Commit | Line | Data |
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f7b422b1 DH |
1 | /* |
2 | * NFS internal definitions | |
3 | */ | |
4 | ||
5 | #include <linux/mount.h> | |
6 | ||
7 | struct nfs_clone_mount { | |
8 | const struct super_block *sb; | |
9 | const struct dentry *dentry; | |
10 | struct nfs_fh *fh; | |
11 | struct nfs_fattr *fattr; | |
12 | char *hostname; | |
13 | char *mnt_path; | |
14 | struct sockaddr_in *addr; | |
15 | rpc_authflavor_t authflavor; | |
16 | }; | |
17 | ||
7d4e2747 | 18 | /* nfs4namespace.c */ |
f7b422b1 DH |
19 | #ifdef CONFIG_NFS_V4 |
20 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); | |
21 | #else | |
22 | static inline | |
23 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) | |
24 | { | |
25 | return ERR_PTR(-ENOENT); | |
26 | } | |
27 | #endif | |
28 | ||
29 | /* callback_xdr.c */ | |
30 | extern struct svc_version nfs4_callback_version1; | |
31 | ||
32 | /* pagelist.c */ | |
33 | extern int __init nfs_init_nfspagecache(void); | |
266bee88 | 34 | extern void nfs_destroy_nfspagecache(void); |
f7b422b1 | 35 | extern int __init nfs_init_readpagecache(void); |
266bee88 | 36 | extern void nfs_destroy_readpagecache(void); |
f7b422b1 | 37 | extern int __init nfs_init_writepagecache(void); |
266bee88 | 38 | extern void nfs_destroy_writepagecache(void); |
f7b422b1 DH |
39 | |
40 | #ifdef CONFIG_NFS_DIRECTIO | |
41 | extern int __init nfs_init_directcache(void); | |
266bee88 | 42 | extern void nfs_destroy_directcache(void); |
f7b422b1 DH |
43 | #else |
44 | #define nfs_init_directcache() (0) | |
45 | #define nfs_destroy_directcache() do {} while(0) | |
46 | #endif | |
47 | ||
48 | /* nfs2xdr.c */ | |
7d4e2747 | 49 | extern int nfs_stat_to_errno(int); |
f7b422b1 DH |
50 | extern struct rpc_procinfo nfs_procedures[]; |
51 | extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); | |
52 | ||
53 | /* nfs3xdr.c */ | |
54 | extern struct rpc_procinfo nfs3_procedures[]; | |
55 | extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); | |
56 | ||
57 | /* nfs4xdr.c */ | |
7d4e2747 | 58 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 59 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
7d4e2747 | 60 | #endif |
f7b422b1 DH |
61 | |
62 | /* nfs4proc.c */ | |
d75d5414 | 63 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
64 | extern struct rpc_procinfo nfs4_procedures[]; |
65 | ||
66 | extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, | |
67 | struct nfs4_fs_locations *fs_locations, | |
68 | struct page *page); | |
d75d5414 | 69 | #endif |
f7b422b1 | 70 | |
979df72e TM |
71 | /* dir.c */ |
72 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); | |
73 | ||
f7b422b1 DH |
74 | /* inode.c */ |
75 | extern struct inode *nfs_alloc_inode(struct super_block *sb); | |
76 | extern void nfs_destroy_inode(struct inode *); | |
77 | extern int nfs_write_inode(struct inode *,int); | |
78 | extern void nfs_clear_inode(struct inode *); | |
79 | #ifdef CONFIG_NFS_V4 | |
80 | extern void nfs4_clear_inode(struct inode *); | |
81 | #endif | |
82 | ||
83 | /* super.c */ | |
84 | extern struct file_system_type nfs_referral_nfs4_fs_type; | |
85 | extern struct file_system_type clone_nfs_fs_type; | |
86 | #ifdef CONFIG_NFS_V4 | |
87 | extern struct file_system_type clone_nfs4_fs_type; | |
88 | #endif | |
4ebd9ab3 | 89 | |
f7b422b1 | 90 | extern struct rpc_stat nfs_rpcstat; |
4ebd9ab3 | 91 | |
f7b422b1 DH |
92 | extern int __init register_nfs_fs(void); |
93 | extern void __exit unregister_nfs_fs(void); | |
94 | ||
95 | /* namespace.c */ | |
96 | extern char *nfs_path(const char *base, const struct dentry *dentry, | |
97 | char *buffer, ssize_t buflen); | |
98 | ||
99 | /* | |
100 | * Determine the mount path as a string | |
101 | */ | |
7d4e2747 | 102 | #ifdef CONFIG_NFS_V4 |
d75d5414 AM |
103 | static inline char * |
104 | nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) | |
f7b422b1 DH |
105 | { |
106 | return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); | |
107 | } | |
7d4e2747 | 108 | #endif |
f7b422b1 DH |
109 | |
110 | /* | |
111 | * Determine the device name as a string | |
112 | */ | |
113 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
114 | const struct dentry *dentry, | |
115 | char *buffer, ssize_t buflen) | |
116 | { | |
117 | return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); | |
118 | } | |
119 | ||
120 | /* | |
121 | * Determine the actual block size (and log2 thereof) | |
122 | */ | |
123 | static inline | |
124 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
125 | { | |
126 | /* make sure blocksize is a power of two */ | |
127 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
128 | unsigned char nrbits; | |
129 | ||
130 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
131 | ; | |
132 | bsize = 1 << nrbits; | |
133 | if (nrbitsp) | |
134 | *nrbitsp = nrbits; | |
135 | } | |
136 | ||
137 | return bsize; | |
138 | } | |
139 | ||
140 | /* | |
141 | * Calculate the number of 512byte blocks used. | |
142 | */ | |
143 | static inline unsigned long nfs_calc_block_size(u64 tsize) | |
144 | { | |
145 | loff_t used = (tsize + 511) >> 9; | |
146 | return (used > ULONG_MAX) ? ULONG_MAX : used; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Compute and set NFS server blocksize | |
151 | */ | |
152 | static inline | |
153 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
154 | { | |
155 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
156 | bsize = NFS_DEF_FILE_IO_SIZE; | |
157 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
158 | bsize = NFS_MAX_FILE_IO_SIZE; | |
159 | ||
160 | return nfs_block_bits(bsize, nrbitsp); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Determine the maximum file size for a superblock | |
165 | */ | |
166 | static inline | |
167 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
168 | { | |
169 | sb->s_maxbytes = (loff_t)maxfilesize; | |
170 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
171 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Check if the string represents a "valid" IPv4 address | |
176 | */ | |
177 | static inline int valid_ipaddr4(const char *buf) | |
178 | { | |
179 | int rc, count, in[4]; | |
180 | ||
181 | rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]); | |
182 | if (rc != 4) | |
183 | return -EINVAL; | |
184 | for (count = 0; count < 4; count++) { | |
185 | if (in[count] > 255) | |
186 | return -EINVAL; | |
187 | } | |
188 | return 0; | |
189 | } |