[linux.git] / fs / nfs / proc.c

/*
 *  linux/fs/nfs/proc.c
 *
 *  Copyright (C) 1992, 1993, 1994  Rick Sladkey
 *
 *  OS-independent nfs remote procedure call functions
 *
 *  Tuned by Alan Cox <[email protected]> for >3K buffers
 *  so at last we can have decent(ish) throughput off a 
 *  Sun server.
 *
 *  Coding optimized and cleaned up by Florian La Roche.
 *  Note: Error returns are optimized for NFS_OK, which isn't translated via
 *  nfs_stat_to_errno(), but happens to be already the right return code.
 *
 *  Also, the code currently doesn't check the size of the packet, when
 *  it decodes the packet.
 *
 *  Feel free to fix it and mail me the diffs if it worries you.
 *
 *  Completely rewritten to support the new RPC call interface;
 *  rewrote and moved the entire XDR stuff to xdr.c
 *  --Olaf Kirch June 1996
 *
 *  The code below initializes all auto variables explicitly, otherwise
 *  it will fail to work as a module (gcc generates a memset call for an
 *  incomplete struct).
 */

#include <linux/types.h>
#include <linux/param.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/pagemap.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/lockd/bind.h>
#include "internal.h"

#define NFSDBG_FACILITY		NFSDBG_PROC

/*
 * Bare-bones access to getattr: this is for nfs_read_super.
 */
static int
nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
		  struct nfs_fsinfo *info)
{
	struct nfs_fattr *fattr = info->fattr;
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_GETATTR],
		.rpc_argp	= fhandle,
		.rpc_resp	= fattr,
	};
	int status;

	dprintk("%s: call getattr\n", __func__);
	nfs_fattr_init(fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	/* Retry with default authentication if different */
	if (status && server->nfs_client->cl_rpcclient != server->client)
		status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
	dprintk("%s: reply getattr: %d\n", __func__, status);
	if (status)
		return status;
	dprintk("%s: call statfs\n", __func__);
	msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
	msg.rpc_resp = &fsinfo;
	status = rpc_call_sync(server->client, &msg, 0);
	/* Retry with default authentication if different */
	if (status && server->nfs_client->cl_rpcclient != server->client)
		status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
	dprintk("%s: reply statfs: %d\n", __func__, status);
	if (status)
		return status;
	info->rtmax  = NFS_MAXDATA;
	info->rtpref = fsinfo.tsize;
	info->rtmult = fsinfo.bsize;
	info->wtmax  = NFS_MAXDATA;
	info->wtpref = fsinfo.tsize;
	info->wtmult = fsinfo.bsize;
	info->dtpref = fsinfo.tsize;
	info->maxfilesize = 0x7FFFFFFF;
	info->lease_time = 0;
	return 0;
}

/*
 * One function for each procedure in the NFS protocol.
 */
static int
nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_fattr *fattr)
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_GETATTR],
		.rpc_argp	= fhandle,
		.rpc_resp	= fattr,
	};
	int	status;

	dprintk("NFS call  getattr\n");
	nfs_fattr_init(fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply getattr: %d\n", status);
	return status;
}

static int
nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
		 struct iattr *sattr)
{
	struct inode *inode = dentry->d_inode;
	struct nfs_sattrargs	arg = { 
		.fh	= NFS_FH(inode),
		.sattr	= sattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_SETATTR],
		.rpc_argp	= &arg,
		.rpc_resp	= fattr,
	};
	int	status;

	/* Mask out the non-modebit related stuff from attr->ia_mode */
	sattr->ia_mode &= S_IALLUGO;

	dprintk("NFS call  setattr\n");
	if (sattr->ia_valid & ATTR_FILE)
		msg.rpc_cred = nfs_file_cred(sattr->ia_file);
	nfs_fattr_init(fattr);
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	if (status == 0)
		nfs_setattr_update_inode(inode, sattr);
	dprintk("NFS reply setattr: %d\n", status);
	return status;
}

static int
nfs_proc_lookup(struct inode *dir, struct qstr *name,
		struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
	struct nfs_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct nfs_diropok	res = {
		.fh		= fhandle,
		.fattr		= fattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_LOOKUP],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int			status;

	dprintk("NFS call  lookup %s\n", name->name);
	nfs_fattr_init(fattr);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	dprintk("NFS reply lookup: %d\n", status);
	return status;
}

static int nfs_proc_readlink(struct inode *inode, struct page *page,
		unsigned int pgbase, unsigned int pglen)
{
	struct nfs_readlinkargs	args = {
		.fh		= NFS_FH(inode),
		.pgbase		= pgbase,
		.pglen		= pglen,
		.pages		= &page
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_READLINK],
		.rpc_argp	= &args,
	};
	int			status;

	dprintk("NFS call  readlink\n");
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	dprintk("NFS reply readlink: %d\n", status);
	return status;
}

static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
		int flags, struct nameidata *nd)
{
	struct nfs_fh		fhandle;
	struct nfs_fattr	fattr;
	struct nfs_createargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= dentry->d_name.name,
		.len		= dentry->d_name.len,
		.sattr		= sattr
	};
	struct nfs_diropok	res = {
		.fh		= &fhandle,
		.fattr		= &fattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_CREATE],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int			status;

	nfs_fattr_init(&fattr);
	dprintk("NFS call  create %s\n", dentry->d_name.name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	if (status == 0)
		status = nfs_instantiate(dentry, &fhandle, &fattr);
	dprintk("NFS reply create: %d\n", status);
	return status;
}

