[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 __be32
nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
{
	return nfs_ok;
}

/*
 * Get a file's attributes
 */
static __be32
nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
					   struct nfsd3_attrstat *resp)
{
	int	err;
	__be32	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 __be32
nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
					   struct nfsd3_attrstat  *resp)
{
	__be32	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 __be32
nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					  struct nfsd3_diropres  *resp)
{
	__be32	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 __be32
nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
					  struct nfsd3_accessres *resp)
{
	__be32	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 __be32
nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
					   struct nfsd3_readlinkres *resp)
{
	__be32 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 __be32
nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
				        struct nfsd3_readres  *resp)
{
	__be32	nfserr;
	u32	max_blocksize = svc_max_payload(rqstp);

	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 (max_blocksize < resp->count)
		resp->count = max_blocksize;

	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,
			   	  rqstp->rq_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 __be32
nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
					 struct nfsd3_writeres  *resp)
{
	__be32	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,
				   rqstp->rq_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 __be32
nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
					  struct nfsd3_diropres   *resp)
{
	svc_fh		*dirfhp, *newfhp = NULL;
	struct iattr	*attr;
	__be32		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, NULL);

	RETURN_STATUS(nfserr);
}

/*
 * Make directory. This operation is not idempotent.
 */
static __be32
nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
					 struct nfsd3_diropres   *resp)
{
	__be32	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 __be32
nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
					   struct nfsd3_diropres    *resp)
{
	__be32	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 __be32
nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
					 struct nfsd3_diropres  *resp)
{
	__be32	nfserr;
	int 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 __be32
nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					  struct nfsd3_attrstat  *resp)
{
	__be32	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 __be32
nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
					 struct nfsd3_attrstat  *resp)
{
	__be32	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 __be32
nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
					  struct nfsd3_renameres  *resp)
{
	__be32	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 __be32
nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
					struct nfsd3_linkres  *resp)
{
	__be32	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 __be32
nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
					   struct nfsd3_readdirres  *resp)
{
	__be32		nfserr;
	int		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 __be32
nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
					       struct nfsd3_readdirres  *resp)
{
	__be32	nfserr;
	int	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 __be32
nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
					   struct nfsd3_fsstatres *resp)
{
	__be32	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 __be32
nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
					   struct nfsd3_fsinfores *resp)
{
	__be32	nfserr;
	u32	max_blocksize = svc_max_payload(rqstp);

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

