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 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 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 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 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 | |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 30 | /* client.c */ |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 31 | extern struct rpc_program nfs_program; |
| 32 | |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 33 | extern void nfs_put_client(struct nfs_client *); |
| 34 | extern struct nfs_client *nfs_find_client(const struct sockaddr_in *, int); |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 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 *); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame^] | 50 | #ifdef CONFIG_PROC_FS |
| 51 | extern int __init nfs_fs_proc_init(void); |
| 52 | extern void nfs_fs_proc_exit(void); |
| 53 | #else |
| 54 | static inline int nfs_fs_proc_init(void) |
| 55 | { |
| 56 | return 0; |
| 57 | } |
| 58 | static inline void nfs_fs_proc_exit(void) |
| 59 | { |
| 60 | } |
| 61 | #endif |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 62 | |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 63 | /* nfs4namespace.c */ |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 64 | #ifdef CONFIG_NFS_V4 |
| 65 | extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); |
| 66 | #else |
| 67 | static inline |
| 68 | struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) |
| 69 | { |
| 70 | return ERR_PTR(-ENOENT); |
| 71 | } |
| 72 | #endif |
| 73 | |
| 74 | /* callback_xdr.c */ |
| 75 | extern struct svc_version nfs4_callback_version1; |
| 76 | |
| 77 | /* pagelist.c */ |
| 78 | extern int __init nfs_init_nfspagecache(void); |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 79 | extern void nfs_destroy_nfspagecache(void); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 80 | extern int __init nfs_init_readpagecache(void); |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 81 | extern void nfs_destroy_readpagecache(void); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 82 | extern int __init nfs_init_writepagecache(void); |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 83 | extern void nfs_destroy_writepagecache(void); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 84 | |
| 85 | #ifdef CONFIG_NFS_DIRECTIO |
| 86 | extern int __init nfs_init_directcache(void); |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 87 | extern void nfs_destroy_directcache(void); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 88 | #else |
| 89 | #define nfs_init_directcache() (0) |
| 90 | #define nfs_destroy_directcache() do {} while(0) |
| 91 | #endif |
| 92 | |
| 93 | /* nfs2xdr.c */ |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 94 | extern int nfs_stat_to_errno(int); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 95 | extern struct rpc_procinfo nfs_procedures[]; |
| 96 | extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int); |
| 97 | |
| 98 | /* nfs3xdr.c */ |
| 99 | extern struct rpc_procinfo nfs3_procedures[]; |
| 100 | extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); |
| 101 | |
| 102 | /* nfs4xdr.c */ |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 103 | #ifdef CONFIG_NFS_V4 |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 104 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 105 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 106 | |
| 107 | /* nfs4proc.c */ |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 108 | #ifdef CONFIG_NFS_V4 |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 109 | extern struct rpc_procinfo nfs4_procedures[]; |
| 110 | |
| 111 | extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, |
| 112 | struct nfs4_fs_locations *fs_locations, |
| 113 | struct page *page); |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 114 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 115 | |
Trond Myklebust | 979df72 | 2006-07-25 11:28:19 -0400 | [diff] [blame] | 116 | /* dir.c */ |
| 117 | extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask); |
| 118 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 119 | /* inode.c */ |
| 120 | extern struct inode *nfs_alloc_inode(struct super_block *sb); |
| 121 | extern void nfs_destroy_inode(struct inode *); |
| 122 | extern int nfs_write_inode(struct inode *,int); |
| 123 | extern void nfs_clear_inode(struct inode *); |
| 124 | #ifdef CONFIG_NFS_V4 |
| 125 | extern void nfs4_clear_inode(struct inode *); |
| 126 | #endif |
| 127 | |
| 128 | /* super.c */ |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 129 | extern struct file_system_type nfs_xdev_fs_type; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 130 | #ifdef CONFIG_NFS_V4 |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 131 | extern struct file_system_type nfs4_xdev_fs_type; |
| 132 | extern struct file_system_type nfs4_referral_fs_type; |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 133 | #endif |
Dominik Hackl | 4ebd9ab | 2006-07-02 17:29:26 +0200 | [diff] [blame] | 134 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 135 | extern struct rpc_stat nfs_rpcstat; |
Dominik Hackl | 4ebd9ab | 2006-07-02 17:29:26 +0200 | [diff] [blame] | 136 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 137 | extern int __init register_nfs_fs(void); |
| 138 | extern void __exit unregister_nfs_fs(void); |
| 139 | |
| 140 | /* namespace.c */ |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 141 | extern char *nfs_path(const char *base, |
| 142 | const struct dentry *droot, |
| 143 | const struct dentry *dentry, |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 144 | char *buffer, ssize_t buflen); |
| 145 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 146 | /* getroot.c */ |
| 147 | extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 148 | #ifdef CONFIG_NFS_V4 |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 149 | extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); |
| 150 | |
| 151 | extern int nfs4_path_walk(struct nfs_server *server, |
| 152 | struct nfs_fh *mntfh, |
| 153 | const char *path); |
David Howells | 7d4e274 | 2006-08-22 20:06:07 -0400 | [diff] [blame] | 154 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 155 | |
| 156 | /* |
| 157 | * Determine the device name as a string |
| 158 | */ |
| 159 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 160 | const struct dentry *dentry, |
| 161 | char *buffer, ssize_t buflen) |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 162 | { |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 163 | return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, |
| 164 | dentry, buffer, buflen); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Determine the actual block size (and log2 thereof) |
| 169 | */ |
| 170 | static inline |
| 171 | unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) |
| 172 | { |
| 173 | /* make sure blocksize is a power of two */ |
| 174 | if ((bsize & (bsize - 1)) || nrbitsp) { |
| 175 | unsigned char nrbits; |
| 176 | |
| 177 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) |
| 178 | ; |
| 179 | bsize = 1 << nrbits; |
| 180 | if (nrbitsp) |
| 181 | *nrbitsp = nrbits; |
| 182 | } |
| 183 | |
| 184 | return bsize; |
| 185 | } |
| 186 | |
| 187 | /* |
| 188 | * Calculate the number of 512byte blocks used. |
| 189 | */ |
| 190 | static inline unsigned long nfs_calc_block_size(u64 tsize) |
| 191 | { |
| 192 | loff_t used = (tsize + 511) >> 9; |
| 193 | return (used > ULONG_MAX) ? ULONG_MAX : used; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * Compute and set NFS server blocksize |
| 198 | */ |
| 199 | static inline |
| 200 | unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) |
| 201 | { |
| 202 | if (bsize < NFS_MIN_FILE_IO_SIZE) |
| 203 | bsize = NFS_DEF_FILE_IO_SIZE; |
| 204 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) |
| 205 | bsize = NFS_MAX_FILE_IO_SIZE; |
| 206 | |
| 207 | return nfs_block_bits(bsize, nrbitsp); |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | * Determine the maximum file size for a superblock |
| 212 | */ |
| 213 | static inline |
| 214 | void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) |
| 215 | { |
| 216 | sb->s_maxbytes = (loff_t)maxfilesize; |
| 217 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) |
| 218 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 219 | } |