/*
 * In NFSv2, mknod is grafted onto the create call.
 */
static int
nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
	       dev_t rdev)
{
	struct nfs_fh fhandle;
	struct nfs_fattr fattr;
	struct nfs_createargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= dentry->d_name.name,
		.len		= dentry->d_name.len,
		.sattr		= sattr
	};
	struct nfs_diropok	res = {
		.fh		= &fhandle,
		.fattr		= &fattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_CREATE],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int status, mode;

	dprintk("NFS call  mknod %s\n", dentry->d_name.name);

	mode = sattr->ia_mode;
	if (S_ISFIFO(mode)) {
		sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
		sattr->ia_valid &= ~ATTR_SIZE;
	} else if (S_ISCHR(mode) || S_ISBLK(mode)) {
		sattr->ia_valid |= ATTR_SIZE;
		sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
	}

	nfs_fattr_init(&fattr);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	if (status == -EINVAL && S_ISFIFO(mode)) {
		sattr->ia_mode = mode;
		nfs_fattr_init(&fattr);
		status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	}
	if (status == 0)
		status = nfs_instantiate(dentry, &fhandle, &fattr);
	dprintk("NFS reply mknod: %d\n", status);
	return status;
}
  
static int
nfs_proc_remove(struct inode *dir, struct qstr *name)
{
	struct nfs_removeargs arg = {
		.fh = NFS_FH(dir),
		.name.len = name->len,
		.name.name = name->name,
	};
	struct rpc_message msg = { 
		.rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
		.rpc_argp = &arg,
	};
	int			status;

	dprintk("NFS call  remove %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	dprintk("NFS reply remove: %d\n", status);
	return status;
}

static void
nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
}

static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
	nfs_mark_for_revalidate(dir);
	return 1;
}

static int
nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
		struct inode *new_dir, struct qstr *new_name)
{
	struct nfs_renameargs	arg = {
		.fromfh		= NFS_FH(old_dir),
		.fromname	= old_name->name,
		.fromlen	= old_name->len,
		.tofh		= NFS_FH(new_dir),
		.toname		= new_name->name,
		.tolen		= new_name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RENAME],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
	nfs_mark_for_revalidate(old_dir);
	nfs_mark_for_revalidate(new_dir);
	dprintk("NFS reply rename: %d\n", status);
	return status;
}

static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_LINK],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  link %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_mark_for_revalidate(inode);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		 unsigned int len, struct iattr *sattr)
{
	struct nfs_fh fhandle;
	struct nfs_fattr fattr;
	struct nfs_symlinkargs	arg = {
		.fromfh		= NFS_FH(dir),
		.fromname	= dentry->d_name.name,
		.fromlen	= dentry->d_name.len,
		.pages		= &page,
		.pathlen	= len,
		.sattr		= sattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_SYMLINK],
		.rpc_argp	= &arg,
	};
	int			status;

	if (len > NFS2_MAXPATHLEN)
		return -ENAMETOOLONG;

	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	/*
	 * V2 SYMLINK requests don't return any attributes.  Setting the
	 * filehandle size to zero indicates to nfs_instantiate that it
	 * should fill in the data with a LOOKUP call on the wire.
	 */
	if (status == 0) {
		nfs_fattr_init(&fattr);
		fhandle.size = 0;
		status = nfs_instantiate(dentry, &fhandle, &fattr);
	}

	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
	struct nfs_fh fhandle;
	struct nfs_fattr fattr;
	struct nfs_createargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= dentry->d_name.name,
		.len		= dentry->d_name.len,
		.sattr		= sattr
	};
	struct nfs_diropok	res = {
		.fh		= &fhandle,
		.fattr		= &fattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_MKDIR],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int			status;

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
	nfs_fattr_init(&fattr);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	if (status == 0)
		status = nfs_instantiate(dentry, &fhandle, &fattr);
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RMDIR],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rmdir %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass a temporary
 * buffer to the encode function, which installs it in the receive
 * the receive iovec. The decode function just parses the reply to make
 * sure it is syntactically correct; the entries itself are decoded
 * from nfs_readdir by calling the decode_entry function directly.
 */
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		 u64 cookie, struct page *page, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.count		= count,
		.pages		= &page,
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_cred	= cred,
	};
	int			status;