	resp->f_rtmax  = max_blocksize;
	resp->f_rtpref = max_blocksize;
	resp->f_rtmult = PAGE_SIZE;
	resp->f_wtmax  = max_blocksize;
	resp->f_wtpref = max_blocksize;
	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 __be32
nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
					     struct nfsd3_pathconfres *resp)
{
	__be32	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 __be32
nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
					   struct nfsd3_commitres  *resp)
{
	__be32	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/4),
  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	*/
7111c66e	46	static __be32
1da177e4 LT	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	*/
7111c66e	55	static __be32
1da177e4 LT	56	nfsd3_proc_getattr(struct svc_rqst rqstp, struct nfsd_fhandle argp,
	57	struct nfsd3_attrstat *resp)
	58	{
c4d987ba AV	59	int err;
c4d987ba AV	60	__be32 nfserr;
1da177e4 LT	61
1da177e4 LT	62	dprintk("nfsd: GETATTR(3) %s\n",
a334de28	63	SVCFH_fmt(&argp->fh));
1da177e4 LT	64
	65	fh_copy(&resp->fh, &argp->fh);
	66	nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
a334de28 DS	67	if (nfserr)
	68	RETURN_STATUS(nfserr);
	69
	70	err = vfs_getattr(resp->fh.fh_export->ex_mnt,
	71	resp->fh.fh_dentry, &resp->stat);
	72	nfserr = nfserrno(err);
	73
1da177e4 LT	74	RETURN_STATUS(nfserr);
	75	}
	76
	77	/*
	78	* Set a file's attributes
	79	*/
7111c66e	80	static __be32
1da177e4 LT	81	nfsd3_proc_setattr(struct svc_rqst rqstp, struct nfsd3_sattrargs argp,
	82	struct nfsd3_attrstat *resp)
	83	{
c4d987ba	84	__be32 nfserr;
1da177e4 LT	85
	86	dprintk("nfsd: SETATTR(3) %s\n",
	87	SVCFH_fmt(&argp->fh));
	88
	89	fh_copy(&resp->fh, &argp->fh);
	90	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
	91	argp->check_guard, argp->guardtime);
	92	RETURN_STATUS(nfserr);
	93	}
	94
	95	/*
	96	* Look up a path name component
	97	*/
7111c66e	98	static __be32
1da177e4 LT	99	nfsd3_proc_lookup(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
	100	struct nfsd3_diropres *resp)
	101	{
c4d987ba	102	__be32 nfserr;
1da177e4 LT	103
	104	dprintk("nfsd: LOOKUP(3) %s %.*s\n",
	105	SVCFH_fmt(&argp->fh),
	106	argp->len,
	107	argp->name);
	108
	109	fh_copy(&resp->dirfh, &argp->fh);
	110	fh_init(&resp->fh, NFS3_FHSIZE);
	111
	112	nfserr = nfsd_lookup(rqstp, &resp->dirfh,
	113	argp->name,
	114	argp->len,
	115	&resp->fh);
	116	RETURN_STATUS(nfserr);
	117	}
	118
	119	/*
	120	* Check file access
	121	*/
7111c66e	122	static __be32
1da177e4 LT	123	nfsd3_proc_access(struct svc_rqst rqstp, struct nfsd3_accessargs argp,
	124	struct nfsd3_accessres *resp)
	125	{
c4d987ba	126	__be32 nfserr;
1da177e4 LT	127
	128	dprintk("nfsd: ACCESS(3) %s 0x%x\n",
	129	SVCFH_fmt(&argp->fh),
	130	argp->access);
	131
	132	fh_copy(&resp->fh, &argp->fh);
	133	resp->access = argp->access;
	134	nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
	135	RETURN_STATUS(nfserr);
	136	}
	137
	138	/*
	139	* Read a symlink.
	140	*/
7111c66e	141	static __be32
1da177e4 LT	142	nfsd3_proc_readlink(struct svc_rqst rqstp, struct nfsd3_readlinkargs argp,
	143	struct nfsd3_readlinkres *resp)
	144	{
c4d987ba	145	__be32 nfserr;
1da177e4 LT	146
	147	dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
	148
	149	/* Read the symlink. */
	150	fh_copy(&resp->fh, &argp->fh);
	151	resp->len = NFS3_MAXPATHLEN;
	152	nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
	153	RETURN_STATUS(nfserr);
	154	}
	155
	156	/*
	157	* Read a portion of a file.
	158	*/
7111c66e	159	static __be32
1da177e4 LT	160	nfsd3_proc_read(struct svc_rqst rqstp, struct nfsd3_readargs argp,
	161	struct nfsd3_readres *resp)
	162	{
c4d987ba	163	__be32 nfserr;
7adae489	164	u32 max_blocksize = svc_max_payload(rqstp);
1da177e4 LT	165
	166	dprintk("nfsd: READ(3) %s %lu bytes at %lu\n",
	167	SVCFH_fmt(&argp->fh),
	168	(unsigned long) argp->count,
	169	(unsigned long) argp->offset);
	170
	171	/* Obtain buffer pointer for payload.
