1 files changed, 179 insertions, 0 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
new file mode 100644
index 000000000000..5e51c4535b6f
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,179 @@
+/*
+ * NFS internal definitions
+ */
+
+#include <linux/mount.h>
+
+struct nfs_clone_mount {
+        const struct super_block *sb;
+        const struct dentry *dentry;
+        struct nfs_fh *fh;
+        struct nfs_fattr *fattr;
+        char *hostname;
+        char *mnt_path;
+        struct sockaddr_in *addr;
+        rpc_authflavor_t authflavor;
+};
+
+/* namespace-nfs4.c */
+#ifdef CONFIG_NFS_V4
+extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
+#else
+static inline
+struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+{
+        return ERR_PTR(-ENOENT);
+}
+#endif
+
+/* callback_xdr.c */
+extern struct svc_version nfs4_callback_version1;
+
+/* pagelist.c */
+extern int __init nfs_init_nfspagecache(void);
+extern void __exit nfs_destroy_nfspagecache(void);
+extern int __init nfs_init_readpagecache(void);
+extern void __exit nfs_destroy_readpagecache(void);
+extern int __init nfs_init_writepagecache(void);
+extern void __exit nfs_destroy_writepagecache(void);
+
+#ifdef CONFIG_NFS_DIRECTIO
+extern int __init nfs_init_directcache(void);
+extern void __exit nfs_destroy_directcache(void);
+#else
+#define nfs_init_directcache() (0)
+#define nfs_destroy_directcache() do {} while(0)
+#endif
+
+/* nfs2xdr.c */
+extern struct rpc_procinfo nfs_procedures[];
+extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
+
+/* nfs3xdr.c */
+extern struct rpc_procinfo nfs3_procedures[];
+extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
+
+/* nfs4xdr.c */
+extern int nfs_stat_to_errno(int);
+extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
+
+/* nfs4proc.c */
+extern struct rpc_procinfo nfs4_procedures[];
+
+extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
+                                  struct nfs4_fs_locations *fs_locations,
+                                  struct page *page);
+
+/* inode.c */
+extern struct inode *nfs_alloc_inode(struct super_block *sb);
+extern void nfs_destroy_inode(struct inode *);
+extern int nfs_write_inode(struct inode *,int);
+extern void nfs_clear_inode(struct inode *);
+#ifdef CONFIG_NFS_V4
+extern void nfs4_clear_inode(struct inode *);
+#endif
+
+/* super.c */
+extern struct file_system_type nfs_referral_nfs4_fs_type;
+extern struct file_system_type clone_nfs_fs_type;
+#ifdef CONFIG_NFS_V4
+extern struct file_system_type clone_nfs4_fs_type;
+#endif
+#ifdef CONFIG_PROC_FS
+extern struct rpc_stat nfs_rpcstat;
+#endif
+extern int __init register_nfs_fs(void);
+extern void __exit unregister_nfs_fs(void);
+
+/* namespace.c */
+extern char *nfs_path(const char *base, const struct dentry *dentry,
+                      char *buffer, ssize_t buflen);
+
+/*
+ * Determine the mount path as a string
+ */
+static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
+{
+        return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
+}
+
+/*
+ * Determine the device name as a string
+ */
+static inline char *nfs_devname(const struct vfsmount *mnt_parent,
+                         const struct dentry *dentry,
+                         char *buffer, ssize_t buflen)
+{
+        return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
+}
+
+/*
+ * Determine the actual block size (and log2 thereof)
+ */
+static inline
+unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
+{
+        /* make sure blocksize is a power of two */
+        if ((bsize & (bsize - 1)) || nrbitsp) {
+                unsigned char   nrbits;
+
+                for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
+                        ;
+                bsize = 1 << nrbits;
+                if (nrbitsp)
+                        *nrbitsp = nrbits;
+        }
+
+        return bsize;
+}
+
+/*
+ * Calculate the number of 512byte blocks used.
+ */
+static inline unsigned long nfs_calc_block_size(u64 tsize)
+{
+        loff_t used = (tsize + 511) >> 9;
+        return (used > ULONG_MAX) ? ULONG_MAX : used;
+}
+
+/*
+ * Compute and set NFS server blocksize
+ */
+static inline
+unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
+{
+        if (bsize < NFS_MIN_FILE_IO_SIZE)
+                bsize = NFS_DEF_FILE_IO_SIZE;
+        else if (bsize >= NFS_MAX_FILE_IO_SIZE)
+                bsize = NFS_MAX_FILE_IO_SIZE;
+
+        return nfs_block_bits(bsize, nrbitsp);
+}
+
+/*
+ * Determine the maximum file size for a superblock
+ */
+static inline
+void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
+{
+        sb->s_maxbytes = (loff_t)maxfilesize;
+        if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
+                sb->s_maxbytes = MAX_LFS_FILESIZE;
+}
+
+/*
+ * Check if the string represents a "valid" IPv4 address
+ */
+static inline int valid_ipaddr4(const char *buf)
+{
+        int rc, count, in[4];
+
+        rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
+        if (rc != 4)
+                return -EINVAL;
+        for (count = 0; count < 4; count++) {
+                if (in[count] > 255)
+                        return -EINVAL;
+        }
+        return 0;
+}