632	RETURN_STATUS(nfserr_inval);
633
634	fh_copy(&resp->fh, &argp->fh);
635	nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
636
637	RETURN_STATUS(nfserr);
638	}
639
640
641	/*
642	* NFSv3 Server procedures.
643	* Only the results of non-idempotent operations are cached.
644	*/
645	#define nfs3svc_decode_voidargs NULL
646	#define nfs3svc_release_void NULL
647	#define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
648	#define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
649	#define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
650	#define nfsd3_mkdirargs nfsd3_createargs
651	#define nfsd3_readdirplusargs nfsd3_readdirargs
652	#define nfsd3_fhandleargs nfsd_fhandle
653	#define nfsd3_fhandleres nfsd3_attrstat
654	#define nfsd3_attrstatres nfsd3_attrstat
655	#define nfsd3_wccstatres nfsd3_attrstat
656	#define nfsd3_createres nfsd3_diropres
657	#define nfsd3_voidres nfsd3_voidargs
658	struct nfsd3_voidargs { int dummy; };
659
660	#define PROC(name, argt, rest, relt, cache, respsize) \
661	{ (svc_procfunc) nfsd3_proc_##name, \
662	(kxdrproc_t) nfs3svc_decode_##argt##args, \
663	(kxdrproc_t) nfs3svc_encode_##rest##res, \
664	(kxdrproc_t) nfs3svc_release_##relt, \
665	sizeof(struct nfsd3_##argt##args), \
666	sizeof(struct nfsd3_##rest##res), \
667	0, \
668	cache, \
669	respsize, \
670	}
671
672	#define ST 1 /* status*/
673	#define FH 17 /* filehandle with length */
674	#define AT 21 /* attributes */
675	#define pAT (1+AT) /* post attributes - conditional */
676	#define WC (7+pAT) /* WCC attributes */
677
678	static struct svc_procedure nfsd_procedures3[22] = {
679	PROC(null, void, void, void, RC_NOCACHE, ST),
680	PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
681	PROC(setattr, sattr, wccstat, fhandle, RC_REPLBUFF, ST+WC),
682	PROC(lookup, dirop, dirop, fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
683	PROC(access, access, access, fhandle, RC_NOCACHE, ST+pAT+1),
684	PROC(readlink, readlink, readlink, fhandle, RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
685	PROC(read, read, read, fhandle, RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
686	PROC(write, write, write, fhandle, RC_REPLBUFF, ST+WC+4),
687	PROC(create, create, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
688	PROC(mkdir, mkdir, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
689	PROC(symlink, symlink, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
690	PROC(mknod, mknod, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
691	PROC(remove, dirop, wccstat, fhandle, RC_REPLBUFF, ST+WC),
692	PROC(rmdir, dirop, wccstat, fhandle, RC_REPLBUFF, ST+WC),
693	PROC(rename, rename, rename, fhandle2, RC_REPLBUFF, ST+WC+WC),
694	PROC(link, link, link, fhandle2, RC_REPLBUFF, ST+pAT+WC),
695	PROC(readdir, readdir, readdir, fhandle, RC_NOCACHE, 0),
696	PROC(readdirplus,readdirplus, readdir, fhandle, RC_NOCACHE, 0),
697	PROC(fsstat, fhandle, fsstat, void, RC_NOCACHE, ST+pAT+2*6+1),
698	PROC(fsinfo, fhandle, fsinfo, void, RC_NOCACHE, ST+pAT+12),
699	PROC(pathconf, fhandle, pathconf, void, RC_NOCACHE, ST+pAT+6),
700	PROC(commit, commit, commit, fhandle, RC_NOCACHE, ST+WC+2),
701	};
702
703	struct svc_version nfsd_version3 = {
704	.vs_vers = 3,
705	.vs_nproc = 22,
706	.vs_proc = nfsd_procedures3,
707	.vs_dispatch = nfsd_dispatch,
708	.vs_xdrsize = NFS3_SVC_XDRSIZE,
709	};