fs/coda/coda_linux.h

   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 */
  32 extern const struct inode_operations coda_dir_inode_operations;
  33 extern const struct inode_operations coda_file_inode_operations;
  34 extern const struct inode_operations coda_ioctl_inode_operations;
  35
  36 extern const struct dentry_operations coda_dentry_operations;
  37
  38 extern const struct address_space_operations coda_file_aops;
  39 extern const struct address_space_operations coda_symlink_aops;
  40
  41 extern const struct file_operations coda_dir_operations;
  42 extern const struct file_operations coda_file_operations;
  43 extern const struct file_operations coda_ioctl_operations;
  44
  45 /* operations shared over more than one file */
  46 int coda_open(struct inode *i, struct file *f);
  47 int coda_release(struct inode *i, struct file *f);
  48 int coda_permission(struct inode *inode, int mask);
  49 int coda_revalidate_inode(struct inode *);
  50 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  51 int coda_setattr(struct dentry *, struct iattr *);
  52
  53 /* this file:  heloers */
  54 char *coda_f2s(struct CodaFid *f);
  55 int coda_isroot(struct inode *i);
  56 int coda_iscontrol(const char *name, size_t length);
  57
  58 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  59 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  60 unsigned short coda_flags_to_cflags(unsigned short);
  61
  62 /* sysctl.h */
  63 void coda_sysctl_init(void);
  64 void 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) \
  77     do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
  78
  79 /* inode to cnode access functions */
  80
  81 static inline struct coda_inode_info *ITOC(struct inode *inode)
  82 {
  83         return list_entry(inode, struct coda_inode_info, vfs_inode);
  84 }
  85
  86 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
  87 {
  88         return &(ITOC(inode)->c_fid);
  89 }
  90
  91 static __inline__ char *coda_i2s(struct inode *inode)
  92 {
  93         return coda_f2s(&(ITOC(inode)->c_fid));
  94 }
  95
  96 /* this will not zap the inode away */
  97 static __inline__ void coda_flag_inode(struct inode *inode, int flag)
  98 {
  99         struct coda_inode_info *cii = ITOC(inode);
 100
 101         spin_lock(&cii->c_lock);
 102         cii->c_flags |= flag;
 103         spin_unlock(&cii->c_lock);
 104 }
 105
 106 #endif