nfs42.h 2.3 KB

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