Commit | Line | Data |
---|---|---|
f7b422b1 DH |
1 | /* |
2 | * NFS internal definitions | |
3 | */ | |
4 | ||
5 | #include <linux/mount.h> | |
6 | ||
54ceac45 DH |
7 | struct nfs_string; |
8 | struct nfs_mount_data; | |
9 | struct nfs4_mount_data; | |
10 | ||
11 | /* Maximum number of readahead requests | |
12 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
13 | * their needs. People that do NFS over a slow network, might for | |
14 | * instance want to reduce it to something closer to 1 for improved | |
15 | * interactive response. | |
16 | */ | |
17 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
18 | ||
f7b422b1 DH |
19 | struct nfs_clone_mount { |
20 | const struct super_block *sb; | |
21 | const struct dentry *dentry; | |
22 | struct nfs_fh *fh; | |
23 | struct nfs_fattr *fattr; | |
24 | char *hostname; | |
25 | char *mnt_path; | |
26 | struct sockaddr_in *addr; | |
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 { | |
46 | struct sockaddr_in address; | |
47 | char *hostname; | |
48 | unsigned int program; | |
49 | unsigned int version; | |
50 | unsigned short port; | |
51 | int protocol; | |
52 | } mount_server; | |
53 | ||
54 | struct { | |
55 | struct sockaddr_in address; | |
56 | char *hostname; | |
57 | char *export_path; | |
58 | unsigned int program; | |
59 | int protocol; | |
60 | } nfs_server; | |
61 | }; | |
62 | ||
24c8dbbb | 63 | /* client.c */ |
54ceac45 DH |
64 | extern struct rpc_program nfs_program; |
65 | ||
24c8dbbb DH |
66 | extern void nfs_put_client(struct nfs_client *); |
67 | extern struct nfs_client *nfs_find_client(const struct sockaddr_in *, int); | |
54ceac45 DH |
68 | extern struct nfs_server *nfs_create_server(const struct nfs_mount_data *, |
69 | struct nfs_fh *); | |
70 | extern struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *, | |
71 | const char *, | |
72 | const struct sockaddr_in *, | |
73 | const char *, | |
74 | const char *, | |
75 | rpc_authflavor_t, | |
76 | struct nfs_fh *); | |
77 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, | |
78 | struct nfs_fh *); | |
79 | extern void nfs_free_server(struct nfs_server *server); | |
80 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
81 | struct nfs_fh *, | |
82 | struct nfs_fattr *); | |
6aaca566 DH |
83 | #ifdef CONFIG_PROC_FS |
84 | extern int __init nfs_fs_proc_init(void); | |
85 | extern void nfs_fs_proc_exit(void); | |
86 | #else | |
87 | static inline int nfs_fs_proc_init(void) | |
88 | { | |
89 | return 0; | |
90 | } | |
91 | static inline void nfs_fs_proc_exit(void) | |
92 | { | |
93 | } | |
94 | #endif | |
24c8dbbb | 95 | |
7d4e2747 | 96 | /* nfs4namespace.c */ |
f7b422b1 DH |
97 | #ifdef CONFIG_NFS_V4 |
98 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); | |
99 | #else | |
100 | static inline | |
101 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) | |
102 | { | |
103 | return ERR_PTR(-ENOENT); | |
104 | } | |
105 | #endif | |
106 | ||
107 | /* callback_xdr.c */ | |
108 | extern struct svc_version nfs4_callback_version1; | |
109 | ||
110 | /* pagelist.c */ | |
111 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 112 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 113 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 114 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 115 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 116 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 DH |
117 | |
118 | #ifdef CONFIG_NFS_DIRECTIO | |
119 | extern int __init nfs_init_directcache(void); | |
266bee88 | 120 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
121 | #else |
122 | #define nfs_init_directcache() (0) | |
123 | #define nfs_destroy_directcache() do {} while(0) | |
124 | #endif | |
125 | ||
126 | /* nfs2xdr.c */ | |
7d4e2747 | 127 | extern int nfs_stat_to_errno(int); |
f7b422b1 | 128 | extern struct rpc_procinfo nfs_procedures[]; |
0dbb4c67 | 129 | extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 DH |
130 | |
131 | /* nfs3xdr.c */ | |
132 | extern struct rpc_procinfo nfs3_procedures[]; | |
0dbb4c67 | 133 | extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int); |
f7b422b1 DH |
134 | |
135 | /* nfs4xdr.c */ | |
7d4e2747 | 136 | #ifdef CONFIG_NFS_V4 |
0dbb4c67 | 137 | extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus); |
7d4e2747 | 138 | #endif |
f7b422b1 DH |
139 | |
140 | /* nfs4proc.c */ | |
d75d5414 | 141 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 142 | extern struct rpc_procinfo nfs4_procedures[]; |
d75d5414 | 143 | #endif |
f7b422b1 | 144 | |
979df72e TM |
145 | /* dir.c */ |
146 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); | |
