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Linux/fs/coda/coda_fs_i.h

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  1 /*
  2  *  coda_fs_i.h
  3  *
  4  *  Copyright (C) 1998 Carnegie Mellon University
  5  *
  6  */
  7 
  8 #ifndef _LINUX_CODA_FS_I
  9 #define _LINUX_CODA_FS_I
 10 
 11 #include <linux/types.h>
 12 #include <linux/list.h>
 13 #include <linux/spinlock.h>
 14 #include <linux/coda.h>
 15 
 16 /*
 17  * coda fs inode data
 18  * c_lock protects accesses to c_flags, c_mapcount, c_cached_epoch, c_uid and
 19  * c_cached_perm.
 20  * vfs_inode is set only when the inode is created and never changes.
 21  * c_fid is set when the inode is created and should be considered immutable.
 22  */
 23 struct coda_inode_info {
 24         struct CodaFid     c_fid;       /* Coda identifier */
 25         u_short            c_flags;     /* flags (see below) */
 26         unsigned int       c_mapcount;  /* nr of times this inode is mapped */
 27         unsigned int       c_cached_epoch; /* epoch for cached permissions */
 28         kuid_t             c_uid;       /* fsuid for cached permissions */
 29         unsigned int       c_cached_perm; /* cached access permissions */
 30         spinlock_t         c_lock;
 31         struct inode       vfs_inode;
 32 };
 33 
 34 /*
 35  * coda fs file private data
 36  */
 37 #define CODA_MAGIC 0xC0DAC0DA
 38 struct coda_file_info {
 39         int                cfi_magic;     /* magic number */
 40         struct file       *cfi_container; /* container file for this cnode */
 41         unsigned int       cfi_mapcount;  /* nr of times this file is mapped */
 42 };
 43 
 44 #define CODA_FTOC(file) ((struct coda_file_info *)((file)->private_data))
 45 
 46 /* flags */
 47 #define C_VATTR       0x1   /* Validity of vattr in inode */
 48 #define C_FLUSH       0x2   /* used after a flush */
 49 #define C_DYING       0x4   /* from venus (which died) */
 50 #define C_PURGE       0x8
 51 
 52 struct inode *coda_cnode_make(struct CodaFid *, struct super_block *);
 53 struct inode *coda_iget(struct super_block *sb, struct CodaFid *fid, struct coda_vattr *attr);
 54 struct inode *coda_cnode_makectl(struct super_block *sb);
 55 struct inode *coda_fid_to_inode(struct CodaFid *fid, struct super_block *sb);
 56 void coda_replace_fid(struct inode *, struct CodaFid *, struct CodaFid *);
 57 
 58 #endif
 59 

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