LXR linux/fs/coda/coda

   1/* 
   2 * Coda File System, Linux Kernel module
   3 * 
   4 * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
   5 * Linux modifications (C) 1996, Peter J. Braam
   6 * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
   7 *
   8 * Carnegie Mellon University encourages users of this software to
   9 * contribute improvements to the Coda project.
  10 */
  11
  12#ifndef _LINUX_CODA_FS
  13#define _LINUX_CODA_FS
  14
  15#include <linux/kernel.h>
  16#include <linux/param.h>
  17#include <linux/mm.h>
  18#include <linux/vmalloc.h>
  19#include <linux/slab.h>
  20#include <linux/wait.h>         
  21#include <linux/types.h>
  22#include <linux/fs.h>
  23#include "coda_fs_i.h"
  24
  25/* operations */
  26extern const struct inode_operations coda_dir_inode_operations;
  27extern const struct inode_operations coda_file_inode_operations;
  28extern const struct inode_operations coda_ioctl_inode_operations;
  29
  30extern const struct dentry_operations coda_dentry_operations;
  31
  32extern const struct address_space_operations coda_file_aops;
  33extern const struct address_space_operations coda_symlink_aops;
  34
  35extern const struct file_operations coda_dir_operations;
  36extern const struct file_operations coda_file_operations;
  37extern const struct file_operations coda_ioctl_operations;
  38
  39/* operations shared over more than one file */
  40int coda_open(struct inode *i, struct file *f);
  41int coda_release(struct inode *i, struct file *f);
  42int coda_permission(struct inode *inode, int mask, unsigned int flags);
  43int coda_revalidate_inode(struct dentry *);
  44int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  45int coda_setattr(struct dentry *, struct iattr *);
  46
  47/* this file:  heloers */
  48char *coda_f2s(struct CodaFid *f);
  49int coda_isroot(struct inode *i);
  50int coda_iscontrol(const char *name, size_t length);
  51
  52void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  53void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  54unsigned short coda_flags_to_cflags(unsigned short);
  55
  56/* sysctl.h */
  57void coda_sysctl_init(void);
  58void coda_sysctl_clean(void);
  59
  60#define CODA_ALLOC(ptr, cast, size) do { \
  61    if (size < PAGE_SIZE) \
  62        ptr = kmalloc((unsigned long) size, GFP_KERNEL); \
  63    else \
  64        ptr = (cast)vmalloc((unsigned long) size); \
  65    if (!ptr) \
  66        printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
  67    else memset( ptr, 0, size ); \
  68} while (0)
  69
  70
  71#define CODA_FREE(ptr,size) \
  72    do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
  73
  74/* inode to cnode access functions */
  75
  76static inline struct coda_inode_info *ITOC(struct inode *inode)
  77{
  78        return list_entry(inode, struct coda_inode_info, vfs_inode);
  79}
  80
  81static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
  82{
  83        return &(ITOC(inode)->c_fid);
  84}
  85
  86static __inline__ char *coda_i2s(struct inode *inode)
  87{
  88        return coda_f2s(&(ITOC(inode)->c_fid));
  89}
  90
  91/* this will not zap the inode away */
  92static __inline__ void coda_flag_inode(struct inode *inode, int flag)
  93{
  94        struct coda_inode_info *cii = ITOC(inode);
  95
  96        spin_lock(&cii->c_lock);
  97        cii->c_flags |= flag;
  98        spin_unlock(&cii->c_lock);
  99}               
 100
 101#endif
 102