	172	* 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
	173	* + 1 (xdr opaque byte count) = 26
	174	*/
	175
	176	resp->count = argp->count;
7adae489 GB	177	if (max_blocksize < resp->count)
7adae489 GB	178	resp->count = max_blocksize;
1da177e4 LT	179
	180	svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
	181
	182	fh_copy(&resp->fh, &argp->fh);
	183	nfserr = nfsd_read(rqstp, &resp->fh, NULL,
	184	argp->offset,
3cc03b16	185	rqstp->rq_vec, argp->vlen,
1da177e4 LT	186	&resp->count);
	187	if (nfserr == 0) {
	188	struct inode *inode = resp->fh.fh_dentry->d_inode;
	189
	190	resp->eof = (argp->offset + resp->count) >= inode->i_size;
	191	}
	192
	193	RETURN_STATUS(nfserr);
	194	}
	195
	196	/*
	197	* Write data to a file
	198	*/
7111c66e	199	static __be32
1da177e4 LT	200	nfsd3_proc_write(struct svc_rqst rqstp, struct nfsd3_writeargs argp,
	201	struct nfsd3_writeres *resp)
	202	{
c4d987ba	203	__be32 nfserr;
1da177e4 LT	204
	205	dprintk("nfsd: WRITE(3) %s %d bytes at %ld%s\n",
	206	SVCFH_fmt(&argp->fh),
	207	argp->len,
	208	(unsigned long) argp->offset,
	209	argp->stable? " stable" : "");
	210
	211	fh_copy(&resp->fh, &argp->fh);
	212	resp->committed = argp->stable;
	213	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
	214	argp->offset,
3cc03b16	215	rqstp->rq_vec, argp->vlen,
1da177e4 LT	216	argp->len,
	217	&resp->committed);
	218	resp->count = argp->count;
	219	RETURN_STATUS(nfserr);
	220	}
	221
	222	/*
	223	* With NFSv3, CREATE processing is a lot easier than with NFSv2.
	224	* At least in theory; we'll see how it fares in practice when the
	225	* first reports about SunOS compatibility problems start to pour in...
	226	*/
7111c66e	227	static __be32
1da177e4 LT	228	nfsd3_proc_create(struct svc_rqst rqstp, struct nfsd3_createargs argp,
	229	struct nfsd3_diropres *resp)
	230	{
	231	svc_fh dirfhp, newfhp = NULL;
	232	struct iattr *attr;
c4d987ba	233	__be32 nfserr;
1da177e4 LT	234
	235	dprintk("nfsd: CREATE(3) %s %.*s\n",
	236	SVCFH_fmt(&argp->fh),
	237	argp->len,
	238	argp->name);
	239
	240	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
	241	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
	242	attr = &argp->attrs;
	243
	244	/* Get the directory inode */
	245	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_CREATE);
	246	if (nfserr)
	247	RETURN_STATUS(nfserr);
	248
	249	/* Unfudge the mode bits */
	250	attr->ia_mode &= ~S_IFMT;
	251	if (!(attr->ia_valid & ATTR_MODE)) {
	252	attr->ia_valid \|= ATTR_MODE;
	253	attr->ia_mode = S_IFREG;
	254	} else {
	255	attr->ia_mode = (attr->ia_mode & ~S_IFMT) \| S_IFREG;
	256	}
	257
	258	/* Now create the file and set attributes */
	259	nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len,
	260	attr, newfhp,
81ac95c5	261	argp->createmode, argp->verf, NULL, NULL);
1da177e4 LT	262
	263	RETURN_STATUS(nfserr);
	264	}
	265
	266	/*
	267	* Make directory. This operation is not idempotent.
	268	*/
7111c66e	269	static __be32
1da177e4 LT	270	nfsd3_proc_mkdir(struct svc_rqst rqstp, struct nfsd3_createargs argp,
	271	struct nfsd3_diropres *resp)
	272	{
c4d987ba	273	__be32 nfserr;
1da177e4 LT	274
	275	dprintk("nfsd: MKDIR(3) %s %.*s\n",
	276	SVCFH_fmt(&argp->fh),
	277	argp->len,
	278	argp->name);
	279
	280	argp->attrs.ia_valid &= ~ATTR_SIZE;
	281	fh_copy(&resp->dirfh, &argp->fh);
	282	fh_init(&resp->fh, NFS3_FHSIZE);
	283	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
	284	&argp->attrs, S_IFDIR, 0, &resp->fh);
	285
	286	RETURN_STATUS(nfserr);
	287	}
	288
7111c66e	289	static __be32
1da177e4 LT	290	nfsd3_proc_symlink(struct svc_rqst rqstp, struct nfsd3_symlinkargs argp,
	291	struct nfsd3_diropres *resp)
	292	{
c4d987ba	293	__be32 nfserr;
1da177e4 LT	294
	295	dprintk("nfsd: SYMLINK(3) %s %.s -> %.s\n",
	296	SVCFH_fmt(&argp->ffh),
	297	argp->flen, argp->fname,
	298	argp->tlen, argp->tname);
	299
	300	fh_copy(&resp->dirfh, &argp->ffh);
	301	fh_init(&resp->fh, NFS3_FHSIZE);
	302	nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
	303	argp->tname, argp->tlen,
	304	&resp->fh, &argp->attrs);
	305	RETURN_STATUS(nfserr);
	306	}
	307
	308	/*
	309	* Make socket/fifo/device.
