include/linux/coda_psdev.h

   1 #ifndef __CODA_PSDEV_H
   2 #define __CODA_PSDEV_H
   3
   4 #define CODA_PSDEV_MAJOR 67
   5 #define MAX_CODADEVS  5    /* how many do we allow */
   6
   7 extern struct venus_comm coda_upc_comm;
   8 extern struct coda_sb_info coda_super_info;
   9 #define CODA_SUPER_MAGIC        0x73757245
  10
  11 struct coda_sb_info
  12 {
  13         struct inode *      sbi_psdev;     /* /dev/cfs? Venus/kernel device */
  14         struct inode *      sbi_ctlcp;     /* control magic file */
  15         int                 sbi_refct;
  16         struct venus_comm *      sbi_vcomm;
  17         struct inode *      sbi_root;
  18         struct super_block *sbi_sb;
  19         struct list_head    sbi_cchead;
  20         struct list_head    sbi_volroothead;
  21 };
  22
  23 /* communication pending/processing queues */
  24 struct venus_comm {
  25         u_long              vc_seq;
  26         wait_queue_head_t   vc_waitq; /* Venus wait queue */
  27         struct list_head    vc_pending;
  28         struct list_head    vc_processing;
  29         int                 vc_inuse;
  30         pid_t               vc_pid;   /* Venus pid */
  31 };
  32
  33
  34 static inline struct coda_sb_info *coda_sbp(struct super_block *sb)
  35 {
  36     return ((struct coda_sb_info *)((sb)->u.generic_sbp));
  37 }
  38
  39
  40
  41 extern void coda_psdev_detach(int unit);
  42 extern int  init_coda_psdev(void);
  43
  44
  45 /* upcalls */
  46 int venus_rootfid(struct super_block *sb, ViceFid *fidp);
  47 int venus_getattr(struct super_block *sb, struct ViceFid *fid,
  48                      struct coda_vattr *attr);
  49 int venus_setattr(struct super_block *, struct ViceFid *,
  50                      struct coda_vattr *);
  51 int venus_lookup(struct super_block *sb, struct ViceFid *fid,
  52                     const char *name, int length, int *type,
  53                     struct ViceFid *resfid);
  54 int venus_release(struct super_block *sb, struct ViceFid *fid, int flags,
  55                   struct coda_cred *);
  56 int venus_open(struct super_block *sb, struct ViceFid *fid,
  57                   int flags, ino_t *ino, dev_t *dev);
  58 int venus_mkdir(struct super_block *sb, struct ViceFid *dirfid,
  59                           const char *name, int length,
  60                           struct ViceFid *newfid, struct coda_vattr *attrs);
  61 int venus_create(struct super_block *sb, struct ViceFid *dirfid,
  62                     const char *name, int length, int excl, int mode, int rdev,
  63                     struct ViceFid *newfid, struct coda_vattr *attrs) ;
  64 int venus_rmdir(struct super_block *sb, struct ViceFid *dirfid,
  65                     const char *name, int length);
  66 int venus_remove(struct super_block *sb, struct ViceFid *dirfid,
  67                  const char *name, int length);
  68 int venus_readlink(struct super_block *sb, struct ViceFid *fid,
  69                    char *buffer, int *length);
  70 int venus_rename(struct super_block *, struct ViceFid *new_fid,
  71                  struct ViceFid *old_fid, size_t old_length,
  72                  size_t new_length, const char *old_name,
  73                  const char *new_name);
  74 int venus_link(struct super_block *sb, struct ViceFid *fid,
  75                   struct ViceFid *dirfid, const char *name, int len );
  76 int venus_symlink(struct super_block *sb, struct ViceFid *fid,
  77                   const char *name, int len, const char *symname, int symlen);
  78 int venus_access(struct super_block *sb, struct ViceFid *fid, int mask);
  79 int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
  80                  unsigned int cmd, struct PioctlData *data);
  81 int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
  82 int venus_fsync(struct super_block *sb, struct ViceFid *fid);
  83 int venus_statfs(struct super_block *sb, struct statfs *sfs);
  84
  85
  86 /* messages between coda filesystem in kernel and Venus */
  87 extern int coda_hard;
  88 extern unsigned long coda_timeout;
  89 struct upc_req {
  90         struct list_head    uc_chain;
  91         caddr_t             uc_data;
  92         u_short             uc_flags;
  93         u_short             uc_inSize;  /* Size is at most 5000 bytes */
  94         u_short             uc_outSize;
  95         u_short             uc_opcode;  /* copied from data to save lookup */
  96         int                 uc_unique;
  97         wait_queue_head_t   uc_sleep;   /* process' wait queue */
  98         unsigned long       uc_posttime;
  99 };
 100
 101 #define REQ_ASYNC  0x1
 102 #define REQ_READ   0x2
 103 #define REQ_WRITE  0x4
 104
 105
 106 /*
 107  * Statistics
 108  */
 109 struct coda_upcallstats {
 110         int     ncalls;                 /* client requests */
 111         int     nbadcalls;              /* upcall failures */
 112         int     reqs[CODA_NCALLS];      /* count of each request */
 113 } ;
 114
 115 extern struct coda_upcallstats coda_callstats;
 116
 117 static inline void clstats(int opcode)
 118 {
 119     coda_callstats.ncalls++;
 120     if ( (0 <= opcode) && (opcode <= CODA_NCALLS) )
 121         coda_callstats.reqs[opcode]++;
 122     else
 123         printk("clstats called with bad opcode %d\n", opcode);
 124 }
 125
 126 static inline void badclstats(void)
 127 {
 128     coda_callstats.nbadcalls++;
 129 }
 130
 131 #endif