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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 | ||
18 | /* namespace-nfs4.c */ | |
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 */ | |
49 | extern struct rpc_procinfo nfs_procedures[]; | |
50 | extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); | |
51 | ||
52 | /* nfs3xdr.c */ | |
53 | extern struct rpc_procinfo nfs3_procedures[]; | |
54 | extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); | |
55 | ||
56 | /* nfs4xdr.c */ | |
57 | extern int nfs_stat_to_errno(int); | |
58 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); | |
59 | ||
60 | /* nfs4proc.c */ | |
d75d5414 | 61 | #ifdef CONFIG_NFS_V4 |
f7b422b1 DH |
62 | extern struct rpc_procinfo nfs4_procedures[]; |
63 | ||
64 | extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, | |
65 | struct nfs4_fs_locations *fs_locations, | |
66 | struct page *page); | |
d75d5414 | 67 | #endif |
f7b422b1 DH |
68 | |
69 | /* inode.c */ | |
70 | extern struct inode *nfs_alloc_inode(struct super_block *sb); | |
71 | extern void nfs_destroy_inode(struct inode *); | |
72 | extern int nfs_write_inode(struct inode *,int); | |
73 | extern void nfs_clear_inode(struct inode *); | |
74 | #ifdef CONFIG_NFS_V4 | |
75 | extern void nfs4_clear_inode(struct inode *); | |
76 | #endif | |
77 | ||
78 | /* super.c */ | |
79 | extern struct file_system_type nfs_referral_nfs4_fs_type; | |
80 | extern struct file_system_type clone_nfs_fs_type; | |
81 | #ifdef CONFIG_NFS_V4 | |
82 | extern struct file_system_type clone_nfs4_fs_type; | |
83 | #endif | |
84 | #ifdef CONFIG_PROC_FS | |
85 | extern struct rpc_stat nfs_rpcstat; | |
86 | #endif | |
87 | extern int __init register_nfs_fs(void); | |
88 | extern void __exit unregister_nfs_fs(void); | |
89 | ||
90 | /* namespace.c */ | |
91 | extern char *nfs_path(const char *base, const struct dentry *dentry, | |
92 | char *buffer, ssize_t buflen); | |
93 | ||
94 | /* | |
95 | * Determine the mount path as a string | |
96 | */ | |
d75d5414 AM |
97 | static inline char * |
98 | nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) | |
f7b422b1 | 99 | { |
d75d5414 | 100 | #ifdef CONFIG_NFS_V4 |
f7b422b1 | 101 | return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); |
d75d5414 AM |
102 | #else |
103 | return NULL; | |
104 | #endif | |
f7b422b1 DH |
105 | } |
106 | ||
107 | /* | |
108 | * Determine the device name as a string | |
109 | */ | |
110 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, | |
111 | const struct dentry *dentry, | |
112 | char *buffer, ssize_t buflen) | |
113 | { | |
114 | return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Determine the actual block size (and log2 thereof) | |
119 | */ | |
120 | static inline | |
121 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
122 | { | |
123 | /* make sure blocksize is a power of two */ | |
124 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
125 | unsigned char nrbits; | |
126 | ||
127 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
128 | ; | |
129 | bsize = 1 << nrbits; | |
130 | if (nrbitsp) | |
131 | *nrbitsp = nrbits; | |
132 | } | |
133 | ||
134 | return bsize; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Calculate the number of 512byte blocks used. | |
139 | */ | |
140 | static inline unsigned long nfs_calc_block_size(u64 tsize) | |
141 | { | |
142 | loff_t used = (tsize + 511) >> 9; | |
143 | return (used > ULONG_MAX) ? ULONG_MAX : used; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Compute and set NFS server blocksize | |
148 | */ | |
149 | static inline | |
150 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
151 | { | |
152 | if (bsize < NFS_MIN_FILE_IO_SIZE) | |
153 | bsize = NFS_DEF_FILE_IO_SIZE; | |
154 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
155 | bsize = NFS_MAX_FILE_IO_SIZE; | |
156 | ||
157 | return nfs_block_bits(bsize, nrbitsp); | |
158 | } | |
159 | ||
160 | /* | |
161 | * Determine the maximum file size for a superblock | |
162 | */ | |
163 | static inline | |
164 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
165 | { | |
166 | sb->s_maxbytes = (loff_t)maxfilesize; | |
167 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
168 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Check if the string represents a "valid" IPv4 address | |
173 | */ | |
174 | static inline int valid_ipaddr4(const char *buf) | |
175 | { | |
176 | int rc, count, in[4]; | |
177 | ||
178 | rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]); | |
179 | if (rc != 4) | |
180 | return -EINVAL; | |
181 | for (count = 0; count < 4; count++) { | |
182 | if (in[count] > 255) | |
183 | return -EINVAL; | |
184 | } | |
185 | return 0; | |
186 | } |