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 19 int nfs42_proc_allocate(struct file *, loff_t, loff_t); 20 ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t, 21 struct nl4_server *, nfs4_stateid *, bool); 22 int nfs42_proc_deallocate(struct file *, loff_t, loff_t); 23 loff_t nfs42_proc_llseek(struct file *, loff_t, int); 24 int nfs42_proc_layoutstats_generic(struct nfs_server *, 25 struct nfs42_layoutstat_data *); 26 int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t); 27 int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg, 28 const struct nfs42_layout_error *errors, 29 size_t n); 30 int nfs42_proc_copy_notify(struct file *, struct file *, 31 struct nfs42_copy_notify_res *); 32 static 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 42 ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name, 43 void *buf, size_t buflen); 44 int nfs42_proc_setxattr(struct inode *inode, const char *name, 45 const void *buf, size_t buflen, int flags); 46 ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf, 47 size_t buflen, u64 *cookiep, bool *eofp); 48 int 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 */ 59 static 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