	310	*/
7111c66e	311	static __be32
1da177e4 LT	312	nfsd3_proc_mknod(struct svc_rqst rqstp, struct nfsd3_mknodargs argp,
	313	struct nfsd3_diropres *resp)
	314	{
c4d987ba AV	315	__be32 nfserr;
c4d987ba AV	316	int type;
1da177e4 LT	317	dev_t rdev = 0;
	318
	319	dprintk("nfsd: MKNOD(3) %s %.*s\n",
	320	SVCFH_fmt(&argp->fh),
	321	argp->len,
	322	argp->name);
	323
	324	fh_copy(&resp->dirfh, &argp->fh);
	325	fh_init(&resp->fh, NFS3_FHSIZE);
	326
	327	if (argp->ftype == 0 \|\| argp->ftype >= NF3BAD)
	328	RETURN_STATUS(nfserr_inval);
	329	if (argp->ftype == NF3CHR \|\| argp->ftype == NF3BLK) {
	330	rdev = MKDEV(argp->major, argp->minor);
	331	if (MAJOR(rdev) != argp->major \|\|
	332	MINOR(rdev) != argp->minor)
	333	RETURN_STATUS(nfserr_inval);
	334	} else
	335	if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
	336	RETURN_STATUS(nfserr_inval);
	337
	338	type = nfs3_ftypes[argp->ftype];
	339	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
	340	&argp->attrs, type, rdev, &resp->fh);
	341
	342	RETURN_STATUS(nfserr);
	343	}
	344
	345	/*
	346	* Remove file/fifo/socket etc.
	347	*/
7111c66e	348	static __be32
1da177e4 LT	349	nfsd3_proc_remove(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
	350	struct nfsd3_attrstat *resp)
	351	{
c4d987ba	352	__be32 nfserr;
1da177e4 LT	353
	354	dprintk("nfsd: REMOVE(3) %s %.*s\n",
	355	SVCFH_fmt(&argp->fh),
	356	argp->len,
	357	argp->name);
	358
	359	/* Unlink. -S_IFDIR means file must not be a directory */
	360	fh_copy(&resp->fh, &argp->fh);
	361	nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
	362	RETURN_STATUS(nfserr);
	363	}
	364
	365	/*
	366	* Remove a directory
	367	*/
7111c66e	368	static __be32
1da177e4 LT	369	nfsd3_proc_rmdir(struct svc_rqst rqstp, struct nfsd3_diropargs argp,
	370	struct nfsd3_attrstat *resp)
	371	{
c4d987ba	372	__be32 nfserr;
1da177e4 LT	373
	374	dprintk("nfsd: RMDIR(3) %s %.*s\n",
	375	SVCFH_fmt(&argp->fh),
	376	argp->len,
	377	argp->name);
	378
	379	fh_copy(&resp->fh, &argp->fh);
	380	nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
	381	RETURN_STATUS(nfserr);
	382	}
	383
7111c66e	384	static __be32
1da177e4 LT	385	nfsd3_proc_rename(struct svc_rqst rqstp, struct nfsd3_renameargs argp,
	386	struct nfsd3_renameres *resp)
	387	{
c4d987ba	388	__be32 nfserr;
1da177e4 LT	389
	390	dprintk("nfsd: RENAME(3) %s %.*s ->\n",
	391	SVCFH_fmt(&argp->ffh),
	392	argp->flen,
	393	argp->fname);
	394	dprintk("nfsd: -> %s %.*s\n",
	395	SVCFH_fmt(&argp->tfh),
	396	argp->tlen,
	397	argp->tname);
	398
	399	fh_copy(&resp->ffh, &argp->ffh);
	400	fh_copy(&resp->tfh, &argp->tfh);
	401	nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
	402	&resp->tfh, argp->tname, argp->tlen);
	403	RETURN_STATUS(nfserr);
	404	}
	405
7111c66e	406	static __be32
1da177e4 LT	407	nfsd3_proc_link(struct svc_rqst rqstp, struct nfsd3_linkargs argp,
	408	struct nfsd3_linkres *resp)
	409	{
c4d987ba	410	__be32 nfserr;
1da177e4 LT	411
	412	dprintk("nfsd: LINK(3) %s ->\n",
	413	SVCFH_fmt(&argp->ffh));
	414	dprintk("nfsd: -> %s %.*s\n",
	415	SVCFH_fmt(&argp->tfh),
	416	argp->tlen,
	417	argp->tname);
	418
	419	fh_copy(&resp->fh, &argp->ffh);
	420	fh_copy(&resp->tfh, &argp->tfh);
	421	nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
	422	&resp->fh);
	423	RETURN_STATUS(nfserr);
	424	}
	425
	426	/*
	427	* Read a portion of a directory.
