LXR linux/fs/coda/coda

   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
  12struct kstatfs;
  13
  14/* messages between coda filesystem in kernel and Venus */
  15struct 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 */
  32struct 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
  42static inline struct venus_comm *coda_vcp(struct super_block *sb)
  43{
  44        return (struct venus_comm *)((sb)->s_fs_info);
  45}
  46
  47/* upcalls */
  48int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
  49int venus_getattr(struct super_block *sb, struct CodaFid *fid,
  50                  struct coda_vattr *attr);
  51int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
  52int venus_lookup(struct super_block *sb, struct CodaFid *fid,
  53                 const char *name, int length, int *type,
  54                 struct CodaFid *resfid);
  55int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
  56                kuid_t uid);
  57int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
  58               struct file **f);
  59int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
  60                const char *name, int length,
  61                struct CodaFid *newfid, struct coda_vattr *attrs);
  62int 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);
  65int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
  66                const char *name, int length);
  67int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
  68                 const char *name, int length);
  69int venus_readlink(struct super_block *sb, struct CodaFid *fid,
  70                   char *buffer, int *length);
  71int 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);
  75int venus_link(struct super_block *sb, struct CodaFid *fid,
  76                  struct CodaFid *dirfid, const char *name, int len );
  77int venus_symlink(struct super_block *sb, struct CodaFid *fid,
  78                  const char *name, int len, const char *symname, int symlen);
  79int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
  80int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
  81                 unsigned int cmd, struct PioctlData *data);
  82int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,
  83                  size_t nbytes);
  84int venus_fsync(struct super_block *sb, struct CodaFid *fid);
  85int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
  86int 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
  94extern struct venus_comm coda_comms[];
  95#endif
  96