	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

	nfs_invalidate_atime(dir);

	dprintk("NFS reply readdir: %d\n", status);
	return status;
}

static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsstat *stat)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  statfs\n");
	nfs_fattr_init(stat->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply statfs: %d\n", status);
	if (status)
		goto out;
	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
	stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
	stat->tfiles = 0;
	stat->ffiles = 0;
	stat->afiles = 0;
out:
	return status;
}

static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsinfo *info)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  fsinfo\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply fsinfo: %d\n", status);
	if (status)
		goto out;
	info->rtmax  = NFS_MAXDATA;
	info->rtpref = fsinfo.tsize;
	info->rtmult = fsinfo.bsize;
	info->wtmax  = NFS_MAXDATA;
	info->wtpref = fsinfo.tsize;
	info->wtmult = fsinfo.bsize;
	info->dtpref = fsinfo.tsize;
	info->maxfilesize = 0x7FFFFFFF;
	info->lease_time = 0;
out:
	return status;
}

static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		  struct nfs_pathconf *info)
{
	info->max_link = 0;
	info->max_namelen = NFS2_MAXNAMLEN;
	return 0;
}

static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
	nfs_invalidate_atime(data->inode);
	if (task->tk_status >= 0) {
		nfs_refresh_inode(data->inode, data->res.fattr);
		/* Emulate the eof flag, which isn't normally needed in NFSv2
		 * as it is guaranteed to always return the file attributes
		 */
		if (data->args.offset + data->args.count >= data->res.fattr->size)
			data->res.eof = 1;
	}
	return 0;
}

static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
}

static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
	if (task->tk_status >= 0)
		nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
	return 0;
}

static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
	data->args.stable = NFS_FILE_SYNC;
	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}

static void
nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	BUG();
}

static int
nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
	struct inode *inode = filp->f_path.dentry->d_inode;

	return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
}

/* Helper functions for NFS lock bounds checking */
#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
static int nfs_lock_check_bounds(const struct file_lock *fl)
{
	__s32 start, end;

	start = (__s32)fl->fl_start;
	if ((loff_t)start != fl->fl_start)
		goto out_einval;

	if (fl->fl_end != OFFSET_MAX) {
		end = (__s32)fl->fl_end;
		if ((loff_t)end != fl->fl_end)
			goto out_einval;
	} else
		end = NFS_LOCK32_OFFSET_MAX;

	if (start < 0 || start > end)
		goto out_einval;
	return 0;
out_einval:
	return -EINVAL;
}