	428	*/
7111c66e	429	static __be32
1da177e4 LT	430	nfsd3_proc_readdir(struct svc_rqst rqstp, struct nfsd3_readdirargs argp,
	431	struct nfsd3_readdirres *resp)
	432	{
c4d987ba AV	433	__be32 nfserr;
c4d987ba AV	434	int count;
1da177e4 LT	435
	436	dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
	437	SVCFH_fmt(&argp->fh),
	438	argp->count, (u32) argp->cookie);
	439
	440	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
	441	* client read size */
	442	count = (argp->count >> 2) - 2;
	443
	444	/* Read directory and encode entries on the fly */
	445	fh_copy(&resp->fh, &argp->fh);
	446
	447	resp->buflen = count;
	448	resp->common.err = nfs_ok;
	449	resp->buffer = argp->buffer;
	450	resp->rqstp = rqstp;
	451	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
	452	&resp->common, nfs3svc_encode_entry);
	453	memcpy(resp->verf, argp->verf, 8);
	454	resp->count = resp->buffer - argp->buffer;
	455	if (resp->offset)
	456	xdr_encode_hyper(resp->offset, argp->cookie);
	457
	458	RETURN_STATUS(nfserr);
	459	}
	460
	461	/*
	462	* Read a portion of a directory, including file handles and attrs.
	463	* For now, we choose to ignore the dircount parameter.
	464	*/
7111c66e	465	static __be32
1da177e4 LT	466	nfsd3_proc_readdirplus(struct svc_rqst rqstp, struct nfsd3_readdirargs argp,
	467	struct nfsd3_readdirres *resp)
	468	{
c4d987ba AV	469	__be32 nfserr;
c4d987ba AV	470	int count = 0;
1da177e4 LT	471	loff_t offset;
	472	int i;
	473	caddr_t page_addr = NULL;
	474
	475	dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
	476	SVCFH_fmt(&argp->fh),
	477	argp->count, (u32) argp->cookie);
	478
	479	/* Convert byte count to number of words (i.e. >> 2),
	480	* and reserve room for the NULL ptr & eof flag (-2 words) */
	481	resp->count = (argp->count >> 2) - 2;
	482
	483	/* Read directory and encode entries on the fly */
	484	fh_copy(&resp->fh, &argp->fh);
	485
	486	resp->common.err = nfs_ok;
	487	resp->buffer = argp->buffer;
	488	resp->buflen = resp->count;
	489	resp->rqstp = rqstp;
	490	offset = argp->cookie;
	491	nfserr = nfsd_readdir(rqstp, &resp->fh,
	492	&offset,
	493	&resp->common,
	494	nfs3svc_encode_entry_plus);
	495	memcpy(resp->verf, argp->verf, 8);
	496	for (i=1; i<rqstp->rq_resused ; i++) {
	497	page_addr = page_address(rqstp->rq_respages[i]);
	498
	499	if (((caddr_t)resp->buffer >= page_addr) &&
	500	((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
	501	count += (caddr_t)resp->buffer - page_addr;
	502	break;
	503	}
	504	count += PAGE_SIZE;
	505	}
	506	resp->count = count >> 2;
	507	if (resp->offset) {
	508	if (unlikely(resp->offset1)) {
	509	/* we ended up with offset on a page boundary */
	510	*resp->offset = htonl(offset >> 32);
	511	*resp->offset1 = htonl(offset & 0xffffffff);
	512	resp->offset1 = NULL;
	513	} else {
	514	xdr_encode_hyper(resp->offset, offset);
	515	}
	516	}
	517
	518	RETURN_STATUS(nfserr);
	519	}
	520
	521	/*
	522	* Get file system stats
	523	*/
7111c66e	524	static __be32
1da177e4 LT	525	nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
	526	struct nfsd3_fsstatres *resp)
	527	{
c4d987ba	528	__be32 nfserr;
1da177e4 LT	529
	530	dprintk("nfsd: FSSTAT(3) %s\n",
	531	SVCFH_fmt(&argp->fh));
	532
	533	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
