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TOMOYO Linux Cross Reference
Linux/fs/coda/coda_linux.h

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  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
102 

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