const struct nfs_rpc_ops nfs_v2_clientops = {
	.version	= 2,		       /* protocol version */
	.dentry_ops	= &nfs_dentry_operations,
	.dir_inode_ops	= &nfs_dir_inode_operations,
	.file_inode_ops	= &nfs_file_inode_operations,
	.getroot	= nfs_proc_get_root,
	.getattr	= nfs_proc_getattr,
	.setattr	= nfs_proc_setattr,
	.lookup		= nfs_proc_lookup,
	.access		= NULL,		       /* access */
	.readlink	= nfs_proc_readlink,
	.create		= nfs_proc_create,
	.remove		= nfs_proc_remove,
	.unlink_setup	= nfs_proc_unlink_setup,
	.unlink_done	= nfs_proc_unlink_done,
	.rename		= nfs_proc_rename,
	.link		= nfs_proc_link,
	.symlink	= nfs_proc_symlink,
	.mkdir		= nfs_proc_mkdir,
	.rmdir		= nfs_proc_rmdir,
	.readdir	= nfs_proc_readdir,
	.mknod		= nfs_proc_mknod,
	.statfs		= nfs_proc_statfs,
	.fsinfo		= nfs_proc_fsinfo,
	.pathconf	= nfs_proc_pathconf,
	.decode_dirent	= nfs_decode_dirent,
	.read_setup	= nfs_proc_read_setup,
	.read_done	= nfs_read_done,
	.write_setup	= nfs_proc_write_setup,
	.write_done	= nfs_write_done,
	.commit_setup	= nfs_proc_commit_setup,
	.lock		= nfs_proc_lock,
	.lock_check_bounds = nfs_lock_check_bounds,
	.close_context	= nfs_close_context,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/nfs/proc.c
	3	*
	4	* Copyright (C) 1992, 1993, 1994 Rick Sladkey
	5	*
	6	* OS-independent nfs remote procedure call functions
	7	*
	8	* Tuned by Alan Cox <[email protected]> for >3K buffers
	9	* so at last we can have decent(ish) throughput off a
	10	* Sun server.
	11	*
	12	* Coding optimized and cleaned up by Florian La Roche.
	13	* Note: Error returns are optimized for NFS_OK, which isn't translated via
	14	* nfs_stat_to_errno(), but happens to be already the right return code.
	15	*
	16	* Also, the code currently doesn't check the size of the packet, when
	17	* it decodes the packet.
	18	*
	19	* Feel free to fix it and mail me the diffs if it worries you.
	20	*
	21	* Completely rewritten to support the new RPC call interface;
	22	* rewrote and moved the entire XDR stuff to xdr.c
	23	* --Olaf Kirch June 1996
	24	*
	25	* The code below initializes all auto variables explicitly, otherwise
	26	* it will fail to work as a module (gcc generates a memset call for an
	27	* incomplete struct).
	28	*/
	29
	30	#include <linux/types.h>
	31	#include <linux/param.h>
	32	#include <linux/slab.h>
	33	#include <linux/time.h>
	34	#include <linux/mm.h>
	35	#include <linux/utsname.h>
	36	#include <linux/errno.h>
	37	#include <linux/string.h>
	38	#include <linux/in.h>
	39	#include <linux/pagemap.h>
	40	#include <linux/sunrpc/clnt.h>
	41	#include <linux/nfs.h>
	42	#include <linux/nfs2.h>
	43	#include <linux/nfs_fs.h>
	44	#include <linux/nfs_page.h>
	45	#include <linux/lockd/bind.h>
f7b422b1	46	#include "internal.h"
1da177e4 LT	47
	48	#define NFSDBG_FACILITY NFSDBG_PROC
	49
1da177e4 LT	50	/*
	51	* Bare-bones access to getattr: this is for nfs_read_super.
	52	*/
	53	static int
	54	nfs_proc_get_root(struct nfs_server server, struct nfs_fh fhandle,
	55	struct nfs_fsinfo *info)
	56	{
	57	struct nfs_fattr *fattr = info->fattr;
	58	struct nfs2_fsstat fsinfo;
dead28da CL	59	struct rpc_message msg = {
	60	.rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
	61	.rpc_argp = fhandle,
	62	.rpc_resp = fattr,
	63	};
1da177e4 LT	64	int status;
1da177e4 LT	65
3110ff80	66	dprintk("%s: call getattr\n", __func__);
0e574af1	67	nfs_fattr_init(fattr);
37ca8f5c EK	68	status = rpc_call_sync(server->client, &msg, 0);
	69	/* Retry with default authentication if different */
	70	if (status && server->nfs_client->cl_rpcclient != server->client)
	71	status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
3110ff80	72	dprintk("%s: reply getattr: %d\n", __func__, status);
1da177e4 LT	73	if (status)
1da177e4 LT	74	return status;
3110ff80	75	dprintk("%s: call statfs\n", __func__);
dead28da CL	76	msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
dead28da CL	77	msg.rpc_resp = &fsinfo;
37ca8f5c EK	78	status = rpc_call_sync(server->client, &msg, 0);
	79	/* Retry with default authentication if different */
	80	if (status && server->nfs_client->cl_rpcclient != server->client)
	81	status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
3110ff80	82	dprintk("%s: reply statfs: %d\n", __func__, status);
1da177e4 LT	83	if (status)
	84	return status;
	85	info->rtmax = NFS_MAXDATA;
	86	info->rtpref = fsinfo.tsize;
	87	info->rtmult = fsinfo.bsize;
	88	info->wtmax = NFS_MAXDATA;
	89	info->wtpref = fsinfo.tsize;
	90	info->wtmult = fsinfo.bsize;
	91	info->dtpref = fsinfo.tsize;
	92	info->maxfilesize = 0x7FFFFFFF;
	93	info->lease_time = 0;
	94	return 0;
