Commit | Line | Data |
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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 | ||
24c8dbbb | 30 | /* client.c */ |
54ceac45 DH |
31 | extern struct rpc_program nfs_program; |
32 | ||
24c8dbbb DH |
33 | extern void nfs_put_client(struct nfs_client *); |
34 | extern struct nfs_client *nfs_find_client(const struct sockaddr_in *, int); | |
54ceac45 DH |
35 | extern struct nfs_server *nfs_create_server(const struct nfs_mount_data *, |
36 | struct nfs_fh *); | |
37 | extern struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *, | |
38 | const char *, | |
39 | const struct sockaddr_in *, | |
40 | const char *, | |
41 | const char *, | |
42 | rpc_authflavor_t, | |
43 | struct nfs_fh *); | |
44 | extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, | |
45 | struct nfs_fh *); | |
46 | extern void nfs_free_server(struct nfs_server *server); | |
47 | extern struct nfs_server *nfs_clone_server(struct nfs_server *, | |
48 | struct nfs_fh *, | |
49 | struct nfs_fattr *); | |
24c8dbbb | 50 | |
7d4e2747 | 51 | /* nfs4namespace.c */ |
f7b422b1 DH |
52 | #ifdef CONFIG_NFS_V4 |
53 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); | |
54 | #else | |
55 | static inline | |
56 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) | |
57 | { | |
58 | return ERR_PTR(-ENOENT); | |
59 | } | |
60 | #endif | |
61 | ||
62 | /* callback_xdr.c */ | |
63 | extern struct svc_version nfs4_callback_version1; | |
64 | ||
65 | /* pagelist.c */ | |
66 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 67 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 68 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 69 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 70 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 71 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 DH |
72 | |
73 | #ifdef CONFIG_NFS_DIRECTIO | |
74 | extern int __init nfs_init_directcache(void); | |
266bee88 | 75 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
76 | #else |
77 | #define nfs_init_directcache() (0) | |
78 | #define nfs_destroy_directcache() do {} while(0) | |
79 | #endif | |
80 | ||
81 | /* nfs2xdr.c */ | |
7d4e2747 | 82 | extern int nfs_stat_to_errno(int); |
f7b422b1 DH |
83 | extern struct rpc_procinfo nfs_procedures[]; |
84 | extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); | |
85 | ||
86 | /* nfs3xdr.c */ | |
87 | extern struct rpc_procinfo nfs3_procedures[]; | |
88 | extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); | |
89 | ||
90 | /* nfs4xdr.c */ | |
7d4e2747 | 91 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 92 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
7d4e2747 | 93 | #endif |
f7b422b1 DH |
94 | |
95 | /* nfs4proc.c */ | |
d75d5414 | 96 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
97 | extern struct rpc_procinfo nfs4_procedures[]; |
98 | ||
99 | extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, | |
100 | struct nfs4_fs_locations *fs_locations, | |
101 | struct page *page); | |
d75d5414 | 102 | #endif |
f7b422b1 | 103 | |
979df72e TM |
104 | /* dir.c */ |
105 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); | |
106 | ||
f7b422b1 DH |
107 | /* inode.c */ |
108 | extern struct inode *nfs_alloc_inode(struct super_block *sb); | |
109 | extern void nfs_destroy_inode(struct inode *); | |
110 | extern int nfs_write_inode(struct inode *,int); | |
111 | extern void nfs_clear_inode(struct inode *); | |
112 | #ifdef CONFIG_NFS_V4 | |
113 | extern void nfs4_clear_inode(struct inode *); | |
114 | #endif | |
115 | ||
116 | /* super.c */ | |
54ceac45 | 117 | extern struct file_system_type nfs_xdev_fs_type; |
f7b422b1 | 118 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
119 | extern struct file_system_type nfs4_xdev_fs_type; |
120 | extern struct file_system_type nfs4_referral_fs_type; | |
f7b422b1 | 121 | #endif |
4ebd9ab3 | 122 | |
f7b422b1 | 123 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 124 | |
f7b422b1 DH |
125 | extern int __init register_nfs_fs(void); |
126 | extern void __exit unregister_nfs_fs(void); | |
127 | ||
128 | /* namespace.c */ | |
54ceac45 DH |
129 | extern char *nfs_path(const char *base, |
130 | const struct dentry *droot, | |
131 | const struct dentry *dentry, | |
f7b422b1 DH |
132 | char *buffer, ssize_t buflen); |
133 | ||
54ceac45 DH |
134 | /* getroot.c */ |
135 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); | |
7d4e2747 | 136 | #ifdef CONFIG_NFS_V4 |
54ceac45 DH |
137 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); |
138 | ||
139 | extern int nfs4_path_walk(struct nfs_server *server, | |
140 | struct nfs_fh *mntfh, | |
141 | const char *path); | |
7d4e2747 | 142 | #endif |
f7b422b1 DH |
143 | |
144 | /* | |
145 | * Determine the device name as a string | |
146 | */ | |
147 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
54ceac45 DH |
148 | const struct dentry *dentry, |
149 | char *buffer, ssize_t buflen) | |
f7b422b1 | 150 | { |
54ceac45 DH |
151 | return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, |
152 | dentry, buffer, buflen); | |
f7b422b1 DH |
153 | } |
154 | ||
155 | /* | |
156 | * Determine the actual block size (and log2 thereof) | |
157 | */ | |
158 | static inline | |
159 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
160 | { | |
161 | /* make sure blocksize is a power of two */ | |
162 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
163 | unsigned char nrbits; | |
164 | ||
165 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
166 | ; | |
167 | bsize = 1 << nrbits; | |
168 | if (nrbitsp) | |
169 | *nrbitsp = nrbits; | |
170 | } | |
171 | ||
172 | return bsize; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Calculate the number of 512byte blocks used. | |
177 | */ | |
178 | static inline unsigned long nfs_calc_block_size(u64 tsize) | |
179 | { | |
180 | loff_t used = (tsize + 511) >> 9; | |
181 | return (used > ULONG_MAX) ? ULONG_MAX : used; | |
182 | } | |
183 | ||
184 | /* | |
185 | * Compute and set NFS server blocksize | |
186 | */ | |
187 | static inline | |
188 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
189 | { | |
190 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
191 | bsize = NFS_DEF_FILE_IO_SIZE; | |
192 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
193 | bsize = NFS_MAX_FILE_IO_SIZE; | |
194 | ||
195 | return nfs_block_bits(bsize, nrbitsp); | |
196 | } | |
197 | ||
198 | /* | |
199 | * Determine the maximum file size for a superblock | |
200 | */ | |
201 | static inline | |
202 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
203 | { | |
204 | sb->s_maxbytes = (loff_t)maxfilesize; | |
205 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
206 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
207 | } |