LXR linux/fs/coda/coda

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* 
   3 * Coda File System, Linux Kernel module
   4 * 
   5 * Original version, adapted from cfs_mach.c, (C) Carnegie Mellon University
   6 * Linux modifications (C) 1996, Peter J. Braam
   7 * Rewritten for Linux 2.1 (C) 1997 Carnegie Mellon University
   8 *
   9 * Carnegie Mellon University encourages users of this software to
  10 * contribute improvements to the Coda project.
  11 */
  12
  13#ifndef _LINUX_CODA_FS
  14#define _LINUX_CODA_FS
  15
  16#ifdef pr_fmt
  17#undef pr_fmt
  18#endif
  19
  20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22#include <linux/kernel.h>
  23#include <linux/param.h>
  24#include <linux/mm.h>
  25#include <linux/vmalloc.h>
  26#include <linux/slab.h>
  27#include <linux/wait.h>         
  28#include <linux/types.h>
  29#include <linux/fs.h>
  30#include "coda_fs_i.h"
  31
  32/* operations */
  33extern const struct inode_operations coda_dir_inode_operations;
  34extern const struct inode_operations coda_file_inode_operations;
  35extern const struct inode_operations coda_ioctl_inode_operations;
  36
  37extern const struct dentry_operations coda_dentry_operations;
  38
  39extern const struct address_space_operations coda_file_aops;
  40extern const struct address_space_operations coda_symlink_aops;
  41
  42extern const struct file_operations coda_dir_operations;
  43extern const struct file_operations coda_file_operations;
  44extern const struct file_operations coda_ioctl_operations;
  45
  46/* operations shared over more than one file */
  47int coda_open(struct inode *i, struct file *f);
  48int coda_release(struct inode *i, struct file *f);
  49int coda_permission(struct inode *inode, int mask);
  50int coda_revalidate_inode(struct inode *);
  51int coda_getattr(const struct path *, struct kstat *, u32, unsigned int);
  52int coda_setattr(struct dentry *, struct iattr *);
  53
  54/* this file:  heloers */
  55char *coda_f2s(struct CodaFid *f);
  56int coda_iscontrol(const char *name, size_t length);
  57
  58void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  59void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  60unsigned short coda_flags_to_cflags(unsigned short);
  61
  62/* sysctl.h */
  63void coda_sysctl_init(void);
  64void coda_sysctl_clean(void);
  65
  66#define CODA_ALLOC(ptr, cast, size) do { \
  67    if (size < PAGE_SIZE) \
  68        ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
  69    else \
  70        ptr = (cast)vzalloc((unsigned long) size); \
  71    if (!ptr) \
  72        pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
  73} while (0)
  74
  75
  76#define CODA_FREE(ptr, size) kvfree((ptr))
  77
  78/* inode to cnode access functions */
  79
  80static inline struct coda_inode_info *ITOC(struct inode *inode)
  81{
  82        return container_of(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