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(inode: file_inode(f: in)))->nfs_client; |
37 | struct nfs_client *c_out = (NFS_SERVER(inode: file_inode(f: out)))->nfs_client; |
38 | |
39 | return nfs4_check_serverowner_major_id(o1: c_in->cl_serverowner, |
40 | o2: 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. |
59 | */ |
60 | static inline u32 nfs42_listxattr_xdrsize(u32 buflen) |
61 | { |
62 | return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4; |
63 | } |
64 | #endif /* CONFIG_NFS_V4_2 */ |
65 | #endif /* __LINUX_FS_NFS_NFS4_2_H */ |
66 | |