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 #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 */
  26 extern const struct inode_operations coda_dir_inode_operations;
  27 extern const struct inode_operations coda_file_inode_operations;
  28 extern const struct inode_operations coda_ioctl_inode_operations;
  29
  30 extern const struct dentry_operations coda_dentry_operations;
  31
  32 extern const struct address_space_operations coda_file_aops;
  33 extern const struct address_space_operations coda_symlink_aops;
  34
  35 extern const struct file_operations coda_dir_operations;
  36 extern const struct file_operations coda_file_operations;
  37 extern const struct file_operations coda_ioctl_operations;
  38
  39 /* operations shared over more than one file */
  40 int coda_open(struct inode *i, struct file *f);
  41 int coda_release(struct inode *i, struct file *f);
  42 int coda_permission(struct inode *inode, int mask, unsigned int flags);
  43 int coda_revalidate_inode(struct dentry *);
  44 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  45 int coda_setattr(struct dentry *, struct iattr *);
  46
  47 /* this file:  heloers */
  48 char *coda_f2s(struct CodaFid *f);
  49 int coda_isroot(struct inode *i);
  50 int coda_iscontrol(const char *name, size_t length);
  51
  52 void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
  53 void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
  54 unsigned short coda_flags_to_cflags(unsigned short);
  55
  56 /* sysctl.h */
  57 void coda_sysctl_init(void);
  58 void 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
  76 static inline struct coda_inode_info *ITOC(struct inode *inode)
  77 {
  78         return list_entry(inode, struct coda_inode_info, vfs_inode);
  79 }
  80
  81 static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
  82 {
  83         return &(ITOC(inode)->c_fid);
  84 }
  85
  86 static __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 */
  92 static __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