	95	}
	96
	97	/*
	98	* One function for each procedure in the NFS protocol.
	99	*/
	100	static int
	101	nfs_proc_getattr(struct nfs_server server, struct nfs_fh fhandle,
	102	struct nfs_fattr *fattr)
	103	{
dead28da CL	104	struct rpc_message msg = {
	105	.rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
	106	.rpc_argp = fhandle,
	107	.rpc_resp = fattr,
	108	};
1da177e4 LT	109	int status;
	110
	111	dprintk("NFS call getattr\n");
0e574af1	112	nfs_fattr_init(fattr);
dead28da	113	status = rpc_call_sync(server->client, &msg, 0);
1da177e4 LT	114	dprintk("NFS reply getattr: %d\n", status);
	115	return status;
	116	}
	117
	118	static int
	119	nfs_proc_setattr(struct dentry dentry, struct nfs_fattr fattr,
	120	struct iattr *sattr)
	121	{
	122	struct inode *inode = dentry->d_inode;
	123	struct nfs_sattrargs arg = {
	124	.fh = NFS_FH(inode),
	125	.sattr = sattr
	126	};
dead28da CL	127	struct rpc_message msg = {
	128	.rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
	129	.rpc_argp = &arg,
	130	.rpc_resp = fattr,
	131	};
1da177e4 LT	132	int status;
1da177e4 LT	133
cf3fff54 TM	134	/* Mask out the non-modebit related stuff from attr->ia_mode */
	135	sattr->ia_mode &= S_IALLUGO;
	136
1da177e4	137	dprintk("NFS call setattr\n");
659bfcd6 TM	138	if (sattr->ia_valid & ATTR_FILE)
659bfcd6 TM	139	msg.rpc_cred = nfs_file_cred(sattr->ia_file);
0e574af1	140	nfs_fattr_init(fattr);
dead28da	141	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
65e4308d TM	142	if (status == 0)
65e4308d TM	143	nfs_setattr_update_inode(inode, sattr);
1da177e4 LT	144	dprintk("NFS reply setattr: %d\n", status);
	145	return status;
	146	}
	147
	148	static int
	149	nfs_proc_lookup(struct inode dir, struct qstr name,
	150	struct nfs_fh fhandle, struct nfs_fattr fattr)
	151	{
	152	struct nfs_diropargs arg = {
	153	.fh = NFS_FH(dir),
	154	.name = name->name,
	155	.len = name->len
	156	};
	157	struct nfs_diropok res = {
	158	.fh = fhandle,
	159	.fattr = fattr
	160	};
dead28da CL	161	struct rpc_message msg = {
	162	.rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
	163	.rpc_argp = &arg,
	164	.rpc_resp = &res,
	165	};
1da177e4 LT	166	int status;
	167
	168	dprintk("NFS call lookup %s\n", name->name);
0e574af1	169	nfs_fattr_init(fattr);
dead28da	170	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1da177e4 LT	171	dprintk("NFS reply lookup: %d\n", status);
	172	return status;
	173	}
	174
	175	static int nfs_proc_readlink(struct inode inode, struct page page,
	176	unsigned int pgbase, unsigned int pglen)
	177	{
	178	struct nfs_readlinkargs args = {
	179	.fh = NFS_FH(inode),
	180	.pgbase = pgbase,
	181	.pglen = pglen,
	182	.pages = &page
	183	};
dead28da CL	184	struct rpc_message msg = {
	185	.rpc_proc = &nfs_procedures[NFSPROC_READLINK],
	186	.rpc_argp = &args,
	187	};
1da177e4 LT	188	int status;
	189
	190	dprintk("NFS call readlink\n");
dead28da	191	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1da177e4 LT	192	dprintk("NFS reply readlink: %d\n", status);
	193	return status;
	194	}
	195
1da177e4 LT	196	static int
1da177e4 LT	197	nfs_proc_create(struct inode dir, struct dentry dentry, struct iattr *sattr,
02a913a7	198	int flags, struct nameidata *nd)
1da177e4 LT	199	{
	200	struct nfs_fh fhandle;
	201	struct nfs_fattr fattr;
	202	struct nfs_createargs arg = {
	203	.fh = NFS_FH(dir),
	204	.name = dentry->d_name.name,
	205	.len = dentry->d_name.len,
	206	.sattr = sattr
	207	};
	208	struct nfs_diropok res = {
	209	.fh = &fhandle,
	210	.fattr = &fattr
	211	};
dead28da CL	212	struct rpc_message msg = {
	213	.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
	214	.rpc_argp = &arg,
	215	.rpc_resp = &res,
	216	};
1da177e4 LT	217	int status;
1da177e4 LT	218
0e574af1	219	nfs_fattr_init(&fattr);
1da177e4	220	dprintk("NFS call create %s\n", dentry->d_name.name);
dead28da	221	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
bad2a524	222	nfs_mark_for_revalidate(dir);
1da177e4 LT	223	if (status == 0)
	224	status = nfs_instantiate(dentry, &fhandle, &fattr);
	225	dprintk("NFS reply create: %d\n", status);
	226	return status;
	227	}
	228
	229	/*
	230	* In NFSv2, mknod is grafted onto the create call.
	231	*/
	232	static int
	233	nfs_proc_mknod(struct inode dir, struct dentry dentry, struct iattr *sattr,
	234	dev_t rdev)
	235	{
	236	struct nfs_fh fhandle;
	237	struct nfs_fattr fattr;
	238	struct nfs_createargs arg = {
	239	.fh = NFS_FH(dir),
	240	.name = dentry->d_name.name,
	241	.len = dentry->d_name.len,
	242	.sattr = sattr
	243	};
	244	struct nfs_diropok res = {
	245	.fh = &fhandle,
	246	.fattr = &fattr
	247	};
