Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * NFS internal definitions | |
3 | */ | |
4 | ||
5 | #include <linux/mount.h> | |
f9c3a380 | 6 | #include <linux/security.h> |
f7b422b1 | 7 | |
54ceac45 | 8 | struct nfs_string; |
54ceac45 DH |
9 | |
10 | /* Maximum number of readahead requests | |
11 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
12 | * their needs. People that do NFS over a slow network, might for | |
13 | * instance want to reduce it to something closer to 1 for improved | |
14 | * interactive response. | |
15 | */ | |
16 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
17 | ||
f7b422b1 DH |
18 | struct nfs_clone_mount { |
19 | const struct super_block *sb; | |
20 | const struct dentry *dentry; | |
21 | struct nfs_fh *fh; | |
22 | struct nfs_fattr *fattr; | |
23 | char *hostname; | |
24 | char *mnt_path; | |
6677d095 CL |
25 | struct sockaddr *addr; |
26 | size_t addrlen; | |
f7b422b1 DH |
27 | rpc_authflavor_t authflavor; |
28 | }; | |
29 | ||
6b18eaa0 TT |
30 | /* |
31 | * In-kernel mount arguments | |
32 | */ | |
33 | struct nfs_parsed_mount_data { | |
34 | int flags; | |
35 | int rsize, wsize; | |
36 | int timeo, retrans; | |
37 | int acregmin, acregmax, | |
38 | acdirmin, acdirmax; | |
39 | int namlen; | |
40 | unsigned int bsize; | |
41 | unsigned int auth_flavor_len; | |
42 | rpc_authflavor_t auth_flavors[1]; | |
43 | char *client_address; | |
44 | ||
45 | struct { | |
4c568017 CL |
46 | struct sockaddr_storage address; |
47 | size_t addrlen; | |
6b18eaa0 | 48 | char *hostname; |
78fa701f | 49 | u32 version; |
6b18eaa0 | 50 | unsigned short port; |
78fa701f | 51 | unsigned short protocol; |
6b18eaa0 TT |
52 | } mount_server; |
53 | ||
54 | struct { | |
4c568017 CL |
55 | struct sockaddr_storage address; |
56 | size_t addrlen; | |
6b18eaa0 TT |
57 | char *hostname; |
58 | char *export_path; | |
f22d6d79 | 59 | unsigned short port; |
78fa701f | 60 | unsigned short protocol; |
6b18eaa0 | 61 | } nfs_server; |
f9c3a380 EP |
62 | |
63 | struct security_mnt_opts lsm_opts; | |
6b18eaa0 TT |
64 | }; |
65 | ||
24c8dbbb | 66 | /* client.c */ |
54ceac45 DH |
67 | extern struct rpc_program nfs_program; |
68 | ||
24c8dbbb | 69 | extern void nfs_put_client(struct nfs_client *); |
ff052645 | 70 | extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32); |
3fbd67ad | 71 | extern struct nfs_client *nfs_find_client_next(struct nfs_client *); |
2283f8d6 TT |
72 | extern struct nfs_server *nfs_create_server( |
73 | const struct nfs_parsed_mount_data *, | |
74 | struct nfs_fh *); | |
91ea40b9 TT |
75 | extern struct nfs_server *nfs4_create_server( |
76 | const struct nfs_parsed_mount_data *, | |
77 | struct nfs_fh *); | |
54ceac45 DH |
78 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, |
79 | struct nfs_fh *); | |
80 | extern void nfs_free_server(struct nfs_server *server); | |
81 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
82 | struct nfs_fh *, | |
83 | struct nfs_fattr *); | |
6aaca566 DH |
84 | #ifdef CONFIG_PROC_FS |
85 | extern int __init nfs_fs_proc_init(void); | |
86 | extern void nfs_fs_proc_exit(void); | |
87 | #else | |
88 | static inline int nfs_fs_proc_init(void) | |
89 | { | |
90 | return 0; | |
91 | } | |
92 | static inline void nfs_fs_proc_exit(void) | |
93 | { | |
94 | } | |
95 | #endif | |
24c8dbbb | 96 | |
7d4e2747 | 97 | /* nfs4namespace.c */ |
f7b422b1 DH |
98 | #ifdef CONFIG_NFS_V4 |
99 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); | |
100 | #else | |
101 | static inline | |
102 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) | |
103 | { | |
104 | return ERR_PTR(-ENOENT); | |
105 | } | |
106 | #endif | |
107 | ||
108 | /* callback_xdr.c */ | |
109 | extern struct svc_version nfs4_callback_version1; | |
110 | ||
111 | /* pagelist.c */ | |
112 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 113 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 114 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 115 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 116 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 117 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 | 118 | |
f7b422b1 | 119 | extern int __init nfs_init_directcache(void); |
266bee88 | 120 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
121 | |
122 | /* nfs2xdr.c */ | |
7d4e2747 | 123 | extern int nfs_stat_to_errno(int); |
f7b422b1 | 124 | extern struct rpc_procinfo nfs_procedures[]; |
0dbb4c67 | 125 | extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 DH |
126 | |
127 | /* nfs3xdr.c */ | |
128 | extern struct rpc_procinfo nfs3_procedures[]; | |
0dbb4c67 | 129 | extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 DH |
130 | |
131 | /* nfs4xdr.c */ | |
7d4e2747 | 132 | #ifdef CONFIG_NFS_V4 |
0dbb4c67 | 133 | extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus); |
7d4e2747 | 134 | #endif |
f7b422b1 DH |
135 | |
136 | /* nfs4proc.c */ | |
d75d5414 | 137 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 138 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 139 | #endif |
