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#ifdef pr_fmt
  16#undef pr_fmt
  17#endif
  18
  19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21#include <linux/kernel.h>
  22#include <linux/param.h>
  23#include <linux/mm.h>
  24#include <linux/vmalloc.h>
  25#include <linux/slab.h>
  26#include <linux/wait.h>         
  27#include <linux/types.h>
  28#include <linux/fs.h>
  29#include "coda_fs_i.h"
  30
  31/* operations */
  32extern const struct inode_operations coda_dir_inode_operations;
  33extern const struct inode_operations coda_file_inode_operations;
  34extern const struct inode_operations coda_ioctl_inode_operations;
  35
  36extern const struct dentry_operations coda_dentry_operations;
  37
  38extern const struct address_space_operations coda_file_aops;
  39extern const struct address_space_operations coda_symlink_aops;
  40
  41extern const struct file_operations coda_dir_operations;
  42extern const struct file_operations coda_file_operations;
  43extern const struct file_operations coda_ioctl_operations;
  44
  45/* operations shared over more than one file */
  46int coda_open(struct inode *i, struct file *f);
  47int coda_release(struct inode *i, struct file *f);
  48int coda_permission(struct inode *inode, int mask);
  49int coda_revalidate_inode(struct inode *);
  50int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  51int coda_setattr(struct dentry *, struct iattr *);
  52
  53/* this file:  heloers */
  54char *coda_f2s(struct CodaFid *f);
  55int coda_iscontrol(const char *name, size_t length);
  56
  57void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  58void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  59unsigned short coda_flags_to_cflags(unsigned short);
  60
  61/* sysctl.h */
  62void coda_sysctl_init(void);
  63void coda_sysctl_clean(void);
  64
  65#define CODA_ALLOC(ptr, cast, size) do { \
  66    if (size < PAGE_SIZE) \
  67        ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
  68    else \
  69        ptr = (cast)vzalloc((unsigned long) size); \
  70    if (!ptr) \
  71        pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
  72} while (0)
  73
  74
  75#define CODA_FREE(ptr,size) \
  76    do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
  77
  78/* inode to cnode access functions */
  79
  80static inline struct coda_inode_info *ITOC(struct inode *inode)
  81{
  82        return list_entry(inode, struct coda_inode_info, vfs_inode);
  83}
  84
  85static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
  86{
  87        return &(ITOC(inode)->c_fid);
  88}
  89
  90static __inline__ char *coda_i2s(struct inode *inode)
  91{
  92        return coda_f2s(&(ITOC(inode)->c_fid));
  93}
  94
  95/* this will not zap the inode away */
  96static __inline__ void coda_flag_inode(struct inode *inode, int flag)
  97{
  98        struct coda_inode_info *cii = ITOC(inode);
  99
 100        spin_lock(&cii->c_lock);
 101        cii->c_flags |= flag;
 102        spin_unlock(&cii->c_lock);
 103}               
 104
 105#endif
 106