dead28da CL	248	struct rpc_message msg = {
	249	.rpc_proc = &nfs_procedures[NFSPROC_CREATE],
	250	.rpc_argp = &arg,
	251	.rpc_resp = &res,
	252	};
1da177e4 LT	253	int status, mode;
	254
	255	dprintk("NFS call mknod %s\n", dentry->d_name.name);
	256
	257	mode = sattr->ia_mode;
	258	if (S_ISFIFO(mode)) {
	259	sattr->ia_mode = (mode & ~S_IFMT) \| S_IFCHR;
	260	sattr->ia_valid &= ~ATTR_SIZE;
	261	} else if (S_ISCHR(mode) \|\| S_ISBLK(mode)) {
	262	sattr->ia_valid \|= ATTR_SIZE;
	263	sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
	264	}
	265
0e574af1	266	nfs_fattr_init(&fattr);
dead28da	267	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
decf491f	268	nfs_mark_for_revalidate(dir);
1da177e4 LT	269
	270	if (status == -EINVAL && S_ISFIFO(mode)) {
	271	sattr->ia_mode = mode;
0e574af1	272	nfs_fattr_init(&fattr);
dead28da	273	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1da177e4 LT	274	}
	275	if (status == 0)
	276	status = nfs_instantiate(dentry, &fhandle, &fattr);
	277	dprintk("NFS reply mknod: %d\n", status);
	278	return status;
	279	}
	280
	281	static int
	282	nfs_proc_remove(struct inode dir, struct qstr name)
	283	{
4fdc17b2 TM	284	struct nfs_removeargs arg = {
	285	.fh = NFS_FH(dir),
	286	.name.len = name->len,
	287	.name.name = name->name,
1da177e4	288	};
4fdc17b2 TM	289	struct rpc_message msg = {
	290	.rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
	291	.rpc_argp = &arg,
1da177e4 LT	292	};
	293	int status;
	294
	295	dprintk("NFS call remove %s\n", name->name);
	296	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
decf491f	297	nfs_mark_for_revalidate(dir);
1da177e4 LT	298
	299	dprintk("NFS reply remove: %d\n", status);
	300	return status;
	301	}
	302
e4eff1a6 TM	303	static void
e4eff1a6 TM	304	nfs_proc_unlink_setup(struct rpc_message msg, struct inode dir)
1da177e4	305	{
1da177e4	306	msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
1da177e4 LT	307	}
1da177e4 LT	308
e4eff1a6	309	static int nfs_proc_unlink_done(struct rpc_task task, struct inode dir)
1da177e4	310	{
e4eff1a6 TM	311	nfs_mark_for_revalidate(dir);
e4eff1a6 TM	312	return 1;
1da177e4 LT	313	}
	314
	315	static int
	316	nfs_proc_rename(struct inode old_dir, struct qstr old_name,
	317	struct inode new_dir, struct qstr new_name)
	318	{
	319	struct nfs_renameargs arg = {
	320	.fromfh = NFS_FH(old_dir),
	321	.fromname = old_name->name,
	322	.fromlen = old_name->len,
	323	.tofh = NFS_FH(new_dir),
	324	.toname = new_name->name,
	325	.tolen = new_name->len
	326	};
dead28da CL	327	struct rpc_message msg = {
	328	.rpc_proc = &nfs_procedures[NFSPROC_RENAME],
	329	.rpc_argp = &arg,
	330	};
1da177e4 LT	331	int status;
	332
	333	dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
dead28da	334	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
decf491f TM	335	nfs_mark_for_revalidate(old_dir);
decf491f TM	336	nfs_mark_for_revalidate(new_dir);
1da177e4 LT	337	dprintk("NFS reply rename: %d\n", status);
	338	return status;
	339	}
	340
	341	static int
	342	nfs_proc_link(struct inode inode, struct inode dir, struct qstr *name)
	343	{
	344	struct nfs_linkargs arg = {
	345	.fromfh = NFS_FH(inode),
	346	.tofh = NFS_FH(dir),
	347	.toname = name->name,
	348	.tolen = name->len
	349	};
dead28da CL	350	struct rpc_message msg = {
	351	.rpc_proc = &nfs_procedures[NFSPROC_LINK],
	352	.rpc_argp = &arg,
	353	};
1da177e4 LT	354	int status;
	355
	356	dprintk("NFS call link %s\n", name->name);
dead28da	357	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
5ba7cc48	358	nfs_mark_for_revalidate(inode);
decf491f	359	nfs_mark_for_revalidate(dir);
1da177e4 LT	360	dprintk("NFS reply link: %d\n", status);
	361	return status;
	362	}
	363
	364	static int
94a6d753 CL	365	nfs_proc_symlink(struct inode dir, struct dentry dentry, struct page *page,
94a6d753 CL	366	unsigned int len, struct iattr *sattr)
1da177e4	367	{
4f390c15 CL	368	struct nfs_fh fhandle;
4f390c15 CL	369	struct nfs_fattr fattr;
1da177e4 LT	370	struct nfs_symlinkargs arg = {
1da177e4 LT	371	.fromfh = NFS_FH(dir),
4f390c15 CL	372	.fromname = dentry->d_name.name,
4f390c15 CL	373	.fromlen = dentry->d_name.len,
94a6d753 CL	374	.pages = &page,
94a6d753 CL	375	.pathlen = len,
1da177e4 LT	376	.sattr = sattr
1da177e4 LT	377	};
dead28da CL	378	struct rpc_message msg = {
	379	.rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
	380	.rpc_argp = &arg,
	381	};
1da177e4 LT	382	int status;
1da177e4 LT	383
94a6d753	384	if (len > NFS2_MAXPATHLEN)
1da177e4	385	return -ENAMETOOLONG;
4f390c15	386
94a6d753 CL	387	dprintk("NFS call symlink %s\n", dentry->d_name.name);
94a6d753 CL	388