	534	fh_put(&argp->fh);
	535	RETURN_STATUS(nfserr);
	536	}
	537
	538	/*
	539	* Get file system info
	540	*/
7111c66e	541	static __be32
1da177e4 LT	542	nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
	543	struct nfsd3_fsinfores *resp)
	544	{
c4d987ba	545	__be32 nfserr;
7adae489	546	u32 max_blocksize = svc_max_payload(rqstp);
1da177e4 LT	547
	548	dprintk("nfsd: FSINFO(3) %s\n",
	549	SVCFH_fmt(&argp->fh));
	550
7adae489 GB	551	resp->f_rtmax = max_blocksize;
7adae489 GB	552	resp->f_rtpref = max_blocksize;
1da177e4	553	resp->f_rtmult = PAGE_SIZE;
7adae489 GB	554	resp->f_wtmax = max_blocksize;
7adae489 GB	555	resp->f_wtpref = max_blocksize;
1da177e4 LT	556	resp->f_wtmult = PAGE_SIZE;
	557	resp->f_dtpref = PAGE_SIZE;
	558	resp->f_maxfilesize = ~(u32) 0;
	559	resp->f_properties = NFS3_FSF_DEFAULT;
	560
	561	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
	562
	563	/* Check special features of the file system. May request
	564	* different read/write sizes for file systems known to have
	565	* problems with large blocks */
	566	if (nfserr == 0) {
	567	struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
	568
	569	/* Note that we don't care for remote fs's here */
	570	if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
	571	resp->f_properties = NFS3_FSF_BILLYBOY;
	572	}
	573	resp->f_maxfilesize = sb->s_maxbytes;
	574	}
	575
	576	fh_put(&argp->fh);
	577	RETURN_STATUS(nfserr);
	578	}
	579
	580	/*
	581	* Get pathconf info for the specified file
	582	*/
7111c66e	583	static __be32
1da177e4 LT	584	nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
	585	struct nfsd3_pathconfres *resp)
	586	{
c4d987ba	587	__be32 nfserr;
1da177e4 LT	588
	589	dprintk("nfsd: PATHCONF(3) %s\n",
	590	SVCFH_fmt(&argp->fh));
	591
	592	/* Set default pathconf */
	593	resp->p_link_max = 255; /* at least */
	594	resp->p_name_max = 255; /* at least */
	595	resp->p_no_trunc = 0;
	596	resp->p_chown_restricted = 1;
	597	resp->p_case_insensitive = 0;
	598	resp->p_case_preserving = 1;
	599
	600	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
	601
	602	if (nfserr == 0) {
	603	struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
	604
	605	/* Note that we don't care for remote fs's here */
	606	switch (sb->s_magic) {
	607	case EXT2_SUPER_MAGIC:
	608	resp->p_link_max = EXT2_LINK_MAX;
	609	resp->p_name_max = EXT2_NAME_LEN;
	610	break;
	611	case 0x4d44: /* MSDOS_SUPER_MAGIC */
	612	resp->p_case_insensitive = 1;
	613	resp->p_case_preserving = 0;
	614	break;
	615	}
	616	}
	617
	618	fh_put(&argp->fh);
	619	RETURN_STATUS(nfserr);
	620	}
	621
	622
	623	/*
	624	* Commit a file (range) to stable storage.
	625	*/
7111c66e	626	static __be32
1da177e4 LT	627	nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
	628	struct nfsd3_commitres *resp)
	629	{
c4d987ba	630	__be32 nfserr;
1da177e4 LT	631
	632	dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
	633	SVCFH_fmt(&argp->fh),
	634	argp->count,
	635	(unsigned long long) argp->offset);
	636
	637	if (argp->offset > NFS_OFFSET_MAX)
	638	RETURN_STATUS(nfserr_inval);
	639
	640	fh_copy(&resp->fh, &argp->fh);
	641	nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
	642
	643	RETURN_STATUS(nfserr);
	644	}
	645
	646
	647	/*
	648	* NFSv3 Server procedures.