147 | ||
f7b422b1 DH |
148 | /* inode.c */ |
149 | extern struct inode *nfs_alloc_inode(struct super_block *sb); | |
150 | extern void nfs_destroy_inode(struct inode *); | |
151 | extern int nfs_write_inode(struct inode *,int); | |
152 | extern void nfs_clear_inode(struct inode *); | |
153 | #ifdef CONFIG_NFS_V4 | |
154 | extern void nfs4_clear_inode(struct inode *); | |
155 | #endif | |
156 | ||
157 | /* super.c */ | |
54ceac45 | 158 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 159 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
160 | extern struct file_system_type nfs4_xdev_fs_type; |
161 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 162 | #endif |
4ebd9ab3 | 163 | |
f7b422b1 | 164 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 165 | |
f7b422b1 DH |
166 | extern int __init register_nfs_fs(void); |
167 | extern void __exit unregister_nfs_fs(void); | |
168 | ||
169 | /* namespace.c */ | |
54ceac45 DH |
170 | extern char *nfs_path(const char *base, |
171 | const struct dentry *droot, | |
172 | const struct dentry *dentry, | |
f7b422b1 DH |
173 | char *buffer, ssize_t buflen); |
174 | ||
54ceac45 DH |
175 | /* getroot.c */ |
176 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); | |
7d4e2747 | 177 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
178 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); |
179 | ||
180 | extern int nfs4_path_walk(struct nfs_server *server, | |
181 | struct nfs_fh *mntfh, | |
182 | const char *path); | |
7d4e2747 | 183 | #endif |
f7b422b1 DH |
184 | |
185 | /* | |
186 | * Determine the device name as a string | |
187 | */ | |
188 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
54ceac45 DH |
189 | const struct dentry *dentry, |
190 | char *buffer, ssize_t buflen) | |
f7b422b1 | 191 | { |
54ceac45 DH |
192 | return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, |
193 | dentry, buffer, buflen); | |
f7b422b1 DH |
194 | } |
195 | ||
196 | /* | |
197 | * Determine the actual block size (and log2 thereof) | |
198 | */ | |
199 | static inline | |
200 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
201 | { | |
202 | /* make sure blocksize is a power of two */ | |
203 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
204 | unsigned char nrbits; | |
205 | ||
206 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
207 | ; | |
208 | bsize = 1 << nrbits; | |
209 | if (nrbitsp) | |
210 | *nrbitsp = nrbits; | |
211 | } | |
212 | ||
213 | return bsize; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Calculate the number of 512byte blocks used. | |
218 | */ | |
9eaa67c6 | 219 | static inline blkcnt_t nfs_calc_block_size(u64 tsize) |
f7b422b1 | 220 | { |
9eaa67c6 | 221 | blkcnt_t used = (tsize + 511) >> 9; |
f7b422b1 DH |
222 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
223 | } | |
224 | ||
225 | /* | |
226 | * Compute and set NFS server blocksize | |
227 | */ | |
228 | static inline | |
229 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
230 | { | |
231 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
232 | bsize = NFS_DEF_FILE_IO_SIZE; | |
233 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
234 | bsize = NFS_MAX_FILE_IO_SIZE; | |
235 | ||
236 | return nfs_block_bits(bsize, nrbitsp); | |
237 | } | |
238 | ||
239 | /* | |
240 | * Determine the maximum file size for a superblock | |
241 | */ | |
242 | static inline | |
243 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
244 | { | |
245 | sb->s_maxbytes = (loff_t)maxfilesize; | |
246 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
247 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
248 | } | |
49a70f27 TM |
249 | |
250 | /* | |
251 | * Determine the number of bytes of data the page contains | |
252 | */ | |
253 | static inline | |
254 | unsigned int nfs_page_length(struct page *page) | |
255 | { | |
256 | loff_t i_size = i_size_read(page->mapping->host); | |
257 | ||
258 | if (i_size > 0) { | |
259 | pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; | |
260 | if (page->index < end_index) | |
261 | return PAGE_CACHE_SIZE; | |
262 | if (page->index == end_index) | |
263 | return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; | |
264 | } | |
265 | return 0; | |
266 | } | |
8d5658c9 TM |
267 | |
268 | /* | |
269 | * Determine the number of pages in an array of length 'len' and | |
270 | * with a base offset of 'base' | |
271 | */ | |
272 | static inline | |
273 | unsigned int nfs_page_array_len(unsigned int base, size_t len) | |
274 | { | |
275 | return ((unsigned long)len + (unsigned long)base + | |
276 | PAGE_SIZE - 1) >> PAGE_SHIFT; | |
277 | } | |
278 |