include/linux/coda_cache.h

   1 /* Coda filesystem -- Linux Minicache
   2  *
   3  * Copyright (C) 1989 - 1997 Carnegie Mellon University
   4  *
   5  * Carnegie Mellon University encourages users of this software to
   6  * contribute improvements to the Coda project. Contact Peter Braam
   7  * <coda@cs.cmu.edu>
   8  */
   9
  10 #ifndef _CFSNC_HEADER_
  11 #define _CFSNC_HEADER_
  12
  13 /*
  14  * Structure for an element in the Coda Credential Cache.
  15  */
  16
  17 struct coda_cache {
  18         struct list_head   cc_cclist;  /* list of all cache entries */
  19         struct list_head   cc_cnlist;  /* list of cache entries/cnode */
  20         int                cc_mask;
  21         struct coda_cred   cc_cred;
  22 };
  23
  24 /* credential cache */
  25 void coda_cache_enter(struct inode *inode, int mask);
  26 void coda_cache_clear_inode(struct inode *);
  27 void coda_cache_clear_all(struct super_block *sb);
  28 void coda_cache_clear_cred(struct super_block *sb, struct coda_cred *cred);
  29 int coda_cache_check(struct inode *inode, int mask);
  30
  31 /* for downcalls and attributes and lookups */
  32 void coda_flag_inode(struct inode *inode, int flag);
  33 void coda_flag_inode_children(struct inode *inode, int flag);
  34
  35
  36 /*
  37  * Structure to contain statistics on the cache usage
  38  */
  39
  40 struct cfsnc_statistics {
  41         unsigned        hits;
  42         unsigned        misses;
  43         unsigned        enters;
  44         unsigned        dbl_enters;
  45         unsigned        long_name_enters;
  46         unsigned        long_name_lookups;
  47         unsigned        long_remove;
  48         unsigned        lru_rm;
  49         unsigned        zapPfids;
  50         unsigned        zapFids;
  51         unsigned        zapFile;
  52         unsigned        zapUsers;
  53         unsigned        Flushes;
  54         unsigned        Sum_bucket_len;
  55         unsigned        Sum2_bucket_len;
  56         unsigned        Max_bucket_len;
  57         unsigned        Num_zero_len;
  58         unsigned        Search_len;
  59 };
  60
  61
  62 #define CFSNC_FIND              ((u_long) 1)
  63 #define CFSNC_REMOVE            ((u_long) 2)
  64 #define CFSNC_INIT              ((u_long) 3)
  65 #define CFSNC_ENTER             ((u_long) 4)
  66 #define CFSNC_LOOKUP            ((u_long) 5)
  67 #define CFSNC_ZAPPFID           ((u_long) 6)
  68 #define CFSNC_ZAPFID            ((u_long) 7)
  69 #define CFSNC_ZAPVNODE          ((u_long) 8)
  70 #define CFSNC_ZAPFILE           ((u_long) 9)
  71 #define CFSNC_PURGEUSER ((u_long) 10)
  72 #define CFSNC_FLUSH             ((u_long) 11)
  73 #define CFSNC_PRINTCFSNC        ((u_long) 12)
  74 #define CFSNC_PRINTSTATS        ((u_long) 13)
  75 #define CFSNC_REPLACE           ((u_long) 14)
  76
  77 #endif _CFSNC_HEADER_