fs/coda/coda_psdev.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __CODA_PSDEV_H
   3 #define __CODA_PSDEV_H
   4
   5 #include <linux/backing-dev.h>
   6 #include <linux/magic.h>
   7 #include <linux/mutex.h>
   8
   9 #define CODA_PSDEV_MAJOR 67
  10 #define MAX_CODADEVS  5    /* how many do we allow */
  11
  12 struct kstatfs;
  13
  14 /* messages between coda filesystem in kernel and Venus */
  15 struct upc_req {
  16         struct list_head        uc_chain;
  17         caddr_t                 uc_data;
  18         u_short                 uc_flags;
  19         u_short                 uc_inSize;  /* Size is at most 5000 bytes */
  20         u_short                 uc_outSize;
  21         u_short                 uc_opcode;  /* copied from data to save lookup */
  22         int                     uc_unique;
  23         wait_queue_head_t       uc_sleep;   /* process' wait queue */
  24 };
  25
  26 #define CODA_REQ_ASYNC  0x1
  27 #define CODA_REQ_READ   0x2
  28 #define CODA_REQ_WRITE  0x4
  29 #define CODA_REQ_ABORT  0x8
  30
  31 /* communication pending/processing queues */
  32 struct venus_comm {
  33         u_long              vc_seq;
  34         wait_queue_head_t   vc_waitq; /* Venus wait queue */
  35         struct list_head    vc_pending;
  36         struct list_head    vc_processing;
  37         int                 vc_inuse;
  38         struct super_block *vc_sb;
  39         struct mutex        vc_mutex;
  40 };
  41
  42 static inline struct venus_comm *coda_vcp(struct super_block *sb)
  43 {
  44         return (struct venus_comm *)((sb)->s_fs_info);
  45 }
  46
  47 /* upcalls */
  48 int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
  49 int venus_getattr(struct super_block *sb, struct CodaFid *fid,
  50                   struct coda_vattr *attr);
  51 int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
  52 int venus_lookup(struct super_block *sb, struct CodaFid *fid,
  53                  const char *name, int length, int *type,
  54                  struct CodaFid *resfid);
  55 int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
  56                 kuid_t uid);
  57 int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
  58                struct file **f);
  59 int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
  60                 const char *name, int length,
  61                 struct CodaFid *newfid, struct coda_vattr *attrs);
  62 int venus_create(struct super_block *sb, struct CodaFid *dirfid,
  63                  const char *name, int length, int excl, int mode,
  64                  struct CodaFid *newfid, struct coda_vattr *attrs);
  65 int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
  66                 const char *name, int length);
  67 int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
  68                  const char *name, int length);
  69 int venus_readlink(struct super_block *sb, struct CodaFid *fid,
  70                    char *buffer, int *length);
  71 int venus_rename(struct super_block *sb, struct CodaFid *new_fid,
  72                  struct CodaFid *old_fid, size_t old_length,
  73                  size_t new_length, const char *old_name,
  74                  const char *new_name);
  75 int venus_link(struct super_block *sb, struct CodaFid *fid,
  76                   struct CodaFid *dirfid, const char *name, int len );
  77 int venus_symlink(struct super_block *sb, struct CodaFid *fid,
  78                   const char *name, int len, const char *symname, int symlen);
  79 int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
  80 int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
  81                  unsigned int cmd, struct PioctlData *data);
  82 int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,
  83                   size_t nbytes);
  84 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
  85 int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
  86 int venus_access_intent(struct super_block *sb, struct CodaFid *fid,
  87                         bool *access_intent_supported,
  88                         size_t count, loff_t ppos, int type);
  89
  90 /*
  91  * Statistics
  92  */
  93
  94 extern struct venus_comm coda_comms[];
  95 #endif