	649	* Only the results of non-idempotent operations are cached.
	650	*/
	651	#define nfs3svc_decode_voidargs NULL
	652	#define nfs3svc_release_void NULL
	653	#define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
	654	#define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
	655	#define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
	656	#define nfsd3_mkdirargs nfsd3_createargs
	657	#define nfsd3_readdirplusargs nfsd3_readdirargs
	658	#define nfsd3_fhandleargs nfsd_fhandle
	659	#define nfsd3_fhandleres nfsd3_attrstat
	660	#define nfsd3_attrstatres nfsd3_attrstat
	661	#define nfsd3_wccstatres nfsd3_attrstat
	662	#define nfsd3_createres nfsd3_diropres
	663	#define nfsd3_voidres nfsd3_voidargs
	664	struct nfsd3_voidargs { int dummy; };
	665
	666	#define PROC(name, argt, rest, relt, cache, respsize) \
	667	{ (svc_procfunc) nfsd3_proc_##name, \
	668	(kxdrproc_t) nfs3svc_decode_##argt##args, \
	669	(kxdrproc_t) nfs3svc_encode_##rest##res, \
	670	(kxdrproc_t) nfs3svc_release_##relt, \
	671	sizeof(struct nfsd3_##argt##args), \
	672	sizeof(struct nfsd3_##rest##res), \
	673	0, \
	674	cache, \
	675	respsize, \
	676	}
	677
	678	#define ST 1 /* status*/
	679	#define FH 17 /* filehandle with length */
	680	#define AT 21 /* attributes */
	681	#define pAT (1+AT) /* post attributes - conditional */
	682	#define WC (7+pAT) /* WCC attributes */
	683
	684	static struct svc_procedure nfsd_procedures3[22] = {
	685	PROC(null, void, void, void, RC_NOCACHE, ST),
	686	PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
	687	PROC(setattr, sattr, wccstat, fhandle, RC_REPLBUFF, ST+WC),
	688	PROC(lookup, dirop, dirop, fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
	689	PROC(access, access, access, fhandle, RC_NOCACHE, ST+pAT+1),
	690	PROC(readlink, readlink, readlink, fhandle, RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
7775f4c8	691	PROC(read, read, read, fhandle, RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE/4),
1da177e4 LT	692	PROC(write, write, write, fhandle, RC_REPLBUFF, ST+WC+4),
	693	PROC(create, create, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
	694	PROC(mkdir, mkdir, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
	695	PROC(symlink, symlink, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
	696	PROC(mknod, mknod, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
	697	PROC(remove, dirop, wccstat, fhandle, RC_REPLBUFF, ST+WC),
	698	PROC(rmdir, dirop, wccstat, fhandle, RC_REPLBUFF, ST+WC),
	699	PROC(rename, rename, rename, fhandle2, RC_REPLBUFF, ST+WC+WC),
	700	PROC(link, link, link, fhandle2, RC_REPLBUFF, ST+pAT+WC),
	701	PROC(readdir, readdir, readdir, fhandle, RC_NOCACHE, 0),
	702	PROC(readdirplus,readdirplus, readdir, fhandle, RC_NOCACHE, 0),
	703	PROC(fsstat, fhandle, fsstat, void, RC_NOCACHE, ST+pAT+2*6+1),
	704	PROC(fsinfo, fhandle, fsinfo, void, RC_NOCACHE, ST+pAT+12),
	705	PROC(pathconf, fhandle, pathconf, void, RC_NOCACHE, ST+pAT+6),
	706	PROC(commit, commit, commit, fhandle, RC_NOCACHE, ST+WC+2),
	707	};
	708
	709	struct svc_version nfsd_version3 = {
	710	.vs_vers = 3,
	711	.vs_nproc = 22,
	712	.vs_proc = nfsd_procedures3,
	713	.vs_dispatch = nfsd_dispatch,
	714	.vs_xdrsize = NFS3_SVC_XDRSIZE,
	715	};