f7cc02b871
Now that shared inode state is locked using the cii->c_lock, the BKL is only used to protect the upcall queues used to communicate with the userspace cache manager. The remaining state is all local and we can push the lock further down into coda_upcall(). Signed-off-by: Yoshihisa Abe <yoshiabe@cs.cmu.edu> Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
#ifndef __CODA_PSDEV_H
|
|
#define __CODA_PSDEV_H
|
|
|
|
#include <linux/magic.h>
|
|
|
|
#define CODA_PSDEV_MAJOR 67
|
|
#define MAX_CODADEVS 5 /* how many do we allow */
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/backing-dev.h>
|
|
|
|
struct kstatfs;
|
|
|
|
/* communication pending/processing queues */
|
|
struct venus_comm {
|
|
u_long vc_seq;
|
|
wait_queue_head_t vc_waitq; /* Venus wait queue */
|
|
struct list_head vc_pending;
|
|
struct list_head vc_processing;
|
|
int vc_inuse;
|
|
struct super_block *vc_sb;
|
|
struct backing_dev_info bdi;
|
|
};
|
|
|
|
|
|
static inline struct venus_comm *coda_vcp(struct super_block *sb)
|
|
{
|
|
return (struct venus_comm *)((sb)->s_fs_info);
|
|
}
|
|
|
|
/* upcalls */
|
|
int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
|
|
int venus_getattr(struct super_block *sb, struct CodaFid *fid,
|
|
struct coda_vattr *attr);
|
|
int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
|
|
int venus_lookup(struct super_block *sb, struct CodaFid *fid,
|
|
const char *name, int length, int *type,
|
|
struct CodaFid *resfid);
|
|
int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
|
|
vuid_t uid);
|
|
int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
|
|
struct file **f);
|
|
int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length,
|
|
struct CodaFid *newfid, struct coda_vattr *attrs);
|
|
int venus_create(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length, int excl, int mode,
|
|
struct CodaFid *newfid, struct coda_vattr *attrs) ;
|
|
int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length);
|
|
int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
|
|
const char *name, int length);
|
|
int venus_readlink(struct super_block *sb, struct CodaFid *fid,
|
|
char *buffer, int *length);
|
|
int venus_rename(struct super_block *, struct CodaFid *new_fid,
|
|
struct CodaFid *old_fid, size_t old_length,
|
|
size_t new_length, const char *old_name,
|
|
const char *new_name);
|
|
int venus_link(struct super_block *sb, struct CodaFid *fid,
|
|
struct CodaFid *dirfid, const char *name, int len );
|
|
int venus_symlink(struct super_block *sb, struct CodaFid *fid,
|
|
const char *name, int len, const char *symname, int symlen);
|
|
int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
|
|
int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
|
|
unsigned int cmd, struct PioctlData *data);
|
|
int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out);
|
|
int venus_fsync(struct super_block *sb, struct CodaFid *fid);
|
|
int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
|
|
|
|
/*
|
|
* Statistics
|
|
*/
|
|
|
|
extern struct venus_comm coda_comms[];
|
|
#endif /* __KERNEL__ */
|
|
|
|
/* messages between coda filesystem in kernel and Venus */
|
|
struct upc_req {
|
|
struct list_head uc_chain;
|
|
caddr_t uc_data;
|
|
u_short uc_flags;
|
|
u_short uc_inSize; /* Size is at most 5000 bytes */
|
|
u_short uc_outSize;
|
|
u_short uc_opcode; /* copied from data to save lookup */
|
|
int uc_unique;
|
|
wait_queue_head_t uc_sleep; /* process' wait queue */
|
|
};
|
|
|
|
#define CODA_REQ_ASYNC 0x1
|
|
#define CODA_REQ_READ 0x2
|
|
#define CODA_REQ_WRITE 0x4
|
|
#define CODA_REQ_ABORT 0x8
|
|
|
|
#endif
|