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/*
* 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;
}
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