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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/fs/coda/coda_psdev.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef __CODA_PSDEV_H

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#define __CODA_PSDEV_H

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#include <linux/backing-dev.h>

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#include <linux/magic.h>

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#include <linux/mutex.h>

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#define CODA_PSDEV_MAJOR 67

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#define MAX_CODADEVS  5	   /* how many do we allow */

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struct kstatfs;

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/* messages between coda filesystem in kernel and Venus */

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struct upc_req {

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	struct list_head	uc_chain;

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	caddr_t			uc_data;

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	u_short			uc_flags;

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	u_short			uc_inSize;  /* Size is at most 5000 bytes */

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	u_short			uc_outSize;

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	u_short			uc_opcode;  /* copied from data to save lookup */

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	int			uc_unique;

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	wait_queue_head_t	uc_sleep;   /* process' wait queue */

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};

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#define CODA_REQ_ASYNC  0x1

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#define CODA_REQ_READ   0x2

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#define CODA_REQ_WRITE  0x4

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#define CODA_REQ_ABORT  0x8

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/* communication pending/processing queues */

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struct venus_comm {

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	u_long		    vc_seq;

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	wait_queue_head_t   vc_waitq; /* Venus wait queue */

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	struct list_head    vc_pending;

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	struct list_head    vc_processing;

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	int                 vc_inuse;

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	struct super_block *vc_sb;

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	struct mutex	    vc_mutex;

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};

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static inline struct venus_comm *coda_vcp(struct super_block *sb)

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{

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	return (struct venus_comm *)((sb)->s_fs_info);

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}

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/* upcalls */

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int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);

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int venus_getattr(struct super_block *sb, struct CodaFid *fid,

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		  struct coda_vattr *attr);

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int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);

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int venus_lookup(struct super_block *sb, struct CodaFid *fid,

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		 const char *name, int length, int *type,

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		 struct CodaFid *resfid);

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int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,

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		kuid_t uid);

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int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,

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	       struct file **f);

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int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,

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		const char *name, int length,

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		struct CodaFid *newfid, struct coda_vattr *attrs);

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int venus_create(struct super_block *sb, struct CodaFid *dirfid,

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		 const char *name, int length, int excl, int mode,

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		 struct CodaFid *newfid, struct coda_vattr *attrs);

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int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,

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		const char *name, int length);

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int venus_remove(struct super_block *sb, struct CodaFid *dirfid,

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		 const char *name, int length);

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int venus_readlink(struct super_block *sb, struct CodaFid *fid,

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		   char *buffer, int *length);

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int venus_rename(struct super_block *sb, struct CodaFid *new_fid,

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		 struct CodaFid *old_fid, size_t old_length,

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		 size_t new_length, const char *old_name,

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		 const char *new_name);

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int venus_link(struct super_block *sb, struct CodaFid *fid,

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		  struct CodaFid *dirfid, const char *name, int len );

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int venus_symlink(struct super_block *sb, struct CodaFid *fid,

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		  const char *name, int len, const char *symname, int symlen);

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int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);

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int venus_pioctl(struct super_block *sb, struct CodaFid *fid,

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		 unsigned int cmd, struct PioctlData *data);

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int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,

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		  size_t nbytes);

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int venus_fsync(struct super_block *sb, struct CodaFid *fid);

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int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);

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int venus_access_intent(struct super_block *sb, struct CodaFid *fid,

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			bool *access_intent_supported,

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			size_t count, loff_t ppos, int type);

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/*

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 * Statistics

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 */

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extern struct venus_comm coda_comms[];

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#endif

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