dead28da	389	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
decf491f	390	nfs_mark_for_revalidate(dir);
4f390c15 CL	391
	392	/*
	393	* V2 SYMLINK requests don't return any attributes. Setting the
	394	* filehandle size to zero indicates to nfs_instantiate that it
	395	* should fill in the data with a LOOKUP call on the wire.
	396	*/
	397	if (status == 0) {
	398	nfs_fattr_init(&fattr);
	399	fhandle.size = 0;
	400	status = nfs_instantiate(dentry, &fhandle, &fattr);
	401	}
	402
1da177e4 LT	403	dprintk("NFS reply symlink: %d\n", status);
	404	return status;
	405	}
	406
	407	static int
	408	nfs_proc_mkdir(struct inode dir, struct dentry dentry, struct iattr *sattr)
	409	{
	410	struct nfs_fh fhandle;
	411	struct nfs_fattr fattr;
	412	struct nfs_createargs arg = {
	413	.fh = NFS_FH(dir),
	414	.name = dentry->d_name.name,
	415	.len = dentry->d_name.len,
	416	.sattr = sattr
	417	};
	418	struct nfs_diropok res = {
	419	.fh = &fhandle,
	420	.fattr = &fattr
	421	};
dead28da CL	422	struct rpc_message msg = {
	423	.rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
	424	.rpc_argp = &arg,
	425	.rpc_resp = &res,
	426	};
1da177e4 LT	427	int status;
	428
	429	dprintk("NFS call mkdir %s\n", dentry->d_name.name);
0e574af1	430	nfs_fattr_init(&fattr);
dead28da	431	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
decf491f	432	nfs_mark_for_revalidate(dir);
1da177e4 LT	433	if (status == 0)
	434	status = nfs_instantiate(dentry, &fhandle, &fattr);
	435	dprintk("NFS reply mkdir: %d\n", status);
	436	return status;
	437	}
	438
	439	static int
	440	nfs_proc_rmdir(struct inode dir, struct qstr name)
	441	{
	442	struct nfs_diropargs arg = {
	443	.fh = NFS_FH(dir),
	444	.name = name->name,
	445	.len = name->len
	446	};
dead28da CL	447	struct rpc_message msg = {
	448	.rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
	449	.rpc_argp = &arg,
	450	};
1da177e4 LT	451	int status;
	452
	453	dprintk("NFS call rmdir %s\n", name->name);
dead28da	454	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
decf491f	455	nfs_mark_for_revalidate(dir);
1da177e4 LT	456	dprintk("NFS reply rmdir: %d\n", status);
	457	return status;
	458	}
	459
	460	/*
	461	* The READDIR implementation is somewhat hackish - we pass a temporary
	462	* buffer to the encode function, which installs it in the receive
	463	* the receive iovec. The decode function just parses the reply to make
	464	* sure it is syntactically correct; the entries itself are decoded
	465	* from nfs_readdir by calling the decode_entry function directly.
	466	*/
	467	static int
	468	nfs_proc_readdir(struct dentry dentry, struct rpc_cred cred,
	469	u64 cookie, struct page *page, unsigned int count, int plus)
	470	{
	471	struct inode *dir = dentry->d_inode;
	472	struct nfs_readdirargs arg = {
	473	.fh = NFS_FH(dir),
	474	.cookie = cookie,
	475	.count = count,
dead28da	476	.pages = &page,
1da177e4 LT	477	};
	478	struct rpc_message msg = {
	479	.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
	480	.rpc_argp = &arg,
dead28da	481	.rpc_cred = cred,
1da177e4 LT	482	};
	483	int status;
	484
1da177e4 LT	485	dprintk("NFS call readdir %d\n", (unsigned int)cookie);
	486	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	487
c4812998 TM	488	nfs_invalidate_atime(dir);
c4812998 TM	489
1da177e4	490	dprintk("NFS reply readdir: %d\n", status);
1da177e4 LT	491	return status;
	492	}
	493
	494	static int
	495	nfs_proc_statfs(struct nfs_server server, struct nfs_fh fhandle,
	496	struct nfs_fsstat *stat)
	497	{
	498	struct nfs2_fsstat fsinfo;
dead28da CL	499	struct rpc_message msg = {
	500	.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
	501	.rpc_argp = fhandle,
	502	.rpc_resp = &fsinfo,
	503	};
1da177e4 LT	504	int status;
	505
	506	dprintk("NFS call statfs\n");
0e574af1	507	nfs_fattr_init(stat->fattr);
dead28da	508	status = rpc_call_sync(server->client, &msg, 0);
1da177e4 LT	509	dprintk("NFS reply statfs: %d\n", status);
	510	if (status)
	511	goto out;
	512	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
	513	stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
	514	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
	515	stat->tfiles = 0;
	516	stat->ffiles = 0;
	517	stat->afiles = 0;
	518	out:
	519	return status;
	520	}
	521
	522	static int
	523	nfs_proc_fsinfo(struct nfs_server server, struct nfs_fh fhandle,
	524	struct nfs_fsinfo *info)
	525	{
	526	struct nfs2_fsstat fsinfo;
dead28da CL	527	struct rpc_message msg = {
	528	.rpc_proc = &nfs_procedures[NFSPROC_STATFS],
	529	.rpc_argp = fhandle,
	530	.rpc_resp = &fsinfo,
	531	};
1da177e4 LT	532	int status;
	533
