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 #define READ_PLUS_SCRATCH_SIZE (16) 17 18 /* nfs4.2proc.c */ 19 #ifdef CONFIG_NFS_V4_2 20 int nfs42_proc_allocate(struct file *, loff_t, loff_t); 21 ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t, 22 struct nl4_server *, nfs4_stateid *, bool); 23 int nfs42_proc_deallocate(struct file *, loff_t, loff_t); 24 loff_t nfs42_proc_llseek(struct file *, loff_t, int); 25 int nfs42_proc_layoutstats_generic(struct nfs_server *, 26 struct nfs42_layoutstat_data *); 27 int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t); 28 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg, 29 const struct nfs42_layout_error *errors, 30 size_t n); 31 int nfs42_proc_copy_notify(struct file *, struct file *, 32 struct nfs42_copy_notify_res *); 33 static inline bool nfs42_files_from_same_server(struct file *in, 34 struct file *out) 35 { 36 struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client; 37 struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client; 38 39 return nfs4_check_serverowner_major_id(c_in->cl_serverowner, 40 c_out->cl_serverowner); 41 } 42 43 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name, 44 void *buf, size_t buflen); 45 int nfs42_proc_setxattr(struct inode *inode, const char *name, 46 const void *buf, size_t buflen, int flags); 47 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf, 48 size_t buflen, u64 *cookiep, bool *eofp); 49 int nfs42_proc_removexattr(struct inode *inode, const char *name); 50 51 /* 52 * Maximum XDR buffer size needed for a listxattr buffer of buflen size. 53 * 54 * The upper boundary is a buffer with all 1-byte sized attribute names. 55 * They would be 7 bytes long in the eventual buffer ("user.x\0"), and 56 * 8 bytes long XDR-encoded. 57 * 58 * Include the trailing eof word as well and make the result a multiple 59 * of 4 bytes. 60 */ 61 static inline u32 nfs42_listxattr_xdrsize(u32 buflen) 62 { 63 u32 size = 8 * buflen / (XATTR_USER_PREFIX_LEN + 2) + 4; 64 65 return (size + 3) & ~3; 66 } 67 #endif /* CONFIG_NFS_V4_2 */ 68 #endif /* __LINUX_FS_NFS_NFS4_2_H */ 69