LXR linux/fs/nfs/nfs42.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
   4 */
   5
   6#ifndef __LINUX_FS_NFS_NFS4_2_H
   7#define __LINUX_FS_NFS_NFS4_2_H
   8
   9#include <linux/xattr.h>
  10
  11/*
  12 * FIXME:  four LAYOUTSTATS calls per compound at most! Do we need to support
  13 * more? Need to consider not to pre-alloc too much for a compound.
  14 */
  15#define PNFS_LAYOUTSTATS_MAXDEV (4)
  16
  17/* nfs4.2proc.c */
  18#ifdef CONFIG_NFS_V4_2
  19int nfs42_proc_allocate(struct file *, loff_t, loff_t);
  20ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t,
  21                        struct nl4_server *, nfs4_stateid *, bool);
  22int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
  23loff_t nfs42_proc_llseek(struct file *, loff_t, int);
  24int nfs42_proc_layoutstats_generic(struct nfs_server *,
  25                                   struct nfs42_layoutstat_data *);
  26int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
  27int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
  28                           const struct nfs42_layout_error *errors,
  29                           size_t n);
  30int nfs42_proc_copy_notify(struct file *, struct file *,
  31                           struct nfs42_copy_notify_res *);
  32static inline bool nfs42_files_from_same_server(struct file *in,
  33                                                struct file *out)
  34{
  35        struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
  36        struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
  37
  38        return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
  39                                               c_out->cl_serverowner);
  40}
  41
  42ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
  43                            void *buf, size_t buflen);
  44int nfs42_proc_setxattr(struct inode *inode, const char *name,
  45                        const void *buf, size_t buflen, int flags);
  46ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
  47                               size_t buflen, u64 *cookiep, bool *eofp);
  48int nfs42_proc_removexattr(struct inode *inode, const char *name);
  49
  50/*
  51 * Maximum XDR buffer size needed for a listxattr buffer of buflen size.
  52 *
  53 * The upper boundary is a buffer with all 1-byte sized attribute names.
  54 * They would be 7 bytes long in the eventual buffer ("user.x\0"), and
  55 * 8 bytes long XDR-encoded.
  56 *
  57 * Include the trailing eof word as well.
  58 */
  59static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
  60{
  61        return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4;
  62}
  63#endif /* CONFIG_NFS_V4_2 */
  64#endif /* __LINUX_FS_NFS_NFS4_2_H */
  65