	534	dprintk("NFS call fsinfo\n");
0e574af1	535	nfs_fattr_init(info->fattr);
dead28da	536	status = rpc_call_sync(server->client, &msg, 0);
1da177e4 LT	537	dprintk("NFS reply fsinfo: %d\n", status);
	538	if (status)
	539	goto out;
	540	info->rtmax = NFS_MAXDATA;
	541	info->rtpref = fsinfo.tsize;
	542	info->rtmult = fsinfo.bsize;
	543	info->wtmax = NFS_MAXDATA;
	544	info->wtpref = fsinfo.tsize;
	545	info->wtmult = fsinfo.bsize;
	546	info->dtpref = fsinfo.tsize;
	547	info->maxfilesize = 0x7FFFFFFF;
	548	info->lease_time = 0;
	549	out:
	550	return status;
	551	}
	552
	553	static int
	554	nfs_proc_pathconf(struct nfs_server server, struct nfs_fh fhandle,
	555	struct nfs_pathconf *info)
	556	{
	557	info->max_link = 0;
	558	info->max_namelen = NFS2_MAXNAMLEN;
	559	return 0;
	560	}
	561
ec06c096	562	static int nfs_read_done(struct rpc_task task, struct nfs_read_data data)
1da177e4	563	{
8850df99	564	nfs_invalidate_atime(data->inode);
1da177e4 LT	565	if (task->tk_status >= 0) {
	566	nfs_refresh_inode(data->inode, data->res.fattr);
	567	/* Emulate the eof flag, which isn't normally needed in NFSv2
	568	* as it is guaranteed to always return the file attributes
	569	*/
	570	if (data->args.offset + data->args.count >= data->res.fattr->size)
	571	data->res.eof = 1;
	572	}
ec06c096	573	return 0;
1da177e4 LT	574	}
1da177e4 LT	575
bdc7f021	576	static void nfs_proc_read_setup(struct nfs_read_data data, struct rpc_message msg)
1da177e4	577	{
bdc7f021	578	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
1da177e4 LT	579	}
1da177e4 LT	580
788e7a89	581	static int nfs_write_done(struct rpc_task task, struct nfs_write_data data)
1da177e4	582	{
1da177e4	583	if (task->tk_status >= 0)
70ca8852	584	nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
788e7a89	585	return 0;
1da177e4 LT	586	}
1da177e4 LT	587
bdc7f021	588	static void nfs_proc_write_setup(struct nfs_write_data data, struct rpc_message msg)
1da177e4	589	{
1da177e4 LT	590	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
1da177e4 LT	591	data->args.stable = NFS_FILE_SYNC;
bdc7f021	592	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
1da177e4 LT	593	}
	594
	595	static void
bdc7f021	596	nfs_proc_commit_setup(struct nfs_write_data data, struct rpc_message msg)
1da177e4 LT	597	{
	598	BUG();
	599	}
	600
	601	static int
	602	nfs_proc_lock(struct file filp, int cmd, struct file_lock fl)
	603	{
1093a60e CL	604	struct inode *inode = filp->f_path.dentry->d_inode;
	605
	606	return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
1da177e4 LT	607	}
1da177e4 LT	608
2116271a TM	609	/* Helper functions for NFS lock bounds checking */
	610	#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
	611	static int nfs_lock_check_bounds(const struct file_lock *fl)
	612	{
	613	__s32 start, end;
	614
	615	start = (__s32)fl->fl_start;
	616	if ((loff_t)start != fl->fl_start)
	617	goto out_einval;
	618
	619	if (fl->fl_end != OFFSET_MAX) {
	620	end = (__s32)fl->fl_end;
	621	if ((loff_t)end != fl->fl_end)
	622	goto out_einval;
	623	} else
	624	end = NFS_LOCK32_OFFSET_MAX;
	625
	626	if (start < 0 \|\| start > end)
	627	goto out_einval;
	628	return 0;
	629	out_einval:
	630	return -EINVAL;
	631	}
1da177e4	632
509de811	633	const struct nfs_rpc_ops nfs_v2_clientops = {
1da177e4 LT	634	.version = 2, /* protocol version */
	635	.dentry_ops = &nfs_dentry_operations,
	636	.dir_inode_ops = &nfs_dir_inode_operations,
92cfc62c	637	.file_inode_ops = &nfs_file_inode_operations,
1da177e4 LT	638	.getroot = nfs_proc_get_root,
	639	.getattr = nfs_proc_getattr,
	640	.setattr = nfs_proc_setattr,
	641	.lookup = nfs_proc_lookup,
	642	.access = NULL, /* access */
	643	.readlink = nfs_proc_readlink,
1da177e4 LT	644	.create = nfs_proc_create,
	645	.remove = nfs_proc_remove,
	646	.unlink_setup = nfs_proc_unlink_setup,
	647	.unlink_done = nfs_proc_unlink_done,
	648	.rename = nfs_proc_rename,
	649	.link = nfs_proc_link,
	650	.symlink = nfs_proc_symlink,
	651	.mkdir = nfs_proc_mkdir,
	652	.rmdir = nfs_proc_rmdir,
	653	.readdir = nfs_proc_readdir,
	654	.mknod = nfs_proc_mknod,
	655	.statfs = nfs_proc_statfs,
	656	.fsinfo = nfs_proc_fsinfo,
	657	.pathconf = nfs_proc_pathconf,
	658	.decode_dirent = nfs_decode_dirent,
	659	.read_setup = nfs_proc_read_setup,
ec06c096	660	.read_done = nfs_read_done,
1da177e4	661	.write_setup = nfs_proc_write_setup,
788e7a89	662	.write_done = nfs_write_done,
1da177e4	663	.commit_setup = nfs_proc_commit_setup,
1da177e4	664	.lock = nfs_proc_lock,
2116271a	665	.lock_check_bounds = nfs_lock_check_bounds,
7fe5c398	666	.close_context = nfs_close_context,
1da177e4	667	};