David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 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); |
| 34 | extern void __exit nfs_destroy_nfspagecache(void); |
| 35 | extern int __init nfs_init_readpagecache(void); |
| 36 | extern void __exit nfs_destroy_readpagecache(void); |
| 37 | extern int __init nfs_init_writepagecache(void); |
| 38 | extern void __exit nfs_destroy_writepagecache(void); |
| 39 | |
| 40 | #ifdef CONFIG_NFS_DIRECTIO |
| 41 | extern int __init nfs_init_directcache(void); |
| 42 | extern void __exit nfs_destroy_directcache(void); |
| 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 */ |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 61 | #ifdef CONFIG_NFS_V4 |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 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); |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 67 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 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 | */ |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 97 | static inline char * |
| 98 | nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 99 | { |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 100 | #ifdef CONFIG_NFS_V4 |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 101 | return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 102 | #else |
| 103 | return NULL; |
| 104 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 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 | } |