f7b422b1 | 140 | |
979df72e TM |
141 | /* dir.c */ |
142 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); | |
143 | ||
f7b422b1 | 144 | /* inode.c */ |
5746006f | 145 | extern struct workqueue_struct *nfsiod_workqueue; |
f7b422b1 DH |
146 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
147 | extern void nfs_destroy_inode(struct inode *); | |
148 | extern int nfs_write_inode(struct inode *,int); | |
149 | extern void nfs_clear_inode(struct inode *); | |
150 | #ifdef CONFIG_NFS_V4 | |
151 | extern void nfs4_clear_inode(struct inode *); | |
152 | #endif | |
153 | ||
154 | /* super.c */ | |
54ceac45 | 155 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 156 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
157 | extern struct file_system_type nfs4_xdev_fs_type; |
158 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 159 | #endif |
4ebd9ab3 | 160 | |
f7b422b1 | 161 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 162 | |
f7b422b1 DH |
163 | extern int __init register_nfs_fs(void); |
164 | extern void __exit unregister_nfs_fs(void); | |
ef818a28 SD |
165 | extern void nfs_sb_active(struct nfs_server *server); |
166 | extern void nfs_sb_deactive(struct nfs_server *server); | |
f7b422b1 DH |
167 | |
168 | /* namespace.c */ | |
54ceac45 DH |
169 | extern char *nfs_path(const char *base, |
170 | const struct dentry *droot, | |
171 | const struct dentry *dentry, | |
f7b422b1 DH |
172 | char *buffer, ssize_t buflen); |
173 | ||
54ceac45 DH |
174 | /* getroot.c */ |
175 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); | |
7d4e2747 | 176 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
177 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); |
178 | ||
179 | extern int nfs4_path_walk(struct nfs_server *server, | |
180 | struct nfs_fh *mntfh, | |
181 | const char *path); | |
7d4e2747 | 182 | #endif |
f7b422b1 DH |
183 | |
184 | /* | |
185 | * Determine the device name as a string | |
186 | */ | |
187 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
54ceac45 DH |
188 | const struct dentry *dentry, |
189 | char *buffer, ssize_t buflen) | |
f7b422b1 | 190 | { |
54ceac45 DH |
191 | return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, |
192 | dentry, buffer, buflen); | |
f7b422b1 DH |
193 | } |
194 | ||
195 | /* | |
196 | * Determine the actual block size (and log2 thereof) | |
197 | */ | |
198 | static inline | |
199 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
200 | { | |
201 | /* make sure blocksize is a power of two */ | |
202 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
203 | unsigned char nrbits; | |
204 | ||
205 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
206 | ; | |
207 | bsize = 1 << nrbits; | |
208 | if (nrbitsp) | |
209 | *nrbitsp = nrbits; | |
210 | } | |
211 | ||
212 | return bsize; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Calculate the number of 512byte blocks used. | |
217 | */ | |
9eaa67c6 | 218 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 219 | { |
9eaa67c6 | 220 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
221 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
222 | } | |
223 | ||
224 | /* | |
225 | * Compute and set NFS server blocksize | |
226 | */ | |
227 | static inline | |
228 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
229 | { | |
230 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
231 | bsize = NFS_DEF_FILE_IO_SIZE; | |
232 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
233 | bsize = NFS_MAX_FILE_IO_SIZE; | |
234 | ||
235 | return nfs_block_bits(bsize, nrbitsp); | |
236 | } | |
237 | ||
238 | /* | |
239 | * Determine the maximum file size for a superblock | |
240 | */ | |
241 | static inline | |
242 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
243 | { | |
244 | sb->s_maxbytes = (loff_t)maxfilesize; | |
245 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
246 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
247 | } | |
49a70f27 TM |
248 | |
249 | /* | |
250 | * Determine the number of bytes of data the page contains | |
251 | */ | |
252 | static inline | |
253 | unsigned int nfs_page_length(struct page *page) | |
254 | { | |
255 | loff_t i_size = i_size_read(page->mapping->host); | |
256 | ||
257 | if (i_size > 0) { | |
258 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
259 | if (page->index < end_index) | |
260 | return PAGE_CACHE_SIZE; | |
261 | if (page->index == end_index) | |
262 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; | |
263 | } | |
264 | return 0; | |
265 | } | |
8d5658c9 TM |
266 | |
267 | /* | |
268 | * Determine the number of pages in an array of length 'len' and | |
269 | * with a base offset of 'base' | |
270 | */ | |
271 | static inline | |
272 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
273 | { | |
274 | return ((unsigned long)len + (unsigned long)base + | |
275 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
276 | } | |
277 |